Sewing machine control device

Details Sewing machine control device Sewing machine control device

1983-02-04

1985-04-09

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

D05B 6918, D05B 6920

Patent

active

045094454

ABSTRACT:
A control device for a sewing machine, in which the numbers of stitches in forward and backward feed of an article to be sewed are preset, comprises: a reverse-stitching electromagnetic operating unit for reversing the direction of feed of the article; a control unit for applying instruction signals to the electromagnetic operation unit to control the latter; and delay means for controlling the operation delay time between the turning "on" or "off" of the electrical instruction signal which is applied to the electromagnetic operating unit by the control means and the turning "on" or "off" of the electromagnetic operating unit. The time instant that the instruction signal is turned "on" or "off" by the control means is caused to occur a period of time, corresponding to the operation delay time, earlier than a predetermined time instant, so that the number of stitches preset is equal to the number of stitches actually formed.

REFERENCES:
patent: 4154179 (1979-05-01), Arnold
patent: 4182252 (1980-01-01), Yoneji et al.
patent: 4195582 (1980-04-01), Novick

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