US3739601A - Jacquard-pattern arrangement for circular knitting machines - Google Patents

Jacquard-pattern arrangement for circular knitting machines Download PDF

Info

Publication number
US3739601A
US3739601A US00087949A US8794970A US3739601A US 3739601 A US3739601 A US 3739601A US 00087949 A US00087949 A US 00087949A US 8794970 A US8794970 A US 8794970A US 3739601 A US3739601 A US 3739601A
Authority
US
United States
Prior art keywords
pattern
circular knitting
knitting machine
cam
pattern drum
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
US00087949A
Other languages
English (en)
Inventor
E Plath
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.)
Mayer and Cie GmbH and Co
Original Assignee
Mayer and Cie GmbH and Co
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
Application filed by Mayer and Cie GmbH and Co filed Critical Mayer and Cie GmbH and Co
Application granted granted Critical
Publication of US3739601A publication Critical patent/US3739601A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/665—Driving-gear for programme or pattern devices
    • 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
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/74—Pattern drums

Definitions

  • a pattern drum for each knitting system of the circular knitting machine.
  • This pattern drum supports on its periphery a plurality of rods which are disposed thereon in accordance with a preselected pattern. These rods act on the pattern feet of needle jacks disposed on the periphery of the cylinder of the circular knitting machine via a corresponding plurality of slidable actuating members, which are disposed in two rows and parallel with respect to each other.
  • Each one of the slidable actuating members has a projection which is adapted to cooperate with a movable control member disposed between two adjacent rows of slidable actuating members.
  • This movable control member coacts with cam means rotating jointly with the cylinder of the circular knitting machine and which is positioned in front of a second cam also rotating jointly with the cylinder of the circular knitting machine, said second cam controlling the movement of the pattern drum.
  • This invention relates to Jacquard-pattern arrangements for circular knitting machines having a pattern drum per knitting system, said pattern drum carrying a plurality of rods on its periphery in accordance with a preselected pattern. The position of the pattern drum is shifted by a cam rotating jointly with the needle cylinder. The rods disposed on the periphery of the pattern drum coact with actuating members which act on the pattern feet of needle jacks.
  • the actuating members are provided with bearing surfaces having relatively small inclination on which the rods of the pattern drum act as the latter is shifted in position and the actuating members are thus displaced.
  • the bearing surfaces of the actuating members can only have a relatively small inclination because otherwise the rods, when bearing against these surfaces, would cause jamming or breaking or require very large switching forces when displacing the actuating members.
  • the bearing surfaces having relatively small inclinations require, of course, rela' tively broad actuating members and consequently the distance on the periphery of the pattern drum between the rods must also be relatively large.
  • a rod on the pattern drum which follows in the direction of switching of the pattern drum a preceding rod, must not contact the actuating member even when the latter, due to a malfunctioning of the preceding rod, bears directly against the periphery of thepattern drum at the instant at which the actuating switching position of the pattern drum should place it in a forward position.
  • This drawback is quite significant.
  • the number of rows of rods on the periphery of the pattern drum are arranged in an axial direction and therefore determine the periphery of the pattern drum as well as the maximum height of a pattern relation in the knitted material. It is, therefore, desirable to arrange on the periphery of the pattern drum as large a number of rows of rods as possible.
  • a pattern drum having relatively denselyarranged rods can be used because the actuating members no longer require bearing surfaces. These actuating members are, after a switching movement of the pattern drum, returned in a radial direction towards the pattern drum and thus bear in a radial direction against the rods or the periphery of the pattern drum.
  • the advantages resulting from such an arrangement are quite significant.
  • the arrangement of the invention it is possible to dispose a predetermined number of rows of rods on a pattern drum having a substantially smaller diameter than a pattern drum in accordance with the arrangements of the prior art having the same predetermined number of rows of rods.
  • the arrangement of the invention is particularly suitable for those types of Jacquard-pattern arrangements which utilize two pattern-selection stations per knitting system. In such an arrangement, the required double number of rows of rods can be obtained without increasing the diameter of the pattern drum thereby avoiding a reduction of the maximum pattern relation.
  • the control member for the simultaneous adjusting of the actuating members of a knitting system is radially movable and coacts with a bar having inclined bearing surfaces which coact with inclined bearing surfaces on the control member.
  • the cam means for actuating the control member comprise two cams, one of which is, with re spect to the rotary movement of the circular knitting machine, placed in front of the cam controlling the switching movement of the pattern drum and the other one behind the latter cam.
  • the aforementioned two cams coact with pushrods slidably disposed in the stationary portion of the circular knitting machine which, in turn, actuate a two-armed lever.
  • a bar is slidably disposed and operatively connected to this two-armed lever. This bar has inclined bearing surfaces which coact with inclined bearing surfaces of the controlmember and are adapted to radially displace this control member.
  • FIG. 1 is a somewhat schematic cross-sectional elevational view along line I-I of FIG. 2, said line extending in a radial direction with respect to the needle cylinder of the circular knitting machine thereby illustrating a pattern arrangement and parts cooperating therewith disposed adjacent thereto and adjacent to the needle cylinder and the supporting ring of the cylinder;
  • FIG. 2 is a sectional view through the pattern arrangement of the invention along line IIIl of FIG. 1, however, at a different scale than what is illustrated in FIG. 1;
  • FIG. 3 is a cross-sectional view along line III-*III of FIG. 1.
  • FIG. 1 There is illustrated in FIG. 1 the usual needle cylinder of a circular knitting machine which is mounted on the rotating support ring 11 for the cylinder 10. Surrounding the cylinder 10 there is disposed a stationary cam supporting cylinder 12. There is furthermore visible in FIG. 1 a needle jack which serves to transport the cylinder needles to and from an operative position.
  • This needle jack 14 has an upper leg 141 and a lower leg 142 as well as an intermediate pattern foot 143.
  • the pattern feet of successive needle jacks are disposed in a known manner.
  • the needle cylinder 10 is provided with needle jacks of different types which differentiate each other with the positions of their respective pattern feet 143.
  • One of the knitting needles 15 of the circular knitting machine is visible in the upper portion of FIG. 1 over its needle jack 14.
  • the parallel arrangement also includes a pattern drum 16 of a known type which supports a plurality of rods 17.
  • This pattern drum has disposed on its periphery a plurality of rows of holes in which there can be inserted the pattern rod 17 according to a predetermined pattern.
  • the pattern drum 16 is provided with a coaxially mounted gear wheel 18 and is stepwise moved by means of an unillustrated switching pawl which is pivotally mounted on a swinging lever 19 actuated by means of a stepping cam 20 which is adjustably mounted on the cylinder support ring 11 and is actuated by it so as to effect a one or two-step switching movement.
  • the basic construction and operation for moving the pattern drum by means of a switching mechanism actuated by the cylinder support ring is known per se.
  • the pattern drum 16 is provided, in contradistinction to the pattern drums of the prior art, with rows of holes adapted to receive the switching rods 17 in a considerably denser relationship with respect to each other.
  • the pattern arrangement of the instant invention is of the type wherein the same pattern drum controls two selecting positions offset with respect to each other in the direction of movement of the cylinder of the circular knitting machine. Accordingly, there are provided two groups of actuating members 21 and 22 each group fonning a row of such actuating members.
  • the actuating members 21 and 22 are slidably movably mounted in a radial direction with respect to the needle cylinder.
  • Each one of the actuating members 21 is connected to a spring 23 which urges the actuating member 21 towards the periphery of the pattern drum 16.
  • the actuating members 22 are provided with similar springs 24 urging them towards the periphery of the pattern drum cylinder 16.
  • These actuating members 21, 22 are provided at the end facing the needle cylinder with inclined cam surfaces 211 and 221 for acting on the pattern feet 153 of the needle jacks 14.
  • the actuating members 21 and 22 have at the ends facing the pattern drum 16, in contradistinction to the heretofore known actuating members, no cam surfaces for coacting with the rod 17 of the pattern drum 16.
  • the actuating members 21 and 22 have respectively contacting feet 212 or 222, by means of which the actuating members bear against the outer ends of the rods or, in the event no rods are provided, bear against the peripheral surface of the pattern drum at the switching position. Furthermore, the actuating members 21 and 22 are provided at the inner sides facing each other with lateral projections 213 or 223. A push bar 25 is disposed between the two rows of actuating members 21 and 22 and the lateral projections 213 or 223 coact with the back surface 251 of this push bar 25.
  • the push bar 25 is radially movable with respect to the needle cylinder.
  • This push bar 25 has near both of its ends lateral projections having inclined outwardly extending surfaces 252 and vertical surfaces 253.
  • a switching bar 26 is movably mounted immediately adjacent to the push bar 25 in substantial parallel relationship thereto.
  • the switching bar 26 has a pair of inclined outwardly extending surfaces 261 which substantially correspond and are adapted to matingly engage the inclined surfaces 252 of the push bar 25.
  • a two-armed lever 28 is pivotally mounted about a shaft 27 and is operatively connected to the bar 26 with one of its arms.
  • the upper end of the switching bar 26 is pivotally connected to a lever 33, which serves to move the push bar 25 into an inactive position by lifting the lever 33 when an exchange of pattern drums is to be effected manually.
  • each knitting system in the stationary portion of the circular knitting machine immediately underneath the two-armed lever 28 a pair of pushrods 29 and 30 which are slidable in a stationary supporting member illustrated in FIGS. 1 and 3.
  • These pushrods 29 and 30 are offset with respect to the axis of the needle cylinder so that they are always positioned under one of the two arms of the two-armed lever 28.
  • the lower ends of the pushrods 29 and 30 respectively extend into the rotary path of actuating cams 31 and 32.
  • These actuating cams rotate jointly with the cylinder support ring 11.
  • the first actuating cam 31 and the second actuating cam 32 are mounted near the switching cam 20 for the pattern drum 16.
  • the actuating cam 31 is mounted in front of the switching cam 20 and the actuating cam 32 is mounted behind the switching cam 20.
  • the offset arrangement of the two actuating earns 31 and 32 is best viewed in FIG. 3.
  • the actuating members 21, 22 are thrust by the push bar 25 and switching bar 26 toward the needle cylinder and thus against the pattern feet of the pattern jacks which are passing by.
  • a rotating movement of the pattern drum is only achieved when the push rod or switching bar 26 is shifted upwardly.
  • the lifting of the push rod 26 is effected by the actuating earns 31, 32 which rotate with the needle cylinder.
  • This switching point is situated at a certain and predetermined point at the circumference of the machine. In the area of the two switching cams 31, 32 no pattern is being knitted. At the switching point, needle jacks can be employed, or the needle jack channels can remain empty. It proves to be efficient if at this switching point there are employed needle jacks without pattern feet. At the switching point some needles are always knitting stitches, and thus a firm edge of the goods is available after the cutting of the goods such as holes. The actuating members 21, 22 remain for only short time between the two switching earns 31 and 32, and so such intermediate position of the members 21, 22 is of no importance.
  • the Jacquard-pattern arrangement in accordance with the invention operates as follows:
  • the two-armed lever 28 is adapted to move the switching bar 26 upwardly to a point where the inclined surfaces 261 have completely slid over the inclined surfaces 252 of the push bar 25 so that the vertical surfaces of the switching bar 26 now bear against the vertical surfaces 253 of the push bar 25.
  • the switching bar 26 is thus frictionally maintained in this upper position due to the frictional engagement of the vertical surfaces of the bars 25 and 26 and due to the pressure exerted on the push bar 25 by the actuating members 21, 22 through corresponding springs 23, 24.
  • the push bar 25 has a back surface 251 which engages the lateral projections 213, 223 of the actuating members 21, 22.
  • the radial movement of the push bar 25 is transferred via these lateral projections 213, 223 to all of the actuating members 21, 23, which are thus lifted off the pattern drum 16 and out of the path of the rods 17. This occurs before the switching cam 20 actuates the switching wheel 18 to shift the pattern drum 16 one or two steps, that is, one or two rows of rods.
  • the actuating cam 32 acts on the pushrod 30 and lifts it.
  • the pushrod 30 then bears against the second arm of the two-armed lever 28 and causes it to move in a counterclockwise direction back to its original position.
  • This return movement of the two-armed lever 28 causes the switching bar 26, connected to the other arm of the lever 28 by means of a pin and slot connection, to return to the position illustrated in full lines in FIG. 1.
  • the push bar 25 is thus again released and, due to the forces exerted by the return springs 23 and 24, returns jointly with the actuating members 21 and 22 to the position illustrated in FIG. 2.
  • the contact feet 212 and 222 of the actuating members 21 and 22 thus move radially towards the new switching positions of the pattern drum and bear against the peripheral surfaces thereof or the rods 17 of these new-switching positions.
  • a rod 17 as is illustrated, for example, in FIG. 2 on the right switching position for the actuating member 21, then the latter contacts after a short return movement the rod 17 and remains in an advanced position, so that its needleactuating end having the inclined cam surface 211 remains in the rotary path of the pattern feet 143 of the needle jacks 14.
  • the switching cam 20 is, as is usual in this type of cir cular knitting machine, embodied as a stepped cam and can be adjusted in an axial direction by an unillustrated arrangement, so that there are available three switching possibilities for the pattern drum 16 which are as follows:
  • a double switch step of the drum is effected.
  • a Jacquard-pattern arrangement for a circular knitting machine having one pattern drum per knitting system, said pattern drum being actuated in a stepwise manner by cam means mounted on the rotating needle cylinder of the circular knitting machine, the improvement comprising in combination, a plurality of rods removably mounted on said pattern drum, a plurality of actuating members juxtaposed with respect to each other disposed between said pattern drum and said needle cylinder and adopted to be actuated by said rods on said pattern drum to move into an operating position with respect to said needle cylinder, slidable bar means operatively mounted between said] pattern drum and said needle cylinder and adapted to engage said plurality of juxtaposed actuating members and to move them out of engagement with said pattern; drum and said rods mounted thereon, first cam means mounted on said needle cylinder and adapted to coact with said slidable bar means so as to cause the latter to disengage such actuating members from said pattern drum and said rods, said first cam means on said needle cylinder comprising a first cam which is
  • said first cam means includes a second cam, said second cam being disposed behind said cam means for actuating said pattern drum in a stepwise manner with respect to the rotary movement of said needle cylinder, a pair of pushrods slidably mounted in the stationary portion of said circular knitting machine and adapted to coact with said first and second cams, a twoarmed lever pivotally mounted in the stationary portion of said circular knitting machine and operatively connected to said bar, said two-armed lever being adapted to be selectively engaged by said pushrods when the latter are being selectively engaged by said first and second cams, thereby, in turn, engaging and pivoting said two-armed lever and moving said bar with respect to said bar means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US00087949A 1969-11-11 1970-11-09 Jacquard-pattern arrangement for circular knitting machines Expired - Lifetime US3739601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1956581 1969-11-11

Publications (1)

Publication Number Publication Date
US3739601A true US3739601A (en) 1973-06-19

Family

ID=5750722

Family Applications (1)

Application Number Title Priority Date Filing Date
US00087949A Expired - Lifetime US3739601A (en) 1969-11-11 1970-11-09 Jacquard-pattern arrangement for circular knitting machines

Country Status (6)

Country Link
US (1) US3739601A (enrdf_load_stackoverflow)
JP (1) JPS4813185B1 (enrdf_load_stackoverflow)
CH (1) CH515363A (enrdf_load_stackoverflow)
ES (1) ES384656A1 (enrdf_load_stackoverflow)
FR (1) FR2069215A5 (enrdf_load_stackoverflow)
GB (1) GB1295547A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824809A (en) * 1972-03-11 1974-07-23 Camber Int Ltd Patterning mechanism for multi-feed circular knitting machines
US3922885A (en) * 1973-08-13 1975-12-02 Vyzk Vyvojovy Ustav Vseobe Apparatus for controlling pattern drums particularly in circular knitting machines
US4604877A (en) * 1984-03-02 1986-08-12 Precision Fukuhara Works, Ltd. Needle selection device for knitting machines
US5042275A (en) * 1987-09-23 1991-08-27 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Restoring device for a needle selecting apparatus of a circular knitting machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20010409A1 (it) * 2001-02-28 2002-08-28 Vignoni Srl Dispositivo per la selezione degli aghi in macchine per maglieria calzetteria o simili particolarmente per macchine circolari a medio e gran

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269398A (en) * 1938-10-14 1942-01-06 Jacquard Knitting Machine Co Inc Circular knitting machine
US2460487A (en) * 1947-04-21 1949-02-01 Scott & Williams Inc Knitting machine pattern mechanism
US2473944A (en) * 1945-12-08 1949-06-21 Hemphill Co Selecting mechanism
US2808712A (en) * 1955-01-28 1957-10-08 Joseph L Morris Methods and means for creating patterns and controlling knitting changes
GB809157A (en) * 1954-10-25 1959-02-18 Alfred Planck Improvements in or relating to knitting machines
US3076326A (en) * 1959-09-08 1963-02-05 Mazzi Aramis Circular knitting machines having a plurality of needle selection cams for the formation of tuck stitch patterns, underwelt patterns and the like
FR1582723A (enrdf_load_stackoverflow) * 1967-09-23 1969-10-03

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269398A (en) * 1938-10-14 1942-01-06 Jacquard Knitting Machine Co Inc Circular knitting machine
US2473944A (en) * 1945-12-08 1949-06-21 Hemphill Co Selecting mechanism
US2460487A (en) * 1947-04-21 1949-02-01 Scott & Williams Inc Knitting machine pattern mechanism
GB809157A (en) * 1954-10-25 1959-02-18 Alfred Planck Improvements in or relating to knitting machines
US2808712A (en) * 1955-01-28 1957-10-08 Joseph L Morris Methods and means for creating patterns and controlling knitting changes
US3076326A (en) * 1959-09-08 1963-02-05 Mazzi Aramis Circular knitting machines having a plurality of needle selection cams for the formation of tuck stitch patterns, underwelt patterns and the like
FR1582723A (enrdf_load_stackoverflow) * 1967-09-23 1969-10-03

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824809A (en) * 1972-03-11 1974-07-23 Camber Int Ltd Patterning mechanism for multi-feed circular knitting machines
US3922885A (en) * 1973-08-13 1975-12-02 Vyzk Vyvojovy Ustav Vseobe Apparatus for controlling pattern drums particularly in circular knitting machines
US4604877A (en) * 1984-03-02 1986-08-12 Precision Fukuhara Works, Ltd. Needle selection device for knitting machines
US5042275A (en) * 1987-09-23 1991-08-27 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Restoring device for a needle selecting apparatus of a circular knitting machine

Also Published As

Publication number Publication date
GB1295547A (enrdf_load_stackoverflow) 1972-11-08
JPS4813185B1 (enrdf_load_stackoverflow) 1973-04-25
ES384656A1 (es) 1973-07-16
CH515363A (de) 1971-11-15
FR2069215A5 (en) 1971-09-03

Similar Documents

Publication Publication Date Title
US3739601A (en) Jacquard-pattern arrangement for circular knitting machines
US3063269A (en) Circular knitting machine having a patterning device
GB2121838A (en) Device for selecting the dial needles of circular knitting machines
US3299673A (en) Cam control means for knitting machines
US3641786A (en) Patterning mechanism for multifeed circular knitting machines
US1737598A (en) Knitting machine
US3667253A (en) Needle selector for circular knitting machines
US1972044A (en) Knitting machine
US2225842A (en) Circular knitting machine
US1797006A (en) Knitting machine
US2323998A (en) Pattern means for knitting machines
US3101601A (en) Operating mechanism for the yarn carriers of circular knitting machines
US1947558A (en) Knitting machine
US2310070A (en) Knitting machine and method
US4604877A (en) Needle selection device for knitting machines
US3122008A (en) Contact ring for circular knitting machines
US1200451A (en) Circular-knitting machine for making neckties and the like.
US3023595A (en) Controller for knitting machines
US2032324A (en) Knitting machine and method of knitting
US3035425A (en) Control device for knitting machines
US1881360A (en) Knitting machine
US3141314A (en) Pattern control means for knitting machines
US3552148A (en) Cam arrangement for knitting patterned fabrics
US1827677A (en) Circular knitting machine
US3766753A (en) Control apparatus for resetting pattern drums