Optical rotary encoder having superposed metal plate and shield plate
US4780610A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/3473
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A manually-operated optical rotary encoder is provided with light receiving and emitting elements, the optical encoder generating a plurality of pulse signals. The rotary encoder comprises a reflecting plate and a non-reflecting plate which are superposed. The rotary encoder comprises a first code plate and a second code plate, which are alternately and continuously formed with light reflecting portions and non-reflecting portions. The rotary encoder further comprises a roller engageable with concavo-convex portion provided in the outer peripheral edge of the first code plate, a shaft for the roller and a supporting member for rotatably supporting the roller so that the latter may come into contact with the concavo-convex portions. The roller, the shaft and the supporting member are formed of synthetic resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.