Disk 1 rotates continuously counterclockwise about fixed axis A and carries three equally spaced pins 2. Pawl 3 is connected by turning pair B to lever 4 which turns freely about axis A. Driven ratchet wheel 5 rotates about axis A, independently of driving disk 1. Spring 8 tends to keep pawl 3 engaged to wheel 5 with its other end in the path of pins 2. As a pin 2 runs against pawl 3, it rotates the pawl together with ratchet wheel 5. This continues until pin 6 on pawl 3 engages fixed cam 7, turning the pawl out of engagement with wheel 5 and allowing pin 2 to pass the pawl. Then wheel 5 has a dwell until the next pin 2 runs against the end of pawl 3.
$2744$RG,D$