US793007A - Needle and shuttle thread cutting device for sewing-machines. - Google Patents

Description

No. 793,007. PATENTED JUNE 20, 1905. H. 0. MILLER.

NEEDLE AND SHUTTLE THREAD CUTTING DEVICE FOR SEWING MACHINES.

APPLICATION FILED AUG. 1, 1903.

I/z'fnesses. IZZezu 3/ C. 4/1 11: Zk); Juvemar,

4%. fJM/M UNITED STATES Patented June 20, 1905.

PATENT OFFICE.

NEEDLE AND SHUTTLE THREAD CUTTING DEVICE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 793,007, dated June 20, 1905.

Application filed August 1, 1903 Serial No. 167,912.

To (all whom it puny concern.-

Be it known that I, HENRY (J. MILLER, a citizen of the United States, and a resident of Waterford, in the county of Saratoga and State of New York, have invented certain new and useful Improvements in Needle and Shuttle Thread Cutting Devices for Sewing-Machines, of which the following is a specification.

The object of the invention is to provide a threzul-cutting attachment for a sewing-machine which will enable an operator to quickly and conveniently move the needle and shuttle thread along a guide, the needle-thread engaging a holder and held thereby while said thread and the shuttle-thread are simultaneously severed.

After a piece of fabric has been stitched and the needle and shuttle threads have been severed operators have experienced considerable ditliculty in preventing the needle-thread from slipping from the eye of the needle. By my invention I have overcome this difliculty by arranging means by which two threads when moved together will be automatically separated and simultaneously severed.

Other objects and advantages will be hereinafter described and be particularly pointed out in the claims.

In the drawings, Figure l is a plan view of my invention applied to a portion of a sewing-machine. Fig. 2 is a similar view on an enlarged scale. Fig. 3 is a front elevation, the presser-foot to which the invention is applied being down in operative position. Fig. -i is a side elevation, the presserfoot being raised for the withdrawal of a stitched piece of fabric. Fig. 5 is a view similar to Fig. 4: with the presser-foot down and ready for stitching. Fig. 6 is a detail enlarged side view of the invention.

Similar letters of reference indicate like parts in the several views.

A indicates a sewing-machine table; B, a needle-bar; 7), the needle; I), the thread carried by the needle; 7) the shuttle, and b the shuttle-thread.

C is a cloth-plate supported from table A.

D is a prcsser-foot secured to the support I), pivoted on a bracket E by a pivot (J.

F is a lever which is connected with support D, to which prcsser-foot D is connected, and serves when pressed down as a convenient means for raising the presser-foot from the fabric on the cloth-plate C, and F is a spring operating to hold the prcsserfoot down.

The parts thus far described are old in the art and form no part of this invention, and further description is deemed unnecessary.

The presser-foot D comprises the two longitudinal bars (1 (Z, which depend from the plate Cr and are adapted to be raised and lowered by operating the lever F. The lower edges of the bars J (l' of the presserfoot are provided with teeth ll (1*, as shown in Fig. 3, and the plate (i is formed with an opening (Hr, Figs. 1 and 2, for viewing the fabric when it is being placed between the cloth-plate. and the presser-foot. The plate Gr is also provided with an extension 7, which is extended forward from the presserfoot l) and is adapted to receive on its upper side the thread-cutting knife H and on its lower side the needlethread holder 1.

As stated, the knife H is mounted on the upper side of the front extension of plate (1 and has its cutting edge /1 made beveled and on a line which is inclined or at an angle in relation to the edge of the extension 1, as shown in Fig. 2, so that the cutting edge of the knife may run forward and off from the top surface of plate G. In the forward edge of the plate (ir is a notch lt, forming a temporary threzul-retainer for the needles and shuttle-thrczuls l1 and b preparatory to being severed. The notch prevents the operator drawing the threads off the edge y when taking the fabric from under the presser-foot, which would necessitate considerable loss of time, as will be readily understood. The knife H. is adjustable in relation to the clothplate and is preferably made so by slot if and the binding-screw A, by means of which the knife may be removed for sharpening and be replaced and adjusted as may be required.

To the under side of the extension r of the plate Gr is secured by a rivet passing through an extension 5, a tln'cad-retainer I, which is made to yield to gently press on the needlethread when drawn away from notch /1/ toward the point It, where the edge of the knife intersects the edge of the plate G, as will be hereinafter explained. The yielding threadretainer is constructed of thin steel and is secured in position back of edge h of the knife H, with its front edge e' in alinement with the edge g, as shown in Figs. 2 and 6. The free end of this thread-retainer is provided with a downwardly-extending lip e", adapted to guide the needle-thread between the upper side of the retainer 1 and the lower side of plate extension g, the thread being held and prevented from being drawn out and becoming loose.

When the piece of fabric (not shown) has been stitched and ready for removal from the sewing-machine, the operator will draw down thelever F, which elevates the presser-foot, to free the fabric and allow of its being removed. The operator will in removing the stitched fabric carry the needle-thread 7/ and the shuttle-thread 6 into the temporary threadretainer notch 71/. The stitched piece having been removed, the operator will quickly move it in the opposite direction, which will carry the threads 7) toward the knife-edge 7L, and by reason of the positions of the parts the needle-threads 7) will be caught by the holder I, while the shuttle-thread will pass it, and by a continued movement of the two threads they both engage the edge of the knife and are simultaneously severed thereby. The threads having been severed, the free end of the shuttle-thread 71 drops onto the clothplate, while the severed end of the needlethread 6 is held by the holder with relation to the eye of the needle, which enables me to tightly close on the shuttle-thread at the first stitch when stitching the next piece of fabric. It will therefore be understood that by the several operations of the respective parts the shuttle-thread may be severed at a point to leave a suflicient length of thread to fall to be clamped between the cloth-plate and the fabric to be stitched, so that it will at first commencement of stitching be in proper place.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. The combination with a presser-foot of a sewing-machine and a plate which is stationary in relation to said presscr-foot, one edge of said plate being formed with a notch to provide a temporary thread-retainer, a threadholder spaced from the temporary thread-reof front edge of said plate, a temporary threadretaining notch formed in the plate for assembling the needle-thread and lower thread, a thread-retainer fixed to the said plate and adjacent the cutting edge of the knife adapted to receive the needle-thread and hold same when moved along the edge of the plate from the temporary retainer, the needle-th read and lower thread being simultaneously severed by the knife.

3. A combined thread cutter and holder comprising a plate, a thread-holder on the plate, a knife on the opposite side the plate and spaced by the latter from the holder, the edge of the plate serving as a guide for two threads, one of which is caught by the holder and both threads being severed by the knife.

4. The combination with a presser-foot of a sewing-machine, of a thread-cutting blade which is held stationary in relation to the presser-foot, the blade being relatively forward of the presser-foot with its cutting edge toward the same, of an elastic needle-thread retainer secured in place below the plane of and spaced from the cutting edge of the blade, the blade and elastic retainer being so positioned with relation to each other that a needle-thread will be held by the retainer and a lower thread pass free of the same, the two threads being simultaneously severed.

5. The combination with a plate which is connected with a presser-foot of a sewingmachine, of a thread-cutting blade which is mounted on the said plate, and is adapted to be adjusted longitudinally on the same and has its cutting edge at an angle in relation to the line of the forward edge of said plate, a thread-assembling notch formed in the edge of the plate in front and to one side the needle, a needle-thread-retaining device opposite the said cutting-blade and beneath the said plate, and means for raising and depressing said plate.

6. The combination with a cloth-plate, a presser-foot, mechanism adapted to elevate and depress said presser-foot, a plate which is stationary in relation to said presser-foot, an extension on the plate, a thread-retainer, a thread-severing blade connected with the upper side of an extension of the plate and arranged to have its cutting edge at an angle to the front edge of the extension, a thread-assembling notch formed in the plate, the edge of the plate serving as a guide for guiding the assembled needle and shuttle threads to the point of intersection of the cutting edge of the blade with the edge of said plate, one of said threads engaging the thread-retainer.

7. A sewing-machine attachment comprising a thread-holding device, a knife spaced from the thread-holding device, and a guide between the thread-holding device and the presser-foot, a knife, a thread-holder spaced from the knife, and a guide between the knife and thread holder, the knife and threadholder being so located relative to the sewing machine that when the presser-foot is elevated, at selected thread can be held by the threadholder, and the needle and lower threads will be simultaneously severed, both threads being directed by the guide.

2). A thread holding and cutting device comprising a plate formed on one edge With a notch to provide a temporary thread-holder, a thrcadholding device fastened under the plate, a knife on top of the plate and spaced from the thread-holder, the temporary threadholder and thread-holding device being spaced from each other.

10. In combination, a sewing-machine comprising stitching mechanism, amovable presser-foot having a plate, and a throat-plate formed with an opening below the presscrfoot, a knife, a thread-holding device under the plate and adjacent the knife, the knife and tlnead-holder being positioned with relation to the plate of the presscr-foot and throatplate, so that when the presser-foot and plate are elevated the needle-thread when drawn along the edge of the plate will be in line to engage the thread-holder and the lower thread will pass the holder, both threads engaging the knife and being severed thereby.

11. In combination, a sewing-machine provided with a presser-foot, a throat-platehaving an opening, a thread-holding device, a guide, and a knife positioned relative to the thread-holder so that when the presser-foot is raised the position of the thread-holder will be such that the needle-thread may be guided to and held by said thread-holding device, said needle-thread and the lower thread upon further movement on the guide will engage the knife and be severed thereby.

HENRY (I. MILLER.

\Vitncsses:

ALEX. Smamuc, (humans SIGLKULK.

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