초록 ▼

Improvements in devices designed to actuate the air brakes of a freight car when a derailment occurs; a device which operates to immediately detect a wheel derailment of a railway train and automatically brings the air brake system of the train into a state of emergency stop; a fail open system and

Improvements in devices designed to actuate the air brakes of a freight car when a derailment occurs; a device which operates to immediately detect a wheel derailment of a railway train and automatically brings the air brake system of the train into a state of emergency stop; a fail open system and apparatus including an air relief valve attached to a railway car and also connected to the air brake pipe of the air brake system, sensor cylinder and spring assemblies connected to the railroad car body at one end thereof and at the other end to the side frame of a railroad car truck adjacent the railroad car wheels, an oil reservoir in the air relief valve which, when full, maintains the air relief valve closed and not venting air from the air brake pipe, a piston with an elongate piston rod associated with an oil reservoir in each sensor cylinder, the end of the piston rod being attached to the truck side frame, a line communicating between the oil reservoirs of the air relief valve and each sensor cylinder so that, when a wheel of the truck side frame derails and falls toward the roadbed, the piston rod in the sensor cylinder associated with that wheel draws oil from the air relief valve reservoir, thus opening the air relief valve to vent air from the air brake pipe and train line; a fall closed system and apparatus utilizing the same above listed elements in an opposite manner; a telemetry operated system utilizing air relief valves only on the last car of the train with radio signals transmitted from any derailed car actuating the rear car air relief valves.

대표청구항 ▼

A railroad train having a locomotive and at least two freight cars therewithin, one first said car forward and one second said car rearward in the train, each freight car having (a) a car body and car body supporting frame, (b) sets of pairs of wheels mounted on paired axles, (c) each axle carrying

A railroad train having a locomotive and at least two freight cars therewithin, one first said car forward and one second said car rearward in the train, each freight car having (a) a car body and car body supporting frame, (b) sets of pairs of wheels mounted on paired axles, (c) each axle carrying two wheels near the respective ends thereof, (d) truck side frames connecting pairs of said axles on opposite ends thereof, (e) opposed ones of said side frames mounting bolsters therebetween, (f) said bolsters carrying said car frame and body and (g) an air brake running the length of each said car, said first, forward freight car having: (1) a first, normally full hydraulic chamber received in a first assembly connected at one upper end thereof to one of said car body and said car frame, (2) a separate, second, normally empty hydraulic chamber in a second assembly also connected at one upper end thereof to one of said car frame and car body, (3) a normally full hydraulic fluid line extending between said first and second hydraulic chambers with a one way valve thereon so that fluid forced from said first chamber will go into said line and second chamber and not return into said first chamber (4) a piston in said first hydraulic chamber having a piston rod connected at its free end to one end of one of said truck side frames, said piston normally located at a chamber full position in said first hydraulic chamber, (5) means associated with said second hydraulic chamber, including a radio frequency transmitter, operative to transmit a radio signal when hydraulic fluid is driven into said second, normally empty, hydraulic chamber, (6) said latter means including a spring loaded piston in said second chamber normally biased to the chamber empty position but operative to be driven to a chamber full position when hydraulic fluid is forced into said second chamber from said line, and (7) the piston and piston rod of the first hydraulic chamber operating to drive hydraulic fluid from said first hydraulic chamber into said line and second hydraulic chamber when the wheel at the end of the truck side frame to which said rod is attached derails.