US1707577A - Sewing machine - Google Patents

Description

April 2, 192 9. SEELY 1,707,577

SEWING MACHINE Filed Dec. 21. 1922 2 Sheets-Sheet l April 2, 1929. T. H. SEELY 1,707,577

SEWING MACHINE Filed Dec. 21. 1922 2 Sheets-Sheet 2 Patented Apr. 2,

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THOMAS H." sunny,- or MALDEN, MASSACHUSETTS, AssIeNon 'ro UNITED SHOE MA- orrmnnv' oonnonnrron, or rn'rnnson, NEW JERSEY, A oonronnrxon 0F NEW- JERSEY. i Y

SEWING amounts.v

, Application filed December 21,1922. Serial No. 608,292.

The inventionrelates to wax thread lock stitch sewing machines suchas are used in attaching outsoles to shoes;

In doing certain classes of work, as for instance, in sewing the leather outsole to a shoe, it is sometimes desirable to'groove the sole-for the reception of thestitches, and for thispurpose the needle guide has hereto fore been provided witha cutting or -indenting vedgetor forming a stitchreceiving'groovc in the work. In doing certain other classes of work as, for instance, in attaching rubber outsolesto shoes, grooving of the work is' objectionable. It has been necessary, therefore, in order to adaptthe machinefor doing bothclasses of work to provide two needle" guides, one with cutting edgesand one without], and to change the needle guides in changing from one class of work to the other. This is objectionable, particularly in the case of the machine used for shoe'repair work, owing to the delay and inconvenience incident to frequently changing from one needle guide to I the other, and is further objectionable owing to the danger of losing or misplacing the needle guide which is out of use.-

The present invention avoids the above objections to the use of a needle'guide having groove-twining edges by the provision of ac-' tuating' mechanism therefor, which may-be set or adjusted by the operator to cause the guide to be pressed against the work and thus form astitch receiving groove therein or maybe set or adjusted to cause the ad Vance stroke of the "guide to terminate hetore its edges engage or indent-the Work and thus avoid grooving the work without the necessity of changing the guide; i

The preferred form, of the invention is shown in the accompanying drawings in which Fig. 1 is a left hand side'elevation showing so much of a lock'stitch wax'thread sewing machine as is necessary to illustrate the application of the'invention thereto, F

2'is a plan view of the mechanism shown in Fig. 1, Fig. 3 is a detailed front view of the needle guide and its segment, Fig. 4 1s a detailed side elevation ot-the same,Fig. 5 is a detailed plan view of the seam sewed when the needle guide is actuated to groove the worlnFig. 6 is a sectional View through the seam, Fi 7 is a view similar to Fig. 1 showing the position of the'parts when the needle is at the end of its retracting stroke, and Fig,

8 is a view similar tofFig. 1 showing theparts 'adjusted' to avoid grooving the work.

In t e drawings the invention is illustrated as applied to an outsolelock stitch sewing machine having the general construction and 1 modeof operationotthe machine shown and described in Patent No. 473,870, dated April 26, 1892', and known as the Goodyear rapid outsole stitcher. The machine is provided with stitch forming and work feedingdevices such as shown and described in saidpatent,

and including the worksupport 2, and the curved hookfneedle 4 [which "is secured in the needle segment 6. The-needle segment is oscillated by a lever 8 actuated by a cam the cam shaft of'the machine and provided at its forward end with a segment 10', engaging the needle segment.

T he needle guide 12 is provided with groove cutting edges 14 on oppositesides of the I ncedleanid'is secured to the segment 16. The

mechanism for oscillatingithe needle guidef segment is so constructed that it may be readily adjusted by the operator to cause the needleguide to either groove the work or'to avoid groovingthe work. "As shown; the mechanism tor oscillating the needle guide comprises a bell crank lever l8, one arm of which is provided with a segment QO engaging apinion-22 which'in turn engages the teeth of theneedle' guidesegment. The

other arm of the bell crank lever is connected 7 by a'linkQ L with onearm of a lever 26, -the other arm of'whi'oh is connectedby alink 28 witha block30 secured to the needle actuating lever 8; Through these connections the needle guide is advanced'toward the work during the, upward movement of the lever 8 which gives the needle its'torward stroke andis-retracted during the downward movement of the lever which gives the needle its retracting stroke. The levers and links are so arranged and proportioned that the needle guide will advance rapidly into position close to the work during the firstpart of the forward stroke of the needle and will have comparatively little forward movement during the latter part of the forward stroke of the needle. On the'reverse stroke-of the needle the needle guide will remain close to J the work during the first part of the stroke and will be retracted with the needle during the last part of its stroke after itlhas with-- drawn from the work;

In order that the forward stroke of the needle guide may be varied to cause it to either groove or avoid grooving the work means is provided for adjusting the pivotal connections between the link 28 and the lever 26. As shown this means comprises a pivot block 32 which is pivotally connected to the end of the link and is adjustably secured to the lever 26 by an adjusting screw 34;. The front end of the screw is slotted to receive a screw driver so that the operator may quickly and conveniently rotate the screw to adjust the pivot block either into the position indicated in Figs. 1 and 7 or into the position indicated in Fig. 8. W hen the block is located as indicated in Figs. 1 and 7 the forward stroke of the needle guide will be such that it is pressed against the work, thus causing thecutting-edges 14 to cut a stitch receiving groove in the workas indicated in Figs. 3

p to 6. When the block is adjusted into the position indicated in Fig. 8 the forward stroke of the needle guide will be shortened so that the groove cutting edges will not be pressed against the work and thus the needle guide will be so operated as to avoid grooving the work.

In order that the needle guide may be pressed. yieldingly against the work when acting to cut a needle receiving groove therein, and may thus accommodate itself to ditferent thicknesses of work, the link 2a is 3ro- {l0 may be adjusted to regulate the pressure with which the needle guide is pressed against through its pivot stud 46 the stroke of the needle guide with relation to the work may be varied to secure its proper-operation under the different adjustments of the pivot block 32.

vl/Vhile it is preferred to employ the construction and arrangement of parts shown and described in applying the invention to the machine of the patent above referred to 11:

will be understood that this construction and arrangement is not essential and may be varied or modified as found desirable or best suited to the construction and mode of opera tion of the machine to which the invention is to be applied. I

What is claimed is: V t

1. A sewingmachine having, in combination, stitch forming devices including ahook needle, a needle guide having an edge for forming a stitch receiving groove in the work, and means for actuating the needle guide in varying ranges of movement to press the needle guide against the work, or to avoid pressing it against the work.

2. A sewing machine having, in combination, stitch forming devices including a hook needle, a needle guide having an edge for torming a stitch receiving groove in the work, actuating mechanism for the needle guide, and means for adjusting said mechanism to impart varying ranges of movement to the needle guide to press the needle guide against the work or to avoid pressing it against the work.

3. A. sewing machine having, in cornbinatie? stitch forming devices including a hook needle, a needle guide having an edge for i'ormin g a stitch receiving groove in the work, actuating mechanism for the needle guide adjustable to impart varying ranges of movementto the needle guide to press the needle guide yieldingly against the worker to avoid pressing it against the work.

THOMAS H. 'EJEELY.

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