Selectively controllable bobbin thread pull-off mechanism

Details Selectively controllable bobbin thread pull-off mechanism Selectively controllable bobbin thread pull-off mechanism

1979-02-02

1980-08-05

Reynolds, Wm. Carter

Sewing

Elements

Take-ups

112323, D05B 2722, D05B 2702

Patent

active

042156394

ABSTRACT:
A lock stitch sewing machine is provided with mechanism controllable by a servo motor for pulling thread from a bobbin, and including a selectively positionable member operably connected with a feed dog and bobbin thread engageable means for causing thread to be pulled from the bobbin by the thread engageable means during downward motion of the feed dog in amounts determined by the position of the selectively positionable member.

REFERENCES:
patent: 715911 (1902-12-01), Warren
patent: 909839 (1909-01-01), Woodward
patent: 1105968 (1914-08-01), Diehl et al.
patent: 1792237 (1931-02-01), Parkes
patent: 2438833 (1948-03-01), Wood
patent: 3164113 (1965-01-01), Ketterer
patent: 3467039 (1969-09-01), Greenwood, Jr. et al.
patent: 4091753 (1978-05-01), Johnson et al.

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