Cab signal pickup system with motor noise reduction
US5628478A · kind A · utility
12Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Jan 31, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L3/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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: USPTO / EPO open patent data. Objective bibliographic and citation counts.