Control for automatic buttonhole apparatus in zigzag sewing mach

Details Control for automatic buttonhole apparatus in zigzag sewing mach Control for automatic buttonhole apparatus in zigzag sewing mach

1981-06-08

1983-11-22

Schroeder, Werner H.

Sewing

Work manipulating

Guides

112277, D05B 306

Patent

active

044162065

ABSTRACT:
A detection circuit senses whether a buttonhole type presser foot is attached to a sewing machine presser bar and through a control circuit enables or disables pattern selection switches for machine operation other than a buttonholing mode.

REFERENCES:
patent: 3926133 (1975-12-01), Herron et al.
patent: 4048932 (1977-09-01), Odermann et al.
patent: 4182249 (1980-01-01), Matumura et al.
patent: 4248167 (1981-02-01), Reinert
patent: 4289084 (1981-09-01), Takenoya et al.

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