Digital logic window panel

Details Digital logic window panel Digital logic window panel

1989-03-06

1991-01-22

Ruehl, Charles A.

Communications: electrical

Systems

Signal light systems

340461, 340462, 340762, 340782, 34081501, 34081503, 34081512, G08B 500

Patent

active

049874012

ABSTRACT:
A panel having an array of backlighted windows for displaying a change in a process variable from a nominal condition to a changed condition comprising a thin, sealed frame and a circuit board with an array of LEDs interconnected for each window and a binary switch coupled to the LED array that energizes the LEDs on receipt of a binary logic signal. The panel can be operated in a stand-alone unit or be backfitted to an existing data recorder, tapping into the incoming or internal logic variable signals and power supply without disturbing the underlying function of the recorder.

REFERENCES:
patent: 3796951 (1974-03-01), Joseph
patent: 3813664 (1974-05-01), Geyer
patent: 4072273 (1978-02-01), Dupree et al.
patent: 4310832 (1982-01-01), Fitzgerald
patent: 4333084 (1982-06-01), Peterson
patent: 4509046 (1985-04-01), Yamada
patent: 4564845 (1986-01-01), Lambie
patent: 4675654 (1987-06-01), Copeland
patent: 4727353 (1988-02-01), Ruhter
patent: 4743897 (1988-05-01), Perez
patent: 4748454 (1988-05-01), Ikeda et al.
patent: 4890088 (1989-12-01), Woodell

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