Pushbutton switch
US5664667A · kind A · utility
48Cited by
1References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pushbutton switch is described which has a printed wiring board and a keypad arranged above the printed board, wherein the keypad has a non-working portion and a working portion made of translucent silicone rubber or thermoplastic elastomer in which the upper surfaces of the non-working portions only are covered with an opaque film, with an underside surface thereof covered by an insulating resin film so as to form an electrically conductive light-reflecting layer which is grounded to an earth portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.