Position indicator employing light guides
US4572948A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Jul 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05G2009/04759
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for indicating the position of a movable member, such as a manual control lever, which uses light signals. The apparatus includes at least three light guides and means for introducing distinctively different, cyclically varying light signals into at least two of the light guides. The degree of optical coupling between the third light guide and each of the other two light guides is controlled in accordance with the position of the movable member. An indication of the position of the member is then provided by detecting the third light signal and indicating the extent to which it exhibits the distinctive characteristics of the first and second light signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.