Diaphragm keyboard
US4771143A · kind A · utility
8Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Apr 16, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The diaphragm keyboard comprises a baseboard from the bottom of which pins (11) project in vertical direction. These pins (11) pass through apertures (22) in an encoding plate (20) and extend beyond the surface thereof, thus presenting spacers for a diaphragm (30). In addition, they serve for retaining and aligning the encoding plate (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.