US3802225A - Knitting machine - Google Patents

Knitting machine Download PDF

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Publication number
US3802225A
US3802225A US00224816A US22481672A US3802225A US 3802225 A US3802225 A US 3802225A US 00224816 A US00224816 A US 00224816A US 22481672 A US22481672 A US 22481672A US 3802225 A US3802225 A US 3802225A
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United States
Prior art keywords
cam
needle
butt
dividing
butts
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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
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US00224816A
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English (en)
Inventor
F Carrotte
K Muxloe
J Ellis
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.)
A Kirkland and Co Ltd
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A Kirkland and Co Ltd
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Filing date
Publication date
Application filed by A Kirkland and Co Ltd filed Critical A Kirkland and Co Ltd
Application granted granted Critical
Publication of US3802225A publication Critical patent/US3802225A/en
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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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments

Definitions

  • ABSTRACT Foreign Application Priority Data A knitting machine having a cam system with a divid- Feb. 17, 1971 Great Britain ..4806/71 g cam to direct ed e bu ong one or other of two tracks, there being a butt edge on each needle for g.” cooperation with a guiding cam in the cam system ar- [58] Fi i 66/50 123 57 24 ranged to contact said butt edge and guide the needle e 0 e c 66/42 6 along a chosen one of said tracks even'when said needle butt is presented to the dividing cam so as partly to l 5 6 1 References Cited overlap said other track.
  • the present invention seeks to provide a cam and needle butt arrangement which reduces the risk of needle butt breakage by impingement of needle butts with the leading edge of a dividing cam.
  • the invention is applicable to any knitting machine in which needles are operated by passage of butts through a cam system including a dividing cam.
  • a knitting machine has a cam system including a dividing cam for guiding butts of needles along one or other of two tracks, and has needles each with a butt edge for cooperation with a guiding cam of the cam system arranged to guide the said needles so that a butt thereon will travel along a chosen one of the said tracks when the said butt is presented to the dividing cam so as partly to overlap the entry to the other of the said tracks.
  • FIG. 1 is a perspective view of part of a cam system in a circular knitting machine, including a conventional dividing cam and also showing a needle of the machine,
  • FIG. 2 shows, on an enlarged scale, the region around the leading edge of the dividing cam in the cam system of FIG. I, and also shows a conventional needle butt,
  • FIG. 3 is a view' similar to that of FIG. 2 showing a dividing cam in a machine according to the invention and also showing a needle butt adapted for cooperation with this dividing cam,
  • FIG. 4 is a plan of the leading edge region of the dividing cam of FIG. 3,
  • FIG. 5 is a plan of the leading edge region of a conventional dividing cam and a dividing cam in a further machine according to the invention
  • FIG. 6 is a view similar to that of FIG. 2 showing a dividing cam and needle butt in a still further knitting machine according to the invention.
  • FIG. 7 is a view in the direction of the arrow A of FIG. 6 showing the dividing cam and a needle butt.
  • FIG. 1 shows part of a conventional cam system, generally designated by the reference numeral 10, in a circular knitting machine having a rotatable needle cylinder.
  • the cam system has a converging entry 11 which receives needle butts from the previous cam system (not shown) and an exit 12 which guides needle butts to the entry of the next cam system, generally designated by the numeral 13.
  • the cam system 10 includes a dividing cam 14, a clearing cam 15 and a stitch cam 16.
  • a needle 17 of the knitting machine is shown at the right-hand side of FIG. 1.
  • the needle has a camming butt 18 for cooperation with the tracks through the cam system 10.
  • the needles which are mounted in tricks in the needle cylinder (not shown), are carried past successive cam systems and are operated by cooperation of their camming butts with the cams.
  • the butt 18 of the needle 17, after travelling through the entry 11 of the cam system 10, must follow either a track 21 above the dividing cam 14 or a track 22 below the dividing cam.
  • the track which the camming butt follows is determined by a known selector mechanism (not shown) which determines whether or not a jack (not shown) below the needle will engage its butt in a raising cam and thereby raise the needle so that the camming butt 18 follows a path such that it is in contact with the edge 23 and is presented to the entry 24 of the track 21 (FIG. 2). Needles 17 which are not raised in this way will have their camming butts 18 engage the edge 25 of the dividing cam 14 and these butts will be guided downwardly to follow the track 22.
  • the needles not raised by the selector mechanism do not normally follow a path which remains close to the edge 26 because when a camming butt 18 is freed from constraint against upward movement after leaving the entry 11, the upward force exerted on the needle 17 by the loop of yarn held on it pulls the needle and the butt upward. In some cases, the upward force and the resulting upward movement of the butt 18 are sufficient to raise the butt to the position 18 shown in FIG. 2. The butt 18 will then impinge on the leading edge 27 of the dividing cam 14 and will be broken off.
  • the present invention is concerned with bringing about a reduction in the risk of this situation developing.
  • the edge 25 of the dividing cam 14 is cut away to form a recess 28.
  • the cam 14 thus has two cam surfaces 29 and 30, the surface 30 serving as a guiding cam surface located in front of the surface 29 with respect to the direction of movement of the needles, that is a needle carried forward by the rotation of the needle cylinder reaches the surface 30 before it reaches the surface 29.
  • the camming butt 18 of each needle 17 is shaped, in this embodiment, as shown at the right-hand side of FIG. 3, so that a lower part 33 of the butt projects from the body of the needle by a conventional amount but an upper part 34 of the butt projects to a smaller extent, in fact by only half that amount.
  • the butt thus has two edges 35 and 36 for cooperation with the cams of the machine.
  • the shape of the butt 18 in this embodiment and the size of the recess 28 are so chosen that the edge 36 on the butt projects only sufficiently far to cooperate with the surface 29 of the cam, but the edge 35 on the butt projects far enough to cooperate with the surface 30.
  • the guiding cam surface 30 projects only sufficiently far into the path of the needles to contact the butt edge 35.
  • the edges 36 on the needle camming butts of raised needles engage the surface 29 of the dividing cam and the butts will be guided into the track 22.
  • a needle butt presented to the dividing cam 14 in the position 18" partly overlapping the track 21, will have its butt edge 35 engage the cam surface 30 and will also be guided down into the track 22.
  • the dividing cam of which is illustrated in FIG. 5 is made thinner than a conventional dividing cam 14" which is also shown in this Figure for purposes of comparison.
  • the cam 14 thus projects towards the needles of the knitting machine only to the same extent as the surface 30 of the dividing cam 14 of FIGS. 3 and 4.
  • the cam 14 is thus able to cooperate only with the butt edge 35 of the butt 18 of the needle of FIG. 3.
  • the cam surface 37 (FIG. 5) constitutes both a dividing cam and a guiding cam for cooperation with the butt edges 35 on the needles to guide the needles into a track corresponding to the track 22 of FIG. 3 despite the fact that the needles are presented to the leading edge of the cam so as partly to overlap the other track which leads past the dividing cam.
  • the dividing cam projects only sufficiently far into the path of the needles to contact the narrower part 33 of the butt 18 which is weaker than the wider part 34.
  • An advantage of this embodiment is that it will allow the needle 17 to travel along the track 22 in a higher position than is the case when using a conventional dividing cam and camming butt.
  • the dividing cam 14 shown in FIGS. 6 and 7 has an additional upstanding portion 41, serving as a guiding cam, which is thinner than the main body of the cam and thus divides the track 21 above the dividing cam into a portion 21a which is only half the width of the corresponding track in a conventional machine of the same type and a portion 21b which is of conventional width.
  • the dividing cam of FIGS. 6 and 7 is adapted for cooperation with a split-level camming butt 18 as shown at the right-hand side of FIG. 6. This butt has an upper portion 42 which projects to the same extent as a conventional camming butt and a lower portion 43 which projects to only half this extent.
  • the butt-portion 42 has an edge 44 for cooperation with either the guiding cam portion 41 or with the main body of the dividing cam 14 and which serves to guide the needle 17 down and along the lower track 22 past the dividing cam.
  • the butt edge 44 will guide a needle along the track 22 whenever the needle is presented to the dividing cam 14 in such a position that the butt edge 44 is below the leading edge 27 of the dividing cam, this leading edge being formed on the upstanding portion 41 of the cam.
  • the butt 18 will be presented to the dividing cam 14 in such a position that the whole of the edge 44 will be caused to cooperate with the main body of the cam 14, that is the edge 44 will come into contact with cam 14 below the broken line 45 in FIG. 7.
  • the camming forces are borne by the part of the butt having the full conventional width.
  • FIGS. 6 and 7 allows needles to ride up further than in a conventional knitting machine without fear of damage to the camming butts.
  • aknitting machine including needles, each having at least one needle butt having first and second substantially parallel opposite edges substantially perpendicular to the longitudinal axis of the needle, and a cam system including a dividing carn arranged for motion relative to each of said needles in a direction mutually perpendicular to the needle and the butt of said needle, said dividing cam having first and second cam surfaces diverging from a divergent edge in the direction of the movement of needles relative to said dividing cam for cooperation respectively with said first and second edges of each of said needle butts for guiding the needle butts along one or the other of two tracks depending on which of said edges of a needle butt contacts which of said carn surfaces, the improvement comprising an additional butt edge on each of said needle butts parallel to said first and second edges but at a level intermediate said first and second edges, said additional edge projecting longitudinally further from the needle than said first and second edges, and an additional cam surface on said dividing cam projecting in front of said first and second cam surfaces with respect to needle movement for
  • a knitting machine including a part on each of said needles projecting from the needle butt so as to extend further from the needle than said butt, said additional butt edge being provided on said part.
  • a knitting machine wherein said additional cam surface is provided on a portion of said dividing cam projecting into the path of movement of the needle buttsto a smaller extent than the portion of said dividing cam including said first and second cam surfaces sufficient only to control said additional butt edges.
  • a knitting machine having a cam system including at least one dividing cam arranged for motion relative to needles of said knitting machine in a direction perpendicular to the longitudinal axis of said needles, said dividing cam including dividing surfaces projecting a predetermined distance into the path of movement of butts on said needles for guiding the needle butts along one or the other of two tracks, the improvement comprising at least one further cam surface on said dividing cam, said further cam surface projecting farther than said predetermined distance into the path of movement of said needle butts, a butt projecting far enough from each needle to cooperate with said further cam surface but not far enough to contact said dividing surfaces, and a dividing butt attached to and extending from said needle, said dividing butt having a butt edge located farther from said needle than the end of said butt and sufficiently far from said needle to contact said dividing cam.
  • a knitting machine wherein said dividing butt is attached to and extends from said butt.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US00224816A 1971-02-17 1972-02-09 Knitting machine Expired - Lifetime US3802225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB480671A GB1379226A (en) 1971-02-17 1971-02-17 Knitting machine

Publications (1)

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US3802225A true US3802225A (en) 1974-04-09

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Application Number Title Priority Date Filing Date
US00224816A Expired - Lifetime US3802225A (en) 1971-02-17 1972-02-09 Knitting machine

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US (1) US3802225A (ja)
JP (1) JPS5529180B1 (ja)
DE (1) DE2206948A1 (ja)
FR (1) FR2125914A5 (ja)
GB (1) GB1379226A (ja)
IT (1) IT953936B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922886A (en) * 1973-09-10 1975-12-02 Rockwell International Corp Jack mechanism for circular knitting machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160231A (en) * 1984-06-15 1985-12-18 Lee Kuan Erh Improvements relating to cam arrangement of knitting machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE356832C (de) * 1916-11-14 1922-08-02 Akt Ges Maschf Verfahren und Rundwirkmaschine zur Herstellung einer Ware mit plattierten Laengsstreifen
FR578070A (fr) * 1924-03-05 1924-09-16 Gerard Fortier Freres Perfectionnements aux métiers de bonneterie
US1631816A (en) * 1924-12-03 1927-06-07 Standardtrump Brothers Machine Circular-knitting machine
US1767595A (en) * 1927-08-26 1930-06-24 Lombardi Vincent Knitting-machine needle
US2025464A (en) * 1934-04-17 1935-12-24 Lombardi Knitting Machine Co I Knitting machine and adjustable elements therefor
US2038895A (en) * 1933-12-07 1936-04-28 Lombardi Knitting Machine Co I Knitting apparatus
US3220219A (en) * 1962-01-23 1965-11-30 Scott & Williams Inc Knitting machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE356832C (de) * 1916-11-14 1922-08-02 Akt Ges Maschf Verfahren und Rundwirkmaschine zur Herstellung einer Ware mit plattierten Laengsstreifen
FR578070A (fr) * 1924-03-05 1924-09-16 Gerard Fortier Freres Perfectionnements aux métiers de bonneterie
US1631816A (en) * 1924-12-03 1927-06-07 Standardtrump Brothers Machine Circular-knitting machine
US1767595A (en) * 1927-08-26 1930-06-24 Lombardi Vincent Knitting-machine needle
US2038895A (en) * 1933-12-07 1936-04-28 Lombardi Knitting Machine Co I Knitting apparatus
US2025464A (en) * 1934-04-17 1935-12-24 Lombardi Knitting Machine Co I Knitting machine and adjustable elements therefor
US3220219A (en) * 1962-01-23 1965-11-30 Scott & Williams Inc Knitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922886A (en) * 1973-09-10 1975-12-02 Rockwell International Corp Jack mechanism for circular knitting machines

Also Published As

Publication number Publication date
DE2206948A1 (de) 1973-03-29
IT953936B (it) 1973-08-10
JPS5529180B1 (ja) 1980-08-01
GB1379226A (en) 1975-01-02
FR2125914A5 (ja) 1972-09-29

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