Data communication system

Details Data communication system Data communication system

1989-07-10

1991-09-17

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34032562, 340310R, 359152, H04Q 900, H04L 1116

Patent

active

050498762

ABSTRACT:
A dialogue system uses a three wire bus connecting a central station with a plurality of substations with two of the wires carrying an AC supply voltage and a third one of the wires carrying data by means of a closed loop of the AC carrying wires and the third wire. The central station uses a series connection of a data transmitter and a data receiver with the third data wire and each substation includes a data receiver in series with the data wire and a data transmitter between the data wire and both AC wires.

REFERENCES:
patent: 3794888 (1974-02-01), Hisano
patent: 4176401 (1979-11-01), Lonberget
patent: 4320388 (1982-03-01), McCarthy et al.
patent: 4499463 (1985-02-01), Jacquel
patent: 4709233 (1987-11-01), Duval

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