US584821A - William john - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

W. J. MAOKENZIE.

HEMSTITGH ATTACHMENT FOR SEWING MACHINES.

No. 584,821. Patented June 22, 1897.

(No Model.) 2 Sheets-Sheet. 2.

W. J. MACKENZIE. HEMSTITOH ATTAGHMBNT FOR SEWING MAGHINES.

No. 584,821. Patented June 22, 1897.

ihyirn STATES i ATENT FFICE.

HEMSTITCH ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 584,821, dated June 22, 1897.

Application filed January 22, 1897. erial No. 620,211. (No model.)

To all whom it may concern..-

Be it known that I, IVILLIAM JOHN MAO- KENZIE, linen merchant and manufacturer, a subject of the Queen of Great Britain, and a resident of WVaringstown, county Down, Ireland, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

This invention relates to machines for doin g open-work hemstitchin g on handkerchiefs and other articles.

The object of the invention is to provide a simple attachment of improved construction which can be fitted on a Wheeler do WVilson or other well-known style of sewing-machine, whereby the threads of the fabric can be opened out between the stitches, so as to produce open-work hemstitching.

\Vith this invention it is not necessary, as usual, before commencing the hemstitching to pull a number of threads out of the fabric, and in order that my said invention may be properly understood I have hereunto appended two explanatory sheets of drawings, whereon Figure 1 is a side elevation of a WVheeler & WVilson machine with the head thereof shown in section. Figs. 2, 3, and 4 are detail views. Fig. 5 is a view of the inside of the face-plate. Figs. 6 and 7 are detail views.

I11 carrying out my invention I clamp to the ordinary.laterally-movable needle'bar CL of, say, a W'heeler & l/Vilson hemstitching-machine a stud b, which projects into a hole a, made in a spreadenbar c, which latter is preferably of square section. This bar,which has a spreader or reliever needle cl adj ustaby secured to its lower end by means of a collar d and pinching-screw (P, is capable of sliding up and down in a guide-block e, secured, by means of screws f, to the face-plate g of the machine. The guide-block a has a coverplate esecured to it by screws e*, as shown clearly at Fig. 5, and a slot 6 is cut in this plate, as shown at Figs. 1 and 5, to guide and limit the movement of the stud b as it rises and falls with the needle-bar a.

h is the usual needle, i the usual connecting-rod,j the usual quadrant, and 7c the usual driving-wheel, of the machine.

It will be seen that the lower end Z of the spreader-needle d is thickened and tapered,

so as to form a sort of spear-point which makes a wide hole in the cloth.

Fig. 2 is a side view of the spreader-bar c. Fig. 3 is a front view showing the bar 0 fitted in the guide-block e, from which the coverplate e has been removed. Fig. 4. is a side view of the bar 0 and its guide-block c. "Fig. 6 shows the needle h and spreader-needle d closed, and Fig. 7 shows the needle 72- and spreader-needle (I opened or moved apart from one another. The needle 71 moves away from the spreader-needle d when they are both up out of the cloth.

With this invention each time the needlebar a rises up out of the cloth the spreaderbar a is raised up with it by means of the stud b on the bar a, and likewise each time the needle-bar a moves down to penetrate the cloth the bar 0 also moves with it. As the spreader-needle d is longer than the needle h, it follows that it first penetrates the cloth and, owing to the spear-head Z, presses back or opens out the threads to such an extent as to produce an open-work stitch. WVhen the bar a is moved laterally by means of the quadrantj and connecting-rod 2', the bar a does not move with it, but remains in its place, the stud b merely moving in the hole 0 in the bar 0.

The head Z, which is straight at one side and tapered at the other, as clearly shown at Figs. 6 and 7, tends .to throw the threads toward the hem when piercing the cloth.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is- U 1. The combination in a sewing-machine, of the head, a reciprocating needle-bar working in the head, a guide fitted in the head, a spreader-bar fitted in the guide and operated from the reciprocating needle bar and a spreader-needle fitted to the bar, and having an enlarged end Z tapered on the side toward the needle and straight on its opposite side, whereby it will push the threads toward the hem when piercing the cloth, substantially as set-forth.

2. The combination in asewing-machine, of the head the reciprocating needle-bar working in the head, the face-plate fitted to the head, aguide esecured to the face-plate, a slotted cover a secured to the guide, a spreaderbar 0 Working in the guide and operated from the guide, and a needle-bar outside of said the needle-bar and a spreader-needle l secured guide from Which said operating-pin projects. to

to the bar 0, substantially as set forth. Signed at Glasgow, county of Lanark, Scot- 3. The combinationin ZLSG\ViHg-H1&Chil16,0f land, this 18th day of December, A. D. 1896. 5 the head, at guide secured in the head and WVILLIAM J OIIN MACKENZIE.

having a slotted cover or side 6' secured to it, Witnesses: 2t spreader-bar movable in said guide, an op- HUGH D. FITZPATRIOK,

erating-pin therefor traveling in the slot of YVILLIAM GALL.

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