Needle driving apparatus for sewing machines

Details Needle driving apparatus for sewing machines Needle driving apparatus for sewing machines

1980-04-30

1981-03-10

Nerbun, Peter P.

Sewing

Elements

Driving mechanisms

74103, D05B 5514

Patent

active

042547229

ABSTRACT:
An apparatus for selectively changing the distance of needle travel in a sewing machine in which the needle is carried by a needle clamp and reciprocated by a crank driven control lever along a pathway defined by a fixed guide bar. One end of the control lever has a lever pivotably connected thereto and the opposite end of this lever is pivotably connected to an eccentrically mounted and selectively positionable pin that protrudes from the machine's housing. Each of the available positions of the pin provide a means for effecting a change in the distance a needle travels during seaming for the purpose of accommodating workpieces of different thicknesses.

REFERENCES:
patent: 3645221 (1972-02-01), Hirayama
patent: 3745951 (1973-07-01), Marforio

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