Intruder detection apparatus for functioning free of disturbance

Details Intruder detection apparatus for functioning free of disturbance Intruder detection apparatus for functioning free of disturbance

1983-06-30

1984-11-20

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340501, G08B 1324

Patent

active

044841825

ABSTRACT:
In the receiver of an outdoor intruder detection apparatus, which receiver is spaced from and receives signals from a microwave transmitter and provides an alarm output upon the occurrence of change in the received signal, eliminator means is provided for eliminating pulses which may be superimposed on the signals from nearby radar. Such eliminator means comprises a wide band amplifier which serves, by way of a monostable to actuate a switch which gates out, in synchronism with the superimposed pulses, the detected signals from an aerial and diode as supplied by way of amplifiers and a delay line to further signal-processing circuitry.

REFERENCES:
patent: 3465336 (1969-09-01), Fishbein et al.
patent: 3696379 (1972-10-01), Minasy
patent: 3839709 (1974-10-01), Sugiura
patent: 3943503 (1976-03-01), Whitman
patent: 4010459 (1977-03-01), Pontoppidan et al.
patent: 4117466 (1978-09-01), Lichtblau
patent: 4322722 (1982-03-01), Kozdon

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