US1107873A - Needle-threading device for sewing-machines. - Google Patents

Description

A. ANZELEWITZ. NEEDLE THREADING DEVICE FOR SEWING MACHINES.

APPLIOATION FILED mm: as, 1913.

1, 1 07,873, Patented Aug. 18, 1914.

M QHM'BL Witnesses: 2

wuw gw y MIEs PATENTQFFICE- iiiaitanAivi nivannnwrrz, or anrwnnr, BELGIUM.

\ NEEDLE-THREADING DEVICE FORSEW'ING-MACI'HNES."

Specification of Letters Patent.

Patented An". 18, 1914.

Application filed .Tune 13, 1913. Serial No. 778,459.

1/ b all whom it may concern:

Be it known that I, ABRAHAM .Anznnn wrrz, a citizen of the United States of America, residing at 59 Rue St. Vincent, Antwerp, in the Kingdom of Belgium, have invented certain new and useful Improvements in Needle'lhreading Devices for Sewing-Machines, of which the following is a specification.

This invention relates to devices for threading the needles of sewing machines of the kind in which a small hook carried by a movable arm secured to the presser-foot bar of the machine is adapted to be passed through the eye of the needle when the latter is stopped at a predetermined height to receive the thread and draw the latter through the eye on being-withdrawn.

The main object of the present invention is to provide a device of the above kind consisting of fewer parts than similar devices and being thus cheaper to manufacture and easier to operate. This object is attained mainly by so constructing the movable arm carrying the hook that it can be shifted under the needle bar not only when the latter is in the required position to make the threader operative but also when it happens to be a little too low as frequently occurs by reason of the difficulty of stopping it exactly at a predetermined point of its stroke.

A further object of the invention is to so construct the socket by means of which the movable arm is secured to the presser-bar that the said socket may be fastened to a presser-foot of square or polygonal cross-sec:

tion as well as to one of circular cross-section. This further object is accomplished by providing the inner wall of the socket with vertical angular equidistant grooves.

The accompanying drawing shows a preferred form of the device.

Figure 1 is a side view, Fig. 2 a front view, and Fig. 3 a plan view of the device whereas Fig. 4: is a perspective view showing the same secured to the resser-foot bar of a sewing machine with the hook shifted through the needle hole.

In the said figures a is the hook carried by a bent arm 7) provided with a socket c for securing the device to the bar f of a presser foot g. The hook (I, is fastened in a slot of a small block (Z having two projecting wings 9' adapted to embrace the needle for the purpose of guiding and protecting thehook.

The said block (Z is secured to the lower end of the arm I) by a screw e passed through a vertical slot in the arm 5 for the purpose of adjusting the height of the block (Z and j The upper horizontal portion of the hooka. arm Z) is made of two parts n,0, capable of sliding on each other, oneof which n is made with a slot at through which is passed a screw Z screwed into the other part 0 in order that the length of the upper horizontal portion of the arm may be adjusted. The front edge of the parts a, 0 is beveled or rounded so that, when the arm b is shifted for threading the needle, if the needle bar 1' v is somewhat beneath the required height, the same will be lifted up by the beveled edge of the parts 71-, 0 and will not prevent the arm 6 from passing under the needle bar for holding the latter in the required position.

Four vertical angular grooves 7) are formed at equal distances from one another in the inner wall of the socket c for the purpose of allowing the latter to be fastened equally well upon square or round presserfoot bars.

hat I claim and desire to secure by Letters Patent of the United States is 1. A hook-device for threading needles in sewing machines comprising in combination with. the presser-foot bar and needle bar of the machine, a book, a bent support for said hook rotatably mounted upon said presser rotatably mounted upon said resser-foot bar In testimony whereof I affix my signature and e bent arm depending from sand socket 1n presence of two Witnesses.

and hevin an extensible horizontal ortion W with a bei eled edge adapted to engage and I ABRAHAM ANZELEXUIIAT 5 raise the needle-bar and a vertical portion on Vitnesses: v i

which said block can be adjnstably fixed in ADOLPHE VOGEL,

position. 7 I v CHAS. ROY NASMIDH.

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

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