Snap-action cam for timer switch

Details Snap-action cam for timer switch Snap-action cam for timer switch

1977-04-11

1978-12-19

Scott, James R.

Electricity: circuit makers and breakers

Retarded

Clock train

62157, 74567, 200 38D, 200153LB, H01H 4310, G05D 2332, F16H 5300, H01H 332

Patent

active

041307461

ABSTRACT:
A snap-action camming means for use in controlling a double throw electrical switch. The switch may be biased to a first condition and substantially instantaneously thrown to a second operating condition by a spring associated with the cam. A single cam and cam follower are utilized to provide substantially positive throwing of the switch in both directions so as to avoid a dead break condition wherein the switch is maintained in an intermediate position between the two operating conditions. In one embodiment, the spring is formed integrally with the cam. The spring may be arranged to position the cam follower suitably to be maintained by subsequent engagement thereby with a portion of the cam.

REFERENCES:
patent: 3057973 (1962-10-01), Goodhouse
patent: 3107281 (1963-10-01), Tufts
patent: 3814874 (1974-06-01), Brown

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