Keyboard of membrane switches with tactile feedback
US4263485A · kind A · utility
24Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Oct 15, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H13/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keyboard type switch is disclosed wherein a domed snap disc performs triatic functions of acting as a tactile feedback source for switch operation, of supplying a conductive path for electrical energy when depressed, and of providing a contact surface for manual operation. The disclosed switch is covered by a multilayered nonconductive membrane and spacer to provide maximum safety from electrical shock to the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.