Westinghouse Air Brake Company

Charles L Crawford

Winslow Kevin Duff

Vincent Ferri

Robert D Dimsa

Daniel J Wolf

David J Pcsolar

Michael J Joyce, Jr

Gary L Bailey

A method of changing between two operator stations in a cab of a locomotive for controlling the brakes of the locomotive and of a train of railway cars connected to the locomotive. The stations each have at least one brake handle and an associated selector switch, with each of the switches being electrically connected to a brake control computer. The method includes stopping the train if the train is in motion and placing the brake valve handles of the stations in a position to apply the brakes at full service. One of the operator stations is selected as an active station for braking the train while the other station is selected to be inactive. Signals are directed from the selector switches at the operator stations to the computer, the signals indicating which of the two stations is active and inactive. The computer is provided with the software that accepts a valid transition to the station selected by the operator as the active station.

Dual station air brake control

Method and apparatus for providing a filtered signal which indicates of a flow of fluid to a fluid pressure communication conduit, the flow being dependent upon the pressure of fluid in a chamber. The pressure in the chamber is controlled by one or more pressure adjusting valves. The invention provides for receiving into a data processing module one or more valve signals indicating open states of the pressure adjusting valve or valves, and also a flowrate signal from a flowrate sensor, which represents the real instantaneous flowrate, and it is this signal which needs to be filtered to remove transients. The invention provides for choosing between a first processing mode and a second processing mode for the flowrate signal. The first processing mode is used when the second processing mode is not in effect, and when neither of the valve signals indicates an open valve. The second processing mode is activated a valve signal indicates an open valve. The second processing mode, when activated, proceeds according to a predetermined procedure and then returns to the first processing mode after no valve signal indicates an open valve. The signal is processed by either the first processing mode or the second processing mode, depending on whether valve signals have been received, and provides the filtered signal as an output to equipment external to the data processing module.

Flow signal filter

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Baldwinsville, NY, United States of America

Charles L Crawford