US2010889A - Textile apparatus - Google Patents

Description

Aug.' 13,1935. w, POOL ETAL 2,010,889

TEXTILE APPARATUS Firled Jan. 28, 1952 FlGl uwzfghlr 14 zu Z1.- 12.

threads.

Patented Aug. 13, 1935 ffr''isNr omer.

l l ,ammessa TEXTILE APPARATUS william Pesi near Derby, England, assignors and VLeonard. `lhatham, Spenden,

to Celanese Corporation of America, arcorporation of Delaware Application january vZ8, 1932,`-Serial-No. 589,426

f VIn Great Britain March 19, 1931 3 claims. `(ci. 1319;;125)

. This inventionrelates to looms andis particularly concerned with shuttleless looms ofthe type wherein a dummy shuttle is employed to carry a pre-formed loop through the shed of the'warp It is an object of this invention to provide an improved form of dummy shuttle for use in looms of this type. Y Y

The dummy shuttle employed for this purpose normally comprises a solid body having `usually the general shape of an ordinary shuttle, and carrying two horns which point in opposite directions lengthwise of the shuttle, and are adapted to catch the weft loop at the side of the loom and enable the shuttle to carry it through the` shed. With such shuttles, there is a tendency, particularly when artificial and other springy yarns` are being used, for the weft to jump'out oi engagement with the horns, with theresult that itis not laid properly in the shed. It is a particular object of the invention to devise a shuttle in which this disadvantage is avoided.

According to the invention, in a dummy shuttle for use in shuttleless looms the space between a weft engaging horn and the body of the shuttle is formed with a constriction which readily permits the passage of a weft loop 'during its engagement by the horn, but prevents the loop from springing out after its engagement.

Thus, a spring or tooth may be formed either on the horn or the shuttle body or on both so as partially to close the passage between the horn and the shuttle against the return of the loop, while allowing the loop to pass it smoothly and without hindrance as the horn enters the loop. Such a projection is arranged to present an angle to the weft, in which the weft is caught if it attempts to pass out of engagement with the horn. Thus, there may be provided on the body of the shuttle or on the horn a projection which causes the passage oiered to the weft to converge towardsthe base of the horn, and which, beyond the narrowest point of the passage, falls away sharply. The projection may constrict the passage or the weit loop against its return by arranging that the projection enters a groove while leaving a space for the weft topass during its engagement by the horn. ThisY groove is formed in the shuttle body when the projection is formed on the horn, and on the horn when the projection is on the shuttle body.

The invention will now be described in greater detail with reference to the accompanying drawing, but it is to be understood that this description is given by way of illustration only and is in no way limitative.

-Figure 1 is a side elevation in part section and Figure 2 a plan of a dummy shuttle according to the invention. f I I Figures 3, 4,5 and 6 are sections across the lines 3-.-:3, .cl- 4, 5 5, and 6-5 respectively on Figure f2.

u Figures 7 and 8 are a side elevation and vplan respectively of a portion of a further form of dummyshuttle according to the invention.

Figure 9 is a. side elevation in part section of a portion of a furtherorm of dummy shuttle ac` cording `to the invention. Y Referring to Figures l to 6, the dummy shuttle illustrated comprises a wooden body II having steel tips l2: and provided with a broad groove i3 along the upper side of the body II. I Two 1horns I4 are attached at their bases I5 by means of screws i6 to the top of the shuttle. The horns I4 curve round from their bases l5 to the side I1 of the shuttle away from the reed as the shuttle passes through the shed, the horns I4 being bent round to lie ilush with theside I1 and then passing along .the length ofthe shuttle in the groove I3. Oblique slots I8 are thus formed between the shuttle and the horn on the side of the shuttle away from the reed, the slots I8 sloping downwardly towards the mid-point of the shuttle and communicating at their lower ends through a space I9 with the under side of the shuttle and at their upper ends with the groove I3 on the top of the shuttle at points near the Shanks of the horns dummy shuttle and passes under the tip of the horn I4 by means of which one limb of the loop which is held at the selvedge is conducted down the groove i8 tothe bottom of the shuttle, the free end of weft coming out through the space I9 between the curve of the horn and the body of the shuttle and running back along the groove 24 in the middle portion of the shuttle body. The

under side of the shuttle is channelled as indicated at 2) to allow the free passage of the weft beneath the shuttle and to permit it to be pulled taut from the selvedge, so that the proper tension is applied to the weft and a good selvedge is formed. This feature is especially advantageous in the weaving of smooth and slippery yarns, such as artificial silk yarns, to which, on account of their smoothness, it is difcult to impart the correct tension.

In order to prevent the weft thread from coming out of its engagement under the horn I4, a. tooth 2 I is provided beneath the tip of each shuttle horn, which tooth restricts the passage between the tip of the horn I4 and the bottom of the groove I4. The weft loop is presented to the.

I3, and prevents the weft, once engaged, from returning. If desired, the tooth 2l may be inserted on the shuttle body beneath the tip of the horn, instead of being disposed on the underside of the horn itself.

For the purpose of preventing the free end of the weft loop from riding up the edge of the groove I3 in the top of the shuttle and falling between the shuttle and the reed, the side of the groove nearest the reed may be undercut so as to present an overhanging edge 26. If any springiness of the weft thread causes it to be pressed against the side 25 of the groove I3, it cannot ride up the side of the groove and over the edge of the shuttle on account of the overhanging edge 26. Thus the danger of disturbing the path of the shuttle by the engagement of the free end or" the weft between the shuttle and the reed and the possibility of damaging the weft or warp threads thereby is eliminated. The overhanging edge above referred to is particularly clearlyV seen in Figures 3 to 6. Y

Crevices in the shuttle body are avoided and all projections are carefully rounded off so that if the shuttle should turn in the shed, there is no danger' of its catching the warps. For the same reason, the Shanks of the horns I4 are caused to lie flush with the side Il' of the shuttle, while the tips of the horns lie wholly within the groove I3.

In Figures '7 and 8 a tooth 28 is provided on the base I5 of the horn and projects into a hole 29 on the shank of the horn opposite the base, soI that the passage through which the weft is conducted is completely closed. The free end of the weft thread passes up from the bottom of the shuttle through the space I9, and it will be seen that in passing the tooth 28, the thread is kinked or distorted into the hole 29, the space IS oering no way for the thread to spring out.

In Figure 9 a tooth 2i is provided under the tip of the horn I4 as in Figures 1 to 6, but in this case a recess is provided into which the tooth 2| projects so that here also the shape of passage between the tooth 2I and the recess 30 is such as to necessitate the kinking of the thread as the thread passes in, and will not permit it to pass out again.

What We claim and desire to secure by Letters Patent isz- 1. A dummy shuttle for use in shuttleless looms comprising in combination a body member and a horn member attached thereto and adapted to engage a pre-formed loop of weft, the passage between said members being narrowed over part of its length to form a constriction which widens rapidly towards the point of attachment of the horn member to the body member and less rapidly in the opposite direction, said constriction readily permitting the passage of the weft loop during its engagement by the horn, but preventing such loop from springing out after engagement.

2. A dummy shuttle for use in shuttleless looms comprising in combination a body member and a horn member attached thereto and adapted to engage a pre-formed loop or weft, the passage between said members being tortuous and narrowed over part of its length so as to form a constriction which readily permits the free passage of the weft loop during its engagement by the horn, but prevents such loop from springing out after engagement.

3. A dummy shuttle for use in shuttleless looms comprising in combination a body member and a horn member attached thereto and adapted to engage a pre-formed loop of weft, a projection being provided on one of said members which enters a recess in the other member, the passage so formed between said members being tortuous and narrowed over part of its length so as to form a constriction which readily permits the free passage of the weft loop during its engagement by the horn, but prevents such loop from springing out after engagement.

WILLIAM POOL. LEONARD LATI-IAM.

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