Finger operated switching device
US4054944A · kind A · utility
42Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Jan 28, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A finger operated switching device includes a key assemblage having a key and a key magnet which moves relative to a biasing magnet wherein the magnets are so dimensioned and mutually positioned so that the key assemblage is biased to a retracted position and when the key assemblage is pushed to an extended position the force required first increases to a peak and then rapidly decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.