US680014A - Blind-stitch sewing-machine. - Google Patents

Description

No. 680,0!4. Patented Aug. 6, I901. J sses BLINDSTITGH SEWING MACHINE.

(Lpphcafion Med Apr 29, 1899) (No Model.)

c n E m m 4 m 5 iv J now m 6 e J J 4W m UNITED STATES PATENT OFFICE.

JOSEPH ARBES, on NEW YORK, N. Y.

BLIND-STITCH SEWING -MACHINE.

SPECIFICATION forming part of Letters Patent No. 680,014, dated August 6, 1901.

Application filed April 29, 1899. Serial No. 115,012. (No model.)

To all whom it may concern:

, Be it known that I, JOSEPH ARBES, a citizen of the United States, residing at New York, in the county and State of New York, have invented certain new and useful Improvements in Blind-Stitch Sewing-Machines,of which the following is a specification.

My invention relates to certain improvements in sewing-machines which are particularly applicable to the style of sewing-machine covered by my Patent No.595,090,dated December 7, 1897. This machine was particularly designed for effecting what is commonly known as blindstitching, the cloth being fed around the end of the cloth-plate supported adjacent to the path of the needle, which is arranged to sew through a transverse bend or fold in the material. .Cooperating with the needle is an oscillatory or rotary shuttle of usual construction. In practically introducing my sewing-machine I encountered some difficulty with the operation of the needle in sewing through heavy layers of goods, such as thick seams, the needle tending to bend slightly out of its proper path, so as to sometimes interfere with the shuttle, and at other times be moved too far away from the shuttle to allow the shuttle to loop the needle-thread. My present invention is designed to obviate this difficulty, and to this end I provide a sewing-machine needle with a straight face or side extending approximately to the point and formed with a threadgroove, the straight grooved face of the needle being designed to be presented toward and operate in conjunction with the edge of the cloth-plate and allowing the cloth-plate to be adjusted very much closer tothe needle than would be possible with the tapered needle of ordinary construction. With the improved needle there is also less liability of the cloth and feed plate forcingthe needle out of its proper path. In combination with the improved needle I employ a tubular needleguide preferably tapered slightly toward the path of the shuttle, so as to further insure the operation of the needle in its proper path.

In order that my invention may be fully understood, I will first describe the same with reference to the accompanying drawings and afterward point out the novelty with more particularity in the annexed claims.

In said drawings, Figure 1 is a detail elevation of parts of the sewing-machine, showing my improvements applied thereto. Fig. 2 is a detail side elevation of the shuttle-case, having my improved tubular needle-guide mounted thereon. Fig. 3 is a vertical sectional view of the shuttle-casing, representing the shuttle, the needle-guide, and needle. Fig. 4 is an enlarged longitudinal sectional view of the improved needle. Figs. 5 and 6 are detail sectional views taken on the lines 5 5 and 6 6, respectively, of Fig. 4.

I have shown my improvements applied to the machine illustrated and described in the above-named Patent No. 595,090, and reference is made to said patent for a fuller description of the parts which are shown but not fully described herein.

1 is a part of a sewing-machine table. 2 is a feed-plate adjustably mounted upon a supporting-arm 3 and also adjustable toward and away from the sewing-machine table 1 to bring the forward edge 2 of the feed-plate nearer to or farther from the path of the needle. 4 and 5 are suitably-operated feed-rolls, and 6 is the ordinary presser-foot. 7 is the shuttle-casing, and 8 is the shuttle, mounted in the casing and operated in any suitable manner. These parts are the same as similar parts in the above-named patent.

10 is my improved sewing-machine needle, which is formed with the usual eye 10 and a straight face or side 10", extending to the point, in which straight face is a longitudinal groove 10, extending nearly the entire length of the needle. In the opposite tapered face of the needle is formed a short longitudinal groove 10.

15 represents the material supported on the feed-plate 2, passing around the edge 2 of the feed-plate and between the feed- rollers 4 and 5. The material 15, which is folded around the feed plate or guide 2, is held closely against the plate or guide by the presser-foot 6 and feed-rolls at 5, as clearly illustrated and set forth in my Patent No. 595,090. The needle 10 is designed to be secured in the needle-bar, of ordinary constructhe shuttle-casing directly beneath the nee dle. As illustrated in the drawings, I have formed the needle-guide'by boring a block 16 with a tapered opening 17, said tapered opening 17 forming the guide. The block 16 is secured to the under face of a plate 18, and the plate 18 is rigidly mounted upon the inclined upper face of the sh uttle-casing.- The block 16 is cut out at 16 in the path of, the needle. It will be observed that the tapered tubular guide 17 is arranged vertically within the path of the needle, so that any tendency of the needle to move out'of its proper path will be overcome by the engagement of the needle with the guide.

The operation of the device will be clear from the above. The needle passes through the transverse fold of the material which passes around and is held against the forward edge 2 of the feed-plate and down into the tapered tubular guide-opening 17, the guide confining the needle within proper relation to the shuttle 8. The thread leading from the spool through the needle-puncture in the material rests in the long longitudinal groove in the straight face of the needle, and

' when the needle reaches its lowest position the portion of the thread upon the opposite side of the needle leading from the material rests in the short groove in the tapered face of the needle. As the needle starts .to move up and is withdrawn through the material the portion of the needle-thread in the short groove will-be formed into a loop in the path of the shuttle and the shuttle catches the loop and forms the'stitch'as in the ordinary shuttle mechanism. f The needle-guide at the straight sideof the needle in addition to its function of properly centering the needle tends to confinethe thread in the groove on that side of the needle, and thereby insures the formation of a loop in the path'of the needle of ample size for the shuttle to catch.

Having thus described my invention,what I claim as new therein, and desire to secure by Letters Patent, is- I 1. In a sewing-machine, the combination of a feed-plate and means for feeding material thereover, a needle and operating mechanism, a shuttle and operating mechanism, and a tapered tubular needle-guide supported in the path of the needle between the feed-plate and shuttle and adapted to confine the needle in working relation to the shuttlevduring op eration, substantially as set forth.

2. In a sewing-machine, the combination of a feed-plate projecting toward the path of the needle, means for feeding material over the feed-plate, a needle formed with a straight face presented toward the feed-plate and a point substantially in line with its straight face, needle-operating mechanism, a shuttlecasing mounted beneath the feed-plate, a shuttle within the casing, means for operating the shuttle, and a guide in the path of the needle between the feed-plate and shuttle, adapted to confine the needle during operation in working relation to the shuttle, substantially as set forth. JOSEPH ARBES.

Witnesses:

WM. E. KNIGHT, M. V. BIDGOOD.

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