Tapered resistor meter

Details Tapered resistor meter Tapered resistor meter

1976-12-03

1978-10-17

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324106, 73356, 338217, 350351, G01R 1900

Patent

active

041211537

ABSTRACT:
An improved analog meter is provided having no moving parts. This meter comprises a tapered resistor device having a tapered, electrically resistive element which develops a non-uniform temperature profile on electrical energization and a heat sensitive element operatively associated with the tapered resistive element. The heat sensitive medium employed is a reversible medium which either undergoes a change in color or contrast when heated to an appropriate temperature and when viewed under appropriate illumination. A method of metering employing this device is also disclosed.

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), DeKoster
patent: 4006414 (1977-02-01), Parker
Schwartz et al., Indicator, IBM Technical Disclosure Bulletin, Aug. 1960, pp. 63 & 64.

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