Needle bar pattern shifting device

Details Needle bar pattern shifting device Needle bar pattern shifting device

1975-10-08

1976-08-03

Hunter, H. Hampton

Sewing

Special machines

Buttonhole

D05C 1530

Patent

active

039722953

ABSTRACT:
A patterning device for a tufting machine having a reciprocating needle bar slidably mounted for lateral movement. The patterning device has a pair of solenoid actuated pawls mounted on the tufting machine head above the needle bar, and a pair of ratchet members mounted on the needle bar for cooperating with a respective pawl. The solenoids are individually controlled by a programmable pattern controller driven in synchronization with the tufting machine so as to engage the pawls selectively with the respective ratchet to force the needle bar to shift laterally. One pawl and ratchet acts to shift the needle bar to the right, and the other to the left. A centering tooth intermediate the pawls cooperates with an alignment plate to ensure precise shifting, and a needle bar locking tooth on the needle bar cooperates with a centering dog on the bed of the tufting machine to ensure that the needle bar does not shift while it is within the work piece.

REFERENCES:
patent: 3026830 (1962-03-01), Bryant et al.
patent: 3511976 (1970-05-01), Neidenberg et al.
patent: 3596617 (1971-08-01), Watkins

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