Key operated printed circuit switch
US4707578A · kind A · utility
2Cited by
11References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2223/034
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key operated switch for keyboards having a layer type construction of key support carrying printed circuits arranged to facilitate fully automatic production of keyboards. Further, the simple formation of a leaf spring, a key guide and the key stem comprising the switch enables these parts also to be assembled by machine. The simple and hence inexpensive manufacture of a keyboard utilizing the key operated switches causes no loss of operating quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.