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Hot box detector system

  • US 3,994,458 A
  • Filed: 01/23/1975
  • Issued: 11/30/1976
  • Est. Priority Date: 01/23/1975
  • Status: Expired due to Term
First Claim
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1. In combination with a railroad track section having a railway train thereon including distant interconnected engine and caboose components, at least one normally deactuated and heat actuatable signal generating means mounted on a wheeled component of said train intermediate said engine and caboose in heat transfer relation with a wheel bearing means of said intermediate wheeled component, a trackside signal receiver capable of receiving a signal generated by said signal generating means as the latter passes in close proximity to said trackside signal receiver, a trackside radio signal transmitter operatively associated with said receiver to transmit a predetermined low magnitude radio signal in response to said receiver receiving a signal from said signal generator, a radio signal receiver mounted in each of said engine and caboose components for receiving said low magnitude radio signal, and trainmen warning signal generating means operatively associated with each of said radio signal receivers for rendering a warning signal in response to the corresponding radio signal receiver receiving said predetermined radio signal from said trackside transmitter, said wheeled component including an axle assembly having opposite end wheels mounted thereon, the opposite end portions of said axle assembly being journalled from said wheel bearing means, said signal generating means being mounted on one end portion of said axle assembly for rotation therewith.

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