Yarn feed roller assembly

Details Yarn feed roller assembly Yarn feed roller assembly

1978-02-22

1979-01-16

Feldbaum, Ronald

Sewing

Special machines

Buttonhole

112 79A, 226108, D05C 1500

Patent

active

041343484

ABSTRACT:
A yarn feed roller assembly for a tufting machine pattern attachment for controlling the amount of yarn supplied to the needles of the machine in accordance with a pattern. The assembly includes a plurality of roller sets, each roller of the set having an inner race secured for rotation to a shaft driven at a different speed than the other rollers of the set. The roller also has an outer race journally supported on the inner race for rotation relative thereto. The outer race has a toothed ring at the inner circumference and the inner race carries a plurality of toothed segments adapted for coupling engagement with the ring to drive the outer race. The segments are comprised of magnetic material and an external magnetic field is selectively energized to attract the segments of one or the other rollers into engagement with its ring to feed yarn at the rate of the selected roller.

REFERENCES:
patent: 3103903 (1963-09-01), Broadrick et al.

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