초록 ▼

A normally inactive sound signal generator is supported from the rotatable axle of each railway car in a train and actuatable to generate a predetermined signal in response to a hot box condition. Electrically operable signal receivers coupled to electrically operable radio signal transmitters are s

A normally inactive sound signal generator is supported from the rotatable axle of each railway car in a train and actuatable to generate a predetermined signal in response to a hot box condition. Electrically operable signal receivers coupled to electrically operable radio signal transmitters are spaced along the railroad track at predetermined intervals which may be 4,000 to 6,000 feet apart and the receivers and transmitters are operable on low magnitude current, such as provided in the rails of the track for Centralized Train Control Systems. The engine and caboose of a freight train are provided with radio signal receivers actuated by on-board current and the caboose receiver is operative to actuate visual and audible signals as well as an electrically operated air brake dump valve (through a time delay mechanism) and the engine receiver is operable to also actuate visual and audible signals and a relay (through a time delay mechanism) electrically connected to the engine electrical control system for automatically reducing the power output of the engine. If the hot box condition detected is too distant from the actuated track side radio signal generator to receive its low magnitude radio signal, then the low magnitude signal is received by the caboose mounted radio signal receiver as it passes close by the actuated trackside radio transmitter.

대표청구항 ▼

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 i

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.