Abstract: A railroad signaling system operative for controlling railroad traffic to control signals, said system comprising: a control point; a control block having a plurality of common nodes and a node which serves as a control point; and a common medium which is capable of transmitting the control signals and separate independent messages while precluding interference between said control signals and said independent messages.

Abstract: A railroad signaling system operative for controlling railroad traffic to control signals, said system comprising: a control point; a control block having a plurality of common nodes and a node which serves as a control point; and a common medium which is capable of transmitting the control signals and separate independent messages while precluding interference between said control signals and said independent messages.

Abstract: A system for controlling a train's approach on a right-of-way to a grade crossing such that a uniform warning time is ensured comprising: a communication based train control scheme including a computer situated on the train; a device for detecting the presence of the train at a first control point on the right-of-way and for determining the train's speed thereat; a device for activating the gate at the grade crossing responsive to the train being at a second control point on the right-of-way wherein the second control point is based on the determined speed such that a uniform warning time is provided.

Abstract: A contactless detection system for detecting the movements of the switch points of a railroad switch and stock rail of a railroad switch/point having a transformer for detecting or sensing the position of the switch points, the transformer having a core linked to the switch points, and further having a primary coil and a pair of secondary coils wound around the core; and an electronic interface means for receiving signals from the secondary coils responsive to, and corresponding with, the positioning of the switch points.

Abstract: A contactless detection system for detecting the movements of the switch points of a railroad switch and stock rail of a railroad switch/point having a transformer for detecting or sensing the position of the switch points, the transformer having a core linked to the switch points, and further having a primary coil and a pair of secondary coils wound around the core; and an electronic interface means for receiving signals from the secondary coils responsive to, and corresponding with, the positioning of the switch points.

Abstract: A system for controlling a train's approach on a right-of-way to a grade crossing such that a uniform warning time is ensured comprising: a communication based train control scheme including a computer situated on the train; means for detecting the presence of the train at a first control point on the right-of-way and for determining the train's speed thereat; means for activating the gate at the grade crossing responsive to the train being at a second control point on the right-of-way wherein the second control point is based on the determined speed such that a uniform warning time is provided.

Abstract: A vandal resistant light signal unit consisting of a modular integrated circuit arrangement having an insulative circuit board, which has a first broad area layer of conductive material on one side of the circuit board and a second broad area layer on an opposite side of the circuit board. The first layer defines a positive energy plane and the second a negative energy plane. Also, the unit has a plurality of independent series circuits connected in parallel to respective spaced points or nodes on the oppositely located layers of conductive material. Moreover, the broad area layers are connected to opposite sides of a power supply, and these layers constitute an arrangement for resisting vandalism occasioned by projectiles directed at said light signal unit.