Tension selecting mechanism for sewing machines

Details Tension selecting mechanism for sewing machines Tension selecting mechanism for sewing machines

1978-03-31

1979-12-25

Reynolds, Wm. Carter

Sewing

Elements

Tensioning

D05B 4702

Patent

active

041800060

ABSTRACT:
A mechanism for selecting the tension setting of a needle thread tension device for sewing machines. A slot is formed in the face of the sewing machine arm top cover through which extends an operator influenced tension selecting knob. The tension device for influencing the needle thread tension is connected to the tension selecting knob by a leaf spring and lever fulcrummed to the arm top cover. Movement of the tension selecting knob along the slot in the arm top cover varies the force exerted on the needle thread by the tension discs contained within the tension device.

REFERENCES:
patent: 119589 (1871-10-01), Estabrooke
patent: 473564 (1892-04-01), Allen
patent: 2609772 (1952-09-01), Casas-Robert
patent: 3081722 (1963-03-01), Peloggio
patent: 3557731 (1971-01-01), Casas-Robert
patent: 3667414 (1972-06-01), Illes et al.
patent: 4141306 (1979-02-01), Weber

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