US2865056A - Textile drawing mechanism - Google Patents

Textile drawing mechanism Download PDF

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Publication number
US2865056A
US2865056A US630660A US63066056A US2865056A US 2865056 A US2865056 A US 2865056A US 630660 A US630660 A US 630660A US 63066056 A US63066056 A US 63066056A US 2865056 A US2865056 A US 2865056A
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United States
Prior art keywords
arm
lever
catch
stop
operative position
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
US630660A
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English (en)
Inventor
Friedrich Kubler
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.)
SKF GmbH
Original Assignee
SKF Kugellagerfabriken GmbH
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Publication date
Application filed by SKF Kugellagerfabriken GmbH filed Critical SKF Kugellagerfabriken GmbH
Application granted granted Critical
Publication of US2865056A publication Critical patent/US2865056A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01H5/56—Supports for drafting elements
    • D01H5/565—Top roller arms

Definitions

  • This invention relates to drawing mechanisms for textile machinery and, more particularly, is directed to improvements in devices for supporting and weighting the top rolls in such mechanisms.
  • weighted top rolls cooperate with lower rolls which are rotatably supported in an underframe of the mechanism.
  • the top rolls are individually suspended from a pivoted arm which is movable between operative and inoperative positions, and springs act between the pivoted arm and the top rolls suspended therefrom to urge the latter toward the related lower rolls with respect to the pivoted arm in the operative position of the latter. It is apparent that the springs acting between the pivoted arm and the individually suspended top rolls will be eifective to weight the latter, or to press them against the related lower rolls, only so long as the pivoted arm is locked in its operative position against the reactions of the forces of the springs against the top rolls.
  • an operating lever is pivotally mounted on the pivoted arm carrying the top rolls and, in turn, carries a pivoted catch that is engageable with a fixed stop, for example, on the bracket supporting the pivoted arm, the parts being arranged so that engagement of the pivoted catch with the fixed stop prevents swinging of the arm from its operative position in the direction away from the lower rolls and so that manipulation of the operating lever provides a mechanical advantage for disengaging the catch from the stop and then moving the pivoted arm to its inoperative position, or for returning the pivoted arm to its operative position and again engaging the catch with its fixed stop.
  • the pivoting axes of the operating lever and the catch thereon and the fixed stop engageable by the catch are arranged relative to each other, when the catch is holding the pivoted arm in its operative position, so that the reaction of the fixed stop against the catch resulting from the weighting spring forces cannot effect inadvertent disengagement of the catch from the stop.
  • the catch on the operating lever is spring urged to disengage from the fixed stop upon suitable manipulation of the operating lever, while, in another embodiment, the catch is pivoted relative to the operating lever during manipulation of the latter by the action of a pin fixed relative to the pivoted arm and received in a curved slot formed in the catch.
  • the operating lever is adapted to frictionally engage a portion of a fixed part thereby to hold the pivoted arm in the inoperative position thereof.
  • Fig. 1 is a side elevational view of a drawing mechanism for textile machinery which embodies the present invention, and which is shown in its operative condition with an operating lever thereof partly broken away and in section;
  • Fig. 2 is an enlarged, fragmentary sectional view of the drawing mechanism in the operative condition of Fig. 1;
  • Fig. 3 is a sectional view taken along the line 3-3 of Fig. 2;
  • Fig. 4 is a view similar to that of Fig. 2, but with the catch for holding the mechanism in its operative condition being disengaged;
  • Fig. 5 is another view similar to that of Fig. 2, but with the mechanism being retained in its inoperative condition;
  • Fig. 6 is a longitudinal sectional view of a drawing mechanism constructed in accordance with another embodiment of the invention and shown in its operative condition;
  • Fig. 7 is a view corresponding to a portion of Fig. 6, but showing the catch for holding the mechanism in its operative condition after disengagement of the catch from its related fixed stop.
  • the drawing mechanism there illustrated includes a bracket 1t) which has spaced apart side walls and a connecting wall extending along the back, bottom and the lower portion of the front edges of the side walls so that the bracket 10 opens upwardly and forwardly.
  • the side wallsof bracket have registering openings in the lower portions thereof receiving a fixed supporting rod 11, and
  • the lower portion of the bracket is split radially downward from the openings receiving rod 11 so that a bolt. 12 extending through the bracket 10 across the radial:
  • An elongated arm 14 of inverted, U-shaped' crosssection has its back end portion extending into the bracket 1 10 and is pivotally mounted, ata location adjacent'th'e back end of the arm, on a bolt or pivot 15 which extends through the upper front corner portions of the side walls of bracket 10.
  • the arm 14 is intended to support and weight the top saddles at their free ends which receive top rolls 17,
  • helical springs (not shown) are arranged between the guiding arms 16 and the underside of the top of arm 14 in order to urge the top rolls 17 downwardly relative to the latter.
  • the arm 14 is swingable about its pivot 15 between an operative position (Figs.- 1 and 2) and araised inoperative position (Fig. 5 and a fixed underframe 18 carries rotatable lower rolls 19 against which the top rolls 17 are urged or weighted by the above mentioned helical springs when the arm 14 is in its operative position.
  • thedrawing mechanism embodying this invention is provided with an operating lever 20 which extends, through an opening in the top of arm 14 adjacent the back end of the latter and is pivotally mounted withinthe arm 14 onv a pin 21 which is spaced rearwardly from the pivot -15'of the arm 14.
  • the lever
  • lever 20 has a relatively long handle portion at one side of its pivot pin 21, and such handle-portion isjadapted to overlie the top of arm 14 and to bear downwardly, at its front end, on the arm 14, as at 22 in Fig. 1.
  • handle portion of lever 20 has an inverted U-shaped cross-section (Fig. 3), and the arm 14 is provided with recesses 23 in the opposite sides thereof to receivethe flanks of the handle portion of lever 20.
  • a torsion spring 24 encircles the pivot pin 21 and has its opposite ends bearing against the underside of the top of lever 20 and a lateral wall 25 at the back end of arm 14, respectively, to yieldably urge the lever 20 in the direction moving the handle portion of the latter upwardly relative to arm 14, that is, in the clockwise direction relative to arm 14, as viewed in Figs. 1, 2, 4 and 5.
  • the operatinglever 29 has a relatively short extension projecting generally downward from the pivot pin 21"arid carrying a pivot pin 26 on which an auxiliary lever or catch 27 ispivotally mounted.
  • a leaf spring 28 has one-end encircling the pivot pin 21' so as to be supported by the latter, while the otherend:
  • spring 28 bears against a lateral projection 29 on the free end portion of catch 27 and the spring 28 is bent, intermediate its ends, over the pivot pin 26, thereby to urge the catch 27 to rock in the counterclockwise direction, as viewed in Figs. 2, 4 and 5, relative to operating lever 20.
  • a portion-of the back Wall of fixed bracket 10 is bent or struck inwardly, as at 31, to define an upwardly facing bearing surface 30 which forms a fixed stop for the free end of catch 27.
  • the surface 30 is disposed so that, when the free end of catch 27 bears downwardly thereon, as in Fig. 2, the lever 20 willbe held at its. frontend 22, against the top of arm 14 to retain the: latter in its operative position where the toprolls 17 are-z weighted, by their associated springs (not shown) against the lower rolls 19.
  • pivot pins 21 and 26 and the stop 30 are arranged relative to each other so that, with the arm 14 held in its operative position by engagement of catch 27 with stop 30, the axis of pivot pin 26-lies a small distance in back of a line extending through the axis of pivot pin 21 and the point of contact of catch 27 with stop 30.
  • the reaction of stop 30 against the. end of catch 27 tends to turn lever 20 in the counter-clockwise direction and, thereby, merely serves to securely seat the front end 22 of lever20 against the top of arm 14.
  • the spring 28 exerts only a relatively small turning force on the catch 27 merelyto ensure the proper positioning of the end of the latter on the stop 30 during engagement of the catch, as hereinafter described in detail, and the tendency of the spring 24 to turn lever 28 in the clockwise direction, when the parts are in the positions of Fig. 2, is much smaller than the contrary tendency described above and resulting from the reaction between the end of catch 27 and the stop 30.
  • the engagement of catch 27 with stop 30 maintains arm 14in its operative position (Figs. 1 and 2) with the top rolls 17 being spring loaded or weighted against the lower rolls 19, and disengagement of catch 27 from stop 30 is. resisted by the spring loadingor weighting of the top rolls.
  • the spring 24 is effective to continue the clockwiseswinging of lever 20 relative to arm 14 until the lever 20 bears against the back wall 25 of arm 14 at the edge of the opening in the top of the latter through which the lever extendsv (Fig. 4).
  • the weighting or loading springs associated withthe top rollers are relaxed since the arm 14 no longer forms a fixed abutment therefor, and the top rolls rest upon the lower rolls only under the weight of the pivoted arm 14.
  • the lever 20 When it is desired to move the pivoted arm 14 to its raised inoperative position, the lever 20 is manually swungfurther :in the clockwise direction :from theposi- 14 has been moved to its raised inoperative position (Fig. so that the frictional contact between curved portions 34 and 35 will retain the arm 14 in that raised inoperative position.
  • the drawing mechanism in the embodiment of the invention which is there illustrated, includes a bracket 10a clamped by a bolt 12a and nut 13a on a supporting rod 11a, and an arm 14a for supporting the spring loaded or weighted top rolls (not shown), with the arm 14a being pivotally mounted on a bolt 15a carried by bracket 10a.
  • the drawing mechanism of Figs. 6 and 7 further includes an operating lever 36 which has a forked back end portion 38 pivotally mounted on a pivot pin 37 within the arm 14a.
  • a lever or catch 40 is pivotally mounted, at one end, on a pivot pin 39 carried by the forked end 38 of lever 36 and is provided with a longitudinal slot 41 which slidably receives a guide pin 42 fixed within the arm 14a.
  • the free end of catch 40 has a lateral projection 43 thereon adapted to bear against a bolt 44 carried by the bracket 10:: and forming a fixed stop which is disposed above the pivoting axis of the arm 14a defined by the bolt 15a.
  • catch 40 prevents any upward swinging of arm 14a away from its operative position while the reaction of stop 44 against catch 40, as a result of the spring loading or'weighting of the top rolls, tends to turn the lever 36 in the counter-clockwise direction relative to arm 14a and thereby merely presses the front end of lever 36 more strongly against the top of arm 14a so that inadvertent disengagement of catch 4% from stop 44 is thereby avoided.
  • the mechanism of Figs. 6 and 7 further includes a flat or leaf spring. 45 which is secured at one end to the underside of the top of arm 14a, and which extends rearwardly under pivot pin 37 and then over pivot pin 39, thereby to yieldably urge the lever 36 to swing in the clockwise direction, as viewed in Figs. 6 and 7, relative to arm 1411.
  • spring'45 to swing lever 36 in the clockwise Hired tion is not adequate to overcome the contrary force resulting from the fact that the axis of pin 39 is disposed above the line between the axis of pivot pin 37 and the point of contact of catch 40 with stop 44 when the arm 14a is in its operative position.
  • lever 36 When it is desired to move the arm 14a to its raised, inoperative position, the lever 36 is manually pivoted in the clockwise direction, as viewed in Figs. 6 and 7, and, initially, such pivotal movement of lever 36 relative to arm 14a moves the axis of pivot pin 39 downwardly past the line from the axis of pivot pin 37 and the point of contact of catch 40.with stop 44, thereby providing a toggle action which further depresses arm 1412 against the opposition of the loading or weighting springs associated with the top rolls.
  • a drawing mechanism for textile machinery having a fixed support, an arm pivoted on the support and carrying top rolls which are spring loaded against lower rolls in an operative position of the pivoted arm; a device for releasably locking the pivoted arm in its operative position against the reaction to the spring loading of the top rolls and for moving the pivoted arm to and from the operative position thereof, said device comprising a lever pivoted on.
  • said arm and having a portionadapted to bear downwardly against the latter, a catch pivotally mounted on said'lever, a fixed stop engageable by said catch when said portion of the lever bears downwardly upon the pivoted arm with the latter in.
  • mechanism for textile machinery having a fixed support, an arm pivoted on the support and carrying top rolls which are spring loaded against lower rolls, in an operative position of the pivoted arm; a device for releasably locking the pivoted arm in its operative position against the reaction to the spring loading of the top rolls and for moving the pivoted arm to and from the operative position thereof, said device comprising a lever pivoted on said arm and having a portion adapted to bear downwardly against the latter, a catch pivotally mounted on said lever, with the pivoting axis of said catch spaced from the pivoting axis of said lever, and a fixed stop spaced radially from the pivoting axis of said arm and engageable by said catch when said portion of the lever bears downwardly on the pivoted arm with the latter in the operative position to prevent displacement of the pivoted arm away from its operative position, said pivoting axes of the lever and catch and-the point of engagement of said catch with said stop being arranged relative to' each other so that, during initial" swing
  • a device for releasably locking the pivoted arm in its operative position against the reaction-to the spring loading of the top rolls and for moving the pivoted arm to and from the operative position thereof said device comprising a lever pivoted on said arm and having a portion adapted to bear downwardly against the latter, a catch pivotally mounted on said lever, with the pivoting axis of said catch spaced from the pivoting axis of said lever, a fixed stop spaced radially from the pivoting axis of said arm and engageable by said catch when said portion of the lever bears downwardly on the pivoted arm with the latter in the operative position to prevent displacement of the pivoted arm away from its operative position, said pivoting axes of the lever and catch and the point of engagement of said catch with said stop being arranged relative to each other so that, during initial swinging of said lever relative
  • a device as in claim 3 further comprising spring means effective to rock said catch relative to said lever following themovement of, said axis of the catch across said line, and means limiting the rocking of said catch relative to said lever by said spring means.
  • a device as in claim 3 further comprising yieldable means urging. said lever to swing relative to the pivoted arm in said direction, and wherein said axis of the catch is disposed at the side of said line which faces in the oppositev direction when the arm-is in its operative position with said portio-n of the lever bearing downwardly thereon so that the reaction between said catch and stop to the spring loading of the top rolls produces a turning moment on saidvlever in. said opposite direction to overcome said yieldable means urging said lever in the first mentioned direction.
  • a drawing'mechanism for textile machinery having' a fixed support, an arm pivoted on the support and carrying top rolls which are spring loaded against lower rolls in an operative position of the pivoted arm; a device for releasably locking the pivoted arm in its operative position against the reaction to the spring loading of the top rolls and for moving the pivoted arm to and from the operative position thereof, said device comprising a lever pivoted on said arm and having a portion adapted to bear downwardly against the latter, a catch pivotally mounted on said lever, a fixed stop engageable by said catch when said portion of the lever bears downwardly upon the pivoted arm with the latter in the operative position thereof to prevent displacement of the pivoted arm away from said operative position, said catch being disengaged from said fixed stop by swinging of said lever relative to the pivoted arm in the direction moving said portion of the lever away from the pivoted arm, means limiting the swinging of said lever relative to the pivoted arm in said direction so that, after said catch has been disengaged from said fixed stop, continued swing
  • a drawing mechanism for textile machinery comprising a fixed support, lower rolls rotatable about axes which are fixed in relation to said support, an arm pivoted adjacent one end on said support and carrying top rolls at locations between its pivoting axis and the other end of the arm and which are spring loaded in the direction downwardly from the latter, said arm being movable about said pivoting axis between an operative position, where said top rolls are spring loaded against said lower rolls, anda raised inoperative position, a lever pivoted on said arm for swinging relative to the latter about an axis which is parallel to, and spaced from, said pivoting axis of the arm, said lever having a handle portion adapted to bear downwardly on said arm at a location adjacent said other end of the latter when said lever is pivoted in one direction, a catch mounted on said lever for rocking relative to the latter about an axis spaced radially from said pivoting axis of the lever, and a fixed stop on said support at a location spaced radially from said pivoting axis of said arm and
  • a drawing mechanism for textile machinery as in claim 8; wherein said arm and said handle portion of the lever have inverted U-shaped cross-sections and said arm has recesses in the sides thereof receiving the sides of said handle portion when the latter bears downwardly on the arm.
  • a drawing mechanism for textile machinery as in claim 8 wherein said arm has an Opening in the top thereof, and said lever includes a portion extending upwardly through said opening of the arm between said handle portion and said pivoting axis of the lever so that, following the swinging of said lever in said opposite direction relative to said arm for disengaging said catch, said upwardly extending portion of the lever engages the back edge of said opening to cause said arm to swing with said lever to its raised inoperative position in response to continued swinging of said lever in said opposite direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US630660A 1956-01-04 1956-12-26 Textile drawing mechanism Expired - Lifetime US2865056A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES46976A DE1027570B (de) 1956-01-04 1956-01-04 Verriegelungsvorrichtung fuer einen Oberwalzen-Trag- und Belastungsarm an Streckwerken fuer Spinnereimaschinen

Publications (1)

Publication Number Publication Date
US2865056A true US2865056A (en) 1958-12-23

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ID=7486227

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Application Number Title Priority Date Filing Date
US630660A Expired - Lifetime US2865056A (en) 1956-01-04 1956-12-26 Textile drawing mechanism

Country Status (7)

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US (1) US2865056A (de)
BE (1) BE553146A (de)
CH (1) CH347462A (de)
DE (1) DE1027570B (de)
FR (1) FR1168065A (de)
GB (1) GB801071A (de)
NL (1) NL97656C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958103A (en) * 1958-06-12 1960-11-01 Skf Kugellagerfabriken Gmbh Schrotz
US2984873A (en) * 1958-04-11 1961-05-23 Skf Kugellagerfabriken Gmbh Support for top rolls carrying arm of a drafting assembly of a spinning machine
US3006036A (en) * 1957-10-24 1961-10-31 Skf Kugellagerfabriken Gmbh Schrotz
US3007210A (en) * 1958-09-20 1961-11-07 Rieter Joh Jacob & Cie Ag Locking and lifting mechanism for the guide
US3044128A (en) * 1958-10-25 1962-07-17 Skf Kugellagerfabriken Gmbh Gerber

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086600B (de) * 1958-11-22 1960-08-04 Skf Kugellagerfabriken Gmbh Selbsttaetige Verriegelungsvorrichtung fuer einen hochklappbar in einer ortsfesten Stuetze aufgenommenen Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke
DE1152047B (de) * 1960-03-02 1963-07-25 Schurr Stahlecker & Grill Verriegelungsvorrichtung an Trag- und Belastungsarmen fuer die Oberwalzen von Streckwerken
DE1135350B (de) * 1961-02-08 1962-08-23 Skf Kugellagerfabriken Gmbh Verriegelungsvorrichtung fuer einen hochschwenkbar in einer ortsfesten Stuetze gelagerten Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke
DE1179841B (de) * 1961-11-22 1964-10-15 Skf Kugellagerfabriken Gmbh Verriegelungsvorrichtung fuer einen um eine ortsfeste Achse einer Stuetze hochschwenkbar aufgenommenen Oberwalzen-Trag- und Belastungsarm fuer Spinnereimaschinen-Streckwerke
DE1162240B (de) * 1962-02-15 1964-01-30 SKF Kugellagerfabriken Gesellschaft mit beschränkter Haftung, Schweinfurt Verriegelungsvorrichtung für Oberwalzen-Trag-und Belastungsarme von Spinnereimaschinen-Streckwerken.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508964A (en) * 1947-03-19 1950-05-23 Rieter Joh Jacob & Cie Ag Naegeli
US2525647A (en) * 1948-08-18 1950-10-10 Saco Lowell Shops Weighting mechanism for textile drawing machines
US2644988A (en) * 1949-11-16 1953-07-14 Tmm Research Ltd Means for supporting and loading the top rollers of textile drafting apparatus
US2751632A (en) * 1950-09-23 1956-06-26 Skf Kugellagerfabriken Gmbh Textile drawing mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE828493C (de) * 1950-12-23 1952-01-17 Deutscher Spinnereimaschb Ingo Belastungseinrichtung fuer Streckwerke
GB726905A (en) * 1952-01-30 1955-03-23 Casablancas High Draft Co Ltd Improvements in or relating to drafting mechanisms for textile fibres

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508964A (en) * 1947-03-19 1950-05-23 Rieter Joh Jacob & Cie Ag Naegeli
US2525647A (en) * 1948-08-18 1950-10-10 Saco Lowell Shops Weighting mechanism for textile drawing machines
US2644988A (en) * 1949-11-16 1953-07-14 Tmm Research Ltd Means for supporting and loading the top rollers of textile drafting apparatus
US2751632A (en) * 1950-09-23 1956-06-26 Skf Kugellagerfabriken Gmbh Textile drawing mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006036A (en) * 1957-10-24 1961-10-31 Skf Kugellagerfabriken Gmbh Schrotz
US2984873A (en) * 1958-04-11 1961-05-23 Skf Kugellagerfabriken Gmbh Support for top rolls carrying arm of a drafting assembly of a spinning machine
US2958103A (en) * 1958-06-12 1960-11-01 Skf Kugellagerfabriken Gmbh Schrotz
US3007210A (en) * 1958-09-20 1961-11-07 Rieter Joh Jacob & Cie Ag Locking and lifting mechanism for the guide
US3044128A (en) * 1958-10-25 1962-07-17 Skf Kugellagerfabriken Gmbh Gerber

Also Published As

Publication number Publication date
BE553146A (fr) 1960-01-15
NL97656C (nl) 1961-04-17
FR1168065A (fr) 1956-12-04
GB801071A (en) 1958-09-10
DE1027570B (de) 1958-04-03
CH347462A (de) 1960-06-30

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