Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1988-09-09
1989-08-08
Pellinen, A. D.
Electricity: circuit makers and breakers
Retarded
Clock train
74568T, 200 38A, H01H 708
Patent
active
048560960
ABSTRACT:
A programmer/timer for an appliance of the type having a rotatable cam drum advanced for sequential actuation and deactuation of a plurality of electrical switches. The drum is advanced or indexed intermittently by an oscillating advance pawl engaging a ratchet wheel and also continuously by a gear driven by a common motor for oscillating the advance pawl. The ratchet wheel has a hub which is frictionally engaged to drive the cam drum. The driven gear in turn is frictionally engaged with the hub to also drive the ratchet wheel. When the advance pawl engages the ratchet wheel for intermittent drive, the driven gear slips on the ratchet hub. Upon user selection, a separate cam track lifts the advance pawl to permit the driven gear to continuously drive the ratchet wheel.
REFERENCES:
patent: 4366352 (1982-12-01), Obermann
patent: 4611103 (1986-09-01), Elder
Aigner Robert K.
Mahon Joseph J.
Eaton Corporation
Ginsburg Morris
Johnston R. A.
Pellinen A. D.
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