System for controlling indicators for switches

Details System for controlling indicators for switches System for controlling indicators for switches

1981-10-15

1984-03-13

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082522, 340365E, 340644, H04Q 900, G08B 2100

Patent

active

044370946

ABSTRACT:
A circuit coupled between an indicating pushbutton panel switch and a software-programmable processor permits program control over the effect of switch actuation and over the illumination of the indicators. The processor can disable the switch function, blanking the indicators; it can accept a manual actuation of the switch, changing the illumination; it can reject as invalid a switch actuation within a multiple-switch field, retaining the current illumination; and it can alter the illumination in the absence of switch actuation. In one embodiment the signals providing the switch and indicator status are channeled into a serial data stream and transferred to the processor input register.

REFERENCES:
patent: 3483553 (1969-12-01), Blankenbaker
patent: 3765015 (1973-10-01), Gruner
patent: 3893083 (1975-07-01), Teramura et al.
patent: 3986039 (1976-10-01), Bovitz
patent: 4287939 (1981-09-01), Pohl et al.
patent: 4350972 (1982-09-01), Perry

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