Data transmission system with improved fault

Communications: electrical – Continuously variable indicating – With meter reading

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Details

34082550, 370 8560, 370 8512, 455601, H04L 522

Patent

active

049739530

ABSTRACT:
A system of transmitting data and frame signals distinguishable from the data between a plurality of nodes linked in ring form. Each node comprising two transmitter circuits for simultaneously transmitting data and frame signals in opposite directions, respectively, two receiver circuits for receiving the data and the frame signals from opposite directions, respectively, a priority circuit for selecting the data first received from the two opposite directions, a frame circuit for detecting receipt of the frame signals and generating frame signals, and a control circuit for detecting data transmission faults and supervising data transmission of the system according to the location of the fault in the system, in response to the frame signals.

REFERENCES:
patent: 3652798 (1972-03-01), McNeilly et al.
patent: 4190821 (1980-02-01), Woodward
patent: 4416008 (1983-11-01), Takahashi et al.
patent: 4501021 (1985-02-01), Weiss
patent: 4538264 (1985-08-01), Bahr et al.
patent: 4553233 (1985-11-01), Debuysscher et al.
patent: 4572270 (1985-07-01), Sweeton
patent: 4587651 (1986-05-01), Nelson et al.
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patent: 4670873 (1987-06-01), Cour et al.
Japanese Utility Model Publication (Kokoku) No. 58-47111; Mori et al., Oct. 20, 1983.
Mori et al., "Autonomous Decentralized Loop Transmission System ADL and its Application," Local Area Network Symposium, pp. 107, 9/83.

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