Thermally responsive switch

Details Thermally responsive switch Thermally responsive switch

1992-09-24

1993-06-22

Broome, Harold

Electricity: electrothermally or thermally actuated switches

With diverse art-type actuator for single switch

Bimetallic with other

337 3, 337 4, 337140, 337299, H01H 3700, H01H 7118, H01H 3702

Patent

active

052219143

ABSTRACT:
A thermally responsive switch for protecting electric motors against overcurrent and overheating conditions includes a metallic receptacle having an elongated dome-shaped portion and an opening opposite to the dome-shaped portion, a metallic header plate secured to the one end of the receptacle so as to hermetically close the opening afterwards and having a through-aperture, a thermally responsive element disposed in the receptacle in parallel with the header plate and carrying a movable contact at one end, a rod terminal secured in the aperture of the header plate by an electrically insulating material filled in the aperture for hermetic sealing so that the terminal extends through the aperture, a fixed contact support disposed in the receptacle to be perpendicular to the terminal and having an end to which a fixed contact is secured, the support being connected at the other end to the end of the terminal projected into the receptacle, by solder, and a spring for urging the support so that it is disconnected from the terminal.

REFERENCES:
patent: 4295114 (1981-10-01), Pohl
patent: 4472705 (1984-09-01), Carlson
patent: 4876523 (1989-10-01), Kushida et al.

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