Sewing machine with cam type stitch pattern control

Details Sewing machine with cam type stitch pattern control Sewing machine with cam type stitch pattern control

1984-07-25

1985-10-22

Schroeder, Werner H.

Sewing

Stitch forming

Zigzag

112314, D05B 302, D05B 304

Patent

active

045481440

ABSTRACT:
A sewing machine is equipped with an automatic control assembly for the needle bight and/or the feed dog. The control assembly comprises a control cam block having a plurality of juxtaposed cam track portions to be operatively connected, through a contact mechanism, to the sewing machine needle or to a device for setting the feed dog. The contact mechanism comprises a contact finger which can be set by a handwheel, and a cam track connected to the handwheel, against one of the various cam track portions. The handwheel is mounted on a shaft carrying the control cam block, while the cam track connected to the handwheel forms a ring surrounding the control cam block. The contact finger directly engages the cam track, so that a control assembly of small overall length and having a small number of parts is obtained. To make straight seams, the contact finger can be displaced through the cam track into a position laterally of the control cam block, in which a contact member connected to the finger engages against stepped abutment surfaces of one of a set of switch cams which are also part of the handwheel.

REFERENCES:
patent: 3043252 (1962-07-01), Engel
patent: 3541981 (1970-11-01), Watson
patent: 3786769 (1974-01-01), Coulombe
patent: 3795210 (1974-03-01), Adams et al.
patent: 3807329 (1974-04-01), Daman
patent: 4084523 (1978-04-01), Kasuga
patent: 4095540 (1978-06-01), Kaltenbach et al.
patent: 4106419 (1978-08-01), Fresand
patent: 4244311 (1981-01-01), Sano
patent: 4313389 (1982-02-01), Hanyu et al.
patent: 4497267 (1985-02-01), Szustak et al.

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