Smoke screen intruder deterrent system

Communications: electrical – Condition responsive indicating system – Specific condition

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Details

102334, 340691, G08B 1502

Patent

active

053941390

ABSTRACT:
An intruder deterrent system of the type which generates a smoke screen and which includes an intruder detector, a smoke screen generator operatively linked to the intruder detector means and the smoke screen generator to activate the smoke screen generator when the intruder detector is triggered; and smoke screen density regulator having a smoke screen density sensor to sense the density of the smoke screen and a controller responsive to the sensed density to adjust the output of the smoke screen generator means to maintain the smoke screen density at a desired level.

REFERENCES:
patent: 3432439 (1969-08-01), Dickman
patent: 3772687 (1973-11-01), Scott
patent: 4531114 (1985-07-01), Topol et al.
patent: 4998479 (1991-03-01), Perham et al.
patent: 5182541 (1993-01-01), Bajorek et al.
JEM Smoke Machine Co. Ltd., The Catalogue 90/91.

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