Page:Popular Science Monthly Volume 57.djvu/611

Rh right, an intermediate speed is obtained, and by moving it to the left, the carriage is run at the lowest velocity. When the handle V is turned to the right, the ends M and N, which form the clutch E, Fig. 10, are separated, and at the same time the lower shaft H is moved toward M, so as to cause gear 1 to mesh into gear 2, and also 3 into 7. By this means the end N of the axle-driving shaft is rotated through the train of gears 1, 2, 3 and 7. If the handle V is turned to the left, the shaft I is moved toward M, so as to cause gear 1 to mesh into gear 4, and gear 6 into 8, the latter being secured to end N of the axle-driving shaft. The speeds obtained by these changes are in the ratio of nearly 1, 2 and 4.

Fig. 11 shows the plan of a light French carriage, which is equipped with a double cylinder motor, set in a horizontal position above the front



axle, and arranged to impart motion to the hind axle by means of belts. The motor, which is located at A, turns a vertical shaft, and this, through spur gears, rotates a horizontal fly wheel, B. Two pulleys are mounted upon the motor shaft, and from these belts run to tight and loose pulleys on a countershaft, S. From the latter the rear axle is driven through two sets of spur gearing, which give two different speeds. By means of the belts, two other speeds are obtained, thus giving, in all, four different velocities. To stop and start, the belts are shifted from the tight to the loose pulleys by a belt-shifter, f. At h, a muffling chamber is located, into which the motor exhausts, so as to reduce the noise.

The elevation and plan of one of the celebrated French racing machines, the Vallée car, is shown in Fig. 12. The motor of this machine is of sixteen horse-power capacity, has four cylinders, and is connected so as to impart motion to the hind axle by means of a single