Light-activated remote control unit
US4048596A · kind A · utility
1Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1975 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Apr 17, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A remote control unit for an electrical appliance includes a pair of photocells and one or more threshold devices connected to sense differential illumination of the photocells. The threshold devices, in turn, emit signals that initiate operation of a control device connected to the appliance. The threshold devices are preferably gaseous discharge lamps whose light outputs are sensed by radiation-response switching circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.