Actuator for keyboard switches
US4341934A · kind A · utility
9Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Nov 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2235/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A resilient metallic actuator and contact, for use with keyboard switches, designed to provide a specific tactile effect to the keyboard operator. The preferred actuator is a double member actuator. The first member provides a resting spring bias to the key. The second member provides a significant increase in the spring bias force slightly prior to the switch making contact. In one embodiment the actuator activates a dome like over center contact to close the switch. In an alternate embodiment the second actuator member is configured to perform the function of a contact member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.