Single terminal detection system

Details Single terminal detection system Single terminal detection system

1978-11-13

1980-09-23

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

250225, 340507, 340600, G08B 1318

Patent

active

042246083

ABSTRACT:
A single terminal detection system of the beam variety is provided with polarizing filters to sense "near-field" problems. One filter polarizes radiation reflected back to the transceiver component and a second filter, positioned within the transceiver, polarizes radiation before it is incident upon one of two radiation detectors. Circuitry, operatively coupled to the detectors, actuates an alarm in the event either an alarm condition or a near-field problem exists.

REFERENCES:
patent: 3443072 (1969-05-01), Mori
patent: 3653021 (1972-03-01), Litman et al.
patent: 3816745 (1974-06-01), Primm et al.
patent: 3875403 (1975-04-01), Svensson
patent: 3944818 (1976-03-01), Bechtel

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