Патент USA US2111984код для вставки
' March 22,1911, , F. MElWALD ' 1 2,111,911 YARN KNITTING MACHINE Filed May 2Q 1956 M94 41-4 s Sheets-Sheet 1 ' arch 22, was. A F. MEIWALD 3,111,984 YARN KN ITTING MACHI-NE Filed May 2, v1956 3 Sheets-Sheet 3 2,111,984 Patented Mar. 22, 1938 ‘ UNITED STATES ' PATENT’ OFFICE 5 2,111,984 YARN KNITTING MACHINE Franz Meiwald,‘ Vienna, Austria, assignor to \Sinfra. A..G., St. Gallen, Switzerland, a cor; notation of Switzerland , ‘ Application May 2, 1936, 'Serial No. 77.586 - In Austria April 17, 19st ’ 11 Claims. This invention relates to a new.» and improved type of yarn knitting machine for the production of yarn knitted from two or more threads, and has for its object to simplify the construction and 5 therefore to cheapen the‘ building of such ma chines, as also to obtain advantages in connection with the operation of- such machines; , The invention will be more’ readily understood if reference be had to'the accompanying‘ draw 10 ings forming part of this speci?cation, and show ing, by way of example, a form of construction embodying the present invention. In these draw ings: ‘ _ Fig. 1 is a side elevation of the essential part 15 of the machine, shown partlyin section. Fig. 2 is a front elevation of the same, like wise partly in section. . ' Fig. 3 is a section taken on the line III—IH of Fig. 1. ' ' . - . . 20 . Fig. 4, shows th whole machine, in side eleva tion. ~ ' , ‘ . Fig. 5 is a diagrammatic representation of the . arrangement of parts provided for the purpose of stopping the machine ‘in the event of a thread 25‘breaking, and. . ' Fig. 6 is a detail view of a modified thread feed. r ' Referring to Fig. 4 the framework of the ma chine consists of two similar trestles I and trans verse members of U-section 2 to the uppermost ..30 of which, in front, there is screwed by means of screws 4 the casing 3 of the knitting heed (Fig. 1). To the rear uppermost U-section transverse mem 1 bet 2 there is similarly secured the holder~5 for the supply? bobbins 6.‘ On the lower-transverse .35 member 2 there is mounted ahthread twisting de vice of conventional design which is denoted in Fig. 4 by the reference numeral 1. The driving (01. 66-8) . 22 pertaining to the knitting head. The shafts i8 and 22 are supported‘ in the casing 3 and in a cover 23 of the latter, respectively. Fast on the shaft 22 there is a cam cylinder‘ 24 having in its periphery a cam groove 25 'in which the feet 26 (Fig. 2) of the needles 21 en-v gage. The effective parts of the needles (hook - and tongue) are inwardly-directed. There are only two needles used, and they are disposed dia metrically opposite each other and guided verti 10 cally in needle beds 28. The needle beds 28 are arranged in the usual manner to be vertically adjustable and capable of being locked in posi tion in the casing t. The adjustment of the needle beds for the purpose of altering the length 15 of the knitted loops is likewise effected in a known manner, by virtue of the arrangement that a pin pertaining to a sliding block engages in an oblique slot in the needle bed, while the said sliding block is adapted to be displaced by means of a screw spindle. In Fig. 2 this known arrange ment is partly indicated, the pin being denoted by 29, the sliding block by-t?. the screw spindle‘ by 3|, and the knob of the latter by 32. The bearing member it is provided with a super-structure 33 to which there is attached a 5 length of ?at section iron 34 (Figs. 1 and 2)‘ which carries two brackets 35, 36 for the supporting of a shaft 31. Fast on this shaft 31 there is a. roller 38 above which there is provided a roller 39 which is supported on one side in abearing 0 upright" 40 extending upwards from the bracket 38. The supporting of the roller 39 is effected with the‘aid of a shaft ‘4|, which is pivotable about a pin 42 pertaining to the upright 40, so that 5 the roller 39' can be lifted. The bracket 36 is ' provided with two stay-bolts 43 over which the . four threads 44 coming from the supply bobbins, desired manner, is denoted by 8. From this pulley » and disposed "one behind the other in Fig. 1, are a belt 9 leads, over a guide roller II), to a cord taken. These threads then travel between the 40 . r I .l pulley II which is loosely mounted on the main rollers 38, 39. ' To the driving shaft I! there is secured, with-, driving shaft l2-of-the knitting head (Fig. 1). The cord pulley ll constitutes the one part of in the'casin'g It, a bevel gear‘wheel 45 which a friction clutch theother, axially displaceable, meshes with a bevel gear 46 attached, within the part of which consists of a second cord pulley l3 casing It, to a shaft" to which there is secured, which, by means of a belt l4, drives the twisting ' outside the casing 3,a gear wheel 48 which meshes ' ' pulley, which may be driven by a motor in any device ‘I through the intermediary of a pulley l5. On the casing 3 there is mounted a bearing member l6 serving to support the driving shaft ; II. To this latter there‘ is keyed, outside the bear ing‘member IS, a bevel gear I‘! which meshes‘ with a gear wheel 49 fast on a shaft 50 supported The gear wheel 49 4 in a cover-shaped casing 5|. forms a friction wheel 52 which co-acts, through» an ‘intermediate wheel 53, with a friction wheel 54 _ '_ .with a beveligear l9 that is fast on an inter mediate shaft l8. - The bevel gear wheel I9 is which is fast on the shaft 31." The intermediate wheel 53 is idly rotatable on the smooth free end of a screw spindle 55 which is screwed into a sleeve rigidly coupled to a spur wheel 20 which in its .56 rotatably mounted in a bearing 51 secured to .55 turn meshes with a spur wheel 2| on the shaft I a pin 58Ip'rojecting from the casing 16. The 55 aliases intermediate wheel tilt is prevented from moving longitudinally on the spindle 55. The parts 56, 55, '53 are guided by means of a fork E59 which embraces the shaft til and is loosely mounted on the intermediate wheel 53. For the purpose of adjusting or shifting the spindle fit a knob tilt is provided on its lower end which projects from the bearing 5?. ' To the cover-like casing 55 there is secured for each of the four threads a wire spring (it the end of which is formed into an eyelet for the passage of the thread. The cover 23 is provided with a sleeve 62 in which there is firmly seated a bearing housing (53 which accommodates dear 15 ing for the operation of the thread guides. The mounted rollers til! which bear against the roll~ ers 9B in response to the action of a weight 99 suspended on a ?exible tension member Q8. The shaft 9d is ?tted with a. cord pulley I00 which drives, through the intermediary of a cord IM and a further cord pulley I02, a shaft me. This shaft ltd is mounted in a bearing member "it which is adapted to be slid and locked in any desired position on the stay-bolts W. The shaft tilt is provided midway with a worm Hi5 which 10 engages in a worm wheel I06 attached to a cross threaded spindle Bill supported at one endin the bearing member me. In this bearing member there are further mounted two stay-bolts N18 to which winding bobbins H09 may be ?tted. The stay-bolts Hid are ?tted with friction wheels till which are adapted to be driven by friction wheels housing 63 is adapwd to be locked by means of a set-screw B2’ in any position to which it may be Mi on the shaft “it. On the cross-threaded vertically adjusted in the sleeve $2. The shaft 22 of the knitting head is passed through the sleeve spindle till there is adapted to travel a sliding 20 block M2 which can be moved to and’ fro in a 20 62 and the housing 63, and is ?tted with a knob 64% at its upper end. To the shaft 22 there is known manner on rotation of the spindle, by keyed a gear wheel 65 (Figs. 1 to 3) which meshes virtue of its engagement in the grooving of the with two diametrically opposed gear wheels tit, , spindle. To the sliding block H2 there are se 66' (Fig. 3) which are rigidly coupled to smaller cured bifurcated thread guides H3 which partly 25 embrace the winding bobbins I09, and which ex 25 gear wheels El, 61’ which are disposed there tend to both sides of the block H2 and spindle beneath and which mesh with gear wheels d8, 68' The gear wheels dd, 66', and til, 6%’ are supported ltl. In Fig. 2 the two prongs of each of these in the housing fit. The axles On. which these thread guides coincide, so that they are seen as wheels rotate are formed of tubes 6% through one. The drive of the parts of the machine for which 30 30 which the four threads coming from the~eyelets the drive is taken from the pulley B is through on the wire springs ti pass. Each of the gears 6F, 51', and til, 68' is provided with a thread the train comprising the cord pulley H and the guide ‘it, and in the position of the parts shown clutchpart [[3, driving shaft I2, and gear wheels ii, iii, and ii, to the shaft 22 of the knitting in Figs. 2 and 3 the two guides of each adjacent head, with the result that at each revolution of 35 35 pair point in opposite directions. To the hous the cam cylinder 2d the needles are raised and ing 63 there are secured forks “ii of wire which embracethe wire springs iii and hold these latter lowered twice. Through the train of gears 135, 46, £38, £39, and the friction gearing 52, 53, and 5d the fast against lateral displacement. shaft 37!, and with it the thread feeding means Within the cover-like casing 5i’ there is at tached to the shaft ‘5d a plate l2 having two wings (rollers it and 39) , are driven. The drive for the 40 (Figs. 1 and 5). In the bearing member it withdrawing means (rollers 9! ill, on the shaft there is provided a pin ‘it which is disposed W) is taken from the shaft 31 by means of the parallel to the shaft 59,. and on which there is chain drive comprising the elements 9d, 93, and pivotally mounted a stirrup-shaped member ‘M. Q2. The rotation of the shaft til is transmitted, through the cord drive I00, ml, M2, to the shaft 45 The pin ‘it is provided with an arm. '35 which 503, and. consequently to the cross-threaded engages a shoulder it on a disc ll secured to a shaft 18 mounted in the casing it. The shaft spindle Hill and to the winding bobbins Hi9. As can be seen from Fig; 1, the four threads 18 is stressed by a torsional spring ‘it which con M are withdrawn from the supply bobbins 6 by stantly strives to turn this shaft in the direc the conveyor rolls 38, 39, and travel through 50 tion indicated by the arrow in Fig. 5, it being the eyelets of ‘the wire springs 6!, the tubes 69, prevented however from doing so by the engage ment of the arm '55 against the shoulder ‘it on and the eyelets of the thread guides l0, which the disc ‘ill. The shaft “it is provided at one end feed the threads in pairs to the two needles in ‘ with an arm Ml which, on rotation of the shaft, the following manner. To each needle there are 55 can bear against an inclined surface iii (Fig. 1) on the movable part it of the friction clutch, and fed two threads, the ?rst at the ?rst raising of the needle, and the second at the second raising displace the clutch member against the action of a plate spring 1%. The cover-like casing iii is provided, in pivoted bearings $2, with four cylinder M. This purpose is served more par ticularly by the position of the thread guides 60 sleeves iii in which there are slidably mounted wire members 8d of theupper ends of which are bent or doubled over to form hooks $5 with which the wire members are freely suspended on the threads ‘it. The lower ends of the wire mem 65 bers M are thickened by being repeatedly folded on themselves. ' To the housing 3 there are secured two down wardly extending stay-bolts d7! on which there is arranged to be slid and locked in position a bear ing member 88 having two arms 89 in which there is mounted a shaft 96 which is provided at its free ends with rollers 9|. The shaft 90 is driven of the needle during one revolution of the cam shown in Fig. 3 which of course only shows one 'of the phases of the constantly changing posi tion during the cycle of the machine. The knit~ ted yarns produced in this manner are withdrawn by the withdrawing means 9 I , 91, passing thereby over the oblique surfaces at the upper end of the needle beds shown in Fig. 2, and over guide rollers lid which are mounted on the needle beds. The entire knitting operation and the withdrawing of the yarns is visible, which con stitutes a particular advantage of the form of 70 construction according to the invention. From the withdrawing rollers 9|, 9?! the yarns travel from the shaft 31 by means of sprocket wheels - on to the winding rolls I09,.for which purpose ' ' 94 and 92 and chain 93. On pins 95 on the arms they pass through the bifurcated thread guides 76 89 there are pivoted arms 96 on which there are H3 and become uniformly wound on the rolls 75 n 2,111,984 109 in consequence of the reciprocating move ment of the thread guides secured to the sliding block'l l2. 1. ' . , If it ‘is desired to twist the yarn, the spooling device is taken off, the belt ll ?tted over the cord pulleys l3 and i5, and the yarn‘ taken to the twisting'device ‘I of conventional design. By means of the friction transmission gearing 52, 53, 54, both the rate of feed‘of the threads (and with it the length of the loops) and also the speed of the withdrawing means can be reg ulated. For this purpose-the spindle 55 is rotated by means of the knob 60, wherebythe position of the intermediate wheel 53 relatively’ to the‘ 1.5 3 ' said needles for reciprocatingmovements, said needles being'arranged in a plurality of‘ banks, a set of revoiuble thread guides supported above each bank of needles, and drive means driving said cam cylinder and thread guides. . 2. In a yarn knitting machine, a rotating cam cylinder having an external cam groove, a mul tiplicity of needles surrounding said cylinder and parallel to the axis thereof, feet on said needles engaging in said groove,‘ guide means to hold 10 said needles for reciprocatingmovements, said needles being arranged in a'plurality of banks‘, ‘ a set of revoluble thread guides supported above each bank of needles, the thread guides ‘of each friction wheels 52 and 54, and therefore also 'set each having a driven gear ?xed thereto, a 15 the speed of rotation of the shafts 31 and 90, driving gear centrally of the gears, of each set are altered simultaneously. "In order to alter the vertical adjustment of the thread guides ‘III to allow for the use of 20 needles of different length, the set-screw 62" is slackened and tightened up again after altera tion of the setting of the bearinghousing 63. On the vbrealdng of a thread the wire member . 84 suspended therefrom by its hook 85 loses its 25 hold, with the result that it slides down in its and meshing with the driven gears, and drive means driving'the cam cylinder and central gears. 8. In a yarn knitting machine, a rotating cam cylinder having an external cam groove, a multi 20 plicity of needles surrounding said cylinder‘and parallel to the axis thereof, feet on said needles . engaging in said groove, guide ‘means to hold said needles for reciprocating movements, saidneedles being arranged in a plurality of banks, a set of 25 revoluble thread guides supported above each bank of needles, the thread guides of each set each having 'a driven gear ?xed thereto, a driving ‘83 this wire member is then pushed aside by this gear centrally of the gears of each set and mesh sleeve 83 and comes with its thickened end in the path of. movement of the plate 12; In con : sequence of the pivoted mounting of the sleeve 30 plate 12, thereby pivoting the stirrup-shaped member 14 (Figs. 1 and 5), so that the arm 15 . comes out of engagement with the shoulder 16 and the shaft 18 is rotated in the direction indi cated‘ by- the arrow in Fig. 5 by the action of the spring 79, with the result that the arm 80 is pressed against the inclined surface at and disengages the part l3 of the clutch. Thus on ing with the driven gears, and drive means driv 30 ing the cam cylinder and central gears, said-drive means including a shaft whereon said cam cylin der and driving gear are mounted. ' . 4; In a yarn>knitting machine, a ‘rotating cam cylinder having an external cam groove, a multi plicity of needles surrounding said cylinder and parallel to the axis thereof, feet on saidneedles ' the breaking of. one of the threads the entire engaging in said groove,‘ guide means to hold said machine is stopped. The clutch is of course also needles for reciprocating movements, said needles 40 capable of being disengaged independently-of the described automatic stop motion. Since the knitting head constitutes an inde being arranged in a plurality of banks, a set of 40 revoluble thread guides supported above each bank of needles, the thread guides of each set' vpendent unit or assembly it can also be ?tted to each having a driven gear ?xed thereto‘, a driving existing thread machines. It will be understood gear centrally of the gears of each set and that the invention is not restricted to the con ' meshing with the driven gears, drive means driv-v crete embodiment described and illustrated by ing thecam cylinder and central gears, said drive way' of example, but can be appropriately modi means including a shaft whereon. said cam cylin-' ' , fied within the scope and spirit of the invention. Thus‘ for example in place of two needle beds 50 there could also be provided one-single needle bed or more than two needle beds. The two threads fed to one needle may be fed thereto at di?erent speeds, for which purpose the conveyor rollers 3t, 39 may either be subdivided, and their der and driving gear are mounted, and a hand wheel on the upper end of said shaft. ' 5. In a yarn knitting machine, a rotating cam dd cylinder having an external cam groove, a multi plicity of needles surrounding said cylinder and parallel to the axis thereof, feet, on said needles engaging in said groove, guide means to hold said 55 parts adapted to be driven at different speeds, ' needles for reciprocating movements, fabric feed-. 55 or made of stepped design with the retention of a common drive. As shown in Figure 6, this‘modification may 'comprise a plurality of stepped rolls it’, it’, M3, and it‘ on the shaft i‘L-which shaft and the parts it, M, M, M, and 9d are the same as illus trated in the main views of the drawings. The stepped rolls 39', M3, M3, and 394 are mounted 65 to idle on the shaft ti and are in mripheral contact respectively with the rolls 3%’, it“, M3, and-it“. It therefore follows that the revolutions caused by the differences in the diameter of the ing rolls below said cam cylinder for drawing'the knitted fabric downwardly, a main drive shaft, ' frictional gearing connecting the main drive shaft with the‘ feed rolls, said frictional gearing including a driving disk, a driven disk parallel 60 to the driving disk and eccentric thereto, an idler between said disks, and idler adjusting means to vary the position of said idler radially with re spect to said disks. 6. In Pa yarn‘ knitting machine, a rotating cam cylinder having an external cam groove, a multi plicity of needles surrounding ‘said cylinder and‘ last ‘mentioned rolls may result in imparting dif parallel‘ to the axis thereof, feet on said needles ferent speeds to the threads engaged thereby. . ( engaging-in said groove, guide means to hold said 70 I claim: needles for reciprocating movements, fabric feed 1. In a yarn knitting machine, a rotating cam ing rolls below said cam cylinder for drawing the “ cylinder having an external cam groove, a mul-> tiplicity of needles surrounding said cylinder and parallel to the axis thereof, feet on said needles 75 engaging in said ve, guide means to hold knitted fabric downwardly, avmain drive shaft, pairs of feed rollers for the. several threads con structed and arranged to feed the several threads at individual linear speeds, and frictional gearing 75 airmail plicity of needles surrounding said cylinder and groove, guide means to hold said needles for re ciprocating movements, a set of thread guides situated above each bank of needles, and driving means to actuate said cam cylinder. 10. In a yarn knitting machine, a rotating cam parallel to the axis thereof, feet on said needles engaging in said groove, guide means to hold said needles for reciprocating movements, fabric feed plicity of needles surrounding said cylinder ar ranged in a plurality of banks and parallel to the connecting the main drive shaft with the feed rolls. , 7. ‘In a yarn knitting machine, a rotating cam cylinder having an external cam groove, a multi ing rolls below said cam cylinder for drawing the 10 knitted fabric downwardly, a main drive shaft, stepped thread feed rollers feeding threads" to said guides, each step of the rollers driving an individual thread,: and frictional gearing con‘ necting the main drive shaft with the feed rolls. 15' 8. In a yarn knitting machine, a rotating cam cylinder having an external cam groove, a multi cylinder having an external cam groove, a multi axis thereof, feet on said needles engaging in said groove, means for holding said needles for recip rocating movements, a set of'thread guides sit uated above each bank of needles, thread feeding rolls for controlling the feeding speed of the thread and the length of the stitches, means for driving the cam cylinder and feed rolls, and ten ‘sion equalizing devices arranged between said plicity of needles surrounding said cylinder and ' thread guides and said feed rolls. parallel to the axis thereof, feet on said needles engaging in said groove, guide means to hold said 20 needles for reciprocating movements, said needles being arranged in a plurality of banks, a set of revoluble thread guides supported above each bank of needles, drive means driving said cam cylinder and thread guides, a vertically adjust 25 able casing supporting said thread guides above said needles, and means securing said casingin adjusted position. 11. In a yarn knitting machine, a rotating cam cylinder having an external cam groove, a multi plicity of needles arranged in a plurality of banks surrounding said cylinder and parallel to the axis thereof, feet on said needles engaging in said‘ groove, guide means to hold the needles for re ciprocating movements, a set of thread guides situated beyond each bank of needles, thread \ feeding rolls for controlling the feeding speed of the thread and the length of the stitches, a main drive shaft for driving the cam cylinder, gearing 9. In a yarn knitting machine, a rotating cam connecting the mainv drive shaft with the feed cylinder having an external cam groove, a multi rolls, and tension equalizing devices arranged be- . plicity of needles arranged in a plurality of banks _ 30 surrounding said cylinder and parallel to the axis tween said thread guides and said feed rolls. thereof, feet on said needles engaging said cam FRANZ MEIWALD.