Electrostatic discharge proof keypad
US4809126A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Aug 5, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keypad which prevents electrostatic discharge from occurring in electronic equipment such as printers, computers and the like. The keypad includes a switch mechanism positioned on the circuit board associated with the electronic equipment. Attached to the switch mechanism is an actuating lengthening member of sufficient length to isolate the switch mechanism from electrostatic discharge through the keypad. A light source is also positioned under the keypad and the light source has attached thereto a light conducting lengthening member of sufficient length to isolate the light source from electrostatic discharge through the keypad. A method of preventing electrostatic discharge through a keypad to a circuit board is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.