US3079646A - Magnetic drafting mechanism - Google Patents

Magnetic drafting mechanism Download PDF

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Publication number
US3079646A
US3079646A US828247A US82824759A US3079646A US 3079646 A US3079646 A US 3079646A US 828247 A US828247 A US 828247A US 82824759 A US82824759 A US 82824759A US 3079646 A US3079646 A US 3079646A
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US
United States
Prior art keywords
roll
apron
rolls
magnetic
series
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
US828247A
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English (en)
Inventor
Virgil A Burnham
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.)
Saco Lowell Shops
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Saco Lowell Shops
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saco Lowell Shops filed Critical Saco Lowell Shops
Priority to US828247A priority Critical patent/US3079646A/en
Priority to GB24443/60A priority patent/GB964781A/en
Priority to ES0259744A priority patent/ES259744A1/es
Priority to CH271464A priority patent/CH404486A/de
Priority to CH824460A priority patent/CH384431A/de
Application granted granted Critical
Publication of US3079646A publication Critical patent/US3079646A/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
    • D01H5/54—Loading arrangements using magnetic arrangements
    • 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
    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H2700/00—Spinning or twisting machines; Drafting devices
    • D01H2700/245—Conception or fabrication of drafting cylinders

Definitions

  • This invention relates to drafting devices of the type used in textile machines, such as spinning and roving frames and the like, wherein pressure must be applied by the drafting devices to the fibrous materials passing through them. More particularly, it relates to mechanisms which incorporate permanent magnetic rolls for applying the requisite pressure.
  • Textile drafting mechanisms incorporate spaced apart devices which grip a strand of fibrous material with sufficient firmness to perform the drafting function as the devices operate at increasingly higher speeds.
  • a gripping action by pairs of rolls comprising such devices has usually been achieved by weighting the top roll in each pair, forcing it down upon the bottom roll.
  • Cumbersome weighting equipment comprising weights or springs and associated mechanisms have heretofore been required for this, although it has long been appreciated that the top and bottom rolls or other drafting devices could be forced together by the use of magnetic elements, thereby dispensing with the cumbersome conventional weighting equipment and improving the cleanliness of the operation of the machine.
  • a cylindrical permanent magnet is inserted in the central portion of a nonmagnetic tube and solid ferromagnetic pole pieces are inserted in the tube at each end.
  • Each top roll is placed in horizontal running position resting against a bottom roll and a flux path is thus created via the ferromagnetic pole pieces associated with the top roll, between the pole pieces and the bottom roll, and through the bottom roll.
  • Each bottom roll is adapted to be rotated in fixed bearings and the top roll is rotated through frictional drive by the bottom roll.
  • the bottom roll may also include permanent magnetic materials therein and may act either in conjunction with a permanent magnetic top roll or not, depending upon the weighting and degree of driving force required, since the upper roll of the pair is frictionally driven by the lower roll.
  • This is especially important with drafting elements of the type having both upper and lower aprons with which this invention is especially concerned, since it for the first time makes possible the driving of an upper apron drafting element by a lower apron driving ele- Patented Mar. 5, 1953 ment Without the employment of apron-damaging knurled or fluted roll portions, although these may be employed for special reasons on either upper or lower rolls if desired.
  • the present invention relates to these problems and its principal object is to provide an improved magnetically weighted drafting element particularly one of the double apron type capable of utilization by relatively un-' skilled personnel.
  • a feature of the invention is the ability to adequately drive double apron drafting elements frictionally from the bottom roll without the use of knurled or fluted apron contacting roll portions, thus enhancing apron life to a surprising degree.
  • Another feature of the invention is the provision of a series of drafting devices adapted to successively work on a sliver passing therethrough, with magnetic top and bottom rolls mounted in a predetermined magnetic relationship so that the top rolls are removable without problems and are easily put back tionship during maintenance.
  • a further feature is the use of a lower apron bar in conjunction with an apron device, as a prime reference for mounting a top magnetized roll.
  • FIG. 1 is a vertical section of a preferred embodiment of the invention taken through a series of drafting devices on a plane generally parallel with the line of travel of a sliver through the series;
  • FIG. 2 is a partial vertical section illustrating the top front roll support mounted on the lower apron bar and top back roll support mounted on the trumpet bar;
  • FIG. 3 is a partial vertical section illustrating the middle fiber control device and especially its upper apron roll cage side members mounted on the lower apron bar;
  • FIG. 4 is a view in partial section of the upper apron roll taken on line 4-4 of FIG. 3, showing the particular construction of that roll in conjunction with its cooperating bottom roll;
  • FIG. 5 is a top projection of the embodiment on line 5-5 of FIG. 1, parallel with the planes of the rolls, and
  • FIG. 6 is a front sectional elevation taken on the lines 6-6 of FIG. 5 but showing a modification wherein permanent magnets are incorporated in the bottom roll.
  • a frame 30 there is mounted front and. back. roll devices. 32 and 34 respectively and a middle fiber control device36, forming a drafting series for drafting a textile sliver.
  • the bottom drafting rolls 38 and 40 of the roll devices may be ferromagnetic bil lets, preferably steel, or may include permanent magnets. In either event they extend the. length of the frame and serve as bottom rolls in a number of like side-by-side drafting series. These rolls are rotatably mounted in bearings fixed in the frame. and driven by means not shown.
  • Each support member comprises av 5.0and 52v aremagnetized, each containing a cylindrical.
  • the middle fiber control device 36 comprises a bottom. and a top apron assembly.
  • bottom apron assembly comprises an endless apron 44.
  • a bottom apron roll 42 withinwhich is.v mounted a bottom apron roll 42, either with or. without permanent magnets, but having a smooth apron driving portion 43, a bottom apron bar 46 and an apron tension roll 48.
  • Both the bottom apron roll and the apron bar extend the. length of the frame, serving identical function in side-by-side apron devices in the frame.
  • the bottom apron roll is mounted for rotation and provided with driving means not shown.
  • The, top apron assembly comprises a short endless apron" 62,. and within, the loop thereof, a top apron roll 69 and a tensor element 64.
  • the top apron and bottom apron are in face-to-face running contact. These aprons must be. urged, together with considerable force and accordingly the top apron roll, is. magnetized, having a particular construction (hereafter described), and related
  • An integral rearward extension 565 is d. to the bottom roll so that no spurious magnetic paths exist but rather all magnetic force available is utilized to urge the aprons together.
  • the top roll is supported relative to the bottom roll by two non-magnetic cradle side members 58 spaced apart and held together by the tensor 64 by means of tensor extension 64a, b which fit directly into apertures in the non-magnetic side members forming a cradle.
  • the cradle side mem ers 52 are solid castings of frictionless, rigid plastic which do not create unwanted flux paths.
  • These cradle side members each have a gudgeon receiving half bearing surface 58a.
  • the gudgeons 61 of the top apron roll 60 are placed in these, and the rolls are held in this position by cooperation with the top apron and tensor. This top apron assembly is supported upon the bottom apron bar 46.
  • a bottom restraining projection 58b extends integrally from the rearward edge of the each cradle side member 58, adapted to engage a matching slot in the apron bar, restraining forward movement of the top apron assembly during movement of the aprons.
  • the top apron 62 is positioned with respect to the bottom apron by the cooperation of these projections with their matching slots in the apron bar, and also by adjustment screws63 extending between a forward portion of the apron bar and each cradle side member, which screws permit adjustment of the spacing between the tensor and the apron bar.
  • the double apron device utilized in this invention depends for its operation upon the particular construction. of the top apron roll' and its relation to the bottom. apron roll, which promote high magnetic attracting forces because of the desirable flux paths of the structure.
  • the topapron roll includes a cylindrical permanent magnet 14 and novel pole assemblies 15 at each end comprised of ferromagnetic hollow bosses 18 and inserts therein.
  • the bosses 18 are fitted over the ends. of the magnet, and are preferably joined to a non-magnetic sleeve 16 extending between the bosses, around the magnet.
  • the boss is of the same diameter as sleeve 16 and so provides a narrow flux gap 19 between pole piece 18 and bottom roll 42, to create as high an attractive force as possible, while at 1812 the bosses are reduced in diameter and preferably are smoothly finished to receive and drive apron 62 without damaging it. Interior of the bosses.
  • Bottom apron 44 and top apron 62 are urged thus together with sufficient force to enable them to perform the drafting operation in a wide range of appdcations yet their smooth roll driving portions prevent apron damage. which would otherwise bethe result of utilizing the desirably. high forces. employed.
  • each of the magnetic top. rolls including the top apron roll, has its left end of matching polarity with left ends of the other magnetized top-rolls in the series, and accordingly the right end of each top roll has matching polarity withthe right ends of the other top rolls in the series.
  • each magnetized top roll indicating the proper orientation of the roll for replacement in the machine so that the rolls will not be inadvertently exchanged end for end.
  • this visual indication is provided in series I therein by making the left hand gudgeons 80 of the rolls and the receiving bearings of a first size and making the right hand gudgeons 82 and bearings of each of the rolls in a second size, visually substantially different from the first size, so that incorrect placement is mechanically impossible.
  • adjacent series of drafting elements are related in the following manner.
  • the polarity of the ends of the rolls of each series in abutting relationship are the same.
  • the right ends of each top roll in series I have a north polarity and the left ends of the top rolls in series II have a north polarity similarly, abutting ends of series I and III have south polarity.
  • magnetic lower rolls be also employed, then their polarity is reversed with respect to their corresponding top rolls so that adjacent top and bottom roll poles will always be of opposite polarity for maximum attractive force therebetween. With these arrangements, lateral magnetic attraction is avoided, allowing workmen a great latitude of lateral movement of the rolls during maintenance without magnetic interference.
  • the gudgeon size for the north end of each roll, for all series is of the same dimensions, and likewise for the south gudgeons.
  • a double apron device is preferably utilized with desired pressure between the aprons without heavy weights and without saddles, stirrup and levers.
  • integral molded plastic cradle side members are adapted to be positioned upon the apron bar. Rearward projections from each of the cradle side members engages the rear portion of the apron bar. These projections perform the essential and unique function of restraining forward movement of the top apron roll and cradle assembly, thus countering the dynamic reaction of the top apron roll in response to the driving movement of the bottom apron assembly and causing the cradle assembly to effectively pivot about the projection, down against the adjusting screws.
  • each top roll and top apron assembly can be individually removed Without even touching any other element. All can be removed and replaced at the same time with no danger of detri- 6. mental interchange by an unskillful or inattentive workman.
  • FIG. 6 a modification of the invention wherein a magnetic bottom roll is employed, such roll having a smooth shell 92 which may be of a ferromagnetic material such as steel. Fitting snugly in this tubular shell are several permanent magnets 94, spaced from each other partly by non-magnetic sections 95 and partly, also, by soft iron or soft steel pole pieces 96, one of these latter sections being placed inside each of the smooth apron contacting roll portions 97 directly beneath the upper roll bosses 18. With such a magnetic lower roll, attractive forces are increased when permanently magnetic upper rolls are also used. However, it is contemplated that a ferromagnetic upper roll, without permanent magnets but of the same outer configuration above described may also be used to make easier roll removal for cleaning and the like. With such lower rolls, the like adjacent pole arrangement above described with relation to FIG. 5 is preferably utilized to aid in top roll removal even if nonpermanent magnetic top rolls be employed.
  • the invention therefore includes a unique magnetic drafting frame including a series of drafting devices.
  • the apparatus of the invention eliminates many parts heretofore essential, and is extremely simple to adjust and maintain with even the most unskilled personnel.
  • a magnetic drafting mechanism of the character described including front, middle and rear sets of devices for feeding and controlling a strand of discontinuous fibers, said devices being arranged one in advance of the other in a series to act successively on a strand, the front and rear devices comprising rotatably mounted bottom rolls of magnetically attractable material and overlying top rolls having cylindrical magnetic means therein disposed longitudinally therewith and having pole assemblies of ferromagnetic material with a gudgeon extending from the outward end of each pole assembly, front and rear integral slotted supports comprised of non-magnetic material cooperating with said gudgeon members, rotatably positioning said rolls to rest against matching bottom rolls, and the middle device comprising an endless underlying strand supporting lower apron having within its loop a lower magnetically attractable apron driving roll and a fixed apron bar forward of said apron driving roll, and an endless overlying apron mounted above and contacting said lower apron and having within its loop an overlying apron roll
  • a textile drafting machine assembly comprising a series of spaced apart magnetized rolls disposed along a sliver path, each roll having opposed end portions of north and south magnetic polarity, a matching second series of other rolls formed of magnetically attractable material, each of said other rolls cooperating with a magnetized roll of the first plurality to comprise a drafting device, means positioning each of said magnetized rolls so that its left end is of matching polarity With the left ends of every magnetized roll in said series, and so that its right end is of matching polarity with the right ends of every magnetized roll in said series and of opposite polarity to that of the left end.
  • Atextile drafting machine as set forth in c1aim'4, wherein said positioning means includes gudg'eons on each side of said magnetized rolls and complementary bearing surfaces on said machine for supporting said gudgeons, the gudgeons on the left-hand side of said magnetized rolls being of a dilferent size than the gudgeons on the right-hand side of said magnetized rolls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US828247A 1959-07-20 1959-07-20 Magnetic drafting mechanism Expired - Lifetime US3079646A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US828247A US3079646A (en) 1959-07-20 1959-07-20 Magnetic drafting mechanism
GB24443/60A GB964781A (en) 1959-07-20 1960-07-13 Improvements in or relating to textile drafting mechanisms
ES0259744A ES259744A1 (es) 1959-07-20 1960-07-19 Perfeccionamientos en mecanismos de estirado de materiales textiles
CH271464A CH404486A (de) 1959-07-20 1960-07-19 Walzenpaar zur Einwirkung auf Fasermaterial
CH824460A CH384431A (de) 1959-07-20 1960-07-19 Textilstreckmechanismus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US828247A US3079646A (en) 1959-07-20 1959-07-20 Magnetic drafting mechanism

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US3079646A true US3079646A (en) 1963-03-05

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US828247A Expired - Lifetime US3079646A (en) 1959-07-20 1959-07-20 Magnetic drafting mechanism

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US (1) US3079646A (de)
CH (2) CH404486A (de)
ES (1) ES259744A1 (de)
GB (1) GB964781A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150419A (en) * 1962-09-28 1964-09-29 Maremont Corp Magnetically weighted pressure rolls
US3168760A (en) * 1961-04-10 1965-02-09 Armstrong Cork Co Paramagnetic textile roll coverings
US3176352A (en) * 1960-09-29 1965-04-06 Dixie Machine & Tool Company Magnetic means for moving a drafting apron to engage a strand
US3256570A (en) * 1962-08-10 1966-06-21 Nitto Boseki Co Ltd Top roll mounting means for spinning machines
US3336637A (en) * 1964-12-09 1967-08-22 Deering Milliken Res Corp Textile drafting arrangement
US4679390A (en) * 1985-02-22 1987-07-14 Wm. R. Stewart & Sons (Hacklemakers) Limited Opening roller assemblies for open end spinning machines
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2373705B1 (es) * 2008-08-20 2012-12-21 Maschinenfabrik Rieter Ag Dispositivo para hilo con alma y separador de bobinas.
DE102012103610A1 (de) * 2012-04-25 2013-10-31 Rieter Ingolstadt Gmbh Textilmaschine mit wengistens einer mehrere magnetische Bereiche aufweisenden Belastungswalze

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1794578A (en) * 1927-08-25 1931-03-03 Tannwalder Baumwoll Spinnfabri High-draft system for spinning machines
US1897137A (en) * 1933-02-14 And spinning
US2329655A (en) * 1941-02-17 1943-09-14 Saco Lowell Shops Drafting mechanism for spinning and roving frames
US2532275A (en) * 1948-02-20 1950-11-28 Anselm And Company Inc Textile drafting and spinning
US2677858A (en) * 1953-04-08 1954-05-11 Whitin Machine Works Cradle for top aprons as used in high-draft systems
US2686940A (en) * 1947-08-28 1954-08-24 Saco Lowell Shops Textile drawing mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1897137A (en) * 1933-02-14 And spinning
US1794578A (en) * 1927-08-25 1931-03-03 Tannwalder Baumwoll Spinnfabri High-draft system for spinning machines
US2329655A (en) * 1941-02-17 1943-09-14 Saco Lowell Shops Drafting mechanism for spinning and roving frames
US2686940A (en) * 1947-08-28 1954-08-24 Saco Lowell Shops Textile drawing mechanism
US2532275A (en) * 1948-02-20 1950-11-28 Anselm And Company Inc Textile drafting and spinning
US2677858A (en) * 1953-04-08 1954-05-11 Whitin Machine Works Cradle for top aprons as used in high-draft systems

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176352A (en) * 1960-09-29 1965-04-06 Dixie Machine & Tool Company Magnetic means for moving a drafting apron to engage a strand
US3168760A (en) * 1961-04-10 1965-02-09 Armstrong Cork Co Paramagnetic textile roll coverings
US3256570A (en) * 1962-08-10 1966-06-21 Nitto Boseki Co Ltd Top roll mounting means for spinning machines
US3150419A (en) * 1962-09-28 1964-09-29 Maremont Corp Magnetically weighted pressure rolls
US3336637A (en) * 1964-12-09 1967-08-22 Deering Milliken Res Corp Textile drafting arrangement
US4679390A (en) * 1985-02-22 1987-07-14 Wm. R. Stewart & Sons (Hacklemakers) Limited Opening roller assemblies for open end spinning machines
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller

Also Published As

Publication number Publication date
GB964781A (en) 1964-07-22
ES259744A1 (es) 1960-10-16
CH404486A (de) 1965-12-15
CH384431A (de) 1964-11-15

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