Sir: It is the wish of the Aircraft Owners and Pilots Association to extend most hearty congratulations to POPULAR SCIENCE for the courageous stand taken on the matter of aircraft safety in the editorial, “Don’t Blame Science for This!” (Oct. '47, p. 7).
OF COURSE you have—if you’ve had a headache or a cold. It’s only aspirin! And, undoubtedly, you have sprinkled sodium chloride on your eggs and spooned sucrose into your coffee. Unless, that is, you don’t take salt or sugar. Yes, the big words of science really are a mouthful—because they say a mouthful.
This shell is half of an icosahedron—a fancy word for a 20-sided room—used by Westinghouse engineers to test new street-lighting fixtures. When the technician above has adjusted the globe enclosing a bulb, the other half of the odd-shaped room is attached, and multiple walls give an even distribution of light.
Air racing has been given back to the spectators by flashing new midgets that combine thrills and safety.
THERE’S a new day dawning in air racing—and it puts the planes practically in the onlookers’ laps. Never out of sight of the grandstand, the tiny racing planes belly down on the deck and whip around the pylons like stripped-down stock cars pounding the dusty oval of a county fair.
YOU don’t need to know a coil from a condenser to fix this radio. Throw-away units, as easy to change as radio tubes, contain practically everything that might go wrong in the set. Six “canned” circuits with pronged bases, designed to retail in department stores at $1.85 apiece, replace the maze of wiring located in back of the dial of a conventional radio.
Wing Changes Its Area. This telescoping airplane wing, invented by Thomas F. Gibson, of Cleveland Heights, Ohio, is designed to be extended at take-off for maximum lift and then retracted as the plane attains full speed and altitude. As fuel consumption lightened the plane, wing would be pulled in more to cut wind resistance.
TELEVISION for everybody comes a step closer with the development of mass-produced picture tubes, the heart—and one of the most expensive components—of video receivers, RCA’s new plant in Lancaster, Pa., is already set up to turn out one of the big cathode-ray tubes every minute, and at a price that may reduce the cost of small television sets.
WHEN a 4-oz. rod lifts 18 pounds of dead weight and bends 110°, that’s one answer to a fisherman’s prayer for lighter and stronger tackle. And that’s the claim for these glass-fiber fishing rods, a by-product of wartime research, by Tycoon Tackle, Inc., of Miami, to find a substitute for bamboo.
Everybody has his own pet idea of some gadget he would like to see in general use. What is YOURS? Popular Science Monthly will pay $5.00 for every such suggestion that it accepts for publication. Contributions cannot be acknowledged or returned.
Gigantic ring-shaped machines, with 10-billion-electron-volt wallop, may transform energy into matter.
How Scientists Study Atoms
How Design Was Chosen
Magnet to Weigh More than Cruiser
How Plans for Billion-Volt Accelerators Differ
Today's Line-Up of Atom Smashers
Alden P. Armagnac
SUPPOSE that a bullet could be fired 150,000 miles, six times the distance around the world. Suppose that it could be given a shove to speed it up every 150 yards. Suppose, too, that it could be so aimed and guided throughout this long, fast flight that it would hit a target no bigger than a man’s hat.
Mooring Made Easy. This self-propelled pontoon dock extends a laborsaving welcome to Navy seaplane pilots. Pushed along a 600-foot submerged cable by modified Sea Mule power units, the dock moves out from shore, then swings in any direction so that an incoming plane doesn’t have to maneuver crosswind.
PICK up your bed and ride, is the advice of Don Cast, of Columbus, Ohio, inventor of the collapsible, carborne bedroom shown here, which he calls a “Carbaña.” Folded for traveling, a canvas enclosure four feet high is opened up by tugs on two strategic straps.
STUDENTS at Hunter College, New York City, can test their knowledge of organic chemistry by simply poking push-buttons and watching lights flash the results. It’s all done on a homemade, electrically operated chart fashioned from odd parts of old pinball machines.
THE busy executive can now carry on conversations over the telephone without even lifting a finger to hold it. With the Jordaphone (PSM, Oct. ’45, p. 96), a wartime development of the Jordanoff Corp., he need only transfer the phone from its regular cradle to the special one in the top of the instrument.
You can have a constant supply of fresh air in your car even with all windows closed and the heater on, if you have this new Ford unit. The ventilator-heater shown above scoops fresh air through the front grille, heats it with hot-water coils, and delivers it to the car’s interior.
HERE is a racy new sports version of the jeep that Willys-Overland plans to put out this spring in the low-price class. Painted a fire-wagon red with cream trim and a gray convertible top, it is mounted on the 104-inch wheelbase chassis of the jeep station wagon.
EVERY tractor becomes a “machine shop on wheels” when equipped with a new “fixit” unit called the Farmcrafter. By merely harnessing the power of his tractor, the farmer can make on-the-spot repairs—like the drilling job above—and keep his tools sharp without having to hold up work while he goes back to the barn.
THIS rubber-mat obstacle course is a make-believe television tube—and the white marble is a stand-in for an electron. When Westinghouse engineers roll the ball—usually bronze—down the course, peaks and valleys simulate electrical voltage, while wooden obstacles represent grids and electrodes.
CYCLISTS can now stow their bikes in the baggage compartment of their cars, or take them aboard train, boat, or plane with the ease of a traveling bag. Used by paratroopers during the war, the Columbia Compax folding bicycle is now in production at Westfield, Mass., for general sale.
Gun-mounted camera eye keeps movie record of V-2 missile as it speeds into space at 3,500 miles an hour.
POPEYE is a seeing machine. Popeye can see things you can’t see. His big glass eye can follow a V-2 zooming 3,500 m.p.h. and tell you just what it does at the 100-mile peak of its flight. But even Popeye is no match for enemy guided missiles—he could not spot an attacking rocket soon enough to sound the alarm.
BY STEPPING up the compression ratio to 7 to 1 from the former 6.85 to 1, Packard has increased the power of its 1948 straight-eight series of engines. Largest is the 160hp., 356-cubic-inch engine shown above. A new hardened crankshaft sprocket plus a new roller-pin type of timing chain are said to give the engine longer running life.
TIRED of pumping tires? With an Auto-Vac, the mere push of a button puts the motor of your car to work inflating that slow-leaking tire. Operating off the windshield-wiper vacuum line, the device will raise a tire from flat to 30 pounds’ pressure in less than six minutes.
You need refill your auto battery only twice a year with the new Aqualator, according to the Embree Mfg. Co. Shown at upper right, the device uses engine heat to expand air in the three sealed containers so that the air pushes water to each battery cell.
THAT’S an invitation to enter the new lower-center-of-gravity 1948 Hudson. It results from the floor being set even with the lower edge of the frame, instead of on top of it, so that the floor is below the door-sill. The car is only five feet high, yet is spacious, with plenty of headroom.
THE massive teeth of this big fellow really dig in, biting 16 inches into the ground to haul out stubborn roots for clearing farm-land or highway rights-of-way. Designed for use with Caterpillar Diesel track-type tractors, the Fleco Root Rake is made by the Florida Land Clearing Equipment Co., of Jacksonville, Fla.
WORST enemy of a photographic explorer in Africa is not the king of beasts but the heat. The portable, gasoline-powered refrigerator shown above was designed by Wilson Refrigeration, Inc., of Smyrna, Del., for an expedition of the Philadelphia Academy of Natural Sciences.
A THIN smear of a new liquid white-rubber compound is all that holds together the two pieces of carpet padding shown above. But if you try to pull them apart, the padding will tear before the joint gives way. This self-curing adhesive, called Rug-Sealz, not only cements carpet ends, but repairs areas of dry rot and acts as an antiskid agent when applied to the back of a rug.
WITH jet power for take-off and flight, plus rocket power to help it poke its needlelike nose into the secrets of sonic speed, the Navy’s new Douglas D-558-2 Skyrocket is designed to fly faster than any piloted aircraft has ever traveled before.
WHEN GE research engineers run out of matches, they can gingerly light their cigarettes with radio waves from the tip of the armlike antenna at right, above. These “hot” high-power radio waves, 11 inches long, are produced by the magnetron tube at left, above.
THE stuff shown in the bottom of the glass tube at left is hydrofluoric acid, which eats glass in no time at all. Yet it has been there for three weeks! The answer is a new type of sandless glass that will give chemists their first chance to watch what goes on in experiments with the violent acid which, besides being used to etch glass, is employed in oil refining and synthetic rubber making.
JUDGES at this race track are on the up-and-up. Hydraulic cylinder under center of the stand at right raises it eight feet above the stone foundation to give the judges a better view of the race; guide rods on either side keep platform steady.
RESIDENTS of downtown San Francisco will soon receive high-voltage electric power packed in gas. The 110,000-volt current will reach the city through four underground pipe lines, each containing three one-inch power cables surrounded by nitrogen at a steady pressure of 200 lb. p.s.i.
THE dignified products of Britain’s Rolls-Royce, Ltd., cost from two to three times as much as the most expensive American car. What does a buyer get when he planks down $18,450 to $19,200 for a Rolls-Royce, or $12,900 to $17,700 for its faster, slightly smaller sister, the Bentley?
ABOUT to slide down the ways, this 20-foot wooden scale model of a Navy carrier will make her trial runs in a 40-foot-long test tank at the Stevens Institute of Technology. A sensitive inclining device will give an accurate report on the ship’s stability.
THIS Paris, France, youngster pilots a realistic model airplane through the perils of his first haircut. Less air-minded small fry can be snipped while riding a merry-go-round or mounting a roarless lion.
PHANTOM view above shows how five different vegetables share the new Layer Pak tin can put out by the Larsen Co., of Green Bay, Wis. The various layers of vegetables are separated by parchment-paper walls.
IF YOU should want to go around in circles, the new three-wheel Davis car can spin you around in a 13-foot radius at a good clip. What’s more to the point, this ability to make sharp turns is mighty handy when snaking through traffic and squeezing into tight parking spaces.
This indoor proving ground for tomorrow's giant aircraft engines will handle more powerful gas turbines than any yet built.
UNLEASHING their full power in rooms too hot for human beings, burners and turbines are put through tests that preview the engine performance demanded by the blueprints of tomorrow’s mightier aircraft. The roar heard throughout the building is the rush of air, 90,000 cubic feet a minute, that is gulped by the compressors, electrically driven to duplicate actual operation.
WITH this twin parking meter doing double duty along Main Street, the city saves money, the citizens have more parking comfort, and the curb looks less like a picket fence. Saving is not only in the initial investment, but maintenance and collection costs are cut in half, while meter receipts are doubled.
A PILOT need no longer depend on his memory to recognize weather hazards. The new “slide rule” shown above tells him what kind of icing clouds or thunderstorms he’s up against, and what to do about it. When a weather condition looming ahead has been matched with a picture, the pilot simply turns the dial until the corresponding key word appears in the “type” window at the left.
USING this new tire changer, two men can take an aircraft tire off its rim in less than eight minutes. The wheel and tire are placed on a base with a threaded shaft protruding through the hub. Clockwise rotation of a drive bar screws down a stripper tool to depress the side wall of the tire.
DO YOU want your auto engine in the front or in the rear? Would you like both a hard and a soft top for alternate winter and summer use? With the new Keller car, planned for 1948 production, the choice is up to the customer. Another boast of this new entry in the low-price small-car field is “cradled-in-rubber" wheel suspension, with all four wheels independently sprung.
Because a radio ham heard strange sky noises, we may get better FM and television—and learn more about our universe.
Military Use Foreseen
“Telescope of Tomorrow”
Sweeps Out Path in Sky
Years of Research Ahead
Finally Makes Contact
More Observations Needed
Raising Money a Problem
Hobby Goes on the Pay Roll
To Seek Celestial Elements
Molecular Action Signals Heat
WHEN young Grote Reber was a high school sophomore, he operated 9GFZ in Wheaton, Ill., and tacked so many recognition—QSL—cards to his bedroom walls that the plaster cracked and his parents cracked down. When not communicating with El Paso, Arequipa, Capetown, Prague, and other points, he designed equipment to communicate with them even better.
FEWER moving parts and easy disassembly are among the advantages of this new valveless, one-cylinder, four-cycle engine, shown being demonstrated by its French Foreign Legion inventor at a recent Paris exhibition. A continuously rotating sleeve above the cylinder, turning at one-quarter speed, feeds gas directly from the carburetor into the cylinder.
THIS evaporator draws unneeded heat from a room or basement to make hot water. It works like the similar unit that draws heat from the food in your refrigerator. Freon gas in the evaporator, warmed to room temperature, is compressed by an electrically driven pump, making it really hot.
WEATHER-RESISTANT and doubly effective, the metal, two-faced phony at the light came to the rescue of Decatur, Ill., citizens when some million-and-a-half starlings took over the city as a roosting ground. At first, stuffed owls, placed in treetops and on buildings, were used to scare the bird pests, but wind and rain soon knocked their stuffings out.
A PREFAB housing program—for guns, not men—is changing the looks of the U. S. Navy’s inactive fleet. Ragged outlines of topside armament are disappearing under shining steel igloos that will keep idle guns and firing mechanisms ready for business for the next quarter of a century.
MANY a parent has wished for something to keep Junior occupied during long drives. With this toy steering wheel, daddy can concentrate on the road ahead while young hopeful makes believe he too is driving. Made of hard rubber, the mock wheel is attached to the dashboard by a suction cup.
FLEXIBILITY of an artificially grown silver-chloride crystal is demonstrated here by Dr. H. C. Kremers, of the Harshaw Chemical Co. The crystals are pressed into slabs, then rolled into thin sheets—but each sheet is still a single crystal.
A DOCTOR with needle poised need no longer be feared by his patient. The new Hypospray shown above makes the injection of medicines through the skin almost pain-less. Flashlight size, the “gun” is operated by compressed air. The instrument was demonstrated recently by Dr. Edward B. Tuohy, President of the American Society of Anesthesiologists, at a meeting of the District of Columbia Medical Society.
THIS high-speed branding iron for marking wood and leather is electrically heated and can be used in presses or operated by hand. Interchangeable type, made of a bronze alloy for quick heating, is held in place by a dovetail clamp. A steel shank on the back of the heating element permits fitting the unit into a press.
THIS giant “lazy susan” has 10 complete gear-cutting machines on one revolving turn-table. One man can run it; he merely loads and unloads the machines as they go by him. It can be rotated in either direction at desired speeds, has separate controls at each tool, and disposes of chips automatically.
To SPEED recording answers in computing machines, Kodak has made a new camera that snaps 1,000 12-digit numbers a second. The numbers are photographed from a cathode-ray tube as spots; retranslated into electrical impulses by photoelectric tubes as desired for feeding back into the computer.
HERE’S a half-track for small farms, golf courses, and gardens. It weighs 750 lb., has six hp., runs four hours on a gallon of gas, and can pull a 10-inch plow. Tracks distribute the engine’s weight, increase traction, and prevent miring. Rear mounting of the air-cooled engine keeps heat and fumes behind the driver.
CARRIER-PLANE pilots can look forward to speedier rescues, thanks to a new Navy crash crane that packs nearly twice as much muscle as any of its predecessors. Entirely electric, the mobile, folding crane has a normal lifting capacity of 24,000 pounds, a vertical lift of 65 feet, and a speed of 10 m.p.h.
Foley's is designed to channel the flow of incoming stock and outgoing customers and purchases with maximum efficiency.
DOWN in Houston, Texas, is what is said to be the most modern department store in the world. Foley’s is carefully planned to speed the flow of customers and merchandise. Shoppers park their cars in the garage and walk through a tunnel to the store.
THIS new mechanical unloader shakes a freight car like a box of cornflakes, dumping its load of grain in one-tenth the time hand shovels would take. As operator throws a switch, a mechanical arm (left, above) opens the side door, tilts the car sideways, and starts flow of grain.
WARTIME’S proximity fuse is regulating hallway traffic at General Electric’s Schenectady research laboratory. Above, the girl at left has been “picked up” by a microwave transmitting-receiving unit (A), operating traffic light (B).
THERE’S a lot of life in the little capsule at the right, about to be inserted in the hollowed center of the three-inch magnesium “minnow.” When the lure hits water, its contents, sodium bicarbonate and fruit acid, react to produce a stream of bubbles and a series of “pops.”
FOR the first time in seven years, you can climb aboard a Europe-bound air liner and climb into bed. Though still scarce, sleeper planes are back, better than ever. Here’s the inside of a Sabena DC-6 sleeper.
THE operator of a power shovel is the concert pianist of modern construction mechanics. His touch on his controls must be delicate but positive. To watch him work is an adventure into the art of controlled motion. His shovel can rip up pavement, yet one of its tines can flick a piece of dirt off the edge of an excavation as deftly as a man could with his hand.
That’s a lot to the microchemists, who help atomic scientists, medics, historians, and sportsmen.
WHEN archaeologists pulled an ancient Roman emperor’s yacht out of an Italian lake bed, they found it decorated with a breath-taking variety of glass mosaics, indicating that every glassmaker in the old empire must have contributed to the job.
IF YOU’RE learning to ride a motorcycle, the policemen who patrol your streets and highways could give you some valuable pointers. Chances are these men are just about the best riders in the community. Because of the nature of their work they have to be.
When Stan put a car back together and had a piece left over, Gus didn’t need a dream book to tell that the customer was coming back mad.
Ferrule Bars Air from Gas Line
GUS WILSON was first down to the Model Garage that sunny winter morning. Whistling cheerily, he took off his coat and vest and hung them on their accustomed hook. He lifted down a pair of coveralls, wiggled into them—and found them unaccountably tight.
1. Spare Parts Pay Off. Some years ago I adopted the practice of always carrying this kit of spare parts, and at one time or another I have found a use for each item. Even if someone else makes the repairs, it is often a timesaver to have the necessary part readily available.
BACK in the early days of the automobile, gasoline, steam, and electricity competed for supremacy as the source of motive power. Before gasoline finally won out, many efficient steam cars had been produced, among them the 1905 Model E White steamer that is the prototype of this model.
DRESSED up in black walnut and polished copper, this small copy of the old oaken bucket now hangs from a wall bracket and holds ivy or a small plant. Alone, it may be used for cigarettes. All the necessary materials probably can be found in your scrap box.
SCARCITY of materials and high prices have never eased the lot of the work-shopper, but they do invite you to try new and different ways of building your favorite projects. When an idea for unit bookcases bogged down in a shortage of suitable wood, some inexpensive .051" thick war-surplus aluminum came to the rescue and proved to have a number of important advantages.
What you should know about electric shock, when it is most dangerous, and how to keep off the receiving end.
Basic Rules for Electrical Safety
IT IS not only possible to electrocute your-self but fairly easy. You don’t have to hunt up a third rail, high-tension line, or other potent killer; the job can readily be done at home with common house current. Avoiding an untimely end is also fairly easy, though it does call for a little electrical knowledge and a supply of common sense.
The chief electrical dangers in the home lie in a combination of defective equipment and unwise use. If the “hot” side of the 115-volt line should touch the metal housing of the hair curler, washer, lamp, or heater, a circuit to ground via the user could exist in these cases.
RESEMBLING miniature copper tea-kettles, these unusual candlesticks are made from a pair of lowly oil cans, available for a few cents apiece at the hardware store. Besides the copper-plated, snap-bottom oil cans, you will need only some ½" O.D. copper tubing and a few scraps of sheet copper.
FASHIONED in the form of miniature oil lamps, these salt and pepper shakers would grace any table. The chimneys are turned from colored plastic and the bases from aluminum. Making the set is an interesting lathe project—simple but requiring several careful fits.
THERE’S no need to worry if Junior can’t reach the pedals of his new car, for a pair of 2½" C-clamps will provide an excellent set of adjustable pedals. As the child’s legs grow, the clamps can be moved forward. Mount them as shown above and turn them up tight with a pair of pliers each time they are changed.
BY CLAMPING a hand grinder in the jig shown above, you can grind your jointer knives without removing them. A cup-wheel stone chucked in the power tool is moved along the edge of the knife. Level the ends of the jointer table and adjust the cutter head to bring the edge of one of the knives level with the plane of the table.
It Nearly Floored Me when I was faced with the job of painting a couple of large floors. After doing the first on all fours, it was a matter of giving my calloused knees a rest or risking double housemaid’s knee. So I got a new push broom and a wide shallow pan and set to work.
Assemble Your Furniture. Arms, backs, seats, and chassis of this new line of furniture may be bought separately and assembled into whatever you need—an ottoman, chair, love seat, sofa, studio couch, or chaise longue. Screws and lock mechanisms on the oak chassis facilitate installing or taking off the back and arms.
A PICTORIAL map and several small souvenirs from the area it represents are all effectively framed by this combination plaque and what-not shelf. Drawings, paintings, and photographs might be treated in the same way. Dimensions will depend on the size of the map or other pictorial subject used.
TAKEN straight from the side of a boat, this boarding-ladder bookshelf will bring the tang of the sea into your den. Nautical cleats and served-line fastenings contribute to the salty atmosphere. Make all the parts of mahogany if it is obtainable.
Scooter Has Three Speeds. Before becoming a cadet-midshipman at the US Merchant Marine Academy, William R. Kern welded some ¾" pipe, added a few gears, chains, and a 1½-hp. motor, and came up with the two wheeler shown above. It carries him 80 miles on a gallon of gas at an average speed of 30 m.p.h.
CABINET wood usually arrives in your shop machine planed and sanded. Is it perfectly flat? Very possibly, but don’t bank on it. Your first step in any woodworking operation will be to test the face of a board and to true it up if it is crowned, cupped, rough, or otherwise deformed.
DESIGNED for a production shop, this disk sander smooths rough stock and sands external curves to shape rapidly. Because of its wood construction, it is simple to build. Both the motor and hinged table may be mounted on a base of ¾" or heavier wood, a slot being cut to provide disk clearance and a place for attaching an exhaust unit if one is desired.
IF YOU have a hand power tool, a strip of sheepskin cut from a ten-cent shoe polisher and cemented around a grinding wheel accessory makes a first-class buffing wheel, suitable for polishing brass and any of the precious metals.
In your shop or your home, there are many ways they can aid you. Here are suggestions for making various types.
Lubricate the Tubing with Talcum
High Speed Gives Steadier Stream
Diaphragm or Piston Moves Air
Centrifugal Pump Operates Fountain
Walter E. Burton
W. A. Conway
PUMPS in one form or another are adaptable to a wide variety of jobs. Around the home and farm, they can save a lot of labor in moving bulk liquids. In the shop, they’ll provide a steady supply of tool coolant. In the laboratory and photo darkroom, they may transfer chemical solutions from one container to another.
Taper Turning Is Simplified. The bother of realigning a set-over tailstock after taper turning is eliminated with this handy device. It consists of a stub 60-deg. center pressed into a small plate of 3/16" stock that can be held in the 4-jaw chuck.
wax Frees Holders. If your sheet-film holders are difficult to slide in and out because they stick, apply a very thin coating of wax along the edges and they then will move with ease. The same treatment will overcome the tendency of metal film-pack adapters to bind.
FOR special effects in photography, a spotlight is practically indispensable. Here’s one built around an ordinary kitchen canister and so easy to construct that one evening should suffice to complete it. A No. 1 photoflood bulb supplies the light, and the lens is the glass from a hand magnifier.
IF YOU use several lenses for enlarging negatives of different sizes, this turret will enable you to turn any one of three quickly into position for use. The idea was adapted from motion-picture cameras that have a turret for changing lenses.
HERE is a method I am using successfully to dry negatives with an infrared lamp. With the face of the 375-watt lamp 18" away, 4" by 5" cut film dries in 20 minutes instead of the 90 I used to allow. A standard interval timer shuts off the light at the end of 20 minutes.
TWO of these box reflectors, each holding three No. 2 photofloods, will provide all the light you’ll need for virtually any ordinary photograph taken indoors. If you’re reasonably adept with tin snips, you can make the units with little effort and expense.
ONE of the more tedious jobs in electrical work is calculating the combined resistance of resistors in parallel. The classical method is to add reciprocals, but if the range of values is not too great, there is a simpler way that is accurate enough for most practical purposes.
FOR craftsmen who like to work in wood, a custom-made auto-radio panel is a satisfying project. The one at the right is made of curly maple with mahogany inlay. Richer in appearance than the chrome escutcheon it replaced, it also harmonizes with the car’s interior.
AN ELECTRIC combination lock is extremely handy on a frequently used door such as that of a workshop. No key is needed, and the combination can be changed at will. A sliding bolt with-drawn by a magnet or solenoid may form the lock, or if you want a key lock in addition, a magnetic strike such as is installed on apartment-house doors can be used.
Tool Aids Plastics Work. This outfit was designed especially for both internal and external cutting and carving of plastics by means of heat, but can also be used for wood and leather. It is made in two sizes, the larger including a hot-wire saw, cutting and carving tools, a control box, and extra accessories.
COMPACTNESS in radio receiver design has been achieved in many ways, but when really tiny sets are made they will probably employ permeability tuning. In this regenerative circuit the usual variable condenser and the coil with primary, secondary, and tickler windings are replaced by a thin plastic form 5/16" in diameter around which is wound a special low-resistance coil.
Want an extra phonograph for den or shop? Take your pick of these three one-tube music makers.
Oscillator Built in Pickup
Phono Strip Amplifier
LIST OF PARTS
High Input Yields High Output
LIST OF PARTS
LIST OF PARTS
MOST people who live in large house-holds know the advantages of having one or more small radios scattered around the house. If you want to listen in while you work, play, or rest, or if you just want to hear a different program from the one that’s coming in over the living-room console, you can go off and tune in on your own private set.
Headset Volume Is Adjustable. Sound level can be controlled by the user of this new under-chin headset made by Telex, Inc., Minneapolis. A volume control that may be clipped to tie or shirt front is provided with the unit. Signal Tracer Built from Kit.
MANY electrical appliances would be especially handy if you could use them in your car. An electric shaver or small radio drawing up to 25 watts will work off the 115-volt output of this converter. A 6-volt filament transformer with center-tapped secondary is used in reverse so that the 6-volt winding becomes the primary.
ORDINARY lamps up to the 150-watt size serve as reflector floods if you coat them with aluminum paint. Best results are obtained with the type made by mixing the metallic powder in a vehicle of thin shellac.
IF YOUR bench top acts as a sounding board for motor vibration, cushion the motor on expanding rubber plugs. A ¼" carriage bolt with a washer under its head is driven through a No. 5 rubber stopper. Drill a 1" hole in the bench for each bolt, making sure that the holes are deep enough to clear the boltheads.
QUICK heating and “wireless” handling are advantages of this simple soldering rig. Either a burned-out electrical iron with cord removed or one made for torch heating will do. A porcelain socket on an L-shaped metal base holds a screw-type heater element.
Fluids Don’t Seek Same Levels. The old rule doesn’t hold, for example, if a fluid is in a U-tube with legs of different diameter. Capillarity, which is the combination of surface tension and the adhesion (or lack of it) of the fluid to the tube, changes the rules.
HOSE clamps of the type shown in Fig. 1 sometimes let the hose bulge near the screw. Often a good clamp can be devised with wire and a machine screw, as in Fig. 2. Since the wire loop is wrapped around twice, it exerts clamping pressure at all points.
IF A pair of heavy casters is welded to the rear legs of a hand truck, it may then double as a flat truck when heavy loads must be moved considerable distances across the floor. The weight need not be lifted and no balancing effort is involved. Neither is there any chance that small objects will fall from the truck.
ONE of winter’s most forlorn sights is the window box that holds only straggly wisps of dead plants. The sketches above show a support that may be detached from the window casing for storage, or converted into a cold-weather bird station.
EVEN though a window-shade roller is in-expensive, there’s no reason why you should think only of a replacement in case of a breakdown. A little work will return most of them to service. Some rollers have a dust cap that may be easily pried off (Fig. 1).
INSULATION may be applied to a hot-water tank as illustrated here. Draw wire netting loosely around the tank and join the edges. Tighten it around the tank by inserting thin wooden spacers at equal distances. These should hold the wire at least ¼" from the tank as well as keep it tight.
SNAP on a flashlight, and you start a chemical reaction that produces electricity, heat, and light. Turn on the current in an electroplating tank, and electricity does a chemical chore, depositing a film of metal molecule by molecule. What is the link between test tube and electric spark?
WHEN the screws holding door hinges to the jamb lose their grip on the wood, try replacing them with stove bolts. Remove the stop strip and bore several large holes— of a size that will be concealed when the stop strip is replaced—to gain access to the back of the jamb.
IF YOU have a floor-type gearshift lever on your car, a golf ball will make an unusual knob. Measure the root diameter of the thread on the lever, drill a hole of this size about ¾" deep, and then screw the ball onto the shaft. The threads on the shaft will cut their way into the rubber cord inside of the ball.
THE hot needle flame of an alcohol blow-pipe is handy for hard and soft soldering, tempering small steel parts, annealing clock springs, and other chores. An old oil can makes a good torch if fitted with a blowing nozzle, tube, and mouthpiece as shown above.
WHEN disassembling a clock in which the main spring is not contained within a barrel, for convenience in handling clamp the spring in a clip bent from heavy baling wire or a large nail. Wind the clock up tight and fit the clip closely, bending it tightly around the spring with light hammer taps.
AN ILLUMINATED desk drawer is a real convenience for any desk worker who has occasion to inspect or retouch photographic negatives. It eliminates the need for a separate viewing and opaquing stand, is easily accessible, and slides neatly out of sight when it is not needed.
UNDER pressure a common kind of quick-adjusting clamp sometimes breaks at the point where its fixed cast-iron head is attached to the steel slide bar. The intact portion may be converted to a small but useful bench clamp by mounting it in a block of wood.
POWERED by a l½-hp. engine, a two-wheeled unit designed and built by William Lusk of Cicero, Ill., can be readily attached to a bicycle, lawn mower, or scooter. Small pneumatic wheels carry its 200-lb. weight without marking soft turf and give ample traction for cutting heavy grass.
IF YOU build a rack to hold several oil drums, save the cut-out portions of the stringers and mount them as shown at the right, using small butt hinges. Mortise the hinges sufficiently so that the drums will clear them on the rack. When you want to move a heavy drum on or off the rack, flip over the cut-outs so that there will be a level track to roll it on.
IF YOU’VE ever watched a woman get a measured cup of sifted flour, you’ve probably yearned to streamline the process. She puts the flour in a bowl, sifts it into a second one, measures a cup, and then tries to get the surplus back into the flour bag.
WHEN you have to draw a symmetrical outline having irregular curves, such as the deck plan of a boat or a wood-turning profile, first draw the half plan carefully on piece of tracing paper. Staple this to a strip of cardboard for easy handling.
THE more cutters and wheels I got for my hand grinder, the harder they seemed to keep in order. Finally I cut an old V-belt into 7" lengths, drilled ⅛" holes in them ¾" apart, and nailed them to the box bottom. The same holes take all three of the common shank sizes.
FOR a handy, nonspill loader for air rifles, obtain an oil can and cut off the tapered spout where it has an inside diameter slightly larger than a single BB pellet. To locate this spot, lodge a BB in the uncut spout, measure its position with a wire, and then hacksaw through the spout a trifle below the position where it lodged.
Tractor Engine Is Air-Cooled. Weighing only 750 lb. and easily transported on a truck, this utility tractor has individual rear-wheel brakes, pivoted front-wheel suspension, and three speeds forward and one in reverse. It is equipped with two power takeoffs.
A LIFE four to six times that of an ordinary automobile spring shackle is claimed for a new Harris concentrated pressure version. Schematic drawings, above, show how it works. Increased pressure at no higher cost is achieved by using a rubber bushing molded with a radius instead of a straight shoulder, as shown in bottom sketch, plus redesigned side plates to concentrate force directly into the spring eye, as illustrated at top.
WITH a new eye-level view finder attached to top of Micro 16 camera, as shown at left, both vertical and horizontal pictures can be taken more efficiently than with the regular built-in finder. It is also helpful in holding the tiny camera steady.
THIS two-horned giant is a new oil-operated circuit-breaker in use at Grand Coulee Dam. When a sudden surge of high voltage, such as a stroke of lightning, shorts the circuit, relays open the contacts but permit the current to arc across them, vaporizing the oil in its path and pushing it away.
FROM little flames grow giant jets, Westinghouse scientists believe. Through the study of candle-sized flames, they are working to improve the design of airplane jet engines. For ease of study, the tiny flames are reflected by a series of lenses and projected in magnified image upon a screen in front of an observer, as shown above.
THREE circular swivels on this Uni-Vise are interchangeable, making possible its use as a single, double, or triple swivel tool. The jaws of the vise itself are mounted on the top plate in either vertical or horizontal position. All these variations are adjusted by only three hex bolts, each working independently of the others.
DESIGNED for measuring tension or force in the limited spaces found in many mechanical assemblies, this new dynamometer, made by W. C. Dillon & Co., of Chicago, is three inches in diameter, weighs only one pound. It has an unbreakable lucite crystal, a red maximum hand, and a black dial with etched silver numerals.
OPERATING on hearing-aid batteries and using a tiny war-developed tube, this miniature radio claims 100-mile reception. A wire clipped to any handy metal object provides the aerial. The listener uses earphones and has complete dial tuning and full band selection.
ONLY slight pressure is needed to remove hub caps with this new tool, thus preventing any danger of denting or marring. Designed to remove every type of concealed hub cap on all makes of cars, it can also be used to remove front wheel grease retaining cups.
A MAN in the foundry business has written us for more information on the “hot suits” used in the Air Force’s climatic hangar (PS, Sept. ’47, p. 138). These are the work clothes with built-in air conditioning that keep humans from passing out when the big weather factory simulates the Sahara with a temperature of 165°.