Harmon Industries, Inc.

Samuel R Mollet

David J Wade

An apparatus and method are provided for interfacing railway controllers with light units, such as LED light unit arrays, to shunt and/or disable test signals not traditionally intended to test non-incandescent light unit arrays.

Signal interface module

Apparatus for sensing coded cab current information in a high level noise environment, caused by the magnetic fields of AC traction motors employed in the locomotive, utilizes pickup coils each having an upright axis and an axially extending, ferrite core. The coils are employed in pairs on a common magnetic structure located over an underlying rail, the coils being spaced apart horizontally and transversely of the rail. Magnetic flux resulting from the cab current is directed in opposite axial directions through the coils, whereas magnetic flux produced by the AC traction motors is directed through the coils in the same axial directions. This results in the addition of the voltages induced in the coils by the cab current, and voltage subtraction in response to the interfering magnetic field produced by the AC motors.

Growing community of inventors

Blue Springs, MO, United States of America

Samuel R Mollet