Keyboard switch assembly with improved pushbutton and associated double snap acting actuator/contactor structure
US3978297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2237/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keyboard device which includes a frame having a plurality of bores in which there is positioned a core for slideable motion therein, and a keyboard top positioned over the bores and preferably sealing each of the cores within the bores of the frame so that no particles of food or dust can accumulate between the cores and the frame while still permitting the cores to be depressed to cause a contactor means to engage contact means. In the preferred embodiment the cores are loose within the bores and are held therein from the top by said keyboard top. In addition, a mask to simulate the appearance of a frame about the portions of the top is provided. In addition, the preferred embodiment is sealed on the top and bottom to protect the in words from the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.