Electronic pattern control for a sewing machine

Details Electronic pattern control for a sewing machine Electronic pattern control for a sewing machine

1977-07-29

1979-02-27

Nerbun, Peter

Sewing

Work manipulating

Guides

D05B 302

Patent

active

041413059

ABSTRACT:
A logic circuit generates in succession the stitch-control data for the successive stitches of a selected stitch pattern. The logic circuit does not store simultaneously all the stitch-control data for all the stitches of all the selectable stitch patterns, in the way done by conventional addressable random-access stitch-pattern memories. Instead, the logic circuit assumes successive states, in response to successive machine-synchronized pulses. In each state it generates, in the sense of bringing into existence for the first time, stitch-control data for the next stitch to be produced, this stitch-control data being derived from data related to a preceding stitch, e.g., the stitch-control data for the preceding stitch. The number of logic elements needed is low compared to that needed for a random-access stitch-pattern memory of the type storing all the stitch-control data for all the stitches of all the selectable patterns.

REFERENCES:
patent: 3872808 (1975-03-01), Wurst
patent: 3965830 (1976-06-01), Dorosz
patent: 4086862 (1978-05-01), Makabe et al.

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