Communications: electrical – Selective – Having indication or alarm
Patent
1981-05-21
1983-10-11
Swann, III, Glen R.
Communications: electrical
Selective
Having indication or alarm
340765, G08G 100, G09G 318
Patent
active
044095830
ABSTRACT:
Radio system for video display of a map and symbols traced on the map: It comprises means for radio transmitting a plurality of digital messages, each including the address of a map among a plurality of maps, the definition of symbols among a plurality of symbols and the coordinates of the symbols on the map. At the receiving station, there is provided a display device having a plurality of points defined by coordinates and which can be selectively activated, a plurality of transparent views representing the maps and a selector for selecting a view of given address. The selected view is projected on to the display device. The message including a map address equal to the address of the selected view is also selected and display logic means activates the points of the display device in response to the definition and coordinates of the symbols contained in the selected message.
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patent: 3899662 (1975-08-01), Kreeger et al.
patent: 3988533 (1976-10-01), Mick et al.
patent: 4271410 (1981-06-01), Crawford
patent: 4370733 (1983-01-01), Gaudio
Dahan Pierre-Louis
Letuan Phac
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