Electric sign

Details Electric sign Electric sign

1986-07-31

1988-02-16

Wilson, John J.

Card, picture, or sign exhibiting

Changing exhibitor

Door latch operated

40359, G09F 1904

Patent

active

047246308

ABSTRACT:
An electric sign is arranged to afford a readily observable visual indication of the condition of an establishment such as a retail establishment having an entrance door provided with a lock and wherein the sign includes a visual device for indicating a condition of the establishment such as "closed" or "open" together with a switch for energizing the visual device, and a control mechanism actuated in coordination with locking and unlocking of the establishment door for selectively controlling the control mechanism for energizing the visual device.

REFERENCES:
patent: 6722 (1849-09-01), Doughty
patent: 24051 (1859-05-01), Page
patent: 1362647 (1920-12-01), Stone et al.
patent: 1451877 (1923-04-01), Koehler et al.

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