US3641786A - Patterning mechanism for multifeed circular knitting machines - Google Patents

Patterning mechanism for multifeed circular knitting machines Download PDF

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Publication number
US3641786A
US3641786A US817930A US3641786DA US3641786A US 3641786 A US3641786 A US 3641786A US 817930 A US817930 A US 817930A US 3641786D A US3641786D A US 3641786DA US 3641786 A US3641786 A US 3641786A
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Prior art keywords
jacks
teeth
butts
patterning
presser
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US817930A
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English (en)
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Henry S Burdett
Ronald Harris
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STIBBE MACHINERY Ltd
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STIBBE MACHINERY Ltd
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Priority claimed from GB2099568A external-priority patent/GB1206225A/en
Priority claimed from GB6153268A external-priority patent/GB1206226A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Program-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Program-control arrangements characterised by the knitting instruments used
    • D04B15/74—Pattern drums

Definitions

  • SHEET [:5 HF 13 PATENTEBFEB 15 I972 SHEET OSUF 13 PATTERNING MECHANISM FOR MULTIFEED CIRCULAR KNITTING MACHINES This invention relates to patterning mechanism for multifeed circular knitting machines.
  • the invention is concerned with patterning mechanism of the general class having a selective action upon stitch forming or other appropriate elements of the machine requiring to be controlled or influenced for producing patterning effects in tubular knitted fabric.
  • multifeed is intended to be sufficiently broad to cover a circular knitting machine having a number of feeds which is large in relation to the cylinder diameter; it is primarily the intention to apply the invention to a so-called super multifeed machine having as many as, say, 48 or more feeds.
  • the invention has reference to a patterning system of a previously proposed character comprising, in combination, (a) elements movably mounted in tricks or grooves in a cylinder, said elements having butts and, in addition to being selectively movable heightwise and controlled or influenced by cams acting on the butts for producing patterning effects, being also capable of movement radially into their tricks or grooves towards the axis of the cylinder so as to initiate the selective actuation, (b) presser jacks arranged in the same tricks or grooves as, and in front of, either the elements (a) themselves or intermediate jacks between the presser jacks and the said elements, there being one presser jack to each such element or intermediate jack, as the case may be, and the stem of each presser jack being furnished with only one patterning butt, (c) rotary patterning units presenting circumferential series of radial teeth in superimposed planes for action on the patterning butts, one unit per feed, adapted to be driven in timed relation with the
  • the said rotary units are all in action and operative, so that immediately any particular presser jack is raised or lowered to dispose its single patterning butt at a height coincident with a plane containing a circumferential series of teeth, then if there is a tooth at the relevant location it will act on the said patterning butt and push the presser, and hence also the associated element, or the intermediate jack, back into its trick or groove with the result already described herein.
  • the elements of the machine to be controlled or influenced by the patterning mechanism of this invention will usually be either independent slidable needles, or associated jacks or sliders.
  • the purpose of the said patterning system is to determine the manner in which predetermined needles operate at relevant stations at desired times, e.g., as to whether such needles clear and knit, miss or tuck, and so on, according to patterning requirements.
  • the invention is primarily applicable to a multifeed circular knitting machine of the rotary needle cylinder type with a relatively stationary cam box, it would be possible to apply it to a rotary cam box type of machine with a stationary cylinder.
  • Each of the rotary units has actually consisted of a stack of superimposed discs each having at its periphery a circumferential series of prearranged radially extending teeth. Thus for half-gauging it has merely been necessary to slightly angularly offset alternate discs of each stack in order to achieve the desired arrangement of the teeth.
  • One aim of the present invention is to obviate the necessity to employ stacks of superimposed discs having at their peripheries prearranged radially extending teeth for action on the single patterning butts on the presser jacks.
  • a particular aim of the invention is to provide an improvement in a patterning system to enable wider pattern areas than heretofore to be produced on a multifeed circular knitting machine having a given number of feeds which is large in relation to the cylinder diameter.
  • each rotary patterning unit is a patterning system of the character concerned equipped for half-gauging consists of a rotary drum provided with teeth which protrude from its surface, the single patterning butts on the presser jacks are provided at a plurality of heightwise positions coincident with superimposed planes occupied by a corresponding number of coadjacent circumferential series of teeth on each rotary pattern drum and are regularly arranged around the cylinder in repeating series each of the same number of successive groups equivalent in number to half the number of heightwise positions, the butts in each group encompassing a circumferential distance around the cylinder equivalent to that covered by a rotary drum as it revolves one complete revolution during relative rotation between the cylinder and its cam box and being arranged alternately along two spaced-apart planes corresponding in their spacing with half the total overall height of the planes of teeth on the patterning drums.
  • each patterning unit consists of a rotary drum provided with teeth.
  • Such a unit is simpler to construct than a unit comprising superimposed toothed discs.
  • setting of a pattern by, e.g., removing selected teeth, is greatly simplified.
  • the pattern is set in two distinct halves corresponding with the upper and lower parts of the drum and the wider spacing of the teeth on the drum which results from this separation of the pattern halves greatly reduces the dangers of removing a wrong tooth.
  • each drum is intended to be vertically disposed, and is driven in precisely the same manner and from the same source as are the rotary stacks of discs heretofore provided. That is to say, each drum may conveniently have, rigid therewith, a shaft the lower end of which extends well below the drum and is mounted for rotation in one or more bearings provided on a suitable bracket, the lower extremity of the said shaft being furnished with a pinion arranged in mesh either with the cylinder or the cam box driving gear, as the case may be, or with an associated gear.
  • the single patterning butts on the presser jacks are also disposed in a similar way as before, and the teeth with which each drum is furnished correspond to the peripheral teeth on the discs previously provided.
  • each drum shall, if desired, be made with integral teeth. In such a case there would initially be full complements of the integral teeth in the respective superimposed planes, predetermined ones of the teeth in each plane being broken off, according to requirements.
  • each drum has formed therein a circumferential series of parallel, axially extending tricks or grooves in which are accommodated inserts furnished with the teeth.
  • Each drum insert may be initially formed along its length with a full complement of frangible teeth (corresponding in number to the total number of superimposed planes of teeth), those teeth which are not required being broken off. This construction of drum is, in practice, simpler to manufacture.
  • FIG. 1 is a vertical sectional view of so much of the head of a circular knitting machine of the rotary needle cylinder type equipped with a needle-actuating jack system as is necessary to illustrate the application thereto of a rotary patterning drum provided with teeth in superimposed planes for action upon single patterning butts on presser jacks included in the said jack system,
  • FIG. 2 is a detail vertical sectional view corresponding to the upper part of FIG. 1 showing a needle being raised by a needle-actuating jack,
  • FIG. 3 is a further detail vertical sectional view depicting the manner in which the needle-actuating jacks and hence also the intermediate swiveling jacks and the presser jacks are cam actuated in readiness for reselection,
  • FIG. 4 is a vertical sectional view similar to FIG. I but showing an alternative, and preferred, jack system wherein the action of pressing in a presser jack causes the corresponding needle to miss-knit,
  • FIG. 5 is a further detail sectional view corresponding to the upper part of FIG. 4 showing how in this case the intermediate swiveling jacks are acted upon by a withdrawal cam which suitable positions the said jacks for reselection,
  • FIG. 6 is a diagram showing four different forms of presser jacks for use in carrying out half-gauging
  • FIG. 7 is a diagram illustrating a particular presser jack patterning butt layout using presser jacks of the four forms set out in panels
  • FIG. 8 is a perspective view depicting a tricked or grooved rotary drum, comprising initially separate upper and lower sections, suitable for operating in conjunction with the butt layout shown in FIG. 7 in carrying out half-gauging,
  • FIG. 9 is a diagram of numbered teeth-containing planes facilitating the description of one particular sequence of shifting presser jacks upwards and downwards,
  • FIG. 10 is a perspective view of another form of tricked or grooved rotary drum made in one piece with the tricks or grooves extending in line from end to end thereof and showing also a drum insert with frangible teeth offset both to the right and to the left,
  • FIG. 11 is a presser jack patterning butt layout in respect of jacks having common height selection butts and in conjunction with which the drum shown in FIG. 10 can operate,
  • FIG. 12 is a further perspective view of a tricked or grooved rotary drum like that shown in FIG. 10 but having therein a drum insert with a different arrangement of offset teeth hereinafter to be described,
  • FIG. 13 is another presser jack patterning butt layout in respect of jacks having common height selection butts and in conjunction with which the drum shown in FIG. 12 can operate,
  • FIG. 14 is a detail plan view including a few presser jacks shown in relation to a rotary drum furnished with inserts having teeth offset both to the left and right,
  • FIG. 15 is a detail perspective view of presser jacks having single patterning butts offset to left and right,
  • FIG. 16 illustrates a bank of bolt cams constituting the variable presser jack positioning means for action on the common height selection butts shown in FIGS. 11 and I3 for the purpose of lifting and lowering jacks in any desired sequence or for bluffing such jacks at any predetermined height
  • FIG. 17 is a detail cross section, taken on the line XVII XVII of FIG. 16, of an annulus formed with horizontal buttlocating grooves,
  • FIG. 18-21 are diagrams illustrating how the bolt cams are mounted upon slides and associated one with another, the four views illustrating respectively different operational sequences brought about by certain of the said cams being moved to their in" positions,
  • FIGS. 22A and 2213 together constitute a sequence diagram illustrating the operation of the bolt cams for producing a nonmirror repeat design of full depth
  • FIG. 23 is a similar sequence diagram illustrating the operation of the bolt cams for producing a smaller nonmirror repeat design using an even number of pairs of drum insert teeth
  • FIG. 24 is a view similar to FIG. 23 but showing a sequence of bolt cam operations for producing a smaller nonmirror repeat design using an odd number of pairs of drum insert teeth
  • FIG. 26 depicts bolt cam settings to allow presser jacks to remain at any selected height for elongated patterns
  • FIG. 27 diagrammatically illustrates how information is read from a rotary drum, using one pair of drum insert teeth in both the bottom half and in the top half of the drum at a time
  • the rotary needle cylinder of the illustrated multifeed circular knitting machine is indicated at 50.
  • This cylinder has formed therein a circular series of axially extending tricks or grooves such as 51 in the upper end of each of which is accommodated an individually slidable latch needle 52.
  • Each such needle is furnished with an operating butt 53 adapted to be acted upon by needle-operating and controlling cams, such as 54 and 55, mounted in a stationary annular cam box 56 surrounding the rotary needle cylinder 50.
  • the base of the knitting head is indicated at 57 and the cylinder drive gear at 58.
  • each needle 52 there is provided a needle-actuating jack 59 which is fulcrummed at 59a, i.e., at its upper end.
  • a presser jack such as 60 (FIG. 1) which is fulcrummed at its lower end 60a and has on the front of its stern a single patterning butt 61.
  • the lower portion of the stern of each presserjack 60 is formed with six equally spaced and outwardly directed height selection butts 62.
  • an intermediate swiveling jack 63 which is fixed as regards any movement heightwise.
  • each presser jack 60 shown is one of four different forms of such jack provided in the machine as and for the purpose hereinafter to be described.
  • each presser jack is arranged in front of the corresponding swiveling jack 63.
  • the swiveling jacks 63 are fulcrummed at points between their upper and lower ends so that whenever a presser jack 60 is pressed in, the lower end 63a of the corresponding swiveling jack will also be swung inwardly to the back of the relevant cylinder trick or groove 51: as a consequence, and as shown in FIG.
  • the machine is provided, in advance of each feed, with a rotary patterning, i.e., selector, drum 67 presenting circumferential series of radial teeth 68 in superimposed horizontal planes for action on the single patterning butts 61 of the presser jacks 60.
  • a rotary patterning i.e., selector, drum 67 presenting circumferential series of radial teeth 68 in superimposed horizontal planes for action on the single patterning butts 61 of the presser jacks 60.
  • each presser jack 60 is selected and subsequently reselected by teeth 68 presented in the appropriate planes by the rotary patterning drums.
  • Each drum 67 in this example, has formed therein a circumferential series of equally spaced and axially extending parallel tricks or grooves in which are accommodated inserts 69 furnished with the teeth 68.
  • Each drum 67 has rigid therewith a shaft 70 the lower end of which extends well below the drum and is mounted for rotation in vertically spaced bearings 71 and 72 provided in a bracket 73. This is supported in a rebated portion of the knitting head base 57.
  • the lower extremity of the shaft 70 has secured thereto a pinion 76 arranged in mesh with a gear 77 which is rigidly attached, by screws 78, to the lower end of the needle cylinder 50.
  • the gear 77 is, in fact, interposed between the said cylinder and its drive gear 58.
  • the pressing in of a presserjack 60 by the action of a tooth 68 upon its single patterning butt 61, causes the corresponding needle 52 to knit.
  • the exact opposite may be, and preferably is, the case, i.e., the action of pressing in a presser jack 60 will cause the corresponding needle 52 to miss-knit.
  • the intermediate swiveling jackin this case designated 79-is fulcrummed at 80 at its lower end, so that whenever a presser jack 60, located in front of the swivelingjack, is pressed in, the upper end 79a of the swiveling jack 79 will also be swung inwards.
  • the said upper end 79a is in the form ofa two-pronged fork, the tail 590 of the needle-actuating jack 59 being located between the two prongs.
  • the inward movement -of the swiveling jack 79 will also cause the needle-actuating jack 59 to swing inwards and to withdraw its operating butt 59b from the jack camming track 65 thus causing its associated needle 52 to miss-knit. It follows that the needles associated with unselected jacks will knit.
  • this cam 81 on the upwardly projecting butts 79b is to restore those jacks 79 which were previously selected and pressed in to their outer position in readiness for reselection. Those jacks not selected will remain in the outer position. Since the tail 59c ofa needle-actuating jack 59 is located in the forked end 79a of the corresponding swiveling jack 79, the outward movement of the latter will also cause the needleactuating jack to move outwards thus bringing its operating butt 59b back into the jack camming track 65.
  • the elements to be controlled or influenced are again in the form of needle-actuating jacks placed beneath needles, but in this instance the jacks are provided with downwardly extending spring extensions which, whenever permitted to do so, move outwardly under the spring influence but are capable of being pressed back by the rotary patterning drums 67 into the relevant tricks or grooves 51 by the corresponding presser jacks 60.
  • the springy extension of a needle-actuating jack moves outwardly, a lower butt thereon engages with a jack-raising cam whereby the jack and hence also the corresponding needle is raised.
  • a jack extension selectively pressed inwards to miss the cam remains down.
  • the first of the four different forms of presser jacks 60 required has a single patterning butt 61 at a heightwise position (a), the second with a patterning butt at a slightly higher heightwise position (b), the heightwise space between the positions (a) and (b) being equal to the space between any two adjacent planes of insert teeth 68 on a rotary drum 67, and the third and the fourth with single patterning butts 61 respectively at lower and higher positions (c) and (d) well spaced above the positions (a) and (b).
  • the heightwise space between positions (c) and (d) is the same as between the positions (a) and (b) all as diagrammatically depicted in FIG. 6.
  • presser jacks of all these four forms have similar height selection butts 82 adapted to be acted upon by variable presser jack moving means for shifting the presser jacks upwards and downwards to varying desired extents to dispose their single patterning butts 61 opposite to teeth 68 in the relevant planes.
  • variable presser jack moving means for shifting the presser jacks upwards and downwards to varying desired extents to dispose their single patterning butts 61 opposite to teeth 68 in the relevant planes.
  • the alternate ones have their single patterning butts 61 at height (a) whereas the intervening ones have their patterning butts 61 at height (c).
  • the single patterning butts 61 of the presser jacks corresponding to the remaining 72 needles of the same panel alternate at heights (b) and (d).
  • the single patterning butts 61 in FIG. 7 are represented as solid black dots.
  • Each of the tricked or grooved rotary drums provided to operate in conjunction with the presser jack patterning butt layout shown in FIG. 7 may, as depicted in FIG, 8, comprises initially separate upper and lower sections 670 and 67b which are rigidly secured together to rotate together as a single drum 67. These sections 67a and 67b are coaxial and both of the same axial extent, i.e., height. Thirty-six equally spaced tricks or grooves are formed in and around each of these two sections, the tricks or grooves 67c in the upper section 67a being circumferentially offset in a half-gauge relationship with respect to those tricks or grooves 67d in the lower section 67b.
  • the inserts accommodated in all 72 tricks or grooves of the sectional drum 67 are identical. Predetermined ones of the insert teeth are, however, broken away according to patterning requirements.
  • the teeth left protruding radially from each of the upper and lower sections 670 and 67b of each rotary drum 67 are disposed in 24 superimposed horizontal planes.
  • the planes of teeth in the lower drum section 67b are arranged in pairs in an AB, AB, AB relationship to correspond with the patterning butt heights (a) and (b), whereas the corresponding 24 planes of teeth in the upper drum section 67a are similarly arranged in pairs in a CD, CD, CD relationship to correspond with the patterning butt heights (c) and (d).
  • the predetermined dispositions of teeth left on the inserts in the various horizontal planes vary as between one plane and another according to the pattern.
  • teeth on drum inserts accommodated in the lower section 67b of each rotary drum 67 are for action upon patterning butts 61 at heights (a) and (b), while teeth on inserts in the upper drum section 670 are for action upon patterning butts 61 at heights (c) and (d).
  • the horizontal insert teeth-containing planes are numbered 1-24, the AB pairs of such planes accordingly being numbered 1 and 2,3 and 4, 5 and 6, 7 and 8, 9 and 10, 11 and 12, and so on. It will also be assumed that, starting from the bottom of the upper drum section 67a and proceeding to the top thereof, the teeth planes are numbered 25-48, the CD pairs of planes thus being numbered 25 and 26, 27 and 28, 29 and 30, 31 and 32, 33 and 34, 35 and 36, and so on.
  • the patterning butts 61 at heights (a) and (b) will be opposite to the pair 1 and 2 of AB planes of insert teeth, whereas the patterning butts at heights (c) and (d) will be opposite to the pair 25 and 26 of CD planes of insert teeth.
  • This particular relationship can be sequentially changed from time to time by the variable presser jack moving means provided for shifting presser jacks 60 upwards and downwards to dispose the groups of patterning butts 61 at the aforementioned different heightwise positions opposite to predetermined pairs of teeth planes.
  • variable presser jack shifting means operate once per revolution of the needle cylinder 50 (in a gap where presser jacks 60, needle-actuating jacks S9 and needles 52 are left out of the cylinder).
  • Teeth planes numbered 1 and 2 and 25 and 26 select the first 144 needles of pattern.
  • the presser jacks 60 are raised so that the pattern butts 61 at (a) are opposite teeth plane No. 5 of the AB group, those at (b) are opposite teeth plane No. 6 of the same group, those at (c) are opposite plane No. 29 and those at (d) are opposite plane 30, both such planes being in the CD group, these conditions being maintained for one complete revolution of the needle cylinder 50.
  • the presser jacks 60 are lowered so that, during the next revolution of the cylinder 50, (a)s are level with 19, (b)s with 20, (c)s with 43 and (d)s with 44.
  • the presser jacks are then lowered again so that throughout the next revolution (a)s are level with 15, (b)s with 16, (c)s with 39, and (d)s with 40, and so on until the original conditions are restored, one pattern having been completed in readiness to start the next.
  • planes with teeth acting on such jacks in the course of being moved downwardly are represented by dotted lines.
  • the first way is by initially forming each drum insert 69 along its length with a full complement of frangible teeth half of which teeth, designated 68R, are offset to the right while the other half, designated 68L are offset to the left.
  • the teeth may be offset alternately to the right and left as shown in FIG. 12, the teeth offset to the right being capable of acting upon presser jack patterning butts 61 at heightwise position (a) or (c), FIG. 23, and the teeth offset to the left being similarly capable of acting upon patterning butts at heightwise positions (b) or (d), as the case may be.
  • the teeth in the lower half of the drum may be offset to one side while those in the upper half are offset to the other side; such an arrangement is shown in FIG. 10, the teeth 68R in the lower half of the drum being offset to the right and being capable of acting upon pressure jack patterning butts 61 at heightwise positions (a) or (b), FIG. 11, the remaining teeth 68L offset to the left being capable of acting upon patterning butts at heightwise positions (c) or (d).
  • the second way, producing the same result, is to employ flat drum inserts but to offset the single patterning butts 61 of the alternate and intervening presser jacks respectively to the right and left as shown in FIG. 15. In both arrangements the stern of each drum insert is lined up between two cylinder tricks 51.
  • each single-piece rotary drum 67 may have 36 equally spaced tricks or grooves 67c to receive inserts each initially having along its length 48 teeth; thus, in the case where insert teeth are offset, the lower 24 teeth 68R may extend to the right and the upper 24 teeth 68R may extend to the right and the upper 24 teeth 68L to the left of the central stem of each insert 69 (as shown in FIG. 10 or, to facilitate pattern reading. the initially full complement of 48 teeth on each insert may extend alternately to the right and to the left of the stem (as shown in FIG. 12).
  • each drum 67 is equipped with drum inserts 69 each of a form initially having along its length 48 superimposed frangible teeth ofiset alternately to the right and left as just-described reference to FIG. 12, then for half-gauging in these circumstances, the presser jacks 60 corresponding to the first 72 needles of each repeating series or panel of 144 needles around the cylinder are comparatively short ones having at their upper ends single patterning butts 61 at heights (a) and (b) for cooperation with the bottom 12 pairs of planes of insert teeth presented by each rotary drum.
  • the presser jacks corresponding to the second 72 needles of the said panel of 144 are longer ones having at their upper ends single patterning butts 61 at heights (c) and (d) for cooperation with the top 12 pairs of planes of insert teeth of each drum (see FIG. 13).
  • the first 72 jacks of each panel of 144 are, in fact, arranged with the patterning butts 61 at heights (a) and (b) in alternating relation, the butts at height (b), however, being at a slightly higher heightwise position that the butts (a) and the heightwise space between (a) and (b) being equal to the space between any two adjacent planes of insert teeth.
  • butts 61 at heightwise positions (c) and (d), i.e., they are in alternating relation, with butts at height (d) slightly higher than butts at height (c) and with the space between them equaling a space between any two planes of insert teeth.
  • the presser jacks 60 corresponding both to the first and to the second 72 needles of each repeating series or panel of 144 needles around the cylinder 50 are alternately short and long ones, the said short and long jacks of the first 72 having at their upper ends single patterning butts at heights (a) and (c) respectively, and the short and long jacks of the second 72 similarly having at their upper ends single patterning butts at heights (b) and ((1) respectively.
  • the butts at height (b) are spaced above the butts at height (a), and the butts at height (d) are spaced above the butts at height (0) a short distance equal to the pitch of the insert teeth-containing planes.
  • variable presser jack moving means for shifting presser jacks 60 upwards and downwards to dispose the groups of single patterning butts 61 at the aforementioned different heightwise positions opposite to the circumferential series of teeth in predetermined pairs of planes may, within the broad scope of the invention, consist of a height selection cam component (not shown) which is automatically movable up and down to varying desired extents, under the control of means operable once per revolution of the machine, and has formed in one side thereof a V-shaped notch adapted to provide, for action respectively upon upper and lower edges of single height selection butts e.g., 82, Fig. 6) provided on the presser jacks, downwardly and upwardly sloping cam edges both leading into a straight cam track portion.
  • a height selection cam component (not shown) which is automatically movable up and down to varying desired extents, under the control of means operable once per revolution of the machine, and has formed in one side thereof a V-shaped notch adapted to provide, for action respectively upon upper
  • the said cam component may be vertically movable up and down slidably within a slideway, or between suitable guides, and the desired movements of varying predetermined extents may be effected and controlled by an appropriately profiled rotary master cam through the medium of any suitable intermediate gearing.
  • variable presser jack positioning means preferably comprise, as illustrated in FIG. 16, a bank of bolt carns operable to lift or lower the presser jacks 60 in any desired sequence-or to bluff the said jacks at any predetermined height, the said bolt cams being arranged for action upon predetermined ones of a plurality of height selection butts 62 on each presser jack (see FIGS. 11 and 13), and the presser jacks being retained in the heightwise positions to which they are either lifted or lowered by virtue of the relevant height selection butts being led and passing into horizontal butt-locating grooves 85 and 86 formed in an annulus 87.
  • This annulus is, of course, gapped as at 88 at the location at which the bolt cams (advantageously disposed one above another at different heights) are provided.
  • each presser jack 60 is provided with six ofthe height selec tion butts 62 equally spaced apart one above the other.
  • cams Z and X identical to the cams Z and X respectively.
  • the needle cylinder 50 is assumed to rotate anticlockwise so that, on the diagram depicting the bolt cams, the presser jacks 69 travel from right to left (FIG. 16).
  • each of the bolt cams adapted to lift jacks will have an upwardly inclined edge for action upon the lower edges of height selection butts 62, whereas each bolt cam adapted to lower jacks will have a downwardly inclined edge for action upon the upper edges of such height selection butts.
  • the fixed annulus 87 having therein a gap 88 ofa circumferential extent equal to the length of the bolt cams, is formed with two horizontal grooves. The top of the upper groove 85 is coincident with the lowest point of the cam Y, and the bottom of the lower groove 86 is coincident with the highest point of the cam W.
  • the bolt cams are mounted upon slides each of which is movable to one of three positions, viz, an out" position 89, an in" position 90 and an intermediate neutral position 91 (see FIGS. 18-21). It is an essential requirement that it shall be impossible to have cams with differing actions in operation at any one time.
  • the cams X and X are linked and operate together. This also applies to the two cams Z and Z.
  • the slides 92 and 93 of cams X and Z, and also the slides 94 and 95 of cams X and Z have a pinion 96 interposed between them meshing with opposed series of rack teeth 97 and 98 on said slides.
  • the slides 99 and 100 of cams Y and W also have a pinion 101 interposed between them meshing with opposed rack teeth 102 and 103 on the slides.
  • each of the slides 92, 94, 93 and 95 of the four bolt cams X, X and Z, Z are provided with two spaced pins 104 and 105.
  • an arm 106 extending from the slides 99 of cam Y.
  • an arm 107 extending from the slide 100 of cam W, is located between the two pairs of pins 104, 105 on the slides 94 and 95 of cams X and Z.
  • FIG. 18 shows the conditions which exist when the bolt cam W is in its fully in position as will be seen rotation of the pinion 101 between the slides 99 and 100 of cams Y and W has ensured that the cam Y is in its fully out position 89.
  • the arms 106 and 107 on the slides 99 and 100 of the bolt cams Y and W have acted on pins 105 and 104 respectively to move the cams X and Z and X and Z all to the neutral position.
  • the two bolt cams X and X are both in their in" positions 90.
  • the pinions 96 have moved the slides 93 and 9S suchwise as to withdraw both of the bolt cams Z and Z to their fully out positions 89.
  • the pin 105 on the slide 92 of the cam X has acted upon the arm 106 to appropriately move the slide 99 to the extent and in the direction necessary to locate the cam Y in the neutral" position 91.
  • the pinion 101 between the slides 99 and 100 has turned to move the slide 100 to the extent of also positioning the cam W in its neutral position.
  • FIG. 20 depicts the conditions which exist when the cam Y is in its in position 90.
  • the pinion 101 has this time moved the cam W to its fully out position 89.
  • the arm 106 on the slide 99 has contracted the pin 104 on the slide 93 to move the cam Z to its neutral position 91.
  • the top pinion 96 has suitably moved the slide 92 to dispose the cam X in its neutral position.
  • the arm 107 on the slide 100 has contacted the pin 105 on the slide 94 and shifted the latter to dispose the cam X in its neutral position 91, and the bottom pinion 96 has burned to displace the slide to such an extent as to locate the cam Z also in its neutral" position.
  • this shows both of the bolt cams Z and Z in their fully in positions.
  • both of the pinions 96 have turned to move both of the cams X and X to their fully out" positions 89.
  • the pin 104 on the slide 92 of the cam X has acted upon the arm 106 and thereby moved the slide 99 suchwise as to dispose the cam Y in its neutral position.
  • the pinion 101 has also turned to move the slide to the extent and in the direction necessary to locate its cam W in the neutral position.
  • FIGS. 22A and 228 show the bolt cam operation requirements for a nonmirror repeat design of full length.
  • FIG. 22A shows the bolt cam operation requirements for a nonmirror repeat design of full length.
  • the single patterning butt 61 of each relevant presser jack is reading from No. 1 pair of planes AB of insert teeth, and the second height selection butt 62 down on each such presser jack 60 is about to be acted upon by the bolt cam W which will lift the jack two pitches.
  • the butt 61 is reading from No. 3 pair of insert-teeth-containing planes and the third height selection butt down is about to be acted upon by the cam W whereby the jack will At lifted a further two pitches.
  • the butt 61 is reading from N0. 5 pair of planes AB and the fourth height selection butt 62 down is about to be acted upon by the cam W with the same result.
  • the butt 61 is reading from No. 7 pair of teeth-containing planes AB and the fifth height selection butt is about to be acted upon by cam W.
  • butt 61 is reading from No. 9 pair of planes and the bottom height selection butt 62 is about to be acted upon by the cam W which thereupon acts to lift the presser jack two pitches for the fifth time from the start.
  • the cam W is moved out and the cams X and X in so that at the sixth stage, with the patterning butt 6] reading No. 11 pair of planes AB, the fourth height selection butt down is about to be acted upon by the cam X which acts to lift the presser jack to the extent one pitch only.
  • FIG. 23 shows the bolt cam operation requirements for producing a smaller depth nonmirror repeat design using an even number of pairs of drum insert-teeth-containing planes.
  • the example shown uses, in fact, only six pairs of such planes.
  • FIG. 23 To increase or decrease the number of planes used, bolt cams W AND Y are respectively operated a greater or less number of times.
  • the single patterning butt 61 reads at the first stage (i.e., start) from No. 1 pair of planes, from No. 3 pair of planes at the second stage; No. 5 at the third stage; No. 6 at the fourth stage; No. 4 at the fifth stage and No. 2 at the sixth stage-preparatory to No. 1 again at the starting position shown at the extreme left hand side of FIG. 23.
  • the cam W raises the presser jacks to the extent of two pitches twice; then the cam X raises such jacks one pitch; next the cam Y depresses the jacks to the extent of two pitches twice, and finally the cam Z depresses the jacks one pitch.
  • FIG. 11$ A procedure for producing a small depth nonmirror repeat design using an odd number of pairs of insert-teeth-containing planes is shown in FIG. 11$.
  • This further example shows the use of five pair of planes.
  • the cams W and Y are respectively operated a greater or less number of times.
  • the single patterning butt 61 at the first stage (start) reads from No. 1 pair of planes; from No. 3 pair of planes at the second stage; from No. 5 at the third stage; from No. 4 at the fourth stage, and from No. 2 t the fifth stage-preparatory to the presser jack 60 resuming its starting position shown at the extreme left of the FIG.
  • the cam W by action upon appropriate height selection butts 62, lifts the presser jacks two pitches twice; the two-pitch cam Y thereafter LOwers the jacks first to the extent of one pitch only and then to the extent of two pitches; finally, the cam Z lowers the iacks one pitch.
  • FIGS. 25A and 2513 illustrated together, illustrates a typical cam set-out for producing mirror-repeat designs. Only five pairs of teeth-containing planes are used, although this number can be increased or decreased by operating bolt cams X and W (for liftingjacks) and bolt cams Y and Z (for lowering jacks) a greater or less number of times.
  • the cams Z and X are utilized whenever presser jacks are lifted to a higher elevation than is shown in FIGS. 25A AND B. It is also to be noted that both of the two-pitch cams W and Y are employed to move the presser jacks to the extent of one pitch only.
  • the single patterning butt 61 for each relevant presser jack 60 reads No. 1 pair of planes at the first stage (start); No. 2 pair of planes at the second stage; No. 3 pair of planes at the third stage; No. 4 at the fourth stage; No. 5 at the fifth stage; and No. 2 at the eighth stagepreparatory to the present jack being restored to its starting position where the butt 61 against reads No. 1 pair of planes, and so on.
  • the bolt cam X first lifts the presser jack one pitch then the two-pitch cam W lifts the jack one pitch; next, first the cam X and then the cam W against which lifts the jack one pitch; thereafter the said jack is depressed four times each to the extent of one pitch respectively by the cam Y, the cam Z, the cam Y and the cam Z in that order by which time the presser jack is again at its staring position.
  • FIG. 26 The bolt cam settings to allow presser jacks 60 to remain at any selected height, for elongated patterns, are depicted in FIG. 26.
  • the cams X and X and Z and Z prevent presser jacks falling and also ensure that height selection butts 62 are fed accurately into the grooved annulus 87.
  • the two cams X and X are shown "in” with the presser jacks (whose patterning butts 61 are reading from any even-numbered pair of drum insertteeth-containing planes) passing straight through the cam system without being either lifted or lowered.
  • the two cams Z and Z are "in with the presser jacks (whose butts 61 are this time reading from any odd-numbered pair of planes) passing straight through the system.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US817930A 1968-05-03 1969-04-21 Patterning mechanism for multifeed circular knitting machines Expired - Lifetime US3641786A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2099568A GB1206225A (en) 1968-05-03 1968-05-03 Improvements in or relating to patterning mechanism for multi-feed circular knitting machines
GB6153268A GB1206226A (en) 1968-08-21 1968-08-21 Improvements in or relating to patterning mechanism for multi-feed circular knitting machines
GB3995868 1968-08-21

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US3641786A true US3641786A (en) 1972-02-15

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US (1) US3641786A (de)
CH (1) CH493667A (de)
DE (1) DE1921929A1 (de)
FR (1) FR2007781A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696641A (en) * 1970-01-21 1972-10-10 Precision Fukuhara Works Ltd Needle selecting means for knitting machines
US3696640A (en) * 1970-01-21 1972-10-10 Precision Fukuhara Works Ltd Variable needle selecting means for knitting machines
US3747371A (en) * 1970-09-11 1973-07-24 J Comas Pattern controls for circular knitting machines
US3771326A (en) * 1970-03-24 1973-11-13 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3791174A (en) * 1971-11-01 1974-02-12 Jumberca Sa Patterning mechanism for circular knitting machines
US3805554A (en) * 1970-03-24 1974-04-23 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3818723A (en) * 1971-06-28 1974-06-25 Stibbe Machinery Ltd Multi-feed circular knitting machine having an improved patterning mechanism
US4027503A (en) * 1973-07-25 1977-06-07 Riccardo Tenconi Pattern drum with pattern size increasing apparatus
US4242890A (en) * 1978-07-24 1981-01-06 Charles Seligson Striping box with more than one yarn finger activated at a time
CN102286840A (zh) * 2011-08-05 2011-12-21 浙江虎王数控科技有限公司 一种针织提花圆机挺针机构

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US2208698A (en) * 1936-06-29 1940-07-23 Hemphill Co Knitting machine
US2269288A (en) * 1938-09-17 1942-01-06 Saftlas Knitting machine
US2579161A (en) * 1950-10-02 1951-12-18 Whiting Hosiery Mills Inc Needle selector mechanism for knitting machines
US2808712A (en) * 1955-01-28 1957-10-08 Joseph L Morris Methods and means for creating patterns and controlling knitting changes
US3004413A (en) * 1960-05-04 1961-10-17 Scott & Williams Inc Knitting machine
US3077756A (en) * 1959-09-29 1963-02-19 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
GB996291A (en) * 1961-09-29 1965-06-23 Alfred Planck Improvements in or relating to circular knitting machines including pattern mechanisms
US3224227A (en) * 1963-05-24 1965-12-21 Martin Lahm Knitting machine
DE1230961B (de) * 1961-02-09 1966-12-22 Otto Nuber Mustervorrichtung fuer vielsystemige Rundstrickmaschinen
US3315494A (en) * 1964-01-05 1967-04-25 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
GB1113296A (en) * 1966-02-07 1968-05-08 Wildt Mellor Bromley Ltd Improved pattern selecting mechanism in circular knitting machines

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US2208698A (en) * 1936-06-29 1940-07-23 Hemphill Co Knitting machine
US2269288A (en) * 1938-09-17 1942-01-06 Saftlas Knitting machine
US2579161A (en) * 1950-10-02 1951-12-18 Whiting Hosiery Mills Inc Needle selector mechanism for knitting machines
US2808712A (en) * 1955-01-28 1957-10-08 Joseph L Morris Methods and means for creating patterns and controlling knitting changes
US3077756A (en) * 1959-09-29 1963-02-19 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3004413A (en) * 1960-05-04 1961-10-17 Scott & Williams Inc Knitting machine
DE1230961B (de) * 1961-02-09 1966-12-22 Otto Nuber Mustervorrichtung fuer vielsystemige Rundstrickmaschinen
GB996291A (en) * 1961-09-29 1965-06-23 Alfred Planck Improvements in or relating to circular knitting machines including pattern mechanisms
US3224227A (en) * 1963-05-24 1965-12-21 Martin Lahm Knitting machine
US3315494A (en) * 1964-01-05 1967-04-25 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
GB1113296A (en) * 1966-02-07 1968-05-08 Wildt Mellor Bromley Ltd Improved pattern selecting mechanism in circular knitting machines

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German Printed Application No. 1,230,961, Nuber, 12/66. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696641A (en) * 1970-01-21 1972-10-10 Precision Fukuhara Works Ltd Needle selecting means for knitting machines
US3696640A (en) * 1970-01-21 1972-10-10 Precision Fukuhara Works Ltd Variable needle selecting means for knitting machines
US3771326A (en) * 1970-03-24 1973-11-13 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3805554A (en) * 1970-03-24 1974-04-23 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3747371A (en) * 1970-09-11 1973-07-24 J Comas Pattern controls for circular knitting machines
US3818723A (en) * 1971-06-28 1974-06-25 Stibbe Machinery Ltd Multi-feed circular knitting machine having an improved patterning mechanism
US3791174A (en) * 1971-11-01 1974-02-12 Jumberca Sa Patterning mechanism for circular knitting machines
US4027503A (en) * 1973-07-25 1977-06-07 Riccardo Tenconi Pattern drum with pattern size increasing apparatus
US4242890A (en) * 1978-07-24 1981-01-06 Charles Seligson Striping box with more than one yarn finger activated at a time
CN102286840A (zh) * 2011-08-05 2011-12-21 浙江虎王数控科技有限公司 一种针织提花圆机挺针机构

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Publication number Publication date
CH493667A (de) 1970-07-15
FR2007781A1 (de) 1970-01-09
DE1921929A1 (de) 1969-11-27

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