Mechanism for actuating the hook and claw and for stitch setting

Details Mechanism for actuating the hook and claw and for stitch setting Mechanism for actuating the hook and claw and for stitch setting

1986-03-03

1987-09-15

Hunter, H. Hampton

Sewing

Stitch forming

Chain or double chain

112169, 112315, D05B 106, D05B 2722

Patent

active

046931945

ABSTRACT:
In an actuating mechanism for the hook of portable sewing machines, a hook actuating profiled cam is provided which has a pin for simultaneously actuating the hook and the material transport feed dog through an interposed linkage having an adjustable element. By providing the hook formed with an eye, a double chain stitch seam can be effected. By further providing the cam with a depression for accommodating a foot of the hook therein during an oscillation of the foot, a greatly reduced overall size becomes achievable. Thanks to the adjustable element it also becomes possible to change the stitch length.

REFERENCES:
patent: 2538565 (1951-01-01), Johnson
patent: 2720853 (1955-10-01), Artzt
patent: 3952674 (1976-04-01), Hirayama
patent: 4311105 (1982-01-01), Buzzi
patent: 4543896 (1985-10-01), DeSantis

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