Membrane switch apparatus having sequential bridging contact arrangement
US3987259A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Jun 12, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2231/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Membrane switch apparatus is disclosed, in its preferred form, as a keyboard including an insulator with an array of individual switching units located thereon. Each individual switching unit includes a plurality of first electrode members and a plurality of second electrode members. A flexible, nonconductive member is disposed in a spaced relation above and adjacent to the level of the top surfaces of the electrode members of the array of individual switching units. The flexible member includes conductive material located thereon in a patterned arrangement to allow sequential bridging first, of the plurality of the first electrode members and, second, of the plurality of second electrode members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.