Dome switch having contacts offering extended wear
US4319099A · kind A · utility
81Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1981 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Jan 22, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2207/016
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved dome switch is disclosed in which the configuration of the dome is modified to avoid premature wear of the circular contact. Specifically, the marginal portions of the dome is physical contact with the circular contact are provided with reverse curvature relative to the curvature of the remainder of the dome. The dome switch is incorporated in devices in which the switch is mechanically actuated, such as in a video game joy stick, or manually actuated, such as in the keyboard of a hand-held calculator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.