Magnetic base
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United States of America Patent
Stats
-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Aug 9, 1979
filing date -
Dec 8, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic base adapted to be secured to a magnetic substance attractively, wherein a permanent magnet 20 having a small reversible permeability .mu. is employed as a rotary magnet housed in a magnetic block 18 and rotated for switching magnetic active surfaces 24 of the block from an unexcited state to an excited state, thereby effecting a light and smooth rotation.
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Cited Art Landscape
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