and turned in the
bearings detailed in Fig. 2. J was a nut from a wagon bolt and was
placed in the bearing to insure easy running. The bearing blocks
were 3 in. wide, 1 in. thick and 3 in. high without the upper
half. Both bearings were made in this manner.

The shaft C was keyed to the hub of the wheel, by the method shown
in Fig. 3. A staple, K, held the shaft from revolving in the hub.
This method was also applied in keying the 5-in. pulley F, to the
shaft, G, Fig. 1, which extended to the ground. The 2-1/2-in.
pulley, I, Fig. 1, was keyed to shaft C, as shown in Fig. 4. The
wire L was put through the hole in the axle and the two ends
curved so as to pass through the two holes in the pulley, after
which they were given a final bend to keep the pulley in place.
The method by which the shaft C was kept from working forward is
shown in Fig. 5. The washer M intervened between the bearing block
and the wire N, which was passed through the axle and then bent to
prevent its falling out. Two washers were placed on shaft C,
between the forward bearing and the hub of the wheel to lessen the
friction.

The bed plate D, Fig. 1, was 2 ft. long, 3 in. wide and 1 in.
thick and was tapered from the rear bearing to the slot in which
the fan E was nailed. This fan was made of 1/4-in. pine 18 by 12
in. and was cut the shape shown. The two small iron pulleys with
screw bases, H, Fig. 1, were obtained for a small sum from a
hardware dealer. Their diameter was 1-1/4 in. The belt which
transferred the power from shaft C to shaft G was top string, with
a section of rubber in it to take up slack. To prevent it from
slipping on the two wooden pulleys a rubber band was placed in the
grooves of each.

The point for the swivel bearing was determined by balancing the
bed plate, with all parts in place, across the thin edge of a
board. There a 1/4-in. hole was bored in which shaft G turned. To
lessen the friction here, washers were placed under pulley F. The
swivel bearing was made from two lids of baking powder cans. A
section was cut out of one to permit its being enlarged enough to
admit the other. The smaller one, 0, Fig. 6, was nailed top down
with the sharp edge to the underside of the bed plate, so that the
1/4-in. hole for the shaft G was in the center. The other lid, G,
was tacked, top down also, in the center of the board P, with
brass headed furniture tacks, R, Fig. 6, which acted as a smooth
surface for the other tin to revolve