Power loss indicator

Details Power loss indicator Power loss indicator

1975-07-21

1976-10-19

Harris, George

Communications: electrical

Systems

Call station

340373, G08B 2100

Patent

active

039874265

ABSTRACT:
A housing is supported in front of a conventional female wall socket by a conventional two-prong male plug that extends out the rear of the housing and engages the socket. A flag is pivotally secured to the housing and can be pivoted into or out of it in a vertical plane parallel to the wall socket. Normally the flag is retained in the housing. When there is an interruption in the supply of electric power to the socket, the flag will pivot out of the housing automatically.

REFERENCES:
patent: 2488824 (1949-11-01), Olie
patent: 2632887 (1953-03-01), Rusnak
patent: 2677817 (1954-05-01), Rorden et al.
patent: 2970305 (1961-01-01), Walters
patent: 3375512 (1968-03-01), Watkins et al.
patent: 3678426 (1972-07-01), Pihl
patent: 3820047 (1974-06-01), Juhnke

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