Switchable permanent magnet holding device
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United States of America Patent
Stats
-
May 11, 1982
Grant Date -
N/A
app pub date -
Jul 25, 1980
filing date -
Aug 12, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switchable permanent magnet holding device in which a permanent magnet rotatably disposed within a bore in a magnetic circuit block is rotated, so that the magnetism acting surfaces of the magnetic circuit block are brought into an exciting state for retaining a magnetic substance thereon and into a non-exciting state for releasing the magnetic substance therefrom. The permanent magnet is pressed against a stopper for impeding rotation thereof, due to a gyromagnetic force acting across the permanent magnet and the magnetic circuit block when the permanent magnet is rotated to a position in which the magnetism acting surfaces of the block become exciting.
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