Conveying data signals between relatively rotatable units
US4201979A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1978 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Jul 24, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C19/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
When high-speed digital signals are transmitted through a slip ring connection between relatively rotatable systems, the slip ring connection is prone to brief interruptions of contact which introduce extra "ones" or "zeros" into the transmitted digital wave form. In this invention, the binary input signal is split into two paths, one-representing signals causing a current to pass through a first slip ring and zero-representing signals causing a current to pass through a second slip ring. On the output side of the slip rings, the passage of current through one slip ring or the other is used to reproduce the original binary signal; additionally, the combined current flow through both slip rings is used to generate an extra signal which, in the absence of current in either slip ring, indicates a fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.