US 4,195,582 AGranted

Sewing machine stitching control system

AssigneeTeledyne Mid-America Corporation

InventorsSheldon Novick, Carl M. Wenrich

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Abstract

An adjunct control system for electronically controllable sewing machines which increases the flexibility of the sewing system by providing the functions of mechanically programmable stitch counting for each of a predetermined number of stitching sequences, programmable needle positioning, reverse stitching, thread trimming and wiping, and manually selected program interruption for selected conditions. A micro-processor auxiliary control system is utilized which is interfaced with a standard commercially available sewing machine control system in such manner that the sewing machine may be used in either its standard mode of operation without the micro-processor control, or may be used under micro-processor control. The micro-processor includes a central processing unit, a program memory, read/write storage, a control decoder and input/output devices for accessing the CPU and for interchanging control signals between the micro-processor and the standard sewing machine control system.

Claims17

Dependent claims

A sewing machine stitching control apparatus for use in conjunction with a sewing machine having a sewing head, means for forwardly and reversely stitching and for braking to a stop the needle of the sewing head, and means for signalling the needle position, said control apparatus comprising in combination,

(a) selectively operable first means for generating a first stitch signal corresponding to forward or reverse stitching,
(b) second means for generating a second stitch signal corresponding to a desired number of stitches to be made by the sewing machine,
(c) storage means operatively couplable to said first and second means for storing said first and second stitch signals,
(d) command means for generating a command signal directing the commencement of sewing by the sewing head, and
(e) control means operatively coupled to said sewing head drive and braking means, said needle position signalling means, said storage means and command means effective responsive to receipt of said command signal to examine said stored first and second stitch signals and automatically actuate said sewing head needle to stitch the number of stitches designated by said second stitch signal in the forward or reverse direction as designated by said first stitch signal, and to automatically stop said sewing head needle when the last of the designated number of stitches has been completed.

2 more elements

Dependencies are inferred from the claim text.