Switch having a safety element

Details Switch having a safety element Switch having a safety element

1997-09-05

2000-07-18

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

With diverse art-type actuator for single switch

Bimetallic with other

337 3, 337140, 337380, H01H 3700

Patent

active

060913150

ABSTRACT:
A switch has a switching mechanism, which switches at a response temperature, for opening and closing a circuit that can be connected to external terminals of the switch. In this context, the switching mechanism has a movable contact, electrically connected to one external terminal, which as a function of the temperature of a bimetallic part is in contact with a fixed contact that is electrically connected to the other external terminal. The switching mechanism further has a safety element that changes its shape into a high-temperature shape if its temperature reaches a transformation temperature which is above the response temperature. The movable contact is in contact with the fixed contact as a function of the temperature of the safety element.

REFERENCES:
patent: 4563667 (1986-01-01), Hofsass
patent: 4679023 (1987-07-01), Nelson
patent: 4885560 (1989-12-01), Niino
patent: 4990883 (1991-02-01), Escobar et al.
patent: 5670930 (1997-09-01), Hofsass et al.

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