Search position encoder
US5257024A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/851
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The search position encoder includes a generally planar medium, a search probe and a device for moving the probe generally parallel to the surface of the planar medium, and indexing device for locating the actual position of the probe relative to a fixed location on the generally planar medium. A plurality of gratings consisting of alternating strips of conducting and non-conducting materials are arranged on or adjacent to the medium parallel to orthogonal axes of the medium, and a device for sensing the movement of the probe in a plane parallel to the gratings. The location of the probe may then be determined based upon the sensing of the passage of the probe relative to the gratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.