Variably controllable bobbin thread pull-off mechanism

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

1981-03-23

1983-04-26

Reynolds, Wm. Carter

Sewing

Elements

Revolving hooks

D05B 5714, D05B 5726

Patent

active

043809618

ABSTRACT:
A variable pull-off mechanism for a sewing machine is provided with a thread pull-off disc on a rotatably mounted shaft which is concentric with the drive shaft of a vertical axis looptaker. The disc is formed with thread catching edges which engage and pull-off thread from a bobbin as the disc is oscillated between a fixed and a controllable position in accordance with the operation of a servomotor responsive to various control signals.

REFERENCES:
patent: 3155061 (1964-11-01), Goebel et al.
patent: 3164113 (1965-01-01), Ketterer
patent: 3693565 (1972-09-01), Ketterer
patent: 3693566 (1972-09-01), Ketterer
patent: 4091753 (1978-05-01), Johnson et al.
patent: 4182250 (1980-01-01), Johnson
patent: 4215639 (1980-08-01), Johnson
patent: 4232618 (1980-11-01), Ketterer

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