US3615145A - Cam lock for flat knitting machine - Google Patents

Cam lock for flat knitting machine Download PDF

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Publication number
US3615145A
US3615145A US848513A US3615145DA US3615145A US 3615145 A US3615145 A US 3615145A US 848513 A US848513 A US 848513A US 3615145D A US3615145D A US 3615145DA US 3615145 A US3615145 A US 3615145A
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United States
Prior art keywords
stitch
cams
needles
transfer
cam
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Expired - Lifetime
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US848513A
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English (en)
Inventor
Ernst Goller
Wilhelm Hadam
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H Stoll GmbH and Co KG
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H Stoll GmbH and Co KG
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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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/36—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines
    • D04B15/362—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines with two needle beds in V-formation
    • D04B15/365—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines with two needle beds in V-formation with provision for loop transfer from one needle bed to the other

Definitions

  • This invention relates to knitting, and in particular it relates to locks of the type having cams for use in a flat knitting machine for effecting transfer of stitches from needles of either needle bed or plate to the needles of the opposed needle bed or plate.
  • the invention is particularly useful with flat knitting machines such as the Lamb type having means for automatically opening the hooks of needles advanced to stitch receiving stations.
  • the cams for advancing needles to stitch-transferring and stitch-receiving positions are variously constructed, but have heretofore always been so arranged that at any one location, there existed only one pair of opposed cooperating stitch transferring and stitch receiving cams.
  • Each stitch-transfer cam associated with one of the two needle beds is isolated and lies opposite to an isolated stitch-receiving cam associated with the other, i.e. opposed, needle bed.
  • stitch transfer cams are arranged respectively at the lefthand side of the front needle bed and the right-hand side of the rear needle bed, whereas corresponding stitchreceiving cams are arranged at the left-hand side of the rear bed and the right-hand side of the front lbed, respectively.
  • Such an arrangement of locks certainly provides the possibility of opening the hooks of stitch-receiving needles before a transference of stitches takes placeeither in the preceding course of knitting by means of stitches on the needle stems, or by any suitable hook or latch-opening elements.
  • the stitch transfer operation itself is limited by the prior arrangement in as much as the direction of transfer (i.e. from front to rear bed or vice versa) is dictated by the direction of travel of the cam carriage.
  • the improved lock comprises, on each needle bed, fboth stitch-transfer and stitch-receiving cams, these cams being so combined with needle-retracting cams as to provide between the cams two appropriately contoured channels or tracks for reception of needle butts, one channel being a stitch-transfer channel and the other being a stitch-receiving channel.
  • Each needle bed further includes switch cams which are movable into and out of operation suchwise as to permit selective passage of needle butts into one channel or the other so that needles are selectively advanced into their stitch-transfer or stitch-receiving positions, according to knitting requirements.
  • switch cams located at respectively opposite ends of the stitch-receiving channel or track, each of these cams, when operative, functioning to close the relevant end of the stitch-receiving channel and at the same time to direct and land needle butts into the stitchtransfer channel on to the appropriate edge of the stitchtransfer cam, according to the direction of travel of the cam carriage. But when withdrawn to their inoperative positions, the switch cams open the stitch-receiving channel, thereby permitting needle butts to pass along it, and at the same time making it impossible for the butts to he landed on to the stitch-transfer cam.
  • the switch cams are, therefore, in the nature of control and guide cams manipulation of which selectively determines which of the two channels is to be in use during any relevant traverse of the cam carriage either rightwards or leftwards.
  • the transfer lock associated with each needle bed of the machnie includes a central stitch-transfer cam with two spaced needle-advancing protuberances, the leading one of which moves needles for the purpose of spreading the stitches thereon to be transferred and the trailing one of which finally advances such needles to their transfer position irrespective of the direction of travel of the cam carriage.
  • This central cam in combination with needle-retracting cams flanking it, defines a stitch-transfer channel for reception of needle butts
  • the lock also including (a) displaceable stitch-receiving cams which, when operative define in combination with the central stitch-transfer cam a stitch-receiving channel for reception of and action upon needle butts to advance needles to their stitch-receiving positions and ('b) displaceable switch cams which are located at the ends of the stitch-receiving channel and are operable to control passage of needle butts into one channel or the other selectively.
  • FIG. 1 is a diagrammatic plan view of two opposed stitch transfer locks of the present invention showing the paths taken by needle butts when the cam carriage of the machine is making a stroke in the direction of the arrow from right to left and stitches are in the course of being transferred from needles in the front (lower) bed to needles in the rear (upper) bed.
  • FIG. 2 is a similar view of the same locks depicting the needle butt paths when the carriage is travelling from left to right and a transfer of stitches is again being made from front bed needles to rear bed needles.
  • FIG. 3 is a plan view corresponding to that of FIG. 1 illustrating the combination, with the opposed transfer locks for action directly upon needles, of jack cam systems also similarly capable of effecting stitch transference from desired needles through the medium of associated jacks.
  • FIG. 4 is a plan view similar to FIG. 3 but with the cam carriage travelling rightwards instead of leftwards.
  • each of the two opposed transfer locks comprises a central stitch transfer cam 1 formed with two spaced needleadvancing protuberances 2 and 3.
  • This central cam 1 is flanked, at opposite sides thereof, with two oppositehandled needle-retracting cams 8 and 8'.
  • the cam 1 and the two cams 8 and 8' define between them an appropriately contoured stitch-transfer channel 6 for reception of needle butts N.
  • each lock Below the central stitch-transfer cam of each lock is a pair of separate but opposite-handed stitch-receiving cams 5 and 5 each of which is of the movable bolt type so that it can be either projected inwardly into an operative (unshaded) position or withdrawn to an inoperative position (depicted by shading).
  • the lower edge of the cam 1 and the opopsed upper edges of the two cams 5 and 5' define between them an appropriately contoured stitch-receiving channel 7.
  • the two channels 6 and 7 are accordingly at respectively different levels and extend very approximately parallel to one another.
  • switch cams 4 and 4' in association with the stitch-transfer cam 1 and the two stitch-receiving cams 5 and 5, two movable switch cams 4 and 4.
  • These switch cams 4 and 4' are of the bolt type and thus either projectible into operative (unshaded) positions or withdrawable to inoperative (shade) positions, according to requirements.
  • the switch cams 4 and 4' are, in fact, movable under control such as to permit of selective passage of needle butts N etither into the channel '6 or into the channel 7 so that needles in the beds are selectively advanced into their stitch-transfer or stitch-receiving positions, according to knitting requirements.
  • both of the switch cams 4 and 4' are in their operative positions to close the stitch-receiving channel 7, the cam 4 functioning at the same time to direct and land needle butts N on to the left-hand edge of the central stitch-transfer cam 1 so that these butts then pass along the channel 6 as the cam carriage travels leftwards; in FIG. 2., where the carriage is travelling rightwards, the cam 4' similarly functions to direct and land needle butts N on to the righthand edge of the cam 1. But in the rear, i.e. upper, lock in each of FIGS.
  • both switch cams 4 and 4 are withdrawn thereby opening the stitch-receiving channel 7 and permitting needle butts N to pass along it in either direction, depending on the direction of the traverse of the cam carriage, the said cams 4 and 4 at the same time making it impossible for the butts to be landed on to the stitch-transfer cam 1.
  • the leading protuberance (2 in FIGS. 1 and 3 in FIG. 2) initially advances the needles in the front bed to their maximum projected position.
  • the stitches on these front needles are laterally spread and thus opened out in readiness for penetration by the op posed receiving needles in the rear bed.
  • the fully advanced needles are withdrawn slightly and are only subsequently and finally advanced into their transfer position by action upon their butts N of the trailing protuberances (3 in FIGS. 1 and 2 in FIG. 2.).
  • the operative stitch-receiving cam of the rear bed always lies opposite to the trailing protuberance of the transfer cam 1, the stitch transfer taking place in known fashion at this particular location.
  • the receiving needles in the rear bed remain in readiness while the stitches on the front needles are being spread (as a consequence of advance of the last mentioned needles by the leading protuberance of cam 1), the said receiving needles being finally advanced to take the spread stitches only as their butts pass along the second half of the channel 7.
  • FIG-S. 3 and 4 there is illustrated a developed construction of the front and rear lock systems including switch cams 4" and 4 and pairs of opposite-handed stitch-receiving cams 5" and 5" all for action upon needleactuating jacks ST, as well as a feed cam 9 disposed below such additional cams for action upon auxiliary jacks H.
  • Such a developed version of the look construction according to the invention provides the possibility of transferring, simultaneously and selectively, stitches from needles in the front needle bed to needles in the rear bed, and also from needles in the rear bed to needles in the front bed-during carriage strokes in either direction. This is achieved by virtue of the fact that during a carriage stroke from right to left (FIG. 3) and also during a carriage stroke from left to right (FIG. 4), the cams 4, 5 and 4', 5' of both of the opposed needle locks can be rendered inoperative as indicated by the shaded parts in both of these figures.
  • the leading switch cams 4" in FIG. 3 and 4" in FIG, 4 and the subsequent stitch-receiving cams 5' in FIG. 3 and 5" in FIG. 4 are in operation at any time.
  • the selected jacks ST that is to say the ones brought into the range of their switch cams 4" and 4" are projected out of each needle bed to advance their associated needles into the range of the central stitch-transfer cam 1 and thus into the stitch transfer position.
  • the selected auxiliary jacks H are projected by the feed cam 9 to advance the butts N of the associated needles into the stitch-receiving position, through the medium of their associated jacks ST and the trailing stitch-receiving cams 5 or 5" depending upon the direction of carriage travel-the stitch transfer then taking place in the manner hereinbefore described.
  • each lock of each bed includes means, including a set of cams, for guiding needles to either transfer or receive stitches, and for accomplishing said transfer or receiving of stitches for either direction of travel of the locks relative to the needle bed, said set of cams including a stitch-transfer cam, a needle retracting cam, and a stitch receiving cam, a stitch transfer channel formed by said stitch-transfer cam and said needle retracting cam for guiding needles which transfer stitches, and a stitch-receiving channel formed by the stitch-transfer cam and the stitch-receiving cam for guiding needles which receive stitches; and including two switch cams located one at each end of the stitch receiving channel, each switch cam being movable between a first position and a second position, and wherein in the first position each switch cam permits movement of the needles into said stitch receiving channel and in the second position, the switch cam permits movement of
  • said stitch-transfer cam includes, on the edge thereof forming the stitchtransfer channel, two spaced needle advancing protuberances, including a leading protuberance to move the needles for spreading the stitches thereon to be transferred and a trailing protuberance for finally advancing said needles to their transfer position, the said protuberances being operative as said leading and said trailing protuberances regardless of the direction of relative movement between the needles and the locks.
  • said stitch-receiving cam comprises a pair of stitch-receiving cams in each look and located side-by-side to define one side of said stitch-receiving channel, and wherein said stitch-receiving cams are each associated with one of said protuberances on the opposed lock, and wherein either of said stitch-receiving cams can be rendered operative, and the. other inoperative, depending upon the direction of relative movement between .the needles and the bed.
  • each of said locks includes a further set of switch cams and a further set of opposite-handed additional stitch-receiving cams associ ated with said further set of switch cams, said further stitch-receiving cams being movable between an operative and an inoperative position, such that when operative, the stitch-receiving cams act upon needle-actuating jacks as the looks and the needles move relative to each other.
  • each said lock being characterised in that it includes a central stitch-transfer carn with two spaced needle-advancing protuberances, a leading one of which moves needles for the purpose of spreading the stitches thereon to be transferred and a trailing one of which finally advances such needles to their transfer position irrespective of the direction of travel of the cam carriage, this central cam, in combination with needle-retracting cams flanking it in both directions, defining a stitch-transfer channel for reception of needle butts, the look also including (a) displaceable stitch-receiving cams which, when operative, define in combination with the central stitch-transfer cam a stitch-receiving channel for reception of and action upon needle butts to advance needles to their stitch-receiving positions and (b) displaceable switch cams which are located at the ends of the stitch-receiving channel and are operable

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Sewing Machines And Sewing (AREA)
US848513A 1968-08-09 1969-08-08 Cam lock for flat knitting machine Expired - Lifetime US3615145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1785099A DE1785099C3 (de) 1968-08-09 1968-08-09 ScMoe für Flachstrickmaschine!! zum Umhängen von Maschen von den Nadeln des einen auf die des anderen Nadelbettes

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US3615145A true US3615145A (en) 1971-10-26

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US848513A Expired - Lifetime US3615145A (en) 1968-08-09 1969-08-08 Cam lock for flat knitting machine

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US (1) US3615145A (de)
CH (1) CH504562A (de)
DE (1) DE1785099C3 (de)
FR (1) FR2015353A1 (de)
GB (1) GB1215678A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012927A (en) * 1974-09-10 1977-03-22 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Loop transferring cam system for flat knitting machines
US4154067A (en) * 1976-05-18 1979-05-15 Veb Wirkmaschinenbau Karl-Marx-Stadt Cam slides capable of effecting loop transfer in two opposite directions during cam slide travel in a single direction
US4287727A (en) * 1979-06-18 1981-09-08 Tatsumi Seiki Co., Ltd. Flat bed knitting machine
US4294085A (en) * 1978-10-03 1981-10-13 Bentley Alemannia Limited Flat bed knitting machines
US4463578A (en) * 1981-09-30 1984-08-07 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Single or multiple cam unit for knitting machines
US4463579A (en) * 1981-09-30 1984-08-07 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Double cam unit for knitting machines
US4474037A (en) * 1982-05-27 1984-10-02 Universal Maschinenfabrik Knitting-transfer cam unit for V-bed flat knitting machines with slider needles
US4545219A (en) * 1983-09-21 1985-10-08 H. Stoll Gmbh & Co. Single or multi-cam system for flat-bed knitting machines
US4555917A (en) * 1983-07-27 1985-12-03 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co., Kg Combined knitting-transfer cam unit for V-bed flat knitting machines with slider needles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000868A1 (en) * 1979-10-01 1981-04-02 Bentley Alemannia Ltd Flat bed knitting machine and transfer systems therefor
JPS591750A (ja) * 1982-04-28 1984-01-07 株式会社島アイデア・センタ− 横編機
DD215345A1 (de) * 1983-05-09 1984-11-07 Elite Diamant Veb Maschenumhaengevorrichtung fuer flachstrickmaschinen mit nadelantrieb durch kurbeln

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012927A (en) * 1974-09-10 1977-03-22 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Loop transferring cam system for flat knitting machines
US4154067A (en) * 1976-05-18 1979-05-15 Veb Wirkmaschinenbau Karl-Marx-Stadt Cam slides capable of effecting loop transfer in two opposite directions during cam slide travel in a single direction
US4294085A (en) * 1978-10-03 1981-10-13 Bentley Alemannia Limited Flat bed knitting machines
US4287727A (en) * 1979-06-18 1981-09-08 Tatsumi Seiki Co., Ltd. Flat bed knitting machine
US4463578A (en) * 1981-09-30 1984-08-07 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Single or multiple cam unit for knitting machines
US4463579A (en) * 1981-09-30 1984-08-07 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Double cam unit for knitting machines
US4474037A (en) * 1982-05-27 1984-10-02 Universal Maschinenfabrik Knitting-transfer cam unit for V-bed flat knitting machines with slider needles
US4555917A (en) * 1983-07-27 1985-12-03 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co., Kg Combined knitting-transfer cam unit for V-bed flat knitting machines with slider needles
US4545219A (en) * 1983-09-21 1985-10-08 H. Stoll Gmbh & Co. Single or multi-cam system for flat-bed knitting machines
US4616488A (en) * 1983-09-21 1986-10-14 H. Stoll Gmbh & Company Single or multi-cam system for flat-bed knitting machines

Also Published As

Publication number Publication date
CH504562A (de) 1971-03-15
DE1785099B2 (de) 1974-06-06
DE1785099A1 (de) 1971-05-13
DE1785099C3 (de) 1975-01-23
FR2015353A1 (de) 1970-04-24
GB1215678A (en) 1970-12-16

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