The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 1979
Filed:
Feb. 22, 1978
Jimmie D Scott, Harrison, TN (US);
Spencer Wright Industries, Inc., Chattanooga, TN (US);
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.