US1909993A - Lug strap and method of making the same - Google Patents

Lug strap and method of making the same Download PDF

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Publication number
US1909993A
US1909993A US402848A US40284829A US1909993A US 1909993 A US1909993 A US 1909993A US 402848 A US402848 A US 402848A US 40284829 A US40284829 A US 40284829A US 1909993 A US1909993 A US 1909993A
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Prior art keywords
lug strap
strap
roll
lug
glue
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Expired - Lifetime
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US402848A
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Herbert E Wilson
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Herbert E Wilson
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24Mechanisms for inserting shuttle in shed
    • D03D49/26Picking mechanisms, e.g. for propelling gripper shuttles or dummy shuttles
    • D03D49/38Picking sticks; Arresting means therefor

Description

y 1933- H. E. wiLsoN 1309,993
LUG STRAP AND METHOD OF MAKING THE SAME Filed Oct. 28, 1929 3Sheets-Sheet l Fig 1.
erber? Ea" E s U m May .23, E w soN I LUG STRAP AND METHOD OF MAKING THE SAME Filed Oct. 28, 1929 3 Sheets-Sheet 2 Fig. 5.
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May 23, 1933. H. E. WILSON LUG STRAP AND METHOD OF MAKING THE SAME Filed Oct. 28, 1929 3 Sheets-Sheet 3 -lnvenTor. HerberT E.Wilson ATTys.
Patented May 23, 1933 UNITED STATES HERBERT n. WILSON, or ANTRIM, NEW HAMPsHmn LUG STRAP AND METHOD OF MAKING THE SAME Application filed October 28, 1929. Serial No. 402,848.
This invention relates to lug straps for looms and it, has for one of its objects to provide a novel method of making a lug strap by which an article twithi superior wear qualities may be produced and an-.
other object of the invention is to provide a novel lug strap having such superior wear qualities.
Lug straps are and one way commonly employed in making lug straps of this material is to apply glue or some adhesive to a piece ofduck, canvas or other material and then roll this glued piece into the form of a roll. The roll is then put in a press and subjected to heavy pressure to compact the various plies and to so shape the roll that it has a crosssectional shape such as desired for the completed lug strap. The article is then taken from the press and laid on a drying rack until the glue is partially dry. It is then removed from the drying rack and I bent into the U shape necessary for the lug strap and such U shape being preserved until the glue becomes thoroughly dry by placing the lug strap in suitable forms. 7
The bending of the roll into the U shape after the glue has partially set is detrimental because it is apt to reduce the adhesive properties of the glue. Most kinds of glue will assume a more or less crumbly nature if disturbed when it is partially set and if glue of this nature is used in the making of a fabric lug strap the bending of the roll into the U form will tend to cause the glue to crumble so that it loses much of its efficiency in binding the layers of cloth together and as a result the lug strap is weakened at the bend, which is the point where it should be of maximum strength. A I
In carrying out my invention I propose to roll the glue saturated cloth up into the form of a roll and while the glue is still warm and before it has cooled I place the roll in a press adapted to mold or shape the roll into the form of a lug strap. I The: press is designed to apply heavy pressure to the article and this pressure is maintained'until the glue has become cool and has firmly set.
Since all of the molding operation is acfrequently made of fabric portion of the mold;
complished while the glue is warm and before it has begun to'set this operation is carried out'without in any way detracting fromthe adhesive properties of the glue. The result is that a lug strap made according to my improved method will have its maximum str'engththroughout and thus will have an increased length of life, this being due to a considerable extentto the fact that the lug strap is given its permanent shape 69 before it is taken from'the pressand there is no disturbing of the glue after it begins to set. i g
In making my lug strap I'may, if de sired, place a reinforcing piece of metal in the center of the roll and make the lug strap With an additional layer or layers of'cloth around the bend thereof thereby importing into the lug strap additional strength .at the points where it is most needed.
In order to'give an understanding of the I invention I have illustrated in' thedrawings some selected embodiments thereof and'some of the steps of the method by which it may be made. I v
Fig. 1 is a perspective view illustrating" the operation of rolling up layers of canvas or cloth into the form of a roll from which the lug strap may be made; V
Fig. 2 is a perspective view of'the roll completed; 7 V
Fig. 3 is a perspective view of a leatherreinforcing member which is put in the bend of the lug strap to receivethe wear of the picker stick; a
Fig. 4 is a more or less diagrammatic view" illustrating the press in'open position and showing the unmolded lug-strap therein,the top and bottom plates of the press being 7 omitted from said view;
Fig. 5 shows the press closed withthe'lug strap molded therein, the top and bottom plates of the press being omitted for the sake of clearness;
Fig. 6 is a perspective view of thecomplete lug strap;
Fig. 7 is a section on the line 77, Fig. 6;
Fig. 8- is a section on the line 8+8,- I ,ig. 6;
Fig. 9 is a fragmentaryview of the core Fig. 10 is a view through the mold taken on the line 1010, Fig. 5;
Fig. 11 is a view similar to Fig. 1 but illustrating the formation of a reinforcedlug strap;
Fig. 12 is a view similar to Fig. 5 illustrating the press adapted to make the reinforced lug strap, said press being shown in closed position with the lug strap therein;
Fig. 13 is a perspective view showing the reinforced lug strap; 7
Fig. 14 is a section on the line'14.-14, Fig. 13'
This lug strap is of the usual U shape, it 7 having the two arms 2 connected by the bridge portion 3, the arms being provided with the usual slots 4:. The bendof the lug strap which receives wear from the picker stick is faced with a leather facing 5 and preferably the bridge portion 3 will be formed with a slight convex surface on its inner face as shown at 6.
The lug strap is made from a roll 7 of fabric, such as canvas or. duck, the roll being made by rolling up one or more sheets of glue-soaked fabric. As shown in Fig. 1 the roll is made from two sheets 8 and 9 of some suitable fabric, each of which is coated with glue as shown at 10 These sheets are placed one on the other and then are rolled up from one edge as shown at 1 thereby to produce the roll 7 The glue or adhesive 10 which isused will preferably be of the kind which will be liquid. when hot but will begin to set as it starts to cool.
The glue or adhesive 10 is applied while hot to the fabric sheets 8 and 9 and they are then immediately rolled up into the roll form shown in Fig. 2. As soon as the roll is formed it is placed in a press which molds it to the shape ofthe lug strap desired and at the same time places it under heavy compression, the pressure being maintained until the glue has set.
WVhile. any suitable press suitable for carrying out this work may be employed I have, for the purpose of this application, illustrated a press comprising a core member 11 about which theroll 7 is bent and movable press members 12, 13," 14 which co-operate with the core member 11 to give the roll its lug strap shape. The member '12 is provided with a pressing face 15 which corresponds in shape to the exterior face of the bridge 3." The press members 13 and let-are shown as hinged to. the member 12 at 16 and are adapted to foldtoward the core member 11. 1 7 l Fig. 4: shows the press open and in position to receive the roll 7L At the time the roll is put in the press there will be added the leather facing piece 17 which forms the leather facing 5 of the lug strap. This piece 17 is shown as having chamfered ends 18 and as placed in the press between the members 11 and 12. With the roll 7 and lining member 17 in position shown in Fig. 4.- the press will be closed, and during such operation the members 11 and 12 are moved toward each other and the wing members 13 and 14 are closed up toward the core member 11 as shown in Fig. 5.
This operation molds the roll 7 and facing piece '17 into the shape of the lug strap! asshown in Fig. 5. .Th'is molding ofthe lug strap is accomplished while the glue is hot andv before it has cooled or has begun to set.
-The press is designed to apply heavy pressure to the roll and thus it gives to the lug strap the desired shape as shown in Fig. 6. The pressure is maintained until the glue has cooled and setso thatthere is no disturbing of the glue or of the fabric or any other part of the lug strap during the cooling or settingoperation. It will be understood, of course, that Figs. 4 and 5 show merely the side elements of the mold.
end with the side recesses 22 and at its end it is slightly concave as shown at 23', Fig. 9.
The result of this conformation is that when the lug strap is completed itwill have the convex faces 24 on the sides .adjacent'the bridge 3 and said bridge will also have the convex inner face 6. The advantage of" these convex facesis that they accommodate themselves to the rocking action of the picker stick and are'less subject to wear dur ing use than straight faces would be.
The latter will include also top and'bottom In Figs. 11 to 13 I have illustrated howi-i the. invention may be employed in making a reinforced lug strap. The lug strap herein shown, which is indicated at 25, has a 'metal' core 26 extending'around the U portion thereof, but terminating short of the-.1 "v
slotsfi. This lug strap is also provided with added thicknesses ofcloth around the U'portionthereof.
.In making. this lug strap two or more .core member 26 is formed from a piece f of layers of cloth 27-, 2S which are coated with? strap metal 30 which ispreferably slightly shown in Fig.11 and then they are rolled upiintoroll formation Such roll formationwill have a metal core COIHPIlSlHg. the
number of plies or layers at the center than longer than thelr einforcing piece 'The" parts are superposed;- one on. the other as F metal member 30 and .will have. a. greater at the ends due to the presence of the reinforcing fabric 29.
IVhile the glue 31 which is applied to the faces of these layers of fabric is still hot and before it has had time to set the roll is placed in the press and molded into the desired form, such mold being illustrated in F ig. 12 and comprising the central core portion 32 and the three mold members 33, 34 and 35 that are pivoted together are shown at 36. These mold members co-operate in the same way as described with reference to the mold members 12, 13 and 14. Where the extra reinforcing layer 29 is used to provide added thickness of cloth at the bend of the lug strap I propose to recess the inner faces of the mold members 35, 36 as shown at 37 to accommodate this extra thickness.
A lug strap made in this way will have the central metal core 26 which extends around the U and substantially to the slots 4 and will also have around the U portion the added thickness of fabric. This added thickness does not extend quite to the end of the metal reinforcing member but it gives added strength and reinforcement to the portion of the lug strap which is subjected to the severest wear.
In all forms of the invention the roll is molded into the final shape of the lug strap while the glue is still warm and before it has begun to set and is then subjected to heavy pressure, which pressure is maintained while the glue is drying and setting. There is, therefore, no movement of any part of the lug strap while the glue is cooling or setting and the latter will maintain its full adhesive efficiency.
It will be noted that the mold or press is so shaped as to form a lug strap in which Y the bridge portion 3 is straight transversely. In other words, the inner face of this bridgeportion 3, which is the face that acts against the picker stick, is straight in the direction of its length and thus will'fit flatly against the picker stick. This is a decided advantage as it reduces the wear on the lug strap.
The important thing about my invention is that the fiat face with which the picker stick has engagement is secured without the use of a plug in the bend of the strap. It is a more or less common practice to place such a plug in the curve of the strap to provide the flat face, these plugs being generally riveted in position. My invention provides a fiat face and a lug strap which has long life without the labor and expense mvolved in riveting the plug in the lug strap.
I claim.
1. The improvement in the art of making a lug strap which consists in rolling a plurality of superposed layers of fabric in hot glue to form a roll, placing on one side of the roll at the central portion thereof a maintaining the layers of fabric and leather.
under pressure in an undisturbed condition during the entire time that the glue is setting.
2. A lug strap for looms having a general U shape and provided with slots at the ends of its arms, said lug strap being made of a plurality of plies of fabric adhesively united under pressure, there being a greater number of plies at the U portion thereof than in the arms, the inner face of the closed end of the strap being at substantially right angles to the inner faces of the arms of the strap and the inner face at the bow end of the lug strap being convex and said lug strap having a single metallic core extending around the U portion or how end centrally thereof, the ends of the metallic core terminating between the bow end of the strap and the slots in the arms. 7
In testimony whereof, I have signed my name to this specification.
HERBERT E. WILSON.
US402848A 1929-10-28 1929-10-28 Lug strap and method of making the same Expired - Lifetime US1909993A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629405A (en) * 1949-09-22 1953-02-24 Buchi Hans Loom lug and check strap
US3646973A (en) * 1970-03-12 1972-03-07 Impact Plastics Inc Lug strap assembly and method of forming same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629405A (en) * 1949-09-22 1953-02-24 Buchi Hans Loom lug and check strap
US3646973A (en) * 1970-03-12 1972-03-07 Impact Plastics Inc Lug strap assembly and method of forming same

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