Thermostat substitution circuit device

Details Thermostat substitution circuit device Thermostat substitution circuit device

1976-10-27

1978-03-28

Davis, Jr., Albert W.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

Remotely controlled inspection means

307114, 307115, 324 73R, H01H 4100

Patent

active

040810224

ABSTRACT:
First and second wafer switches are provided in a housing. Each of the switches has a control member outside the housing for manual operation and a plurality of electrical contacts inside the housing. Selected contacts of the first wafer switch are electrically connected to a cable for independent electrical connection to first and second stage cooling lines, a fan, a source of voltage and first and second stage heating lines. Selected contacts of the second wafer switch are electrically connected to a pair of test leads and are electrically connected to a cable for independent electrical connection to defrost checking circuits. Selected contacts of the first and second wafer switches are connected to each other. A user substitutes thermostatic operation by selective operation of the control members of the first and second wafer switches after connection of the leads and the leads of the cables to the corresponding lines and circuits.

REFERENCES:
patent: 2778957 (1957-01-01), Fuchs
patent: 2835830 (1958-05-01), Rathenau
patent: 2988655 (1961-06-01), Rudolph et al.

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