Cab signal pickup system with motor noise reduction

Year	Description
1995	Invention patented by Lee A. McConnel and John H. Johnson on January 30th, 1995. Abstract: Inductive pickups for sensing coded cab current information employ short ferrite cores and exhibit a pronounced roll-off characteristic to provide a detection system that may be used with locomotives powered by alternating current traction motors. Desired response is enhanced by connecting the inductors in phase in a tuned circuit and by employing a cancelling coil in phase opposition that receives interfering motor noise but is insensitive to the coded information.
Source: selected by the editor from original sources.

Invention: Cab signal pickup system with motor noise reduction