Double-thread hand sewing machine transmission mechanism

Details Double-thread hand sewing machine transmission mechanism Double-thread hand sewing machine transmission mechanism

1994-03-04

1995-03-14

Nerbun, Peter

Sewing

Stitch forming

Hand implements

D05B 9702

Patent

active

053968530

ABSTRACT:
A double-thread hand sewing machine transmission mechanism including a steering gear driven by a motor, a driven wheel, a transmission gear driven by the steering gear to turn the driven wheel, an upper-thread arm reciprocated by the driven wheel to move a needle up and down in making stitches, the improvement includes an under-thread bobbin, an under-thread bar having a locating ring at one end mounted around an eccentric locating ring on the transmission gear at one side and a rack at an opposite end meshed with a toothed portion on the under-thread bobbin and driven to turn the under-thread bobbin back and forth.

REFERENCES:
patent: 2594534 (1952-04-01), Bell
patent: 3745950 (1973-07-01), Kato
patent: 3957004 (1976-05-01), Ketterer
patent: 4501211 (1985-02-01), Seyama

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