Abstract: A communication device includes a first resistance connected between a first reference potential and a midway point of one of a pair communication lines connected to a coil, a second resistance and a third resistance arranged in series so as to be connected between a second reference potential different from the first reference potential and a midway point of the other one of the pair communication lines, and a switch configured to open or close a path between the first resistance and the first reference potential.

Abstract: A vehicle auxiliary power supply that is mounted on a railway vehicle, includes a three-phase inverter circuit that converts DC power or AC power input from an overhead line to desired AC power to supply the AC power to a load, and is connected in parallel with a VVVF inverter device that drives a propulsion motor, wherein a blocking diode that prevents backflow from a side of the three-phase inverter circuit to a side of the overhead line is provided between the overhead line and the three-phase inverter circuit, and a SiC Schottky barrier diode is applied to the blocking diode.

Abstract: The adjustable crossover includes first and second cross-members, each having a central disc with two opposed arms extending radially therefrom. Each disc has a series of radial teeth on one side thereof, with the radial teeth of the two discs engaging one another to lock the arms of the two discs at an angle to one another when the two discs are locked together. The distal ends of the arms include electric line connectors to facilitate attachment of electrical power lines or cables.

Abstract: A moveable catenary system for carrying a container using an electric container freight train includes: a main rail track disposed beside a freight platform; a plurality of catenary masts disposed beside the main rail track; fixed support units fixedly coupled in a cantilever shape to the catenary masts, respectively, with the exception of the catenary masts corresponding to the freight platform; vertical driving support units coupled in the cantilever shape to the catenary masts corresponding to the freight platform so as to vertically rotate the catenary masts, respectively; a fixed catenary coupled to the fixed support units such that positions at which the vertical driving support units are disposed are cut and the vertical driving support units are disposed inside and along the main rail track; a moveable catenary connected to the vertical driving support unit, the movable catenary being circularly moved in a vertical direction according to the vertical rotation of the vertical driving support units; and

Abstract: A signal processing unit for a controller of a trolley pole switch is disclosed. The trolley pole switch switches the path of travel that an energy collector takes through the switch at a junction of catenaries at which a turn catenary and a straight catenary diverge from the straight catenary. The signal processing unit includes an input stage, a detection stage, turn and straight signal demodulation stages and an output stage. The input stage conditions modulated signals, each of which indicating a request to switch the path of travel through the trolley pole switch to the desired catenary diverging therefrom. The detection stage generates a validation signal if the conditioned modulated signal falls within a predetermined band. If the turn demodulation stage receives a conditioned modulated turn signal from the input stage and the validation signal from the detection stage simultaneously, it generates a low logic signal.

Abstract: An electronic controller for controlling a trolley pole switch is disclosed. The trolley pole switch switches the path of travel that an energy collector of a trolley pole takes through the trolley pole switch at a junction of power conduits diverging from the trolley pole switch. The electronic trolley pole switch controller includes a signal processing device and a power controlling device employed in tandem to control the frog solenoids of a trolley pole switch. The signal processing device detects and processes a plurality of modulated signals. Each modulated signal represents a request to switch the path of travel that the energy collector takes through the trolley pole switch to a desired one of the power conduits diverging therefrom.

Abstract: A power controlling unit for use with a radio board of a trolley pole switch controller is disclosed. The trolley pole switch has at least one frog for switching the path of travel that an energy collector takes through a junction of catenaries. The power controlling unit includes three reduction stages, a chopper control stage, and two output stages. A first reduction stage reduces power received from one catenary to an initial power level. The chopper control stage outputs two pairs of alternating signals. Controlled by a first pair of alternating signals, a second reduction stage reduces the initial power level to a secondary power level to operate the radio board. As long as it receives the initial power level, the third reduction stage reduces the secondary power level to a primary power level to operate the power controlling unit.

Abstract: A constant current wire crossing apparatus for overhead electrically operated vehicles, wherein wires of opposite polarity are connected by insulators to a crossing unit, including a conducting strip disposed on each insulator and appropriate switching circuitry such that a continuous source of power of correct polarity is available to a passing vehicle in any direction.

Abstract: A trolley-type power supply means and a turntable switch for moving apparatuses such as mining equipment. The switch is provided with two coupling portions installed in parallel with each other and reversely symmetrical with respect to a turning axis. By using coupling portions, a trolley can be turned in a desired direction or shunted from the trolley track to allow another trolley to pass by.

Abstract: A track crossing for a carriage of a two track suspension railroad arranged in a box girder has, on both sides of a slot provided in the lower flange of the box girder, running surfaces for support wheels, and at the sidewalls of the box girder, current rails and parallel guide surfaces for lateral guide rollers. For bridging and unused track two slewable support members with lateral guide surfaces and, optionally, running surfaces for the support wheels are provided. Current rails are arranged on at least one of the support members. The support members can be swung into depressions of the fixed sidewalls of the box girder of the one or the other track.