Keyboard
US4264477A · kind A · utility
10Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1978 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Feb 21, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Keyboard having contactors and contacts which are selectively urged against one another by depression causing engagement of one by the other, the keyboard having at least contactors or contacts or both which are constructed of a conductive polymeric composition such that upon engagement of a contactor with a contact there is exhibited substantially reduced bounce after repeated closure of contactor against contact even at micro ampere current levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.