Intruder detection system

Details Intruder detection system Intruder detection system

1979-09-10

1982-12-14

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250340, 250353, 340555, 340565, G08B 1318

Patent

active

043640303

ABSTRACT:
The improved intruder detection system of the present invention, because of its sensor, optical, and electronic systems, is uniquely capable of responding only to radiation from an intruder to signal an alarm. To achieve this, the sensor and optical systems are designed and cooperate to optically reject and balance-out extraneous, nonintruder-related radiation. In addition, the electronic system detects and rejects nonintruder-related inputs by recognizing certain uniquely intruder-related characteristics of the sensor signals, and to only signal an alarm in response to inputs evidencing such characteristics. Preferably the system is designed to reliably sense the presence of an intruder in multiple zones, to be economical to manufacture, easy to install, to be battery-powered and of a long life.

REFERENCES:
patent: 2212211 (1940-08-01), Pfund
patent: 3026413 (1962-03-01), Taylor
patent: 3524180 (1970-08-01), Cruse
patent: 3760399 (1973-09-01), Schwarz
patent: 3839640 (1974-10-01), Rossin
patent: 3923382 (1975-12-01), Harding
patent: 3928849 (1975-12-01), Schwarz
patent: 3958118 (1976-05-01), Schwarz
patent: 4052716 (1977-10-01), Mortensen
patent: 4081680 (1978-03-01), Keller
patent: 4179691 (1979-12-01), Keller

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