Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – Expansible or vaporizable fluid actuated
Patent
1990-04-18
1992-11-10
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
Expansible or vaporizable fluid actuated
337117, 337319, H01H 3738, H01H 3712
Patent
active
051627744
ABSTRACT:
A remotely changeable thermostat for a refrigeration or air conditioning system and method and system employing same. The thermostat has a fluid filled capsule with a diaphragm movably responsive to fluid expansion and contraction for actuating, via lever means, a compressor power switch. The capsule senses temperature via a fluid filled capillary. A separate remote user activated switch energizes an electrical actuator for moving the fulcrum of the lever means to change the sensed temperature of the evaporator at which the power switch is actuated. The user activates a remote switch to energize an electrical heater coil for heating a bimetal strip which moves the fulcrum for the lever means between a high or low temperature setting for compressor power switch actuation in response to user opening or closing the remote heater switch.
REFERENCES:
patent: 2956397 (1960-10-01), Hottenroth, Jr.
patent: 3207868 (1965-09-01), Kuhn et al.
patent: 4510480 (1985-04-01), Rossi et al.
Broome Harold
Eaton Corporation
Johnston R. A.
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