Decorative stitch formation

Details Decorative stitch formation Decorative stitch formation

1978-09-25

1981-03-10

Schroeder, Werner H.

Sewing

Elements

Tensioning

112 79A, D05B 4704

Patent

active

042547237

ABSTRACT:
A sewing machine attachment and method for use in connection with multiple thread sewing machines to provide selective control of decorative stitch formation to selectively vary either pattern amplitude, or frequency of pattern repeat or both. A selectively adjustable variable speed drive is employed to drive a cam shaft carrying a plurality of selectively adjustable cams one for each thread forming the pattern which cams bear against a plunger acting to control the position of the selectively adjustable pressure plates forming the thread tensioners through which the threads of the machine are guided. By varying either speed and/or cam position and/or thread tensioner plate pressure different stitch formation can be obtained.

REFERENCES:
patent: 485546 (1892-11-01), Hunt
patent: 670078 (1901-03-01), Humphrey
patent: 741035 (1903-10-01), Hemleb
patent: 851082 (1907-04-01), Fischer
patent: 2158197 (1939-05-01), Pikul
patent: 2191046 (1940-02-01), Tiesler
patent: 2932339 (1960-04-01), Odenweller
patent: 3001388 (1961-09-01), MacCaffray
patent: 3356050 (1967-12-01), Urscheler
patent: 3906876 (1975-09-01), Fitton
patent: 4016821 (1977-04-01), Minalaga

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