US923750A - Sewing-machine. - Google Patents

Description

R. G. WOODWARD.

sswma mcmfin. APPLICATION IILBD AI IG. 3, 1901.

Patented June 1, 1909.

176;.2 FIQJ F164 NI ED STATES PATENT OFFICE.

RUSSEL G. WOODWARD, 01: \MHJKEGIN. ILLINOIS, ASSIGNOR TO, UNION SPECIAL SEWING MACHINE 00., OF HIt'AUO, ILLINOIS, A CORPORATION OF ILLINOIS.

SE WING-MACHINE.

Specification of Letters Patent Application filed August 3, 1901. Serial No. 70,795.

Patented June 1, 1909.

I '0 all whom it may concern:

Be it known that I, Rrfssrn; G. X001)- WARD, a c'itizen of the U nitcd States, residing at -Waukegan, in the county of Lake, State of Illinois, have invented certain new and useful i111 rovcmcnts in Sewing-Machines, of which tie following is a description, reference being had ,to the accompanying drawing, and to the letters and figures of reference marked thereon.

My invention relates to certain improvements in sewing machines of that type in which the threads are interlocked to form stitches above the fabric before the needle enters the same, and while applicable to any machine of this class, is especially ada ted for use in connection with a machine 0 the single interlock type, such as shown and described in an application for Letters Patent, filed by me on the'Sth day of A ril, 190], Serial No. 54,897. In this type 0 machine, the needle reciprocatcs continuously in the same vertical plane, and an oscillating loo or is employed to carry a separate thread in ront of, and very close to the needle, the descent of the latter causing the needle thread to bind over the looper thread and confine the same to the upper surface of the fabric.

It is found in practice, especially in machines making a very short stitch, that the loo or must travel very close to the needle, as t ere is absolutely no friction to throw out a loop from the looper, and the needle must as over the looper thread while the latter is in a substantially strai ht line.- The looper travels in a fixed circu a1 path and in assembling the machine, is so ad usted as to travel as close as possible to the front of a needle. When so adjusted, and a small sized needle of the ordinary type is emplo ed, the machine works satisfactoril an i will seldom or never miss a stitc 1.

' When, however, a large sized needle is employed for a different class of work or to ac.

commodate a larger thread, the phint of the needle is, owing to its reater diameter, re-

' moved to a-considerab e distance from the tween the needle point and looper, regardless of the size of needle em oyed, the machine being thus rendered ca able of adjustment to work of varying character, without than or of missing stitches. To this end. 1 mp oy a needle having itsffront side in a straight vertical line from shank to point,

the front to form a sharp point at the lower end, and such oint being in a plane with the frontor straig t side of the needle.

In the accompanying drawing: ligurc l is a perspective View of suflicient of the working arts of a sewing machine to illustrate the app ication of my invention; Figs. 2 is an elcvation on amen'larged scale, of the front side of the needle; Fig. 8 is a sectional clevat it 11 of the same, on the line 3-3, Fig. 2: Figs. 4 and 5, are respectively a rear and'a side elevation of the needle; and Fig. 6 is a sectional lan view of the needle on an exaggerated scafe.

Referring to the drawing, A represents the needle bar, B, the resser foot, S the work support, and M, a ooper carrying shaft to which is secured a curved looper L arranged to be moved in a curved path around the front of the needle and carry a thread a: for engagement with the needle thread 1 At the rear of the needle bar is a book 0, which is employed to catch the loo of the needle threa under the fabric, an draw it up to a point where it may be engaged by the loopel' forming an overedge stitch, the needle thread being interlocked by the looper thread above the fabric.

moves around in front of the needle, the thread is drawn somewhat taut, and, as there is no friction to throw out a loop, the needle must work werv close to the looper to engage the thread of the latter.

When the usual type of needle is used, the pointbeing in the center of the stock. the mint is necessarily remm cd from the loopcr for a distance equal to half the diameter of the needle, plus the nccessncv s mm between the side of the needlc and the iooper. In a heavy needle, the distance between the point and looper is so great as to render uncertain the formation of a perfect stitch, and I, therefore, propose to make the p'linz [1 one side of the center -of the stock, and so bring it nearer the looper.

The needle C has its front side 0 in a perthe rear side being curved or inclined toward Each movement of the needle binds the looper thread to the fabric, and as the looper feat}; straight rertical line from point to st and its rear side is c rved or inclined at the lower end, at 0', so at the point is formed in'aplane with the straight front face, bringing it close to l'oo er. In order to render a ver face 0 is "provided with a positivelylinsure the interlocking of the threads. l V

Needles of small, or of large diameter may be emplo ed, but in all cases, the flat side and 'o'int wfl be the same distance from the o0 er, and will not vary as would be the case wit needles having their pointsin the center of-the stock. A

Having thus described my invention, wliat wit- Letters Patent, is

A sewing machine, including in combination a work support, a needle, complements 'stitch-formin mechanism including a thread "#1 "claim. as new, and desire to secure by carrying irnp-ement, adapted -to carry its' thread across the upper surface of the work sufp ortin position nee 1e into the loop of thread on said im lem'ent, said needle havin its'point located in a line with the face of t e needle nearest the {with of movement of the thread -carrylv'vnf im 'ement, wherebysaid needle point '1 certaint pass between the ,said implement and t e thread carried thereby.. In testimony whereof I affi'x my signature, in presence of two witnesses.

. RUSSEL -G. WOODW1&RD. Witnesses: i v CHESTER MoNnIL,

Emu Kenn.

or the entrance ofthe

Images