The Boy Mechanic: Volume 1 eBook

This eBook from the Gutenberg Project consists of approximately 823 pages of information about The Boy Mechanic.

The Boy Mechanic: Volume 1 eBook

This eBook from the Gutenberg Project consists of approximately 823 pages of information about The Boy Mechanic.

donated a pegging awl, Fig. 2, discarded by him due to a broken handle.  With these two pieces of apparatus I made a hand drill for light work in wood or metal.  By referring to Fig. 3 the chuck, A, with stem, B, were taken from the awl.  The long wire beater was taken from the beater frame and a wire nail, 0, soldered to the frame, D, in the place of the wire.  The flat arms were cut off and shaped as shown by E. The hole in the small gear, G, was drilled out and a tube, F, fitted and soldered to both the gear and the arms E. This tube, with the gear and arms, was slipped over the nail, 0, then a washer and, after cutting to the proper length the nail was riveted to make a loose yet neat fit for the small gear.  The hand drill was then completed by soldering the stem, B, of the chuck to the ends of the flat arms E. Drills were made by breaking off sewing-machine needles above the eye as shown in Fig. 4 at A, and the end ground to a drill point.  —­Contributed by R. B. J., Shippensburg, Pa.

** How to Make a Stationary Windmill [445]

A windmill that can be made stationary and will run regardless of the

[Illustration:  Runs in Any Wind]

direction of the wind is here illustrated.  Mills of this kind can be built of larger size and in some localities have been used for pumping water.

Two semi-circular surfaces are secured to the axle at right angles to each other and at 45 deg. angle with that of the axle as shown in Fig. 2.  This axle and wings are mounted in bearings on a solid or stationary stand or frame.  By mounting a pulley on the axle with the wings it can be used to run toy machinery.

** Electric Anesthesia [445]

It is a well known fact that magnetism is used to demagnetize a watch, and that frost is drawn out of a frozen member of the body by the application of snow.  Heat is also drawn out of a burned hand by holding it close to the fire, then gradually drawing it away.  The following experiment will show how a comparatively feeble electric current can undo the work of a strong one.

I once tried to electrocute a rat which was caught in a wire basket trap and accidentally discovered a painless method.  I say painless, because the rodent does not object to a second or third experiment after recovering, and is apparently rigid and without feeling while under its influence.

To those who would like to try the experiment I will say that my outfit consisted of an induction coil with a 3/8-in. iron core about 3 in. long.  The primary coil was wound with four layers of No. 20 wire and the secondary contains 4 oz.  No. 32 wire, and used on one cell of bichromate of potash plunge battery.  The proper amount of current used can be determined by giving the rodent as much as a healthy man would care to take.  Fasten one secondary electrode to the trap containing the rat and with a wire nail fastened to the other terminal, hold the vibrator of the coil with your finger and let the rat bite on the nail and while doing so release the vibrator.  In three seconds the rat will be as rigid as if dead and the wires can be removed.

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The Boy Mechanic: Volume 1 from Project Gutenberg. Public domain.