Abstract: The disclosure following relates generally to complex simulations, and fault diagnosis. In some embodiments, a component that is causing a delayed simulation time of a system is determined. A component of reduced complexity is designed, and the component of reduced complexity is used to replace the original component in the system. Fault diagnosis may then be conducted using the updated system with the reduced complexity component, thus decreasing the time taken to diagnose the fault.

Abstract: A transmission line 5 configured to be broken when it comes into contact with a rail 4 is installed on a disengagement prevention guide 1 attached to an axle box 3 of a railway vehicle. One end 5a and the other end 5b of the transmission line 5 are connected to a determination unit 6 to monitor continuity of the transmission line 5. In the event of a derailment, the determination unit 6 determines that a derailment has occurred when the disengagement prevention guide 1 makes contact with the rail 4 and the transmission line 5 breaks, thereby interrupting the continuity of the transmission line 5. This arrangement allows an accurate detection of a derailment, so as to prevent a railway vehicle from traveling when its wheels have become disengaged from a rail without an operator being aware of it, thus improving safety after the derailment occurs.

Abstract: An anti-derailment safety device is in a shape of an inverted letter L and includes a transverse portion and a longitudinal portion perpendicular to the transverse portion at a side below the transverse portion; two sides of the transverse portion in a width direction of the transverse portion are each provided with an installation seat formed by a wing plate extending outwardly, and bolt holes are provided on the installation seat; and an inner side surface of the longitudinal portion is a stopping surface.

Abstract: A derailment detector for a railway vehicle includes a housing in selective fluid communication with a brake pipe of the railway vehicle to receive compressed air from a pneumatic braking system. A main chamber is disposed within the housing and pressurized by the compressed air. A shock detection assembly is adapted for detecting an acceleration indicative of a derailment condition and activating a main valve disposed within the main chamber upon detection of the acceleration indicative of the derailment condition. A discharge valve is in selective fluid communication with the main chamber, where, upon detection of the acceleration indicative of the derailment condition, the discharge valve is operative for discharging a predetermined amount of the compressed air from the main chamber to indicate that the derailment condition has occurred.

Abstract: A safety brake for braking a moving member includes at least one active member co-operating by friction with a passive member. The active member is kept at a distance from the passive member by an incompressible fluid which opposes the effect of a drive element (7) that is coupled to the active member and tends to urge the active member against the passive member. The incompressible fluid is enclosed in a circuit (6) which possesses a frangible portion (8) such that when the frangible portion is broken in order to activate the safety brake, it constitutes an exhaust opening to allow the incompressible fluid to escape from the circuit (6).

Abstract: An emergency braking device for railway cars having a wheel truck provided with a fluid pressurized brake line in a wheel braking system, comprises an elongated tubular break-away valve member rigidly attached to one of the truck and car frame, and is connected in the pressurized brake line. A flexible substantially inextensible cable is connected between the valve member and the other of the truck and car frame. The cable is connected between points which are on a line substantially normal to the valve member. The cable length is such as to permit normal movement between the car frame and the truck without being tensioned but is tensioned during abnormal movement therebetween corresponding to an emergency condition, at which time the valve member is caused to rupture providing an escape path for the pressurized brake fluid to automatically brake the railway car.

Abstract: A method and structure for automatically stopping a train riding on a railroad track should at least one wheel of the train go off of the track. The train has a conventional pneumatic brake line, with which a cutting arrangement is operatively associated for actuation should one wheel of the train go off the track, the severing of the pneumatic brake line allowing release of air so as to gradually apply the brakes and ultimately stop the train.

Abstract: A system for sensing derailment of a remotely controlled engine including a switch integrated with a dead man control circuit for the engine to automatically stop the engine upon activation of the switch. The switch further includes a deformable copper pipe having a brass rod within the pipe but electrically insulated therefrom. The copper pipe with the brass rod, each having a terminal electrically connected to the circuit, is placed between rails in a rail yard. When the engine derails the wheels of the engine or some other part of the train press the copper pipe in communication with the brass rod thereby activating the switch and shutting down the engine.

Abstract: Apparatus is disclosed which detects a wheel derailment, detached brake rigging or off center truck of a railway train and automatically switches the air brake system of the train into a state of emergency stop. A pair of synthetic resin tubes with closed lower ends are mounted to a brake bar of each truck and extend outwardly and downwardly toward the track. The tubes are mounted on laterally opposite, interior sides of the wheels. They are connected by flexible air hoses to a manually actuable valve which in turn connects to the main air brake pipe extending longitudinally along the underside of the railway car. The closed ends of the tubes are inwardly and upwardly offset from the rail and positioned for striking the rail or roadbed, rupturing one or more of the tubes and venting the air from the brake line upon the occurrence of one of the above hazardous failures.

Abstract: A safety device for initiating an air brake application attached to or integral with the side frame of a railway car truck in proximity to the rail consisting of a hollow shoe or casting communicating with the air brake train line and adapted to make contact with the rail and fracture upon derailment venting the train line air to the atmosphere.