Sewing – Work manipulating – Guides
Patent
1981-11-19
1983-12-27
Nerbun, Peter P.
Sewing
Work manipulating
Guides
112158E, D05B 302
Patent
active
044223943
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for making a seam choice, and is especially relates to a built-in sewing guide in an electronic sewing machine with an electronic seam memory for the supply of stitch data to the needle positioning and cloth feeding mechanisms.
Electronic fancy seam data systems for sewing machines have, in general, among other things, an input selector, e.g. a set of push button switches with a row of symbols showing the seam the machine will sew, when a push button referred to a certain symbol is actuated. The choise of one of the several symbols and eventually other controls must, however, be made by the operator. This can be difficult with regard to the selection of cloth quality and the appropriateness of the several seams. Most sewing machines have a manual which provides advice on the adjustment of the machine. If it provides an extensive programme of fancy seams, such a manual will be large and inconvenient and confuse the one who operates the several controls. The prior art therefore presented arrangements in fancy seam data systems having an input selector with a so called cloth control as an essential feature, since the several textures or qualities of sewing stuff demand quite different adjustments on the machine, even if one and the same function of the performed seam exists. Stich codes for every seam are stored in the electronic start memory. A address word from the input selector adjusts e.g. a counter to the first stitch code of the selected seam. Adjustments on another texture or another function provide an address word representing such other adjustments which release codes for another seam, etc. The address counter releases the code words of the subsequent stitches one by one from the memory in a known manner when the fancy seam is sewn.
However, the art here referred to permits a plurality of different seam patterns for one and the same function (or operation). Modern sewing machines have, for instance for the operation "Sew together", at least three different seams i.e. straight seam, zigzag seam and reinforced straight seam. The plurality of alternative seams for every operation could make the sewing complicated, if there were no effective instruction accessible at or on the machine. The present invention is related to a system for making the information on the several alternatives for every operation accessible, that is introduced and stored in the memory of the machine. The seams which are less suitable in a certain combination of texture and operation are not shown on this information. Switch means are provided at the symbols for the shown suitable seams for selection of these seams. When such a seam is selected, the input selector supplies a start address to the counter, and feeding of ideal data for the cloth and operation in question is effected from the stitch memory. The advantage of such a system residing in the fact that the operator directly after the adjustment of the cloth control obtains information for the next adjustment referred to the operation.
An embodiment of a sewing guide according to the invention is described in the following disclosure with reference to the attached drawings wherein
FIG. 1 shows a control panel on the front surface of a sewing machine,
FIG. 2 shows the same panel but a certain adjustment of a rotary control thereon,
FIG. 3 is a wiring diagramme of the indicating means in the panel,
FIG. 4 is a wiring diagramme of the input selector in the panel.
On a sewing machine provided with a post 10 and an over-arm 11 there is mounted a control panel 12 with indicating means 13, buttons 14 and a rotary control 15, which are used for informing the electronic system 16 of the machine of a certain seam selection. The rotary control is used for making a preadjustment on a series of seam patterns, e.g. utility seams, of which at least one can be selected on the buttons 14. Such a rotary control is suitably constituted of a binary converter with for instance four output lines 17 on which an output four bit code represents a cer
REFERENCES:
patent: 4166423 (1979-09-01), Brienza et al.
patent: 4236467 (1980-12-01), Tanaka et al.
patent: 4270472 (1981-06-01), Suzuki et al.
patent: 4292905 (1981-10-01), Widmer
patent: 4370938 (1983-02-01), Bergvall
Husqvarna Aktiebolag
Miller Alfred E.
Nerbun Peter P.
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