Linear magnetic actuator
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United States of America Patent
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-
Feb 17, 1998
Grant Date -
N/A
app pub date -
Jan 16, 1996
filing date -
May 18, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A linear magnetic actuator has a pair of stator windings (14, 15) of opposite polarity formed inside a cylindrical soft iron shell (16) providing a slotless back iron piece. The axially movable shuffle comprises a soft iron shaft (11) with a pair of radially magnetised annular permanent magnets (12 and 13). The arrangement has cylindrical symmetry and the stator windings are as thin as possible to minimise the air gap between the cylindrical pole faces of the annular magnets and the back iron.
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