Temperature responsive switch

Details Temperature responsive switch Temperature responsive switch

1983-02-10

1984-10-09

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337347, 337368, H01H 3726

Patent

active

044764537

ABSTRACT:
A temperature responsive switch has a bimetal-and-spring arrangement carrying a movable contact and having a first stable state urging the movable contact towards a stationary contact into an ON position and a second stable state urging the contacts away from one another into an OFF position; and a setting shaft setting the bimetal-and-spring arrangement to a desired temperature value at which the bimetal-and-spring arrangement displaces the movable contact from the ON position into the OFF position. The setting shaft has a relatively low temperature setting range and a relatively high temperature setting range. The switch further has a stopping mechanism having an operative and an inoperative state for preventing the bimetal-and-spring arrangement from assuming the second stable state in the operative state of the stopping mechanism and for allowing the bimetal-and-spring arrangement to assume the second stable state in the inoperative state of the stopping mechanism. The setting shaft places the stopping mechanism in its operative state in the low temperature setting range and places the stopping mechanism in its inoperative state in the high temperature setting range.

REFERENCES:
patent: 3569893 (1971-03-01), Pembrook
patent: 3878498 (1975-04-01), Allen et al.
patent: 4345389 (1982-08-01), Balchunas et al.

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