Emhart Industries, Inc.

Robert L Eder

Donald L Ray

William J Hueber

R Keith Cearlock

A clutch assembly permits a manual setting of a timing mechanism camstack by an appliance operator and at the same time insures that the camstack cannot be manually set during the time that electrical power is being supplied to the timing mechanism. The assembly includes a support and a camstack, a shaft and a bearing mounted in the support for rotation about a common axis. First clutch teeth are integrally formed within the bearing and second clutch teeth are integrally formed within the shaft. The bearing is mechanically coupled to the camstack via tangs on the camstack which pass through channels in the bearing. The shaft is axially movable from a first position in which the first and second teeth are engaged to a second position in which the teeth are disengaged. The ends of the teeth are formed and arranged so that no matter what relative rotational position about the axis the first teeth are with respect to the second teeth when the shaft is moved axially from the second position toward the first position, the teeth will engage.

Timing mechanism with improved clutch assembly

A timing mechanism comprising a camstack having a hollow hub rotatably mounted between support plates, electrical switches actuated by the camstack as it rotates, a bearing having a bore in it and rotatably journalled in one of the support plates, and a shaft mounted axially in the camstack with one end rotatably supported in the bearing and the other end in the other of the support plates. The shaft is axially movable between a first position and a second position, which positions are determined by a detent assembly comprising two grooves in the shaft and spring fingers located in the bore of the bearing. The fingers engage one groove when the shaft is in the first position and the other groove when the shaft is in the second position.

Shaft detent assembly for a timing mechanism

An intermittent drive includes a pair of reciprocating drive pawls which individually and alternately drive a camstack in a step by step maneuver. Electrical switches open and close in response to the camstack. One of the drive pawls includes a lost motion connection between it and a rotating member. There is a sub-interval switch having a cam disposed within the intermittent drive and a cam follower which operates a switch.

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Speedway, IN, United States of America

Robert L Eder