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Wayside signaling system for railroad cab signals and speed control

  • US 4,046,342 A
  • Filed: 08/31/1976
  • Issued: 09/06/1977
  • Est. Priority Date: 08/31/1976
  • Status: Expired due to Term
First Claim
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1. A wayside signaling arrangement for a stretch of railroad track for controlling train carried cab signal apparatus on trains traversing the stretch in either direction, said stretch divided into a plurality of sections between station locations, comprising in combination,a. a plurality of wire loops laid between the rails of each section and positioned in a predetermined pattern to inductively couple with said train carried apparatus to transmit cab signal commands thereto,b. a cab signal command transmitter means at each junction location between adjoining sections selectively coupled to the wire loops in an adjoining approach section, in accordance with the established traffic direction, for transmitting cab signal commands selected in accordance with advance traffic conditions,c. a receiver means at each junction location, selectively coupled to the wire loops in an adjoining advance section in accordance with the established traffic direction and always to the section loops other than those to which the associated transmitter means is coupled, for receiving the cab signal command transmitted by the transmitter means at the next junction in advance,d. cab signal command selection means at each location coupled between the associated receiver and transmitter means and responsive to the cab signal commands received by said associated receiver means from the advance section loops for activating said associated transmitter means to transmit a cab signal command into the approach section loops in accordance with the advance traffic conditions represented by the received cab signal commands, ande. traffic direction register means at each junction location coupled to the loops in each adjoining section and responsive to the reception of a unique signal from one approach direction loop for registering the established traffic direction,f. said traffic direction register means responsive to the registration of a traffic direction for enabling the coupling of the associated transmitter and receiver means to the correct loop pattern in accordance with the traffic direction established.

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