Thermostatic switch with sinuous bimetal blade

Details Thermostatic switch with sinuous bimetal blade Thermostatic switch with sinuous bimetal blade

1990-08-13

1991-12-31

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337111, 337362, H01H 3752, H01H 7116

Patent

active

050775359

ABSTRACT:
A thermostatic switch has a bimetallic member formed with an undulated section for causing both an axial and a radial displacement of the bimetallic member such that each time the member expands a first contact wipes across a second contact. By providing sufficient undulations, the wiping action occurs prior to and after separation of the contacts preventing the build-up of a resistive residue which could interfere with switch operation. Utilizing the undulated bimetallic section in a thermostatic switch increases the life of the contacts and reduces variations in temperature responsiveness.

REFERENCES:
patent: 3223809 (1965-12-01), Wehl
patent: 3656080 (1972-04-01), Wells

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