Pilot light interface for small industrial controls

Details Pilot light interface for small industrial controls Pilot light interface for small industrial controls

1992-09-14

1994-05-03

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235385, G08K 710

Patent

active

053089650

ABSTRACT:
A pilot light on a relay or other industrial control module provides human readable information with low frequency modulation and machine readable information at high frequency modulation unintelligible to the human eye. The use of the pilot light eliminates the need for a separate and space consuming human readable display and the modulation method may be a bar code modulation to be readable by commercially available bar code readers.

REFERENCES:
patent: 4329684 (1982-05-01), Monteath et al.
patent: 4423319 (1983-12-01), Jacobsen
patent: 4471218 (1984-09-01), Culp
patent: 4622681 (1986-11-01), Snell et al.
patent: 4736096 (1988-04-01), Ushikubo
patent: 4879540 (1989-11-01), Ushikubo

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