Stylus for position responsive apparatus having electrographic application
US4695680A · kind A · utility
114Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jun 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A stylus for use with an electrographic system of a variety wherein a digitizer surface is excited. The stylus accomplishes capacitive coupling with the surface without distortion due to perpendicular orientation of its central axis with respect to the digitizer surface. Due to the employment of a carefully shielded signal transmission rod in conjunction with a conductive body wall, spurious noise developed through the body and hand of the user is avoided. A switching technique wherein the stylus is depressed into the digitizer surface is provided, preferably employing a Hall effect switching device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.