Device of balancing lever in a multiplicative key
US6020566A · kind A · utility
11Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1999 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Aug 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device of balancing lever in a multiplicative key used in a keyboard comprises a cap, a base with a pair of guiding elements, a bridge support, and a balancing lever. Each gliding element has a hole, both ends of the balancing lever are symmetrically bent upward at a suitable angle. The two ends of the balancing lever pass through the holes on the pair of guiding elements and are supported therein at fixed positions such that the cap is kept in a stable orientation when pressed on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.