US3885404A - Apparatus for patterning knitting machines - Google Patents

Apparatus for patterning knitting machines Download PDF

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Publication number
US3885404A
US3885404A US263650A US26365072A US3885404A US 3885404 A US3885404 A US 3885404A US 263650 A US263650 A US 263650A US 26365072 A US26365072 A US 26365072A US 3885404 A US3885404 A US 3885404A
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United States
Prior art keywords
control means
control
butt
selecting
needle cylinder
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Expired - Lifetime
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US263650A
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English (en)
Inventor
Pavel Zahradka
Jiri Hrabanek
Milan Petranek
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Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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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

  • the present invention relates to apparatus for selecting needles of a circular knitting machine for pattern- [30] Foreign Application Priority Data 57 June 21, 1971 Czechoslovakia 4576-71 [52] US. Cl. 66/50 R; 66/154 A in according to a predetermined patterning p ram.
  • the apparatus udes control means located in the [58] Fleld of Search 154 50 longitudinal grooves of the needle cylinder which 66/50 50 25 comprises two parts movable with respect to each other, whereby one of such parts only is retained in References cited the lower portion of the groove whereas the other part UNITED STATES PATENTS cooperates with a cam system, upon selection accord- 3,283,541 11/1966 De Ccrjat 66/50 R ing to the patterning program, and effects the desired 3,365,916 1/1968 needle movement.
  • the present invention relates to a device for selecting needles for patterning, particularly in a circular knitting machine, and includes means, preferably an electromagnet, whereby the control means, e.g., control sinkers, arranged together with the knitting needles in the longitudinal grooves of a rotary needle cylinder are selectively controlled.
  • control means e.g., control sinkers
  • a movable electromagnet armature is used. It is made in the form of a hammer for pressing the selected needle jacks into the range of the inclined surfaces of sinker cams which then perform the selection of the needles attached thereto for the purpose of patterning.
  • this device cannot readily effect the desired arbitrary selection of needles, particularly upon a finer gauge of needle cylinder with its higher rotational speeds.
  • a recent known device of that type uses a patterning wheel with needle jacks selected by an electromagnet, each jack being under the influence of tensioned springs which displace the selected jacks according to the pattern, also by means of an electromagnet.
  • This device requires a large space and thus cannot be used in multi-feed knitting machines. Further, this device, because it is based on the principle of individual springs and the resiliency of said springs as well as the displacement of jacks, thus suffers from a relatively high probability of failures requiring constant operator attention.
  • Another recent device which also uses stationarily mounted electromagnets for selecting auxiliary sinkers which are displaced individually according to a patterning template in such manner, that they are radially drawn out from the longitudinal groove of the needle cylinder into the vicinity of a V shaped recess in the cam housing.
  • the disadvantage of this device lies primarily that in view of the high velocity of rotation of the needle cylinder it is not always possible to obtain a perfect and thus sufficient radial displacement of the auxiliary sinkers, this being, however, a required condition for a correct contact of the selected sinker on to the lifting surface of the cam and for a correct selection of the attached needle to the patterning.
  • One of the most recent devices of the above type is characterized in that in the cam system, as e.g., in the central and lower cam ring, a recess is made for inserting the butts of auxiliary sinkers into operative position in a direction parallel to the movement of needles in response to electromagnetic pulses which are exerted by the extensions of an electromagnet upon the control butts of the auxiliary sinkers.
  • the disadvantage of that device consist in that even when that device works reliably, considerably stron magnetic pulses must be developed by the extensions of the selecting electromagnets upon the control butts of the auxiliary sinkers. This requires the use of selecting electromagnets of considerable dimensions and this, of course, is a disadvantageous aspect of the modern design of knitting machines.
  • applicant provides a two-component movable control means comprising upper and lower parts acting upon each other at the point of selection in such manner that the upper parts are under the influence of an elastic element, e.g., a cylindrical spring surrounding the outer circumference of the needle cylinder, and the lower parts are under the influence of either magnetic pulses from the selecting extension of an electromagnet, or equivalent retaining means with a controlling ability, at least one of the components of the control means being provided with a control butt which cooperates with the cam system of a knitting machine.
  • an elastic element e.g., a cylindrical spring surrounding the outer circumference of the needle cylinder
  • FIG. 1 represents a partial front view of the cam system on a two cylinder circular knitting machine, the most important cam parts being also represented, which cooperate with the control means upon their selection for selecting needles for the purpose of patternmg;
  • FIG. 2 depicts a longitudinal partial section in the plane of section 2-2 of FIG. 1, through a part of the needle cylinder and the cam housing and shows the position of the selecting extension of an electromagnet and the two part control means at the moment of starting selection, this representation of the drawing being identical with the case, in which no selection at all was performed, i.e., when the control means pass through the selecting point without being influenced by the magnetic effects of the said selecting extension of the electromagnet;
  • FIG. 3 illustrates an analogous longitudinal section as shown in FIG. 2 except that the longitudinal section is made in the point of plane 33 as shown in FIG. 1 said view representing from the viewpoint of function a situation which, on the basis of a magnet pulse from the selecting extension of the electromagnet, the control means is selected into such a position, that the attached needle is selected for the purpose of patterning;
  • FIG. 4 is a view similar to FIGS. 2 and 3, except that this section is made in the plane 44 as shown in FIG. 1 and represents, from the viewpoint of function, a situation whereby the control means is finally selected into the operative position;
  • FIG. 5 is taken along plane 44 of FIG. 1 and illustrates a situation where the control means was not selected for controlling the appurtenant needle, i.e., when the control means passed the point of selection without the effect of a magnetic pulse from the selecting extension of an electromagnet;
  • FIG. 6 is a detailed enlarged view of the point of selection in view of the mass relations of the major design elements.
  • FIGS. 7 and 8 are longitudinal section views made through the upper and lower needle cylinder of the double cylinder circular knitting machine.
  • the known circular knitting machines e.g., machines used for the manufacture of hosiery, of both the one and two cylinder type, are usually made in such manner that about the needle cylinder, or the two needle cylinders, the separate cam means for controlling needles,
  • FIG. 1 of the accompanying drawings there is shown the cam system for the lower needle cylinder of a two cylinder knitting machine at the selecting point for patterning.
  • This cam system consists of a lower stationary cam ring 2, in the lower edge of which and at the selecting point, there is provided a recess 3, below which recess 3 emerges the selecting extension 4 of an electromagnet.
  • the upper edge of said lower stationary cam ring 2 is, at the point above the selecting extension of the electromagnet provided with a lifting edge 5, which is continued by a rising cam 6 having a rising edge 6a.
  • an extensible cam 7 is arranged behind the selecting point.
  • Above all of the noted cams there is situated a stationary cam ring 8, in the upper part of which is groove 8a.
  • operative sinkers (not shown) which are controlled by guiding cam 9, above which is arranged a radially displaceable cam 10, of which operative cam 11 is an extension which is already shifted into the recess in a further stationary cam ring 12.
  • a further cam ring 13 Above the stationary cam ring 12 is mounted a further cam ring 13.
  • the known upper control butts of the operative sinkers upon selecting the attached needles, for the purpose of patterning, move along path 14, whereas the lower butts of said operative sinkers are moved along path 15.
  • the control means by which the selection is performed through magnetic pulses from the said extension of the electromagnet consists essentially of a two part control sinker.
  • the sinker is provided with a control butt 16 (FIG.
  • FIG. 1 shows the path of control butt 16 through the cam system or the purpose of patterning. That path is denoted by reference number 22.
  • the movement of the said control butts by the cam system is performed in accordance with the rotation of needle cylinder 20 (FIG. 2) i.e. in the direction of arrow S (FIG. 1).
  • the upper parts 17 (FIG. 2) of the control sinkers are provided at their lower ends with a chamfered sinkers are provided at their lower ends with a chamfered portion 23 and finally terminate in a depending terminal finger 24.
  • the centres of the upper parts 17 are tapered as at 25.
  • the upper part 17 can be slid into a conically tapering longitudinal recess 26 in the stationary cam ring 8 against the action of spring 21.
  • the lower parts 18 of the two-component control sinkers are longitudinally shaped so as to present a complementary face underlying the adjacent face of upper part 17.
  • the lower parts 18 are provided on their lower ends with selecting butts 27 which cooperate with a selecting extension 4 of the electromagnet at the selecting point.
  • the needle cylinder 20 below the longitudinal grooves 19 is provided with an antimagnetic ring 28.
  • the width of the longitudinal recess 26 in the stationary cam ring 8 has a dimension t -2t (FIG. 6), the width of the control butt 16, 16 of the sinkers having the dimension t
  • the device of this invention operates substantially as follows:
  • control sinkers are brought to the selecting point by rotation of the cylinders in the direction of arrow S in the relative position shown in FIGS. 2 and 5.
  • the upper part 17 and the lower part 18 of the control sinkers are mutually assembled, and the selecting butts 27 with their lower edge contact the upper edge of the selecting extension 4 of the electromagnet.
  • control butt 16 contacts the initial part of the lifting edge 5 of the lower stationery cam ring 2.
  • the upper part 17 takes up a position in which its control butt 16, upon advancement of cylinder 20 in the direction of arrow S, contacts the lifting edge 6a of lifting cam 6 and is raised so as to lift the operative jack mounted thereabove without the effect of the lower control butt upon cam 10 which is, upon selection for patterning, moved away from needle cylinder 20.
  • the bottom butt of the operative jack comes into contact with operating cam 11, which finishes the required path of the operating jack in such manner, as to bring about patterning by means of the attached needle, i.e., as shown by paths 14 and 15.
  • control butt 16 of the control sinker Upon reaching the highest position of control butt 16 of the control sinker, or of its upper part 17, respectively, said control butt 16 is again retracted by the influence of an edge of stationary cam ring 8 in such manner, that upon reaching the lower level, the control sinker is again in its assembled basic position and is again ready to be actuated.
  • Apparatus for selecting needles of a circular knitting machine for patterning according to a predetermined patterning program said knitting machine including at least one rotatable needle cylinder provided with circumferentially spaced axially parallel longitudinal grooves in which are located said needles and control means slidable within said grooves and adapted to effect movement of said needles according to said patterning program at a predetermined selection point, said selecting apparatus comprising a control means in each of said grooves having separate upper and lower parts, said upper and lower parts being independently slidable axially within the associated groove with respect to each other and capable of limited pivotal movement within said groove with respect to each other about an intermediate portion of each of said parts, at least one of the parts of said control means being provided with a control butt adapted to be actuated by a cam system radially spaced about said needle cylinder to axially raise said one part, spring means pivotally urging the upper portion of said upper part towards said needle cylinder to normally bias said control butt into engagement with said cam system, and an electromagnet
  • said cam system includes a first stationary cam ring which is provided at the selection point with a longitudinal recess extending from the top surface thereof downwardly and being adapted to receive the upper part of the control means when the same is raised by the cam system at the selection point, said first stationary cam ring also having a circumferential groove in which said spring means is seated, and a second and lower stationary cam ring being provided in radially spaced relationship about said needle cylinder having a cam track adapted to receive said control butt and to actuate same according to said patterning program.
  • Apparatus according to claim 2 wherein the upper part of said control means is provided with said control butt on the outer side thereof, the inner side of said part being provided at an intermediate region with a tapered portion, the lower end of said upper part having a chamfered portion which terminates in a depending finger, the lower part of said control means being provided with a selecting butt cooperable with said retaining means to hold said lower part in the lower region of said groove while the upper part is being moved upwardly and pivoted about said tapered portion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US263650A 1971-06-21 1972-06-16 Apparatus for patterning knitting machines Expired - Lifetime US3885404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS4576A CS166302B1 (fr) 1971-06-21 1971-06-21

Publications (1)

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US3885404A true US3885404A (en) 1975-05-27

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US263650A Expired - Lifetime US3885404A (en) 1971-06-21 1972-06-16 Apparatus for patterning knitting machines

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US (1) US3885404A (fr)
CS (1) CS166302B1 (fr)
DD (1) DD97232A1 (fr)
DE (1) DE2226763C3 (fr)
FR (1) FR2143219B1 (fr)
GB (1) GB1382496A (fr)
IT (1) IT956487B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068497A (en) * 1976-10-19 1978-01-17 Milliken Research Corporation Circular knitting machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007253A1 (de) * 1990-03-08 1991-09-12 Sipra Patent Beteiligung Strickmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283541A (en) * 1963-02-14 1966-11-08 Dubied & Cie Sa E Method and device for the individual control of selecting members
US3365916A (en) * 1965-03-02 1968-01-30 Morat Kg Franz Selector magnetic arrangement for knitting machines
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
US3638456A (en) * 1968-10-24 1972-02-01 Jumberca Sa Device for circular knitting machines
US3667254A (en) * 1970-04-06 1972-06-06 Warner Swasey Co Horizontal selector jacks and their actuation
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283541A (en) * 1963-02-14 1966-11-08 Dubied & Cie Sa E Method and device for the individual control of selecting members
US3365916A (en) * 1965-03-02 1968-01-30 Morat Kg Franz Selector magnetic arrangement for knitting machines
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
US3638456A (en) * 1968-10-24 1972-02-01 Jumberca Sa Device for circular knitting 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
US3667254A (en) * 1970-04-06 1972-06-06 Warner Swasey Co Horizontal selector jacks and their actuation
US3742733A (en) * 1971-06-04 1973-07-03 Warren & Swasey Co Knitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068497A (en) * 1976-10-19 1978-01-17 Milliken Research Corporation Circular knitting machine

Also Published As

Publication number Publication date
FR2143219B1 (fr) 1973-07-13
FR2143219A1 (fr) 1973-02-02
IT956487B (it) 1973-10-10
CS166302B1 (fr) 1976-02-27
DE2226763A1 (de) 1972-12-28
GB1382496A (en) 1975-02-05
DE2226763B2 (de) 1979-02-15
DD97232A1 (fr) 1973-04-23
DE2226763C3 (de) 1979-10-04

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