Drive and clutch for a timing mechanism

Details Drive and clutch for a timing mechanism Drive and clutch for a timing mechanism

G - Physics

05

G

74/2, 306/271

G05G 21/00 (2006.01) F16H 31/00 (2006.01)

Patent

CA 1112901

Abstract of Disclosure A pair of ratchets are coupled to a camstack with each ratchet being driven by a separate drive pawl. A no back clutch, that is associated with the camstack to prevent its reversal during its advancement, comprises an annular member having a multiplicity of individual pawls engaging a multi-tooth ratchet coupled to the camstack. A spring biased lever and a spring biased actuator coupled to the lever engages one of the drive pawls so that the drive pawl can be disengaged from its ratchet for at least a portion of a program cycle.

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