US2585804A - Straight bar knitting machine - Google Patents

Straight bar knitting machine Download PDF

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Publication number
US2585804A
US2585804A US77836A US7783649A US2585804A US 2585804 A US2585804 A US 2585804A US 77836 A US77836 A US 77836A US 7783649 A US7783649 A US 7783649A US 2585804 A US2585804 A US 2585804A
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US
United States
Prior art keywords
bar
needles
loops
bars
needle
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
US77836A
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English (en)
Inventor
Lynam John Edward
Brown Leonard
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.)
William Cotton Ltd
Original Assignee
William Cotton Ltd
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 William Cotton Ltd filed Critical William Cotton Ltd
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Publication of US2585804A publication Critical patent/US2585804A/en
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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
    • H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B11/00—Straight-bar knitting machines with fixed needles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube

Definitions

  • This invention concerns 'straight-bar knitting machines organized for the production-of ladderresistant knitted fabric of the type wherein'loops are passed through and closely around other loops. Such fabric is described and claimed in British patent specifications 329;098-and 422,779.,
  • the invention therefore provides a straight bar knitting machine organized for the production of ladder-resistant fabric of the type specified, having two needle bars keyed together for relative movement in the direction of 'the length of the needle stems, separate means for imparting said movement to each bar; and'common means for imparting movement transversely of-the'length of the needle stems to both bars in unison.
  • An advantage of this arrangement in addition to its simplicity, is that the movements of the two sets of needles are facilitated; moreover the arrangement permits one set of needles readily to' be brought to a lowered inoperative position while plain fabric is being knitted on the upper set of needles without it being necessary "to employ sinkers having nebs that are'longer than is customary in straightbar knitting machines 'organg ized for knitting plain fabric.
  • the needle bar operating means comprises one set of cams which are operative while ladder-resistant fabric is being produced and an alternative set of cams which are operative while plain (i.'e. unlocked) fabric is being produced.
  • the machine may also have the features set out in the co-pending' patent applications Serial Numbers 24,354, 43,834, and 44,184.
  • Figure 1 is a general sectional view of a-machine incorporating two needle bars and-operating mechanism according to this invention.'-
  • Figure 2 is a detail view of'one of the-needle bars and operating mechanism shown in Figure -1 and, inparticular, shows the commo'nmeans for from the presser.
  • g i Figure 3 is a detail View of the other needle bar and operating mechanism shown in Figure ,1.
  • Figure 4 is an enlarged cross needle bar mountings.
  • the machine illustrated isorganized for the production of fabric of the type specified and in the manner described with reference to' Figures '18 to 26 of British patent specificationfiNo. 527,234 (and of United States Patent specification No. 2,312,903) andaccordingto the. present invention the two needle bars are keyedutogether for relative movement in the dire'ction of the length of the needle stems, separate means being provided for imparting said movement to each bar, and common means beingprovided for imparting movement transversely of the-length of the needle stems to both bars in unison; "Forthis purpose the rear needle bar I carrying needlesf (Figures 1, 2, 4, 5 and 6) is provided with a pair of vertical guideways 3 (constituting-afemale part) for the reception of a pair of slide members 4 (constituting a malepart) depending from the front needle bar 5.
  • the needle bar 5 is mounted for pivotal movement about an axis 6 for inspection or repair purposes, said axle 6 being carried by lugs l adjustably carried-by the slide-"members 4*; the needle bar is releasably held in its operative position by means of thumb screws 9 co-Operating with it and'with fixed end plates l0-( Figures'4 and 5).
  • the slide members l are provided at their lower ends with rearwardly extended bifurcated lugs H 'which' embrace square spindles l2 freely rotatable inthe rear ends of arms l3 fixed to a shaft [4 by bo1ts l5 ( Figures 3 and 5);
  • the shaft M has also fixed to it a rocker armlfi having a truck ll' at its the presser, the needle bar I has' fixed to i-t-an arm 3i to the lower end of which a-h'and -lever 32 is pivotally connected at --5 l;' this hand lever is formed :with notches 33-co-operating'with a peg 34 projecting laterally from an'arm 35 fixed to a shaft 36 and also fixed to the shaft 36 there is a truck arm 31 which carries a truck 38 cooperating with a cam 39 fixed on the main cam shaft I9. effect the desired motions particularly by parts 40 to 44 thereof as hereinafter more
  • This cam 39 is suitably shaped to For the purpose of imparting vertical motion to the needle bar I the said bar is pivotally connected at its lower end, at 55, .to a pairof rocking arms 45 which are freely mounted on the shaft I4. Also freely mounted on this shaft I4 there is a truck arm 46 which is keyed to the rocker arms 45 by a key 4'! ( Figure 5) and which carries at itslower end a, truck 48 co-operating with a I cam 49 on the main shaft .I;9. 'The cam 49 is level than those of the front set. The needles 8 of the front set of course produce the'main loops and the needles 2 of the rear set produce the locking loops.
  • the aforesaid cam 3.3 serves to rock the shaft 36 which is the press shaft and the latter,
  • the pivotal connections I2, 55 will not have a common axis at all times.
  • the hand lever 32 is capable of being disconnected from the press lever 35 (and consequently from the truck arm 31) in the, usual manner so that the needle bars may be swung in unisonaway from the presser and this movement also taking place about the said pivotal connections,
  • cams either have one half of their peripheries plain and the other half like the plain stitch parts of the lockingcams I8, 39 and 49, or they have such plain stitch parts on each half so that two courses of stitches are produced for each revolution of the cams.
  • the arrangement of these cams isas described incopending patent application Serial No. 43,834, and in Fig. 3 they are indicated at 60; the shogging mechanism is of the conventional form inherent in all straight bar knitting machines.
  • both needle bars I and 5 are raised (cam I8, part 23 and cam 49, part I50) and during such movement the upper ends of the needles of bar I are pressed (either by horizontal movement of the bars to auxiliary presser means or by movement of auxiliary presser means to the needles) into grooves in the shanks of the needles of bar 5 so that the last loops to be formed (and hereinafter referred to as plain loops) are pierced by said needles of bar I (cam I8, part 24 and cam 49, part I55). Both needle bars. continue to be raised (cam I8, part 25 and cam 49,- part I52) to their highest positions whereat a locking yarn is fed and sunk around the shanks of both needles.
  • Both needle bars are then lowered (cam I8, part 26, cam 43, part I53) and advanced horizontally so that the beards of the bar I are pressed (cam 39, part 42) when the said locking yarn is behind the beards of the needles of bar I. Further lowering of both bars follows so that the plain loops are landed on said beards and are eventually knocked over the beards and over the locking yarn so that looking loops are formed of said locking yarn (cam I8, part 28 and cam 49, part 5
  • Both bars are then again lowered (cam I8,'part 29, cam 53, part I54) and advanced horizontally so that the beards of the bar I are pressed (cam 39, part 42) to permit the locking loops being knocked over the needles of barI onto the needles of bar5 and the relative lowering movement of the two bars is such that at the said knock-over the locking loops are knocked over .onto the beards of the needles of bar 5 while the said plain loops are behind the said beards. Both bars are then lowered to their lowest position whereat the locking loops are knocked over the needles of bar 5 and then extend through and around the said plain loops (cam I8, part 30, cam 49, part 52).
  • a straight bar knitting machine organised for the production of ladder resistant fabric of the type comprising successive ground courses of plain loops whereof the loops of each ground course are drawn through the plain loops of the preceding course, and associated courses of locking loops which look the plain loops, the locking loops being passed through and closely around the plain loops so that the legs of the plain loops are encircled by coils of the locking loops having two needle bars keyed together for relative move- I ment in the direction of the length of the needle stems each of which needle bars is equipped with the said needles and the needles in one bar being located with their stems in front of and aligned with the stems of the needles of the other bar and with their hooks disposed in the same direction, separate means for imparting said movement to each bar, and common means for imparting movement transversely of the length of the needle stems to both bars in unison.
  • needle bars constitute front and rear bars, one of which bars has at least one male part slidable vertically in a female part of the other bar
  • said separate means consists of separate cam operated lever mechanisms which are pivotally connected respectively to the needle bars
  • said common means consists of further cam operated lever mechanism connected to one of the bars, preferably the front needle bar.
  • locking loops being passed through and closely around the plain loops so that the legs of the plain loops are encircled by'coils of the locking loops, and having front and rear needle bars, hooked needles in one bar for knitting the plain loops and hooked needles in the other bar for knitting the locking loops, said needles in the front bar being aligned in front of the needles of the other bar and all the needles having their hooks directed towards the rear, the combination of means keying the two bars together for relative movement in the direction of the length of the needles, cam-operated lever mechanisms, one for each bar, for efiecting said movements in the production of plain loops on the needles of one bar and locking loops on the needles of the other bar, pivotal connecting means for conmeeting said mechanisms to the respective bars, common operating means, comprising further cam-operated lever mechanism connected to one bar, for imparting movement transversely of the length of the needles to both bars in unison, and manually-operable means for effecting simultaneous pivotal movement of both bars in a direction
  • a machine according to claim 5 having manually-operable means for swinging the front bar out of operative position, away from the rear bar, and readily-releasable means for locking the front bar in operative position.
  • a machine having a cam and a truck lever connected to the rear needle bar for imparting to it motion lengthwise of the needles, a cam and a truck lever connected to the rear needle bar for imparting to both bars motion transverse to the length of the needles, and mechanism for imparting to the front needle bar motion lengthwise of the needles
  • cam and a truck lever connected to the rear needle bar for imparting to both bars motion transverse to the length of the needles
  • mechanism for imparting to the front needle bar motion lengthwise of the needles whichmechanism comprises a pair of substantially-horizontal rock arms connected to said front bar, a truck lever for rocking said arms, and a cam for rocking the truck lever.
  • a machine having a truck on each truck lever, two alternative sets of cams one set for imparting the requisite movements to the needle bars for producing the runresistant fabric and the other set for imparting to the front bar, without movement of the rear bar in the direction of the length of the needles, movements requisite for producing plain fabric on the needles of the front bar, each alternative set comprising an alternative cam for each truck lever, and means for effecting relative shogging movement between the trucks and the cams and for thereby changing over between the two sets, thereby to produce run-resistant or plain fabric at will.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Knitting Machines (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
US77836A 1946-05-10 1949-02-23 Straight bar knitting machine Expired - Lifetime US2585804A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB269321X 1946-05-10
GB280147X 1948-02-21

Publications (1)

Publication Number Publication Date
US2585804A true US2585804A (en) 1952-02-12

Family

ID=26258515

Family Applications (1)

Application Number Title Priority Date Filing Date
US77836A Expired - Lifetime US2585804A (en) 1946-05-10 1949-02-23 Straight bar knitting machine

Country Status (5)

Country Link
US (1) US2585804A (fr)
CH (2) CH269321A (fr)
DE (1) DE854985C (fr)
FR (2) FR945236A (fr)
GB (2) GB611858A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968162A (en) * 1931-07-27 1934-07-31 Nebel Max Flat knitting machine
DE604654C (de) * 1932-07-22 1934-10-29 Max Nebel Flache Kulierwirkmaschine
US2312903A (en) * 1938-04-05 1943-03-02 Hirt Walter Ladderproof knitting

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968162A (en) * 1931-07-27 1934-07-31 Nebel Max Flat knitting machine
DE604654C (de) * 1932-07-22 1934-10-29 Max Nebel Flache Kulierwirkmaschine
US2312903A (en) * 1938-04-05 1943-03-02 Hirt Walter Ladderproof knitting

Also Published As

Publication number Publication date
GB654094A (en) 1951-06-06
FR993566A (fr) 1951-11-02
CH280147A (fr) 1952-01-15
GB611858A (en) 1948-11-04
CH269321A (fr) 1950-06-30
DE854985C (de) 1952-11-10
FR945236A (fr) 1949-04-28

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