Printed circuit fuse

Details Printed circuit fuse Printed circuit fuse

1982-12-27

1984-10-16

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361118, 361 56, 361 55, 361111, 361124, 361104, 361399, 361402, 179170R, H02H 906

Patent

active

044778570

ABSTRACT:
Apparatus for preventing a fire in electrical equipment when a relatively constant overvoltage condition appears on an input line comprises a meltable fuse in the line and a surge arrestor connected between the equipment side of the fuse and ground. The surge arrestor is physically located adjacent the fuse for melting the latter and open circuiting the line when the overvoltage condition is present for greater than a net prescribed time interval. In a preferred embodiment, the line adjacent the electrical equipment is a printed conductive line on one side of a circuit board, with the fuse comprising a gap in the printed line that is bridged with a bead of solder. The surge arrester is located under the solder bridge, with one of its leads extending through the board and connected to the printed conductor within the solder bridge.

REFERENCES:
patent: 4160210 (1979-07-01), Molinari
patent: 4191985 (1980-03-01), Phillips, Jr.
patent: 4317154 (1982-02-01), Passarella
patent: 4379318 (1983-04-01), Ootsuka
patent: 4394639 (1983-07-01), McGalliard

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