Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1975-05-27
1976-12-21
Claffy, Kathleen H.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340 27R, 340248B, 179 1VE, G08B 310, G08B 108
Patent
active
039990150
ABSTRACT:
An aircraft communication system adapted to provide a plurality of communication paths from respective inputs to a plurality of outputs, the communication paths being flexible in arrangement and operator control. For use in an aircraft, the system combines an intercom for voice transmission between pilot, co-pilot and passengers, along with channels for external radio reception and transmission by pilot and co-pilot. The system also provides enabling of transducer outputs only upon detection of input signals above a given threshold, and automatic monitoring of aircraft supply voltage conditions with visual and audio outputs. Specific features of the invention include: (a) audio source input circuits feed a common point which is connected to a threshold VOX switch circuit; (b) the VOX switch circuit controls a recorder, additional audio inputs, and a master amplifier circuit inputted from the common point and connectable to output transducers, whereby signals from the audio sources are outputted only when the common point signal exceeds the predetermined threshold; and (c) the audio source input circuits include aircraft power supply high and low detection circuitry.
REFERENCES:
patent: 2873073 (1959-02-01), Lekas
patent: 3581014 (1971-08-01), Vogel
patent: 3739376 (1973-06-01), Keledy
Paules Eugene H.
Snyder Dennis G.
Claffy Kathleen H.
Genie Electronics Co., Inc.
Kemeny E. S. Matt
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