Keyboard switch assembly having flexible contact layer with snap initiator dome
US4096364A · kind A · utility
23Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Feb 22, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/032
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Keyboards having flexible plastic domes which snap when depressed to provide tactile feel, at least some of said domes formed from a sheet of plastic and having a bar shaped concave snap initiator formed in said dome, and an actuator comprising at least one cross bar for engaging the snap initiator to initiate dome depression in situations in which the actuator used to depress the dome does not effectively produce snapping of the conventional dome because of the shape of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.