Thermal cutout fuse

Details Thermal cutout fuse Thermal cutout fuse

1980-09-22

1982-03-30

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337409, H01H 3776

Patent

active

043227058

ABSTRACT:
A thermal cutout fuse comprises a fuse housing, a first lead wire penetrated into the housing interior, a movable contact capable of being turned aslant in the radial direction and energized constantly in the horizontal direction, the movable contact connected to the leading end of the first lead wire, a stationary contact disposed so as to encircle the movable contact, a second lead wire connected to the stationary contact, a solid thermally sensitive pellet capable of melting at a prescribed unsafe temperature, the thermally sensitive pellet disposed inside the housing opposite the movable contact, and a stopper adapted to turn the movable contact aslant and keep it in contact with the stationary contact, the stopper interposed between the thermally sensitive pellet and the movable contact. When the ambient temperature of the fuse reaches the prescribed unsafe level and the thermally sensitive pellet melts, the stopper is deprived of its force tending to press down the movable contact and the movable contact is consequently is sprung up into its horizontal position. Thus, the movable contact is instantaneously separated from the stationary contact.

REFERENCES:
patent: 3781737 (1973-12-01), Henry

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