Sir: For the past few months, I have been trying to find a very technical mistake in your magazine, so that my letter might be with those printed in the magazine. In the July, 1948 issue I found a mistake on page 86 ["The Inside Story of the New Ford"] in the picture on the lower right hand corner.
THIS is the month the kids go back to school. It's easy, now, to think of education as the business of youth. But if you think so, tune in the nearest quiz program. The answers to the simplest questions can make adult ignorance amusing. Yet it isn’t really funny that plenty of parents know less about geography than their children.
THIS is the TF-80C. Like its fighter counter-part, the F-80, it is fast, sleek, jet-propelled. But there is one important difference. The TF-80C is a two-seater! It’s a trainer-fighter (TF) —the Air Force’s first “jet” fully equipped for both instructor and student.
It’s is stones to the top of the web of steel forming the world’s largest marine oil rig. Mounted on a movable barge, the derrick speeds up drilling of underwater wells to a depth of 18,000 feet. Main advantage of the rig’s towering 186 feet is faster and easier handling of the 18,000 feet of drill pipe that can be accommodated in its racks.
"Octane overdrives" save high-test gas by giving engines peak power only when needed.
Lights Tell What’s Happening
Gives Pep When Needed
How Injector Can Be Used
Special Fluid Prevents Knocking
YOU’VE been wasting gas. No matter how lean your mixture or how gently you tap the throttle, part of your gasoline dollar has been dribbling uselessly out of your exhaust pipe. It’s not your fault. It’s simply that even the best auto engines now made don’t take full advantage of the fuel you feed them.
A “TENDEROMETER,” shown above, now takes the guesswork out of cooking peas for canning. It simply slices up a test batch with sharp knives and measures the force needed to cut through them. Patented by American Can Co., the tester has been made available, free of royalties, to commercial canners in the U. S. and Canada.
THIS 13-foot aluminum-alloy scaffold weighs less than the man standing on it. Locked together without bolts from 52to 64-lb. sections that fold flat for carrying, the structure can be rolled or anchored. Adding more sections permits quick assembly of towers up to 40 feet.
THIS is not a record player, but a new photometer that can measure 1/100,000,000 of the light from an auto headlamp. Its eye, a recently developed electron-multiplier phototube, also detects color differences too small to see. Designed for Ansco film research, the device may also be used to match colors in fabrics, paints, and dyes.
WESTERN UNION’S new Desk-Fax, above, puts telegraph service at your finger tips. A message, written on a waxed blank, is wrapped around the cylinder. As this turns, a stylus sends a series of electrical impulses whenever the writing breaks the wax.
THERE’S oil in them thar swamps of southern Louisiana, claimed experts of the Shell Oil Company. The problem was to get in the equipment to set up gravity meters, sensitive to less than 1/10,000,000 of the total power of gravity, that give clues to areas for new, much-needed oil reserves.
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. Wearproof Pivot Holes.
NEAR Ft. Sumner, N. M., the Army had a fine wartime gymnasium and nobody to use it. At Portales, 70 miles away, Eastern New Mexico College needed just such a building for workshops. Problem: how to move the frame structure—160 ft. long, 80 ft. wide, 30 ft. high—across a desert that didn’t even have a road most of the way.
ANYONE who has puzzled over weather maps in the daily newspapers will appreciate the simplicity of the one shown above. Devised by United Air Lines, this weather-at-a-glance map gives non-flying operational personnel a quick picture of flying conditions the country over for a 24-hour period.
Front end has a chrome bumper and stainless-steel radiator plate for glamor, but retains distinctive Jeep shape.
THE war-time Jeep now has a glamorous descendant—a sporty-looking convertible called the Jeepster. You have a choice of two colors, yellow with a black top or fire-wagon red with gray top. First announced some months ago (PS, Jan. '48, p. 126), the Jeepster now has been made a main production unit of Willys-Over-land.
B-29 delivers 29-foot craft that can carry 15 survivors of ditched plane 600 miles at 8 knots in heavy sea.
New Metal for Kitchenware
Balloon Rises 24.4 Miles
FOR nearly two years U. S. Air Forces researchers have been working on a way to boost the life insurance of long-range bomber crews that are forced to ditch their planes in ocean waters. Last month at their whopping Wright Field laboratories at Dayton, O., they demonstrated that they had it—a 15-man metal motorboat that can be dropped by parachute.
Simple, tiny amplifier for telephones, radio, and television utilizes “holes” in atoms of rare element.
New Element Heavy as Lead
FOR the first time since its invention 41 years ago, the vacuum tube that runs your radio, operates welding machines, counts beans, opens doors, and supports the $3,500,000,000 electronics industry, has a rival. It is a tiny, seemingly simple gadget called a transistor.
THE picture at right unveils the world’s champion pipe bender: a two-armed hydraulic giant that makes smooth curves in steel tubes big enough to walk through. Shown bending a 50-inch duct for a petroleum-cracking plant, it has handled 60-inch pipe.
THIS big tong, built like a Stillson wrench, was developed to speed the assembly of oil-well tubing. It is believed to be the fastest wrench ever made. Reversible simply by flopping it over, as shown at left below, it can be used to tighten or unscrew threaded pipe.
Latest electronic devices overcome barriers of language and distance in this complex United Nations system.
History Broadcast from Platters
UN Reaches Fourth of World Listeners
Technical Improvements Planned
MAYBE you live in Kansas. Or Sweden. Or Afghanistan. Yet no matter where your home, you can still hear what’s happening at United Nations meetings—and in your own language. The world’s most complex radio network, broadcasting in 23 different tongues 25 hours out of every 24 (thanks to overlapping programs) makes this possible.
SOUND waves are helping Navy scientists develop torpedoes that will go where they are aimed. These sounds, too high-pitched for the human ear, give a running account of the course and speed of test torpedoes. The Navy is using this data to design better controls.
THESE pictures show a new way to cast art figures, toys, and other small objects in plastic or hard rubber without special tools or mechanical equipment. The process, almost as easy as pouring water out of a glass, can be used commercially or just for fun.
LIKE a fighter flexing his muscles before a battle, giant Constitution transports are getting a chance to try out their "muscles" long before they will actually need them. These “muscles” are the complex hydraulic boosters that move the rudder, elevator, and ailerons and raise and lower the landing gear, multiplying the pilot’s force on the controls as much as 45 times.
A MAN-SIZED version of Junior’s water wings may soon be coming to the rescue of paratroopers downed at sea. Being tested by the Army, the wings fit under the arms (inset) and will support 300 pounds of man and equipment, keeping the wearer’s head well above water.
DRIVE a Ford tractor under a frame of bent tubing, fasten six bolts—and you have the power shovel shown at right. The frame, designed to increase the versatility of farm tractors, was demonstrated recently by Dear-born Motors at Clarkston, Mich.
TOYS, too, have entered the era of jetpropelled flight. Just like the real thing, the 9-inch rocket pictured above is powered by the thrust of compressed gas escaping from its tail. In flight, the midget missile shoots along a guide wire for 200 to 1,000 feet at speeds up to 125 m.p.h.
A SOLDIER wearing these sponge-rubber "snowshoes” to lighten his step has a 95-percent chance of crossing a mine field safely. Army engineers developed the new footgear at Ft. Belvoir, Va. Coverings of watertight fabric over their upper layers and rubber hoses strapped to the wearer's legs let the sponge-rubber pads "breathe" for resiliency when used to walk in water.
THOUGH easily lifted by a child, as you can see, this 8-pound ladder will support 1,000 pounds of working load. Its strength comes from the girder shape of the legs. The Featherweight, 10 feet tall, is entirely aluminum, except for rubber pads on the feet, steps, and shelf.
A NEW 10-foot Sylvania lighting unit, shielded at top and front by translucent plastic, provides both indirect illumination and direct light for reading in bed. Downward refraction of light by the plastic yields 15 foot-candles at book level.
STRIPS of laminated wood, serving as the frame of this new chair, are bent downward at the front corners and joined to form its front legs. This “Y” joint, shown in close-up, is said to double their strength by distributing the strain evenly in two directions.
Autogyros Get a Lift. With this takeoff device invented by H. F. Pitcairn, of Bryn Athyn, Pa., autogyros with unpowered rotors could take off straight up the way helicopters do. Compressed air, piped into the plane through a flexible hose, jets out through nozzles in the rotor, spinning the blades.
THE MAN who designed the flying-wing bomber has now completed plans for an air liner of the same size and shape. These drawings show how designer Jack Northrop sees it: a 172-foot wing that would stand 15 feet high and weigh 40 tons empty. Eighty passengers would ride in it, 100 m.p.h. faster—he figures—than in conventional air liners of the same weight and power.
A NEW era in motoring was foreshadowed by the exhibition recently in Birmingham, England, of the first gas-turbine engine designed for automobiles. Still in the early stages of development, the new turbine (PS, Aug. '48, p. 154) weighs about a third as much as a piston engine of the same power.
JET manufacturers are losing no time in developing peacetime models for the public’s use. First on the market is a baby pulse jet that weighs only 8¾ pounds yet develops a static thrust of 30 pounds—enough to send the motorbike above zooming along at better than 70 m.p.h.
You won’t find this camera out at the beach this summer snapping candids, but because of it, your own cameras will be getting better. Developed by Bausch and Lomb, it’s interested only in testing new lenses for other cameras. For the utmost in precision, film plane and lens board can be kept parallel to within 5/10,000 of an inch.
AT THE top of this page is a portrait of lead pellets leaving a shotgun at 954 m.p.h. They were snapped by an ordinary Speed Graphic camera in the studio of E. Baden Powell at Pasadena, Calif. The secret? It’s in the lighting, a flash 1,000 times brighter than outdoor sunlight.
His ancient skill aided by simple shop tools, a Navajo Indian craftsman fashions silver mountings for a turquoise bracelet. He buys the metal in sheets or as Mexican coins. Enough for each setting, weighed in a homemade balance scale, is melted over a gas burner and cast in a mold of wet sand.
To save space on a desk, this lamp has a radio built into its base. An RCA-licensed, four-tube superheterodyne, the radio has a selenium rectifier to take the place of a fifth tube. It operates on AC or DC. The lamp is 26 inches tall and made largely of brass.
Now you can tell by the colors on his sleeve whether a soldier is a combat man or a technician. The photographs above show the Army’s new color scheme for noncommissioned officers: gold stripes on a blue background for non-combat personnel, blue on gold for combat troops.
How much punishment can the blades of a jet engine take? To find out, Boeing engineers place test wheels in the spin pit at the bottom of the picture at right and whirl them at speeds up to 100,000 r.p.m. under temperatures as high as 1,750° F. When a wheel breaks, a tiny mercury flash lamp, shown being installed at right, is set off, making a 1/5,000,000-second photograph on film in an 8-by-l0 camera mounted above the pit.
You can see the fight, even though you are stalled in a traffic jam outside the gate, if you’re lucky enough to hop into this Chicago cab. The set is a Motorola table model, modified by a television engineer, and set beside the driver so that the 4½-by-6-inch screen is visible from the rear seat.
THE laws of science rule the nursery as well as the laboratory, and many a profound physical principle is dramatically demonstrated by a toy. Here are half a dozen in which Junior has gotten an assist from heavyweight thinkers like Archimedes and Sir Isaac Newton.
THE motorized bump shown above is part of Kaiser-Frazer's indoor proving ground for proposed changes in automobile design. Its whirling drums, set off center, spin the car wheels mounted above them and, at the same time, alternately shove one wheel up while letting the other drop.
THE picture below shows how GE’s oversize “medicine dropper” samples molten steel. Squeezing a rubber bulb on its upper end sucks liquid metal from a dipper into a tube of heat-resistant glass about the diameter of a lead pencil. The steel hardens in five minutes, and the glass is cracked away-leaving a smooth rod for analysis.
JUST flip the switch of the Tel-O-Aid when the phone rings—and you can talk, with both hands free and work uninterrupted. Both sides of the conversation can be heard anywhere in the room. The receiver rests on the cabinet, plugged into any outlet, but has no mechanical connection with it.
TO MAKE atomic energy easier to understand, this comic strip was prepared for an exhibit celebrating New York City’s Golden Anniversary. Artist Joe Musial was aided by Dr. John R. Dunning, Nobel prize winner and Columbia University science director; Dr. Louis Heil of Cooper Union; Dr. Maxwell L. Eidinoff, author of “Atomics for the Millions”; representatives of “Puck”; and a group of science journalists.
Visibility Increased. Two windows on top of the cabin plus a rear window make it easy to see out of this 1949 Silvaire Sedan even though it is a high-wing plane. The new Luscombe four-seater also features a luxurious interior, with individual cigarette lighters, ash trays, and freshair ventilators.
THE Army’s newest wind tunnel has a throat as flexible as your own. As a result, it can reproduce any air speed up to four times that of sound at the touch of a couple of push buttons. With it, engineers can test models of supersonic aircraft and guided missiles at continually varying velocities without stopping to change from one fixed throat to another.
Three out of a hundred 1948 buyers will get a masked marvel with invisible extra mileage built in.
Alden P. Armagnac
IF Lady Luck is smiling your way, the next time you buy a tire for your car, you’ll get more than you expected for your money. This year, something like three out of 100 purchasers are going to receive a surprise-package tire, and the next one may be you.
You have to look twice at the giant Foster trailer truck above to make sure it’s not a freight train. It’s 60 feet long and can haul a 50-ton load—more than the average railroad box car. For easy loading, the rear of the trailer tilts down, forming a ramp (right).
JUST hook this single-wheeled, handle-bar Pow-r-Wheel onto the dump barrow at left above, and you have a power barrow. Detach the barrow body from its two-wheeled chassis, put on the flat body at right above, and you now have a flat-bed truck for hauling cans or crates.
Your pilot on the two-decker will be a veteran, but there’ll be many surprises for you as a passenger.
Trouble Made to Order
Cruises Nearly 5 Miles Up
George H. Waltz
IT had been quite a flight. All that remained was for us to grope our way down through thick weather to an instrument landing at New York’s LaGuardia Field. Rough air had messed up our first approach, and we had gone around for another try. “Landing gear down,” called the pilot.
THIS mechanical ram speeds the packing of sand molds for steel castings. Cups on the rim of a wheel whirling at 1,800 r.p.m. scoop a ton of sand a minute from a conveyer and hurl it down into the molds. This spray packs them harder than can be done by hand or pneumatic ram. The machine is an improved model used by U. S. Steel.
THE humming electric shaver, second only to automobiles as a cause for argument among men, is nothing much more than a refined barber-shop hair clipper: a series of fixed slots to plow up the hair, a series of saw-edged blades to snip it off.
RADIO has come to the rescue of miners who face death when trapped by explosion or cave-in far underground. With a new portable battery set they can radio for help within seconds after disaster strikes. Developed by the U. S. Bureau of Mines, the new two-way communications system uses low-frequency radio waves to penetrate hundreds of feet underground.
YOU can’t expect to abuse a motorcycle battery and get away with it. In general, you should treat it like an automobile battery. But in some respects it’s a special case, requiring extra care. Make a habit of checking the specific gravity of each cell once a week.
Magnet Holds Small Parts. When you’re working under a car, hook a permanent magnet nearby. As you remove nuts, cotter keys, pins, or small parts, just stick them to the magnet. P. R. Wilson, of Brooklin, Ont., says this is a help when you replace the parts.
The curtain of time seemed to be a little frayed the day Gus got mixed up in the romance of old cars and young people.
A CHANCE remark of Joe Clark’s had set Gus Wilson to thinking about old times in what he still calls “the auto game.” Alone in the shop at four o'clock that day, he was still at it—his chair tilted comfortably, his feet on a parts box, and his gone-out pipe in his mouth.
ADAPTED from a successful aircraft brake, this new hydraulic automobile brake has fewer parts than the conventional type. A product of the Glenn L. Martin Company, it’s now undergoing extensive tests on cars. A continuous flexible ring seal fits in a groove in the brake shoe support.
A CONTROLLED fan offered by the Ford Motor Company runs only while the engine is warm. In cold weather, it seldom starts. Its heart is the Dynamatic Drive developed by the Eaton Mfg. Co., of Cleveland.
IN ORDER to give it plenty of elbow room, the Aids to Modern Living department has been moved from its usual place to pages 298 to 301 in the back advertising section. There more space will be available as needed to tell the story of ingenious new household products as they come on the market.
THESE decorative boxes introduce a couple of novel twists. They’re shaped with a bandsaw and given a textured finish with several coats of gesso paint. The basic steps are conventional. You assemble the stock into a closed box with nails and glue and later saw it apart to produce a perfectly fitting lid.
BEFORE you start work on this ornamental match-box case, here’s a warning. When your friends see it, they’ll probably force you into quantity production. But if you insist on going ahead, red cedar, walnut, or maple is excellent material for the base.
GAILY colored pottery, burnished aluminum, and gleaming plastic combine to make this casserole rack an attractive and useful addition to your table service. The dimensions are determined by the size of the dishes to be used. The casseroles I used to fit the rack shown here hold up to four servings each.
ONE feature of this tilt-top Chippendale table is its size. Dimensions are only about three-fourths those of the customary tilt-top. This reduction makes it good as an accessory piece in a room or apartment where space is at a premium. Either walnut or mahogany is suitable material.
BY CAREFUL shopping, I bought the parts for this combination lamp for less than $5. Simple to assemble, it calls only for common hand tools. Here’s what you’ll need to duplicate it: A small wooden salad bowl; a chromium-plated gooseneck 2' long; a lamp cord and plug; a nut to hold the gooseneck to base; and a chromium-plated socket, ceiling canopy, and reflector.
HERE’S a piece that looks as if it had been turned out by an old-time craftsman. Despite that, power tools will save you much of the labor needed to carve it out. Begin by gluing up a 4½" by 6½" by 16" block of redwood or pine. Lay out the outlines on the sides of the block and cut the profiles on the circular saw.
NOT too far in design from classic chess shapes, this set is unusual in that it is made entirely without a lathe. The square-based pieces are sawed and carved from Sculp-stone, a form of steatite sold for handicraft uses. Pleasing to the touch, this material is excellent for chessmen.
IF YOU'D like to try miniature internal carving of plastic, try cutting tools ground from phonograph needles. I developed these after making an unsuccessful search for really small cutters. I first ground three sides to the needle point, and then inserted the shank of the needle snugly into a hole drilled in the end of a 1" length of ⅛" steel.
Enclosures of the right kind disguise these ugly ducklings as useful pieces without stifling heat circulation.
WITH the end of warm weather in sight, this is the time to build radiator covers. But before deciding on a design, consider how the cover will affect the heating efficiency of the radiator. A properly designed and constructed enclosure will pay off in appearance plus a more comfortably heated room.
Pioneer Wood-Burner. Memories of diamond-stack engines, seen from his home when a boy, impelled Orrin W. Brusie, of Millerton, N. Y., to build this wooden scale model of the C. P. Huntington. The link hookup was changed slightly from plans in PS so that the reversing links are raised and lowered by a rod running back to the cab.
HERE’S an intriguing project for the craftsman who enjoys putting plastic through its paces. Columns are formed for these candlesticks by twisting three ¼" rods into a spiral at the center. This is accomplished with a simple jig. Lay out a 2" circle on a scrap of wood, divide the circumference into three equal parts, and at each point bore a ¼" hole on a slight inward slant.
With patience, know-how, and simple tools, you can do a workmanlike job of replacing loose or damaged tiles.
Joseph J. Moro-Lin
THREE things are important when you tackle a tile repair job: cleanliness, mortar of the right thickness, and patience. You can’t rush the work, especially if it’s your first attempt. Tiles may be loosened by settling of a building, or perhaps a wall must be opened to repair plumbing.
A short circuit can cause trouble, but I rigged one to save trouble. For an automatic stop on a magneto-type gas engine that pumps water in a distant pasture, I ran an insulated wire from the spark plug to the water tank. The wire ends near the top of the tank and the engine is grounded.
IF YOU’VE ever wasted time and patience untangling knots in a lengthy extension cord, you’ll appreciate this homemade portable reel. Just place it on the floor, plug in the 6' connecting cord, and walk away with the business end of the extension.
THE simple, two-piece gadget pictured at right will stop lots of splashing when dishes are rinsed. Make it of aluminum or other nonrusting sheet metal, forming a lock joint to connect the side and end. If necessary you can cut tabs to anchor them on the drainer.
THIS modern, transparent pipe rack—a useful ornament for your desk—is made entirely of 3/16" thermoplastic. Lay out the base first, and then cut the two pieces that are to hold the pipes. Before bending them, cut the niches, holes, and decorative grooves if desired.
I HAVE found that the adjustable fence shown above simplifies duplicate pattern sawing on a circular saw. It can quickly be mounted or detached, and it will take stock from ¼" to 2¼"; just invert it for the thicker work. Make the fence any convenient width and length, countersinking the woodscrews that hold the brackets to it.
There’s more than one way to swing a circle. Here’s how to do it on the bandsaw, jigsaw, shaper, or lathe.
Eduin M. Love
IT’S FARTHER around a disk than you think, as you often discover in cutting one with hand tools. Power tools are not only faster, but with jigs make precision a matter of course. Lazy Susans, lamp bases, and similar disk shapes are interesting chores for several power tools.
THERE’S a smile, plus a few evenings of fun, for whittlers in this novel letter opener. The croc’s tail is flattened and has sharp edges to slice envelopes open. The body is so shaped that it fits the hand nicely. Select a straight-grained wood that will both carve well and remain strong in thin sections.
DESIGNED for use on lathes with a l"-8 spindle thread, this new collet chuck has no projections to catch clothing or fingers or to damage tools. Work can be done from any angle and right up against the chuck without danger. Fully balanced for accuracy at high speeds, the chuck has a work capacity ranging from ½" to 2".
WHEN you have to turn a lot of identical small parts, this box-type tool holder does a perfect job. It easily handles work up to ½" in diameter. Special screws and pins, duplicate parts for models, rivets, and small gear blanks are some of the possibilities.
TIP breakage of centerdrills is less likely with this little hand-held chuck, because if the going gets tough, the chuck will simply turn between your fingers. It’s a big timesaver too; the centerdrill can be kept in the chuck, which is merely slipped over the tailstock center whenever you wish to use it.
IF YOU don’t have a big four-jaw chuck, you can still handle good-sized castings and irregular pieces. The setscrew studs in Fig. 1, for instance, work nicely on a faceplate. Two steel angles will hold square or rectangular pieces (Fig. 2).
Bar Bores Big Holes. Firmly held at both ends, this stationary boring bar makes through holes of any size between ¾" and 3". On a 10" lathe I’ve taken ⅜" at a pass. It works faster than a big drill. A plug turned to fit the spindle taper is driven in, with punch marks to insure that it can always be reinserted the same way.
SHOP tests by PS editors of a new small electromagnetic sander reveal that such tools may find uses in both the workshop and home. Though not suited for heavy cutting or large areas, they seem well adapted to the mediumand fine-grit work important to good finishing.
THESE magnifying glasses will give you close-up, detailed views of sports events and stage shows, but unlike binoculars, they needn’t be hand held—you just wear them like ordinary spectacles. They use inexpensive lenses, and can be made with just hand tools.
THIS pivoted holder keeps a soldering iron at low temperature, yet automatically switches it to full line voltage when the iron is withdrawn for use. The idling temperature is low enough to prevent pitting of the tip but high enough to permit rapid warmup.
MADE of inexpensive materials, this wood-burning pencil will operate in series with a 400-watt load or directly from a 6-volt storage battery. Twist together the leads and the resistance wire, and mold plaster of Paris around the head, leaving a small loop of wire as the point.
CHUCKED in a drill press, this revolving cutter solves the problem of making wheels for toys or models. Materials required are a piece of ½" steel rod, ⅛" steel plate 3" square, and a 1/16" twist drill. File one edge of the plate to the desired profile of the wheel.
HERE’S a simple jig that will enable model-plane enthusiasts to cut duplicate wing ribs accurately. The jig consists of a maple base block, a sheet-metal cutting guide, and a cleated push strip. At one end of the base block is a stop strip, its edge having the same curve as the guide.
ORDINARY exposure-test strips give you a series of different exposures of different sections of a negative. This ingenious little gadget does better: it provides a numbered series of exposures of the same section, permitting accurate comparisons.
Adapter Holds Flash Gun. Flash guns with T-slot mountings may be attached to the tripod socket of almost any camera with this adapter, which is made from a standard aluminum tripod screw. Turn the screw tightly into the tripod socket and scribe a line on it in the direction the gun is to be mounted, to insure proper alignment.
AN EVENING’S work plus $4 will give you a 35-mm. projector that plugs in anywhere, doesn’t heat up, and will enable you to see your color transparencies much enlarged. Although it can’t match a high-quality commercial projector, this simple one beats squinting through a viewer.
IF YOU don’t care for the pictures others take of you, drop in on Ray Jones. Buying a bomb-release plunger, this enterprising Hollywood photographer hooked it up with a solenoid to the shutter release of his portrait camera. Current is supplied by a B battery.
Housed in a cut-down file box, this little personal portable really drags in stations.
HOW much radio can you stuff into a portable, and how small can you make it? POPULAR SCIENCE asked these two questions, and here are my answers. The first is “plenty.” The second is that with standard, easily available parts, you can boil it down to a three-pound package 3½" by 5½" by 6".
CAN you really recharge dry cells? And does it pay? The answers are, respectively, an emphatic yes and a temperate maybe. To take the second point first, it would plainly not be sensible to lay out the $9 or $10 for the parts of this charger if you only use a handful of 10-cent cells a year.
Arc Method of Finding Scale Dimensions Cuts Mathematics
Oil Soaking Cleans Wood Rasp
New Lock Does Three Jobs
Drill Chips Fall into Can
Walter E. Burton
W. H. Greenfield
Marion L. Rhodes
Paul H. Graham
Television-set owners who are receiving poor video signals due either to location or set characteristics may benefit from the use of a wide-band pre-amplifier. The model above uses two 6AK5 tubes and has a selenium rectifier. In some areas it may eliminate the need for an outdoor antenna.
Ordinarily water helps to put out a fire, but in the field of chemistry the unexpected frequently happens.
Kenneth M. Stvezey
THERE are many stunts that can be done with water, but you’d hardly expect it to start a fire. Yet in chemistry you can find cases where a single drop serves as the spark to set off a spectacular bit of smoke and flame. It does this by acting as a catalyst.
As GOLFERS know, a putter must be lined up squarely if you expect to sink a putt. But alignment is not always easy. Here’s a visual aid for practice putting, made by Crittenden Associates, Chicago. At right angles to the line of travel are contrasting white and black lines.
PICNICS anywhere are a cinch with a new portable charcoal grill and broiler introduced by Torngren Stainless Steel Products, Inc., Somerville, Mass. When packed, the 7-lb. grill tucks away in a space only 7" by 13" by 13". Inside the case there’s ample room for a generous supply of charcoal.
IF YOU’D like to spend an evening or two experimenting with homemade fishing lures, you may be surprised at how you can both save cash and catch fish. The ones above may not be as fancy as those you can buy, but each has proved its worth on the line.
IF YOU’VE bought some sleek new garden hose, don’t be too quick to throw out the leaky old hose. Suggested above are some general applications, and you’ll find plenty of others. If you have to slit a length, as in getting it on a pail handle, a linoleum knife does the job nicely.
WITH a few cans of enamel, any cement floor can be painted to simulate flagstones. Use paint suitable for cement. Clean grease and dirt from the floor with a solution of one part muriatic acid and three parts water. Wear rubber gloves and apply it with a mop or broom.
BOATS with heavy oars can be rowed more easily if you attach a screen-door spring to each of the oars as illustrated. The springs support part of the weight of the blade on the return stroke. Insert a screw eye under each oar adjoining the grip.
So CLOSELY spaced are the front wheels that this lightweight tractor has tricycle-like maneuverability, turning easily in its own length. The front-mounted, air-cooled, 5-hp. gas engine provides dead weight for extra traction, while one or two 50-lb. weights may be fitted to each rear wheel.
CALVES, colts, and other young stock often upset their pails when feeding or drinking. Two methods of permitting the stock to be self-fed, yet guarding against upsets, are shown above. At the left, a piece of iron— bent as shown—is welded or soldered to the bucket, allowing it to be hooked on a fence or gate.
A CUP hook screwed into the wall near an outdoor faucet is convenient for hanging spare garden-hose washers. Those extra washers also will remind you to check the washer as you unscrew the hose and, if it is loose, to remove it.
EARL DEARDORFF, Hale, Mo., farmer, took a lot of kidding from neighbors when he built the gallows-like machine pictured at left, but the hoist quickly proved its usefulness. One of its first jobs was pulling a neighbor’s prize bull from a cistern where it had fallen.
HERE’S a way to turn a pickup truck into a mobile bunkhouse for camping trips. The Sportsman’s Top,shown installed, consists of waterproof-canvas walls and roof over an aluminum frame. After assembly, it can be attached in 15 minutes by fastening only four bolts.
A NEW rod-and-reel anchor, shown above, lets a fisherman doze while waiting for a bite. The holder is molded of tough, flexible plastic over a brass bushing that screws onto a metal mast 23 inches long. While the rod lies in a trough, springlike prongs grip the reel.
THE new portable, lightweight shampooer shown above is said to give your upholstery a beauty treatment three times as fast as any other method. The cleaning solution, controlled by a handle valve, is forced out through its magnesium head in a fine spray of dry suds. The brush, mounted at the end of an 8-ft. flexible shaft, is driven by a ¼-hp. motor. The machine is made by Certified Equipment Co., of Cleveland.
YOU’LL never have to grope around for your shaving equipment with the Mazwell Shave-King, shown at left. Patented locking arms grip any size brush and razor and hold them ready to hand. The hollow base is a receptacle for used blades.
SNAP a Safti-Khlor disk in your telephone mouthpiece, say its makers, and you can stop worrying about germs there for the next four months. The flat plastic disk is said to kill 40 to 82 percent of pathogenic germs in a minute—without blocking your voice.
Double-Walled Tumblers. These new iced-drink glasses of clear plastic are comfortable to handle as well as decorative, according to the maker, the Detroit Macoid Corp., Detroit. The air space acts as an insulator, preventing condensation on the outer surface.
WHEN I started to climb into the plane, Tony LeVier, the pilot, asked, “Are you nervous?” “No,” I said. I wasn’t, I suppose, because LeVier is one of the world’s great airmen. I had confidence in him. We were about to take off in the Lockheed TF-80C Shooting Star jet trainer.