Thermo-switch

Details Thermo-switch Thermo-switch

1980-01-28

1981-10-13

Harris, George

Electricity: electrothermally or thermally actuated switches

With separate distinct diverse art-type switching device

Bimetallic device with other

337354, 337364, H01H 6101

Patent

active

042951143

ABSTRACT:
A thermostatic switch (10) employs a switch blade (22) having spaced thereon a set of service contacts (16, 20).
One end of the blade is supported by a heat collapsible support (46) and a second set of contacts (26, 24), the contact sets being electrically in series. The service contacts are actuated by a slider (30) driven by a bi-metallic heat sensing element (32). A spring loaded button (52) biases the blade (22) against the collapsible support. Both sets of contacts (16, 20), (26, 24) are normally closed and upon the thermostat experiencing excessive temperatures the heat-collapsible support yields to the force of the bias spring (54) and causes the second set of contacts (26, 24) to open irrespective of the condition of the service contacts (16, 20).

REFERENCES:
patent: 3700969 (1972-10-01), Furnival
patent: 3715697 (1973-02-01), Them

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