Combination presser bar lifters and pressure controls

Details Combination presser bar lifters and pressure controls Combination presser bar lifters and pressure controls

1976-10-26

1977-11-01

Krizmanich, George H.

Sewing

Elements

Presser devices

D05B 2902

Patent

active

040560716

ABSTRACT:
A presser device for a sewing machine having a rockable member pivotably carried by the sewing machine frame and connected to a presser bar to axially move the same up or down, a pivoted lever urged by a spring towards the rockable member, and, a drag link carrying a roller on one end, which roller extends between the pivoted lever and one of two surfaces above and below the pivot of the rockable member to urge the presser bar upwardly or downwardly, respectively. Presser bar pressure is varied by varying the spacing between the roller and the pivot of the rockable member. Two embodiments are disclosed, a first wherein the position of the roller is varied by means of a second pivoted lever connected to the drag link; and, a second wherein a pair of push buttons operate on a bell crank connected to the drag link, one of the push buttons incorporating a cam to control movement of the drag link.

REFERENCES:
patent: 3473497 (1969-10-01), Cash
patent: 3669050 (1972-06-01), Adams
patent: 3793969 (1974-02-01), Adams
patent: 3815529 (1974-06-01), Adams et al.
patent: 3960098 (1976-06-01), Papajewski et al.

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