stened to the wheel, C, engages with the toothing, pinion, D, through the intermedium of the rack arm, stant conditions of angular velocity of the pedals, of C, actuated by the wheel, B, and axis, A. This pinion D, and renders the entire affair immovable. But if pressure upon the pedals and of… … mechanism acts during the entire time, and is single chain to pass alternately, according as it Fig. l.-THE PEGASUS SYSTEM OF DOUBLE CHAIN CHANGE suppressed at a slow speed. In such a com- OF SPEED. was desired to obtain a high or a low speed. In order to cause the chain to pass from one bination…
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