Electromagnetic control device for sewing machine
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United States of America Patent
Stats
-
Mar 31, 1981
Grant Date -
N/A
app pub date -
May 7, 1979
filing date -
May 7, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a sewing machine having a signal generator for producing a desired stitch pattern signal and a stitch forming mechanism actuated by said signal for forming said desired pattern, a device for receiving said signal and controlling said mechanism comprising an electromagnetic driver having a rotor shaft and a stator, at least one pair of coils mounted on said stator for receiving said desired stitch pattern signal and generating corresponding magnetic fields, a plurality of magnets attached to the periphery of said rotor in alternating polarity for interacting with said generated magnetic fields to angularly position said rotor in accordance with said stitch pattern signal, and means coupling said rotor shaft to said stitch forming mechanism to form said selected stitch pattern.
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