WIND POWER.
One good use to which the wind force obtained from a fan motor can be put is shown in Figs. 1 and 2. In Fig. 1 is a section of a water tank, which tank should sit in the show window, filled with water.
A toy ship is on the water and is guided in a track, A, which track is attached to bottom of tank. Guide wires, B, B, extend from the ship to grooves in the track. Fans, C, C, are set up at each end and are covered with window trimmings in front so that they are not in view. The fans are run by means of cords from the motor. The arrangement of the fans is as shown in the top view of the tank in Fig. 2. The fan at the left is at D, and the wind it produces sends the ship across the tank at opposite side, on line with the arrow. The grooved track holds the guide wires B, B, of the ship, and steers the ship around G, and the momentum carries the ship to H, where the blast of air from the fan at E sends the ship along course I to J, and thence opposite D again, where the course is commenced over again.
PERPETUAL MOTION.
A perpetual motion wheel never fails to attract attention in a show window. There is one form of perpetual wheel device which can be made very easily, as it consists of a simple mechanism such as is shown here.
The wheel is three feet in diameter, of light wood and crude construction, provided with eight arms disposed radially so as to be separated by angles of 45 degrees, as shown. The axle is supported in bearings of wood. Each arm is provided with a movable weight of five pounds, being movable on a pivot or hinge on the arms so as to transfer the weight from the axis to the periphery, whereby, as it appears to the eye, the wheel is continually overweighted on one side, and revolves slowly. Attached to the base, A, is an upright piece of wood, B, and a spring hooked wire, G, extends from the top of this to the point D. Here the hook part tips up the weights as they come around in turn, causing each to drop over on its arm, thus placing the weight further from the center, and making the wheel turn. The center of gravity of the wheel varies from a point on the left of the center to a point at an equal distance on the right, according to the location of the arms at the particular point in the rotation of the wheel. The wheel can be draped with light goods and made attractive. The notice “Perpetual Motion” should be attached on a card.
MECHANICAL HANDKERCHIEF DISPLAY.
We show a picture of a mechanical handkerchief display in which the central figure is a girl in a canoe, who works the paddle by a simple device.