Needle bar drive for a buttonhole sewing machine

Details Needle bar drive for a buttonhole sewing machine Needle bar drive for a buttonhole sewing machine

1996-04-08

1998-08-25

Lewis, Paul C.

Sewing

Elements

Driving mechanisms

112 65, D05B 6900, D05B 306

Patent

active

057973377

ABSTRACT:
A counter-weighted eccentric or crank is clamped to an end of the upper drive shaft. A link is pivoted between the eccentric and an end of a short leg on a V-shaped rocker. The base of the V-shaped rocker is pivoted on a fixed pin. The long arm of the V-shaped rocker is connected to a needle bar to drive the needle bar up and down. The movement of the needle bar carries a main needle and thread through a workpiece to make stitches in the cloth.

REFERENCES:
patent: 1771670 (1930-07-01), Carlson
patent: 2250696 (1941-07-01), Avis
patent: 3450081 (1969-06-01), Rabinow
patent: 4369721 (1983-01-01), Bolldorf et al.
patent: 4441441 (1984-04-01), Bianchi
patent: 4452157 (1984-06-01), Cantada et al.
patent: 4569297 (1986-02-01), Dusch
patent: 4616585 (1986-10-01), Marcandalli
patent: 4967677 (1990-11-01), Seiriki et al.
patent: 4981093 (1991-01-01), Schopf
patent: 5507239 (1996-04-01), Fujii et al.

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