Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1977-10-03
1980-01-15
Britton, Howard W.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
325133, 340147F, 340150, 340151, 340171R, 340171PF, H04B 102, H04Q 910, H04Q 912
Patent
active
041841182
ABSTRACT:
The operational status of equipment located at a base station is reported to a remote control terminal. The same audio channel that is used for sending audio signals and control signals to the base station is also used to carry the report signal. The control signals to the base station and the report signals from the base station are encoded tone burst signals. The report signal provides an indication of the proper receipt and execution of a control signal by the base station equipment. Equipment diagnostic signal and periodic checks of equipment performance are also reported by this system.
REFERENCES:
patent: 2779868 (1957-01-01), Rust
patent: 3577080 (1971-05-01), Cannalte
Michels, H., "Pulsed Tones Control A-M and F-M Stations", Electronics, Sep. 1955, pp. 132-136.
Cannalte Gary A.
Ramsland David G.
Britton Howard W.
Gillman James W.
Motorola Inc.
Pristelski James S.
Roney Edward M.
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