Infrared intruder-detection system

Details Infrared intruder-detection system Infrared intruder-detection system

1993-03-22

1994-08-02

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

250221, 359159, G08B 1318

Patent

active

053349725

ABSTRACT:
In a separate type infrared intruder-detection system consisting of an infrared beam projector and an infrared detector, the infrared detector is provided with a signal transmitter for transmitting an output level of the infrared detector, while the infrared beam projector is provided with a signal receiver for receiving a signal transmitted by the signal transmitter. These additionally equipped signal transmitter and signal receiver make it possible to achieve an initial beam-axis adjustment operation by one installation operator.

REFERENCES:
patent: 3329946 (1967-07-01), Robbins
patent: 3752978 (1973-08-01), Kahl, Jr. et al.
patent: 4186388 (1980-01-01), Robinson
patent: 4253083 (1981-02-01), Imamura
patent: 4650990 (1987-03-01), Jonsson
patent: 4949075 (1990-08-01), Kurti et al.

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