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IT WAS HAMMERED AFTER MOULDING The hook gave way because someone tried to improve upon its shape after it was finished. The shop has ceased such practice.
FINGERS IN A PRESS TO HOLD THE METAL The simple guard is not in use and the workman is constantly in danger of crippling his hands. When it is lowered it is impossi
sible for him to endanger his fingers.
THE GUARD OF THE OPPOSITE PAGE IN PLACE It is in such a position that the man at the press cannot possibly place his fingers in a dangerous position on the
machine, and yet he does his work as well.
(First Prize, Ten Dollars)
Each month the two best and most interesting original items submitted to and published in this department will receive the first prizes of ten dollars each; the three second best, prizes of five dollars each; and the five third best, prizes of two dollars each.
These prizes will be in addition to the regular price paid for such material. Good photographs or well-executed drawings add to the value of your item and will increase its chances for a first prize. Items not winning prizes but considered worthy of publication will be paid for at our regular rates. There is only one restriction as to who shall compete: Professional writers are not eligible. You need not be a subscriber to compete.
Enclose return postage if you desire to have your contributions returned.
Address all communications to TECHNICAL WORLD MAGAZINE, "Made by Our Readers” Department, Chicago.
small door under the handle in open TO PREVENT SATCHEL THEFTS position, the device remains inoperative;
RECENTLY patented thief-proof but should the hand be removed, the
satchel is to protect the bank mes- door will quickly be drawn closed by a senger against robbery and assault, while spring, the cords attached thereto rehe is carrying money for the firm. A leased, and the alarms instantly sounded. mechanism guards against its being
In one compartment this is accomsnatched from the employe with
plished by the connection made out a great dis
with the electric turbance being at
bell, while in the once raised. This
other, a drum, acmechanism com
tuated by a spring, prises two alarm
is allowed to recompartments con
volve. The renected to a small
volver trigger disdoor in the hollow
charges until the handle by means of
spring is unwound, cord s. If the
the action being satchel is held so as
THE ALARM SUIT-CASE
like a rapid-firer. to maintain the When the m
George C. Denny,
Washington, D. C.
When the messenger's hand leaves the handle the bell
rings and the alarm gun is fired.
(Third Prize, Two Dollars)
(Third Prize, Two Dollars) SELF-ADJUSTING WEATHER MY FIRELESS COOKER STRIP
SOME time ago I made a fireless cooker W/HEN the “storm-house” is set up out of an old box and some asbestos W for the winter on the front porch, matting, the heat being supplied by an there is sure to be a leak at the bottom of electric iron. After putting an old
wooden box, sixteen inches deep and twenty inches square, into good shape with hammer and nails, I lined it with asbestos to keep in the heat and prevent the wood from burning. I then made a tight-fitting cover and lined it with asbestos.
Next I made a shelf the same size as the box and covered both sides of it with asbestos. To this shelf I nailed two thin strips of steel across the grain to prevent warping, and drilled numerous holes through it with a half-inch drill to allow the hot air to circulate freely. This shelf I fastened eight inches from
the bottom of the box. the door, unless a high threshold is pro
On the bottom of the box I fixed two vided, and that is a nuisance, because
triangular blocks of wood covered with everyone stumbles over it. There is room
asbestos. These blocks are to hold the for the cold wind to blow under the door
iron in position, and complete the for this reason—the door hangs plumb,
"cooker". while the porch floor always has a consid
To use the cooker, place your electric • erable slope. So if the door swings clear
iron upside down on the triangular blocks when open, it will be half an inch above
of wood and turn on the current to the the floor when closed.
required heat. Meanwhile, place whatTo remedy this defect, take a stick of
ever you want to cook in a dish or pan, wood in thickness about three-quarters
cover with a similar dish or pan, set it on of an inch by two inches, and as long as
the shelf in the cooker, and shut the lid the width of the door. Along one of its narrow edges make a saw-cut, and fasten a piece of rubber or leather as long as the stick into the cut by cementing or otherwise; or, instead, two smaller sticks may be screwed together with the rubber between them. Make two slots through the stick, crosswise, and pass a long screw, with a washer under its head, through each slot. Fasten these screws in the door about an inch from the lower edge, and leave them so that the stick may move freely up and down.
It will be found that this device adjusts itself automatically to the slope of the porch, and keeps out the cold very effectively.
THE ELECTRIC IRON SERVES AS THE HEAT UNIT IN
down tight. Then turn off the electricity
(Second Prize, Five Dollars) and do what you like until dinner time, LIGHT FROM ANY BATTERY and you will have the tenderest, juiciest A POWERFUL light can be obtained roast you ever tasted waiting for you from a dry battery that has been when you return.
worn out for almost any other purpose After a little practice you will become with the aid of a small tungsten electric expert in the matter of heating the iron light and a stamped metal handle and to the right temperature to cook a given connection. A reflèctor of tin can be dish in a given time.
added and a small lens placed in front Alfred I. Tooke, Edmonton, Canada. of the bulb, if desired. By pushing down
the button marked A the piece of spring metal B is forced against the base of the light, thus completing the circuit. For use with a central pole carbon battery the connection can be made with the aid of the hole C.
A lamp like this can be carried in the automobile or motor boat and attached to one of the ignition batteries when desired for use, or it can have its own battery always at hand. A remarkably strong light is given even with a low candle-power bulb. And yet not nearly as much room is taken up by the whole device as by a serviceable hand electric lantern.
R. D. Patterson, Brooklyn, New York. MAKING THE SHAKY STEPLADDER SAFE
(Third Prize, Two Dollars) STEPLADDER SAFETY
SUPPORTS CONSIDERABLE caution is required
in using a stepladder. A slightly swaying motion on either side while
# Fibre standing on one will cause it to tip over
Insulation and pitch the occupant off.
In the enclosed sketch is shown a simple contrivance to prevent a stepladder from tipping over, and thereby render it safe when in use. Two wood supports of proper length are fastened to the back of the ladder by means of screws, on which they are made to swing outward. A cord or light wire chain connects the supports to the ladder. When the ladder is closed up the sup
DRY ports are swung back on the legs. As
BATTERY the back of a stepladder is usually four to six inches shorter than the front, the ends of the supports, when closed down, will be about even with front legs.
J. E. Cooley, Hartford, Connecticut.
THIS STRAP IRON DEVICE. WITH A BULB, MAKES A
LANTERN OF ANY DRY BATTERY