US3919863A - Electronic needle selecting means for circular knitting machines - Google Patents

Electronic needle selecting means for circular knitting machines Download PDF

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Publication number
US3919863A
US3919863A US415761A US41576173A US3919863A US 3919863 A US3919863 A US 3919863A US 415761 A US415761 A US 415761A US 41576173 A US41576173 A US 41576173A US 3919863 A US3919863 A US 3919863A
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United States
Prior art keywords
jacks
butts
jack
fulcrums
cam
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Expired - Lifetime
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US415761A
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English (en)
Inventor
Masatoshi Sawazaki
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Precision Fukuhara Works Ltd
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Precision Fukuhara Works Ltd
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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 jack aligning cam rocks all the jacks to bring their upper end butts in the path of a jack raising cam, magnetic means then holds the jacks in this position, then the force of the magnetic means is weakened to allow the electromagnetic means to rock selected jacks out of jack raising position, and then the magnetic means is strengthened to retain the nonselected jacks in their original position so that only the non-selected needles are raised by the jack raising cam.
  • the present invention relates generally to-the art of knitting and more particularly to improved electronic needle selecting meand for use upon circular knitting machines for the selective raising of the needles thereof.
  • the electronic needle selecting means of the present invention is of the type wherein the selection is made upon jacks which transmit the selection to theneedles and.wherein the jacks are directly selected by electronic force.
  • the jacks are of the rocking type having a fulcrum butt intermediate their ends and having a raise butt at the upper ends of the jacks.
  • Each of the jacks is also provided with an additional butt below its fulcrum butt, such additional butts being disposed at vertically spaced levels upon the alternate and the intervening ones of the jacks, and such additional butts serving as pole contactors for cooperation with the pole faces of a pair of vertically spaced control electromagnets by means of which the jacks are selected
  • FIG. 1 is a vertical sectional view taken through the needle cylinder, the surrounding cam ring,.and the associated parts of a multi-feed circular knitting machine showing the needles and the needle selecting jacks of the prsent invention in the cylinder slots,
  • FIGS. 2a and 2b are side elevational views of the rocking jacks used in the present invention to selectively raise the needles, the jacks being provided with electromagnetic selector butts or extensions at two levels, the butts being the upper level on the jacks of FIG.
  • FIG. 3 is a diagrammatic view in elevation of the cams, the electrostatic or permanent magnetic means,
  • FIG. 7 is a view similar to FIG. 6 showing the lower ends of jacks which have been selected by the control electromagnets of the present invention
  • FIG. 8 is a view similar to FIG. 3 as taken on line 88 thereof showing the jack in position to be selected by the electromagnetic means of the present invention
  • FIG. 9 is a view similar to FIG. 8 showing the jack after it has been selected by the electromagnetic means of the present invention, as appears on line 9-9 of FIG. 8.
  • FIG. 1 the electronic needle selecting means of the present invention is shown in position at a feed of a multifeed circular knitting machine of the rotary cylinder type wherein the periphery ofa cylinder 1 is provided with a series of adjacent vertically extending parallel slots 2 within each of which is positioned a needle 3. Alternate ones of the needles are disposed above alternate jacks 4 while the intervening needles are disposed above intervening jacks 7, the jacks also being in the slots.
  • the machine is provided with a nonrotating upper cam ring 31 and a lower cam ring 32, these cam rings serving to position the cams for operating the needles and jacks, and to position the electronic means for selecting the jacks and the needles.
  • the jacks 4 and 7, FIGS. 2a and 2b, extend lengthwise in the slots and are generally similar in having a butt 14 at their upper ends, a round nose butt l5 intermediate their lengths, and straight sided portions 11 at their lower ends, the jacks 4 and 7 not being similar in that they have butts 8 and 9 projecting therefrom at spaced levels, separate upper and lower levels respectively, between the butts l5 and the lower portions 11 of the jacks.
  • the butts 14 are raise butts by means of which designated ones of the jacks 4 and 7 are raised by a raise cam to raise the needles associated therewith, the butts 15 also serve as fulcrums about which the jacks 4 and 7 are adapted to be rocked, and the butts 8 and 9 are the upper and lower pole contactor butts by means of which the jacks 4 and 7 are to be selected by the electromagnetic means of the present invention.
  • FIG. 3 is shown the cams, permanent magnets, and electromagnets of the present invention which act upon the jacks 4 and 7 to provide for a selection among the same at each feed of the machine, these parts being positioned upon the stationary cam rings 31, 32 of the machine.
  • Raise cam 13 is provided with face 27 to engage butts 14 of selected jacks to raise the latter when they are positioned with their butts l4 projecting outwardly of the slots 2 and in the pathway of cam 13.
  • Such jack raising also raises the needles associated therewith and the usual cams (not shown) thereafter act upon the so raised needles.
  • the butts 15 travel in pathway 24 defined between cams 15a and 15b before the jacks are raised, the jacks being rockable about butts l5 acting as fulcrums within the pathway.
  • the pathway for butts 15 is discontinued to permit such raising and thereafter the jacks are lowered by the action of face 28 of cam 16 on butts 16 to place the jacks at a level wherein their butts 15 are at the level of pathway 24, for the next feed of the machine.
  • An aligning or leveling cam 10 the contour of which is evident in FIGS.
  • cam 10 acts to rock those jacks inwardly which have been selectively moved out- 3 wardly at the previous feed, it will also make certain that the remaining jacks are also bottommed in their respective slots.
  • An upper permanent magnet 34 having spaced pole pieces 19, 20, is positioned so that the latter magnetically engages with the passing jack butts 14, the pole pieces havingcentrally disposed and vertically aligned notches 21 and 22 therein, respectively, at which the magnetic force. exerted by the pole pieces upon the butts 14 is weakened or attenuated. While the jack butts lose contact with pole piece 19 as they pass by its notch 21, they remain in contact with pole piece 20 as they pass by its notch 22.
  • a pair of lower permanent magnets 18, 18a, spaced by a gap 23 which is vertically aligned with notches 21, 22, have the same contour as and are positioned below the central portion of cam 10, FIGS.
  • gap 23 underlies the trailing portion of edge 26 of cam 10, and that the magnetic attraction between the jacks and the permanent magnets 34, 18 and 18a is weakened as they pass by notches 21, 22 and gap 23 of the magnets, the jacks losing contact with magnets 18 and 18a as they pass by gap 23.
  • a pair of upper and lower vertically aligned control electromagnets 5 and 6 are supported by the cam ring so that their north and south pole faces 29, 30, respectively, are in spaced vertical alignment with and are spaced across the aligned notches 21, 22 and gap 23 of the permanent magnets.
  • the electromagnets are provided with coils 35 and 17 by means of which they are alternately selectively pulsed for desired jack and needle pattern selection by suitable programming means (not shown).
  • Pole faces 29, 30 are located above cam at levels corresponding to butts 8 and 9 of the jacks, so that, FIG. 4, upper butts 8 of jacks 7, in passing thereby, are each adapted to two dimensionally contact both pole faces 29 of upper electromagnet 5 while, FIG. 5, lower butts 9 ofjacks 4, in passing thereby, are each adapted to similarly contact both poles faces of lower electromagnet 6.
  • the jacks 4, 7 approach each feed of the machine at a common level with their butts in pathway 24.
  • Lower ends 11 of the jacks contact cam 10 and are pushed radially inwardly of the cylinder slots thereby rocking the jacks and moving their butts l4 radially outwardly where they'contact with and adhere to the pole pieces 19 and20 by magnetic force to stabilize the position of the jacks.
  • the jacks ends 11 at this time adhere to magnet 18 while jack butts l4 adhere to the pole pieces of magnet 34 by magnetic force thereby balancing the jacks in position to be raised by cam 13.
  • all of the jacks are held in balanced position by the magnetic attraction of upper magnet 34 and lower magnet 18, and in the event that no signal is given to either of the electromagnets, the upper magnet, acting through a weakened pole piece 20 (when the jacks are free from the magnetic attraction of magnet 18 and pole piece 19 of magnet 34) is sufficient to maintain the jacks in such position until pole piece 19 and the non-weakened portion of pole piece 20 add their magnetic attraction to the jacks to hold them in position to be raised by cam 13.
  • the pitch distance between two adjacent needles is 1.2 mm in terms of distance. While conventional electronic selecting systems having their electromagnets at a common level to act upon butts at a common level are unable to make individual jack selections upon such a 22 cut machine within the pitch distance of 1.2 mm, the system of the present invention is able to do so with ease since, in effect, the jack selection is done by two separate systems of which one is for the alternate jacks while the other is for the intervening jacks with each system thus being able to make its selection in a needle pitch distance of 2.4 mm.
  • the selection of individual jacks by conventional electronic selection systems must be made within a time period of 1.4 milliseconds, whereas with the system of the present invention the selection of individual jacks by each of the electromagnets may be made within a time period of 2,8 milliseconds. It follows that there is a greater allowance for possible error and mis-alignment of parts in the present invention and that it can be successfully be used upon machines of finer guages and upon machines operating at higher speeds.
  • An electronic needle selecting device for a circular knitting machine having a slotted needle cylinder and a circle of needles disposed in and independently movable lengthwise of said cylinder slots, a circle of jacks disposed in said cylinder slots below said needles and independently movable lengthwise of said slots to raise said needles, said jacks also being rockable in said cylinder slots about individual fulcrums intermediate their ends and having butts above their fulcrums, a jack raise cam to engage said jack butts to raise said jacks and said needles from a first to a second level, a jack aligning cam acting upon said jacks below their fulcrums to rock the jacks so that their said butts are moved radially outwardly of said cylinder slots into the path of said jack raise cam, selectively pulsed electromagnetic means thereafter acting upon said jacks below their fulcrums to rock selected ones of said jacks so that their butts are moved radially inwardly of said cylinder slots, said jack
  • An electronic needle selecting device for a circular knitting machine having a slotted needle cylinder and a circle of needles disposed in and independently movable lengthwise of said cylinder slots, a circle of jacks disposed in said cylinder slots below said needles and independently movable lengthwise of said slots to raise said needles, said jacks also being rockable in said cylinder slots about individual fulcrums intermediate their ends and having butts above their fulcrums, a jack raise cam to engage said jack butts to raise said jacks and said needles from a first to a second level, ajack aligning cam acting upon said jacks below their fulcrums to rock the jacks so that their said butts are moved radially outwardly of said cylinder slots into the path of said jack raise cam, and selectively pulsed electromagnetic means thereafter acting upon said jacks below their fulcrums to rock selected ones of said jacks so that their butts are moved radially inwardly of said cylinder slots, said jack

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US415761A 1973-05-08 1973-11-14 Electronic needle selecting means for circular knitting machines Expired - Lifetime US3919863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5086473A JPS531865B2 (enrdf_load_stackoverflow) 1973-05-08 1973-05-08

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US3919863A true US3919863A (en) 1975-11-18

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US (1) US3919863A (enrdf_load_stackoverflow)
JP (1) JPS531865B2 (enrdf_load_stackoverflow)
GB (1) GB1409217A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020652A (en) * 1974-12-24 1977-05-03 Wildt Mellor Bromley Limited Selector mechanisms
US4171628A (en) * 1975-05-22 1979-10-23 C. Terrot Soehne Gmbh & Co. Magnetic control system for circular knitting machines
GB2201431A (en) * 1987-02-27 1988-09-01 Precision Fukuhara Works Ltd Needle selection device for circular knitting machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ281720B6 (cs) * 1992-11-16 1996-12-11 Milan Fučík Volící zařízení jehel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025462A (en) * 1933-07-13 1935-12-24 Lombardi Knitting Machine Co I Adjustable element for knitting machines
US2025464A (en) * 1934-04-17 1935-12-24 Lombardi Knitting Machine Co I Knitting machine and adjustable elements therefor
US3262285A (en) * 1962-07-11 1966-07-26 Beguin Rene Electromagnetic needle selection mechanism
US3500662A (en) * 1966-02-16 1970-03-17 Morat Gmbh Franz Pattern controlling selector arrangement
US3512377A (en) * 1967-07-28 1970-05-19 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3620047A (en) * 1969-05-19 1971-11-16 Warner Swasey Co Dial mechanism for knitting machine
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
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025462A (en) * 1933-07-13 1935-12-24 Lombardi Knitting Machine Co I Adjustable element for knitting machines
US2025464A (en) * 1934-04-17 1935-12-24 Lombardi Knitting Machine Co I Knitting machine and adjustable elements therefor
US3262285A (en) * 1962-07-11 1966-07-26 Beguin Rene Electromagnetic needle selection mechanism
US3500662A (en) * 1966-02-16 1970-03-17 Morat Gmbh Franz Pattern controlling selector arrangement
US3512377A (en) * 1967-07-28 1970-05-19 Wildt Mellor Bromley Ltd Patterning mechanism for circular knitting machines
US3620047A (en) * 1969-05-19 1971-11-16 Warner Swasey Co Dial mechanism for knitting machine
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
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020652A (en) * 1974-12-24 1977-05-03 Wildt Mellor Bromley Limited Selector mechanisms
US4171628A (en) * 1975-05-22 1979-10-23 C. Terrot Soehne Gmbh & Co. Magnetic control system for circular knitting machines
GB2201431A (en) * 1987-02-27 1988-09-01 Precision Fukuhara Works Ltd Needle selection device for circular knitting machines
GB2201431B (en) * 1987-02-27 1991-04-24 Precision Fukuhara Works Ltd Circular knitting machines

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Publication number Publication date
JPS49134969A (enrdf_load_stackoverflow) 1974-12-25
GB1409217A (en) 1975-10-08
JPS531865B2 (enrdf_load_stackoverflow) 1978-01-23

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