Multi-stitch cam needle bar shifter for tufting machines

Details Multi-stitch cam needle bar shifter for tufting machines Multi-stitch cam needle bar shifter for tufting machines

1981-04-13

1983-07-12

Feldbaum, Ronald

Sewing

Special machines

Buttonhole

D05C 1500

Patent

active

043924409

ABSTRACT:
A tufting machine having a pattern cam needle bar shifting mechanism includes an indexing device for driving the cam intermittently so that the cam remains stationary during a portion of the needle bar cycle, that portion being at least during a portion of the time the needles are within the needle plate. A one-way ratchet clutch drive driven from an eccentric on the main shaft of the tufting machine supplies the intermittent motion to the cam in one embodiment of the invention. A positively acting brake to prevent the fly wheel effect on the pattern cam ensures a positive stopping and commencement of the stationary state.

REFERENCES:
patent: 3213813 (1965-10-01), Chambers
patent: 3964407 (1976-06-01), Ingram et al.
patent: 3964408 (1976-06-01), Smith
patent: 4173192 (1979-11-01), Schmidt et al.
patent: 4201143 (1980-03-01), Jackson
patent: 4282818 (1981-08-01), Ingram
patent: 4285287 (1981-08-01), Inman

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