Abstract: This invention, is a PROCESS, for creating a flashing red light at a railroad-highway grade crossing.This PROCESS is accomplished by the use of two units. The first unit houses a light that is capable of casting a very intense beam out ahead of the train. It also houses a means to oscillate this light from side to side (left and right) using a motor mechanism, like a heavy duty windshield wiper motor.The second unit is a round, red reflector that is capable of reflecting the light in both directions down the roadway that intersects the railway. This PROCESS is accomplished as the oscillating light beam strikes the red reflector for just a split second with each pass, creating the appearance of a flashing red light, which causes motorists, and others, to know that a train is approaching the grade crossing.The reflector is shaded from the sunlight, leaving it in relative darkness. This enable motorists to see the reflection (the flashing red light) even during daylight hours.

Abstract: A third rail warning device in which the third rail carries in use a dangerously high voltage. Connected to the third rail is a source of relatively safe voltage as a warning that the dangerously high voltage is about to be applied to the third rail. A time delay is employed to terminate the safe voltage and permit automatic connection of the dangerously high voltage, and an alarm is actuated when the safe voltage is being applied to the third rail.

Abstract: A system and method for indicating the speed of a locomotive during low speed continuous loading and or unloading of bulk materials such as coal. The system utilizes treadle switches which are equally spaced along a track, the treadle switches generating positional information which is transmitted to a receiver in the locomotive thereby enabling a very accurate indication of the speed of the vehicle to be displayed to the driver.

Abstract: The invention relates to a safety device for selectively track-guided or road-travelling vehicles, which safety device exhibits on the road side an optical indicator device switched by a control device and normally set to "stop" signalling. In order to permit a change of the vehicle from track-guided to non-track-guided operation only when the sensing rollers are fully retracted, the invention provides that both a monitoring device monitoring the assumed rest position of the sensing rollers and signal transmission device coupled therewith are provided on the vehicle side. The signal transmission device transmits a signal indirectly switching the optical indicator device temporarily to "go" only in the case of the sensing rollers occupying the rest position.

Abstract: An audio frequency (AF) track circuit whereby a railway track tuned loop transmitter operating in a dual resonant mode, for handling, two signal frequencies, can be coupled to the rails. Each frequency is conducted through a tuning unit having series and parallel branches tuned to each frequency. The track circuit using the tuned loop transmitter eliminates DC return current imbalance effects while maintaining suitably high track circuit shunting sensitivity.

Abstract: A railway signalling system includes a plurality of trackside equipments (11,12) and means (1,2,3,4,6, 15,16) for transmitting control information to the equipments and receiving status information therefrom, each of the trackside equipments being provided with a respective microprocessor (13 or 14) via which such control information is transmitted from the said means to the equipment and via which such status information is received by said means from the equipment.

Abstract: A railroad track mounting arrangement for mounting a detecting device in proximate relation to a rail head portion of a section of rail includes first and second V-shaped rail clamp member which exhibit inner contours substantially equivalent to the outer contour of the rail base such that a tight fit is achieved therebetween. A side mounting portion extends from the rail clamp members at a point where, upon installation of the rail clamps, the side mounting portions are in close proximity to the rail base. A mounting bracket secures to the side mounting portion and has a base portion for holding in a secure manner the detecting device. A nut and bolt arrangement secures the rail clamps together and, in the event of overtightening, fractures, thereby insuring positive detection of a faulty installation.

Abstract: This invention consists of a light reflecting sign for attachment to railway cars for the prevention of accidents when such cars are stalled or parked across minor, poorly lit country roads. It is in the shape of a horizontal "X" resembling a "railway crossing" sign the face of which is lined primarily with red flat plastic light-reflecting strips which are tipped at the ends of the sign with small yellow angular surface reflectors.