US2049322A - Method and apparatus for stabilizing the pressure of the drawing rolls of textile machinery - Google Patents

Method and apparatus for stabilizing the pressure of the drawing rolls of textile machinery Download PDF

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Publication number
US2049322A
US2049322A US694181A US69418133A US2049322A US 2049322 A US2049322 A US 2049322A US 694181 A US694181 A US 694181A US 69418133 A US69418133 A US 69418133A US 2049322 A US2049322 A US 2049322A
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United States
Prior art keywords
rolls
pressure
piston
stirrup
roll
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Expired - Lifetime
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US694181A
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English (en)
Inventor
William H Sanders
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Parks Cramer Co
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Parks Cramer Co
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Publication date
Priority to FR779827D priority Critical patent/FR779827A/fr
Priority to GB429240D priority patent/GB429240A/en
Application filed by Parks Cramer Co filed Critical Parks Cramer Co
Priority to US694181A priority patent/US2049322A/en
Application granted granted Critical
Publication of US2049322A publication Critical patent/US2049322A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/46—Loading arrangements
    • D01H5/50—Loading arrangements using springs

Definitions

  • This invention relates to pressure stabilizing mechanism for the feed rolls'or so-called draft 7 rolls of the general type used in textile spinning machinery and preparatory machinery for drawi5 1r ing out and. delivering continuous strands of textile fibres in the form known as roving, sliver,
  • the material travels between the cooperatingsurfaces of one or more pairs of rolls or their equivalent.
  • One roll of each pair is usually fluted and posi tively driven, and the other, usually the upper roll, is covered with a resilient material, such as leather or cork, and is subjected to sufiicient pressure to cause the material to be grasped by the rolls with suflicient firmnessto insure positive and continuous delivery-of the material.
  • each roll in a pair may be uncovered in which case 20 the material usually travels between the surface of one roll, usually the upper of the two, and the surfaceof a continuous apron composed of resilient material, such as leather, which also runs between the two rolls and beneath the material.
  • the 25 apron used in this case' is the "counterpart of a resilient roll covering in that it serve's the same purpose of providing aresilie'nt cushion for'the material which protects it frominjury' by'the pressure to which the upper rolltis subject. 30
  • Such vibration is largely due to the resilient nature'of the'roll covering or the apron, as the case may be, coupled with such other causes 'as the. inertia of the weights or the elasticity of 40 springs used in the pressure applying mechanism and to sympathetic vibration. due to vibrationof the machine as a whole, orto' vibration of the factory floor. i
  • the draft roll mechanism comprises a set of lower fixedly journaled fluted rolls which are positively driven at such different speeds as effect proper drawing of the material and coopcrating upper draft rolls, commonly known as top 5 rolls, covered with a resilient material to cooperate with the fluted surfaces of the respective lower draft rolls.
  • Two or more of the successive top draft rolls are subject to pressure applied through devices known as saddles which are supported upon the top roll journals and cause the rolls to grasp the strand of material passing between them and the lower rolls with sufficient firmness to accomplish properly the process of drafting.
  • the saddles are subjected to pressure by means of a link known as a stirrup which is suspended on an adjustably positioned seat on the saddle and depends therefrom between adjacent pairs of top rolls and lower draft rolls, the lower end of the stirrup being connectedwith mechanism forapplying tension to said stirrup to produce the required pressure.
  • a link known as a stirrup which is suspended on an adjustably positioned seat on the saddle and depends therefrom between adjacent pairs of top rolls and lower draft rolls, the lower end of the stirrup being connectedwith mechanism forapplying tension to said stirrup to produce the required pressure.
  • the mechanism hitherto commonly used for this particular purpose comprises a lever which is seated in the lower eye of the stirrup, the longer arm of the lever being loaded with a weight at the outer end thereof, and the shorter arm of the lever being anchored by an eye-bolt to a girder extending lengthwise of the machine and known as the roller beam which girder carries longitudinally spaced upright supports known as roll stands in which the lower rolls are journaled.
  • Thevalue and uniformity of the pressureimposed upon the top rolls are of major importance for the-saddleandtop rolls are :subject'to change irrvertical position as above' described in response to 1 inequalities in the material passing beneath them and any variation in pressure due to their sudden displacement 'orto their vibratory motion caus'e'suneven drafting which results infrequent --in jury-andbreakage of the "attenuated material beneath eithem th consequent interruption of production, loss by waste, and the necessity for correspondingincreased attention upon the part or theimachine tenders for the piecingi-up ofrthe brokenends.
  • t 1 "Furthermore, uniformity .in' pressure will-in?
  • the resilient covering of 'thetop roll has its counterpart inaleather apron which runs between the fluted *rolls'and thus provides a :resilient cushion: for .the material which passes beneath; the lower s'urface of the upper roll' and' the upperrsurface' of the apronwhi'chruns abovethelower fluted roll; 1 In 'all;- such cases there are-- present the T "same analogous features of a movable roll subject to pressure and to motion, a companion rollrin fixedly positioned bearings, and a continuous surface of resilient material between which and the a surface of the movable feed roll the material is '5 being processedand delivered.
  • vibration and chattering are l 3 the main causes of unevenness in the product and v injury and breakage of the material in'process,
  • My invention is equally'applicable-toall such analogous mechanisms.
  • the distinguishing characteristic of myinvention is the provision of means for applying elastic pressure and dampen- 15 mg 'orrshock absorbing means acting conjointly to maintain the cooperating rolls of a drafting 'mecha'nismofanyof the classes described in non-vibratory operating engagement with the material -passing therebetween.
  • V 1 V V The-primary object, therefore', of theinvention iszx-to provide a textile machine: having draft mechanism including atop draft roll or rolls with means for applying uniformrpressure to the top roll: er -rolls and.
  • combination 1 with hydraulic 50- 7 means for controllably dampening and retarding the longitudinal movement ofrthe stirrup, whereby the top' rolls are'subject only to gradual displacement from theirnormal position without sudden or vibratory motion.
  • Fig. 1 is a fragmentary front elevational view of arollstand whose-upper feed-r0lls are equipped with; pressure mechanism constructed accord-'- an'ceivith the :presentfinvention; j
  • iFigi Q an enlarged :vertical section on line :Fig. 3is an enlarged fragmentary .vertical sec tion on line 33 Fig. 1; a Fig. 4 is a section on line 4-4 Fig. 3 viewed downwardly.
  • a preferred embodiment of the invention is illustrated in the drawings as applied to a cotton spinning machine of a-usual type 'in' which hydraulicallyl controlled spring pressure mechanism has been substituted for the weighted arm mechanism commonly employed in machines of this type.
  • the ma chine frame or bed 5 carries a roller stand 5 which is provided with a plurality: of series of lowerfeed rolls 1 and upper feed rolls 8.
  • a saddle 9 is shown resting upon two of the upper feed rolls of each series or set as is common in the art, but it will be understood that a pairof overlapping saddles may be employed as is also common in the art when it is desired to maintain pressure upon all of the upper feed rolls of each seriesor set.
  • the preferred embodiment of the invention shown'in the accompanying drawings comprises a combined springtension device and a hydraulic dampening or shock absorbing mechanism consisting of a cylinder with a piston re'ciprocable therein adapted to be connected to the movable rolls or the saddles for such rolls, with a spring interposed between the piston and the adjustable upper end ofthe cylinder.
  • Suitable means are provided to permit a" restricted flow of the fluid from one side of the piston to the other thereby to resist the movement of the piston in either direction so that the spring'and dampening device act conjointly to maintain a predetermined substantially uniform pressure upon the movable feed "rolls and to minimize and effectively prevent vibration thereof.
  • this combined device includes a cylinder- Iii rigid with a forwardly and downwardly extending standard I I having a wide flat base I2 resting flatly upon the upper surface of the machine frame or bed 5 and rigidly'secured to the latter by means of a bolt 13 passing through an opening in the machine frame or bed 5 and threaded into an axial bore or socket provided in the lower end of the standard ll, said opening in the machine frame or bed 5 being the one ordinarily provided'to receive the stem of an eye bolt by which the weighted lever of the ordinary pressure mechanism is usually pivotally anchored to the machine frame.
  • the cylinder I8 is supported at an inclination so as to be axially alined with the associated stirrup l4 when inuse, whereby a true straight line 'pull will be exerted upon said saddle link as and by means to'be presently described, thereby placing the upper feed rolls under a uniform even pressure at all times.
  • a piston l5 Loosely and slidably fitted in the cylinder ii! is a piston l5 which works in a body of viscous fluid, such as oil, l6 that is placed within the cylinder Ill.
  • dampening and shock-absorb ing are herein used'to-specifically describe the absorption and final dissipation of kinetic energy by the application of "resistance in opposition to motion.
  • the aforesaid .terms are herein used in specific contra-distinction'to the cushioning action of springs, which, when used in opposition to motion, merely accumulate potential energy by their distortion, which is subsequently delivered as kinetic energy by the recoil of the spring.
  • dampening means employed for the purpose of my invention are strictly non-elastic and serve a novel and entirely different purpose from the elastic means such as springs of various types which are so commonly used in the art for cushioning and which because of their elastic nature are incapable of producing true dampening, as hereinbefore explained.
  • a compression spring 20 by which a downward pull is exerted upon the rod l8 and stirrup l4 in a straight line to subject the upper feed rolls 8 to a uniform pressure which may be varied to suit requirements .by adjustment of head ll longitudinally of cylinder I! so as to vary the normal tension of spring 20 when the device is in use.
  • the use of a spring tension device alone or in angular relation to the stirrup I4 is open to the objection that the same would not provide for a straight line pull upon the saddle link and would not successfully oppose sudden movement thereof due to a sudden jerk or vibration, and the result would be lack of uniform pressure attendant with frequent end breakage and the production of threads which would vary considerably in thickness.
  • non-elastic dampening means cooperating with said pressure-applying means to resist sudden movement of said movable members and dissipate energy expended in overcoming said resistance.
  • a textile machine having means for con-- 'and non-elastic means acting conjointly with said pressure applying means to dampen sudden or vibratory movements thereof, therebytostabilize the pressure effective upon'the material.
  • a textile machine having means for continuously drafting :a moving strand composed of textile fibres comprising cooperating relatively movable drawing 'membersiyieldable means actin'giupon said drawingmembers to apply pressure to the material beingtdrawn therebetween,
  • a textile machine having means for continuously drafting a moving strand composedof textile fibres having cooperating lower and top drawing rolls, yieldable means acting upon said top rolls to apply pressure to the materialbeing drawn between said rolls, and non-elastic dampening means acting conjointly with said pressure applying means to minimize oscillatory move-' ments of said top roll;by:retardation of sudden and vibratorymovements thereof, thereby to stabilize-the'pressure effective upon the material, 5.
  • a textile machine having ;mechanism for continuously drafting -a movingstrand composed of textile fibres comprising aset of fixedly journaled rolls, a set of relatively movable rolls cooperating therewith, a saddle for said movable rolls, yieldable means for :applying pressure-to said saddle, and dampening means operable to. apply non-elastic resistance to any sudden motion of said movable rolls and acting conjointly withvsaidpressure-applying means-to subject said material to substantially uniform pressure by preventing vibratory motion of said movable O rolls.
  • a textilemachine having 'means for continuously drafting a moving strandcomposed of textile fibres having -a set of fixedly journaled 7 lower draftrolls, a'set of cooperating top draft rolls,'a saddle mechanism supported on the jour nals of said top rolls, a. stirrupsuspended from a seat on said saddle, means for applying. tension to said stirrup including a spring acting down 7 j wardly upon said stirrup in axial alinementtheres with, and hydraulic means associated with said pressure applying means and acting 'conjo'intly therewith to dampen suddenor. vibratory movements of said top rolls, thereby to stabilize the pressure effective upon the material.
  • a textile machinehaving means for co tinuously draftingamoving strand composed of textile fibres having a set of fixedly journaled'low er draft -rolls,-a set-0f cooperating top draft rolls, a saddlemechanism supported on thejournals of said top rolls, a stirrup suspended from a seat on said saddle,means for applying tension to said stirrup including la spring' acting downwardly upon said stirrup in axial alinement therewith, 5 and hydraulic dampening means also acting upon said stirrup in axial alinement therewith and 'tud e -o'f movement of said top'rolls and to prevent sudden and vibratory movements thereof, there:
  • stirrup connected with said saddle and extend- 65 ing between said feed-rollstoward said roll stand bed, a hydraulic dampening device, means mounting the same upon said roll stand bed in an inclined position longitudinally alined with said stirrup, said dampening device having a piston provided with an axial upwardly “projecting rod connected to said stirrup, and a “spring exerting adownward pullupon saidstirrup.
  • a textile machine of the character described having drafting roll mechanism comprising a set of lower draft rolls, a set of top draft rolls resting thereupon in operative engagement, a saddle bearing upon the journals of said top rolls, a stirrup positioned at its upper end in an adjustable seat on said saddle, a fixture positioned below said rolls comprising a hollow cylinder disposed beneath said saddle in axial alinement with said stirrup seat, a piston movable lengthwise within said cylinder having a piston rod connected with said stirrup in axial alinement therewith, an apertured head adjustably positioned in said cylinder and surrounding said rod, a spiral spring disposed in compression between said head and said piston, and a body of viscous liquid filling the lower portion of said cylinder to above said piston acting conjointly with said spring to maintain uniform elastic pressure upon said saddle and top rolls
  • a device for applying elastic pressure to the top rolls of the drafting mechanism of a textile machine and to dampen the vibratory movement thereof comprising a cylinder closed at its lower end and having an apertured head at the opposite end, a piston movable lengthwise within said cylinder having a piston rod extending through said aperture and provided at the outer end thereof with means for operative connection to the top rolls of said machine, means for securing said cylinder to the frame of the machine, a spiral. spring disposed within said cylinder for compression between said piston and said head, and a body of liquid filling the lower portion of said cylinder to above said piston.
  • a device for applying yielding pressure through a saddle and stirrup to the top rolls of the drafting mechanism of a textile machine comprising relatively movable members adapted to be attached respec tively to'a rigid part of the machine and to the top roll stirrup, a spring of predetermined strength intermediate of said relatively movable members, and supplemental dampening means operable to apply non-elastic resistance to the relative movement of said movable members in response to displacement of said top rolls and acting conjointly with said spring to maintain substantially uniform pressure on said top rolls by preventing vibration thereof.
  • a device for applying yielding pressure through a saddle and stirrup to the top rolls of the drafting mech anism of a textile machine comprising relatively movable members one of which is adapted to be anchored to a stationary part of the machine and the other of which is adapted to be detachably connected to the top roll stirrup, a spring of predetermined strength intermediate of said relatively movable members, means for varying the initial force applied by said spring to said stirrup, and supplemental dampening means operable to apply non-elastic resistance to the relative movements of said members and cooperating with said spring to stabilize the pressure applied to said top rolls and prevent vibratory motion thereof.
  • a device for applying yielding pressure through a saddle and stirrup to the top rolls of the drafting mechanism of a textile machine comprising a cylinder closed at its lower end and having means for attachment to the frame of the machine, an apertured head closing the other end of said cylinder, a piston reciprocable in said cylinder operable to resist the passage of surrounding liquid upon reciprocation of the piston and having a piston rod extending through said head and provided with means detachably to engage the top roll stirrup, a compression spring of predetermined strength interposed between said piston and said head, and a body of liquid filling said cylinder to above said piston and acting upon reciprocation of the piston to restrict the amplitude of movement of the top rolls, thereby to prevent vibration thereof.
  • a device for applying yielding pressure through a saddle and stirrup to the top rolls of the drafting mechanism of a textile machine comprising a cylinder closed at its lower end and having means for attachment to the frame of the machine, an apertured head adjustably mounted upon the other end of said cylinder, a piston reciprocable in said cylinder operable to restrict the passage of surrounding liquid upon reciprocation of the piston and having a piston rod extending through said head provided with means detachably to engage the top roll stirrup, a compression spring of predetermined strength interposed between said piston and said head, and a body of liquid filling said cylinder to above said piston acting upon reciprocation of the piston to restrict the amplitude of vibration of the top rolls thereby to dampen the vibration thereof, and means whereby the position of said cylinder head may be adjusted to determine the value of the force exerted by said spring upon said stirrup.
  • a device for applying pressure through a saddle and stirrup to the top rolls of the drafting mechanism of a tex- V tile machine comprising aicylinder' closedi at; it's lower end and having? means for attachment to the frame of the machine,.a,n.apertureds'headsclosing theother end of said cylinder, a pisto'nz recip rocable in said cylinder having fa'predetermined' clearance relative to thecyli nder bore and? having a piston rod extending through said head pro vided with means detachably to engage thefftop roll stirrup', a compression spring ofpredetermi'n'ed strength interposed between.
  • action oi isaidc fluid;v upon the movementsofsaidipistoru fl SANDERS.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US694181A 1933-10-18 1933-10-18 Method and apparatus for stabilizing the pressure of the drawing rolls of textile machinery Expired - Lifetime US2049322A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR779827D FR779827A (enrdf_load_stackoverflow) 1933-10-18
GB429240D GB429240A (enrdf_load_stackoverflow) 1933-10-18
US694181A US2049322A (en) 1933-10-18 1933-10-18 Method and apparatus for stabilizing the pressure of the drawing rolls of textile machinery

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US694181A US2049322A (en) 1933-10-18 1933-10-18 Method and apparatus for stabilizing the pressure of the drawing rolls of textile machinery

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US2049322A true US2049322A (en) 1936-07-28

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US (1) US2049322A (enrdf_load_stackoverflow)
FR (1) FR779827A (enrdf_load_stackoverflow)
GB (1) GB429240A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3020854A1 (en) * 2014-11-13 2016-05-18 Murata Machinery, Ltd. Drafting device and spinning unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047085B (de) * 1955-06-29 1958-12-18 Spinnerei Karl Marx Veb Spinnmaschinenstreckwerk mit als federbelastete Doppelhebel ausgebildeten Oberwalzen-Fuehrungsarmen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3020854A1 (en) * 2014-11-13 2016-05-18 Murata Machinery, Ltd. Drafting device and spinning unit
CN105603590A (zh) * 2014-11-13 2016-05-25 村田机械株式会社 牵伸装置以及纺织单元
CN105603590B (zh) * 2014-11-13 2019-09-20 村田机械株式会社 牵伸装置以及纺织单元
CN110387606A (zh) * 2014-11-13 2019-10-29 村田机械株式会社 牵伸装置以及纺织单元
CN110387606B (zh) * 2014-11-13 2021-10-26 村田机械株式会社 牵伸装置以及纺织单元

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GB429240A (enrdf_load_stackoverflow)
FR779827A (enrdf_load_stackoverflow) 1900-01-01

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