Electronic sewing machine with back stitching system

Details Electronic sewing machine with back stitching system Electronic sewing machine with back stitching system

1979-01-02

1980-12-02

Nerbun, Peter P.

Sewing

Work manipulating

Guides

112317, D05B 302, D05B 2700

Patent

active

042364680

ABSTRACT:
Arrangement for forming patterns made up of stitches in an electronic sewing machine includes a static memory comprised of a plurality of storage units, stitch forming means operatively connected to the outputs of the storage units for producing any of different stitches in dependance from the signals produced at the outputs of the memory, addressing means for applying to the address signal inputs of the memory next-address signals derived from the signals produced at the outputs of the memory, synchronizing means for activating the addressing means synchroniously to operation of the stitch-forming means and back-stitching means for changing the next-address signals in accordance to the required back stitches. The back-stitching means include a manually operated switch, a free running oscillator operatively connected with said switch to activate the addressing means, and comparator means for comparing the next-address signals produced before the manually operated switch is activated with those produced after said switch is operated.

REFERENCES:
patent: 3977338 (1976-08-01), Wurst et al.
patent: 4086862 (1978-05-01), Makabe et al.

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