Remote data readout system for transmitting digital data over ex

Details Remote data readout system for transmitting digital data over ex Remote data readout system for transmitting digital data over ex

1975-06-13

1977-08-02

Habecker, Thomas B.

Communications: electrical

Systems

Selsyn type

340152T, 340310A, 325 66, H04M 1104

Patent

active

040400468

ABSTRACT:
A system for providing remote readout of a plurality of groups of data indicating devices including a control unit for each group of data indicating devices for receiving interrogate data signals transmitted over a communication line or RF signal link from an interrogate unit at a central location to the locations of the control units, and for transmitting the interrogate data to transponders associated with the indicating devices over existing electrical power lines to which the control unit and transponders are connected via existing electrical outlets. The transponders are responsive to the interrogate data to generate reply data representing the reading of an associated indicating device for transmission over the electrical power line to the control unit which effects the transmission of the reply data to the central location.

REFERENCES:
patent: 3656112 (1972-04-01), Paull
patent: 3689886 (1972-09-01), Durkee
patent: 3810096 (1974-05-01), Kabat
patent: 3818481 (1974-06-01), Dorfman

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