Intrusion alarm system for preventing actual confrontation with

Details Intrusion alarm system for preventing actual confrontation with Intrusion alarm system for preventing actual confrontation with

1981-06-18

1983-12-20

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340506, 340525, 340529, 340541, G08B 2900

Patent

active

044220685

ABSTRACT:
An intrusion detection system is specifically designed to avoid actual confrontation within a protected premises between a returning occupant and an intruder. The system forewarns a returning owner or occupant, before entering the premises, that an intrusion has occurred by providing a signal visible from the outside of the premises. In this manner, the owner is alerted to the possibility that an intruder may still be present within the premises, and confrontation is avoided. The system includes a test mode operable from outside the protected premises to determine if the system has been tampered with by an intruder. If no intrusion signal is observed by the returning owner, he must still test the system to ascertain if the absence of the intrusion signal is a result of no intrusion, or if it is the result of an intruder having tampered with the system, by for example, removing its power supply. An "all clear" signal observable from the outside of the premises indicates that the system is in working order and has not been tampered with or otherwise dismantled during the owner's absence.

REFERENCES:
patent: 2852766 (1958-09-01), Green
patent: 3011163 (1961-11-01), Britt
patent: 3161742 (1964-12-01), Bagno
patent: 3537094 (1970-10-01), Hawkins et al.
patent: 3833895 (1974-09-01), Fecteau
patent: 3971009 (1976-07-01), Fujiwara
patent: 3978478 (1976-08-01), Schmitz
patent: 3984825 (1976-10-01), Fujita
patent: 4047165 (1977-09-01), Andreasson et al.
patent: 4212003 (1980-07-01), Mishoe et al.
patent: 4247847 (1981-01-01), Gontowski, Jr.
"Stop Burglars Before They Enter Your Home", The Shelburne Co. , The New York Times, 3-1-81.

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