Boots – shoes – and leggings
Patent
1982-05-03
1984-11-13
Heckler, Thomas M.
Boots, shoes, and leggings
455606, G06F 100
Patent
active
044829809
ABSTRACT:
A communications system with a local network having two metallic cables providing redundant channels between stations of a group with redundant optical rings forming a highway interconnecting those networks. An optical-electrical interface connects the networks and the ring.
This interface includes an optical detector producing a corresponding electrical signal, an optical transmitter which repeats the detected message, and a control element connecting the output of the detector with the transmitter. A control signal supplied over one metallic line from the station which is transmitting to its interface causes the control element to disconnect the detector and transmitter to prevent operation of the combination as a repeater. The transmission is then supplied over another metallic line from the station to the transmitter and thence around the ring until it is converted to an electrical signal at the corresponding detector. The resulting electrical signal is then conducted to the transmitting station over still another metallic line for checking as a means for determining if the ring is complete.
REFERENCES:
patent: 4237550 (1980-12-01), Steensma
patent: 4357606 (1982-11-01), Fortescue
patent: 4399531 (1983-08-01), Grande et al.
patent: 4402903 (1983-09-01), Lenderking
Korowitz Simon
McMenamin Francis E.
General Signal Corporation
Heckler Thomas M.
Huberfeld Harold
MacKay Raymond F.
Miller, Jr. William G.
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