Intrusion alarm screen assembly

Details Intrusion alarm screen assembly Intrusion alarm screen assembly

1988-05-27

1989-06-13

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6181, G08B 1300, H01H 316

Patent

active

048396320

ABSTRACT:
An intrusion alarm screen assembly having mounting brackets at the corners and a pair of substantially rigid opposite end piece assemblies on which the screen can be rolled up. At each corner circuit closing means acts between the bracket there and the adjacent end piece assembly to close an alarm circuit through electrical wiring in the screen only when that end piece assembly is held by the bracket.

REFERENCES:
patent: 484761 (1892-10-01), Stromberg
patent: 2092178 (1937-09-01), Murphy
patent: 3051935 (1962-08-01), Willson
patent: 4146293 (1979-03-01), Mutton et al.
patent: 4160972 (1979-07-01), La Mell et al.
patent: 4232210 (1980-11-01), Wilson
patent: 4281320 (1981-07-01), Rosenberg
patent: 4449121 (1984-05-01), Sosa
patent: 4553134 (1985-11-01), Holt

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