Electronic keyboard
US4818828A · kind A · utility
30Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jun 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2237/004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A full sized electronic keyboard with full travel keybuttons provides switches for controlling an electronic typewriter or for controlling other devices. The keyboard has a structure designed for reducing part count and switch component part size and for simplifying assembly to minimize manufacturing cost. The structure has integral one piece parts for accommodating several keybutton actions. The integral one piece parts include a main frame, a sheet steel spring, a rubber dome switch member, and a printed circuit switch panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.