Open end spinning frame with a magnetic switch for sliver feed

Details Open end spinning frame with a magnetic switch for sliver feed Open end spinning frame with a magnetic switch for sliver feed

1977-08-09

1978-05-30

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Unitary multiple twist devices

57 81, D01H 112, D01H 1316

Patent

active

040916065

ABSTRACT:
Open end spinning apparatus is provided which includes a magnetic reed switch for controlling sliver feed. A yarn sensor magnet attached to a movable yarn sensor engageable with a running yarn is disposed so as to open the magnetic switch and interrupt sliver feed upon occurrence of a yarn breakage. In order to prevent the need for moving the yarn after a piecing operation so as to properly engage the yarn sensor, an auxiliary magnet is provided which is movable into position to magnetically move the yarn sensor away from a blocking position in front of the yarn takeoff passage at a spinning unit. The auxiliary magnet is controlled by way of its position, and/or its magnetic field strength, so as to also selectively control the operation of the magnetic reed switch during piecing operations, while maintaining the sensor magnet, and yarn sensor out of a blocking position in front of the yarn takeoff passage.

REFERENCES:
patent: 3370800 (1968-02-01), Haberkern
patent: 3676990 (1972-07-01), Santerre et al.
patent: 3727393 (1973-04-01), Mikulecky et al.
patent: 3764773 (1973-10-01), Merkle
patent: 3782089 (1974-01-01), Landwehrkamp
patent: 3967224 (1976-06-01), Seeley

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