Sewing machine with a stitch counter and correction unit

Details Sewing machine with a stitch counter and correction unit Sewing machine with a stitch counter and correction unit

1981-05-13

1983-05-03

Nerbun, Peter P.

Sewing

Special machines

Darning

112272, 112275, D05B 1900, D05B 6920, D05B 6922

Patent

active

043817190

ABSTRACT:
A sewing machine with a presettable counter for sewing a predetermined number of stitches to the end of a stitch seam. According to the invention the counter is provided with a correction unit responsive to at least two sectors of a rotary machine member, each revolution of which corresponds to the sewing of a stitch of normal length. A sensor is responsive to the different sectors and, upon detection of one of these sectors, produces a signal which an evaluating unit can pass to a count resetting unit to set back the stitch counter by one stitch unit. As a consequence, the overrun or underrun of the stitch seam is at most one half of the normal length of a stitch.

REFERENCES:
patent: 4160424 (1979-07-01), Newell et al.
patent: 4226197 (1980-10-01), Pollmeier
patent: 4254724 (1981-03-01), Conrads

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