US2290257A - Stop motion for knitting machines and the like - Google Patents

Stop motion for knitting machines and the like Download PDF

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Publication number
US2290257A
US2290257A US393168A US39316841A US2290257A US 2290257 A US2290257 A US 2290257A US 393168 A US393168 A US 393168A US 39316841 A US39316841 A US 39316841A US 2290257 A US2290257 A US 2290257A
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United States
Prior art keywords
fabric
cell
machine
stop
carriage
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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
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US393168A
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English (en)
Inventor
Stanley William Ewart
Edwards Cyril Houghton
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Celanese Corp
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Celanese Corp
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Filing date
Publication date
Application filed by Celanese Corp filed Critical Celanese Corp
Application granted granted Critical
Publication of US2290257A publication Critical patent/US2290257A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/20—Indicating, warning, or safety devices, e.g. stop motions responsive to defects, e.g. holes, in knitted products
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions

Definitions

  • This invention relates to stop motions for knitting machines and the like, and is particularly concerned with stop or detector motions for warp knitting mac es.
  • a stop or detector motion for a knitting machine or the like comprises a photo-electric cell, means for traversing said cell repeatedly across a fabric being formedon the machine and close to the line at which said fabric is being knitted, means for directing light coniing from said fabric into said cell, and operative means controlled by said cell and adapted to act on undue variation of the amount of light entering said cell by reason of faulty fabric.
  • the photo-electric cell employed for the purpose of the present invention is preferably enclosed by a suitable casing having a narrow slit which faces the fabric and is close to the surface thereof as the cell is traversed across the fabric.
  • the slit which should extend parallel to the length of the fabric being formed, should be of suflicient length to cover the short length of fabric formed in the time between successive passages of the cell, so that every part of-the fabric is covered.
  • a suitable valve amplifier and relay may be employed so that the small variation of current occurring when the resistance of the cell varies on account of a change of light intensity may be sufiiciently intensified to be used for stopping the machine or giving the required signal.
  • the sensitivity of the cell and associated mechanism should, of course, not be so high as to operateas a result of any variations in opacity that may be expected in a satisfactory fabric, and it'may be necessary to make the sensitivity adjustable to deal with fabrics of different types and/or patterns. This may be done by adjusting the width of the slit, and/or" by'suitable resistances in the cell or relay circuit.
  • the light by which the photo-electric cell is actuated may be' supplied from a 'source either on the same side of the fabric as the cell, or on the opposite side, and eitherin the form of a gen- I detail with reference to the accompanying drawof the reflection of thelight from the, fabric bacl into the cell, or alternatively a mirror may be dis posed on the opposite side of the fabric to reflect the light back into the cell.
  • a mirror may be dis posed on the opposite side of the fabric to reflect the light back into the cell.
  • the light entering the cell does not pass through the fabric, but is reflected once by the fabric itself and in the second case the light passes twice through the fabric before entering the cell.
  • a traversing carriage may be employed, provided, in the case of straight bar machines, with a suitable reversing mechanism.
  • the stop mechanism according to the invention forms a convenient unit that may readily be attached to a straight bar machine such as a warp knitting machine.
  • the mechanism usually provided on such machine for stopping the machine may be adapted, by means of suitable electrical and mechanical connections, to stop the machine under the control of the device.
  • the only other modification necessary to the machine is theprovision of one or more rails or bars across the width of the machine on which the traversing carriage rrlay and the provision of the necessary driving mechanism for the carriage.
  • the device is particularly convenient in warp knitting machines in which the threads are fed by two or more guide bars.
  • Figure 2 is a front elevation of one form of mechanism
  • Figure 3 is a diagrammatic side elevation-of a warp knitting machine showing the application of the mechanism shown in Figures 1 and 2;
  • Figures 4 and 5 are a side elevation and a front elevation respectively of a further form of mechanism.
  • Figure 6 shows a detail of the mechanism shown in Figures 4 and 5.
  • FIG. 1 the knitting elements of the machine are shown in Figure 1, i. e., the needles I, the sinkers 2, the presser 3, and the guides 4 of a two-bar warp knitting machine.
  • the guides 4 lead the warp threads 5 to the needles I by which the Warp threads are knitted into the fabric 6 which proceeds to a take-up device 1 and is. wound in a roll 8.
  • the fabric 6 passes over a mirror 9 extending the whole length of the machine and above the fabric 6 parallel to the mirror 9 is a threaded shaft l6 mounted in bearings H in an extension
  • the threaded shaft I0 is driven from the handwhecl shaft l4 of the machine.
  • pulleys I5, I 6 and a belt I! are provided which convey the drive to a bevel gear l8 secured to the pulley I6, and the bevel gear I8 engages with a bevel gear l9 mounted on a shaft 26 carrying a further bevel gear 2
  • One or other of the bevel gears 22 is clutched to the shaft l0 by the provision of clutch cones 24, 25, secured to the gears 22, 23 and a clutch member 26 splined to the shaft l0 and brought into engagement with one or other of the clutch cones 24, 25 by means of a fork 21 mounted on a shaft 28 parallel to the threaded shaft I0.
  • a carriage 29 Resting on the threaded shaft I0 is a carriage 29 which is cut with a thread engaging with the threads of the shaft
  • the carriage 29 engages only with the upper side of the threaded shaft In, which enables the shaft to be supported underneath at several points along its considerable length.
  • two rods 30 Depending from the carriage 29 are two rods 30 to which are secured a lamp 3
  • the carriage 29 is guided and located by means of two upwardly extending lugs 33 engaging with the shaft 26.
  • lugs also serve to engage a stop member 34 secured to the shaft 28 whereby, when the carriage 29' reaches the end of its motion, the shaft 28 is moved longitudinally carrying with it the fork 21. The movement of the fork' 21 disengages the member 26 from one of the clutch cones 24, 25.and
  • Figure 3 is a general view showing how the mechanism is fitted to the frame of a straight bar warp knitting machine.
  • the frame I 2 carrying the shafts l0 and 28 is secured at 35 to the vertical brackets carrying the fabric roll 8 and at 36, 31 to the end frame of the machine. The.
  • photo-electric cell 32 is connected by a suitable cable to an amplifier in the manner described hereafter with reference to Figures 4 and 5, the amplifier being adapted to intensify small variations of current occurring as the resistance of the cell 32 varies, and to employ the amplified current either to stop the machine or to give a warning signal when a fault in the fabric has occurred.
  • FIG. 4 the knitting elements I and 4 are shown as in Figure 1.
  • no focused illumination is employed, the general illumination of the upper surface of the fabric 6 being relied on for the purposes of the invention.
  • mounted on a carriage 42 which slides on two horizontal angle bars 43 extending across the width of the machine.
  • the bars 43 are carried at intervals on rods 44 secured to a cross-member 45 connecting the frames I3 of the machine.
  • the carriage 42 is driven by means of a double chain 46 passing round pulleys 41 at each end of the machine, the pulley 41 shown in Figures 4 and 5 being mounted on a shaft 48 carrying a bevel gear 49.
  • the bevel gear 49 engages with the bevel gear 56 mounted on a shaft 5
  • is driven by means of pulleys 53 and 54 from the hand-wheel shaft M of the machine.
  • the carriage 42 is connected to one run or the other of the double-chain 46 by means of a half sprocket 56 freely mounted on a spindle 51 secured to the top plate 58 of the carriage 42.
  • the sprocket 56 has a projection 59 adapted to engage with one or other of two pins 60, 6
  • the slide 62 is held against the under side of the top plate 58 by means of a guide-member 63, the spindle 51 passing through an elongated hole 64 in the slide 62.
  • a stop pin 66 carried on a bracket 61 mounted on a shaft 68 extending across the machine.
  • the stop pin 66 engages the slide 62 and holds 'it still while the carriage 42 continues its motion. In this way the extension 59 on the half sprocket 66 disengages the pin 69 with which it is engaged and is free to rotate until it engages the other pin 6
  • the half sprocket 56 is thus permitted to rotate one half a revolution whereby its teeth disengage one run of the chain 46 and engage the other. Further rotation of the sprocket 56 is then prevented and the carriage 42 is effectively secured to the other run of the chain 46 whereby it is driven in the opposite direction.
  • the positions of the brackets 61 and stops 66 are adjustable, in accordance with the width of the fabric being knitted.
  • is thus driven backward and forward across the width of the fabric and receives light passing through the fabric.
  • knitting machine comprising a photo-electric cell, means for traversing said cell repeatedly across the fabric being formed on the machine and close to the line at which the saidfabric is being knitted, means for directing light coming from said fabric into said cell, and operative means controlled by said cell and adapted to give a warning indication on undue variation of the amount of light entering said cell by reason of faulty fabric.
  • a stop or detector motion for a knitting machine comprising a photo-electric cell, means for traversing saidcell repeatedly across the fabric being formed on the machine and close to the line at which the said fabric is being knitted, means for directing light coming from said fabric into said cell, and operative means controlled by said cell and adapted to stop the machine on undue variation of, the amount of light entering said cell by reason of faulty fabric.
  • a stop or detector motion for a knitting ma- 1 chine comprising a photo-electric cell, means for traversing said cell repeatedly across the fabric being formed on the machine and close to the line at which the said fabric is being knitted,
  • a stop or detector motion for a knitting machine comprising a photo-electric cell, means for traversing said cell repeatedly across the fabric being formed on the machine and close to .the line at which the said fabric is being knitted, a, mirror on the opposite side of said fabric to said cell, means for directing a focused illumi-. nationthrough said fabric to said mirror in such a way that said illumination is reflected from 'said mirror again through said fabric andinto ric into said cell, said .cell having a narrow slit disposed parallel to the length of said fabric for admitting said light, and operative means controlled by said cell and adapted to give a warning indication on undue variation of the amount of light entering said cell'by reason of faulty fabric.
  • a stop or detector motion for a knitting machine comprising a photo-electric cell, means for traversing said cell repeatedly across the fabric being formed on the machine and close to the line at which the said fabric is being knitted, means for directing light coming from said fabric into said cell, means for adjusting the sensitivity of said cell, and operative means controlled and fro along a straight line across the fabricbeing formed on the machine and close to the line at which the said fabric is being knitted, means for directing light coming from said fabric into said cell, and operative means controlled by said cell and adapted to give a warning indication on undue variation of the amount of light entering said cell by reason of faulty fabric.
  • a stop or detectormotionfor a straight bar knitting machine comprising a photo-electric cell, means for traversing said cell repeatedly to and fro along a straight line across the fabric being formed 'on the'machine and close to the line at which said fabric is being knitted, means for directing a focused illumination through said fabric and into said cell, said cell having a narrow slit disposed parallel to the length of said fabric for admitting said light, and operative means controlled by said cell and adapted to stop the Wvhich said fabric is being knitted, a mirror on the opposite side of said fabric to said cell, means for directing a focused illumination through said fabric to said mirror in such a way that said illumination is reflected from said mirror again through said fabric, and into said cell, said cell having a narrow slit disposed parallel to the length of said fabric for admitting said light, and

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US393168A 1940-06-07 1941-05-13 Stop motion for knitting machines and the like Expired - Lifetime US2290257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB273684X 1940-06-07

Publications (1)

Publication Number Publication Date
US2290257A true US2290257A (en) 1942-07-21

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ID=10258471

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US393168A Expired - Lifetime US2290257A (en) 1940-06-07 1941-05-13 Stop motion for knitting machines and the like

Country Status (6)

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US (1) US2290257A (xx)
BE (1) BE478419A (xx)
CH (1) CH273684A (xx)
DE (1) DE823769C (xx)
FR (1) FR957311A (xx)
GB (1) GB541729A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450996A (en) * 1947-03-27 1948-10-12 Du Pont Automatic stop mechanism for warpers
US2594218A (en) * 1948-02-12 1952-04-22 Mitchell M Rosenstein Stop motion for textile machines
US2611097A (en) * 1946-05-23 1952-09-16 Celanese Corp Photoelectric controlled device for knitting machines
US2694305A (en) * 1951-04-27 1954-11-16 Raymonde Lebocey Circular single or multineedle bed knitting machine
US2711094A (en) * 1949-06-25 1955-06-21 Celanese Corp Stop motion
US2859603A (en) * 1956-06-12 1958-11-11 Photobell Company Stop motion device for fabric producing machines
US2991639A (en) * 1957-11-15 1961-07-11 Meiners Optical Devices Ltd Fault finder
US3055200A (en) * 1960-08-25 1962-09-25 Meiners Carl Otto Fault finders
US3065615A (en) * 1959-06-01 1962-11-27 Abrams Abraham Material examining apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1174936B (de) * 1961-05-05 1964-07-30 Isco Wirkwarenfabrik Gebrueder Abstellvorrichtung an Rundstrickmaschinen fuer doppelflaechige Strickwaren
DE1288229C2 (de) * 1968-06-15 1979-04-12 Memminger Gmbh, 7290 Freudenstadt Fadenliefervorrichtung an rundstrick- oder rundwirkmaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611097A (en) * 1946-05-23 1952-09-16 Celanese Corp Photoelectric controlled device for knitting machines
US2450996A (en) * 1947-03-27 1948-10-12 Du Pont Automatic stop mechanism for warpers
US2594218A (en) * 1948-02-12 1952-04-22 Mitchell M Rosenstein Stop motion for textile machines
US2711094A (en) * 1949-06-25 1955-06-21 Celanese Corp Stop motion
US2694305A (en) * 1951-04-27 1954-11-16 Raymonde Lebocey Circular single or multineedle bed knitting machine
US2859603A (en) * 1956-06-12 1958-11-11 Photobell Company Stop motion device for fabric producing machines
US2991639A (en) * 1957-11-15 1961-07-11 Meiners Optical Devices Ltd Fault finder
US3065615A (en) * 1959-06-01 1962-11-27 Abrams Abraham Material examining apparatus
US3055200A (en) * 1960-08-25 1962-09-25 Meiners Carl Otto Fault finders

Also Published As

Publication number Publication date
DE823769C (de) 1951-12-06
BE478419A (xx)
FR957311A (xx) 1950-02-18
GB541729A (en) 1941-12-09
CH273684A (fr) 1951-02-28

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