Intruder deterrent system

Communications: electrical – Condition responsive indicating system – Specific condition

Reexamination Certificate

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C340S541000

Reexamination Certificate

active

07872585

ABSTRACT:
A system and a method for operating an intruder deterrent system by which a smoke screen is generated in response to an intruder being detected, a smoke screen generator operatively linked to the intruder detecting. To achieve an intruder deterrent system that can operate for a longer period after interruption in the power supply, latent heat is stored in a heat storage, and smoke can be generated by transferring the latent heat from the heat storage to a liquid, which liquid is evaporated. The use of the heat storage has led to the unexpected result that the smoke generator can operate independently of power to the heating elements for a very long period.

REFERENCES:
patent: 4871115 (1989-10-01), Hessey
patent: 5331822 (1994-07-01), Belliveau et al.
patent: 5394139 (1995-02-01), Dards
patent: 5676886 (1997-10-01), Fleming
patent: 6094135 (2000-07-01), Sugimoto et al.
patent: 7297045 (2007-11-01), Pierson et al.
patent: 0659293 (1995-06-01), None
patent: 20040074227 (2004-08-01), None
patent: 9904818 (2001-06-01), None
Danish Office Action dated Jul. 2, 2008.

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