Drive and clutch for a timing mechanism

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

1979-08-06

1980-10-21

Staab, Lawrence J.

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

74568T, F16H 2704

Patent

active

042286905

ABSTRACT:
A pair of ratchets are coupled to a camstack with each rachet 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.

REFERENCES:
patent: 2256466 (1941-09-01), Cullin
patent: 3156123 (1964-11-01), Denny
patent: 3626117 (1971-12-01), Stafford
patent: 3857293 (1974-12-01), Godwin et al.
patent: 4125074 (1978-11-01), Sato

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