Safety system

Details Safety system Safety system

1974-03-18

1976-02-24

Pendegrass, Verlin R.

Locks

Operating mechanism

Using a powered device

42 70R, 340274R, E05B 4700, F41C 1700, G08B 1308

Patent

active

039396797

ABSTRACT:
Normally disabled electrical and mechanical devices are caused to be enabled to operate by remote control signals having predetermined distinctive characteristics, such signals originating from enabling control equipment transported by an authorized person or persons. Receiving equipment providing output enabling signals only in response to received signals having the predetermined distinctive characteristics is preferably made integral with the mechanical or electrical devices involved and is coupled through appropriate electronic or electromechanical devices to the disabling means in the mechanical or electrical devices to be enabled.

REFERENCES:
patent: 2936607 (1960-05-01), Nielsen
patent: 3093994 (1963-06-01), Richard
patent: 3144761 (1964-08-01), Lee
patent: 3168737 (1965-02-01), Weinstein
patent: 3184937 (1965-05-01), Sher
patent: 3225265 (1965-12-01), Krause et al.
patent: 3344629 (1967-10-01), Burney
patent: 3392559 (1968-07-01), Hedin et al.
patent: 3725939 (1973-04-01), Saltzstein
patent: 3733861 (1973-05-01), Lester
patent: 3769514 (1973-10-01), Clark, Jr.

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