Portable, gravity-actuated alarm for use with a window or door

Details Portable, gravity-actuated alarm for use with a window or door Portable, gravity-actuated alarm for use with a window or door

1974-12-09

1976-01-13

Swann, III, Glen R.

Communications: electrical

Systems

Call station

340283, G08B 1308

Patent

active

039328562

ABSTRACT:
This portable, self-contained alarm device for a door or window is usable in one position with an inwardly-opening door or window or, in a different position, with an outwardly-opening or sliding door or window. It has a pivoted lever arranged to drop by gravity and close a magnetic switch when the door or window is opened. The alarm device may be positioned next to the door or window, or remote from it for operation by a pull cord.

REFERENCES:
patent: 3029425 (1962-04-01), Forrester
patent: 3312968 (1967-04-01), Kiefer, Jr.
patent: 3696380 (1972-10-01), Murphy

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