Enlarged switch area membrane switch and method
US4471177A · kind A · utility
21Cited by
34References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Aug 13, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2227/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A membrane switch (10) is the subject matter of this patent application. The switch (10) includes first and second switch networks connected in parallel to effect a particular function. Spacer bridges (50, 52) are interposed in the first and second switch networks to preclude inadvertent engagement of contacts on lamina surfaces (14, 16, 28, 30). The bridges (50) of the first network are either adjacent or spaced from all bridges (52) of the second network in order to insure that the application of pressure to one of two external laminae (22, 24) will activate at least one of the switch networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.