Portable card-like article
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United States of America Patent
Stats
-
Jan 24, 1989
Grant Date -
N/A
app pub date -
Dec 22, 1987
filing date -
Dec 23, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable card-like article having a force sensing assembly for use in a force monitoring system comprises a support (3) to which is pivoted a plate (1) via a pair of laterally spaced arms (2). A pair of leaf springs (4) urge the plate (1) towards a normal, rest position. A Hall effect transducer (8) and permanent magnet (7) are mounted to a base (5) of the assembly and an underside of the plate (1) respectively and sense pivotal movement on the plate (1) due to the action of a writing instrument of the upper surface of the plate. The output signals from the Hall effect transducer (8) provide an indication on the magnitude of the applied force.
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