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CAB SIGNAL AND SPEED CONTROL FOR LOCOMOTIVES

  • US 3,601,605 A
  • Filed: 08/28/1969
  • Issued: 08/24/1971
  • Est. Priority Date: 08/28/1969
  • Status: Expired due to Term
First Claim
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1. In a railroad classification yard, including a humping track over which cars are moved for selective classification, a system for controlling the operation of the hump locomotive, comprising in combinations, a. signal transmitting means on the wayside for transmitting over a predetermined channel combinations of a plurality of tones as operating commands to said hump locomotive, b. a cab signal indication sElector means on said wayside operable, and normally connected, for controlling said signaltransmitting means to actuate the transmission of selected tone combinations designating desired cab signal indications, c. a locomotive speed selector means on said wayside connected to said signal-transmitting means at selected times to bypass said cab signal selector means and operable at said times for controlling said transmitting means to actuate the transmission of other selected tone combinations designating desired speed ranges for the remote control of said locomotive, d. automatic control selection means on said wayside operable at said selected times to a remote locomotive speed control condition and connected for transferring at said times the control connections of said transmitting means from said cab signal selector means to said speed selector means, e. a receiver means on said locomotive coupled for receiving and registering the tone combination transmitted by the signal transmitting means, f. speed control means on said locomotive connected for controlling the speed of that locomotive and selectively operable to a manual and a remote control condition, 1. said speed control means coupled to said receiver means and responsive to the received tone combination only when actuated into the remote control condition for controlling the locomotive speed in accordance with that combination, g. the operation of said speed selector means following a transfer of the control connections of said transmitting means to said speed selector means actuating the transmission of a distinct initial signal request for establishing a remote control condition of said speed control means, h. an acknowledging means on said locomotive connected to said receiver means and said speed control means and operable only when an initial signal has been registered for establishing the remote control condition of said speed control means, and i. cab signal apparatus on said locomotive connected to said receiver means and responsive to registered tone combinations in the absence of an established remote control condition for guiding a locomotive operator in controlling said locomotive.

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