Combination analog-digital indicator

Details Combination analog-digital indicator Combination analog-digital indicator

1981-02-02

1983-11-15

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural meters

324 96, G01R 100, G01R 108

Patent

active

044158556

ABSTRACT:
An electrical indicator device for providing simultaneous relatively coarse analog, and higher-resolution, digital readings of a particular electrical parameter, all in one instrument. The device includes either a d'Arsonval meter movement or a servo-motor or other motivated electro-responsive device which carries a pointer movable over a predetermined portion of a calibrated meter scale plate, and a liquid crystal display having multiple digits, each digit being constituted of multiple segments. The segments are disposed completely within the confines of the meter scale plate, but lie substantially completely outside of the said predetermined portion thereof. The display is driven or energized by a digital voltmeter having its terminals connected to receive and monitor the same parameter that is being measured by the motivated electro-responsive device. The arrangement is such that the individual segments of the digital display are always completely visible regardless of the position which the pointer occupies with respect to the said predetermined portion of the scale plate.

REFERENCES:
patent: 2623182 (1952-12-01), Russell
patent: 3421083 (1969-01-01), Bosworth et al.
patent: 3689835 (1972-09-01), Bickford

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