Flexible blown fuse indicator

Details Flexible blown fuse indicator Flexible blown fuse indicator

1997-07-17

1998-10-13

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337160, 337297, H01H 4530, H01H 85046

Patent

active

058218491

ABSTRACT:
A device for providing a visual indication of the status of a fuse, i.e., whether or not the fuse has blown. The device includes a substrate onto which the elements of the visual indication device are printed. A pair of conductive terminals is screen printed upon that substrate, preferably spaced apart from each other along that substrate. Between the terminals, at least two spaced apart resistance elements are positioned upon the substrate. These two resistance elements are in series with each other, and they are also in series with the pair of conductive terminals. The first of these at least two resistance elements is comprised of a combination of a substance which melts at an elevated temperature, and also of carbon. The second of these at least two resistance elements is comprised solely of carbon.

REFERENCES:
patent: 4706059 (1987-11-01), Schmitt
patent: 5091712 (1992-02-01), Suuronen
patent: 5111177 (1992-05-01), Krueger et al.
patent: 5418516 (1995-05-01), Oh
U.S. application No. 08/842,964, Dietsch et al., filed Apr. 25, 1997.

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