Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1995-11-07
1996-12-03
Geckil, Mehmet B.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
34082505, 370276, H01J 1300
Patent
active
055817106
ABSTRACT:
A ring network of workstations interconnected on a single simplex ring is converted to duplex communications on the single ring by placing two transceivers in each workstation and adding a duplex conversion device between each workstation and its ring terminal box. One of the transceivers receives and retransmits signals in a clockwise direction around the ring; the other transceiver receives and retransmits signals in a counter-clockwise direction around the ring. The clockwise and counter-clockwise signals are superimposed on the ring but are isolated at the workstations by the duplex conversion device.
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Noel, Jr. Francis E.
Schultz Kenneth D.
Stammely Thomas E.
Cockburn Joscelyn G.
Geckil Mehmet B.
International Business Machines - Corporation
Knearl Homer L.
Sirr Francis A.
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