Part 18 (2/2)

Before putting the reverse block on the motor, remove all the connections between the lower binding posts and the brush holders and connect both ends of the field coil to the lower posts. Bend the strips BB (Fig. 2) to the proper position to make a wiping contact with the nuts holding the strip of wood D, Fig. 1. Put the screw in tight

[Ill.u.s.tration: Direct-Connected Reverse]

enough to make the block turn a little hard. Connect as shown in the ill.u.s.tration. To reverse, turn the block so the strips change connections and the motor will do the rest.

--Contributed by Joseph B. Keil, Marion, Ohio.

** A Handy Ice Chisel [61]

Fis.h.i.+ng through the ice is great sport, but cutting the first holes preparatory to setting the lines is not always an easy task.

The ice chisel here described will be found very handy, and may be made at very slight expense.

In the top of an old ax-head drill a 9/16-in. hole, and then tap it for a 3/8-in. gas-pipe, about 18 in. long. Thread the other end of the pipe, and screw on

[Ill.u.s.tration: Combination Ax and Ice Chisel]

an old snow-shovel handle. When ready for use, screw the two pieces together and you have your chisel complete.

A short ax-handle may be included in the outfit. When the holes are finished and your lines set, unscrew the pipe from the head of the ax, put in the handle, and your ax is ready to cut the wood to keep your fire going.

--Contributed by C. J. Rand, West Somerville, Ma.s.s.

** More Uses for Pipe Fittings [61]

It would seem that the number of useful articles that can be made from pipes and fittings is unlimited. The sketch shows two more that may be added to the list. A and B are front and side views of a lamp-screen, and C is a dumbbell. The lamp shade is particularly useful for shading the eyes when reading or writing and, if enameled white on the concave side, makes an excellent reflector for drawing at night, or for microscopic work.

The standard and base, consisting of an ordinary pipe f.l.a.n.g.e bushed down to receive the upright nipple, are enameled a jet black, and if the device is to be used on a polished table, a piece of

[Ill.u.s.tration: Lamp Shade and Dumbbell]

felt should be glued to the bottom. A good way to hold the fan in the nipple is to use a small wedge.

The dumbbells are made of short pieces of 3/4-in. pipe with 1-2-in. couplings fastened to each end by pouring melted lead in the s.p.a.ce between the pipes and the couplings. The appearance is greatly improved by enameling black, and if desired the handles may be covered with leather.

--Contributed by C. E. Warren, M. D., North Easton, Ma.s.s.

** Sealing-Wax Bent While Cold [61]

If a piece of sealing-wax is supported in a horizontal position by one end, as shown at A in the sketch, it will gradually bend to the shape indicated by the dotted lines B. To attempt bending it with the hands would result in breaking it unless a steady pressure were applied for a long time. This peculiar property is also found in ice.

[Ill.u.s.tration: Bending Cold Sealing-Wax]

** Homemade Pottery Kiln [62]

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