Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With bimetallic element
Patent
1980-07-16
1982-03-09
Harris, George
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With bimetallic element
337365, H01H 3774
Patent
active
043192149
ABSTRACT:
A creepless, snap action thermostat is formed employing two movable contacts. One of the contacts is mounted to a bimetallic arm which moves as the temperature of the environment in which the thermostat is located increases. The second movable contact is mounted on a spring arm, the spring arm following the motion of the bimetallic arm upon increased heating, so as to maintain firm mating of the two contacts until the snap over point of the bimetal is reached. After snap over, the contact on the spring arm is prevented from following the contact on the bimetallic arm because of a physical stop formed in the thermostat casing.
REFERENCES:
patent: 2716175 (1955-08-01), Franklin
patent: 3430177 (1969-02-01), Audette
patent: 3443259 (1969-05-01), Wehl et al.
patent: 4149138 (1979-04-01), Pevzner et al.
patent: 4157525 (1979-06-01), Grable
Harris George
Portage Electric Products, Inc.
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