Ratchet means switch operator

Details Ratchet means switch operator Ratchet means switch operator

H - Electricity

01

H

306/260, 342/19.

H01H 43/04 (2006.01) G05D 23/275 (2006.01) H01H 13/58 (2006.01) H01H 37/12 (2006.01)

Patent

CA 1289226

Abstract of the Invention A switch operator has a low friction ratchet driven by a low power time programmed clock to operate the switch in one position or another depending upon the position of the ratchet to operate the ratchet independent of the time programmed clock. A pawl resiliently held and biased away from the ratchet engages the ratchet when moving in a forward direction to move it a pre- determined amount. A cam member mounted adjacent the ratchet is engaged by the pawl to bias the pawl against a projection on the ratchet when the pawl is moved forward and to bias the pawl away from the ratchet upon its return movement.

574923

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