US2389258A

US2389258A - Harness for cross-weaving

Info

Publication number: US2389258A
Application number: US544026A
Authority: US
Inventors: Hilton George
Original assignee: Steel Heddle Manufacturing Co
Current assignee: Steel Heddle Manufacturing Co
Priority date: 1944-07-08
Filing date: 1944-07-08
Publication date: 1945-11-20
Anticipated expiration: 1962-11-20

Description

Nov. 20, 194-5. H L oN $389,258

HARNES S FOR CROS S -WEAVING Filed July 8, 1944 2 Sheets-Sheet 1 Nov. 20, 1945. G. HILTON Y HARNESS FOR CROSS-WEAVING Filed July 8, 1944 2 Sheets-She'et 2 Patented Nov. 20, 1945 HARNESS FOR CROSS-WEAVING George Hilton, Northbridge, Mass, assignor to Steel Heddle Manufacturing Company, Philadelphia, Pa., a corporation of Pennsylvania Application July 8, 1944, Serial No. 544,026

7 6 Claims.

This invention relates to harness for crossweaving, and it is particularly adaptablefor use in connection with the modern fiat steel doup needles and lifting heddles now commonly used for cross-weaving. This invention serves to eliminate the jumper harness and the mechanism for operating thesame customarily used in connection with such devices; and it also takes the place of the easer bar, and the springs or other devices used in connection therewith, for maintaining the requisite tension on the doup threads.

At thepresent time most of the lenoor crossweaving is done by means of flat steel harness of the type shown in the Kaufmann Patents No. 1,037,150 and No. 1,037,151, in which there is provided, for pairs of warp ends, a flat steel doup needle or half heddle having an eye in the end thereof for controlling thedoup thread, and two standard or lifting heddles between which the ground thread extends and which alternatively raise the doup thread on one side or'the other of the ground thread, thereby to bring about the requisite twist of the warp ends during the weaving operation. a

However, in the use ofharness of the type aforesaid, as wellalso in connection with cer-' tain other types of doup harness, it has been considered necessary to employa jumper harness including individual heddles through-which the ground ends are entered, and an easer bar,

sired tension on the doup ends yet permitting the same to be raised and lowered as required. Mechanism for operating the jumper harness in timed relationship has also been required so that the proper times and to the proper extent. 1

The principal object of the present invention is to provide a simple and inexpensiveyet efficient device, which will be automatic in its action, which will eliminate ,the necessity of employing the jumper harnessand its actuating mechanism,

(Cl. 13950), I

usually spring controlled, for maintainingthe dcground ends are also raised and lowered at the Fig. 2 is a similar view in which, however, the doup needle, and the warp thread controlled thereby, is shown as having been raised by one of the standard or lifting heddles;

'Fig. 3 is a fragmentary elevational view of a portion of a loom with a device embodying the main features of the present invention shown in connection therewith;

Fig. 4 is'a top or plan view of the apparatus shown in Fig. 3; and

Fig. 5 is a section taken on the line'5-5 of Fig. 3.

Referring now more particularly to Figs. 1 and 2 of the drawings, in the arrangement there harness, some or all of said warp ends beingseparated into pairs of doup threads l5 and ground threads l6. Each doup end 'l5 extends through the eye I! of a doup needle' I8 which preferably is of the type shown in the Kaufmann Patent No. 1,037,151, hereinbeforereferred to. The doup needle I8 is controlled in the usual manner bythe standard or lifting heedles I9 and 20 and the,

ground end I 6 of a particular pair passes between the lifting heddles l9 and 20 in the usual manner.

The device comprising the principal part of the present invention is preferably interposed between the stop motion and the weaving harness, usually being positioned immediately above and in front of the crank shaft 2| of the loom. Said device consists essentially of a pair of rods22 and 23 extending across the loom, said rods being mounted in rocker arms 24 at their respective ends. Each of the rocker arms 24 is provided with a trunnion 25 which is pivotally mounted in a bearing block 26.

The bearing block 26, on each side, is slidably mounted in a slot 21 in a supporting bracket '28 and normally is impelled downwardly. by-means of a coil spring 29. The" lower end of .the coil spring 29 bears against the bearing block 26 and the upper end of said spring is'engaged by the lower endof an adjusting screw 30 which is threaded in the upper portion of the bracket 28.

The bracket 28 is fixedly secured to another bracket 3| by means of bolts 32, and said bracket 3! is adjustably secured by means of a bolt 33 to the slotted vertical leg portion of an angular bracket member 34. .The horizontal portion of the angular bracket member 34 is adjustably se In entering the warp in the loom the doup. 10

threads (5 are passed over the rearmost rod 22 and under the foremost rod whereas the; ground threads l6 are passed under the rearmost rod 22 and over the foremost rod 23. The

operation of the device of the inventibnmay now" I be explained.

Referring now more particularly. to Figs. 1" of the drawings, it will be noted that when the. parts of theweaving harness are in neutral positions, as shown in: Fig. L, the' transverse rods 22 and; 23 of the device of; the: present invention will occupy certain; positions, resulting from the relative tension of the doup threads: l5 and the ground threads Hi. When, however, the warp is shedded ,for the purpose of. passing. the shuttleg. one or the other of; the lifting hedd'les will be raised to caus the doup thread: l5 of. each pair to pass on one side or the other of the ground thread l6 of said painaccordingtow-hich or the lifting hedd-lesis raised; all of. which will be readily understood by those familiar with this art.

Whenthe' doup threads l5 are; raised,v on either side of. their respective ground threads it, this r causes a. greater tensionto be: imparted t the doup: threads I5 and would ordinarily, slacken ground threads t6. Howevenwi-ththe device 01? the present invention when the doup threads I'E are raised the foremost. bar 23 will thereby;

be raised and, by reason of the. pivotalmounting oi the rocker. arms 24, the rearmost rod 22 wilt be simultaneously lowered but to a much greater extent, and therebyautomatically serve to take up' the slack of the ground ends, it and: insure the properiormation: of. the. weave.

It wilt, of; course, be noted that the bearing blocks 26; inwhich: the trunnions' 25 of the rocker arms: 24: are pivoted, are permitted a limited amount of vertical movement under the manlatable tension imparted by the coil spring 29 and. the adjusting screw 39a arrangement permits the rocker arms, and the transverse rods 22. and 23 carried thereby, to be: unitarily raised to a limited extent and thereby prevents undue: tension being imparted to the warp. at certain times in the operation oi the harness.

I claim:

l2. In harness for cross-weaving, in combination with means for raising the doup threads 21-- ternatively on one side or the other at their respective ground threads, of means actuated by the tension of the doup threads for automatically'taking up the slack. of theground threads when. the doup threads are raised.

2. In harness for cross-weaving, the combination with means for raising the doup threads alternatively on one side or the other of their respective ground threads, of means controlled by the tension of the doup threads for automatically taking up the slack of the ground threads, and resilient, means for relieving the, tension of the" warp-when. required.

3. In harness for cross-weaving, in combination with means for raising the doup threads alternatively on one side or the other of their respective ground threads, of a pair of transverse rodsextending across the loom, the doup threads passing, under one;v of said rods and the ground threads passing under the other of said rods,

, and a positive connection between said rods whereby when one of said rods is raised by the tension of said doup threads the other of said rods will be automatically depressed and thereby take up the slack ofthe ground threads.

4'. In harness for cross-Weaving, incombina tiorr with means for raising the doup-threads alternatively on one side or the other of their respective ground threads; of a pair of transverse rods extending across the loom, the doup threads passing under one of said rods andthe ground threads passing-under theother of said rods, and freely pivoted rocker arms supporting said rods whereby when one of said rods is raisedby the tension ofsaid doupthreads the other of said rods will be depressed and thereby take up the slack of the ground threads.

5. In harness for cross-weaving, in combination with means forraising the doup threads alternatively on ne side or the other of their respective ground threads, of a pair of transverse rods extending across the 10cm, the doup threads passing under one of said rods and the ground 4 threads passing under the other of said rods,

rocker arms supporting said rods whereby when one of said,- rods is raised by the tension of said 'doup threads the other of said rods will be depressed and thereby take up the slack of the ground threads, and aspring mounting for said rockerarms permitting a limited unitary elevation of said rocker arms and the transverse rods carried thereby.

ground threads, and a spring mounting for-said supporting means permitting a limited unitary elevationof said transverse rods to relieve the tension on the warp when required.

' V GEORGE HILTON.