Switch condition indicator

Details Switch condition indicator Switch condition indicator

1982-04-27

1984-11-20

Crosland, Donnie L.

Communications: electrical

Audible indication

Percussion-type sound producer

340365R, 34081523, 340644, 200308, 84169, 84464R, G08C 900

Patent

active

044841809

ABSTRACT:
The identification of the last-actuated of a plurality of parallel connected switches is provided by energizing a light source associated with the last-actuated switch and by providing a coded output signal which identifies the switch. The identification of a closed switch is accomplished through the use of logic circuitry which periodically imposes a potential difference across all of the switch associated light sources. The potential difference is sensed via the closed switch and functions as an initiation signal which causes generation of a coded output signal and maintains energization of the light source.

REFERENCES:
patent: 4051471 (1977-09-01), Hatano et al.
patent: 4092640 (1978-05-01), Satoh

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