Measuring device with variable color display

Details Measuring device with variable color display Measuring device with variable color display

1990-05-24

1991-10-15

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural ranges, scales or registration rates

324 96, 340701, G01R 1508, G01F 2324

Patent

active

050577689

ABSTRACT:
A measuring device includes a variable color display for indicating measured values of an input signal. A comparator and a color control circuit are provided for controlling the color of the display in accordance with the relation of the measured value of the signal to predetermined limits.

REFERENCES:
patent: 2643344 (1953-06-01), McLaren et al.
patent: 2682000 (1954-06-01), Clayton et al.
patent: 2889518 (1959-06-01), Hudson et al.
patent: 3740570 (1973-06-01), Kaelin et al.
patent: 3840873 (1974-10-01), Usui
patent: 4360804 (1982-11-01), Ohura
patent: 4438498 (1984-03-01), Sekel et al.
patent: 4484187 (1984-11-01), Brown et al.

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