Illuminated membrane switch
US4493958A · kind A · utility
16Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Sep 28, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2231/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illuminated membrane switch assembly lighted by a contained rearwardly positioned bulb unit. A membrane switch is actuated by a small reciprocable transparent plunger with an illuminated graphics bearing overlay on its forward surface. Light is transmitted axially from the rear of the switch around the periphery of conductive areas on the membranes to the transparent plunger without any shadowing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.