Keyboard with removable modular keys
US4602138A · kind A · utility
11Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1985 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | May 3, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A contact-type keyboard comprises a plurality of modular keys and a support panel (11) provided with openings (12) in which the keys are inserted. Each key is provided with a pair of resilient tongue portions (51, 52) which lock it to the panel (11) and which are deformable to permit the key to be easily removed from the panel (11). Each key further comprises a resilient system formed by a dome-shaped spring and a coil spring, which are interposed between a movable actuator and the subjacent conducting parts of an electrical circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.