US1798178A - Loom shuttle - Google Patents

Description

March 31, 1931. w. l. s'H PsoN 1,793,178

LOOM SHUTTLE Filed July 51, 1929 2 Sheets-Sheet 1 ATTORNEY March 31, 1931. w. STIMPSON 1,793,178

LOOM SHUTTLE Filed July 31, 1929 2 Sheets-Sheet 2 A TTORNEY Patented Mar. 31, 1931- UNITED srA'rs T E T FFicE WALLACE I. STIMPSON, 0F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO'IJRAPER COR- PORATION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE LOOM snuTrLn' Application filed July 31, 1929. Serial No. 382,509.

This invention relates to loom shuttles of the automatic weft replenishing type and is more particularly directed to the bobbin holding end of such shuttles.

t is now the ordinary. practice to provide automatic weft replenishing shuttles with bobbin holding jaws for detachable engagement with the head or rings of a filling carrier or bobbin and to associate withthe jaws a bobbin or filling carrier guide.

During replenishment the i'ncoming'filling carrier or bobbin serves to eject the filling carrier or bobbin previously in the shuttle, and during this operation the bobbin holding jaws and the associated parts thereof are subject to sudden and destructive strains which frequently result in breakage of parts.

It has likewise been common heretofore to form the bobbin holding jaws with a shank portion bent upon itself and to secure the shank portion to the shuttle body by a transverse bolt. 7

The wood of the shuttle is obviously somewhat yielding and when the bolt is set up. to

hold the shank and bobbin holding jaws in position, the shank portion is liable tobe distorted, so it has been suggested heretofore that the side walls of the shank portion be held apart by a spacer which sometimes consists of a block of metal or similar separate part.

In certain aspects the present invention is a further development and improvement over the construction shown and described in the Edward S. Stimpson Patent, No. 1,082,049, December 23, 1913.

When the bobbin holding jaws are separated by the incoming bobbin or filling carrier, the latter is liable to have its tip end portion depressed to such a degree as not to return to proper position in the shuttle, with the result that during the flight of the shuttle through the shed, warp threads are liable to be broken, and a further feature of the present invention consists in a construction of the bobbin holding jaws whereby the tipward ring on the head of the bobbin will be caused to first engage the end of the bobbin holding jaws and properly position the bobbin as it is transferred to the shuttle.

The invention and-novel features thereof will best be made clear from'the following description and the accompanying drawings of one good form thereof. 7

In the" drawings: 1

Fig. 1 is a perspective view of the bobbin holding jaws, and shank portion constructed in accordance with the present invention;

Fig. 2' is a perspective view of the bobbin guide and the features associated therewith for maintaining the side walls of the shank portion of the bobbin holding jaws from distortion; I

Fig. 3 is a perspective view of one end of the shuttle, showing the parts as being assembled; and 7 Fig.4 is a sectional side elevationof one end of theshuttle showing the relation of parts during the transfer of a bobbin to the shuttle. v

' Figs. 5 and 6 show a modification,

The shuttle comprises the body portion 1 having the usual bobbin chamber 2 and provided at one end with a shank receiving chamber S.' The chamber 3 isformed in the wood of the shuttle'and the upper portion is enlarged or widened, as at 4:, thereby forming a shelf or shoulder 5in the shuttle wood at the top of the shank receiving chamber, and at the bottom of the shank receiving chamber the shuttle is formed with a cut-out portion 6 of a size and character to receive the bottom plate of the bobbin guide, as will later appear.

he bobbin holder is characterized by the shank portion 7' which is bent upon itself, as at 8, and from the forward portion of the shank extend the bobbin jaws 9 and 10, each of which may be provided with the usual bobbin engaging grooves Y11 and bevelled upper portion 12 for the more ready entrance of the bobbin holding rings into the grooves of the bobbin holding jaws.

The wall of the shank portion 7 is provided with an opening 13 through which-is passed the transverse bolt 14, as usual, and between the bobbin holding jaws 9 and 10 is the bobbin guide 15, having a top plate 16.

and a bottom plate 17 which embrace bethe transverse bolt 14 and 17 is shown as provided with laterally extending wings adapted to enter the side walls of the shuttle.

As shown, a through-bolt 18 extends through a suitable opening in the top plate of the bobbin guide and through a similar opening in the bottom plate of the bobbin guide, and it is secured in place at its lower end by a nut 19, in which respect this feature of the invention may be substantially the same as that shown and ent of Wallace I. Stimpson and Harry Davis, No. 1,571,149, January 26, 1926.

As hereinbefore noted,.it is desirable to maintain the side the bobbin holder in their proper separated relation under the stress of the transverse bolt 14 and during shuttle replenishment. To this end the bobbinguide 15 has its top plate 16 provided with a downwardly eX- tending integral tongue 20 which may be conveniently formed of a size to maintain the side walls ofthe shank separated by punching out the'top plate, as indicated in Fig. 2, and bending the integral tongue 20 downwardly to occupy and fit the space between the side walls of the shank. Likewise,

the bottom plate 17 of the bobbin guide is provided with an integral tongue 21 which may be appropriately formed by punching the bottom plate, as indicated in Fig. 2, and bending. or turning the tongue upwardly.

The two tongues 20. and 21, it will be noted, converge towards each other and the bobbin guide 15, as indicated in Fig. 4, so that their end portions are in close proximity, and said tongues likewise occupy the space between the side walls of the shank 7, thereby bracing said walls both at their top and bottom portions, or substantially throughout the height of the shank. This is of importance because during the replenishing operation the top part of the bobbin holding jaws is first engaged by. the bobbin or filling carrier and is liable to efi'ect a twisting action or displacement of the side walls of the shank 7 which tendency is counteracted by the two integral tongues which act substantially throughout the height of the side walls of the shank.

Since one of the main purposes of the integral tongues 20 and 21 is to maintain the side walls of theshank in their proper, re lated positions, notwithstanding the stress of the changing stresses of transfer, it is preferable that the integral tongues 20 and 21 be formed upon the top and bottom plates respectively at a point substantially above and below the transversebolt 14, and, as shown inthe present instance of the invention, the bends of the tongues 20 and 21 are approximately above and below the transverse bolt, and their free ends are inclined convergingly into the space described'in the patshank 7.

walls of the shank 7 of between the side walls of the shank and towards the bobbin guide 15.

The bobbin holding jaws 9 and 10 con stit-ute novel feature of the invention, and, as will be noted from Figs. 1 and 4, the top edge portions 22 of each jaw are cut on a straight incline downwardly from the terminal portion 23 of the shank 7 and are then upwardly inclined. at 24 to the terminal end of each jaw, so that the a terminal end of each bobbin holding jaw, at 25, isat the same height as the top edge portion of the lVhere the straight inclines 22 and 24 meet, as indicated in Fig. 1, there is formed a yielding or spring zone 26 about ing transfer. v

When .a filling carrieror bobbin such .as indicated by dotted lines in Fig. 4 is trans fer'red to the shuttle, the forward ring on the bobbin head first engages at or near minal endportions of thebobbin holding jaws, and following t-his'the other rings of the bobbin head engage the jaws, so, that the bobbin takes substantially the position indicated by dotted lines in Fig. 4, with the top of the bobbin slightly elevated, thereby preventing depression of'the bobbin tip as it is transferredto the shuttle,

lVhen the oarts are in assembled Josition' as indicated in Fig. 4, the integral tongues 20 and 21 effectively maintain the walls of the shank-in their proper, separated relation, substantially throughout the height of said walls, and on transfer the integral tongues act to prevent distortion of the side walls of the shank due to any twisting or sudden impulse. Owing to the straightinclines 22 and 24 thes rin zone 26 'afiords sufficient yield-at an appropriate position frontjvard ofthe terminaliends of the shank and preferably midway between the terminal ends'of the shank and the terminal ends of the jaws'about which the jaws may yield as a filling carrier is transferred to the shuttle.

In Figs. 5 and 6 a modification of the invention shows the integral tongues extending downwardly from the top plateand upwardly from the bottom verging towards the transverse securing bolt. In such modification the tongue 30 extending downwardly from the top plate 16 has its terminal end portion 31 close to and above the securing bolt 14, while the tongue 32 extending upwardly from the bottom plate has the terminal end 33 thereof close to and below the securing bolt 14, with the result that in this modification of the invention the terminal ends of the tongues brace and support the side walls of the shank 7 at the point of greatest strain. As shown, the ter minal ends of the upper and lower surfaces of the securing bolt 14, but this may not always be necessary which the'bobbinholding jaws may'yield durthe ter-v platein a direction conthe two tongues contact with so long as the tongues formed integral with the top and bottom plates 16 and 17 respectively and bent downwardly and upwardly therefrom, brace and sustain the side walls of the shank substantially throughout the height thereof.

The constructions described afford a cheap and easily manufactured brace for the side walls of the shank substantially throughout the height thereof and obviate the disadvantages incident to a spacer block or similar element formed independent of the top and bottom plates of the bobbin guide.

What is claimed is:

An automatic weft-replenishing loom shuttle having, in combination, resilient bobbin-holding jaws formed with a -U-shaped shank portion, a retaining bolt extending horizontally through theshuttle body and shank portion of the jaws and the bobbin receiving portion of each jaw having itsfiupper edge inclined sufiiciently to cause-the ring nearest the tip of the incoming'bobbin to contact first with the jaws, a bobbin guide between the jaws having a top plate and bottom plate formed with supporting wings, and means for preventing thelbobbin-holding jaws from being sprung inwardly by the clamping action of the horizontallyextending bolt, comprising a tongue formed in tergral with the top plate and bent down wardly between the side walls of the shank to brace the upper portion thereof, a second tongue formed integral with the bottom plate and bent upwardly between the side walls of the shank towards the first tongue to brace the lower portion thereof, and the tongues being disposed in spaced relation to said bolt to hold the jaws in spaced parallel relation to each other and at the same time so that they are free to spring to receive the incoming bobbin.

In testimony whereof, I have signed vmy name to this specificatlon.

WALLACE I. STIMPSON.

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