US2573666A

US2573666A - Loom shuttle

Info

Publication number: US2573666A
Application number: US774901A
Authority: US
Inventors: Jr John J Kaufmann
Original assignee: Steel Heddle Manufacturing Co
Current assignee: Steel Heddle Manufacturing Co
Priority date: 1947-09-19
Filing date: 1947-09-19
Publication date: 1951-10-30
Anticipated expiration: 1968-10-30

Description

06f. 30, 1951 1 J, KAUFMANN, JR 2,573,666

LOOM SHUTTLE Filed Sept, 19. 3.947

IN VEN TOR.

jo-n B Patented Oct. 30, 1951 vUNVrEo STATES PATENr, oEElcE LOOM SHUTTLE 'to Steel Heddle Manufacturing Company,'

corporation lof' Pennsyl- Philadelpha, Pa., a wania Y Applicationseptember 19, 11947',sria1n0. 774,901

This invention 'relates to shuttles for looms, and it relates more particularly tol improved threading means in shuttles of the automatic type.

In the shuttles which are used in modern types of high speed automa-tic looms, a threading block isjusu'ally provided at the rear-endv ofl the shuttle. Suchthrea'dingblccks aremad-ein various shapes andi styles and are designed to cause the filling yarn, after an 'empty bobb'in has been displaced and a full one substituted therefor, to be threaded automatically through the vthreading block and thence through a'side'delivery'eye. The threading action usually starts 'on'.the, first pick ofthe shuttle and is completed on the'flrst return Apick thereof.

7 The presentl invention. contemplates the use of a threading block, the main or vbody portion ofY which is made of a casting of' iron, brass, orother suitable material having novel tensioningY means for the lling yarn, novel takeup mechanism therefor, and a novelconstruction and arrangement of the outlet eye.

vThe principal object'of the present invention is,v to provide a novel and efficient form of threading block for automatically threading loom. shuttles, the main or body portion of which may be made of a casting of iron,. brass, -or other. suitableY material, having incorporated therein improved tension devices, improved takeup'mechanismvand an outlet eye formed directly in the threadingblock casting.

A further object ofthe invention is to provide, in a shuttle threading blockof' the character aforesaid, a novel form oftension pads which will function effectively not only as a first pick tension device, but also for the purpose of maintaining a constant frictional tension on the illing` yarn afterl the shuttle has been completely threaded.

A further object of the invention is to provide, in a shuttle threading block of the character aforesaid, improvedy means for taking up slack. in the filling'yarn whenever the same o'ccursrduring the operation of the loom,particul'arly at the times when reversal of movement of they shuttle takes place. l

A further Aobject'of the invention is to provide, in a shuttle threading block of the` *characterv aforesaid, anovel form and arrangement of the side outlet eye,` the same `being formed' directly in' the threading block'cas't'hig.

The nature land characteristic'- features of thev invention will hemore"4 readily understood from the following description, takerr in connection with the accompanying='d'rawingl forming partvv hereof, of 'whichz 8 Claims. (Cl. 139-215) e 2 Figure 'l vis a top o r plan vview of the threading end portion of a loom shuttle having a threading block provided with means embodying the main features of the present invention;A

Fig. '2 is a side elevation thereof; Fig. B is a longitudinal central sectional view thereof; Y

Fig. 4 is a transverse' sectionv taken approximately on the line -fl oFig. l1; v Eg. v5 'is a 'transverse section takenapproximately on the line 5-'-5"of Figjl;

Fig. 6 'atransverse section taken approximately onth'e line 6"--6 of Fig. 1;* A

Fig?? .is a'perspectiveview, enlarged, illustrate inga` pair of tensionhpads of the novelform contemplated bythe present invention, the same be, ing shown detached andslightly separated from each other; 'andV A y Fig'. 8 is" a Y'IJerspect'ive view, enlarged, of ,the tak'eup device forming part 'of the present inven-v tion, the same being shown,A removed from the threading block. Y V

It should, 'ci course', rbe understood lthat the description andd'rawing herein are illustrativer merely, and' that various mod'ications A'and' changes `may "be made in the structure disclosed without departing from the spirit of the inven-Y tion.

Referring to the dr'av'ving, in the particular embodiment of the Ainy'erition therein shown, the shuttle body 'Nif may bernade 'of Wood or other` suitable material Vtind'has the usual bobbin cham'- ber' I"`I in which the bobbin 1,12 is vheld 'by the usual means (nntV Shown) whereby it may be readily' discharged and a new 'bobbin substituted asthe. lling yarnl 'runs out lfro'm 'time to time. l

The threading block 'i3 comprises a casting,- preferably made' 'of material such as cast iron, although bras'sor other material' may be used, as' desired.` Said 'threading block is mounted in a ccmplem'entally lshaped"recess I4 in the rearend cfth'eiibouyportion lfof the shuttle.`

' Thefbodyporticn of the threading block laf 'is provided with a longitudinal thread charme]A 4lli through which the filling yarn passes to the side delvery'eyel during the weaving operatior'r.v

The threading block' v'I3 is provided at its rearl end, on* oneside; with a rearwardly exten'c'iin'gA prong ITT, having' an enlarged head portion W and, on the other'side,fwth'the usual rearwardlyA extending Horn portion "I9: coacting'with the head. portion `l`8`7of the prong I1, there being a guidf slot between' the end ofthe horn I9 and the side surface o f'the'head vportion I8 of thepr'ong" 'Attire forwardI fendi or the threadingA block that is, at the end thereof toward the bobbin chamber, there is provided a lug portion 2| overhanging the thread channel and serving to close the same with the exception of the thread entrance slot 22 provided on one side of the lug 2l.

The thread entrance channel thus provided at the forward end of the threading block is countersunk as at 23 to facilitate the passage of the thread into the main thread channell I as the shuttle travels back and forth acrossz'the loom in the weaving operation.

Each of the tension pads 30-contemplated by nt ided itht o arms.4 the present mve lon 1S prov W' W A53 on the flower side, being suitably shaped to disposed substantially at right angles to each other, the one of said arms 3| being disposed at a slight angle to the horizontal, and the -other of said arms 32 being disposed at a slight angle to the vertical. also preferably taperedtoward the forward end. Each `of the tension pads `30, at the `forward of. the horizontal arm 3| is provided with a sidewi-se` extension 33. The sidewise extensions 33"a`re positioned in suitable apertures 34 in the side walls of the threading block. At the lower endofthe nearly-'verticalportion 32 of each tension pad there is provided an aperture 35 through which apin `36 extends for the purpose of maintaining the tension pads-1in their proper locations within, channel I5 ofthe threading block. The ends of the` pin 35 Yare mounted in the side walls of thethreading block I3 in the usual manner.

'Tletensio'ri' pads? are impelled toward each otherv .inthe usual manner'by means of springs u tures lin the side wallspof the threading block www, I 1

The novel vtakeup device of thevpresent invention yis mountedl in the thread channel I5 of the block .l 3 and-.is shown in enlarged .perspective infFi'gLS'ofrthe drawing. The same comprises a' U-shaped member 40 having one arm 4Iv thereof seeuredinja cylindrical plug 42 which is pivoted inzonefotheside wall-portions of the body ofi thethreadingblock I3. The other arm 43 of said 3 tiglritf-4 fit in the body portion of the threading block, the arrangement being such Athat the tension of the elastic strand 46 on the stud shaft will tend to rotate the same and thereby raisev the transverse arm 48 of the U-shaped member of thevtakeup device to its uppermost position.

One side arm 43 of the U-shaped member of the takeup device is provided with a sidewise extending lug 49 adapted to encounter a portion ot the casting of the threading block at the upper limit Aof its movement.

The other side arm 4I of the U-shaped member 40 also hasV an oiiset in which is mounted an upwardly extending pin 50 around which the filling yarn passes on its way to the `outlet eye IBv during the operation of the loom.

Heretofore in-the construction of the threading-blocks of automatically threading loom shuttlesof this general type, it has been customary to provide, on the lowerside of the rearwardly extending horn member, an inclined edge whichl served to guide the lling yarn, on the rst re- 4 I turn pick of the shuttle, downwardly into the outlet eye. The outlet eye however was customarily mounted in the wooden body portion of the shuttle at the lower end of the downwardly l pins Oreyelets.

In the device of the present invention, the side ,delivery eye I6 is provided directly in the lower end of the downwardly extending portion of the horn member, the same comprising an opening 5I having an eyelet 52 made of hard materiall inserted therein. The eyelet 52 is also open as at guide the thread after it has traveled downward- `,ly along the lower inclined edge 54 of the horn The nearly horizontal arm. -3I Ai'sv-v lwhich Vareadfiustably mounted in 'suitable proper, it will, in the normal run of the shuttle, move outwardly through the eyelet 52 as the shuttle is moved back and forth across the-loom during the weaving operations.

Theoperation of the threading block of the present invention should be readily understood. On the first pick of the4 shuttle, as the same travels across the loom, the end of the yarn having been previously secured to a fixed part at the side .of the loom structure.- the same will first be drawn' downwardly into the thread channel 2 of the threading block through the slot 22 and will pass under the lug 2|.` w

VIn its passage the yarn Vwill'encounter the forward ends of the nearly horizontal arms of the tension pads,.and will pass between the same and at the same time the yarn will pass through the slot 20, between the forward end of the horn member I9 and the coacting portion of the rearwardly extending prong I1 and will, at the same time, depress the rear 'end of the U-shaped member40 of the takeup device.

As the shuttle passes across the loom on the rst pick the nearly horizontal arms 3l of the tension pads 30 will effectively serve as a first pick tension device.

AOn the first return pickv ofthe shuttle, afterthe reversal of its movement takes place, the lling yarn will' be caused to pass downwardly under the lower. inclined edge 54 of the rearwardly extending horn I 9 and guided thereby until the same passes into the'slot 53 of the eyelet 52 which constitutes the delivery eye of the shuttle. 1 n

After `the yarn has been fully threaded in the shuttle, asaforesaid, upon the subsequent movements of the shuttle, as'the same passesback and Vforth across the loon'ijthe yarn will pass outwardly through the delivery eye, and as the reversal of movement takes place, the takeup device will serve to take up any slack which may occur in the filling yarn.

` I claim: n ..1An automatically threading loom shuttle having a threading block the main or body portion of which comprises. a casting provided with a thread channel extendinglongitudinally there-f through, said threading block having a side outlet eye .for the `passage of the lling yarn, the rear end portion of: said threading block being providedfwith Vcoacting lugY and horn portions for guiding the yarn downwardly in its passage prising a` U-shaped member having a transverse bar extending across the Ythread channel .and side.'

arms the ends of which are pivotally mounted in the side walls of the casting, elastic tension mea-ns for raising the transverse bar of said takeup device, and a pin mounted on one of the side arms of the takeup device and around which the yarn passes to the side outlet eye.

2. An automatically threading loom shuttle having a threading block the main or body portion of which comprises a casting provided with a thread channel extending longitudinally therethrough, said threading bloclr having a side outlet eye for the passage of the filling yarn, means for guiding the thread into the side outlet eye, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the thread channel and side arms the ends of which are pivotally mounted in the side walls of the casting, elastic tension means for raisingr the transverse bar of said takeup device, and a projecting member mounted on one side of the takeup device and around which the yarn passes to the side outlet eye.

3. An automatically threading loom shuttle having a threading block the main or body portion of which comprises a casting provided with a thread channel extending longitudinally therethrough, said threading block having a side delivery eye for the passage of the filling yarn, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the rear end of the thread channel, and side arms having pivot members vat their forward ends said pivot members being pivotally mounted in the side walls of the casting, and elastic tension means for raising the transverse bar of said talieup device.

4. An automatically threading loom shuttle having a threading block the main or body por- -tion of Which comprises a casting provided with a thread channel extending longitudinally thereth-rough, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the thread channel, and side arms the ends of which are pivotally mounted in the side walls of the casting, elastic tension means for raising the transverse bar of said takeup device, and a projecting member mounted on one side of the takeup device and around which the yarn passes.

5. An automatically threading loom shuttle having a threading block the main or body portion of which comprises a casting provided with a thread channel extending longitudinally therethrough, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the thread channel, and side arms the ends of which are pivotally mounted in the side Walls of the casting, elastic tension means for raising the transverse bar of said takeup device, and a projecting member on one side of the takeup device and around which the yarn passes to the delivery eye of the shuttle.

6. An automatically threading loom shuttle having a threading block the main or body portion of which comprisesa casting provided With a thread channel extending longitudinally therethrough, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the thread channel, and side arms the ends of which are pivotally mounted in the side walls of the casting, elastic tension means for raising the transverse bar of said takeup device, and a pin mounted on one of the side arms of the takeup device and around which the yarn passes to the delivery eye of the shuttle.

7. An automatically threading loom shuttle having a threading block the main or body portion of which comprises a casting provided with a thread channel extending longitudinally therethrough, said threading block having a side delivery eye for the passage of the lling yarn, la takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending `across the thread channel, and side arms the ends of which are pivotally mounted in the side walls of the casting, elastic tension means for raising the transverse bar of said takeup device, and a pin mounted on the Side arm on the delivery eye side 0f the takeup device and around which the yarn passes to said delivery eye.

8. An automatically threading loom shuttle having a threading block the main or body portion of which comprises a casting provided with a thread channel extending longitudinally therethrough, said threading block having a side delivery eye for the passage of the lling yarn, a takeup device mounted in the thread channel comprising a U-shaped member having a transverse bar extending across the thread channel, and side arms the ends of which are pivotally mounted in the side Walls of the casting, elastic tension means for raising the transverse bar of said takeup device, and a pin mounted on one of the side arms of the takeup device on the side toward the delivery eye and around which the yarn passes to the side delivery eye.

JOHN J. KAUFMANN, JR.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,526,237 Rush Feb. 10, 1925 1,723,423 Hutchins Aug. 6, 1929 1,880,862 Davol Oct. 4, 1932 2,117,352 Park May 17, 1938 2,247,286 Buffington June 24, 1941 2,288,677 Blanchard et al. July 7, 1942 2,324,949 Pavia July 20, 1943 .2,403,724 Kaufmann, Jr July 9, 1946 2,410,383 Kaufmann, Jr Oct. 29, 1946