Ratchet means switch operator

Details Ratchet means switch operator Ratchet means switch operator

1987-09-24

1988-11-29

Pellinen, A. D.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With mechanical timing means

200 33R, 236 47, H01H 3762

Patent

active

047885203

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

REFERENCES:
patent: 693275 (1902-02-01), Jones et al.
patent: 830862 (1906-09-01), Swallow
patent: 2639095 (1953-05-01), Cubberley
patent: 3749871 (1973-07-01), Stoll et al.
patent: 3889088 (1975-06-01), Zdanys et al.
patent: 3917165 (1975-11-01), Cross
patent: 4150264 (1979-04-01), Lieberman
patent: 4197440 (1980-04-01), Debaigt
patent: 4447689 (1984-05-01), Schiller
Honeywell Brochure 60-2416-4, (Rev. 5-81), entitled "Chronotherm Fuel Saver Thermostat and Subbase-T8082A, Q682A,B".

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