I have just finished reading the article on the 1949 Buick in the December issue (p. 106). I am still wondering what those holes in the sides of the fenders are for. FRANCIS X. HALLIGAN, JR. Ashtabula, o. Although new this year on Buick, these circular openings, called Ventiports, do the same job as the vertical louvers once found in the sides of virtually all auto hoods.
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.
DO you like dogs? Then you should read the article, “Science Tries You Out On the Dog,” on page 151. Not only does it tell you some things about dogs nobody knew before; it will also give you an idea of what animal experimentation is all about. You should know that your liking for dogs is lending silent support to an organized campaign against the use of experimental animals.
It’s several hundred times bigger than the one in your carburetor, but it works the same way. This one will regulate the flow of water from the Friant Dam, near Fresno, Calif., into the Madera irrigation canal—up to a million gallons a minute at a velocity of 63 feet a second.
Buying a TV set? Here are some practical suggestions to help you decide what you want for how much.
WHERE TO BUY
WHERE TO PUT IT
THESE are the questions people are asking about television. Last year a novelty, the galloping postcards now threaten the automobile as the center of family interest. Grownups stare respectfully at moth-eaten movies that wouldn’t pull customers in a free theater.
WHAT’S happened to the fish? North Atlantic fishing boats head back to port with smaller catches every year—which means you pay more for your seafood dinner. To find out why, the Government’s Fish and Wildlife Service is taking a fish census.
Train Light Follows Track. This locomotive headlight turns with the track, instead of shooting off to one side. A pendulum supports the light on one end of a pivoted crossarm, the other end of which is forked. On a banked curve, the pendulum remains vertical, but a fixed rod between the fork tilts with the engine (diagram), swinging the light to follow the curve.
THIS jeep carries its own road right along with it. As the jeep moves forward, an endless, cagelike band of coarse wire matting completely encircling it is rolled around under its wheels. This gives them a broad, flat footing over swamps, bogs, soft sand, and heavy underbrush.
You may have seen iron filings used to demonstrate a magnet’s lines of force. Here’s the same thing gone modern. The curved glow seen above is actually a stream of electrons in a new electron tube developed at N. Y. U. Normally straight, the beam is here photographed as it is bent by the force of the horseshoe magnet held against the tube.
LACK of kitchen or laundry space is no problem for this new Ironrite roller ironer. When not in use, its fine-wood, console-type cabinet makes it a normal-looking piece of furniture even in the living room. Closed, its top can serve as a table.
Experimental electronic device looks at printing and says what it sees— at the rate of 60 words a minute.
Bomb Ruins Bocome Furniture
SOME time ago, The New Yorker magazine satirically described the invention of a reading machine. “It is obvious,” a fictional Professor Entwhistle was quoted as saying, “that the greatest waste of our civilization is the time spent in reading.
HAVE you ever been held a prisoner behind a door because the knob came off in your hand? That can’t happen with Supernob—the knob that once on stays on. The device is simplicity itself, says its inventor, Edgar Gadpaille, of New Orleans, a veteran doorknob prisoner.
MUSIC can now be typed as easily as a business letter. The Music Writer types standard musical notes and symbols on blank paper. A sample of its work is shown below. The five-line staff is made first by repeatedly hitting the staff key until the width of the paper is covered, just as a single line is made on an ordinary typewriter.
A NAVY buzz bomb named Gorgon IV has lately been darting over the Pacific on stub wings in the longest flights ever made by pilotless aircraft with ramjet engines. Time: “more than 10 minutes.” This may not sound like much of a record. But ramjets, the simplest of all engines and perhaps the best for supersonic flight, are still little beyond the Kitty Hawk stage of development (PS, Jan. ’49, p. 130).
Engineers are testing ways of using plant fossils from mountains to keep you well supplied with liquid fuels.
Andrew R. Boone
YOU can’t get blood out of a stone. But scientists are now taking oil out of a rock. The. rock is oil shale, a kind found in nearly every part of the world. It looks like dull-grey slate, but contains kerogen, the solid remains of tiny plants that lived millions of years ago in the bottoms of prehistoric lakes.
This new electrical brain now makes long-distance dialing possible.
ONE of the biggest obstacles to making long-distance telephone calls without speaking to an operator has been overcome: a machine has been built to see that you are properly charged for such calls. It’s a gigantic electrical contrivance that remembers what numbers you have called and how long you talked.
WHILE Consolidated Vultee is building 139-ton B-36 bombers, four of its young research engineers have been spending their spare time cooking up a tiny plane that weighs only 150 pounds—less than the pilots who ride it like a belly-whopper sled.
SUBMARINES of the u. s. Navy win soon carry their own life lines—thus boosting their crews’ chances of escape if trapped alive on the ocean bottom. A new messenger buoy, released from a sub, unreels a heavy cable as it floats to the surface. The cable then serves as a line to haul down a rescue chamber.
WOODEN fish crates can now be used over and over with this Saunders aluminum liner. Made in England, the lightweight liner fits inside the crate and keeps the fish from touching the wood. After each shipment, the lining can be removed, cleaned, and reinserted for use again.
THIS complete electric range was designed to save space in trailers, boats, and cramped apartments. Called the Ovenette, it measures only 16 in. high, 22½ in. wide, and 15 in. deep. Besides two burners, a griddle, and an oven, the stove has a built-in toaster.
IN this new flame thrower, for burning brush and lumber-mill waste, the fuel itself provides the pressure to shoot a stream of fire 25 feet. Instead of a pump, it has twin fuel tanks, connected near their tops. One 48-gallon tank contains Diesel oil; the other, propane, a flammable gas kept liquefied under pressure.
A MACHINE-GUN camera once used to train Jap aerial gunners now shoots the moon for David Rotbart, above, a back-yard astronomer of Washington, D. C. Simultaneously, as shown in the lower picture, it photographs a watch face in a mirror as a record of the exact time.
To put in this new bathroom just attach the entire room to your house and hook up the plumbing. Called Ad-a-Bath, it’s sold as a factory-assembled “package,” complete with fixtures, built-in cabinets and electric heater, and wiring. The room, shown here with one wall removed, is 6 ft. 8 in. by 8 ft., and 8 ft. 2 in. high.
When visibility is “zero-zero,” this new device takes on the brainwork and lets the pilot supply only the muscle.
IT WAS the kind of weather that makes you wish you’d stood in bed. I was flying a twin-engine DC-3. There I was at 1,500 feet in a thick, soupy fog; it was raining; the air was rougher than a bronco buster’s nightmare. And this was the first time I had ever been at the control wheel of any airplane!
New X-Ray Rival. These Ford workers are putting a capsule of cobalt 60, an isotope from an atomic pile, inside this big casting. Gamma rays from it will produce a picture on film attached to outside. Radium could also be used this way to examine castings too big or oddly shaped to be X-rayed, but radioactive isotopes are now cheaper.
THIS new camera took the night photo at right above by the light of a single No. 22 flashbulb. The sharpness of objects up to 600 ft. away was achieved with an f/l lens of 6-in. focal length, which gathers 2½ times as much light without loss of image quality as any previous lens.
HERE’S a six-passenger sedan for $1,235— if you can get it. A Seattle garageman, Roy McCarty, assembled this first test model of the new Mustang mostly from prefabricated parts: Hercules engine, Budd wheels, Warner transmission, Spicer rear end, aluminum body by Pacific Car & Foundry.
Researchers at a unique school are studying the behavior and emotions of Man’s Best Friend for clues to what makes people tick.
Truck Hauls Six Blocks
Pipe Joint Heats Water
DO YOU get nervous in strange surroundings? Fidget when you try on a new suit? Pull your ear or wiggle your shoulders when you sit down to take an exam? Most dogs do, too. And because they do, science expects to learn from them something about your behavior.
THE first Chevrolets with the postwar look, introduced to the public late last month, answer a question that has been bedeviling motorists ever since car bodies began swelling out to absorb the fenders— and collect expensive collision dents.
Researchers seek ways to keep “ram temperature” in supersonic flight from melting planes and cooking pilots.
NOW that jet power and airplane streamlining have cracked the “sonic barrier,” aeronautical scientists are tackling an even tougher foe: the heat barrier. You’ve seen what that can do to a flying object if you ever watched a meteor flaming through the night sky.
MAPS, charts, and other large documents up to 42 inches wide and % of a mile long can be quickly copied on 35-mm. film with this new Flofilm microfilm camera. It doesn’t snap the whole 3,300 feet at one time. Instead, it records the original document a little at a time as it moves rapidly past a narrow slit.
THE world’s newest and most modern hotel, the Terrace Plaza in Cincinnati, guarantees that you won’t feel crowded out of your room in the daytime by furniture useful only during your sleeping hours. Its 400 rooms have sofas that slide out electrically at night to become beds.
THIS new scale for grocers and butchers can figure to the penny what you’ll have to pay for a sack of beans or a cut of steak at any of 129,000 different combinations of weight and price. To do so, it carries 45,000 more figures on its price-computing chart than most prewar scales.
THIS crash truck to fight airplane fires can whizz up to a burning plane with water and foam nozzles in full operation even before the driver puts on the brakes. That’s because it has two engines—one to drive the truck, one to provide water pressure.
THIS battery of electric drills bores 16 deep, angular oil holes in 60 Ford crankshafts an hour—without a hand guiding the job. One operator loads the shafts onto the 39-foot production line, and another lifts them off at the end. Automatic controls do all the rest, even withdrawing a drill if accumulated chips threaten to snap it off.
THIS rubber-tired motor crane (below), reported the world’s biggest, can lift 45 tons— nearly three-fourths its own weight. A 225-hp. Diesel propels the Lorain giant at 1¾ to 18 m.p.h. A second, 164-hp. engine powers the turntable, 100-ft. boom, and winches.
SOME of the “newest” features of the new cars are old stuff to those who know their antiques. Many of these “new” ideas died young because the public wasn’t ready for them, or the materials to make them economically were not then available. Torque converters, steering-post gearshifts, overhead valves, front drive, rear-engine mounting, disk wheels, inter-axial seating, balloon tires, four-wheel brakes, coil suspension, three-abreast seating, underslung frames, the V-8 power unit, and the extensive use of aluminum in automobiles came and went decades ago, together with socalled “modern” styling.
CUSTOMERS in a New York manufacturer’s showroom think the salesgirl is careless when she casually slaps a clothes hanger against a wall with no hooks. Then they gasp when the metal hanger stays suspended there! The secret is a magnetic core a few inches wide and several feet long built into the wall itself and covered with wallboard and wallpaper.
WELDERS don’t ordinarily listen to the radio while working—too much static. But they can now, as shown above, if using GE’s new balanced-wave inert-arc welding machine. This welder balances out unnecessary parts of the welding current, sustaining the arc without causing the high-frequency radio signals that interfere with radio reception.
Now you can make your friends wonder what holds your pants up. The gimmick is a new belt (right) designed to be worn inside the waistband of your trousers. Six plastic stays that attach to the suspender buttons and three sets of snaps, replacing the buckle, adjust it to size.
THE television camera and receiver shown below work without radio waves. They were designed to keep an eye on dangerous industrial processes or bring a close-up of demonstrations and surgical operations to large groups of students. The system, called Vericon, operates entirely on wires and requires no government permit.
TINY plastic furniture and scale models of electrical appliances now let you see in advance what a remodeled kitchen wall looklike. To see how lifelike they are, look at the two pictures at the top of these pages. Can you tell which photograph shows a real kitchen and which its miniature model?
WHEN the movie Tulsa called for an oilwell fire, its producers sent for John Fulton, special-effects expert. The results of his handiwork are shown above. On a space no larger than a city block, he built 100 baby derricks 16 feet high, 24 dummy storage tanks, and a dozen model buildings.
GIANTS of the forest up to 5 feet thick fall quickly under this lightweight, oneor twoman chain saw. A 5-hp. gas engine drives the toothed chain, which both rips and crosscuts, around a blade. Handle-bar grips permit easy holding, while the swiveled blade cuts at any angle.
ARMY weathermen can set up this portable “electric weatherman” in the field and then go off and forget about it for a month. When they come back, they have a continuous, 800-hour record of wind velocity and direction. Moving arms connected to a wind-speed indicator and a weather vane trace wavy lines on a moving roll of paper.
WHEN the F. Ronstadt Hardware store in Tucson recently decided to install a loading ramp, its proprietors discovered they had no place to put one. The small, cramped loading area in back of the store just wasn’t big enough for a large, permanent ramp.
MORE than one tragic airplane fire has been traced to escaping hydraulic fluid ignited by short circuits or from contact with red-hot exhaust pipes. Now, as the result of two years’ research by the Douglas Aircraft and Monsanto Chemical companies, along comes Skydrol.
WHAT did the studio audience think of that radio comedian’s last gag? Here’s a machine that gets answers to such questions right from the audience itself. The device, in its present form, lets three people vote for, against, or neutral by simply flipping a threeway switch on the arms of their seats.
WHEN you’ve run a garage as long as Gus Wilson has, you’ve just naturally seen so many people reacting to so many different situations that nothing much surprises you. That’s one reason Gus is so slow to make snap judgments about people or cars.
Before starting out on a long trip with a child, fasten a shoe bag to the back of the front seat. You can then stow toys, fruit, cookies, tissues, and other travel needs in the pockets. Besides keeping the inside of the car tidy, it saves packing and unpacking a suitcase en route.
ON A slippery surface, it’s bad medicine to hit the brakes hard. Not only are you asking for a skid, but if you lock the front wheels you may ton end for end. A new safety device introduced by Wagner Electric Corp., of St. Louis, is designed to lessen the chance of skidding.
EVERY business has its experts. In any big brake shop, you may find several— mechanics with long experience who are locally known as the “best in the business.” Talk to them, and you’ll learn that their abilities go well beyond the instructionbook techniques.
THE flashing color and action of mallards swooping low over a stretch of marsh are captured in plastic for this table lamp. Although the birds and swamp grasses appear to be three-dimensional objects embedded in clear plastic, actually they are carved out of it.
HAVING tools handy when and where you need them is almost half the work as far as the usual home repair job goes. With this rack—designed for the kitchen or pantry— four basic tools are always on deck when you want them. Although other tools may be added, a simple kit is more convenient, and the average man can make dozens of repairs with a hammer, file, screwdriver, and pliers.
A TTENTION to detail counts in this small and very personal make-up chest, for the lady who gets it will have plenty of opportunity to study it at close range. The piece shown is made of mahogany. All the frame dimensions given in the drawing are based on a mirror measuring 8½" by 12½". If you can’t conveniently get one exactly this size, alter the specifications.
THE hand-crafted look adds to the attractiveness of this exceptionally sturdy coffee table. No power tools were used in its construction. The 26" width of the 2" thick top is made up of two 8½" outer planks and a 9" center one. Edges are -planed smooth, doweled, and glued together.
LAYER-BUILT bows—streamlined, hardhitting, and almost unbreakable—are coming into wider use by both hunting and target archers. These bows, glued up in a jig, use various woods, and sometimes other materials such as horn, fiber, or plastic.
VALENTINE, birthday, Christmas, and other greeting cards will convert an old cigar box into a handsome humidor, or change squares of cork to distinctive coasters. Cedar cigar boxes are best for the humidor. Sand down the imprinting on the sides or glue oblong panels over it.
ONE of the newest structural materials to hit the market looks like colored corrugated glass, and yet it is light, flexible, and transmits light and air but blocks vision. Called Prest-Glass, it has dozens of uses around the house. With it you can build partitions, design radiator covers or light fixtures, or face old desks or cabinets to give them a bright, new look.
YOU needn’t be a blacksmith, or have his equipment, to make this fireplace set. In place of a forge, you can use a gasoline blowtorch or coal fire to heat the pieces. Hot-rolled mild steel ½" or ⅝" square is probably best for the job. Necessary tools include a sturdy vise, a ball-peen hammer, pliers, and small anvil or block of iron on which to shape the metal.
DURABLE and attractive identification tags may be cut from scraps of sheet plastic and engraved with your name and address. A good size is 3/16" by 2" by 3½". Cut a slot about ¼" in from one end of the tag so you can attach it to the luggage. Letter the blank with a vibrator-type etching tool or a motor engraving tool.
WHEN drilling clear plastic, it isn’t always easy to get a clean, smooth hole. A slow feed, frequent backing out to remove chips from the drill flutes, and a cool drill produce the best results. Keep a small jar of water handy and dunk the drill in it between each stroke.
Here’s the long and short of it: One plug, one cord, and a pull-apart standard give you a table or floor lamp.
ALMOST every home can use an extra lamp—especially one that serves a double purpose. You can stand this one on the floor as a bridge lamp, or by removing the longer lower section of the standard and plugging the 10" section into the base you can use it as a table lamp.
THE covers of a paper-bound album, especially one that sees a lot of use, tend to become ragged. A permanent binding of plywood covers with brass hinges will get away from the tattered appearance and also give your album a handsome finish. I used ⅛" mahogany plywood.
YOU can use this radio-phono combination beside a bed, where it’ll double as a night table, or you can place it in the living room beside an easy chair. Radio, changer, and record storage are compactly arranged. No dimensions are given here since the size of the cabinet is controlled by the size of the radio and changer.
I had to yank the engine out of a car and I had no hoist or other lifting device. However, a dump truck was handy. I lashed a piece of channel iron to the body of the truck with about 3' of it sticking out over the rear. Then the truck body was raised to dumping position, bringing the end of the iron down over the engine.
Four V-sections are a sign of the true rush seat. There’s nothing more appropriate for early American ladder-backs.
R. P. Stevenson
LIKE most crafts, weaving rush seats takes a certain amount of skill. But that’s no reason to avoid the job. Your first attempts may not entirely equal those of the old hand, but you’re sure to find your own entirely satisfactory. The job is simple enough.
Liquid Filters Smoke. While water usually is used in the glass filter jar beneath the bowl of this pipe, the maker, Century Briar Pipe Co., Brooklyn, N. Y., suggests wine or cordial as an occasional substitute. Smoke is drawn from the bowl, through the liquid, and then into the stem. In a rough finish, the price is $2.50; smooth, $3.50.
Briar Pipe Co.
Plunger Cleans Stem. A composition piston on the end of the plunger scrapes all tars and juices from the metal stem of this pipe as the bit is withdrawn. The maker, Spiral-Kool Pipe Co., Santa Monica, Calif., offers three models in an aluminum alloy at $2, $3.50, and $7.50.
Briar Pipe Co.
Pipe Has Cooling Chamber. Smoke drawn through the slotted outlets expands and cools as it enters the air-cooled chamber formed between the bottom of the bowl and the pipe body. The liner absorbs moisture. Made of imported briar root and in several finishes, the Pavey Pipe Co., of Seattle, Wash., prices them at about $12.50.
Briar Pipe Co.
Tamper-Spade Fits on Pipe. About the length of a kitchen match, this gadget snaps into a holder screwed to the shank. One end is round and flat for tamping tobacco in the bowl. The other is spadeshaped for loosening ash or dottle. James King & Co., Portland, Ore., sells it for $1.
YOU CAN put this in your pipe and smoke it: besides being better looking than the usual hard-rubber stems, plastic stems are a lot tougher. If you’re a man who bears down heavily, you probably gnaw through a factory-made job in a few weeks. On the other hand, a plastic stem will give you months of good smoking.
Versatile and easy to use, the stapler is a readymade substitute for tacks, pins, string, tape, and glue in dozens of light fastening jobs around the home and shop.
Reading the tops of paper bags for lunches is no guarantee that Junior won’t dip into the cake before the noon recess. However, stapling does make the bag neater and easier to carry. The same idea can be applied to mothproof paper bags with faulty fasteners, center photo.
In a previous article on grooving and rabbeting (PS, Nov. ’48, p. 204), a statement was interpolated in the text that “the edges of a groove or dado cut with a wobble saw will be angled unless it is made in a series of shallow cuts.” This statement, based on insufficient experience with this particular equipment, was incorrect.
DON’T throw away that old drill chuck. Here’s an excellent use for it. Even though the chuck has a bad run-out, it doesn’t matter a bit. The only requisite is that the chuck grip the work. Of course, you can put your best drillpress or lathe chuck to work in the same way.
Stand Holds Work Horizontal. This stand, made by the Bush Manufacturing Co., of Clawson, Mich., simplifies work on tilting-table machines. The angular tilt of the machine table is offset by adjusting and locking the Bush Tilt-Top table in a level position. It is adaptable to such machines as circular saws, jigsaws, bandsaws, drill presses, and jointers. Dimensions of the table are 16" by 28", and height, 25". The weight is 45 lb. It has cast-iron trunnions in front and rear with screw-type locks and heavy formed-steel legs and braces. The motor tilts with the base of the tool.
Bush Manufacturing Co.
Dial Indicator Fits Pocket. About the size of a pocket watch, this dial indicator measures thickness up to ⅜" on a dial that is graduated in thousandths of an inch. The smaller hand counts the revolutions of the larger hand. Priced at $15, the indicator is made by the L. S. Starrett Co., of Athol, Mass.
Bush Manufacturing Co.
Fixture Sharpens Bench Saws. Provided with centering plugs for saws of various-sized arbor holes, this fixture may be used for sharpening rip, crosscut, and combination saws. An indexing device locks each tooth in position. Two grinding wheels, one with a radius and the other with a 45deg. bevel on one edge, are also available. The sharpener, made by Treyco Products, Buffalo, N. Y., sells for about $11.
Bush Manufacturing Co.
Lightweight Drill. The Thor portable electric drill is smaller and lighter than the usual ½" drill, according to the maker, the Independent Pneumatic Tool Co., of Aurora, I11. It has a trigger switch, Jacobs chuck, and a removable handle that screws into the top when a T-grip is desired for heavy drilling. Switch is in the lower handle. The housings are highly polished, die-cast aluminum.
LIKE many other accessories around the shop, a drill-press foot feed is something you can get along without. But when you once use one, its convenience will probably make you wonder why you’ve delayed so long. The feed shown was designed for a floormounted press.
WHEN Jet Stenen, of Van Nuys, Calif., bought a surplus gun turret from a salvage company, he had every intention of using it for a telescope mount. However, he never seemed to get enough cash ahead for the telescope he wanted. Casting around for another way of using the turret, he hit upon the idea shown in this photo.
Turning Duplicate Parts. With this setup, it’s easy to duplicate simple turned parts with reasonable accuracy. For the lathe shown, put the taper attachment in place in the usual manner but remove the guide-bar slide. Clamp the template for the part to be turned to the guide bar, with the template axis parallel to the ways.
NOW you can snap a picture and see it only a minute later. The camera that does this is an entirely new type. It’s the first production model of the Polaroid Land Camera (PS, May, ’47, p. 150). It costs less than $100. The camera uses a special film that gives you eight pictures.
EACH time you turn the hand wheel, this darkroom safe dispenses a single sheet of enlarging paper. The dimensions shown suit the safe to 8" by 10" paper. The box is quickly assembled from ¼" plywood or scrap stock. Thin strips spaced away from the inside edges of the hinged cover make an adequate light trap.
A FAMOUS photographic instructor once said that the easiest way to spot enlargements is to make perfect negatives in the first place. But like lots of theories, this one doesn’t always work out in practice. Skilled retouchers can work wonders on a negative.
Pocket-Size Viewer. The MiniVuer for 2" by 2" transparencies is made of plastic by the Craftsmen’s Guild, Hollywood, Calif., to sell at $1. Curved design of the slot makes handling of slides easier and quicker.
The Bell and Howell Company’s
Miniature Is Fully Automatic. The Bell and Howell Company’s new Foton features a built-in spring motor that advances the 35-mm. double-frame film and also winds the shutter. Besides single shots, the Foton also shoots bursts of 15 frames in rapid sequence at the rate of four or five a second. This camera introduces the T/ stops instead of f/ stops. T/ stops are determined by the actual nonabsorbed amount of light the lens transmits. With a 2" T/2.2 (f/2) lens, the Foton is priced at $700.
The Bell and Howell Company’s
Slide Viewer Has 7½" Screen. Occupying less than 1 sq. ft. of table space, the Kodaslide Table Viewer incorporates a complete projection system for miniature photo transparencies. The diagram above shows operation of the viewer. When a slide is pushed into position, the 75-watt lamp is turned on. It’s automatically shut off when the slide is withdrawn. The Eastman Kodak Co. offers the viewer at about $95.
The Bell and Howell Company’s
Wafer-Thin Film Holder. This 2¼" by 3¼" cutfilm holder weighs only 4/5 oz. and is 3/16" thick. Construction is one-piece aluminum. It is priced at $1.25 by the Wesley Manufacturing Co., Chicago.
WHETHER you use it as a continuity checker, a voltage reducer, or a fused, portable outlet, this versatile tester will soon earn a place in your shop. It is made of standard electrical parts including an outlet box, 8' of heavy-duty appliance cord, a three-hole cover and anchor plate, clips, two outlets, and a SPST switch.
A SPRAY adapter for five-gallon paint containers has been announced by The Silver King Company, Chicago. The device consists of aluminum top and bottom covers that clamp to the can by means of wing nuts. It also includes a gauge, regulator, and safety valve. Paint outlets fit standard equipment. The spray is featured as a time and labor saver in industrial applications.
LESS wasteful fueloil delivery may result from this remote indicator made by Rochester Manufacturing Co., Rochester, N. Y. The tank-gauge unit is connected by a cable to a plug near the filling pipe. Connecting the indicator, right, the delivery man gets automatic readings of the fuel level, telling him how much to deliver and when to slow and stop to prevent overflowing.
Television programs tuned in on a master set can be duplicated on as many as 12 extensions. Each is a complete receiver minus the tuning section. It has an on-off switch and volume control; all other adjustments are made at the master. No special installation or separate antenna is required.
HAVE you ever thought of budgeting a radio? That is, investing small quantities of money, time, and study until they add up to the finished job you want? If you now have a nodding acquaintance with the electronic art, you’ll learn a great deal more by watching this radio work as it grows.
Your circular saw and drill press take the labor out of making mortises and tenons. Some of the other standard tools are helpful, too.
Edwin M. Love
A FEW accurate saw cuts will shape a tenon on the end of any piece of wood. Which is practically the same as saying that the job is made to order for a circular saw. Given your choice of home-workshop power tools, you’ll probably take advantage of the speed and precision of a bench saw for making the tenon half of the mortise-andtenon joint.
COLD light is exactly what you might think it is—light without noticeable heat. A firefly and fluorescent lamp are common sources. Such light is still imperfectly understood by science. Fireflies produce it through biochemical action.
REMOVING old wallpaper is almost as easy as peeling a ripe banana when you slide this steamer over the wall. It’s a big timesaver on your Spring repapering job, and if the walls are plaster there’s little chance of gouging them as you might with a scraper.
HEATING cable, developed for hotbeds, is finding a variety of other uses. Buried in concrete, it’ll keep sidewalks and driveways clear of ice and snow; wrapped around pipes it prevents freezing. Some other uses include melting ice in gutters and downspouts of buildings and along the eaves, and heating floors in poultry houses, kennels, and other buildings.
NO ORDINARY “doodlebug,” or superficial auto-tractor conversion, the curious vehicle above is the product of Paul H. Walker, a die-shop foreman of North Oxford, Mass. In his spare time Walker and his wife operate a small farm, and they needed power to make the job easier.
A NEAT mechanical principle is used in new reversing outboards, as shown in these photos of a Johnson motor. A bevel pinion on the vertical shaft is constantly meshed with two bevel gears on the propeller shaft. Neither of these is fastened to the shaft.
PHYSICALLY handicapped and elderly persons frequently have difficulty getting in and out of bathtubs unassisted. It was with this in mind that I built the stairway shown above for a patient. The user sits on the top step, swings the feet into the tub, and then hitches down the other steps.
THERE’S usually some wasted space in every refrigerator—the area just beneath the wire racks. To utilize this space, I converted an old antifreeze can into a holder for a dozen eggs, a pound of butter, and a few packs of cheese. It clamps below the bars of a wire tray and has a hinged door of clear plastic.
DESIGNED for tyro modellers, this monoplane with a 24½" wingspread is built in a metal jig. Outlines of all the parts are printed on balsa sheets. They are cut out, slipped in the jig, and glued together. When assembly is almost completed, the jig is slid out through the plane’s nose.
A ROD-SHAPED heater that slips into the dip-stick opening keeps an engine ready for instant starting during cold weather. When the car is garaged for the night, the stick is removed and the heater inserted and plugged into a 115-volt AC or DC outlet.
ALWAYS useful in radio and other electrical work, a pair of thin-nose pliers can be made by grinding down ordinary pliers. As long as ⅛" of metal is left, strength of the jaws will be sufficient for most tasks.—Howard E. Graves, Huntington Park, Calif.
CYCLISTS can save themselves inconvenience if they’ll carry along a refrigeratorbowl cover. When you park your bike outdoors, snap the cover over the seat. It’ll protect the seat against dust, rain, and snow. —Charles Byron Pease, Avon, N. Y.
LOSSES of new-born pigs during cold nights are said to be reduced by an infrared heater. The one above is made by the Dry Clime Lamp Corp., Greensburg, Ind. It costs about $18. A board placed across the corner of the pen 6" above the floor allows the pigs to move freely but prevents the sow from squeezing into the corner.
BUCKETS manufactured by the Botten Bucket Company, of Chagrin Falls, Ohio, for feeding and watering livestock are shaped to fit into a corner of the stall. They’re sold with a bracket that’s permanently installed in the corner. A removable pin secures the bucket to the bracket.
IF YOU buy a supply of peat humus for your garden this spring, you may find it packaged in a new way. Shore Line Industries, of Clinton, Conn., are now producing packages from Bakelite polyethylene for this purpose. Unlike a paper container, the plastic one won’t decompose from organic activity in the humus.
MANY persons must start early garden plants in one or two windows. Here’s a way to make better use of the space. Stack the flats one above the other by building a stand as shown. Pivot each box so you can tilt it to face the sun. Next day turn the stand around and tilt the boxes the other way to straighten the growing plants.
THESE kitchen mitts, to protect a housewife’s hands and nail polish, are quicker to slip on and off than rubber gloves. Big enough to allow complete finger freedom, they also fit on either hand. Servette Corp., of New York, makes the new mitts of flexible, transparent Vinylite plastic that is unaffected by acid, grease, or stains.
THE magnifier above has an 8-inch lens circled by a 12-inch fluorescent light. The result is a large, illuminated area for examining or working on an object. Two elbow joints in the cast-iron stand permit accurate positioning of the lens.
Non-Clamping Slicer. Four rubber suction cups hold this food grater, slicer, and shredder steady. A quarter turn locks the cast aluminum handle in place. The body of the grater also is cast aluminum but the square top is of tinned steel. The Hamilton Metal Products Co., of Hamilton, Ohio, prices the grater at about $7. Match Holder Fits Paek.
It Lights Up Your Phone. No more fumbling around in the dark when the telephone rings late at night. The FoneLite, made of black plastic by Stapleton Industries, Inc., Cleveland, Ohio, lights the dial with a 7½-watt bulb. Handy note pad slides out in a drawer.
HOW do editors, especially POPULAR SCIENCE editors, stay out of jail? Two readers, within a few days, have asked that somewhat shocking query. Their reasoning goes something like this: Your job is to publish news of how things work, what they are, and what they mean.