US1072489A - Attachment for sewing-machines. - Google Patents

Description

A. N. OATHOUT. ATTAGHMBNT PoR SEWING MACHINES.

APPLIOATION FILED APB.. 18, 1911.

Patented Sept. 9, 1913.

3 SHEETS-SHEET 1.

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A. N. DATHOUT. l ATTACHMENT PoR SEWING MACHINES.

APPLICATION FILED APR.18, 1911.

1,072,489, l Patented sept.9,1913.

3 SHEETS-SHEET 2.

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A. N. OATHOUT.

ATTACHMENT EOE SEWING MACHINES.

APPLIGATION FILED APR.18, 1911.

3 SHEETS-SHEET 3.

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ni) s'rnrns 'arrivai nitro n .ARTHUR N. OATI-IOUT, 0F GLOVERSVILLE, NEWYORK, ASSIGNOR 'IO EDWIN L. MEYERS AND DAVID F. MEYER, 'CONSTITUTING THE FIRM OF LOUIS IVIEYERS & SON, OF

NEW YORK, N. Y.

Specification of Letters Patent.

ACWIAGHVMENT. Fon SEWING-MACHINES.

Patented Sept. 9, 1913.

To all 'whom/t mayl concern Beit known that I, 'ARTHUR N. OATHoU'n a citizen `ofthe United States, and resident of Gloversville, Fulton^county,fNew York,

tachment for Sewing-Machines, of which the following is a specification.

My invention relates to anl attachment for sewing machines, particularly adapted" for use in connection with machines such as are ordinarily used in making gloves, that is, making the seams and-trimming stitches.

The inventionhas for its object toprovide such machines with an attachment whereby at the will ofthe operator the threads may be automatically knotted on-'the linside of the glove atany pointlduring the operation andinstantly restored to thel properlyv adjusted sewing position, thereby avoiding the disadvantages of the present process according to which all of thefknotting of the threads is done-by hand'.

It 'will not befnecessary Jto-describe the sewing machine as a whole, except in so far as certain elements thereofiare"necessarily described-in Iorder to show the cooperation of the parts of the machine with the action of my attachment since the machines as such are the usual sewing machines, the construction of which isr fully known. The 'funda mental principle upon which my attach ment causes the sewing machine `itself to knot the threads'is a known principley and it will 'therefore be sufIici'entto define it by stating that theA sewing machine 'will vknot the thread on the under surface ofthe'fabric through which the needlepasses if the fabric feeding devices are temporarily thrown out of operation so that the needle passes through the same aperture two or three times in succession. 4

invention provides anv attachment which may readilyI be appliedto any existing sewing machine, and lwhich enables the f operator, without necessarily removing his i hands from'the work, to' throw out of operation the' fabric-feeding devices and alsof to cause such feedin'gfdevices to: resume their normal operationy at the exact adjustment as t-o length yofstitch etc. to which the machine had been previously set.

The invention'is illustrated'in the accom* panying drawings, in which the preferred -foriniof my invention is illustrated as ap-V ypliedto what is known as a Wheeler `& VVVi'lson glove-stitching machine.

have invented -al certain new and useful Ati In the drawings Figure 1 is a horizontal section through the apron of the machine,

i taken along the line 1.-1 ofFig. 2; Fig. 2 is'lan end '.elevation, taken from the right of Fig.v l; Fig. 3 is a partialV transverse section taken along the line BH3 of Figfl; Fig. 4 is a similar section, taken along the line 4 4 of Fig. 1;` Fig- 5 isa similar section taken along the line 5 5 of Fig. 1; and Fig. 6 correspondsto the-left hand side of Fig. 2 with themechanism in released position.

- A bed plate 1 is provided with a depend-` ent marginal apron 2 'and an end pedestal 3; the endf'portions `of the apron together with'transverse'ribs 4, 4 and the pedestals are `provided with suitable bearingsto receivey the various, operative shafts and spindles.

Themachine is driven by a belt 5 which engages a pulley fixed'to shaft 6 and this shaft by means ofran eccentric or cra-nk (not shown) and links 7 7 drives shaft 8 `sup ported by the apron 2.

Pivotally attached to rib 4 at9 is a rocking lever 10 (Fig. provided at one end with a yoke 11 embracing a cam 12 fixed to shaft 8, and at the other end with an inshort arm 22 fixed to' a shaft 28. This shaft 23 carries a second larm23 (Fig.A 4) provided' withra yoke 24 embracing a cam 25, fixed to one end of shaft S, (as shown in Fig. 1.) A spring Q6 (Fig. 5) keeps the link 19 pressedagainst the slide 21. f

Supported inthe pedestal -3 (shown in dotted lines at the right of Fig. l1 Vand in section inFig. 3) is a'spind'le 27, having fixed thereto an arm 2S between the end of which and the link 15, and pivotally attached to both, is a link 29.

At the end of spindle 27, outside the pedestal, is fixed a feed control lever 30 (see Fig. 2) having an eye in its outer end through which is passed a rod 31, having its vupper part screw threaded. A pair of check nuts 32 are fixed to the rod above the eye, and an adjustable nut 33 is similarly fixed below t-he eye. The rod 31 is long enough to pass through a suitable guide hole in the bed plate 1, and is connected below by a chain 34 to a foot treadle 35. A spring 36 kept under compression by the nut 39 is interposed between the bed plate 1 and the nut 39, and keeps the rod 31 and control lever 30 normally in the upper position as limited by the pin 40 projecting in the path of the abutment 41 of the arm 30. Below the control lever and near its outer end is a stop screw 38, threaded in a support 37, which rises from the base plate.

From the above description it will be apparent that the feeding of the fabric is controlled by the amount of forward movement which is given to the feeder 20(Fig. 5). The length of stitch is controlled initially by setting the shaft 27 (Fig. 3) to the desired position. This will cause the block 14 on the link 15 to change its position with reference to the axis of motion of the lever 10 and consequently effects to a greater or less degree the rocking of the shaft 17 which controls the forward and backward movement of the feeder 20. When, however, the block 14 is placed in a position corresponding with that of the axis of motion of the lever 10, then the shaft 17 will not rock at all and the feeder 20 will be moved neither fo-rward nor back, and this, without affecting any other part of the sewing machine. The

up and down movement of the feeder 2O is controlled by the shaft 23, the arm 22 and slide 21 (Fig. 5) the stitching mechanism, the needle and all the other mechanism of the machine will continue to operate and perform their functions precisely as at other times.

The operation of the machine provided with my attachment isas follows: The machine is first put into the ordinary operating condition and thelength of the stitch determined by an adjustment of the stop screw 3S and the apertured lever 30, so that when the treadle 35 is in the depressed condition shown in Fig. 2, a certain predetermined length of stitch will be taken by the machine. In this position the stop nuts 32 depressing the end of lever 30 cause the lever 30 to rest upon the head of the screw 38. In that position the machine carries out its normal operation of producing a series of equal stitches by feeding the fabric intermittently beneath the needle and below these parts all rocking action of the shaft 17 and consequently all forward and backward movement of the feeder 20. In other words, when the treadle 35 of Fig. 2 is released, it instantaneously assumes the position shown in Fig. 6 and in that position the fabric will cease to feed through the machine but the needle will pass several times through the same hole and cause the thread to be knotted automatically on the under side of the fabric. The operator may then at will, by merely depressing the treadle 35, either continue the same trimming stitch, or may take the fabric out of the machine and relocate it therein so that a new seam or trimming stitch may be begun at some other point. As soon as this readjustment of the fabric has been brought about, the treadle 35 is depressed and the machine begins to sew not only regular stitches, but stitches exactly and precisely the identical length as those for which the machine had been originally adjusted.

It is obvious that instead of normally depressing the treadle 35 the attachment could be so reconstructed that the operation is reversed and that the normal operation of the machine may be carried on during the undepressed condition of the treadle and the feeder be thrown out of operation when the treadle is depressed. Many modifications may also readily suggest themselves to anyone skilled in the art and are therefore within the scope of this invention.

I am aware that it is not new to throw the feeder out of operation in a sewing machine, or to cause the thread to be knotted on the under side of the fabric and allow the needle to pass several times through the same aperture, but

What I do claim is:

An attachment for sewing machines comn prising means for controlling the fabric feeding devices, a pivoted arm operatively connected therewith, lever mechanism adjustably secured to said arm, an abutment on said arm movable in the arc of a circle about the pivot of said arm, a fixed stop located in the path ofsaid abutment and adapted to coperate therewith to limit the movement of the arm in one direction, an adjustable stop located on said machine between said fixed stop and said lever mechanism and adjustable toward and away from said arm to limit the movement thereof CTT in the opposite direction, said lever mechas In testimony whereof I have hereunto set nisni being arranged to force said arm my hand in the presence of two subscribing toward said adjustable stop, a compression Witnesses. spring adapted to normally maintain said A ARTHUR N. OATI-IOUT. abutment on the arm in engagement With Witnesses:

said fixed stop and means for adjusting the CHARLES V. STEWART, tension of said spring.

, ALBERT LAROUX.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, '.D'. C.

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