The legs are shaped at the ends to fit into a 5/8-in. hole bored in the top pieces as shown in Fig. 2, the distance between the centers of the holes being 7-5/8 in. in one piece and 9-5/8 in. in the other. The lower rails are fitted in the same way, using a 1/2-in. hole bored into each leg 2-1/2 in. up from the lower end.
Each pair of legs has a joint for folding and this joint is made by boring a hole in the middle of each leg, inserting a bolt and riveting it over washers with a washer placed between the legs as shown in Fig. 3. The entire length of each part is rounded off for the sake of neatness as well as lightness.
About 1/2 yd. of 11-in. wide material will be required for the seat and each end of this is nailed securely on the under side of the top pieces. The woodwork may be stained and varnished or plain varnished and the cloth may be made to have a pleasing effect by stencilling in some neat pattern.
A Small Home-Made Electric Motor
The Motor Complete
Commutator Parts
The accompanying photographs show the construction of a very unique electric motor, the parts consisting of the frame from an old bicycle pedal wrapped with insulated wire to make the armature and three permanent magnets taken from an old telephone magneto. The pedal, being ball bearing, rotated with very little friction and at a surprisingly high rate of speed. The dust cap on the end of the pedal was removed and a battery connection, having quite a length of threads, was soldered to it as shown in the photograph. The flanges were removed from an ordinary spool and two strips of brass fastened on its circumference for the commutator. The spool was held in position by a small binding post nut. The shape of this nut made a good pulley for a cord belt.