Heat operated protective switch

Details Heat operated protective switch Heat operated protective switch

1980-04-30

1981-12-15

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337365, 337380, H01H 6100

Patent

active

043062113

ABSTRACT:
A heat operated protective switch, with a housing, with a bimetallic snap disc guided peripherally in the housing, with a contact adapted to be operated by the bimetallic snap disc, and also with an associated contact. The contact and the associated contact are connected in electrically conductive manner to one another by way of contact surfaces in a low temperature position while when a predetermined temperature is exceeded the bimetallic snap disc snaps over into a high temperature position and lifts the contact away from the associated contact. The contact has a circumferential edge whereby its contact surface coming into contact with the associated contact is set off sharply from the bimetallic disc. Thus operationally caused impairment of the switch-over behavior of the bimetallic snap disc, more particularly impairment caused by switching sparking is obviated.

REFERENCES:
patent: 4149138 (1979-04-01), Pevzner et al.
patent: 4157525 (1979-06-01), Grable

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