US2332973A - Drawing mechanism for spinning frames and the like - Google Patents

Drawing mechanism for spinning frames and the like Download PDF

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Publication number
US2332973A
US2332973A US401485A US40148541A US2332973A US 2332973 A US2332973 A US 2332973A US 401485 A US401485 A US 401485A US 40148541 A US40148541 A US 40148541A US 2332973 A US2332973 A US 2332973A
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rollers
tensor
slots
pair
bands
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US401485A
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English (en)
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Louie Ban Lem
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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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • This invention relates to apparatus for drafting cotton slivers or rovings for the production of spun yarn, the apparatus being of the typ wherein a sliver or roving is drafted between a pair of endless bandsarranged around the middle pair of rollers of the spinning frame, pressure being applied to the drawing rollers by means of a saddle mechanism which is connected to a spring operated lever mechanism mounted upon a fixed part of the apparatus and so arranged that by raising the saddle mechanism, the pressure action of the spring is removed from the drawing rollers and exerted in a direction such as to retain the saddle mechanism in its raised position, the loading being restored to said rollers when the pressure saddle is lowered again.
  • the invention consists in an apparatus for drafting cotton slivers or rovings for the production of spun yarns of the type above referred to, in which the upper and lower endless bands arranged around the middle pair of drawing rollers are provided at their forward ends, at a point between the middle and front pairs of rollers, with a pair of tensors which are slidably mounted within recesses formed in the cap bars, the upper tensor being resiliently mounted so as to be capable of movement towards and away from the lower tensor within the said slots, thereby to apply a yielding pressure to the slivers or rovings.
  • the invention also consists in the further features hereinafter described and claimed.
  • Figure 2 a front elevation
  • Figure 4 a side elevation of the saddle mechanism
  • Figure 5 a side elevation of the middle rollers and their associated endless bands
  • Figure 6 a front elevation
  • Figure '7 a plan and Figure 8 an end elevation of the upper tensor
  • Figure 9 an end elevation and Figure 10 a side elevation of a modified form -of upper tensor
  • Figure 17 is a front elevation of an improved lower tensor shown in combination with an upper tensor
  • Figure 18 is a plan view
  • Figure 19 is a side view
  • Figure 19A is a vertical section taken on th line l9l9 of Figure 17 and showing the relative position of other adjacent parts, i. e., the endless bands and the middle pair of drawing rollers,
  • Figure 20 is a side elevation of the drawing head fitted with a modified saddle mechanism and loading means
  • Figure 21 is a side elevation of the improved saddle and its yoke or ball, detached from the drawing head.
  • l is a stationary support on which are mounted three pairs of drawing rollers, namely, front rollers 2 and 5, middle rollers 3 and 6, and back rollers 4 and I.
  • the lower rollers 2, 3 and 4 of each pair are rotatably mounted in the support I, whilst the upper rollers 5, 6 and I which rest upon said lower rollers are held in their correct positions bycap bars each of which comprises three blocks 81:, 8a and 8a.
  • the rear block 8.1: is secured to an arm 8b pivoted at 9 to the rearward portion of the support I, whilst the middle and front blocks 8a are mounted upon a rod 80 which is slldably adjustable relative to the arm 81) and upon which the middle block 8a may also be slldably adjustable.
  • each cap bar as constituted by the three blocks 82:, 8a and 8a can be swung upwardly out of its operative position.
  • the blocks 81:, 8a and 8a are provided with vertically disposed slots l0 extending the whole depth of the blocks and within which are slibably engaged the reduced ends ll of the upper rollers of each pair, said slots serving to position the rollers while permitting them to roll freely.
  • the lower rollers are preferably fluted or grooved in well known manner.
  • the front blocks 8a of the cap bars at a point between the front and middle pairs of rollers,
  • slots or recesses l2 instead of extending the whole depth of the front blocks 8a as is the case with the slots l0, stop short a little distance from the underside of said blocks so as to be closed at their lower ends. Further, the recesses l2 instead of being arranged parallel to the slots It may be disposed at a slight angle to the vertical for a purpose to be referred to later.
  • the drawing mechanism as so far described is similar to that described in my prior atent specification No. 2,209,573. 7 V
  • the slots I 2 engage with the ends of a pair of upper and lower tensors l3 and 14 which extend between the cap bars parallel to the rollers.
  • the lower tensor l4 shown in detail in Figures 14 and 15 comprises a pair of U-shaped bracket portions i5 arranged at equal distances on each side of the centre of the tensor, and within which are rotatably mounted rollers I8.
  • the said rollers are adapted to be inserted from the top of the tensor, one of the reduced ends of each roller engaging within a hole ll formed in one of the vertical limbs of each bracket, whilst the other end drops into a slot lla formed in the other verticallimb of each bracket and open at its upper end.
  • each of the slots 22 Secured to that side of the tensor l3 remote from the front pair of rollers 2, 5 and adjacent the .two ends of each of the slots 22 are four prongs or guide pieces 24 which extend outwardly from said bar and downwardly for some distance below the same,'the said prongs being disposed along the length of the tensor in two pairs, one pair to each slot.
  • the upper tensor [3 as above described is substantially the same as that described in my earlier patent specification No. 2,209,573.
  • the underside of the upper tensor I3 is flat, and when placed in position with its reduced ends in the slots l2 of the cap bars, normally rests upon the end portions IQ of the lower tensor l4, gaps being left between the lower surface of the upper tensor l3 and the top surface of the rollers l8 of the lower tensor l4 by reason of the position of the said rollers as already stated.
  • a pair of endless bands 25 Arranged around the upper middle roller 31 is a pair of endless bands 25, the upper stretches of which extend forwards and downwards through the slots 22 and round the front edges 23 of the upper tensor l3 which may be suitably rounded off, and thence back through the gaps between the rollers l6 and the upper tensor l3, and then between the two pairs of prongs 24 to the roller 6 again.
  • a second pair of endless bands 28 are similar] arranged, around the lower middle roller 3 the said bands in this case passing upwardly andforwardly from the roller 3, between the pairs of prongs 24 of the upper tensor l3 and between the vertical limbs of the bracket portions l5 of the lower tensor I4 whence they pass round the rollers l6 and back through the gaps formed between" is driven in any well known manner by suitable mechanism not shown, the upper bands being also revolved due to their frictional contact-with the lower bands.
  • a saddle mechanism which comprises a rear part 21 which bears upon the rollers 8 and I and a front part 28 which bears upon the roller 5.
  • These two parts of the saddle members are connected to one another by means of a rod 29 secured to the part 28 and which extends through an opening in the part 21.
  • the front part 28 of the saddle is provided with a handle portion 38, and has also pivotally connected thereto the upper end of a connecting rod 3
  • the pressure mechanism comprises a pair of side plates 32 slightly spaced apart and connected together by a base plate 33 to form a frame which is secured upon a fixed bar 34.
  • the frame at one end forms an arm having an inwardly projecting portion 35 which serves as a support and a pivot for one of a pair of caps 36 which telescopically engage one another to form a cylinder within which is located a compression spring 31 which tends to force the two caps apart and acts in substitution for the usual weight for the purpose of loading the drawing mechanism.
  • a lever 38 which is mounted upon a pin 39 secured to the upper end of a second arm formed at the other end of said frame.
  • This lever at its rearend serves as a second support or pivot 48 for the cylinder 36 and also as a fulcrum for the lever 38 upon the said cylinder, whilst at its front end the said lever is formed with a hook 4
  • the lever 38 is also provided with an arcurate slot 42 arranged concentrically with the pivot 38 of said lever, and within which engages a pin 43 secured to the supporting frame whereby a limited rocking movement is permitted to the lever 38.
  • a spring 44 Secured at its upper end to the underside of the front part 28 of the saddle. at a po nt opposite the pin 2
  • a spring 44 which flats over the said pin so as to rest at its lower end upon the top of said upper tensor.
  • the recesses l2 in which the top and bottom tensors are slidably mounted may be given a slight inclination from their upper to their lower ends in a direction away from the plane passing through the axes of the middle rollers, so that a tensioning of the upper and lower pairs of endless bands takes place as the said tensors are pressed downwardly in their recesses under the pressure of the spring saddle mechanism. Should greater tensioning be required than that aliorded by the inclination of the slots, then the middle blocks 8a of the cap bars may be adjusted along their associated rods 80 by means of set screws 8d until the required tensioning is obtained.
  • both sets are arranged vertically one behind the other each prong Mb in the front row being connected to a corresponding prong 48 in the back row so as. to form a series oi inverted U-shaped brackets which are adapted to fit over the lower middle drawing roller.
  • Each bracket is provided at its upper end with a horizontal projecting arm 48 which is slotted at 50 and engages a pin 5i projecting from each of the vertical limbs of the bracket portions 22b which form the guides for the bands and are suitably slotted at 52 to permit sliding movement of the arms 48.
  • the prongs 24b and 48 are permitted to'move backwards and forwards in unison with any similar movement imparted to the lower middle roller or to the blocks 8a to maintain the required tension of the bands 25 and 26.
  • the upper tensor in ca ch modification has been fitted with prongs such as 24, 24a, 24b in order to guide the endless belts 25, 26, but no prongs were fitted to the lower tensor, but a' modification will now be described in which the reverse arrangement, i. e., prongs are fitted to the lower tensor and this is used with an upper tensor such as that shown in Figure 9 of my prior patent specification No. 2,209,573 in which no prongs are used.
  • the lower tensor comprises a vertical frame 53 stamped or otherwise formed from a flat top bar 54, so as to constitute a pair of somewhat deep U-shaped sockets 55 depending from the bar 54 and spaced apart at a distance corresponding to sockets 58 of more even and stronger yarn. Also by the resilient mounting of the upper tensor l3 such adjustment of the upper pair of bands is possible without interfering with the normal pressure of the saddle mechanism upon the drawing rollers.
  • bracket portions also serve as additional guides for the stretches of the upper and lower bands.
  • a forked ex tension 58 comprising a pair of prongs 59 which are somewhat obliquely arranged to the plane containing the sockets, the prongs being adapted to engage with, and fit partly around, the reduced neck portion of the lower roller 3 of the middle pair of drawing rollers 3 and 6, and project radially for a sufficient distance to form side guides for the endless bands 25 and 2B, and keep them in position, as shown in Figure 19A.
  • each U-shaped socket 55 is adapted to be closed or bridged by a short closer bar 50 formed with spigot ends iii to engage with slots 62 formed partly in the fiat top bar 54, and partly in the upper part of each side limb of each U-shaped socket 55.
  • These slots are of such a depth that when the closer bars are in position such closer plates will lie somewhat below the level of the top bar of the lower tensor.
  • Such closer bars 60 each essentially constitute the lower tensor, and as seen in the sectional view in Figure 19A the lower endless band 26 of each pair of endless bands is passed round the forward edge, and for which purpose the edge is rounded to afford easy movement to the band. Its back edge may be similarly rounded so as to make the tensor interchangeable.
  • the upper tensor 51 comprises a bar in which a pair of sockets 56 are formed.
  • the edge at the bottom of each socket is rounded as shown at 63 in Figure 19A and around the forward side of which the upper endless belt 25 passes, sufllcient space being left between the partlloftheuppertensorandthepartllof the lower tensor to receive the sliver or roving which is to be treated
  • the upper tensor is under the influence of a spring M which eng ges with a -pin ll.
  • FIG. 20 and 21 a modified form of drawing head is shown in which the upper roller of the middle pair, and the upper roller 8 of the front pair, are kept pressed down upon their respective lower rollers I and I by means of a saddle piece 64 having two pressure feet or pads a, b which bear respectively on the upper rollers 6 and 5.
  • the centre part of the saddle rides upon one end of a spring 44 the other end of which fits around a pin II on the upper tensor 81, as shown in Figures 17, 19 and 19A.
  • the saddle piece 64 is centrally pivoted at 6!
  • An apparatus for drafting cotton slivers or rovings for the production of spun yarns comprising front, middle and back pairs of upper and lower drawing rollers, a support for the lower rollers, cap bars engaged by the upper rollers and having slots therein, upper and lower endless bands engaging the upper and lower middle rollers, a saddle mechanism for applying pressure to said rollers, a roller tensor mounted in said slots and engaged by the lower band, a spring pressed upper tensor engaged by the upper band,
  • the lower tensor including a U-shaped bracket portion having vertical limbs, one of the limbs having a hole and the other limb having a recess open at its upper end, and a roller mounted at one end in said hole and engaged at its other end in said rece the upper surface of said roller being disposed slightly below the top surface of the lower tensor.
  • An apparatus for drafting cotton slivers or rovings for the production of spun yarns comprising front, middle and back pairs of upper and lower drawing rollers, a support for the lower rollers, cap bars engaged by the upper rollers and having slots therein, upper and lower endless bands engaging the upper and lower middle rollers.
  • each prong in the front row being con-- nected to a corresponding prong in the back row to form a series of inverted U-shaped brackets fitting over the lower middle roller.
  • An apparatus for drafting cotton slivers or rovings for the production of spun yarns comprising front, middle and back pairs of upper and lower drawing rollers, a support for the lower rollers, cap bars engaged by the upper rollers and having slots therein, upper and lower endless bands engaging the upper and lower middle rollers, a saddle mechanism for applying pressure to said rollers, a lower tensor mounted in said slots and engaged by the lower band, a spring pressed upper tensor engaged by the upper band, two rows of vertically disposed prongs provided on the upper tensor arranged one behind the other, each prong in the front row being connected to a corresponding prong in the back row to form a series of inverted U-shaped brackets fitting over the lower middle roller, the brackets being adjustably mounted upon the upper tensor.
  • An apparatus for drafting cotton slivers or rovings for the production of spun yarns comprising front, middle and back pairs of upper and lower drawing rollers, a support for the lower rollers, cap bars engaged by the upper rollers and having slots therein, upper and lower endless bands engaging the upper and lower middle rollers, a saddle mechanism for applying pressure to said rollers, a lower-tensor mounted in said slots and engaged by the lower band, a spring pressed upper tensor engaged by the upper band, prongs provided on the lower tensor engaging the lower roller of the middle pair and forming side guides for the endless bands, said lower tensor being used in connection with an upepr tenso 'not provided with prongs.
  • An apparatus for drafting cotton slivers or rovings for the production of spun yarns comprising front, middle and back pairs of upper and lower drawing rollers, a support for the lower rollers, cap bars engaged by the upper rollers and having slots therein, upper and lower endless coacting with the upper roller of the middle pair for tensioning the upper endless band.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US401485A 1940-07-01 1941-07-08 Drawing mechanism for spinning frames and the like Expired - Lifetime US2332973A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645822A (en) * 1946-12-10 1953-07-21 Uxbridge Worsted Company Inc Drafting textile fibers
US2675585A (en) * 1947-03-31 1954-04-20 Rieter Joh Jacob & Cie Ag Drawing apparatus for textile fiber preparation
DE929471C (de) * 1950-12-23 1955-06-27 Deutscher Spinnereimaschb Ingo Doppelriemchen-Streckwerk fuer Spinnereimaschinen
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus
US2789319A (en) * 1952-12-23 1957-04-23 Johns Manville Fiber opener and cleaner
US2947038A (en) * 1953-11-12 1960-08-02 Josef Pfenningsberg & Co Drawing devices operating with an upper belt
DE974060C (de) * 1952-11-08 1960-09-08 Weller Maschf Heinz Oberriemchen-Streckwerk
US2964805A (en) * 1956-10-04 1960-12-20 Stahlecker
US3041677A (en) * 1960-05-31 1962-07-03 Machinecraft Inc Top roll weighting devices
CN111270360A (zh) * 2018-12-04 2020-06-12 株式会社丰田自动织机 纺纱机的纤维束集束装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949995C (de) * 1954-02-23 1956-09-27 Zinser Textilmaschinen Gmbh Doppelriemchen-Streckwerk fuer Spinnmaschinen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645822A (en) * 1946-12-10 1953-07-21 Uxbridge Worsted Company Inc Drafting textile fibers
US2675585A (en) * 1947-03-31 1954-04-20 Rieter Joh Jacob & Cie Ag Drawing apparatus for textile fiber preparation
DE929471C (de) * 1950-12-23 1955-06-27 Deutscher Spinnereimaschb Ingo Doppelriemchen-Streckwerk fuer Spinnereimaschinen
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus
DE974060C (de) * 1952-11-08 1960-09-08 Weller Maschf Heinz Oberriemchen-Streckwerk
US2789319A (en) * 1952-12-23 1957-04-23 Johns Manville Fiber opener and cleaner
US2947038A (en) * 1953-11-12 1960-08-02 Josef Pfenningsberg & Co Drawing devices operating with an upper belt
US2964805A (en) * 1956-10-04 1960-12-20 Stahlecker
US3041677A (en) * 1960-05-31 1962-07-03 Machinecraft Inc Top roll weighting devices
CN111270360A (zh) * 2018-12-04 2020-06-12 株式会社丰田自动织机 纺纱机的纤维束集束装置
CN111270360B (zh) * 2018-12-04 2022-05-17 株式会社丰田自动织机 纺纱机的纤维束集束装置

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GB542997A (en, 2012) 1900-01-01

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