Патент USA US2410383код для вставки
Oct. 29, 1946. J, _;_VKAKUFMANNS JR LOOM SHUTTLE Filed Ja?. ll, 1945 I 2,410,383 2,410,383 Patented Oct. 29, 1946 UNITED STATES ’ PATENT i oFF-ics [ff .lohn J. Kaufmann, .l r., Greenville, S. C., assignor to Steel Heddle Manufacturing Company', Philadelphia, I’a., a corporation of Pennsylvania ` Application January 11, 1945, Serial No.>5'l'2`,34'5$f ' (Cl. 139-217) ’l Claims. l This invention relates to shuttles for looms, andit relates more particularly to the provision of improved means, in such shuttles, for main taining the proper tension on the filling yarn as f a tension device, of the character aforesaid; which will be simple and inexpensive in 'construc tion, which may be readily and easily `assembled in the threading'block, and which is adjustable therein without dismantling the same. the shuttle is passed back and forth through successive sheds of the warp. In the shuttles which are used in the modern types of automatic looms a threading'block is usually provided 'at one -end of the'shuttle, which block is provided'with means for automatically causing the filling yarn to be threaded in the shuttle immediately after the bobbin has been replenished in the shuttle. Such threading blocks are made in various shapes and styles and in >some instances, where it is desirable to con tr‘ol the tension of the filling thread more or less '- ’ The nature and characteristic features of the invention will be more readily'understood‘from the following descriptions taken in Acor'mection with the accompanying drawing forming part hereof, in which: ' 'n _' Figure 1 is a top or plan view of the threading end portion of a loom shuttle having a threading block mounted therein and provided' with a ten sion device embodying the main featuresofthe present invention; ' j., p Fig'. 2 `is an enlarged end elevationv of Vthe~ threading block detached from the shuttle,'illus-' trating more particularly the constructionL and " accurately, said threading blocks are provided, usually at the end thereof to which the filling arrangement of the tension members which- .are block, with> spring , pressed members between 20 mounted Fig. 3 istherein; an enlarged longitudinal'se‘ction ' ' ' ` ' ofthe which the thread travels as it passes to the chanT i threading block detached, the section being taken nel Vof the threading block, and thereby there thread is fed from the'bobbin to the threading is provided a uniform tension on the filling yarn lFig. 4 is an enlarged horizontal section of a as the shuttle passes from side to side of the loom in the operation thereof. portion of the threading block, taken on the lirie p’ " " i Various Aforms of such tension devices have d-ß ' Figïß of Fig. is an 2; enlarged hori‘zontaljsectionbf ì .. " a heretofore been suggested, Yand it has lone been recognized, as a’desideratumjo provide, in con nection‘ with the tension members, some means, or van arrangement thereof, whereby there Will portion-of the threading block, taken on thve'li'n'e i Fig. 6 is an enlarged longitudinal fs‘ection ofa portion ofthe threading block assh‘ownfi'n' Fig '3' bea tendency o_f the filling yar'nt'o pass down but illustrating amodlned‘form eff tension " wardly at the entrance end ofthe threading block,v to the end that- there will be less vlikelihood of *ther shuttle becoming unthre'aded during the 'operation of the loom, by reason 'of overthrows or loops which sometimes occur upon the rever ber. It should, .. of , course' „ .,be . understood . , „ 'that' , tl’iê r,def scription and drawing herein are illustrative ~ merely, devices or arrangements have not proved entirely ' y ’ ' j ' . and ‘ that ,various rn'odificatîons_"and changes may be made in thewstructuredisclosed Without departing from the spirit of the inven sal of movement of the shuttle.` However, such satisfactory in use.V ‘ " tion. ' " ì ' Referring to the drawing, in the particular embodiment of the invention therein shown, the 'shuttle'body l0 is preferably’made of wood, and Y 'f'he- principal objectithere'fore', of the present invention, is 'to provide anV improved form of ten-` sion device for automatically threading shuttles, has the‘usual bobbin'chamber Il in which the vvhi'chis so `constructed ‘and arranged as to cause thejfilling yarn to‘pass downwardlyinto the low--y bobbin l2 is held by the 'usual grippingV means er‘portion‘of the thread Vchannel‘and to so main-y tai'ngSaidV yarn so'v that likelihood of unthreading of the shuttles from overthrows or loops will be charged therefrom and a new bobbin substituted (not shown), whereby it may be readily -dis as the fillingruns out from time to ti‘mef i" . ' ` Y The shuttle body lll is also providedwith y.the usualside delivery eye I3 'for the passageofjth'e A further object of the invention is to provide aftension device,'of the character aforesaid, in 50 filling yarn ld. The vthreading block ll 5 comprises which“ the initial' threading of the shuttle will be ' primarily a casting preferably made of _ metal', either cast iron or brass as desired; >Said block greatly facilitated by reason "of the ease with lähasits outer'side surfaces I6 and f_ll prefer.v which the filling thread will pass to' the proper ably parallel withl each other, and its bottom sur location between' the t'ensionmembers ` greatly minimized. , ' ¿A further’object of theV inventionv is Yto provide 55 face „i8 substantially atv right ?angles,theretcvn'."Ifhe $2,410,383 4. body portion of the threading block I5 is fitted the other edge thereof. This arrangement will tend to facilitate the passing of the filling thread into a complementally shaped groove I9 in one end of the body portion IE) of the shuttle. to the proper location between the tension mem The body portion of the threading block I5 is bers when the threading action takes place. This provided with a longitudinal channel 2U through which the filling thread I4 passes to the side de arrangement will also serve to increase the efû ciency of the tension device and reduce the like livery eye I34 during the weaving operation and lihoodof >breakage ofl the fillingy thread from as said filling'îyarn is laidA in the cloth.v knots or unevenness therein. l .f The threading block I5 may also -be provided In the modified form of the invention shown with a rearwardly extending horn portion 24, and 10. in Fig. 6 of thc drawing the face portion of the an intermediate horn portion 25 extending into tension member 25a is tapered from the top to the longitudinal channel 20 of the threading block the bottom by providing an inclination along I5, said horn portion 25 serving to assist in the each of the side edges thereof, and in this man initial threading of the block, and in the reten ner the degree of the taper may be increased. In tion of the ñlling yarn therein after the threading 15 this instance the flange ¿lia will also be reversely operation has been completed. At the inner end of the threading block I5, that is, the end disposed toward the bobbin, there tapered. In either of the foregoing arrangements the filling yarn, as it travels between the tension is mounted a pair of tension members 26. The members, will be caused to pass downwardly by reason of its natural inclination to take the path of least resistance and to position itself where the width of the tension members is less. Further more, the reverse taper of the portions 44 will assist in causing the filling thread to be impelled downwardly as it runs through the threading inner end of the threading block I'I is recessed vertically, as at 28, for the mounting of said ten sion members- 26 therein. .The lower ends' of the tension members are each’provide’d with a suitable aperture 29 through which extends a pin 3i) mounted in the lower portion in the >inner end of the threading block I5. The upper end lof each of the tension mem block. 4Iclaim: bÍe?s is 'bent .over as at 3l to provide lug like ex~ tensions '32 which are positioned respectively in Y . _ . 1. In a loom shuttle of the automatic thread ing type a tension device comprising a pair of suitable apertures 33 provided in the inner end of 30 spring pressed tension members between which theïthreading block I5. In this manner the ten the filling yarn passes, said tension members hav sioiimembers 26 are guided at both the top and ingiiat coacting faces tapered from the top to the bottom. ` , A ward the bottom. - For the purpose of imparting the required ten 2.~ In a loom shuttle of >the automatic threading sion to the members 26 so that the same will grip 35 type having a threading block mounted in one the filling yarn and >function in the desired man end thereof which threading block is provided ner. ashereinafter set forth, there are provided with' a longitudinal thread channel through which coil springs 34 >which are positioned in the inner endsl of the hollow screws 35. The hollow screws the filling yarn passes from the bobbin to the outlet and spring pressed tension members 35 are threaded in the side walls of the threading 40 mounted in the` threading blockbetween which block I5 in alinement with the pin 3i) at the bot the' ñllingyarn passes, said tension members hav tom and the guiding apertures 32 at the top. The ing their coacting faces tapered from the top to hollow screws 35thusserve to provide means for War'dvthe bottom and having reversely tapered regulating the degree of tension on the members . portions along their entrance sides. 25>_ - . . ` The co-acting faces of the tension members 2B are preferably -made flat, as hasy been the practice heretofore, but in the present .instance said co acting faces of the tension members are tapered 45 3. In a loom shuttle of the automatic threading type having a 'threading block mounted in one endÍ thereofwhich threading block is provided with _ a longitudinal thread channel through which the ñlling yarn passes from the bobbin to toward the bottom 'for a purpose to be presently 50 the outlet and springlpressed tension vvmembers eirplain'eid‘.'lv ’The tension members may, of course, mounted in the threading block between which be'providedwith the usual side flanges all at the flñlling yarn passes, said tension members either theentrancc side `or on the other Vside having" their coactingfaces tapered from the top thereofîjas at jlll. `.'I‘he essential requirement in toward the bottom and having flanges along their connection with the present invention is that the 55 entranceside’s connected to the face portions by co-acting’ faces of' the tension members be ta reversely tapered portions. ' ' ' pered' toward the. bottom. 4. In a loom shuttle of the automatic thread ` Preferably the flanges 40 vat the entrance side ing type having having a threading block mount overlap the sides of the slot 28, in which the ten ed in one end thereof _which threading block is sion members‘ZB are positioned, and extend into 60 provided with . a longitudinal thread channel recesses 43.in the inner end face of the thread through whichtheA filling 'yarn passes from ’the ing block. Also the flanges 4U are preferably dis bobbin to the outlet 'and spring pressedV tension posed parallel to theY vertical axis of the tension memfbers'mounted in the _threading block between membrersand are connected to the main face .„ which the ñlling yarn passes, said tension mem portions thereof by inclined and reversely tapered 65 bers having their coacting faces tapered from portions _44 _ Y . I_t shouldfalso be noted that the flanges 4U along the entrance sides of the tension members 26 arc disposed at a somewhat greater distance the top toward the bottom and having flanges along their sides. ' _ . .. .5. In a loom shuttle of the automatic threading _ type having a threading block mounted .in one from the vertical plane which passes through the 70 end thereof, which threading block is' provided 'elites of the coil' springs than are the flanges 4I with a longitudinal thread channel through which along the opposite sides of said tension members. the filling. yarn ?passes yfro-In the bobbin to the In this manner the'pressure exerted alongthe outlet, and spring "pressed tension members edge at _which the filling thread enters the thread mounted in the threading block‘between which ing block will be considerably less than along 75l the filling yarn passes. said tension members hav 2,410,383 6 ing flat coacting faces tapered from the top to Ward the bottom. 6. In a loom shuttle of the automatic threading type having a threading block mounted in one end thereof, Which threading block is provided with a longitudinal thread channel through which the filling yarn passes from the bobbin to the outlet, and spring pressed tension members 7. 'In a loom shuttle of the automatic threading type having a threading block mounted in one en'd thereof, Which threading block is provided with a longitudinal thread channel through which the ñlling yarn passes from the bobbin to the outlet, and spring pressed tension members mounted in the theading block between which the iîllling yarn passes, said tension members having their coacting faces tapered from the top mounted in the threading block between which the filling yarn passes, said tension members hav 10 toward the bottom and having flanges along the sides, the flanges along the entrance sides being ing their coacting faces tapered from the top disposed a greater distance from the point of toward the bottom and having the edges along application of the spring pressure` than the flanges the entrance sides thereof disposed a greater dis along the other side. tance from the point of application of the spring pressure than the edges along the opposite sides 15 thereof. JOHN J. KAUFMANN, JR. .