Sealed, modular keyboard providing a tactile feel
US4471189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Aug 31, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The keyboard comprises a printed circuit (4) serving both as an electrical connection means and as a supporting means for a modular frame (3) including a plurality of square-shaped housings (30) defined by walls (31) and arranged in rows and columns, either contact modules (7) or signal-lamp modules fitted on said printed circuit in said housings, a resilient, sealed diaphragm (1) secured to said frame, keys cooperating with said contact modules through the portions of said keys which face outwardly from said diaphragm and are actuated by an operator finger, and means (105, FIG. 5; 9, FIG. 2) by which a tactile feel can be provided through a snapping, movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.