US3890808A - Device on a flat knitting machine for inserting a design - Google Patents

Device on a flat knitting machine for inserting a design Download PDF

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Publication number
US3890808A
US3890808A US497785A US49778574A US3890808A US 3890808 A US3890808 A US 3890808A US 497785 A US497785 A US 497785A US 49778574 A US49778574 A US 49778574A US 3890808 A US3890808 A US 3890808A
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US
United States
Prior art keywords
thread
guide
lock
movement
design
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US497785A
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English (en)
Inventor
Heinz Zullig
Robert Leutwyler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Madag Maschinen und Apparatebau Dietikon AG
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH1202873A external-priority patent/CH580185A5/de
Priority claimed from CH256574A external-priority patent/CH585298A5/xx
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3890808A publication Critical patent/US3890808A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/56—Thread guides for flat-bed knitting machines
    • 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 ; Programme-control arrangements
    • D04B15/80—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the thread guides used
    • 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
    • D04B15/08—Needle latch openers; Brushes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B7/00—Flat-bed knitting machines with independently-movable needles
    • D04B7/08—Flat-bed knitting machines with independently-movable needles for domestic use

Definitions

  • PATENTEIJJUN24 ms SHEET FIGS a PATENTEDJUN 24 1915 3. 890 8 O8 SHEET 7 PATENTEDJUN 24 1915 F1G.10a
  • the present invention relates generally to knitting machines and more particularly to a device in a flat knitting machine for inserting a design thread.
  • Another object of the present invention is to provide a device of simple and economical construction which can be utilized in flat knitting machines in which the passage of the design thread near the main thread can be eliminated.
  • the foregoing and other objects are attained by providing two hold-back agents for a taut design thread, the holdback agents being arranged on both sides of the nut in the direction of movement of the fastening lock and connected by a selector shaft guide that passes by the nut. Apparatus is also provided for freeing the design thread from the hold-back agents depending upon the direction of movement of the lock.
  • the auxiliary nuts are swiveling gripping hooks one of which being in front according to the direction of movement the lock is rotated into a working position in which it catches the design thread stretched over the thread guide, while the hind gripping hook is swiveled into a freeing position.
  • FIG. I is a perspective view of the needle board with the movable lock and thread holder of a first embodiment of the present invention
  • FIG. 2 is a plan view of the lock of FIG. I in enlarged scale
  • FIG. 3 is a front view of the lock of FIG. 2 partly cut away;
  • FIG. 5 is a plan view of the lock of a second embodiment of the present invention.
  • FIG. 6 is a partly broken away front view of the lock of FIG. 5;
  • FIG. 7 is a sectional view along line VIIVII of FIG. 5 on an enlarged scale
  • FIG. 8a is the right side of a plan view of a third embodiment of the present invention.
  • FIG. 9 is the left side of a sectional view along the line IXIX of FIGS. 8 and 10;
  • FIG. 9a is the right side of a sectional view along line IXIX of FIGS. 8 and 10;
  • FIG. 10 is the left side of a bottom view of the present invention.
  • FIG. 10a is the right side ofa bottom view of the present invention.
  • FIG. 11 is the left side of a sectional view along line XIXI of FIG. I0 in the first position of the control instruments, without a coupling instrument;
  • FIG. :1 is the right side of a sectional view along line XIXI of FIG. 10 in the first position of the control instruments, without a coupling instrument;
  • FIGS. 12 and 13 show sectional views as in FIG. II, through the back part of the device in relation to the lock direction of movement, with the control instruments in a second and third position;
  • FIG. 14 is a bottom view of the coupling instrument
  • FIG. 15 is a sectional view along line XV-XV of FIG. 10;
  • FIG. 16 is a sectional view along line XVIXVI of FIG. 10;
  • FIG. I7 is a front view of the sequence switch cam on an enlarged scale.
  • FIG. I8 illustrates an auxiliary nut
  • an upper cover plate 4 of the lock 2 has a notch 5 in the middle of the front side thereof, into which the nut 6 of the main thread 7 is fitted according to customary methods.
  • Behind notch 5 in the cover plate 4 there is a selector shaft guide 10 that connects two perforations 8 and 9.
  • the two recesses are arranged in the axis of the movement directions of the lock (see arrow A in FIG. I) on both sides of the notch 5 or the nut 6.
  • a base plate 11 and I2 is fastened, movable on the underside of the cover plate 4, in the direction of movement ofthe lock 2.
  • a hold-back agent in the form of a guide socket l3 and I4 is fastened to each base plate 11 and 12.
  • the guide socket passes through the corresponding perforation 8 or 9 and extends over the surface of the cover plate 4.
  • Each guide socket 13 or 14 includes a plate essentially bent into a U-shape, with an upper edged beading 15.
  • the two sockets are arranged in the corresponding perforations 8 and 9 in such a way that the closed sides of the U-shape face one another, and the conducting channels 16 and 17 formed by these U-shapes are at least approximately at an equal distance from the front edge of the cover plate 4 as the main thread nut 6. Furthermore, the two channels I6 and 17 are inclined downward toward one another.
  • each guide socket I3 and 14 form two gripping arms I8 and 19 or 20 and 21 for the design thread 22, such that the hind arms 19 and 20 partly extend into the corresponding perforations 8 and 9 when the selector shaft guide is lengthened.
  • an activation bolt 25 is arranged axially and movably, with a spring around the portion thereof that is located between the two sockets 23 and 24.
  • the spring 26 is braced on one side against the front socket 23 and on the other side against a guide ring 27 that is attached fixedly to the bolt 25, such that the bolt 25 can be moved forward in opposition to the effect of the spring 26 and then pushed back into the back position, shown in FIG. 4, by the spring 26.
  • the front end of the activation bolt 25 is hinged to the one-armed lever 28 which in turn is fixed to the cover plate 4 by means of the axis 30 that passes through the forward slot 29.
  • Axis 30 is in turn connected with a swiveling ejector lever 31 that is located in a plane above that of the upper edge of the guide sockets.
  • the arrangement is such that when the activation bolt 25 is moved forward and thus swivels the ejector lever 31, this swiveling motion grasps a design thread located in the channel 16 or 17 and lifts it out of the channel.
  • the design thread 22 is on the outer side of the ejector lever 31, and the arrangement is such that when the tip of an ejector lever 31 reaches the outer edge of the back gripping arm 19 or 20 and thus ends its swiveling movement, its position is still inclined toward the nut 6.
  • the ejector lever 31 grips the design thread 22 that has been pulled through the appropriate channel 16 or 17 and lifts it out of the channel until, at the end position of the swivel movement, it is lying on the outer side of the ejector lever that is inclined toward the forward edge of the lock. Proceeding from the assumption that the lock in FIG. 1 has just completed a movement from right to left, then the lock too is located on the left side of the thread guide 3. The consequence of this is the fact that the design thread 22 is being pulled toward the right, due to which fact it is lifted off the ejector lever and pulled along the back edge of the selector shaft guide into the perforation 9 such that, as soon as the slide movement in the opposite direction begins, the design thread 22 is caught in the guide socket 14.
  • the second embodiment shown in FIGS. 5 through 7 is different only insofar as the two perforations 8a and 9a are oblong in form.
  • the hold-back agents are gripping elements 33 and 34, which consist each of a stationary wedge 35 and 36 and a movable, two-armed lever wedge 37 and 38.
  • the two movable wedges 37 and 38 swivel on the stationary wedges 35 and 36, while the stationary wedges 35 and 36 are fastened movably on the underside of the cover plate 40, moving the direction of movement of the lock, and are guided by bolts 40 that project downward from the cover plate and pass through the longitudinal slits 39.
  • one (42 and 44) has a hooklike projection 45, while the other 35 and 36 has a notch 46 that serves as a hold-back for a nut 47, depending upon the relative position of the two wedges of a gripping element 33 or 34; the design thread is pulled through the nut.
  • each movable wedge 37 and 38 there is a spring-loaded ball 48 in an appropriate socket 73, which operates together with three projections 49-51 or 52-54 on the upper side of the stationary wedges 35 and 36 in the sense of a snap device in such a way that the movable wedge can be swiveled out of one of the three positions formed by the projections only by overcoming the pressure of the spring.
  • the two hind arms (41, 43) of the movable wedge (37, 38) are connected by means of a telescopic bar 55, whereby between the two bar parts 56 and 57, that fit into each other, there is a spring-loaded snapping device, that is not shown in the figures, which guarantees a connection between the two bar sections in two different, opposite positions.
  • control crank 58 or 59 On both sides of the insertion device there is a control crank 58 or 59 that can be moved along the board 1 and fastened into a certain position by suitable means, with two opposite movable surfaces 60 and 61 or 62 and 63 as well as corresponding butting faces 64 and 65 or 66 and 67.
  • the mode of operation of the insertion device of this second embodiment is such that the nut 47, with the design thread 22, is placed in the hold-back socket that is in front depending upon the direction of movement of the slide, i.e., is inserted into the hold-back socket 36/38 in the case of an assumed direction of movement along arrow b in FIG. 5.
  • the appropriate gripping element is located in contact position in which the ball 48 enters the notch 52.
  • the movable wedge 37 of the hind gripping element, connected by means of the bar 55 with the wedge 38, is in release position, in which the appropriate wedge 37 has reached the extreme position in this swivel movement in the clockwise direction, and its ball 48, is in the notch 49.
  • the angular frame consists essentially of a top plate 101 and a front plate 102 which is to be attached to a lock of a knitting machine that is not shown in this figure.
  • the top plate 101 has slits 103 for fastening screws that are not shown, as well as a window 104 for the activation rib 105 of the sequence switch cam 106, and finally a selector shaft guide 107, arranged symmetrical on the geometric transverse axis, for the design thread.
  • the design thread is bounded on the back side by a ridge 108 that faces the unrepresented lock, and on the front by two curved edges 109, whereby both of these edges, together with the front edge 110 of the top plate 101 form two wings 114 separated by the thread passage 113 that is bridged by the fastening piece 1 ll of the threaded nut 112.
  • the front plate 102 has a complete perforation 115 in the center thereof, which perforation tapers as it continues through the top plate 101 and finally forms the thread passage 113.
  • Two identical carriers 116 are screwed onto the bottom of the top plate 101, symmetrical to the geometric frame transverse axis.
  • Each of these carriers 116 gas a perpendicularly curved guide edge 117 along the back edge thereof, with a slot 118, and along the front edge thereof a diagonally curved trestle 119 with a diagonal edge section 120 that projects at the front.
  • the edge sections 120 of the two trestles 122 are facing each other, and each have an arm 121 that stretches toward the other, which arm ends in a flap plate 122 with a slot 123.
  • the top plate 124 of the angular control frame 125 is fastened to the bottom of the thread passage.
  • the front plate 126 of the guide frame is fastened to the bottom of the thread passage.
  • the sequence switch cam 106 which is perpendicular to the top plate 124, supports on the one hand the pivot pin 127, located in the plane of symmetry of the frame 100, for the sequence switch cam 106, and on the other is penetrated by two symmetrically arranged selector shaft guides 128.
  • the sequence switch cam 106 can be stopped in three positions, and has three notches 129-131 on the back thereof for fastening it into these positions.
  • the positioning spring 132 screwed onto the bottom of the top plate catches with these notches.
  • the sequence switch cam 106 On the same radius as the notch 130, which is intended for the middle position, the sequence switch cam 106 has a bump 133 (FIG.
  • the second arm 136 is connected such that it swivels with the guide rod 138, which is in turn attached to the one-armed coupling lever 139 that rotates around the axis 140.
  • the axis 140 is located atop the disk 141 parallel to the top plate 124, through which disk two guide slots 142 of guide bolts 143 attached to the top plate penetrate. The bolts 143, in the middle position of the sequence switch cam 106 illustrated in FIG.
  • the positioning spring in which the positioning spring is located in the notch 130, are located in the center of their corresponding slots 142.
  • the disk 141 has two feet 163 projecting over the front edge thereof, which feet pass through the selector shaft guides 128 into the front plate 126 of the guide frame 125.
  • one end of the spring 144 is anchored in the disk 141 which the other end thereof grasps the coupling lever 139 and attempts to move it clockwise, as shown in FIG. 10.
  • the coupling lever 139 On the free end thereof, the coupling lever 139 has a slot 145 through which the pin 146 mounted on the disk 141 passes and thus limits the rotating movement caused by the spring 144.
  • the sequence switch cam 106 has two selection shaft guides 149 and 150, into each of which a guide pin 151 fits.
  • Each guide pin rises toward the back from the end of one of two opposite guide levers 152 located on the axis of the design device, whereby the other end of each of the guide levers 152 supports another pin 153, that fits into the slot 118 of the corresponding guide flap 117 and rotates around an axis 154 fastened onto the front plate 126 of the guide frame 125.
  • each guide lever 152 serves as the guide for a toothed rack 156, through the slots 157 and 158 of which an axis 154 and a pin 155 pass, such that each toothed rack 156 is arranged so that it moves along the guide lever 152 assigned thereto.
  • Each of these toothed racks 156 controlled by a retracting spring 159, the other end of which is fastened to the stationary pin 154.
  • the end of each toothed rack 156 is the toothed part 160, which meshes the corresponding toothed part of an auxiliary nut 161 fastened rotatingly on the guide lever 152.
  • Each auxiliary nut 161 has a gripping hood 162 (see FIG.
  • each toothed rack 156 has an inside and an outside shoulder 164 and 165, whereby the inside shoulders 164, undisturbed by the swivel position of the appropriate guide lever 152, cooperate with one of the feet 163, while the outside shoulders 165 reach the area of an arm 166 ofa brush-swivel de vice that is yet to be described only when the guide lever 152 is in the upper swivel position (see FIG. 13).
  • the coupling lever 139 is moved sideways in the direction of movement of the lock by the lock, through the coupling element 148, then there is a movement of the disk 141 in the same direction, which is transmitted by the foot in front depending on the direction of movement and the corresponding inside shoulder 164, to the toothed rack 156. Since the guide lever 152, depending upon the position of the sequence switch cam 106, is located in the lower position thereof, the arm 166, and thus the brush-swivel device yet to be described are not affected by this movement.
  • the toothed rack 156 Upon a reversal of the locks direction of movement, upon which the coupling element 148 and with it the disk 14] are moved in the opposite direction, the toothed rack 156, that has so far been in front in the direction of movement, is pulled back by the corresponding spring 159, such that the auxiliary nut 16] cooperating with the corresponding toothed rack 156 is rotated back and the corresponding gripping hook 162 is swung into the release position.
  • the disk 14] and the toothed rack that is now in front in the new direction of movement rotates the auxiliary nut 161 and gripping hook assigned to it 162 are rotated into the operating position.
  • the gripping hook 162 that is in front depending upon the direction of movement is always in the operating position, and the back one is always in the release position.
  • the sequence switch cam 106 when the sequence switch cam 106 is in one of the positions indicated in FIG. 12 or FIG. 13, the design thread then automatically jumps into whichever hook 162 is in front at each reversal point of the slide movement and thus, regardless of the slide movement, is always in front of the normal thread. If, on the other hand, the sequence switch cam 106 is rotated into the middle position, as in FIG. 11, in which the coupling with the element 148 of the lock is released, then there is no movement of the gripping hooks 162. In the case of normal knitting, the device is inoperative in this position.
  • the guide pins 151 were swung into their lowest position by the corresponding form of the guide grooves 149 and 150 on the front of the sequence switch cam 106, which results in the fact that the ends of the guide lever 1S2 facing outward are in their upper position, in which not only the inside shoulders 164 of each toothed rack 156 cooperate with the corresponding foot 163, but also, the outside shoulders 165 can become active in the sense that they extend to the swivel path of the arm 166 of the guide lever 168 of the brush-swivel device. Due to the effect of the coupling element 148 ofthe lock, the disk 141 is also pushed forward in the appropriate direction of movement when the sequence switch cam 106 is in this position (web design position).
  • the two gripping hooks 162 are rotated upon each reversal in such a way that the design thread jumps to the gripping hook that is in front in relation to the new direction, and the holdback brush 174 that is in front in relation to the lock direction is also swung into its operating position.
  • each holdback agent is a guide socket whose cross-sections are approximately U-shaped, whereby the closed ends of the guide sockets face each other.
  • holdback agents are forcibly controlled gripping elements and have both a stationary and a movable wedge, between which a nut through which the design thread passes is held in resistance to the pulling tension of the design thread.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US497785A 1973-08-21 1974-08-19 Device on a flat knitting machine for inserting a design Expired - Lifetime US3890808A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1202873A CH580185A5 (en) 1973-08-21 1973-08-21 Flat knitter patterning yarn guide - has slit in slide ranging round central guide for the basic yarn
CH256574A CH585298A5 (en) 1974-02-22 1974-02-22 Flat knitter patterning yarn guide - has slit in slide ranging round central guide for the basic yarn

Publications (1)

Publication Number Publication Date
US3890808A true US3890808A (en) 1975-06-24

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ID=25690787

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Application Number Title Priority Date Filing Date
US497785A Expired - Lifetime US3890808A (en) 1973-08-21 1974-08-19 Device on a flat knitting machine for inserting a design

Country Status (8)

Country Link
US (1) US3890808A (cs)
JP (1) JPS5424494B2 (cs)
AR (1) AR206325A1 (cs)
AT (1) AT342176B (cs)
BR (1) BR7406903D0 (cs)
ES (1) ES429433A1 (cs)
FR (1) FR2241643B1 (cs)
IT (1) IT1020044B (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9423406D0 (en) * 1994-11-19 1995-01-11 Textile Lab Serv Ltd Knitting machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710529A (en) * 1953-05-13 1955-06-14 Willy Werner Lenkeit Thread-exchanging device for knitting machines
US2963889A (en) * 1958-04-16 1960-12-13 Ars Amiki Seisaku Kabushiki Ka Yarn feeder in a hand knitting machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS458359Y1 (cs) * 1965-10-14 1970-04-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710529A (en) * 1953-05-13 1955-06-14 Willy Werner Lenkeit Thread-exchanging device for knitting machines
US2963889A (en) * 1958-04-16 1960-12-13 Ars Amiki Seisaku Kabushiki Ka Yarn feeder in a hand knitting machine

Also Published As

Publication number Publication date
DE2438246B2 (de) 1976-04-22
FR2241643B1 (cs) 1977-03-25
ATA650674A (de) 1977-07-15
JPS5424494B2 (cs) 1979-08-21
FR2241643A1 (cs) 1975-03-21
JPS5048256A (cs) 1975-04-30
BR7406903D0 (pt) 1975-06-17
IT1020044B (it) 1977-12-20
AT342176B (de) 1978-03-28
AR206325A1 (es) 1976-07-15
DE2438246A1 (de) 1975-04-30
ES429433A1 (es) 1977-01-16

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