Electromagnetic needle selector for circular knitting machines
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United States of America Patent
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-
Nov 27, 1990
Grant Date -
N/A
app pub date -
Sep 1, 1988
filing date -
Oct 7, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An upstanding knitting cylinder carries a multiplicity of needle jacks on its circumference. In order to selectively move the needle jacks up and down on the knitting cylinder during the rotation thereof, a vertical row of selector fingers capable of engagement with butts on the needle jacks are rigidly mounted to respective sleeves which in turn are rotatably mounted on fixed horizontal shafts disposed in parallel spaced relation to one another in a vertical plane. Disposed opposite the respective sleeves on the fixed shafts are several pairs of electromagnet assemblies which are arranged in two diagonal rows in order to reduce the vertical dimension of the needle selector. An armature secured to each sleeve is held opposite each pair of electromagnet assemblies so as to be alternately attracted thereby, with the consequent bidirectional rotation of the sleeves and, therefore, the pivotal motion of the selector fingers to engage and disengage the needle jack butts. Each electromagnet assembly is constructed to form a closed magnetic loop when energized.
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