A Diving Helmet from a Water Heater
THEY go down to the sea in old water heaters along the Atlantic coast these days, now that some young man with a leaning toward aquatic sports has proved how easy it is to make an excellent diving helmet from a metal water heater which will enable its wearer to walk comfortably on the sea floor 35 feet and more below the surface. A few feet of garden hose, two pairs of bellows, a couple of valve boxes and a cylindrical metal boiler of the type used in most homes for heating water, are the essentials for building one of these helmets.
By Allan Carpenter
POPULARITY of miniature golf has brought the game right into the basement in the form of a knockdown course that can be picked up and stored away almost as easily as you would a game of croquet. It’s an exciting game the whole family can enjoy the year roundâ€”from the youngsters on up to the avid golfer who will find it good practice in keeping his putting eye keen. Standard putters and irons are used and scoring is done as in real golf, penalties being counted as strokes. As for space, most basements, especially those with compact heating units, will accommodate the “concentrated” nine-hole course pictured in the illustration above, but, where there’s only a minimum of space, a lot of fun can be had from a much smaller course. As each green is complete in itself and lightweight, the course can be quickly set up. Most of the greens are fairly shallow to permit stacking them in little space when not in use. Where yard area is sufficient to permit an outdoor course, a suggested layout for an 18-hole one is given in the plan view on page 197. Construction of nine additional greens is given to supplement the nine shown above.
A Fan Motor Television Receiver for Experimenters
by L. B. ROBBINS
Here is a simple and easily-built type of television receiver with which you can pick up the television images now being transmitted over the air from a number of stations.
THE time is now ripe for radio fans who build their own sets to construct a television receiver. Several broadcasting stations are on the air transmitting on both long and short waves, and have so perfected their apparatus that a simple receiver like that illustrated in the accompanying drawings will bring out the pictures with a fair degree of clarity and brilliancy.
I’m not quite sure why this poor kid has to put the candle on his head to prove some “scientific” point. It looks like it’s about to set his hair on fire.
Novel Dry-Ice Gun Extinguishes Candle
To within 1/4″ of the edge, cut out the top of a cardboard salt box, and tie a piece of rubber balloon over it. Cut a 1-1/2″ hole in the opposite end, roughening its rim with a penknife. Load the gun with carbon dioxide gas by inserting “dry ice.” Aim the gun, tap the rubber, and an invisible ring of gas will smother a candle flame six to eight feet away. You can stage an amazing “William Tell” stunt with the gun as shown below.
Vacuum Tube Tesla Coil Does Fascinating Stunts
Light bulbs and spinning wires which glow with weird effects, cigarettes which light mysteriouslyâ€” these are a few of the stunts you can do with this vacuum tube Tesla coil.
PLYWOOD PLAY PLANKS
Give your child countless hours of interesting, instructive, and clean play by making him this jumbo-size set of building blocks.
ANY kid who has this plank set will be . the hero of the blockâ€”and his hero will be his dad for making it for him. With the set, he is equipped to build any number of walk-in projects. Houses, forts, ships, castles, garages, locomotivesâ€”there’s no limit to the designs that healthy imagination and young hands can produce.
The planks are light and clean. They are simple enough for a three-year-old to use, yet interesting enough to keep a ten-year-old busy. No nails or fasteners are needed â€”the planks interlock strongly and safely. They won’t crack or warp and children can’t break them. Even the most ambitious play-plank buildings can be dismantled and stored in a few minutes.
Stove From Unexploded Bomb
Even unexploded bombs are being used in Germany for commercial products because of the shortage of materials. A Hamburg firm is removing the explosive from 1000-pound dud bombs and rebuilding the shells into stoves. Hinged doors permit fuel to be added and ashes to be taken out.
Butter Churn From Washer
Here is a way of converting your washer into a butter churn in just a few minutes. Cut a triangular hole in the center of a sheet of plywood so that it fits tightly over the agitator of the machine. Then assemble four separate compartments on the plywood base, making them 2-1/2 x 3-7/8 x 7 in. to hold quart-size fruit jars. Fill the jars half full of cream to allow for expansion and fasten the lids tightly. Churn the cream by laying the jars in the compartments, as shown, and turning on the washer for the required length of time.
Elton L. Nash, Maple City, Mich.
Check out the cover for a better view of the finished car.
MI’s Speedball Special
You can build this beautiful sports car for less than $500 with ordinary tools.
By Don Bruce
HOW would you like to own this snazzy-looking mahogany-paneled sports car? You canâ€”and for less than $500 if you are the least bit handy with ordinary tools and not afraid to get your hands dirty. The entire chassis and body are made of wood. The power plant can consist of any 2- to 4-cylinder motorcycle engine. Because of its high power to weight ratio, about 12.3 to 1, you will be able to do close to 90 mph. The finished car will weigh in the neighborhood of 750 pounds.
This is insane. I don’t trust myself to make an improvised shelf, let alone a gas mask. Plus, a gas mask that requires you to hold your nose while breathing does not exactly inspire confidence.
Civilian Designs Simple Gas Mask
With the threat of gas raids hanging” over more and more cities in Europe, the demand for gas masks in many communities far exceeds the supply. To provide some sort of gas protection in case of an emergency, an ingenious Scandinavian inventor has designed the improvised mask shown at the left. It consists simply of a hollow wooden tube and a cloth bag filled with chemicals. Air purified by the chemicals is sucked into the mouth through the tube, while the nose is held shut with the thumb and forefinger of the hand holding the mask.