US3283541A - Method and device for the individual control of selecting members - Google Patents

Method and device for the individual control of selecting members Download PDF

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Publication number
US3283541A
US3283541A US344754A US34475464A US3283541A US 3283541 A US3283541 A US 3283541A US 344754 A US344754 A US 344754A US 34475464 A US34475464 A US 34475464A US 3283541 A US3283541 A US 3283541A
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Prior art keywords
jacks
electromagnet
jack
magnet
air gap
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Expired - Lifetime
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US344754A
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English (en)
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Cerjat Aymon De
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Edouard Dubied et Cie SA
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Edouard Dubied et Cie 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

  • This invention relates to a method for the individual control of the members of a selector device, particularly for the individual selection of needles of a knitting machine, by magnetic deflection and attraction jacks each coacting with one needle, towards the one or the other of the two pole faces of a magnet.
  • the invention also relates to a device for carrying out this method, said device comprising a magnet having an air gap through which the jacks are adapted to travel in succession and a control electromagnet having a winding connected to a source which supplies electric impulses in accordance with a predetermined program.
  • the object of an individual selection for example of needles of a knitting machine, is the successive and continuous separating of the needles into active and inactive needles, in order to knit patterns resulting from different types of stitches, or from the use of threads of different colors in Jacquard patterns, or even from stitch transfer in fashioned knit fabrics.
  • Such selection is generally made by means of jacks guided in grooves which are provided in a part of the machine.
  • the selection consists in an individual control of the jacks to be placed into or out of operation.
  • Dependent on the type of the machine the jacks travel in succession in front of a selector device, or this device is movable with respect to the stationary jacks.
  • a counter force is generally applied, counteracting the magnetic attraction force, in order to prevent the not selected jacks from leaving their inoperative position.
  • This retaining force is usually obtained by suitable mechanism having one or a plurality of springs, or using the frictional resistance of the jacks in their guiding grooves or even the own weight of the jacks.
  • the mechanism for adjusting the equilibrium between the different forces acting on the jacks has the disadvantage to be very susceptible to wear, dirt, and to mechanical vibrations resulting from normal operation of a knitting machine.
  • These devices have furthermore the disadvantage of allowing only a very short selection path. Thus the locking of the movable members in selected position by the known methods is quite unreliable.
  • FIGURE 1 is a sectional view of a device according to the invention and of a portion of the cylinder of a circular knitting machine comprising needles and jacks.
  • FIGURE 2 shows the position of a jack when leaving the device of FIGURE 1, after having been selected to be placed out of operation.
  • FIGURE 3 shows the position of a jack when leaving the device of FIGURE 1 after having been selected to be placed in operation.
  • FIGURE 4 is a vertical section on the line IV-IV of FIGURE 1.
  • FIGURE 5 is a section on the line V-V of FIGURE 4.
  • FIGURE 6 is a vertical section similar to that of FIG- URE 1, showing a modification of the invention.
  • FIGURE 7 is a section on the line VIIVII of FIG- URE 6.
  • the selector device comprises a magnet, an electromagnet and a support 7, made of nonmagnetic material.
  • the support 7 forms a portion of the frame of the knitting machine.
  • the magnet is provided with two pole pieces 1 and 2 having pole faces 15 and 16 adapted to contact the jacks, a core 3 and two identical windings 4 adopted to be connected to a directcurrent source, to provide a steady magnetic field.
  • the control electromagnet comprises a core 5 fixed to the center of the core 3 and a winding 6 adapted to be connected to a source of electric impulses polarized in accordance with a predetermined program.
  • the represented portion of the cylinder 8 of a circular knitting machine comprises conventional vertical grooves 9 in which are guided jacks 10 and needles 11 movable in axial direction.
  • Each jack is provided with a head 12 forming a fulcrum to permit a pivoting movement of the jack in its groove, and with a projecting butt 13 cooperating with a member of the knitting machine, e.g. a lifting cam 14, adapted to impart an axial displacement to the jack when the latter has been selected to be put in operation.
  • FIGURE 3 shows the position of jack when it leaves the selector device, after having been selected to be put in operation, ie a position in which the lug 13 can cooperate with the cam 14, so as to produce a lifting movement of the jack and its corresponding needle 11.
  • FIGURE 2 shows the position of a jack after it has been selected to be put out of operation, i.e. into a position in which the lug 13 can not be actuated by the cam 14.
  • FIGURE 4 shows the position of the jacks 10 moving in the direction of arrow 17 within the air gap of the magnet formed between the pole pieces 1 and 2; the lower end of the jacks passes in proximity of the core 5 of the control electromagnet.
  • FIGURE 5 shows the guide slot for the passage of the jacks 10, said slot being formed between the pole faces 15 and 16 of the pole pieces 1 and 2 of the magnet.
  • the opposite faces of the slot first converge to a point of constriction and then diverge again.
  • the jacks are in close proximity of the two pole faces as well as of the end of the core 5 of the electromagnet. This latter is adapted to deflect the jacks against one or the other of the two pole faces 15 and 16, depending on the predetermined program.
  • the described selector device operates as follows:
  • the cylinder 8 of the knitting machine is rotating in the direction of the arrow 17 (FIG. 5), whereby all the jacks 10 carried by the cylinder are successively engaged between the pole pieces 1 and 2 of the magnet. They are maintained in contact with the faces 15 or 16 by the magnetic forces exerted on them during the whole period of their passage between the two faces. At the point of constriction 18 each jack passes into the zone of action of the control electromagnet.
  • the magnetic field of this electromagnet locally produces a state of disequilibrium of the magnetic forces of attraction acting on the jacks, in the pole face gap at the point of constriction, thereby deflecting each jack towards one or the other of the pole faces of the magnet, corresponding to the polarization which it receives in accordance with the predetermined program.
  • the diverging pole faces, after the point of constriction of the gap, form a widening of the passage way for the jacks and therefore amplify the course of deflection of the jacks obtained owing to the magnetic attraction forces applying the jacks against one or the other of the opposite inclined faces 15 and 16.
  • the jacks are exclusively actuated by magnetic forces; accordingly, no wear of additional mechanical members, such as springs or brake members, is possible, as would result from friction of the jacks in their grooves.
  • the point of constriction 18 of the pole faces in the zone of action of the control electromagnet may be such that there is only a small clearance between the two faces i5, 16 and a jack passing therethrough; this reduces the amount of deflection and the time required for effecting this deflection to very small values.
  • a selector device according to the present invention can operate at very high speeds, and may be applied to knitting machines of any type as well as to other machines where a quick selection of similar operating members is required.
  • the magnet 1, 2 may be constituted of one or a plurality of permanent magnets, made egg. of ferrite, for providing a steady magnetic field.
  • the method and selector device according to the invention allow constructions which are symmetrical with respect to an axis perpendicular to the axis of movement of the jacks and passing through the center of the core of the electromagnet. It results therefrom that such a device can effect an individual selection of jacks moving through the slot between the pole face in one or the other direction of movement.
  • This particular feature of the invention makes it possible to use the selector device with flat knitting machines of the reciprocatory type.
  • the invention is not limited to a selector device applied to the cylinder of a circular knitting machine, but the device may also be applied to a plate thereof.
  • control electromagnet comprises two different windings adapted to be connected to a source delivering impulses alternatively to one or the other wind- 4 ing depending on a predetermined program, so as to polarize the electromagnet in two different directions.
  • control electromagnet may be arranged outside of the other magnet in order to cooperate with one of the lateral faces of the jacks (see FIGURES 6 and 7).
  • the device comprises a magnet, an electromagnet and an alignment cam.
  • the permanent magnet 21 is provided with pole members 1 and '2 in the air gap of which pass the jacks 10 between the pole faces 15 and 16.
  • the electromagnet arranged, outside of the magnet comprises a horseshoe-shaped core 25 with inclined pole faces for the deflection of the jacks and a winding 6 connected to a source adapted to deliver impulses in accordance with a predetermined program.
  • the cam 19 is arranged to deflect the jacks and to align them all against the pole face 16.
  • FIGURES 6 and 7 operates as follows:
  • a device for the individual operation of the needles of a knitting machine by controlling the jacks a magnet providing a steady magnetic field, said magnet having a pair of pole faces separated by an air gap in which the two opposite pole faces of said magnet form a constricted passage of the path of travel of said jacks along said portion of the air gap; an electromagnet that can be polarized by electric pulses in accordance with a predetermined program, said electromagnet being located adjacent a portion of said jack and with respect to said air gap that polarization of the electromagnet causes a disequilibrium of the magnetic forces acting on a jack while it passes along a portion of the air gap, whereby a jack passing through said portion of the air gap when the electromagnet is polarized is attracted to a pole face of said magnet and is held to the face by magnetic attraction.
  • a device as claimed in claim 1, in which the parts of the device are symmetrically arranged to be operative in combination with jacks travelling in one or the other of two opposed directions of movement, so that the device can be applied to fiat knitting machines of the reciprocating type.
  • said jacks having each a lateral face; means for causing all of said jacks to bear against the same one of said pole faces as they enter said air gap; said electromagnet being located adjacent said lateral face to attract a jack, when said electromagnet is fed a pulse, to cause that jack to be brought from said one pole face to the other pole face of said magnet, where the jack is held by magnetic attraction.
  • a device wherein the movement of a jack to a pole face is pivotal.
  • a device including the cylinder of a circular knitting machine; each jack having a head portion; grooves in said cylinder, for guiding said jacks and supporting said jacks by their heads for pivoting.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US344754A 1963-02-14 1964-02-13 Method and device for the individual control of selecting members Expired - Lifetime US3283541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH188363A CH396284A (fr) 1963-02-14 1963-02-14 Procédé pour la sélection individuelle d'organes d'une machine, notamment pour la sélection individuelle des aiguilles d'une machine à tricoter, et dispositif pour la mise en oeuvre de ce procédé

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CH (1) CH396284A (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365916A (en) * 1965-03-02 1968-01-30 Morat Kg Franz Selector magnetic arrangement for knitting machines
US3365917A (en) * 1964-03-28 1968-01-30 Morat Gmbh Franz Needle control apparatus
US3449928A (en) * 1965-03-06 1969-06-17 Morat Gmbh Franz Selector apparatus for circular knitting machines
US3457734A (en) * 1965-03-30 1969-07-29 Scott & Williams Inc Knitting machines
US3461690A (en) * 1966-02-28 1969-08-19 Mayer & Cie Maschinenfabrik Pattern device for circular knitting machines
US3472287A (en) * 1965-10-29 1969-10-14 Morat Franz Control device for textile machines
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
US3518845A (en) * 1966-11-14 1970-07-07 Dubied & Cie Sa E Selecting device for individual selection of the knitting tools in very fine gauge knitting machines
US3534566A (en) * 1967-12-01 1970-10-20 Wildt Mellor Bromley Ltd Patterning mechanism for knitting machines
US3653229A (en) * 1968-09-07 1972-04-04 Mayer & Cie Maschinenfabrik Pattern installation for circular knitting machines
JPS4891360A (fr) * 1971-11-06 1973-11-28
US3834187A (en) * 1971-06-18 1974-09-10 Elitex Zavody Textilniho Cam system for double cylinder knitting machine
US3851500A (en) * 1971-04-19 1974-12-03 Rockwell International Corp Circular knitting machine needle selecting apparatus
US3863465A (en) * 1970-02-10 1975-02-04 Cerjat Aymon De Electro-magnetic selection device for the needles of a knitting machine
US3885404A (en) * 1971-06-21 1975-05-27 Elitex Zavody Textilniho Apparatus for patterning knitting machines
US3948062A (en) * 1973-08-15 1976-04-06 Precision Fukuhara Works, Inc. Electronic needle selecting means for circular knitting machines
US3971233A (en) * 1973-11-22 1976-07-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Circular knitting machine with pattern producing devices
US3987646A (en) * 1972-01-10 1976-10-26 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Magnetic actuator construction for a circular knitting machine
US4030319A (en) * 1975-04-24 1977-06-21 Superba S.A. Domestic knitting machine
US4688404A (en) * 1985-01-31 1987-08-25 Sulzer Morat Gmbh Electromagnetic patterning system on a knitting machine
US4901541A (en) * 1987-04-20 1990-02-20 Okuma Machinery Works Ltd. Needle selector for knitting machine
US4905484A (en) * 1987-04-14 1990-03-06 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Multisystem circular knitting machine having electromagnetic needle selection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB883432A (en) * 1957-12-16 1961-11-29 Macqueen Cybernetics Ltd Improvements in or relating to knitting machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB883432A (en) * 1957-12-16 1961-11-29 Macqueen Cybernetics Ltd Improvements in or relating to knitting machines

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365917A (en) * 1964-03-28 1968-01-30 Morat Gmbh Franz Needle control apparatus
US3365916A (en) * 1965-03-02 1968-01-30 Morat Kg Franz Selector magnetic arrangement for knitting machines
US3449928A (en) * 1965-03-06 1969-06-17 Morat Gmbh Franz Selector apparatus for circular knitting machines
US3457734A (en) * 1965-03-30 1969-07-29 Scott & Williams Inc Knitting machines
US3472287A (en) * 1965-10-29 1969-10-14 Morat Franz Control device for textile machines
US3461690A (en) * 1966-02-28 1969-08-19 Mayer & Cie Maschinenfabrik Pattern device for circular knitting machines
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
US3518845A (en) * 1966-11-14 1970-07-07 Dubied & Cie Sa E Selecting device for individual selection of the knitting tools in very fine gauge knitting machines
US3534566A (en) * 1967-12-01 1970-10-20 Wildt Mellor Bromley Ltd Patterning mechanism for knitting machines
US3653229A (en) * 1968-09-07 1972-04-04 Mayer & Cie Maschinenfabrik Pattern installation for circular knitting machines
US3863465A (en) * 1970-02-10 1975-02-04 Cerjat Aymon De Electro-magnetic selection device for the needles of a knitting machine
US3851500A (en) * 1971-04-19 1974-12-03 Rockwell International Corp Circular knitting machine needle selecting apparatus
US3834187A (en) * 1971-06-18 1974-09-10 Elitex Zavody Textilniho Cam system for double cylinder knitting machine
US3885404A (en) * 1971-06-21 1975-05-27 Elitex Zavody Textilniho Apparatus for patterning knitting machines
US3861173A (en) * 1971-11-06 1975-01-21 Kinkelin Wolf Dieter Apparatus for control of needle pushers
JPS4891360A (fr) * 1971-11-06 1973-11-28
US3987646A (en) * 1972-01-10 1976-10-26 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Magnetic actuator construction for a circular knitting machine
US3948062A (en) * 1973-08-15 1976-04-06 Precision Fukuhara Works, Inc. Electronic needle selecting means for circular knitting machines
US3971233A (en) * 1973-11-22 1976-07-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Circular knitting machine with pattern producing devices
US4030319A (en) * 1975-04-24 1977-06-21 Superba S.A. Domestic knitting machine
US4688404A (en) * 1985-01-31 1987-08-25 Sulzer Morat Gmbh Electromagnetic patterning system on a knitting machine
US4905484A (en) * 1987-04-14 1990-03-06 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Multisystem circular knitting machine having electromagnetic needle selection
US4901541A (en) * 1987-04-20 1990-02-20 Okuma Machinery Works Ltd. Needle selector for knitting machine

Also Published As

Publication number Publication date
CH396284A (fr) 1965-07-31
DE1585001B2 (de) 1975-08-28
DE1585001A1 (de) 1970-04-09

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