US3890805A - Needle selection device for a circular knitting machine - Google Patents

Needle selection device for a circular knitting machine Download PDF

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Publication number
US3890805A
US3890805A US346793A US34679373A US3890805A US 3890805 A US3890805 A US 3890805A US 346793 A US346793 A US 346793A US 34679373 A US34679373 A US 34679373A US 3890805 A US3890805 A US 3890805A
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United States
Prior art keywords
jacks
jack
cam
exterior
magnetic
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Expired - Lifetime
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US346793A
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English (en)
Inventor
Norbert Paul Bourgeois
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Etudes et Bonneterie SA
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Etudes et Bonneterie SA
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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 ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices

Definitions

  • a circular knitting machine includes at least one selection station on a fixed part surrounding the machine cylinder, and pivotal jacks associated with the accessories to be controlled, each jack and an associated accessory being disposed in a respective guide groove of the machine cylinder.
  • Each selection station includes magnetic selection means disposed on a cambox of the machine. a setting cam acting on the tongues of the jacks to pivot the jacks towards the exterior of their guide grooves. a thrust cam for acting on a deformable part of each jack, and a fixed bearing surface for bearing against the jacks which are submitted to the influence of the magnetic means.
  • the bearing surface as well as the thrust cam and polar surfaces of'the magnetic means are located at the exterior of the machine cylinder, and the magnetic means are so arranged between the bearing surface and the thrust cam that at the moment of selection portions of each jack are applied against stationary parts of the machine which are independent of the inner surface of the guide grooves of the needle cylinder.
  • the invention relates to devices for the selection of knitting accessories such as needles of a circular knitting machine including at least one selection station on a fixed part surrounding the machine cylinder and pivotal jacks associated with the accessories to be controlled, each jack and an associated accessory being disposed in a respective guide groove of the machine cylinder, and each selection station including magnetic selection means disposed on a cam-box of the machine, means fixed on the cam-box for pivoting the pivotal jacks towards the exterior of the guide grooves, and a thrust member also fixed on the cam-box for acting on a deformable part of each jack.
  • Such a device is described and shown in US. Pat. No. 3,710,594 and, in one particular embodiment, comprises a pivotal needle jack associated with each needle and having, between one end which serves as pivoting point and an actuating butt disposed towards its other end, an elastically deformable tongue made in one piece with the needle jack.
  • This tongue is located on the same side as the actuating butt, i.e. on the outer side of the guide groove provided in the machine cylinder, facing the cam-box which carries, at each selection station, a thrust cam for deforming the tongues as they pass by and magnetic selection means exerting a selective action on the actuating butts of the needle jacks.
  • each needle jack has (apart from the point of contact of the deformable tongue with the thrust cam) only a single point of support formed by the bottom (i.e. the inner surface) of its guide groove.
  • a certain lack of precision may result either because of the relative movement between the set of needle jacks and the thrust cams, or because of slight differences of depth that may occur in the various guide grooves, it is difficult to obtain a strictly identical deformation for each of the deformable tongues of the oscillating needle jacks.
  • the present invention aims to remedy the stated drawbacks and to facilitate the mounting of certain members while ensuring improved operating conditions.
  • a device for the selection of knitting accessories such as needles of a circular knitting machine including at least one selection station on a fixed part surrounding the machine cylinder and pivotal jacks associated with the accessories to be controlled, each jack and an associated accessory being disposed in a respective guide groove of the machine cylinder,
  • each selection station includes magnetic selection means disposed on a cam-box of the machine, means fixed on the cam-box for pivoting the pivotal jacks towards the exterior of the guide grooves, a thrust member also fixed on the cambox for acting on an elastically deformable part of each jack, and a fixed bearing surface for bearing against the pivotal jacks which are submitted to the influence of the magnetic means, the bearing surface as well as the thrust member and polar surfaces of the magnetic means being located at the exterior of the machine cylinder, and the magnetic means being so arranged between the bearing surface and the thrust member that at the moment of selection each jack is applied against stationary parts of the machine independent of the inner surface of its guide groove.
  • FIG. 1 is a view in axial cross-section of a part of a circular knitting machine showing a needle jack in a rest position;
  • FIG. 2 is a schematic cross-section taken along line II-II of FIG. 1;
  • FIGS. 3 to 6 are cross-sections similar to FIG. 1, but taken respectively along lines IIIIII, IVIV, and VV and VI-VI of FIG. 2.
  • a needle cylinder 1 of the circular knitting machine shown in FIG. 1 is fixed for rotation with a driving ring 2 and comprises at its periphery a series of axial grooves 3 in which are slidably mounted independent needles 4 each provided with an actuating butt 5 able to cooperate with the usual cams such as 6 and 7 at an upper part 8 of an annular cam-box fixed by its lower part 9 to a stationary plate 10 fixed to the frame on the machine.
  • a needle jack I] able to pivot about its rounded upper end 12.
  • Each needle jack 11 includes two longitudinally distinct parts 13 and 14 respectively facing the exterior and the bottom (i.e. the inner surface) of guide groove 3.
  • the outer part 13 includes a protruding actuating butt 15 which can cooperate with a raising cam 16, fixed to part 8 of the cam-box, when the needle jack 11 is placed in an operative position by pivoting towards the exterior of its groove 3.
  • the inner part 14 of needle jack 11 is elastically deformable and has an enlarged end 17 extending below the actuating butt l5 and protruding out of the lower end of guide groove 3.
  • Each needle jack 11 also includes, between its pivoting point 12 and its actuating butt 15, a return butt 18 located above a protruding part 19 which is adapted to come to bear against a bearing cam 20 disposed in the upper part of an opening 21 provided in cam-box 8.
  • a setting cam 22 disposed on the lower part 9 of the stationary cam-box and below the rotary cylinder 1 acts on the rear face of the end 17 of the deformable parts 14 as they pass by, and outwardly pivots all of the needle jacks 11 into their operative position.
  • a setting cam 22 disposed on the lower part 9 of the stationary cam-box and below the rotary cylinder 1
  • these magnetic means comprise an electro-magnet 24 selectively controlled by impulses provided by reading an information program (not shown).
  • the electro-magnet 24 is disposed, in relation to the direction of motion of the needle jacks, between a lead-in magnet 25 and a holding magnet 26; these two magnets may be permanent magnets or permanently supplied electro-magnets.
  • the three magnetic members 25, 24 and 26 are equally spaced apart by an amount less than the width of an actuating butt 15, and are fixed on a support 27 in a nonmagnetic material which is itself fixed onto the lower part 9 of the cam-box by means of screws 28.
  • the actuating butts 15 of all of the needle jacks 11 are firstly influenced by the lead-in magnet 25, the setting cam 22 slightly deforming the deformable parts 14 towards the exterior of guide grooves 3 in order to ensure a perfect magnetic adherence.
  • the action of setting cam 22 ceases, and the protruding part 19 of each needle jack 11 (FIG.
  • the needle jacks 11 As they pass before the selection station, the needle jacks 11 whose rear parts 14 are still deformed are delivered to the selection electro-magnet 24.
  • Those needle jacks (FIG. whose actuating butts are not retained by the electro-magnet 24 pivot towards the interior of their respective guide grooves 3 by the relaxation of their deformable part 14 which, by reacting against the cam 29, causes return of these needle jacks 11 to the inoperative position out of alignment with raising cam 16.
  • the actuating butts which are held by the selection electro-magnet 24 are submitted to the influence of the holding magnet 26, and during this phase the cam 29 ceases to act on the deformed parts 14 which return to their initial undeformed position; the thus selected neddle jacks 11 remain in the operative position and, as shown in FIG. 6, by action of raising cam 16, control the displacement of the corresponding needles 4 to a raised working position.
  • This particular arrangement also enables a notable reduction of the mass of the part of each needle jack 11 which undergoes movement at the moment of non-selection by the electro-magnet 24, i.e. a reduction of its inertia at the moment of return to the inoperative position.
  • a device for the selection of knitting accessories such as needles of a circular knitting machine including a needle cylinder and at least one selection station on a fixed part of said machine surrounding the needle cylinder and pivotal jacks associated with the accessories to be controlled, each jack and an associated accessory being disposed in a respective guide groove of the needle cylinder, the improvement wherein:
  • each jack comprises an elastically deformable part located facing the interior of its guide groove
  • each selection station comprises:
  • magnetic selection means disposed on a cam-box of the machine exterior to said needle cylinder; means for pivoting the pivotal jacks towards the exterior of the guide grooves and submitting them to the influence of said magnetic selection means; bearing surface disposed on said cam-box exterior to said needle cylinder for bearing against the jacks which are submitted to the influence of said magnetic selection means; thrust member fixed on said cam-box for acting on said elastically deformable part of each jack and deforming it in a direction towards the interior of its guide groove against the force of attraction of said magnetic selection means; and said magnetic selection means being situated between said bearing surface and said thrust memher.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US346793A 1972-04-04 1973-04-02 Needle selection device for a circular knitting machine Expired - Lifetime US3890805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH491172A CH544171A (fr) 1972-04-04 1972-04-04 Dispositif de sélection pour la commande d'organes de tricotage, notamment des aiguilles de métiers à tricoter circulaires

Publications (1)

Publication Number Publication Date
US3890805A true US3890805A (en) 1975-06-24

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Application Number Title Priority Date Filing Date
US346793A Expired - Lifetime US3890805A (en) 1972-04-04 1973-04-02 Needle selection device for a circular knitting machine

Country Status (8)

Country Link
US (1) US3890805A (it)
JP (1) JPS497557A (it)
BR (1) BR7302409D0 (it)
CH (1) CH544171A (it)
DE (1) DE2316606A1 (it)
FR (1) FR2179414A5 (it)
GB (1) GB1392409A (it)
IT (1) IT980444B (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977215A (en) * 1975-07-11 1976-08-31 Jumberca, S.A. Needle selector mechanism for knitting machine
US4023383A (en) * 1975-05-03 1977-05-17 Mayer & Cie Electrically controlled needle selector arrangement for knitting machines
US4054042A (en) * 1975-01-31 1977-10-18 Battelle Memorial Institute Apparatus for accelerating a knitting needle during its stitch drawing stroke
US4196599A (en) * 1978-03-04 1980-04-08 Jumberca, S. A. Needle selection mechanism for knitting machines
US4738123A (en) * 1982-07-14 1988-04-19 Tibbals Jr Edward C Circular weft knitting machine
US20050040644A1 (en) * 1999-12-21 2005-02-24 Kao Corporation Pipe connecting structure and cleaning tool
CN102108597A (zh) * 2009-12-24 2011-06-29 山德霓股份公司 在针织机中选择针盘的针的方法和用于实施该方法的针盘
CN102634926A (zh) * 2012-04-19 2012-08-15 浙江理工大学 手套机主动式电磁选针机构上的鸟片
CN103966754A (zh) * 2013-04-30 2014-08-06 洪锦寿 圆筒针织机的织针下降装置

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR206041A1 (es) * 1974-07-30 1976-06-23 Acme Timber Ind Ltd Metodo para producir tablas sobre tablones y otros maderajes cortados a sierra a partir de una pieza de trabajo del tipo de troncos trozas y lo similar y un aparato para llevar a cabo el metodo
GB2181162B (en) * 1982-07-14 1988-08-10 Annedeen Hosiery Mill Inc Circular weft knitting method
US4633924A (en) * 1985-11-01 1987-01-06 Weyerhaeuser Company Variable curve linebar
US4653560A (en) * 1985-12-27 1987-03-31 Weyerhaeuser Company Fixed curve linebar
DE3712673C1 (de) * 1987-04-14 1988-08-25 Sipra Patent Beteiligung Mehrsystemige Rundstrickmaschine mit elektromagnetischer Nadelauswahl
DE4028132C2 (de) * 1990-09-05 1994-06-30 Harting Elektronik Gmbh Auswahlmagnet
DE69116289T2 (de) * 1990-10-05 1996-09-05 Matec Srl Nadelauswahlvorrichtung an einer Rundstrickmaschine mit elastischen Nadelstössern
ITBO940161A1 (it) * 1994-04-15 1995-10-15 Matec Srl Dispositivo di selezione per selettore elastico per aghi in macchina tessile circolare
DE4441389C1 (de) * 1994-11-21 1996-06-27 Harting Elektronik Gmbh Nadelauswahlplatine
IT1282477B1 (it) * 1995-03-30 1998-03-23 Matec Srl Selettore elastico con relativo sottoago per aghi in macchina tessile circolare
US5761979A (en) * 1996-03-07 1998-06-09 Mcgehee; Ronald W. Edge trimming and board ripping apparatus and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535892A (en) * 1967-02-14 1970-10-27 Morat Gmbh Franz Knitting machine with slide latch needles controlled by jacks
US3605448A (en) * 1968-05-14 1971-09-20 Erich Ribler Magnetic selector for textile machines
US3710594A (en) * 1969-08-05 1973-01-16 Bonneterie Sa Et Device for the selection of the needles or knitting accessories of circular knitting machines
US3742733A (en) * 1971-06-04 1973-07-03 Warren & Swasey Co Knitting machine
US3812691A (en) * 1969-10-07 1974-05-28 Terrot Soehne & Co C Jack and needle actuator for a circular knitting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535892A (en) * 1967-02-14 1970-10-27 Morat Gmbh Franz Knitting machine with slide latch needles controlled by jacks
US3605448A (en) * 1968-05-14 1971-09-20 Erich Ribler Magnetic selector for textile machines
US3710594A (en) * 1969-08-05 1973-01-16 Bonneterie Sa Et Device for the selection of the needles or knitting accessories of circular knitting machines
US3812691A (en) * 1969-10-07 1974-05-28 Terrot Soehne & Co C Jack and needle actuator for a circular knitting machine
US3742733A (en) * 1971-06-04 1973-07-03 Warren & Swasey Co Knitting machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054042A (en) * 1975-01-31 1977-10-18 Battelle Memorial Institute Apparatus for accelerating a knitting needle during its stitch drawing stroke
US4023383A (en) * 1975-05-03 1977-05-17 Mayer & Cie Electrically controlled needle selector arrangement for knitting machines
US3977215A (en) * 1975-07-11 1976-08-31 Jumberca, S.A. Needle selector mechanism for knitting machine
US4196599A (en) * 1978-03-04 1980-04-08 Jumberca, S. A. Needle selection mechanism for knitting machines
US4738123A (en) * 1982-07-14 1988-04-19 Tibbals Jr Edward C Circular weft knitting machine
US20050040644A1 (en) * 1999-12-21 2005-02-24 Kao Corporation Pipe connecting structure and cleaning tool
US7300077B2 (en) * 1999-12-21 2007-11-27 Kao Corporation Pipe connecting structure
CN102108597A (zh) * 2009-12-24 2011-06-29 山德霓股份公司 在针织机中选择针盘的针的方法和用于实施该方法的针盘
CN102108597B (zh) * 2009-12-24 2014-12-31 山德霓股份公司 在针织机中选择针盘的针的方法和用于实施该方法的针盘
CN102634926A (zh) * 2012-04-19 2012-08-15 浙江理工大学 手套机主动式电磁选针机构上的鸟片
CN103966754A (zh) * 2013-04-30 2014-08-06 洪锦寿 圆筒针织机的织针下降装置
CN103966754B (zh) * 2013-04-30 2016-04-06 洪锦寿 圆筒针织机的织针下降装置

Also Published As

Publication number Publication date
DE2316606A1 (de) 1973-10-11
FR2179414A5 (it) 1973-11-16
CH544171A (fr) 1973-11-15
GB1392409A (en) 1975-04-30
BR7302409D0 (pt) 1974-02-12
IT980444B (it) 1974-09-30
JPS497557A (it) 1974-01-23

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