Controllable fuse

Details Controllable fuse Controllable fuse

1990-10-01

1992-01-28

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337166, 337232, H01H 8504

Patent

active

050846914

ABSTRACT:
A controllable fuse (10; 40; 50; 60; 80) has a pair of isolated conductor pads (26, 27), a solder connection (32; 41; 51) connected to the pads and providing a circuit connection therebetween, and at least one heater (14; 70, 75) to produce heat in response to an electrical signal. When sufficient heat is provided, the solder connection will desolder and disconnect the circuit connection between the conductor pads (26, 27). Major features are that the conductor pads and the heater are provided on a planar surface(s) (19, 25) as planar films and that redundancy for the fuse can be implemented by providing more than one heater (70, 75). A preferred manufacturing method for the fuse is disclosed which utilizes a solder retaining structure. Several fuse configurations are illustrated.

REFERENCES:
patent: 3763454 (1973-10-01), Zandonatti
patent: 3978443 (1976-08-01), Dennis et al.
patent: 4031497 (1977-06-01), Ozawa
patent: 4053861 (1977-10-01), Knapp, Jr.
patent: 4208645 (1980-06-01), Harmon
patent: 4494104 (1985-01-01), Holmes

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