Just a few lines to tell you how PS arrived in time to save me close to $90. Last week my old Chrysler developed a fast oil consumption—30 miles to a quart—clouds of smoke from the exhaust. An estimate for new rings, etc., was $90, and the job was going to take several days.
Everybody has his own pet idea of some gadget he would like to see in general use. What is YOURS? Popular Science will pay $5.00 for each one published. Use government postcards only. Contributions cannot be acknowledged or returned. Vacuum brushes for bedsprings.
The man in the sport shirt was one of several who came forward for a private word after I had finished the talk before the local Air Force Reserve. He said, as many do, “I’ve got an idea. . People have some reason to be wary of other people’s ideas.
A racing chain pinii dcsigns a tuniicl-shap~d boat that looks like an invetstor's pipe dream&emdsh;but works
From Dump Trucks to Tunnel Ships
Alden P. Ariuagnac
BECAUSE an inquisitive exoerimenter sawed a boat in two, tomorrow's ocean voyagers may enjoy unprecedented speed and comfort aboard liners of new design. The man with the saw was Gar Wood, silver-haired king of American motorboat racing.
THIS huge machine “sculptures” aircraft wings with the accuracy of a jeweler’s lathe. Its job is to whittle off weight where the load in flight will be lowest. As much as 16 lb. are saved on each wing skin of an F-86 jet fighter. Operator at right manipulates an electronic switch panel and guides a pointer at his left along a pattern.
DOING an overhead painting or repair job need no longer be a balancing act. The platform step shown above is adjustable to fit any size ladder. Made of sturdy plywood, 7 by 11 inches, it is bolted to steel sides that slip over a ladder rung at any desired height and can be attached without the aid of tools.
CELLAR workshops or rumpus rooms can now be kept as dry as toast. The Frigidaire electric dehumidifier above prQtects lumber and equipment in a home wood-working shop. A fan draws the moist air over a series of cold coils, drying it by condensing the moisture into drops that drip into a drain.
WITH the aid of an isotope—radioactive iron—GE scientists are now studying how and where rust starts and how deep it goes. Radioactive iron in a solution is electroplated onto another metal. Placed against a photographic plate, this coated surface makes an X-ray exposure.
IT HAS always been back-breaking work to pick prune plums from the ground—and that set Albert Aff, Redwood City, Calif., to thinking. Why not do it an easier way? Here’s what he came up with. The operator. lying face down on a cushioned bed. picks up the fruit, places it on a conveyer belt that empties into a bin on the machine.
MASS production has finally hit house roofs. At a big housing development in California, a 90-man crew applies 25 roofs a day with a fork lift and pallet system. Fork lifts remove pallet loads of asbestos roofing from trucks, carry them to each site, and hoist them to roof level—and a six-man crew rides right up to the rafters with them.
IF YOUR new house lacks a garage, a car port like the above can help make up for it. especially if your winters are mild. Shown is an aluminum awning made by Kool-Vent Metal Awning Corp., Pittsburgh. It is finished with a high-gloss enamel in either stripes or solid colors.
1 ’Chute to Break Fall. When this parachute nears the ground, its cargo automatically winds itself up the ropes, slowing the fall and cushioning the landing. It is triggered by a weighted rope dangling below the cargo. When this strikes the ground and goes slack, it releases compressed gas from a cartridge.
THE National Bureau of Standards has a brand-new tool for measuring and mapping magnetic fields. From it may come better radio and television and new knowledge about what makes metals magnetic. The tool is nothing but a shadow. This shadow is cast by a fine screen of non-magnetic wire on a photographic plate in an electron microscope.
A SINGLE fueling point under the fuselage of this North American four-jet B-45 feeds into all the plane’s internal tanks. The result is that whereas it used to take four hours for the Tornado to drink its fuel, the job now can be done in half an hour—and directly from a tank car at airfields.
TIlE motorist above is getting a clear view of both sides of the road as well as directly behind. It's done with five 2by 7-inch nonglare mirrors fitted into a metal frame at various angles to cover a 160° arc. The Wvd-Vue®, seen in place across the top of the windshield, is made by the Am-Ben Corp., Chicago.
WITH hands joined, Paul Holmes and Merle Larson, of California, show that they can almost reach across the 13 feet between wing tips of the tiny plane they designed and built without the assistance of aviation engineers. A few hours after it was assembled, Larson climbed into the cockpit for taxi tests.
To cut driver fatigue, new trucks are to have torque converters, huskier engines, and torsion-bar suspension.
Machines Cheaper Than Men
John F. Loosbrock
CLIMB in, settle yourself behind the steering wheel. Flip the starter switch on the dashboard. Don’t look for the choke— it’s an automatic one, under the hood. Your left foot will fumble for the clutch pedal until you realize it isn’t there.
A NEW low-cost 4-room home on which the down payment is as low as $350 and the monthly payments $37 is being made by the U. S. Steel Corp. Total cost of the house, including landscaped plot, is under $6,300. It contains two bedrooms. This plywood-panel prefab is being turned out in New Albany, Ind., at a rate of one every 20 minutes.
Even .000,000,000,000,03 ounce of radon gas is spotted by the measuring devices at right. They determine radon content—which tells how much radium is present, since radon is produced as radium decays—by measuring the radioactivity of samples in the metal cans.
EIGHT-ENGINED Bristol Brabazon I, the largest landplane in the world, is shown above taking off on a test flight in England. Her length of 177 feet compares with 110 feet for the Boeing Stratocruiser and 182/2 for Air Force’s 6-engine C-99 cargo plane.
THE white threads crawling from these porcelain bowls are 90,000-volt arcs. The display is a Westinghouse test of power-line insulators. They ride a conveyer under conductor rods from which electricity jumps to vertical electrodes, then flashes over the insulators themselves.
THE little red car on the end of every freight train is losing its familiar cupola. Instead, this new caboose has a bay window projecting from each side. Seated there, a trainman can see the doors of cars ahead, and the side windows slide open to let him signal the engineer.
WIND-BLOWN dust can play hob with an airplane engine when it’s stripped down for repairs. Mechanics at Fairfield-Suisun AF Base, Calif., solved the problem with this king-size windbreak. It is 12 ft. 8 in. square. A leather boot at each comer fits over a B-29 propeller tip.
ELIMINATION of those twin bogeymen of automobile braking—“fade” and loss of reserve— is claimed by the -Chrysler Corp. for its new disk brake. Other advantages listed are less pedal pressure and automatic wear takeup. “Fade” is what makes you have to press harder on the pedal when the linings get hot. Chrvsler savs its brakes won’t fade because disk brakes lose heat faster, and because the lining area is greater.
There's a lot of work for scientists on the ground before a Supersonic research laboratory is zoomed skyward.
Viking an Alcoholic
Andrew R. Boone
TO STEAL secrets from space, the Navy’s new Viking rockets hoist an automatic physics laboratory higher than any airplane has ever flown. A Viking makes only one flight and it’s in the air only a few minutes. But since it must make a complete report of what it finds, those few minutes involve months of arduous preparation.
THESE pictures show three of the mechanical food testers developed at the University of Maryland. They are used in research to help farmers and canners in thirteen Eastern states improve their methods. Another, not shown, determines the ripeness of fruit by measuring its color photoelectrically.
THE new three-engine Northrop C-125 below—the Raider—will replace Air Force gliders for establishing “air heads” and for Arctic rescues. Full-span flaps and reversible props let it operate from unimproved fields. It can carry 32 soldiers and their gear.
To speed expansion of telephone service, Australians are building automatic exchanges on an assembly line and sending them out on trailers, as shown below, to rural towns. As lines are strung they need only to be plugged to the exchange.
THIS new type of photographic enlarger uses an “integrating sphere” as a light source. The sphere, coated with a special, highly reflective white paint, encloses a “cold light” bulb. The paint catches its rays and re-reflects them until the light is evenly distributed.
THE pilot of an airplane who needs runway lights turned on for a landing at an untended airport can do it himself if the lighting system works like the one at the field in Bellflower, Calif. He needs only to press his regular communication microphone button seven times. On flash the lights.
WHEN a rear tire must be changed on this British car, you release a catch and the entire fender flips up out of the way. A counterweight holds it up until it’s pushed down and locked. The convertible body that carries the trick fender was built by Hooper & Co. for use on a Daimler chassis.
THIS Canadian-built Avro jet air liner is the British Commonwealth’s second jet transport announced recently. The other is the de Havilland Comet (PS, Oct. ’49, p. 152). The Avro is built to carry 36 to 40 passengers at 400 m.p.h. at a 30,000-ft. altitude on medium-range domestic routes.
THESE pictures show one of the biggest moving jobs in history. When oil was discovered in Edmonton, Canada, in 1947, a refinery was needed. It would have taken at least three years to build on.1. But at Whitehorse, nearly 1.500 miles to the north, stood an abandoned wartime refinery.
A NEW light-absorbing glass on the front of television tubes sharpens the pictures by soaking up room light instead ok reflecting it from the viewing screen. You can see the difference in the photo above. It shows the image on a tube surfaced with the new glass (right) alongside the image on a conventional tube receiving the same picture on the same type of set.
THE Coast Guard has adopted a rubber abandon-ship boat that one husky man can toss overboard. It weighs 186 lb., with survival gear, and folds into the 4-foot package shown at right. Pulling a rip cord unzips the cover and triggers gas cartridges that inflate it in 30 seconds to 14 feet long and 6 feet wide.
YOU’VE heard tell that when a test pilot flies at better than 600 miles an hour a lot of unhappy things happen to him. His head feels as if it were splitting, his vision gets blurred, he gasps for breath, and the ¿controls in his hands are as stiff as iron. It would maintain the glamor of test flying in this age of jets if all this were true.
HOISTING logs and heavy rolls of paper is easy for two new sets of steel fingers. In the forest (left), the toothed tongs above, controlled from the cab of a power shovel, lift logs with little damage to the bark. At the other end of the paper-making process (lower picture at left) curved fingers on the fork of a lift truck can hold two rolls of newsprint at a time.
THE 50,000-gallon water tower at left gives a new look to the landscape near Houston, Texas. It’s made of welded steel plates, cut and shaped so that the tank continues the outward sweep of the upper part of the supporting structure. A ladder inside the tower, alongside the single filling and delivery pipe, goes on up through a vertical shaft within the spherical section.
THIS schematic drawing shows what General Electric engineers expect to happen in their new nuclear reactor, planned both to produce power and breed more atomic fuel (PS, June ’49, p. 124). Zigzag lines mark the paths of neutrons emitted when atoms of the fissionable material are split.
BUILT to explore flight at high speeds, this swept-wing bullet is powered by two gasturbine engines. The Northrop X-4 is to continue U. S. Air Force research pioneered by the Bell rocket-powered X-l, first to outspeed sound. The small, 7,000-lb.
BRITAIN is not saying much about the Vickers Supermarine 510, shown above, except that it’s faster than sound. It is a research plane, powered by a Rolls-Royce Nene jet engine with a 5,500-lb. thrust. Unlike the X-4, at left, the Supermarine is designed for eventual service as a fast fighter.
IN UPPER New York State is a toy factory that would satisfy the most wistful dreams of childhood. Santa Claus lives just around the corner. Reindeer browse among white birch trees. A lollypop tree dispenses candy. There is a big iced white pole—the North Pole, of course.
THE voltage of an ordinary generator, seen at lower left, is multiplied 100 times by this merry-go-round device developed for research by General Electric. It works somewhat like a water wheel that develops power as its buckets fill with water.
THIS sailor, sitting in a tub of ice water, is trying out a new flying suit designed to protect pilots who may have to bail out into arctic waters. He is Navy Corpsman Melvin Maki, and the survival suit he’s wearing is made of poplin and nylon.
FLOATPLANES are often built at landlocked factories. This presents a take-off problem in the delivery flight. De Havilland of Canada has found the solution in a wheeled cart on which the seaplane rides pickaback until it gains enough momentum to take off, as shown at lower left.
A COMBINATION of the old and the new is helping to solve the desperate housing shortage in the far North. From the outside, it looks like a traditional log cabin. Actually it is a completely prefabricated home, designed on a four-foot module.
Portable Bandsaw. Weighing only 30 lb., this combination bandsaw and shaper is a cinch to carry to the job. Double pulleys give blade speeds of 700 or 2,400 feet per minute. Unsnapping the two-part table top gives you access to the belt. The shaper attachment, at the right-hand corner, uses rotary files to cut sharp contours. Guard, top, and case are heavy-gauge steel, welded and reinforced. A sheet-metal partition in the case keeps chips out of the motor. Maker is H. & S. Machine Co., Methuen, Mass.
H. & S. Machine Co.
Iron Holds Proper Heat
Iron Holds Proper Heat. Big feature of this 6-oz., quick-heating soldering iron is that it can’t overheat. When the fastheating portion of the coil has brought the tip to the right temperature, a bucking coil cuts down the current and holds the heat at that point until the juice is cut off. Instant Tool Corp., Binghamton, N. Y., is the maker.
H. & S. Machine Co.
Mikro Marker®, made by Metal Items, Racine, Wis., is a height gauge that reads like a micrometer. Readings run from zero to 1", graduated by thousandths. Priced at $12, it’s compact, easy to handle, and is convenient for working in restricted areas.
H. & S. Machine Co.
Vise Holds Small Parts
Vise Holds Small Parts. Made by Metal Items, Racine, Wis., the Mikro-Vise® consists of a vise and a fixture. The 1⅛" wide jaws open to 1¼". Two Vs hold round stock, and insert pins are included to grip odd-shaped parts. The fixture can be set at various angles for milling, drilling, grinding, and shaping small parts.
H. & S. Machine Co.
Circular Saw Has Tilt Arbor.
The ball-bearing arbor, not the table, of the Power King 3001® tilts to 45c. Adding two low-cost extensions enlarges the 12" by 16" table to 16" by 25½", with 7-AMP;AMP;#X215B;" working space ahead of the blade. The price, $39.50 less motor, includes blade, fence, miter gauge, guard, splitter, motor pulley, V belt, and motor rail. Atlas Press Co., Kalamazoo, Mich., makes the saw. Maximum depth of cut is 2¼". The fence has clamp locks at each end and can be quickly removed.
YOU’LL be able to trim your Christmas tree this year with “snow” that looks and feels like the real thing and even goes it one better—it doesn’t melt. Made of snow-white polystyrene plastic, it is about 97 percent and actually has a texture like snow.
The Beaver, new half-ton truck with wings, can land on or take off from anything bigger than a puddle.
WHERE the dirt roads end and the rivers flow north, the bush flier must be cabbie, mailman, freighter, ambulance driver, and Santa Claus. His customers are trappers, prospectors, fishermen, traders, Indians, and Eskimos. He hauls everything, from oil drums to pregnant women.
THIS new, mobile lift can push a 50,000pound bomb around like a toy. Recently demonstrated at Wichita, Kans., it raised the giant bomb above 12½ feet from the ground into the bomb bay of an Air Force bomber. Hydraulically operated, it is mounted on a wheeled carriage so it can be used to haul bombs from storage to waiting planes.
A BIG hill in downtown Los Angeles and a concrete tunnel under it are being broken up and carted away without a single blast of dynamite. The secret of this quiet demolition job is shown above: a small, hand-operated hydraulic cylinder that pushes out a row of tiny pistons along one side.
THIS combination light and adjustable-tilt easel (right) is the latest thing for photographers, artists, stamp collectors, jewelers, and other persons who must do close work. The light can be rotated to any position to insure even lighting at any angle of the easel.
THIS new Ski-Ladder® lets rescuers reach ice-accident victims without falling in themselves. Consisting of a 22-foot fire ladder fastened to outsize skis, it permits rescuers to straddle a hole in the ice and spreads their weight over a large area to prevent further breaking.
A WAFER-THIN quartz crystal in the plastic case atop the cabinet above has been used by GE to cook eggs, shatter glass, mix paint, boil water, churn butter, and homogenize milk—all by setting up sound waves beyond the range of human hearing.
FOR radio hobbyists who want to learn dot-dash communication, a new type of practice set has been developed that uses no vacuum tubes. A single 1/2-volt flashlight battery powers the set. Called the Duplex Practicode®, it has a 4-inch speaker, is nonradiating, and is completely portable.
“Edsac”—short for Electronic Delay Storage Automatic Calculator—is the name of Britain’s new automatic brain. It is the first of the giant mathematical machines (see PS, May ’49, p. 148) to “remember” by placing electric charges on a cathode-ray tube (center screen below).
A NEW kind of pants hanger that clamps from the inside out instead of from the outside in has been put on the market by a firm in Beverly Hills, Calif. Made of plated spring steel, it is known as the Hold-Tite Pants Hanger®. Instead of holding the garment by pressure and friction, the hanger is compressed to fit inside the cuffs.
A 28-year-old engineer studying stress es comes up with a brand-new machine that's easier to handle, safer to fly.
Taxiing Still Caused Trouble
AN ENGINEER with a king-size curiosJTJL ity has taken a lot of the jitters out of a helicopter. His curiosity was about the almost incredible stresses developed by the flailing blades. It has led him to come up with a rotor head—the thing the blades attach to—that tilts freely to every point of the compass.
IF YOU throw your weight around, you can make this toy elephant (above, right) walk. Each leg is connected to the body by an offcenter pivot arrangement. When your weight is shifted from the legs on one side of the animal, the pivot swings them forward.
TIRED of eating a cold meal every noon, Alva H. Privett, of Oakland, Calif., built a hot plate into his lunch box. A compartment in the bottom of the box contains a heating element that can be plugged into any 110115-volt, AC or DC socket. Other compartments hold a vacuum bottle and sandwiches.
IF YOU have to make hay while the hot sun shines, vyhy not bale it in air-conditioned comfort? This setup, devised by Herbert Hahn, Jefferson City, Mo., lets you do just that. A V belt operating off the baler mechanism runs a blower that pipes fresh air into sacks fitting over the heads of the men who run the baler.
Electronic researcher scans 60,000 bits of information per minute and takes pictures of those that interest you.
John F. Loosbrock
SUPPOSE you’re a scientist beginning a research program on penicillin. You’d like to check everything written on the subject so you won’t duplicate work that has been done. Just put a card with a lot of little holes in it into a machine, press a button, light your pipe, and relax.
A NEW fire-retarding paint that looks like thin varnish may soon be available for such indoor jobs as protecting basement ceilings and airplane interiors. Under heat it fluffs up like a toasted marshmallow, forming a spongy insulating layer more than an inch thick.
THIS electronic tester twists door knobs all day. If they do not slip on their shanks, they drop into the “accepted” box. If there is the slightest slippage, which would cause malfunctioning in use, an automatic gate flips the knob into the “reject” box.
SHOES that last 75 percent longer are predicted by tests of new impregnated sole leathers on the abrasion machine shown below. Researchers at the National Bureau of Standards found that leather impregnated with plastics or rubber showed much greater resistance to wear than untreated leathers.
EVERY day several University of Michigan students are taken for a ride. They don’t go anywhere or do anything — just sit. But they’re sitting in a fancy new device dubbed a “Seater Meter,” and when a thousand or so have sat out their “rides,” researchers hope to learn how automobiles can be better tailored to fit the collective anatomy of American motorists.
CALIFORNIA has set seagoing detectives on the mystery of the vanishing sardines. The state’s annual catch used to be 800,000 tons. In 1947-48, only 100,000 tons were taken. That means a loss of food and a loss of livelihood for a lot of fishermen and canners.
THIS new spring breaks all the behavior rules. The tighter you wind a clock ^spring, the harder the key turns. As you pull on a coil spring, it takes more and more force to stretch the coils? a given distance. But the Neg’ator® can be made to become weaker instead of stronger as its load increases.
Ancient craftsmanship teams up with modern mechanics in manufacture of plated silverware.
Dies Do Job
Don’t boil your plated or solid ware in a solution of a highly alkali soap in
George H. Waltz
THE next time you sit down to your dinner table, take a good look at the knife, fork, and spoon that bracket your plate. If they are silver-plated, you will be looking at the product of a unique blending of the deft handwork of master craftsmen and the mechanical magic of modern mass production.
A COMPACT unit clamped to the dashboard converts stop lights to flashing warning signals for use when you stop on a highway. Protect-O-Flash®, manufactured by United Accessories Corp., New York City, also may be connected to blink taillights or parking lamps.
OPERATING from a filling station’s air line, the Jiffy Oil Drainer® empties a crankcase through an ejector tube inserted in the dipstick or oil-filler opening. Faster service and less congestion at the pits or lifts are said to result. The unit, distributed by Allen-Sims of Miami, is priced at about $100.
WHEN the Safety Master Switch® is pulled, the battery is disconnected from a car’s electrical system—as if the battery were removed from the car. Fire and theft protection, and longer battery life, are advantages claimed. The switch, shown above, is mounted near the battery, preferably under the hood.
INSTALLED between the master cylinder and the wheel cylinders, Sharp Brake® acts as an emergency and auxiliary parking brake. After brakes are applied, the dashboard button is pulled out. This holds fluid in the lines, locking the brakes.
Even a lawyer can a wise guy when he wins too often. This case never went to trial, but Gus won a unanimous decision for Stan.
It’s the Carburetor, He Says
What the Meter Shows
A Little Bare Spot
LEMUEL GASKINS, lawyer and solid citizen, stood in his garage and stared at the engine of his car. “Hello,” called a voice from the doorway. It was Bill Witte, Lem’s neighbor. “Come in,” Lem answered. “Just returning the soldering iron I borrowed,” Bill said, stepping into the garage.
That’s the working philosophy of Leo Bertelsen, former race mechanic who rebuilds many fine cars of the past.
Duesenberg Is His Pet Project
SOME of the finest cars in the West are overhauled in an unpretentious one-man garage in San Francisco. The secret is the man who runs it, Leo Bertelsen. A mechanic’s mechanic, he has an unusual knack for rebuilding high-performance autos.
Every sidewalk superintendent from 7 to 70 hankers to get his hands on this job. Here are full directions for making it.
Andre C. Lampert
THAT baby bulldozer cavorting on the floor at the left performs all the maneuvers of the real thing. What’s more, it does them the same way. By working controls that correspond to the standard ones on a regular bulldozer, you can make it climb hills, dodge obstacles, bulldoze small objects, haul a load, and start, stop, back up, or turn on a dime.
INFRARED heating units, an ultraviolet germicidal lamp, and a blower simulate outdoor drying conditions in this unit, according to the maker, The Taylor Corp., Alliance, Ohio. Between washdays, the washing machine may be rolled into the cabinet for storage. Clothes being dried are hung on ware racks that slide out of the dryer for easy loading. Priced at about $130, the dryer operates on 120-volt, 60-cycle current. It draws 1,280 watts per hour. A timer switch automatically shuts down the unit.
LITTLE girls, like their mothers, can be pretty persistent when they want something. Judy, my seven-year-old daughter, wanted a baby walker for her dolls. And it had to be just like the ones she saw mothers wheeling along the sidewalks. She persisted, I gave in, and here’s the doll walker—a Christmas toy that’s a little different.
A SECTION of aluminum downspout makes an attractive and serviceable carrying case for all the fishing equipment shown in the photo. Close one end of the spout with a hardwood plug. Drive roundheaded brads through the aluminum and into the wood.
Everything connected with the mixer, including all its accessories, is rounded up in one unit.
JUST getting ready to use the electric mixer was a big production at our house. The routine went like this: Clear space for it on kitchen table. Locate mixer and accessories, usually piece by piece in six different cupboards. Set up mixer. Then discover mixer cord won’t reach outlet.
A COLONIAL spoon rack and salt box are combined in the design of this pipe holder and humidor. Cut the back from ¾" pine and the pipe rack from ½" stock. Glue and brad the rack to the back. The ¾" sides are 3" wide. Curve them from 3" high at the back to 2½" high at the front. Plane and sand the ¾" by 2½" by 8" front from a full thickness at the center to at each end.
YOU can make either of these marble games in an evening—and they’ll keep the kids out of mischief on stormy days. The photos above and below show you their dimensions, and here’s how each is played: Double-deck game (above) requires both skill and speed.
FOR a leisurely Sunday breakfast or a late snack, your wife can park this stove right on the dining table. It’s easy to make—a splendid Christmas giftand next summer, she’ll appreciate the little stove’s coolness. A regular stove puts out lots of wasted heat—heat that just warms the room.
YOUR youngsters will get as much fun out of using this desk as you will making it. I used doweled and edge-glued ¾" pine, though you may prefer the greater simplicity of plywood. Use a bandsaw or jigsaw to cut out the two desk sides and a circular saw to cut the rectangular top.
IF YOUR toy problems have you over a barrel, that barrel may be just what you need. This spirited pony, doll cradle, and toy bucket all started out as old nail kegs. To make the rocking horse, cut the head, rockers, and spreaders from 1" lumber— “packing-case pine” will do—according to the patterns shown.
THE BEST way to keep your dog off the furniture is to give him a bed of his own. This one’s de luxe—with springs and even the hollow a dog likes to make. Stretch screen-door springs across a box frame, as show’n above, and cover them with burlap and a cotton pad. Build up the sides with 2" by 2" strips of cotton padding. Then tack material over the top, leaving it a little slack so it will sink into the hollow when the dog lies down.
THIS new, all-purpose, portable electric tool gives you a choice of either rotary or reciprocating action at the touch of a control. Without attachments it can do such jobs as sawing, drilling, filing, honing, sanding, embossing, and burring.
A NEW solder offered by the Proved Products Mfg. Co., San Fernando, Calif., has such a low melting point that you can do small jobs with a match flame. It’s made in ribbon form ⅜" wide and contains flux. A 30" length costs 25 cents.
THE bright white spot you see when you turn off your TV set may cause a burnt spot on the tube face. A new magnetic yoke made by Clarostat Mfg. Co., Dover, N. H., bends the fading beam to keep the bright spot out of the picture area.
To MOVE milk cans from his barn to the pickup point at the highway, Paul Malyk, of Williamsfield, Ohio, adapted a railroad creeper to run on 1" pipe spiked to railroad ties. He feels the pipe track is better than regulation rails because the wheels easily cut off all snow and ice in winter.
ORDINARILY you must go into a stork act while using a foot scraper to clean mud or snow from your shoes. You stand first on one leg, then on the other, and there’s always the chance of a fall. The scraper shown gives you something to hang onto. This consists of a length of ½" pipe bent to a U shape and welded to the metal on either side of the scraper.
THE adapter above will enable you to play records of all speeds—33, 45, and 78 r.p.m.—on your present phonograph. Made by Carbonneau Industries, Grand Rapids, Mich., it slips over the spindle. Small drive wheels vary the speed ratio.
MAYBE this gun sight can’t make a mouse look like a moose—but it comes close. A twirl of the knurled ring the hunter is fingering instantly changes magnification from ½X to 4½X. The telescopic sight can be used with any number of rifles since it slips into a special mount made to fit most popular big game guns.
WHEN you’re gluing up wood, especially large, flat pieces, a small window-cleaning squeegee provides an excellent means of spreading the glue in a thin, even coat over the wood .—Herbert R. Pfister, The Bronx, X.Y.
A LONG way from the old-fashioned ear trumpet, this new hearing-aid microphone attracts no more attention than a wrist watch. And the Acousticon Wrist-Ear® is not only inconspicuous, but can pick up conversation behind the user. It is also convenient in making phone calls.
We were stuck for water when workmen shut off the supply at the main. Instead of toting pails of water from a neighbor’s house, I rigged up a system that put plenty of running water in our home. How? I hooked one end of our garden hose to a faucet. Then I changed the connection on the other end of the hose so my neighbor’s hose would fit it. When his hose was screwed to his faucet and the water turned on, the water flowed through the hoses and into the pipes in our house.—Leon L. Walters, Chicago.
BIG cathode-rav tubes for television receivers have always required deep cabinets to accommodate their length. A new 19" tube introduced by Du Mont Laboratories will fit into a much shallower cabinet. Only 21½" long, this tube is about 7" shorter than the old Du Mont tube of similar size.
THIN metal strapping of the type used on crates can be adapted to prevent house windows from rattling. Cut a Straight strip about 18" long. Double over one end for 1½" and drill or punch this section for two small flathead screws. Bend the rest of the length in a slightly wavy form, making each bend about 3" from the other.
YOU can turn a glove and an inexpensive pocket watch into a good-looking traveling clock. Folded in its leather case, it will pack safely into a briefcase or overnight bag, and even stay-at-homes will find it both handy and handsome on a night table or desk.
Look, One Hand! In a spot where there’s barely space for one hand, how can you tape a wire? Simple enough, says Harry Morse, Oakland, Calif. Tear off a piece, re-roll with the sticky side out, and wind on with the fingers of one hand. Filter Your Antifreeze.
A CIGAR box and two wooden coat hangers are all you need to make a cradle for your daughter’s doll. Simply remove the lid from the box and the wire hooks from the hangers. Then fasten the box onto the hangers with wire brads and glue, as shown at right.
Tissue Diffuses Print. A piece of tissue paper, cut to fit On the top condenser of a condenser enlarger, will produce a soft print, more flattering to the subject in the ease of portraits. Because the tissue holds back some of the light, it will be necessary to increase exposure time.—Virginia Hanson, Santa Monica, Calif.
Meter for Land Camera
Meter for Land Camera. A matchbox-size exposure meter for use with the print-a-minute Polaroid Land Camera (PS, Feb. ’49, p. 232) is being produced by General Electric. It is calibrated in numbers from 1 to 8 to correspond to the aperture settings on the camera. Film speeds are set by rotating the dial.
Stills from Movies
Stills from Movies. This new Federal enlarging camera (below) lets you make stills from movies without cutting the film. Just pull it through a slot to the frame you want, then push a button to print it as a negative on 127 roll film. A magnifying viewer enlarges the movie film to aid selection. The exposure light is built in. Made in two models, for 8-mm. and 16-mm. film, the unit sells for about $20.
New Graphic Is Versatile
New Graphic Is Versatile. This new 2/4 by 334 Century Graphic, for around $110, embodies many of the features of the more expensive Crown model. It’s equipped with a Graflex Trioptar f/4.5 coated lens in a Century synchronized shutter with speeds from 1/10 to 1/200 sec. It will take cut film and film packs. A special holder, shown at left below, that adapts it for roll film is available for $20 extra.
Glass Makes Table Tup. I have found that one of the best surfaces for photographic work is a sheet of tempered plate glass called Herculite®. Used as a table top, as below, it’s easily cleaned and lets you see needed items in the drawer below it. In the ¼" thickness, it supports considerable weight and withstands heavy blows. It can be ordered with polished edges.—John P. Arnold, Doylestown, Pa.
OLD sailors who build ship models inside of bottles have nothing on electrons. These busy particles put on a whole picture show inside a sealed glass bulb. What happens and why are shown on the next two pages. Most of the tubes and circuits in your TV receiver pipe “information” into the neck of the picture tube.
YOU can run a model steam engine on an air line, which is about as exciting as plugging in an electric motor. But when you use fire to boil water and let steam push the piston, you not only have a prime mover, but also a thrill that only the smell and spit of live steam can give.
Twin Clamps Aid Welding. When you have a welding or brazing job, it’s often difficult to keep the parts in position while you use the torch. But with this rig you can clamp the parts where you want them and have both hands free for your work. The base was salvaged from an auto junk yard.
GOOD boats, like almost everything else ’ these clays, come high. A new plank here and there, plus a complete paint job, will put most old skiffs in first-class shape. Winter’s a good time for such repairs, since small boats usually are stored during those months.
EVEN the messy job of stirring a gallon of paint becomes simple if you let your electric drill do the work. A paddle to fit the chuck can be made by adding a shaft to an impeller from an old kitchen mixer (top photo), or simply by twisting a loop in the end of a metal rod.
BOARDS for siding sometimes warp so that they won’t fit snugly when you come to nail them on. To overcome this you need only a C clamp and a lever (any strong bar). Fasten the C clamp to the joist about level with the board top. Using the clamp as a fulcrum, force the board down with the lever until it fits smoothly against the one beneath.
DON’T throw away scrap ends of brass tubing. A few minutes’ free-hand filing converts them into excellent plug cutters. Choose tubes for their inside diameters—a ½" tube cuts a plug to fit a ½" hole. Plugs ½" or bigger should be made in a lathe. Chuck the cutter, hold the wood against the tailstock pad, and feed into the cutter. Cut part way, then break the plugs out —Herbert R. Pfister, The Bronx, N. Y.
THE usual water float is missing from a new kind of sump pump. Instead it has a micro-switch operated by air pressure. Water rising in a tube compresses the air in the tube until it pushes in a flexible diaphragm that closes a switch to start the pump.
Insulated, leakproof, and draftproof, this Quonset hut eosts less than $10 —and your dog will love you for it.
NO NEED to let your dog shiver out in the eold this winter when you ean build him this insulated doghouse lor under $10. Warm and cozy, it ean also be towed easily from one spot to another on its two-by-four skid runners. WARXIXC: This ours for a small or medium-sized dog.
WHEN an abrasive polishing material is used to shine up a door plate, the surrounding paint is apt to get marred. To protect it, I cut out this metal shield. It fits snugly around the plate and can be held with one hand while you work with the other.
ICE forming along the lower edge of a low-pitched shingle roof sometimes causes water to leak into the house. As snow melts, the ice dams up the water, allowing it to seep under the shingles. This trouble can be overcome by placing a strip of roll roofing along the edge.
A LENGTH of cellulose tape stretched over settlement cracks in plastered walls Will show whether the cracks are continuing to open. Since the tape is inelastic, the slightest opening of the crack will brèak it.— R. Daily, Long Beach, Calif.
SHALLOW shelves in a closet or area next to the kitchen can give you a little extra room for storing canned goods. Since the rows are only onecan deep you’ll always be able to spot what you want at a glance. To make full use of the wall, space the shelves just far enough apart to fit cans of the most commonly used sizes.
WHEN bulbs of two wattages are used in a lamp to give dim or bright light, it’s always annoying to turn on one when you want the other. But if the lamp is the type that has pull-chain switches, you can tell them apart by lengthening one chain.
YOU'RE looking at one of my family's series of Christmas cards. Maybe you would like to start a similar series this year. I began making photographic cards for my customers while managing a store. We made the cards from stock or master neg-
LOWER Manhattan was recently the guinea pig for a new system of low-altitude aerial night photography. And although New Yorkers were disappointed in not getting the spectacular display of sky fireworks they had expected, Air Force technicians were highly pleased with the results.
Here’s a train that’s different—and fun for a craftsman to build.
EVERY rail fan in your neighborhoodeven the fellow who has every train, track, and switch that Lionel makes—will envy the boy who gets a sky train. Monorails have been used in Europe for years, holding down some of the toughest jobs in railroading — mountain and river jumps where surface rails are impractical.
ANY kitchen can use a few extra shelves— and they’re the perfect answer for those odd-shaped, what-to-put-in-them problem spaces. The stand shown here fits neatly beside a refrigerator, but you can change the size and shape to fit your own needs.
You can make these “fire-breathing” dragon candlesticks easily out of brass, copper, or aluminum sheet and Ys" rod. Form the legs and body from the rod, bent to shape as shown. File the tongue to a taper before coiling it and drill the rivet hole.
THE cold fact about home heating, the experts say, is that many people are paying for warmth they never feel. A lot of furnaces are operating far below their rated efficiency—either the fuel isn’t being burned completely, or all the heat isn’t being taken out of the gases before they escape up the flue.
No Cold Feet. Even heating from floor to ceiling is the object of this Coleman warmair recirculation system. Hot air from the furnace is forced through small ducts to blending units, installed in the walls or Safe Space Heater. In areas where gasoline, cleaning fluid, or gas are in the air, the element of an electric heater could cause an explosion.
YOUR children will have fun, and learn a bit of science too, with this homemade, motion-freezing stroboscope. With it, they’ll be able to read words on a rapidly revolving disk. A fan will seem to stand still—or turn backwards. Half of a neon or argon bulb will glow brightly while the other half is dark.
You can use miniature parts to produce this attractive 5-tube superhet job for kitchen entertainment.
Making the Templates
Two Controls Do the Job
Choose Miniature Parts
Controls at an Angle
The Weight of Light
YOU can brighten up your wife’s home workshop—the kitchen—with a little frying-pan art of your own. This radio in a skillet can be hung among other pots and pans as a decorative addition to her kitchen that will supply music, news, and soap operas —and sometimes remind her that it’s later than she thinks.
To PIERCE tiny holes to accurate depths in wood, leather, and similar materials, just replace the lead in an ordinary mechanical pencil with a sewing needle. Then you can easily adjust the length of the point.—Henry S. Galus, New Bedford, Mass.
HERE’S a neat trick for driving piles for a boat house or dock—and you don’t have to wait until spring to start work. When there’s a good freeze on the lake, simply chop holes in the ice where you want the piles to go and drive them through to the bottom, as shown below.
THIS new, all-glass dinghy may be an answer to the problem of making dinghies light and easy to handle yet strong and durable. Made of four plies of Fiberglas® impregnated with plastic, the six-foot-long, experimental craft was built by Sid Hall, California boat designer, aboard his small barge workshop at Sausalito.
HERE’S a simple trick for keeping inquisitive youngsters out of your tool drawers. Drill a hole through the bench top so it lines up just inside the back of the drawer. Reinforce the hole with washers and the drawer back with a plate as shown.
No CHANCE of drilling too deep or too shallow if you make this simple depth gauge for your hand drill. All it consists of is a 3" bolt held in a frame alongside the drill. By adjusting the length of the bolt, you can easily set the depth of the drill cut.
MADE by crushing slag to the size of fine gravel, this special grit is said to give better traction on snow or ice than sand or ashes. It does not absorb moisture and remains free-flowing at low temperatures. The J. P. Loomis Coal & Supply Co., Akron, O.
WITH this new kit, you can etch metal without using dangerous acid. It contains an etching agent so harmless that even children are said to be able to use it safely. You also get sample designs and a special knife for cutting your own designs in the tape that serves as a mask.
EVERY few years this massive earth ripper is used for deep plowing in California’s Imperial Valley to maintain productivity of the topsoil. Constructed on a Paul Bunyan scale, the moldboard is 6' high and 9' long. —Robert Daily, Long Beach, Calif.
SHOVEL beams from an old corn cultivator form the main parts of these sturdy steel sawhorses that were welded up in the shop of the John J. Fitzpatrick farm near New London, Iowa. Other pieces from the scrap pile were used for the cross and angle braces.
YEAR-ROUND weather protection is afforded by this tractor cab built of plywood and 1" lumber. The hinged windows can be opened from inside the cab by draw cords. On rainy days, a canvas curtain closes the rear.—Willis Hinkson, Mt. Pleasant, la.
THIS steel-bar pipe puller has a ring slightly larger than the pipe to be drawn up. Made from square stock, the ring edge bites the pipe with its straight edges. When the rope is slacked, the tool takes a new hold.—A. M. Wettach, Mt. Pleasant, la.
THIS attachment for the Mow-Master® rotary mower pulverizes leaves so finely that the particles scatter between the blades of grass like dust, leaving the lawn clean. This does away with the task of raking and burning leaves. The Propulsion Engine Corp.
THESE folding hangers, molded of Monsanto’s Lustron® plastic, will fit into your suitcase for traveling or may be stored out of the way if your closet gets too crowded. They are designed to fit both women’s and men’s clothing. Priced at $1.00 for three, the folding hangers are sold by Kingly Plastic Products Corp.
This GE kitchen squeezes stove, refrigerator, sink and storage cabinets into a unit 60 inches wide, 84 inches high, and 25 inches deep. The stove has three five-heat burners plus full-sized oven and broiler. The fourcu.-ft. refrigerator can freeze four pounds of ice cubes, has chiller tray for meat.
YOUR womenfolk won’t have to worry about mud-spattered stockings if they wear these plastic spats that zip over their ankles in rainy weather. Glamour Spats® come in all colors, have a neat container that slips over the handle of an umbrella, and fit all types of shoes.
THERE’LL be a welcome on the door mat the next rainy day if you use the new Rubber Roosts® to park your rubbers or boots. They are made of brown or green rubber with raised sides to protect the floor and deep corrugations to speed evaporation. Rubber Roost, St.
THIS machine prints addresses on envelopes from a paper tape that can be used 100 times. The tape, backed by special carbon paper, is first typed, then mounted on the addresser, carbon side down. When an envelope is placed on the machine, a roller coats its face with invisible printing fluid.
A STOREKEEPER can change an advertising message in a matter of seconds with this new display sign that has interchangeable neon letters. The letters in the sign plug like radio tubes into sockets, which are mounted on a double-tiered platform.
CUTOUTS that fit around the closed rings of a notebook keep this Vinylite® ruler from dropping out; yet it is easily inserted or re moved. Made by Plastilite Products Co., of Pawtucket, R. I., it is suitable for both pencil and ink rulings on flat or curved surfaces.
SLIPPING Junior's bottle into this washable travel case will keep his refreshment either hot or cooi several hours-thanks to the in sulation with which it is padded. At feeding time the bottle can be propped up in the holder attached to the case.
WHAT GIVES? Supervisory employes at the East Pittsburgh plant of Westinghouse can get the latest dope by dialing a code number on any handy intra-plant phone. A tape recorder talks off the latest company news and policy. TV HURT YOUR EYES?