Defrost timer having selectable defrost time

Refrigeration – Time or program actuator – Defrosting

Patent

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Details

200 38B, 200 38D, F25D 2108, H01H 708

Patent

active

041239156

ABSTRACT:
A selectable cycle defrost timer having two timing cams and two timing switches that are switched from first to second switch positions by the respective cams. The two cams rotate different numbers of times in a given time period, but the two switches are simultaneously in their second switch positions just once each given time period. Interconnection means between the two switches permits the timer to be connected into a defrost control system in such a manner that a selectable switch permits a normal defrost operation of several defrost cycles per day, or alternatively, just one energy saving defrost cycle per day.

REFERENCES:
patent: 2711456 (1955-06-01), Goodhouse et al.
patent: 3327074 (1967-06-01), Wiser
patent: 4056948 (1977-11-01), Goodhouse

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