US1731046A - Tension-plate-adjusting screw for shuttles - Google Patents

Description

w. L. HALL 1,731,046

wnusxon PLATE ADJUSTING scrmw FOR szww'rnss Oct. 8, 1929.

Filed Jan. 10, 1928 mmwmmm m .QJ \Q INVENTOR.

Patented Oct. 8, 1929 UNITED STATES PATENT, OFFICE WASHINGTON L. HALL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JAMES H. BILLINGTON COMPANY, OF PHILADELIPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA TENSION-PLATE-ADJUSTING SCREW FORSHUTTLES Application filed January 10, 1928. Serial No. 245,652

My invention relates to a new and useful adjustable tension plate screw adapted for regulating the tension of the plate or other thread tcnsioning device in shuttles and the like, said adjustable screw being of a novel construction, which prevents .its working loose or dropping out, thus insuring permanency and certainty of adjustment at all times.

It has been the practice heretofore to provide shuttles having thread tensioning means with an adjustment screw of conventional construction which engages a threaded opening near the terminal basal portion of the shuttle. These adjustment screws of the conventional type eventually wore loose through constant adjustn'ient and use and ultimately stripped the wood or were liable to project beyond the bottom of the shuttle thus cutting and otherwise dan'iaging the fabric being woven. Furthermore, a screw of this character frequently dropped out completely and was lost, thus suddenly and completely relieving all tension on the thread fed from the bobbin which resulted in an entanglement oi the thread or in loose, defective weave.

It is the object of my invention to overcome these disadvantages and to provice an adjustment screw which will not be liable to wear loose and drop out of place or project beyond the bottom of the shuttle, and one which at the same time is capable of being easily and accurately adjusted from the o1:- terior of the shuttle to regulate the thread tensioning means or tension plate to any de sired extent.

To the above ends, my invention consists in providing a novel adjustment screw of the character described which is preferably made of metal, said screw being provided with an upper annular flange adapted to seat on an inner annular seat or counterbore in the shuttle body, and being provided with a bottom slot or groove adapted to receive the end of a screw driver or the like inserted through the lower end of an aligning opening in the bottom of said shuttle body, whereby said screw may be revolved to regulate the position of the tension plate.

My invention further consists in the various novel features of construction and advantage hereinafter described and claimed.

For the purpose of illustrating my invention I have shown in the accompanying sketches a form thereof which is at present preferred by me since it will give in practice, satisfactory and reliable results although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described. I

In the accompanying drawings,

Fig. 1 represents a top plan View of a shuttle embodying my invention.

Fig. 2 represents a section, on an enlarged scale, taken on line 2-2 of Fig. 1.

Fig. 3 represents a transverse section on line 3-3 of Fig. 2. c

Fig. t represents a perspective view of my novel tension plate adjustment screw, shown in detached position.

Fig. 5 represents section on line 55 of Fig. 4:.

Referring to the drawings, in which like reference characters indicate like parts, 1 designates a shuttle of any conventional construction comprising the body 2 in which is positioned the bobbin 8 carrying the thread 41-. 5 designates a guard member pivotally secured at its rear end to the body 2 and having its front end detachably engaged by the 1novable hook 6. The thread l passes through the guide 7 and between the tension plate 8 and the stationary roller 11 and out through the eyelet 12, the tension plate 8 being pivoted at 9 and constantly urged upwardly against the roller llbythespringlO. Ascrew13havingthelower threaded portion 1 1 and the upper annular flange 15 and provided with the lower transverse slot 16 and the upper counter-bore 17 below which is the chamber 21, is positioned in the internally threaded opening 18 in the bottom of the shuttle 1. The spring 10 has its lower end seated in the recess 17 in the top of the screw 13 and its upper end bears against the tension plate 8 as will be understood from Figs. 2 and 3.

When it is desired to adjust the tension oi the plate 8, a screw driver or similar imple ment is inserted through the lower end of the opening 18 to engage the slot 16, whereby the screw 18 may be revolved in either direction to increase or decrease the tension on the ten sion plate as may be desired.

The adjustment screw 13 is thus entirely enclosed and completely protected from outside influences and its tendency to work loose is greatly reduced. Furthermore, by the engagement of the flange 15 with the seat 20, the screw 13 is positively prevented from dropping out of place and getting lost and from projecting beyond the bottom of the shuttle to cut or otherwise damage the warp of the tabric, in the event that the threads on said screw 13 or said opening 18 should wear out and become ineii'ective. Due to the fact that it is impossible to displace the screw 13 from the opening 18, a certain minimum pressure is always exerted on the finger or tension plate 8 and the thread a is at all times drawn surliciently taut to prevent the entanglement or loose weaving thereof.

1 am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodimentto be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a device of the character stated, the combination in a shuttle of a tension plate, a spring of small height bearing against the bottom thereof, a shallow threaded opening directly in said shuttle aligning with said spring, a recessed seat in the top of said open-v ing, at least a portion of said spring being accommodated in said seat, an adjustable tension screw of small height positioned in said opening and provided with an upper annular flange which flange is accommodated in said recessed seat, said screw having a lower slot therein for enabling said screw to be adjusted from the exterior of said shuttle the combined height of said spring and screw approximating the height of said shallow open- 111g.

2. In adevice of the character stated, the combination in a shuttle of a tension plate, a spring of small height bearing against the bottom thereof, a' transverse roller in proximity to and above said tension plate, there being a. threaded opening of small height directly in the shuttle aligning with said spring, a counterbore in the upper portion of said opening at least a part of said spring being accommodated in said counterbore, an adj ustable tension screw of small height adapted to memes engage said threaded opening and provided with an upper annular flange adapted to engage said counterbore, and a lower slot in said screw for enabling said screw to be adjusted from the exterior of said shuttle, the upper portion oi said screw being provided with a recessed counterbore adapted to receive the lower end of said spring the combined height 01": said spring and screw approximating the height of said shallow opening.

l VASHINGTON L. HALL.

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