Switch having a temperature-dependent switching member and a sub

Details Switch having a temperature-dependent switching member and a sub Switch having a temperature-dependent switching member and a sub

1999-02-10

2000-08-01

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337333, 337365, 337372, H01H 3752, H01H 3754, H01H 3760

Patent

active

060972742

ABSTRACT:
A switch comprises a first and a second external terminal as well as a temperature-dependent switching mechanism that creates, as a function of its temperature, an electrically conductive connection between the two external terminals for an electrical current to be conducted through the switch. The switching mechanism comprises a switching member which changes its geometrical shape between a closed position and an open position as a function of temperature and, in its closed position, carries the current flowing through the switch. The switching mechanism further comprises a spring element which is permanently connected electrically and mechanically in series with the switching member. The displacing force of the spring element is substantially temperature-independent, the switching member having a temperature-dependent displacing force which, in its creep phase, is greater than the displacing force of the spring element.

REFERENCES:
patent: 2139921 (1938-12-01), Weinhardt
patent: 2503008 (1950-04-01), Taylor
patent: 3443259 (1969-05-01), Wehl et al.
patent: 3706952 (1972-12-01), Alley
patent: 4319214 (1982-03-01), Givler
patent: 4363016 (1982-12-01), Unger
patent: 4389630 (1983-06-01), Ubukata et al.
patent: 4620175 (1986-10-01), Karr et al.
patent: 4636766 (1987-01-01), Carbone et al.
patent: 4843363 (1989-06-01), Ubukata et al.
patent: 5212465 (1993-05-01), Mizutani et al.

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