Input apparatus for a data processing system
US5831553A · kind A · utility
107Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Oct 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03543
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Input apparatus for a data processing system. An input apparatus, for example a mouse or a track ball, comprises a member which is rotatable by manipulation by a user. The rotation causes a change of a magnetic field, which change is detected by a detector. The member in the apparatus in accordance with the invention comprises a non-homogeneous distribution of a soft-magnetic material which, upon rotation, changes a magnetic field externally applied to the member by a magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.