US1989055A

US1989055A - Harness for cross weaving

Info

Publication number: US1989055A
Application number: US650879A
Authority: US
Inventors: Kaufmann John Jacob
Original assignee: Steel Heddle Manufacturing Co
Current assignee: Steel Heddle Manufacturing Co
Priority date: 1933-01-09
Filing date: 1933-01-09
Publication date: 1935-01-22
Anticipated expiration: 1952-01-22

Description

Jan. 22, 1935. J. J. KAUFMANN 1,989,055

HARNESS FOR cRoss WEAVINGk Filed Jan. 9, 1935 F5593. 27g/.4. r

ML. K

Patented Jan. 22, 1935 UNITED STATES HARNESS Foa caoss WEAVING John Jacob Kaufmann, Elkins Park, Pa., assignor to Steel Heddle Manufacturing Company, Philadelphia, Pa., a corporation of Pennsylvania Application January 9, 1933, serial No. 650,879

1o claims. (01.139452) vMy invention relates to metallic loom harness for use'in that lmethod of weaving known as cross weaving, sometimes called doup weaving or leno weaving in which the warp threads v are crossed or twisted about each other at as many points in the shed as may be desirable, either for a succession of picks, or according to a pattern or design to be produced.

This invention relates more particularly to the construction and formation of the guide or lifting heddles which are employed to raise the doup needles and thus cause each of the doup warps controlled thereby to be disposed on one side or the other of its ground warp as required.

The principal object of my invention is to provide a metal harness for cross weaving in which possibility of fouling of the warp threads will be eliminated, which will be simple, durable, and efficient for all types of cross weaving, which will be relatively inexpensive in construction, and which will be particularly useful for weaving the finer grades of cross woven fabrics.

With the foregoing object in view, my invention contemplates the provision of a doup needle, preferably punched from sheet metal, and a pair of lifting heddles of novel conformation for each doup needle, each of which heddles is made from a single strip of thin flatl metal.

My present Ainvention is particularly adaptable for use in connection with jacquard shedding mechanism, and insures the utmost freedom in the shedding of the warp, as well as serving to guide the warp during the shedding action so that the same will not be caught on the top of the doup needle or jammed between the needles and the lifting heddles and thus improperly raised. The nature and characteristic features of my present invention will be more readily understood from the following description, taken in connection with the accompanying drawing forming part hereof, in which:

Figure l is an elevational view of one pair of heddles, and the associated parts, for controlling a pair of warp ends;

Fig. 2 is an enlarged detail view of the central portion thereof; K

Fig. 3 is a side elevation of that portion of the structure shown in Fig. 2; and

Fig. 4 is a face View of a preferred form of doup needle employed in association with the lifting heddles for controlling the doup warp.

It will of course be understood that the description and drawing herein contained are illustrative merely, and that various changes and modifications may be made in the structure disclosed Without departing from the spirit of the invention.

Referring to the drawing, in the particular embodiment of my invention therein shown, fi()l is the doup needle, which is preferably made by punching or stamping from a thin flat strip or sheet of metal. The doup needle 10 has at one end an eye portion l1, in which the eye 12 for the control of the doup warp 13 islocated. The ground warp 14 extends freely between the pair of lifting heddles, and is controlled, in the event that it is desired to raise and lower the same, by separate harness (not shown). The outer margin l5 of the eye end 11 of the doup needle 10.is arched or curved, and the inner under margins 16 thereof are' also curved, in gothic formation, meeting in a central apex. i

Extending from the eye end 11 of the doup needle 10 are two legs il?, which terminate in enlarged portions 1'8, eachV of which is provided with a` `slot.l9,' for connection of the doup needle l0 with the needle'lo'wering means, such for example as the lingo 2U. As shown in the drawing, the slots 19 in the ends of the legs 17 of the doup needle 10 may be brought into register, and a single lingo 20 hooked through the openings in both'legs.v f

There are provided-two lifting heddlesy 21, each ofwhich is formed from a single strip of th'iniflat metal. Each of the lifting heddles 21 has a 'straight upper portion 22, an intermediate inclined offset portion 23, and' a-straight lower portion`24, all preferably arranged withl their facesin planes at right angles to the plane of the doup needle 10. Each of the liftingheddles`21 is also slotted, for theextension ofthe doupneedle'therethrough, the `slot 25` being disposed in the" inclined onset portion 23 and extending downwardly a short. distance into the body of the lower `straight portion 24.! 1 Each of the shankspof the slotted portion of the lifting heddle 21 is slitted,\and at the slitted portion one part 26 of each shank is bowed forwardly, andfthe' other part 27 yis bowed rearwardly, thereby to vprovide a guide and guard which, when the heddle is in the lifting position with respect to the needle, extends over the eye end 11 of the doup needle and which prevents the ground warp 14 from becoming caught on the horizontal portion of said eye end of the doup needle. The guard which is thus provided by the bowed portions y26 and 27 of the shanks of the slotted portion of the lifting heddle 21 will also serve to preventV the vwarp ends which pass between adjacent sets of heddles from becoming lodged or caught on the eye end of the doup needle. v

Each of the'lifting heddles 21 may have a jacquard cord attached to the top end thereof, in the usual manner, and Ya lingo28 may be hooked to the lower end of each of said lifting heddles. A, u

By the provision of the slotted offset portion 23 of the lifting heddle 21, an appreciable lspace 29 will beobtained between the side margin of the leg portion 17 of the doup needle 10 and the upper portion 22 of the lifting heddle 21 which remains in the lowered position, thus preventing the ground warp 14 from being gripped between the doup needle 10 and the upper portion 22 of one of the lifting heddles when the other is raised, which would improperly raise the ground warp and cause a mispick.

By reason of the gothic formation of the inner margins 16 of the eye end 11 of the doup needle 10, said eye end will be properly centered with respect to the lifting heddle 21, and in this manner the

bowed guide portions

26 and 27 will be so positionedI with respect to theeye end Vof the needle, as the lifting heddle is raised, as to guide any of the warp ends which would tend to lodge on the top of the needle to such position that the same will readily slide down the side of the needle.

Furthermore, cross weaving harness constructed as aforesaid will be quite free in its action, so that there will be no likelihood of the doup needle remaining in the elevated position when the lifting l heddle vis lowered, nor will there be any likelihodfof the lifting heddles themselves being improperly 4held in an elevatedposition by reason of any jamming'with respect to the doup needle.

It will therefore be seen that there is provided a cross weaving harness which may be controlled by shaft harness frames but which, however, is particularly adaptable for jacquard control, in that the weight of the lingoes will at all times be sufficient to return the parts properly to their lowered positions.

I claim:

1. In harness for cross weaving, a lifting heddle made of a single flat strip of metal having a portion 'slotted for the extension of the doup needle therethrough, and having a guard adjacent the slotted portion extending beyond the medial line of the` doup needle to guide the warp over the top rof the doup needle, when the heddle is in the lifting position with respect to the doup needle.

' 2. In harness for cross weaving, a lifting heddle made of a single fiat strip of metal having a portion slotted for the extension of the doup needle therethrough, and each of the shanks of the slotted portion having one part extending forwardly and another part extending rearwardly, thereby to provide a guard to guide the warp over the top of the doup needle.

v3. In harness for cross weaving, a lifting heddle made of a single flat strip of metal having a portion slotted for the extension of the doup needle `therethrough'and each of the shanks of the slotted portion being slitted, one part of said,

slitted portionv of each shank being bowed forwardly and the other part thereof being bowed rearwardly, therebyto provide a guardl to guide the warp over the top of the doup needle.

`4. Inharness for cross weaving, a lifting heddle made of a single flat strip of metal having an upper straight portion, an intermediate inclined offsetv portion, and a lower straight portion, the offset portion being slotted for the extension of the doup needle therethrough, vand each of vthe shanks of the slotted portion being slitted, one part of said slitted portion of each shank being bowed forwardly and the other part'thereof being bowed rearwardly, thereby to provide a guard t0. guide thev warp over the top of the doup needle. In harness for cross weaving, a doup needle having` an eyethrough which the doup warp extends, said needle being made of thin at metal, a pair of lifting heddles each made of a single fiat strip of metal having anupper straight portion, an intermediate inclined offset portion, and a lower straight portion, all arranged with their faces lying in planes at right angles to the plane of the doup needle, and the offset portion being slotted for the extension of the doup needle therethrough.

6. In harness for cross weaving, a doup needle having an eye through which the doup warp extends, a pair of lifting heddles each made of a single flat strip of metal having a portion slotted for the extension of the doup needle therethrough, and having a guard adjacent the slotted portion extending beyond the medial line of the doup needle to guide the warp over the top of the doup needle when the heddle is in the lifting position with respect to the doup needle.

7. In harness for cross weaving, a doup needle having an eye through which the doup warp extends, a pair of lifting heddles `each made of a single flat strip of metal having a portion slotted for the extension of the doup needle therethrough, and each of the shanks of the slotted portion having one part extending forwardly and another part extending rearwardly, thereby to provide a guard to guide the warp over the top of the doup needle.

8. In harness for cross weaving, a doup needle having an eye through which the doup warp lextends, a pair of lifting heddles each made of a single flat strip of metal having aportion slotted for the extension of the doup needle therethrough, and each of the shanks of the slotted portion being slitted, one part of said slittedl portion of each shank being bowed lforwardly and the other part thereof being bowed rearwardly, thereby to provide a guard-to guide the warp over the top of the doup needle.

`9. In harness for cross weaving, a doup needle having an eye through which the doup warp extends, a pair of lifting heddles each made of a single flat strip of metal havingan upper straight portion, an intermediate inclined offset portion, and a lower straight portion, all lying in planes at right angles to the plane of the doup needle, the offset portion being slotted for the extension of the doup needle therethrough, and each of the shanks of the slotted portion being slitted, one part of said slitted portion of each shank being bowed forwardly and the other part thereof-'being bowed rearwardly, thereby toprovide a guard to guide the warp over the top of the doup needle.

10. In harness for cross weaving, a doup needle having an eye through which the doupwarp extends, said needle being made of thin iiat metal, a pair of lifting heddles each made of a single flat strip of metal having an upper straight portion, an intermediate inclined `offset portion, and a lower straight portion, al1 lyingl in planes at right angles to the plane of the doup needle, the offset portion being slotted for the extension of the doup needle therethrough, and each of the shanks ofthe slotted portion being slitted, one part of said slitted portion of each shank being bowed forwardly and the other part thereof being bowed rearwardly, thereby to provide a guard to guide the warp over the top of the doup needle, and the inner margins of the eye portion of the needle being curved and extending to a central apex thereby to center the eye portion'of the needle with respect to the guard when the lifting heddle is raised.

JOHN JACOB' KAUFMANN.