Soppers of the World Arise! Down With This Sissy Stuff!
Here's One To Keep You Lying Awake Nights
He Might Find It Easier To Change His Name
No One Got Gypped and Everybody's Happy
A Darkroom Is Only As Safe As Its Unsafest Safelight
He Would Put the Bearskins on the Bare Skins
"It Seems To Be So" Never Satisfied Euclid
An Introduction to Horner, for Which He Is Grateful
If He Turns to Page 61 His Squawk Will Be Answered
But We've Yet To See the Magician Who Shows You How It's Done
It's Easier for Readers To Hold and It Holds This Reader
What Makes Frost Appear When the Air Isn't Freezing?
Turtles Aren't So Dumb: Remember the Hare and the Tortoise Fable
How would you like to write one short letter that would bring you $50 in cash? Here’s your chance. All you have to do is write 300 words or less telling us what article, feature, or department in this issue of POPULAR SCIENCE MONTHLY you liked most and why.
GASOLINE, oil, air, water, and repair tools are all made available to motorists by an automatic, coin-operated service station invented by Peggy K. Masson, of Forest Hills, N.Y. When a motorist drives up to the roadside unit and inserts coins in the slots provided, a supply of gasoline or oil is measured out according to the amount of money inserted.
AN EASY way to distribute fertilizer through a lawn, flower bed, or vegetable plot is to blow it into the ground by means of a novel compressed-air apparatus. Used to insure luxuriant growth in Westlake Park, in Los Angeles, Calif., the system is applicable to smaller areas around homes.
HOUSED in a sturdy, compact wooden box, a handy and economical kit just placed on the market was designed to furnish the home owner with all the tools and supplies needed to perform practically any kind of repair job around the home. Only seventeen inches long, the portable unit contains pliers, a plane, folding rule, file, pipe wrench, hammer, saw with three removable blades, chisel, small vise, ratchet screw driver, and other useful tools.
A NEW tongue-and-groove edge now makes it easy to conceal the joints between adjacent panels of a well-known make of insulating wall board. The board edge has a tongue section at one end and a groove at the other. The board is nailed in place through the grooved end, and the tongue section of the adjoining panel slipped into place, the latter panel’s grooved end being in turn nailed fast.
INSTALLED as easily as an electric door bell, the household fire alarm shown below operates on four dry cells. Supersensitive thermostatic switches, installed where hazards are greatest, detect the first sign of a fire and cause the gong to sound.
Q.—WE HAVE an upstairs bedroom floor which has been used off and on for fourteen years, and the hard pine flooring has dried out, leaving cracks between the boards. How should these be filled in? Should they be filled before or after the floor is sanded?
MILE-A-MINUTE midgets, tiny racing cars that whirl at dizzying speeds at the end of wire cables or on special Lilliputian speedways, form the latest thrill sport of model makers. Hardly more than a year ago, the first races were held in California.
Three-Way Transparent Visor Is Snapped on Skiing Cap
FITTED to a new ski cap by snap buttons, an adjustable three-way visor of transparent material may be worn either close to the face or over eyeglasses. It also may be fastened out of the way, or detached entirely, when not in use. Tinted and colorless visors, both rimless for full visibility, may be interchanged.
A THREE-IN-ONE Clothes brush recently placed on the market serves a variety of useful purposes. An auxiliary tuft of extremely stiff bristles provides a means of removing spots from suede shoes. In addition, the handle is so shaped that it may be employed as a shoehorn, as shown below.
THROUGH a barrel as long as two city blocks, the novel “gun” shown below shoots concrete to line water tunnels at Monrovia, Calif. When a charging box on wheels has been “loaded” with two cubic yards of a fresh mix, an air compressor builds up 250 pounds pressure to the square inch.
BY CLEVERLY applying principles of chemistry and physics, a Texas inventor has developed a self-operating toy submarine. Placed in a tubful of water, it repeatedly rises to the surface and dives again, as if controlled by an unseen crew.
BORROWING an idea from industry, department and sporting-goods stores now offer heatproof gloves of asbestos for home and camping use. Fitted with rings for hanging near a fireplace, they save burned fingers in handling flaming logs and hot andirons, and are equally handy around camp fires and barbecues.
MAKING scale models of giant engineering projects with flat wooden toothpicks and household cement serving as the structural materials, is the unusual spare-time occupation of Dr. M. Russell Stein, a New York City dentist. Ably assisted by his wife, Dr. Stein transforms boxes of toothpicks into architectural masterpieces that are accurate models of their prototypes, practically perfect in every detail.
Dragging the Sea Bottom, Explorers Capture Weird Denizens of the Deep
ARTHUR A. STUART
DREDGING from a small motor launch for sea life in the Gulf of California recently, L. M. Paquette brought to the surface eighteen tiny apartment houses. Each consisted of a hinged yellow shell, the top shaped like a dome, the floor flat as a pancake.
NO LONGER need astronomers wait for a total eclipse to view the sun’s corona, or halo of glowing streamers, which usually is masked by the thousandfold brighter light of the sky. In a “coronavisor” perfected by the Bell Telephone Laboratories, a television camera spirally scans the area around the sun’s disk, and electrical filters discard all reception produced by the sky's uniform light.
A GIANT track-laying machine designed by T. Platov, a Soviet engineer, is now being used in the construction of new railway lines in Russia. Rolling on sections of track already laid, the device is coupled to flat cars on which are piled standard-length sections of rail already spiked to ties.
Secrets of Static Electricity Revealed in Car Tests
STATIC electricity in charges as high as 11,000 volts is often generated in automobiles that speed over concrete or asphalt roads. This is one of the interesting facts established by Prof. Robin Beach, of the Polytechnic Institute of Brooklyn, N. Y., who is conducting a comprehensive study to determine how static electricity is generated and released by cars.
PLUNGING earthward by parachute, Government flame fighters may soon reach otherwise inaccessible sections of a forest to snuff out beginning fires. This spectacular method of coping with a menace which brings an annual loss of more than $100,000,000 to Americans, was recently demonstrated successfully in forest areas near Wenatchee, Wash.
DRAPED over the knee like a miniature saddle, a manicuring aid recently introduced consists of a broad strip of soft woolen cloth fitted with convenient pockets that hold nail polish, cuticle remover, emery boards, orange sticks, and other manicuring accessories.
FOLLOWING in his father’s footsteps, Edward Sarnoff, son of David Sarnoff, president of the Radio Corporation of America, is managing an unusual broadcasting network. The system, installed at Brown University, Providence, R. I., where young Sarnoff is a sophomore, is similar to the wired-radio systems established in many major cities.
COMPLETE tools and materials for carving plastics are now available in kit form. Made in small and large styles, the kits include an electric hand-size power grinder and a complete set of quicklyattached cutting, polishing, and sanding wheels.
NUMBERED like football players, members of a British gun crew learn how to play the grim game of war. During a practice exercise, the numerals on their backs aid the instructor to coach each individual in his duties, so that perfect teamwork will result. The picture above shows gunners training “somewhere in England.”
FOR protecting valued trees against the rigors of winter, a new chemical treatment takes the place of burlap wrappings. The picture at left shows the protective compound being applied with a spray gun to a dogwood tree.
BY ROTATING its cover through a complete circle, the springless blade of a new “safetyfirst” pocket knife is locked open or shut. It cannot snap back on a finger, and need not even be touched to open or close it.
AN UNDERWATER picnic at which a diver hand-feeds a school of porpoises while at the bottom of an outdoor tank, is a novel stunt performed daily at an aquarium in Marineland, Fla. Dressed in full underwater regalia, the diver enters the tank carrying a wire basket full of small fish.
TWENTY-ONE rheostats, thirty-three switches, and six telegraph keys, mounted on half a dozen switch panels in between an array of voltmeters and ammeters, control an amazing Christmas-tree display developed by William C. Mulhausen, of Brooklyn, N. Y., over a period of fifteen years.
HERE'S your chance to earn some money to buy new tools or equipment for your hobby! POPULAR SCIENCE MONTHLY is offering $100 in prizes for the best letters from readers, telling what they like best in this issue, and why. Turn to "Our Readers Say" for details, and get your letter off at once.
PHOTOFLASH bulbs so tiny that more than two dozen can be carried in a coat pocket have just been introduced. With glass globes smaller than a golf ball, their improved efficiency is said to give them more light for their size than any existing type.
ATTENDANTS wearing roller skates make quick work of filling a motorist’s needs, at an Oklahoma service station. Practiced in performing all their duties on wheels, they fill a customer’s gas tank, check his water and oil, clean his windshield and windows, and send him on his way with a minimum of delay.
NO MATTER what you guessed to be the purpose of the windmill-shaped thing above, you’d probably be wrong. Actually, it’s the newest fashion in television transmitting antennas. Just completed for a broadcasting station at Los Angeles, Calif., the big aerial measures sixty feet long and will be mounted vertically.
How to get fleas from a grizzly bear might puzzle a less resourceful man than Walt Sutter of Tacoma, Wash. From a radio program he learned that a wealthy Englishwoman was in the market for grizzly-bear fleas, to complete a collection taken from various wild animals.
WHEN the first storm of winter sheathes the countryside in a soft blanket of snow, thousands of enthusiastic fans will dash for the nearest slope to test their skill on skis. But the odds are 100 to one that the great majority of them will find their muscles refusing to behave, and will roll out of bed the following day stiff as an oak plank and creaking in every joint.
AN OUTSTANDING feature of a model-airplane meet held recently in Philadelphia, Pa., was a diminutive “pickaback” combination plane inspired by the full-size composite aircraft tested for Transatlantic service in England (P.S.M., Jan. ’38, p. 30).
DESIGNED for children’s use in a nursery or playroom, a diminutive phonograph now on the market is operated by an electric motor and employs a novel sound box. This consists of a diaphragm resembling a loudspeaker cone and housed in the phonograph tone arm, whose unusual shape can be seen in the photograph at the left.
A TRAIN crash was arranged recently to celebrate the completion of 8,000,000 miles of travel by the Denver Zephyr, a streamline train of the Burlington Route. Little damage was done, however, for the obstacle which the streamliner hit was a mammoth paper hoop.
COLLECTING pencils of all sizes, styles, and shapes is the odd hobby that occupies the spare time of B. D. Sumpter, of Topeka, Kans. Now numbering more than 7,000 individual items, coming from all parts of the world, the unusual collection includes more than 2,500 different mechanical pencils.
HEATING homes in January with the warmth of last summer’s sunshine —that is the exciting goal of research now under way at Cambridge, Mass. Not far from the Charles River, scientists of the Massachusetts Institute of Technology recently completed a white frame building, its sloping roof edged with a glistening battery of solar-heat traps.
Perhaps your job is not the kind That thrills you as you do it. But wherefore grumble? Why not find The cheerful angle to it? You have a sense of humor, give Yourself a break—employ it For, since you’ve got to work to live You might as well enjoy it.
WRENCH and screw driver are the only tools required to install a novel bicycle gasoline motor that drives a wheel 120 miles on a gallon of gas at speeds up to thirty miles an hour. Normal pedaling is not interfered with, since no structural changes are required.
PRESERVING old-time circus equipment in scale-model form is the unusual hobby of James F. Craven, retired Glendale, Calif., mechanical engineer. His outstanding reproduction, pictured below, is a model circus bandwagon, complete with an eight-horse team and a ten-piece band.
PRINTING special headlines to order on copies of a newspaper is the unusual sidewalk enterprise recently inaugurated in Hollywood by two Californians. Attracted by the novelty of the idea, passers-by pay twenty-five cents to have their names included in bold-type headlines of their own composing, which are set up and then run off on the portable curbside press.
NECKTIES will not slip nor slide off a novel hanger just placed on the market. Ties are draped over a metal rod held out from the hanger’s wooden back by two side arms. A second metal rod, which likewise may be used for neckties, snaps forward to hold the ties in place and prevent them from slipping off.
WHEN a horde of invading ants threatened to take over the Beverly Hills, Calif., home of Edgar Bergen, the well-known radio and screen ventriloquist retired to his home workshop and built a novel ant trap. The invention consists of a rectangular wooden base, beveled on the sides, and fitted with metal plates on the top and side edges. The plates, slightly separated from each other, are connected through a transformer to the house electric current, and a bit of honey is smoothed on the top to lure the insects.
IT WILL be three or four times as large as the world’s largest airplane of today. It won’t have any body—its engines and its passenger accommodations will be in its wings, but its wing surface will be smaller, comparatively, than that of present-day planes.
BREAKING in stiff new shoes for persons with tender feet or for women who want to squeeze a size-eight foot into a size-six shoe, is one of the unique services performed by the operators of a New York City firm. A corps of girls takes on this unenviable task, while the proprietors busy themselves with other unusual requests of clients, such as filling a midnight call for a violinist to play a sick child to sleep, and first scouting around for and then purchasing two penguins as a present for a pet lover.
A ROBOT cardboard salesman that proves to customers that savings effected by a new mechanical ice box will actually pay for the machine, is now being used in refrigerator salesrooms. Placed in a slot in the card, pennies represent daily savings in operating cost, reduced food spoilage, and quantity buying, gained by substituting a new for an antiquated refrigerator.
FIFTEEN planes can be parked in the space ordinarily filled by five or six, by the use of the novel stacking method pictured above, employed in a hangar at the municipal airport at East Boston, Mass. Plane wheels are blocked and each craft is balanced on its nose with a wooden support protecting the propeller.
CONSTRUCTED of wood and cloth, and equipped with wheels and ground skids, dummy tanks are drawn across open terrain at a speed of twenty miles an hour to give practice to British antitank-gun crews. Pierced by numerous direct hits, a dummy tank is pictured at the left after practice.
PROBING the mysteries of cosmic rays, the strange and powerful radiations that bombard the earth from outer space, scientists have descended to subterranean tunnels and climbed to mountaintop laboratories in their efforts to ferret out the hidden secrets of the rays.
ALL the materials required to construct wooden models of old-time railroad locomotives are now available in kit form. In addition to wheels, stack, boiler, and other shaped parts, the kit includes supplies of sandpaper and glue. The model pictured at the left is the J. W. Bowker locomotive which was built in 1875 and played an active part in the Nevada mining boom of that time.
Six pairs of skis and ski poles can easily be carried on the running board of an automobile with an inexpensive carrier now available. Skis are placed at an angle with their heels on the running board near the rear fender and their tips facing forward over the front fender.
ACE AMATEUR STARGAZER STALKS COMETS WITH A NOVEL TELESCOPE MOUNT HE BUILT FOR HIMSELF
BELIEVED to be the only one of its kind in the world, a novel “merry-go-round” observatory has been designed and built by Leslie C. Peltier, of Delphos, Ohio. One of America’s foremost amateur astronomers, this thirty-nine-year-old observer has been showered with scientific honors for his discovery of a new star and seven new comets—including the great Peltier comet, brightest since Halley’s Comet in 1910—and his 50,000 observations of variable stars.
FOUR feet in diameter and more than five feet high, what is believed to be the largest chemist’s retort ever made was fashioned from a new plastic material for use in a current motion-picture scene. In the film, a magician “creates” a full-grown woman inside of what appears to be an empty glass retort. The scene is shown above.
SUPPLIES of food and drink can be protected from contamination by poison gas in case of wartime air raids by a novel and inexpensive device developed by M. Jaffe, a British inventor living in Liverpool. Food is placed on a raised wire platform and covered by an inverted mixing bowl, bread box, roasting pan, or other nonporous kitchen utensil.
AS A MEANS of protection against tank attacks across open terrain, German military authorities are reported to have constructed a series of sunken, antitankgun nests in flat areas along their western frontier. The tops of the pits are camouflaged with a cover of brush and leaves, as shown above, so that enemy tanks will be lured unsuspectingly within effective gun range.
SELF-CLEANING properties are attributed to a novel new comb which has specially designed teeth that extend on one side of the comb nearly to the back edge, as shown in the magnifying-glass photograph above. In addition, the makers claim that the comb tends to curl straight hair and to increase the life of permanent waves.
FLAVORING growing melons with port wine and cognac is the novel horticultural experiment being tried on the Yonkers, N.Y., estate of Samuel Untermeyer, New York lawyer. Bottles of the beverages used are held in a tipped position by wire frames stuck into the ground near the melon vines.
TEN acres of waste land, on the outskirts of a small New England village, have become the scene of a singular mining boom. With a hand cultivator, a barnyard conveyor, and machinery run by a discarded automobile engine, David M. Perkins, of Center Barnstead, N. H., has excavated more than 200 tons of “pay dirt” from the spot.
MEN’S shops in London are now stocking a new line of merchandise for sale to customers who want special protection during possible enemy air raids. In their clothing departments, the stores are offering bulletproof waistcoats, or vests, in all sizes and in a wide variety of styles.
A BOOKLESS library that is stated to be the largest of its kind in the world is maintained at the University of Kansas, at Lawrence. Instead of books, the library contains prints of old motion-picture films. In the photograph at the left, Fred Montgomery, who is in charge of the collection, is shown looking over part of a recent shipment of 250,000 feet of film.
MADE of a suedelike material, a new bottle protector was designed especially for travelers. Built for medicine and cosmetic containers, the bottle bag has a perforated lining filled with absorbent gauze and cotton, which not only cushions the bottle to prevent breakage, but also soaks up any liquid that may leak out while the bottle is packed away.
SHELLS fired from the big guns of a British battleship during gunnery practice off Portsmouth, England, not long ago, were caught by a camera just as they left the gun muzzles, as shown in the remarkable photograph reproduced above. One shell is visible at the center right of the picture, and another at the top right.
CATTLE are given special heat treatments for the cure of various ills by means of an electric-therapy machine developed for animal use by Dr. E. D. Hildreth, professor of bacteriology at Ohio State University at Columbus. Plugged into an electric outlet, the apparatus creates short-wave radiations which are passed through an ailing part of the animal’s body.
PIGEONS on the wing instantly killed by death rays from a machine four miles away—that is the feat reputedly accomplished by a deadly apparatus developed by Dr. Antonio Longoria, of Cleveland, Ohio, who recently announced that he had deliberately destroyed the lethal machine for the good of humanity.
LIGHT enough to be carried by one man, a portable filter outfit recently introduced is designed to insure a clean, clear, and uncontaminated supply of water to woodsmen, surveyors, explorers, and other groups who must rely on water of unknown quality.
GREATER sailboat speeds may be possible by rounding the deck edges of the craft, according to novel wind tests made at the Case School of Applied Science, Cleveland, Ohio. Controlled streams of air, made visible by the introduction of smoke, showed that rounded deck edges directed more wind into the sails.
HELD in place by tiny wire loops that resemble hairpins, a visor developed by a California ski enthusiast is easily attached to the peak of a ski cap. Made of a green celluloid material, the visor not only affords protection from the glaring rays of the sun, but when pulled down, prevents wind from rushing directly into the eyes of a skier as he travels downhill at top speed.
BICYCLE riders will have no trouble in making their way up in the world if they construct a stilt bicycle like the odd one pictured below. Built by Bryant Guthrie, a telegraph messenger boy, the odd vehicle was made from the frame of an old bicycle and lengths of pipe welded together at the joints.
NAIL FILE, knife, and a key blank that can be cut to fit any lock, are combined into a single pocket unit now on the market. The key slips into one end of the knife, one blade of which serves as a nail file as illustrated in the picture at left. WHAT did you like best in this issue of POPULAR SCIENCE MONTHLY?
CADET RICK JONES LEARNS ABOUT NIGHT FLYING AND HAS HIS FIRST EXPERIENCE WITH THE "JEEP"
THE night was black and moonless, but as Flying Cadet Rick Jones sat at the dual controls of his sleek Army BT-9 monoplane, it looked to him as if he could reach up and pick a handful of stars right out of the clear Texas sky. His preliminary Air Corps training behind him, Rick was now a student at Randolph Field, the great university at which the U. S. Army prepares men to man its modern fighting planes.
DEPOSITORS in New York State savings banks have an average nest egg of $915. UNDER one street corner in New York City there are 560,000 telephone wires. ALABASTER is a kind of gypsum. KANGAROOS can scent a man at a distance of four miles. AVERAGE three-week-old babies can hang by their hands longer than average thirtyyear-old parents.
CANARY birds kept as pets by one Englishwoman would be protected from gas attacks by means of a novel pushcart while she sought safety in a gasproof chamber. Air from a pump operated by one wheel of the cart enters the glass cage through a gas filter as the wheel turns.
PRESET by means of auxiliary filters and a special test candle that burns at a known “color temperature” to allow for any error in the color sensitivity of the user’s eyes, a new meter shows the photographer whether the artificial light for color pictures is correct for the color film he is using.
DESIGNED especially for making contact prints from miniature negatives, a new printing frame comes supplied with a 7½watt lamp in a housing that fits snugly over the frame for making the exposure. Inserting the negatives and the film in the frame is accomplished easily, and a convenient switch operates the light.
SERVING either as a cane for the strolling photographer, or as a tripod for the picturemaking stroller, the combination accessory shown in the photographs at the left has just been introduced. Made of telescoping steel sections hinged at the top, the three legs form a sturdy camera support when spread apart and extended.
EQUIPPED with a set of extension tubes and lenses and a ground-glass for focusing, the miniature-camera copying stand at the right makes it easy to photograph small objects or flat work at close range. A wooden baseboard supports a vertical tube which holds the camera by an adjustable arm.
FOR developing single pieces of cut film or film from a pack when it is not desired to use a tank, the stainless-steel-wire holder shown above holds the film safely by the edges and prevents contact of any part of the film with the tray. It is available for several sizes of films.
LAMINATED cardboard pages that fit into loose-leaf binders for storing two-by-twoinch mounted transparencies offer a novel filing system for your miniature films. Each panel holds twelve transparencies firmly sandwiched between heavy paper-board frames open both front and back for quick viewing and selection for projecting.
HANK MONK shoved his old Concord stagecoach from Hangtown, Calif., across the mountains to Virginia City, Nev., and Bill Cody lashed his horses between Leavenworth, Kans., and North Platte, Nebr., little thinking that future generations would gaze with admiration upon their bullet-riddled, six-horse mud wagons.
You Can Find Out for Yourself Using the Simple Methods That Set Jack Fletcher Up in His Own Remarkable Business of Advising Automobile Buyers
JOHN EDWIN HOGG
IN 1933, Jack Fletcher, a Los Angeles, Calif., automobile mechanic, was earning little or no money at his trade. Today, he is the proprietor of a thriving business that helps his customers get their money’s worth when they buy a used car. How did it happen?
AN AIR-CONDITIONED stone palace, complete with private airport, is the home of a California prospector who built it all with his own hands, at no cost save his own labor and a little dynamite. Jobless, in 1931 Frank Critzer came to the desert 100 miles southeast of Los Angeles on a prospecting trip.
If you can give the correct replies to sixteen of the brain teasers below, you've started out the New Year with a bang! To check up on your knowledge, turn to the answers on page 244 1 International law originally extended a country’s sovereignty just three miles to sea, because (a) it was the greatest distance at which a vessel’s flag could be recognized (b) a strong man could swim that far out and back (c) cannon of that time could shoot no farther.
A Customer's Car with a Bad Case of "Static" Has Gus Hopping for Awhile, But He Cures It with a Lead Pencil
JOE CLARK came out of the Model Garage office and into the shop looking worried. “What’s biting you?” Gus Wilson demanded after he had taken a look at his partner’s face. “Are we headed for bankruptcy, or is it just something that you ate for breakfast?”
SMOOTH riding and absolute safety at high speeds characterize this new 13½ round-bottom outboard runabout. Well adapted to both rough and smooth water, it may be used efficiently with any outboard motor of from 1 to 60 h. p. —a power range that can be achieved only with a round-bottom design.
VERY small, delicate designs can be jigsawed from veneer for inlaying if a thin plywood backing is first glued to each side with pieces of heavy paper or cardboard glued between. After being sawed, the veneer can be separated by slicing gently through the paper. Several identical pieces can be cut at one time by this method.
THERE are countless different types of wrenches on the market, yet a new style or idea develops every now and then. Recently the writer made up a set of six standard-size wrenches of the type shown, as well as a notched drift to drive them. These wrenches can be used where a nut is hard to get at and are particularly useful for starting stubborn NUTS.
REMINISCENT of India’s famous rope trick, this smoking stand appears to be supported by a piece of rope. The base is made of two pieces of ½" by 1" oak, 15" long, fastened with a cross-lap joint. The tray support is of the same material and construction, but only 8" long.
AN ARCHER in Lincoln green stands proudly beside his target on this novel canape tray. The picks are his arrows, grouped around the golden bullseye. Any well-figured hardwood is suitable for the tray. Red gum, which requires no filler, is handsome when finished with, clear varnish or lacquer, and was used for the tray illustrated.
WHEN a few beads or other duplicate contours are required in turning wooden furniture spindles, time can be saved by utilizing a standard threetoothed shaper cutter. Mount the cutter at the end of a wooden handle by means of two pieces of strap iron and three bolts, as illustrated.
AFTER an electric soldering iron has been in use for some time, the tip becomes corroded. To prevent this, dust ordinary graphite or plumbago in finely powdered form over the threads inside the copper tip each time the latter is changed.
MORE even pressure can be applied to the oilstone while sharpening ice skates if it is mounted as shown in a block of maple or other hardwood. Rout out the block so the stone will fit in tightly, and add two handles.
A SCREW driver for holding screws to be driven in tight corners can be made from a piece of ⅛" or 3/16" drill rod. This is slotted down the center with a thin hack-saw blade deep enough to make the top edges slightly flexible. The tip is then filed or ground concave as shown.
ALTHOUGH many methods of using an alarm clock to close a bedroom window in the early morning have been devised, one of the simplest is that illustrated. The window is adjusted to slide easily, and, if necessary, hot paraffin is applied to the runs.
CRAFTSMEN who make occasional drawings, as well as architects, engineers, and draftsmen, will appreciate the many features contained in this drawing box. A removable tray affords ample room for drawing instruments, and a compartment beneath keeps a supply of paper clean and flat.
WHEN the usual type of ski rack cannot be fastened on top of an auto, as in the case of a coupe or convertible model, carriers of the type illustrated at the left may be mounted at each end of the rear bumper. Each carrier will hold two pairs of skis.
FLAT work and turning are effectively combined in the construction of these bookshelves. The light-toned woods, maple, birch, or cherry, will give more satisfactory results than the dark woods. It will be noted that the ends and shelves are slightly less in thickness than the standard mill sizes.
Shoe-Polishing Cabinet Built into Wall to Save Space
THIS built-in cabinet holds shoe polish, liquids, and brushes and has a folding footrest of convenient height. The cabinet is designed to fit between ordinary studding, 16" from center to center. The bottom of the opening in the wall should be about 10" from the floor.
Small Leaf-and-Blossom Tray Hammered from Aluminum
ALUMINUM responds readily to the craftsman’s hammer, and anyone will be surprised at how little time and effort are required to make this useful and decorative double-deck leaf-and-blossom tray. The two trays are cut from 16-gauge soft sheet aluminum, and the hammering and shaping are done with the polished planishing end of a ball-peen hammer. Sketch pencil lines in to represent the veins. These should then be slightly raised by driving the metal down on each side of the lines, as illustrated.
IN TEACHING stars to nature groups, we had difficulty in using the star charts at night. A flash light was unhandy, so we cast about for another solution and finally hit upon luminous paint. The star dots and letters were traced with the paint.
1. Sand drawer sides, ends, inside bottom, and back faces glass smooth with No. 4/0 garnet paper. Dust out carefully. 2. Mix 1 part orange with 3 parts white shellac and reduce with 4 parts denatured alcohol. Pour this into an equal volume of shellac-mixing lac quer, if available.
HOW TO MAKE SWEET-TONED MUSICAL INSTRUMENTS AT A COST OF A FEW CENTS
PROBABLY the easiest and cheapest of all musical instruments to make is a bamboo shepherd’s pipe. It has a soft, sweet, flutelike tone that is pleasing in solos and especially delightful in trios or quartets. The making and playing of shepherds’ pipes is a hobby of growing popularity, not only among school children and Girl Scouts, but also among adults. In England there is an active organization known as the Pipers’ Guild, and the American National Branch of the Pipers’ Guild was recently organized in the United States under the direction of Miss Jennie Cossitt, musical director of the Union Settlement, New York City.
A SMALL electromagnet for loading freight on a model train may be made from materials which nearly every experimenter has lying around. The core is a shingle nail with the point cut off. A small washer, made from a disk of sheet metal the same size as the nailhead, is soldered on the nail 1" from the head.
BOY SCOUTS who wish to make something unusual in the form of neckerchief slides can do so by whittling them in the form of Indian finger masks from soft wood. These were symbols of secret societies or professions and were worn on the fingers during ceremonial dances.
ON SMALL chain hooks, which have no latch to keep the links from dropping out, a common crutch or chair tip will serve to keep them in place securely, as illustrated at the left. The tips may be obtained in several sizes to fit different hooks.
To REMOVE colored printing and designs from celluloid or plastic objects, such as advertising novelties, rub them with a cloth moistened with acetone or nail-polish remover, which is obtainable at drug stores. Then clean the surface with another cloth and a little alcohol.
A NEEDLE and several lengths of thread in popular shades can be kept in a mechanical pencil of the type shown at right for emergency mending when away from home facilities. The threads are braided together and folded as compactly as possible.
WHEN space permits, it is best to make an ironing-board closet slightly deeper than usual, as illustrated. The iron can then be left on its shelf at all times and does not have to be put away separately. Sheet asbestos should be tacked to the closet walls around the iron shelf to protect them from being scorched.
File-Card System FOR KEEPING A RECORD OF YOUR PHOTOGRAPHS
THE problem of recording exposure data systematically has troubled the amateur photographer for years. Memory cannot be trusted, and data scribbled on scraps of paper are often lost before being permanently written in a log book. The logs themselves are often inadequate and seldom contain sufficient space for all the information that should be preserved.
PROFESSIONAL effects can be obtained by the amateur movie cameraman if he has a homemade camera dolly or portable stand. He can then change from a general scene to a closeup without a break, or follow a moving person or object. The dolly illustrated may be folded venient carrying.
IN POORLY lighted interiors it is hard to get a sharp image on the ground glass. This can be made easier by attaching a small square of transparent cellulose tape to the middle of the glass, on the ground side. The glass becomes transparent at this point, and the clear image thus provided may be used in checking the focus.
WHEN only a few glossy prints are made at a time, cover the print roller with one or two thicknesses of blotting paper. It will then press the photographs into good contact with the ferrotype tin and remove excess water.
To MAKE novel photographic book ends of the type illustrated, first take pictures of the subjects pushing against a wall or the side of a car and enlarge to 5" by 7". These enlargements are mounted on ¼" thick plywood with glue or dry mounting tissue.
WHEN parts of a negative are to be blocked out temporarily, the opaque may be painted on the glass of either the printing frame or the negative holder as illustrated at the right. This saves the difficulty of washing the opaque from the negative; it can be wiped from the glass in an instant with a damp cloth when the printing is completed.
PHOTOGRAPHERS who use view cameras and do much of their work outdoors will find that a pocket sewed on either side of the focusing cloth will be convenient for temporarily placing film holders and other small accessories where they can be easily reached when needed.
Detachable Sling Strap Helps in Handling Large Camera
EVERY photographer who works with a bulky camera will find it advantageous to use a detachable sling strap. The one illustrated is heavy sole leather, 1" wide and 48" long, with a buckle adjustment for shortening it to 26" and with French dog-leash snaps at each end.
Lens Cap Attached to Camera by Means of Rubber Band
IT IS not necessary to search through various pockets of your clothes for the lens cap after using your camera if you attach it directly to the camera with a rubber band, as illustrated at the left. The cap will hang out of the way when not wanted, yet it is always ready to be immediately replaced over the lens when you have completed taking PICTURES.
The light must be flat and as even as possible. Because the eye can evaluate shadow density more easily than light intensity, it pays to hold a card as shown in the center of the location to be occupied by the print. Compare the shadows and arrange the lights till they balance.
TO SAVE the expense and trouble of using a large truck to deliver small orders of long pieces of lumber, a lumberyard fitted a folding rack on its pick-up delivery truck as illustrated above. Made of 2" by 4" material, the rack is bolted to the sides of the box body so that it rests extended on the open end-gate when in use and folds back on the floor compactly when not needed. In this way pieces 16' long, or even longer if the front of the load is weighted, may easily be carried
BY SCREWING a so-called “solderless connector” of the type commonly used in electrical work on the end of a short piece of wire solder, as shown above, you can hold the solder without incurring the danger of burning your fingers.
HERE is a simple means of protecting a pull-chain socket from being broken by an unusually hard pull on the string attached to the chain. I added a heavy rubber band or two between the chain and the string and they absorb sudden shocks. This idea can also be used for insulating a chain in damp places
As A GUARD against checks being raised, a protector can be made from a sharply knurled adjustment nut. A piece of rod is chosen to fit inside the nut and form the bearing, and the nut is mounted between two pieces of sheet metal, bent as shown and slipped into a handle.
Mahogany, walnut, maple, gum, or other cabinet wood may be used for this make-up chest, which is intended for a small bedroom or for occasional use when guests are entertained and an extra dressng table is needed. The mirror is fastened to the underside of the top, and a stay hinge is fitted to hold it at any desired angle.
FOR repair work in and about the house or farm, it is convenient to have a portable tool box with one or two shallow drawers or trays to hold small hand tools and the like. The drawings give dimensions for a small household tool kit. The two ends are band-sawed and dadoed ⅜" deep and ¾" wide to receive the tray bottom and drawer slide, both of which measure ¾" by 8" by 19½".
A STANDARD make of wind-operated battery charger gave trouble because rain entered the front bearing, causing rust. This was ended by cutting a hole in an empty coffee tin to fit the shaft and slipping the tin over the end of the generator.
RESEMBLING an upholstered chair, this sewing box consists of nine pieces of corrugated cardboard. Pad the back, arms, seat, and tiny pincushion with cotton batten and sachet powder, then cover with material to suit the taste. Attach pincushion to chair with pins or hold it in place with thread.
IF YOU have received the American Legion School Medal or any similar award, it may be attractively displayed in a reversible walnut or mahogany plaque of the type shown. The opening for the medal can be cut with an expansion bit, if available; otherwise it may be sawed out and accurately filed and sandpapered to a snug fit.
IN AN emergency a badly worn piece of typewriter carbon paper can be made usable by heating it over a radiator or a very low gas flame. The heat softens the ink and causes it to run together smoothly again, eliminating worn spots.
BY USING the giant dividers shown, one person can measure the acreage of a tract of land almost as fast as he can walk along two sides of it. The points are brought down each time at approximately the same distance from the fence or line of measurement.
EVERY home owner who uses a hot-air furnace will appreciate the 18-gauge sheetmetal visor shown above. It eliminates the smoke and dust streak on the wall above heat registers by directing the warm-air currents away from the wall and out farther into the ROOM.
FILING large, flat surfaces is easier if a wooden handle, taken from an old plane, is attached to the file. A hole is drilled in the tang of the file to take a stove bolt long enough to reach through the handle.
FOR inserting small brads in the back of a light picture frame, a pair of slip-jaw pliers are more convenient than a hammer. Open the pliers to the “wide” notch, hold the nail in position with the other hand, and apply a firm, steady pressure.
SO-CALLED “Skagway scows” are fun-provoking snow coasters made without runners. The one illustrated above is of especially simple construction. The bottom may be either hard-pressed composition board ⅛" thick or a piece of galvanized iron.
Dull or damaged auger bits may be sharpened with a small flat file or an auger-bit file. The spurs are the vertical cutting edges which score the circle before the horizontal cutting edges, called the lips, cut into the wood. 1. Hold the bit against the edge of the bench with the cutting end above it and file the spurs on the inside until a fine burr is formed.
ONE of the objections to mounting photographs in cardboard folders with easel backs is that a gust of wind easily causes them to slide to the floor when placed on a polished piano top or table. Give the bottom of each folder a coat of ordinary rubber cement and the trouble is overcome, because the cement provides a nonslip surface which is not harmful to the furniture.
FOR boring holes by hand to a certain definite depth, simply screw the bit or drill into a cork. This will act as a firm depth gauge. Corks of various sizes can be used for different bits and drills. It pays to keep several in the tool box.
DRAWINGS and diagrams can be traced on duplicator stencils by using a sheet of plain or ground glass taped in place over an opening in a piece of wall board. This is propped up over an inverted desk lamp as illustrated below. For permanent use, set the glass in flush with the surface of the wall board and tack reënforcing strips around the outside of the board and under the glass.
When wiring is to be done in conduit or thin-wall tubing, it is necessary to know the number of wires allowed in the various sizes of conduits. An attempt to use too many wires will cause difficulty in pulling them into place and may damage the insulation.
HOW TO DUPLICATE THE AMUSING LITTLE MODEL WALT DISNEY'S ANIMATORS USED
PINOCCHIO, the wistful puppet created by Geppetto, the wood carver, in Walt Disney’s second full-length production, is an inviting subject for either a homemade puppet or an amusing and companionable little doll. The accompanying illustrations show how to go about making one patterned after the original, which was created by the Disney model department as an inspiration to the animators drawing Pinocchio.
GEPPETTO, the indefatigable wood carver who made Pinocchio, filled his shop with all manner of unique cuckoo clocks. This one can be adapted to serve as a desk ornament. A hand-carved background of rushes supports a dollar watch, and in the foreground is a painted pool with a pair of ducks, one of them “headin’ south.
Workshop Clubs Increase Activities as New Year Begins
Workshop Clubs Increase Activities as New Year Begins
INTENT on getting the most out of their hobby, thousands of amateur craftsmen throughout the United States and Canada are participating in a variety of interesting programs arranged by their local home workshop clubs. Reports to the National Homeworkshop Guild from club secretaries indicate that more activity is taking place at present than ever before.
...WOODWORKING, DECORATIVE METAL WORKING, AND FORGING
Edwin M. Love
THERE are many tools displayed in hardware stores besides those named in the previous home workshop list. Aren't some of them useful to the home mechanic? Many special tools are helpful in certain types of work. This is particularly true if no machines, or only one or two, are to be added to the equipment.
MANY who do hand weaving find that bobbin winding is a very tedious operation. An electric winder can easily be made, however, from a small polishing head costing less than a dollar, a steel or hardwood spindle turned as shown in the detail drawing above, a piece of ½" steel shaft 4" long to use in the polishing head, and a ½" coupling for connecting the spindle and the shaft.
IF THE “no splash” filter on the water faucet no longer delivers an even stream of water, this may be due to a clogging of the screen mesh with calcium and other salts from the water. To clean, cork one end of the filter and fill it with weak acetic acid (or strong vinegar) and let it stand for ten or fifteen minutes.
THIS extra-sensitive ice-fishing outfit, which is especially good for perch, consists of a board with a small cleat, an umbrella rib, a staple, and two small brads. A loop is tied in the line and slipped over the beaded end of the umbrella rib.
A TABLE-TENNIS table that takes very little room when dismantled may be made with iron pipe legs. It is more stable, yet the expense is only slightly more than for one with wooden legs or horses. Materials: 2 pc. 3-ply or 5-ply wood 4½' by 5', which is a standard size sold for this purpose; 8 pc. ½" pipe 27" long; 16—½" screw flanges; 48' of 1⅛ by 3" wood (two by fours may be used, but make the table heavier); 28' of ⅜" half-round molding; screws, 2 hook locks, paint, and plastic composition wood.
SHEETS of drawings and shop data are often protected in celluloid envelopes. When this is done, a good way of mounting the sheets for ready reference on the shop bulletin board is to use ring backs salvaged from old loose-leaf notebooks. These are mounted on the wall as shown.
THIS anchor-shaped lighting fixture is easy to make and may be hung on the wall at any place near an electric outlet. The anchor is scroll-sawed from ¾" wood of almost any common variety that will not readily warp. The two sections of the bracket are bent from ¾" by ⅛" band iron, or from 12-gauge brass, if preferred.
ORDINARY window shades of the type that hang outside the window casings can be cut down quite easily into narrower and neater looking “inside shades.” First, buy the required number of pairs of inside-shade brackets. Nail them to the inside window stops about 1" from the top.
PRESSING on the foot pedals keeps this swinging pony in motion. The harder it is pedaled, the higher it will swing. Cut the horse and seat from ¾" stock, preferably hardwood, and sand the edges round. The swinging support is made from three pieces of wood, as indicated, with a handle added.
AN OLD typewriter ribbon will serve as a substitute for a rubber-stamp pad in an emergency. Wrap several layers of the ribbon around a stout piece of cardboard cut to fit inside a small tin or cardboard box. When the stamp no longer gives a clear impression, the outer layer of ribbon can be removed to expose the next layer.
MANY of us can remember at least one expressive line to add to this old doggerel: A wonderful bird is the pelican, His beak holds more than his belican. It was with this in mind that these three poses of Pete the pelican were designed. All are composed of simple lines.
A DINNER gong made from a piece of brass pipe has a rich, full tone that can be heard throughout the house, yet is pleasant to those who happen to be near it. A 3' length of 1" standard brass pipe, 15/16" outside diameter, is a good size. Iron pipe will not do.
LIGHT-DUTY electric soldering irons will remain hot longer after the current is turned off if a length of bare copper wire, No. 10 or larger, is wrapped tightly around the shell. They will also handle heavier work.
DISCHARGED .22 caliber cartridges may be used as hollow rivets for fastening leather work or cardboard together. The short, long, and long-rifle shells give an assortment of lengths. To spread the open end, drive in a center PUNCH.
TITLES for album pictures may be typed on heavy paper and neatly fastened with ordinary photograph-mounting corners. A cardboard mask made as below may be used for outlining each tag with a pencil before cutting it out.
ONE of the most graceful airplanes among the newer designs is the “Unitwin Vega.” This beautiful ship is made in two designs, the first a five-place model, the “Custom,” and the other a six-place “Starliner” intended for feeder airlines.
IF THE ground is suitable, a well can be bored by one man in a day with the outfit illustrated. The handle is removed from a standard well-digging auger, and a length of old ¾" or heavier pipe is attached. A chain is then looped around the pipe so that it can be raised and lowered with a block and tackle.
WHEN the three-jaw chuck of your lathe no longer turns dead true or the jaws become bell-mouthed and therefore grip long bar stock with the back of the jaws only, it is a simple matter to make up the accessories required for grinding the jaws flat and true.
TO CUT holes through brick walls by hand, a drill can be made by sawing a piece of pipe on a 45-deg. angle, then sharpening it on a grinding wheel or with a flat file as illustrated. Give this pipe drill about one sixth of a turn between each blow of the hammer.
FOR sawing tanks and other heavy materials where a hack-saw frame cannot follow the blade, a blade may be attached to an old or cheap handsaw. One end is brazed to the point of the handsaw, and the other end clamped as shown. First, however, the set of the teeth on the handsaw is removed by light hammering or grinding.
THIS quick-acting bench holdfast is adjustable for height and can be swung in a circle. It is held at the required height by tightening the knurled nut on the split chuck. Once set for a certain job, each piece can be clamped down or released in an instant by using the handle to compress the stiff coil spring.
A NARROW leather strip wound spirally around a hammer handle provides a neat, nonslipping grip. The groove can be filed in or made with an old 3/16" twist drill. Grind shoulders off the sides of the drill to leave a cutting edge and use it as shown.
ALTHOUGH any good glue can be used in the place of a regular padding compound for making scratch pads from scrap paper, better results can be obtained from the aluminum-colored cement commonly called “cold solder.” It dries in five minutes and is waterproof.
Release on Reel Regulates Length of Plumb-Bob Line
WHEN a plumb line is used frequently, this device, which is somewhat like a casting reel, greatly simplifies the lining up of all kinds of work. By working a release with the thumb, the plumb bob is allowed to drop for exactly the required distance.
RECORD-PLAYING attachments for use with a radio set are sometimes disappointing because of the objectionable surface noise of the needle. This can be muffled by making a box large enough to hold the player with room to spare for needles, plugs, and accessories.
MODEL makers will find this neat little plane gets right into corners and difficult places. It is made from a block of maple wood, a heavy single-edged razor blade, and a piece of nickel-plated brass. The underedge of the cap is filed off to fit the blade tightly.
A GAS furnace that will hold a No. 7 crucible can be built for about fifty cents exclusive of the burner. In this type of furnace, pewter, britannia metal, bronze, aluminum, and soft pottery glazes can easily be melted. From a painter obtain a 2½-gal.
A LIGHTWEIGHT pick-up for small articles that fall on the floor and roll under the workbench can be made as shown from a steel spring clip of the type sold in stationery stores, a short piece of soft wire, a small hinge, and two sticks. The main stick may be any length desired; it is then necessary that the wire be fastened so it is taut when the hinged handle is in an open position and the spring clip closed.
How to Do Workmanlike Knurling on Small Parts in the Lathe
KNURLING adds much to the appearance and usefulness of many small jobs. The knurling rollers in the tool shown are removable and can be replaced by rolls of finer or coarser pitch. In using a tool of this kind, both the work and the rolls should be well oiled.
IT IS sometimes necessary to enlarge the hole for the water-line connection in an old porcelain flush tank in order to install present-day fittings. This can be done, if a drill press is available, by using a tool turned from brass rod as shown.
LIGHTWEIGHT V-stands or plain blocking for shop purposes can be made from any available hardwood. The A-shaped type has a simple but efficient interlocking joint at the upper edge. The inverted-T stand is simpler, but note that the two vertical pieces of plank are arranged with the grain of one crossing the other.
IN A small plating plant or the finishing department of a factory that does not have the advantages of modern handling equipment, the task of moving heavy drums without rolling can be done with a drumhandling dolly constructed as shown below.
Abrasive—Fused alumina for materials of high tensile strength, silicon carbide for low tensile strength. Grain sise—Fine grain for hard and brittle materials, for small area of contact, and for fine finish; coarse grain for soft, ductile materials, for large area of contact, and for fast cutting.
THE lowliest pebble in your garden may prove to be a fairyland of color and gemlike shapes, if you subject it to the scrutiny of your magic lenses. Microscopic study of rocks is a highly important activity of science. Petrographers—scientists who work with rocks—would be lost without the microscope.
IN MOUNTING microscope specimens permanently in balsam on 1" by 3" slides, it often becomes a problem to hold the cover glasses down firmly while the balsam sets. Various clamps and other gadgets have been devised for doing this, but one of the simplest stunts is as follows: Obtain an assortment of lead weights in the form of short cylinders ½" to ⅝" in diameter.
MECHANIZED Armies Make Oil Supply Vital,” “Shortage of Fats Imperils Nation at War”—headlines like these spotlight what used to be routine items in a country’s shopping list, and give them new interest for home-laboratory experimenters.
GATES of the type shown above can be fastened securely for all ordinary purposes by placing sections of old tires opposite each other on gate and gatepost. The sections should fit snugly against each other and be painted to match the gate.
A CEMENT that will adhere to metals and other materials and will not become brittle upon aging may be made from an asphalticbase, bicycle-rim cement resembling tar, which may be found in most hardware stores. It should be thinned with cigarette-lighter fluid, high-test gasoline, or carbon tetrachloride, then brushed on both surfaces and allowed to dry for a minute before the parts are pressed together.
FOR drawing perfect ovals, a substitute for a draftsman’s trammel or ellipsograph can be made as shown below. The arm is a straight stick with a hole in one end for the pencil. At the other end two nails are driven through the wood so the points project slightly.
To MAKE a simple yet accurate depth gauge for the drill press, bend a pointer of piano wire, about 0.035" in diameter, for a spring fit around the pinion shaft as shown. Attach a 16-gauge aluminum plate to the front of the press so that the wire travels along one vertical edge.
EXTREMELY fine scroll-saw blades, such as are necessary for cutting jig-saw puzzles, are not essential for many other types of fine cutting, and, indeed, are not desirable because they break so readily. For example, I get excellent results by using medium blades such as Nos. 4 and 5 in cutting the small animals and birds I have described in articles in POPULAR SCIENCE MONTHLY.
TO LESSEN vibration and noise from a cooler fan, a section of tire casing was cut with a rip saw and four holes were drilled for bolting the motor to it. The side walls of the casing were then nailed to the edges of a board as shown above.
A LARGE reflector, such as is often used in making photographs indoors, can be converted into a small but efficient oven for articles that are to have a bakedenamel finish. Insert a 60-watt, or larger, lamp bulb in the reflector, then invert it over the enameled article.
TWENTY DOLLARS will build this powerful six-tube communications receiver, which includes all the more important features necessary for good all-around reception. Although only six tubes are used, two of these are dual-purpose tubes (the 6A8 which acts as a combined first detector and oscillator, and the 6Q7 which serves as the second detector and first audio amplifier) resulting in eight - tube performance.
MATERIALS for replacing any part or all parts of the volume-control unit of more than 400 different makes of radio receivers are contained in the handy kit at the right. Not only are variable resistors of various sizes and values included, but also assorted shafts, adapters, and couplings to fit practically every radio made.
WITH a built-in filing-card index, a new tester automatically adjusts itself to show the condition of any receiver tube. After a perforated card is placed in a slot, the tube is placed in the testing socket and a lever is pulled. This causes electrical contacts to be made through the card’s perforations and the tube’s condition is registered on a directreading meter.
EMPLOYING a novel principle of construction, a tiny air-spaced trimmer condenser of British design measures only 1" by ¾" at its base. Both the moving and fixed vanes are cut in the form of a continuous spiral. The fixed spiral is permanently fastened around a composition center post.
INSTEAD of being built as a single unit, a new two-unit radio-phonograph combination does additional duty as a pair of end tables for a sofa. In one table is an allwave receiver. In the other is a record-playing unit that literally broadcasts by radio the records it plays to the receiver in the other table, or to any other set located in the same room or elsewhere in the house.
REQUIRING SO little current that it would take 230 years to consume the total power stored in the batteries of a portable radio in which it is used, a neon-type pilot light that shows when the radio is turned on is a feature of a new battery-operated set.
FOR testing the quality and intensity of its transmitters’ signals in various regions, the Columbia Broadcasting System has equipped the sedan shown at the right with special apparatus that permits its engineers to make quick check-ups at any point that can be reached by car.
Striker Plate Adapts Latch to Overhead Garage Door
W. O. W.
A REGULATION door latch may be adapted for use on an overheadtype garage door by the simple expedient pictured in the photographs at the right. The metal section of the lock into which the latch bolt fits is fastened to the door jamb, and above this an easily made, curved striker plate shaped from 1½" by ⅛" steel is installed endwise, as pictured.
IF YOU find that you sometimes run your car with the choke button partially out, forgetting to push it in after a cold-weather start, try attaching a spiral spring between the carburetor choke arm and a convenient spot on the radiator shell.
BECAUSE I use the extra space in the rear of my garage for storing things, I have to know exactly where to stop my car when I back it in. A few rear-end bumps convinced me that I could not trust my sense of distance, so, with the car in the right position, I painted a vertical line on the side wall of the garage opposite my head as I sat in the driver’s seat.
IN SOME cars having a thermosiphon water-cooling system, a hot-water heater can be made to work by installing a water pump as shown above. I purchased a second-hand automobile water pump, removed the outlet and intake extensions, and welded the outlet pipe to the car-radiator intake pipe.
NAIL holes in a tire casing can be sealed with a strip of inner-tube rubber cut thin at the center and wider than the hole at the ends. Sanded and then saturated with rubber cement, the strip is pulled through the hole with a loop of thin wire, stretching it into place.
HOLES for hot-water car-heater connections can easily be made in radiator hose by pushing a piece of wood into the hose as shown above, and then drilling with a wood bit of the proper size. The wood should be thick enough that the bit tip will not penetrate the opposite side of the hose.
AN OLD bulb-operated hydrometer, or battery tester, makes a good spray gun to apply graphite for lubricating purposes to metal joints, locks, or hood webbing on a car. Remove the float and clean the battery tester with soda or some other alkaline agent to neutralize any acid that may remain.
To MAKE an emergency repair on a leaking radiator-hose connection, cut a long strip about an inch wide from an old inner tube, and wrap the strip in a spiral around the leaking section, applying some tension as you make the wrapping. Then wrap this spiral with adhesive tape, working back over the section in the opposite direction.
A MODERN toolmaker should have a pocketsize microscope of his own. It’s the only way to keep in step with the inspector. I don’t quite understand why some machine shops still rebabbitt certain machine-tool bearings every three or four weeks when a pair of radial-thrust ball bearings cost so little, compared to lost time and the setback in production.
AT GARAGES it is often possible to obtain discarded felt-backed car mats. After the worn spots have been cut out, there is usually a piece left that is large enough to throw on the floor in front of a lathe or other much-used machine. Such a mat is restful to a mechanic who is constantly on his feet.
WITH a ski jumper as the design, this little plaque makes an excellent gift for a sportloving friend. It can be sewn on the breast pocket of a ski suit and the name of a club added in small painted letters. In sewing, use bright colored thread to represent a belt.
IF A TEST tube is filled with water and covered with a piece of chamois skin as shown, it makes an excellent envelope moistener for office use. We had previously been using commercial moisteners consisting of a glass tube pinched at the end and fitted with a piece of felt.
FOR table-top photography, a substantial tilting support for the camera may be obtained by using the base of an electric fan. The camera is mounted with a piece cut and shaped as shown. A nickel or chromium-plated auto radiator shell, obtained at any junk yard, provides good material for this.
WHEN you lack a cut-film sheath to enable the film to be used in an ordinary metal holder, or if you wish to use a smaller size of film than usual in the holder, cut cardboard to fit the holder and slip two rubber bands over it. Any size film may be held under the bands.
WHEN a tank containing fixing solution is left uncovered, it rapidly accumulates a sludge of dust particles, which may cause spots on prints or films. To keep the hypo clear, provide the tank with an oiled-silk cover having an elastic band around the edge, such as those sold for slipping over dishes of food.
AMATEUR movie makers can easily make fade-ins and fade-outs by mounting the diaphragm from an old camera on a piece of band iron as shown below. A hole is drilled for the tripod screw to enable the device to be held firmly between the camera and the tripod top.