Progressively shorted tapered resistance device

Details Progressively shorted tapered resistance device Progressively shorted tapered resistance device

1977-04-21

1978-11-21

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 96, 324106, 338 25, 338217, 338314, G01R 2702

Patent

active

041268245

ABSTRACT:
A progressively shorted tapered resistance device including a body of material which undergoes an irreversible resistance decrease when heated beyond a threshold temperature in operative association with a tapered electrical resistance element which develops a non-uniform temperature profile when electrically energized. Upon sufficient energization, the tapered resistor element will cause portions of the heat sensitive material to be heated beyond its threshold temperature resulting in a shorting out of a portion of the tapered resistance element. The amount of the tapered resistance element shorted out is measured at low currents to provide an indication of the energizing current.

REFERENCES:
patent: 2755457 (1956-07-01), Diemer et al.
patent: 3149281 (1964-09-01), Lieb
patent: 3244979 (1966-04-01), Hershinger
patent: 3524726 (1970-08-01), Koster
patent: 4006414 (1977-02-01), Parker
Schwartz et al., Indicator, IBM Technical Disclosure Bulletin, Aug. 1960, pp. 63 & 64.

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