Bobbin thread control means for a lock stitch sewing machine

Sewing – Stitch forming – Revolving-hook type

Patent

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Details

112243, 112316, D05B 5714, D05B 4900

Patent

active

041822501

ABSTRACT:
A lock stitch sewing machine is provided with mechanism operable by a feed dog for pulling thread for stitches from a bobbin spool in amounts predetermined by the setting of a stitch length regulator.

REFERENCES:
patent: 1105968 (1914-08-01), Diehl et al.
patent: 1635493 (1927-07-01), Moffatt
patent: 1792237 (1931-02-01), Parkes
patent: 2350965 (1944-06-01), Muecke
patent: 3164113 (1965-01-01), Ketterer

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