Inductive-carrier communication systems

Details Inductive-carrier communication systems Inductive-carrier communication systems

1975-08-07

1977-02-01

Claffy, Kathleen H.

325 51, H04B 500

Patent

active

040063151

ABSTRACT:
An integrated multiple-function communication system for highway, railroads and other applications, the system comprising a wideband coaxial trunk cable with associated amplifier/repeaters for long-distance point-to-point transmission of a plurality of carrier signals combined with inductive-signaling means including frequency-converter/amplifiers each having an input physically coupled to the coaxial trunk cable and an output coupled to an inductive-signaling conductor, the latter disposed within the trunk-cable structure or electrically related thereto whereby a relatively-uniform electromagnetic field of a desired strength is established along a highway or other service zone for inductive-carrier communication with vehicles, roadside call boxes and other devices located in proximity to the cable which interconnects with a control or terminal point.

REFERENCES:
patent: 2405501 (1946-08-01), Halstead
patent: 2407417 (1946-09-01), Halstead
patent: 2611075 (1952-09-01), Marlowe
patent: 2980793 (1961-04-01), Daniel
patent: 3328510 (1967-06-01), White
patent: 3470474 (1969-09-01), Rohrer

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