Input apparatus for a data processing system
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United States of America Patent
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Nov 3, 1998
Grant Date -
N/A
app pub date -
Oct 23, 1996
filing date -
Oct 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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