Burglar warning device

Details Burglar warning device Burglar warning device

1975-07-02

1976-07-06

Swann, III, Glen R.

Communications: electrical

Systems

Call station

116 86, 200 6193, G08B 1308

Patent

active

039684857

ABSTRACT:
A twine or cord is stretched across an entrance and secured at one end to one side of the entrance and at the other end linked loosely to an electric light switch near the other side of the entrance so that upon opening the entrance by way of a door by burglar or intruder the switch is activated by a pull on the cord, and thence the switch, and thereafter the link slips off the switch to prevent breakage of the cord.

REFERENCES:
patent: 676744 (1901-06-01), Gatten
patent: 886355 (1908-05-01), Dawson
patent: 991219 (1911-05-01), Maynard
patent: 1242547 (1917-10-01), Harrington
patent: 1464788 (1923-08-01), Wakefield, Sr.
patent: 2636091 (1953-04-01), Carter

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