US 4,420,133 AGranted

Device for the transmission of information through the rails between a railway track and a group of vehicles running along this track

AssigneeJeumont-Schneider Corporation

InventorMichel J. Dietrich

Life of this patent

Estimating the term…

Loading patent…

Abstract

A system for transmitting data long rails of a railway track for reception by a receiver mounted on a vehicle of the train. The system includes resonance circuits defining contiguous zones which are independent of a block system of the railway track. An insulative conductive loop is placed between the rails of the track and proximate the resonance circuits. An AC generator and modulation are provided to produce a modulated carrier frequency corresponding to the data to be transmitted and is coupled to the conductive loop. The receiver is positioned at the front of the train when the conductive loop is positioned near the downstream side of each zone and toward the rear of the train when the conductive loop is positioned toward the upstream side of each zone relative to the direction of train travel.

Claims12

Dependent claims

A system for transmission of data along the rails of a railway track through a plurality of successive, contiguous zones, said data transmitted to a train passing along said track in a given direction of travel, said system comprising:

(1) a plurality of resonance circuits, each connected across the rails of said zone, pairs of said resonance circuits defining said zones therebetween, and said zones being independent of a block system of said railway track,
(2) an alternating current generator for each zone having a predetermined frequency outside frequency bands of said block system, said predetermined frequency producing a carrier frequency for the data to be transmitted.
(3) for each given zone, said pairs of said resonance circuits defining the given zone tuned to the carrier frequency of said generator within said given zone,
(4) means for modulating said carrier frequency for each zone corresponding to the data to be transmitted thereby providing a data signal for each zone,
(5) a plurality of insulated conductive windings in the form of conductive loops, one of said windings within each zone and positioned between the rails of said tracks adjacent the downstream side of each zone with respect to the direction of train travel, for each given zone said one winding positioned immediately proximate one of said pairs of resonance circuits of said given zone and remote from the other of said pair of resonance circuits of said given zone,
(6) means for coupling the winding within each zone to receive the data signal from the modulating means of each zone, and
(7) a receiver mounted onboard said train at a position near the forward end of said train along the direction of travel of said train, said receiver tuned to the respective carrier frequencies of each zone for receiving the data signals of each zone.

4 more elements

A system for the transmission of data along the rails of a railway track through a plurality of successive, contiguous zones, said data transmitted to a train passing along said track in a given direction of travel, said system comprising:

(1) a plurality of resonance circuits, each connected across the rails of said track, pairs of said resonance circuits defining said zones therebetween, and said zones being independent of a block system of said railway track,
(2) an alternating current generator for each zone having a predetermined frequency outside frequency bands of said block system, said predetermined frequency producing a carrier frequency for the data to be transmitted,
(3) for each given zone, said pairs of said resonance circuits defining the given zone tuned to the carrier frequency of said generator within said given zone,
(4) means for modulating said carrier frequency for each zone corresponding to the data to be transmitted, thereby providing data signals for each zone,
(5) a plurality of insulated conductive windings in the form of conductive loops, one of said windings within each zone and positioned between the rails of the tracks adjacent the upstream side of each zone with respect to the direction of train travel, for each given zone said one winding positioned immediately proximate one of said pairs of resonance circuits of said given zone and remote from the other of said pair of resonance circuits of said given zone,
(6) means for coupling the winding within each zone to receive the data signals from the modulating means for each zone, and
(7) a receiver mounted onboard said train at a position near the rearward end of said train along the direction of travel of said train, said receiver tuned to the respective carrier frequencies of each zone for receiving said data signals of each zone.

4 more elements

A system for the transmission of data along the rails of a railway track through a zone thereof, said data transmitted to a train passing along said track in a given direction of travel, said system comprising:

(1) two resonance circuits, each connected across the rails of said track, said resonance circuits defining said zone and said zone being independent of a block system of said railway track, one resonance circuit connected at the downstream end of said zone relative to the direction of train travel, and the other resonance circuit connected at the upstream end of said zone,
(2) an alternating current generator for said zone having a predetermined frequency outside frequency bands of said block system, said predetermined frequency producing a carrier for the data to be transmitted,
(3) each of said resonance circuits tuned to the carrier frequency of said generator,
(4) means for modulating said carrier frequency for said zone corresponding to the data to be transmitted, thereby providing data signals for said zone,
(5) an insulated conductive winding in the form of a conductive loop, said winding within said zone and positioned between the rails of said tracks acjacent the downstream side of said zone with respect to the direction of train travel, said winding positioned immediately proximate said downstream resonance circuit and remote from said upstream resonance circuit,
(6) means for coupling the winding within said zone to receive the data signals from the modulating means of said zone, and
(7) a receiver mounted onboard said train at a position near the forward end of said train along the direction of travel of said train, said receiver tuned to the carrier frequency of said zone for receiving said data signals of said zone.

4 more elements

Dependencies are inferred from the claim text.