Thermal cutoff with floating contact member

Details Thermal cutoff with floating contact member Thermal cutoff with floating contact member

1994-06-06

1996-06-25

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337413, 200239, H01H 3776, H01H 3764, H01H 114

Patent

active

055304176

ABSTRACT:
A thermal cutoff having a mushroom-shaped floating contact member with an enlarged head and an elongated shank. The outwardly facing end of the enlarged head has a centrally located depression for reducing the area of the head end surface that engages a sliding contact for the purpose of increasing contact pressure and thereby reducing electrical resistance. The shank has a necked-in terminal end portion to facilitate assembly by minimizing the possibility that the shank end will hang up on a bushing that receives the shank. The head is enlarged sufficiently to accept a straight coil spring as well as a tapered coil spring.

REFERENCES:
patent: Re29391 (1977-09-01), Kawiecki
patent: 3274361 (1966-09-01), Ebensteiner
patent: 3291945 (1966-12-01), Merrill
patent: 3462572 (1969-08-01), Sofianek
patent: 3519972 (1970-07-01), Merrill
patent: 4152564 (1979-05-01), Wirz
patent: 4246564 (1981-01-01), Olson
patent: 4514718 (1985-04-01), Birx
patent: 4707044 (1987-11-01), Burns

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