Infrared motion alarm

Details Infrared motion alarm Infrared motion alarm

1986-09-02

1988-06-21

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

250342, 250353, G08B 1318

Patent

active

047527692

ABSTRACT:
The invention is directed to an infrared motion alarm characterized by an infrared detector and an optical arrangement before the detector in the radiation direction for focussing the infrared radiation onto the detector. The optical arrangement is formed by a mirror arrangement and by a lens arrangement with the mirrors being on different levels so the different beam paths are being detected to prevent an intruder from crawling under the infrared detection beam paths.

REFERENCES:
patent: 3631434 (1971-12-01), Schwartz
patent: B13703718 (1972-11-01), Berman
patent: 3703718 (1972-11-01), Berman
patent: 3766539 (1973-10-01), Bradshaw et al.
patent: 4321594 (1982-03-01), Galvin et al.
patent: 4429224 (1984-01-01), Wagli et al.
patent: 4588988 (1986-05-01), Karas
patent: 4612442 (1986-09-01), Toshimichi

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