Control device
US4573110A · kind A · utility
2Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R12/7076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reflective screen with a gradient of reflectivity is moved by a control handle outside a cabinet to display different parts of the screen through a window to a LED and a phototransistor. The changing of the light reflected by the screen from the LED to the phototransistor is used to control an electrical parameter, providing a low cost control device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.