US2924064A - hedtmann etal - Google Patents

hedtmann etal Download PDF

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Publication number
US2924064A
US2924064A US2924064DA US2924064A US 2924064 A US2924064 A US 2924064A US 2924064D A US2924064D A US 2924064DA US 2924064 A US2924064 A US 2924064A
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United States
Prior art keywords
magnet
bobbin
carrier
spindle
magnetic
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/86—Multiple-twist arrangements, e.g. two-for-one twisting devices ; Threading of yarn; Devices in hollow spindles for imparting false twist
    • D01H7/862—Arrangements for holding the bobbin in a fixed position

Definitions

  • This invention relates to double twist spindles, and more particularly to magnetic brakes for arresting undesired rotary displacement of the bobbins used in double twist spindles.
  • locking devices had to be provided for operation, for example, as soon as the mutually tuned magnets were no longer in proper juxtaposition.
  • These locking devices as a rule acted directly on the bobbin carrier by means of brakes resulting in tear of the yarn in the outer balloon; other devices simply shut ofi the drive for the double twist spindle.
  • the present invention contemplates supporting the permanent magnet or soft iron armature disposed on the bobbin carrier, so it is displaceable with respect to said carrier. According to the invention, if a shock causes a displacement of the bobbin carrier, the magnet mounted on it is carried along through a small angle until the tangential force component resulting from the magnetic field action exceeds the frictional resistance of the magnet on the bobbin carrier. As soon as this condition is met, the magnet will move no further whereas the carrier will continue its movement until under the influence of the frictional force deriving from the arrested magnet, it, too, will come to a standstill.
  • the magnet or armature can no longer be removed from the field of action of the stationary outer magnet by shocks of any magnitude.
  • the movable support of the magnet is effective in preventing the bobbin carrier from engaging in any sustained rotation following a shock-prompted displacement of an oscillatory or rotary character.
  • the bobbin is no longer locked in any one position as in prior art devices, but is free to yield to any shocks, with any excess energy absorbed not by a permanent rotation but by a conversion into frictional heat. Only in response to very material deviation forces which exceed the braking moment of the magnet support, caused, for example, by excessive friction between the bobbin carrier and the rapidly revolving spindle, even the present bobbins may start revolving slowly. In this rare event, it will still be necessary to arrest the spindle and repair it.
  • this movable arrangement of the magnets is the friction factor of the surfaces engaging one another, of the magnet or soft iron armature and the bobbin carrier, respec tively.
  • This factor should be so selected that the magnet on the bobbin carrier will remain under the influence of the outer magnet.
  • This factor can be varied by a corresponding variation of the materials of which the parts are made, or by a variation of the qualities of the braking surfaces or also by means of lubricants. Any increase of the magnetic field action will also increase the braking action on the bobbin carrier.
  • Fig. 1 is a purely diagrammatic section along line I-I in Fig. 2, illustrating only such essential parts as are necessary to indicate the relative displacement of the several parts;
  • Fig. 2 is a sectional side view of a double twist spindle according to the invention.
  • Fig. 3 is a similar sectional side view of a modification.
  • the normally stationary carrier for the supply bobbin is indicated at 1.
  • a first, stationary magnet which may be fixedly mounted on the spindle support, is shown at 2, While 3 denotes the second magnet arranged for frictional displacement with respect to the supply bobbin carrier 1. Owing to the effect of the magnetic forces, the second magnet 3 is normally at rest in a position just opposite the stationary first magnet 2 with its arched face pressed against the circumference of the carrier 1.
  • the second magnet 3 is first taken along, but when the tangential force component resulting from the magnetic field action overcomes the friction between it and the carrier, it will be arrested in the position indicated in dotted lines at 4, with the result that the increased friction now prevailing between the second magnet 3 and the circumferential rim portion of the supply bobbin carrier 1 will brake and ultimately arrest the rotary displacement of the carrier.
  • the supply bobbin carrier is bound to be braked and arrested by the friction with the arrested second magnet 3, without it being necessary to stop the spindle and thus interrupt operations altogether.
  • the first, stationary magnet 2 may be mounted, by means of a bracket 6, on the support 20 for the spindle.
  • the second magnet or iron armature 3 is supported for displacement on the bobbin carrier generally indicated at 1 which comprises a body portion 11 and a groove wherein the magnet 3 is disposed for sliding displacement.
  • the rotary portion of the double twist spindle is shown at 5.
  • the double twist spindle comprises the driving whorl 12, the thread storage disk 13, the in-let portion 14, the bobbin 15, the bearing 17 interposed between the spindle and the bobbin, the spindle shaft 18 and the exit channel 19 in the thread storage disk 13.
  • the twisting spindle itself is supported, by means of ball hearings, in the support 20.
  • the yarn is shown at 16, and its path through the device is clearly shown in Fig. 2.
  • the portion 5 rotates along with the thread storage disk 13 and the spindle shaft 18, while the bobbin carrier 1, with its portions 10 and 11, is normally stationary, except when it is set to oscillate or rotate under the influence of outside forces, in which case it is braked and its movement arrested by the magnetic bobbin brake according to the invention.
  • the stationary magnet 22 is mounted on a bracket 26 which in turn, may be mounted on a support corresponding to the support shown at 20 in Fig. 2, while the movable magnet 23 is mounted for displacement on the normally stationary bobbin carrier 31, by means of a lever arm 27 mounted on a brake ring 29 which is movably supported in an annular groove of a brake disk 28 forming part of the bobbin carrier 31.
  • a double twist spindle comprising in combination, a twisting spindle, a support for said twisting spindle, a first magnet firmly mounted on said support, a normally stationary carrier for the bobbin freely mounted on said twisting spindle so as to permit the relative rotary motion of said spindle, and a second magnet mounted on said bobbin carrier for displacement with respect to said carrier, whereby on an abnormal rotary displacement of the bobbin carrier, said second magnet is taken along by said carrier until the tangential force component resulting from the magnetic field action overcomes the friction between said second magnet and said carrier, so as to arrest said second magnet and thereby, in turn, brake and arrest the rotary displacement of said carrier.
  • a double twist spindle according to claim 1, wherein the bobbin carrier includes a brake portion comprising a groove and a brake ring arranged in said groove, and the second magnet is linked to said brake ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Looms (AREA)
US2924064D 1953-07-14 hedtmann etal Expired - Lifetime US2924064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE323292X 1953-07-14

Publications (1)

Publication Number Publication Date
US2924064A true US2924064A (en) 1960-02-09

Family

ID=6172477

Family Applications (1)

Application Number Title Priority Date Filing Date
US2924064D Expired - Lifetime US2924064A (en) 1953-07-14 hedtmann etal

Country Status (6)

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US (1) US2924064A (en(2012))
BE (1) BE528956A (en(2012))
CH (1) CH323292A (en(2012))
FR (1) FR1103177A (en(2012))
GB (1) GB756103A (en(2012))
NL (1) NL80404C (en(2012))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298167A (en) * 1964-07-02 1967-01-17 Keyser Johann Jacob Two-for-one twisting spindle
US3299623A (en) * 1964-07-02 1967-01-24 Keyser Johann Jacob Two-for-one twisting spindle with rotatably journalled hollow shank
US3321898A (en) * 1963-10-17 1967-05-30 Mackie & Sons Ltd J Textile machines
US3338043A (en) * 1964-09-25 1967-08-29 Palitex Project Co Gmbh Multiple twist spindle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949621A (en) * 1930-12-24 1934-03-06 Celanese Corp Textile machinery
FR872986A (fr) * 1940-06-11 1942-06-25 Glanzstoff Ag Broche retordeuse à double torsion
US2463636A (en) * 1948-01-21 1949-03-08 John L Meade Yarn twisting apparatus
US2507573A (en) * 1944-12-07 1950-05-16 Warner Electric Brake Mfg Co Electromagnetic friction device
US2534496A (en) * 1948-03-17 1950-12-19 Howe Machinery Company Inc Constant tension elongated material handling mechanism
US2605602A (en) * 1952-08-05 Koella
US2641896A (en) * 1949-10-11 1953-06-16 Landolt Karl Double twist spindle
US2692471A (en) * 1949-10-12 1954-10-26 Landolt Karl Bearing for double-twist spindles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605602A (en) * 1952-08-05 Koella
US1949621A (en) * 1930-12-24 1934-03-06 Celanese Corp Textile machinery
FR872986A (fr) * 1940-06-11 1942-06-25 Glanzstoff Ag Broche retordeuse à double torsion
US2507573A (en) * 1944-12-07 1950-05-16 Warner Electric Brake Mfg Co Electromagnetic friction device
US2463636A (en) * 1948-01-21 1949-03-08 John L Meade Yarn twisting apparatus
US2534496A (en) * 1948-03-17 1950-12-19 Howe Machinery Company Inc Constant tension elongated material handling mechanism
US2641896A (en) * 1949-10-11 1953-06-16 Landolt Karl Double twist spindle
US2692471A (en) * 1949-10-12 1954-10-26 Landolt Karl Bearing for double-twist spindles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321898A (en) * 1963-10-17 1967-05-30 Mackie & Sons Ltd J Textile machines
US3298167A (en) * 1964-07-02 1967-01-17 Keyser Johann Jacob Two-for-one twisting spindle
US3299623A (en) * 1964-07-02 1967-01-24 Keyser Johann Jacob Two-for-one twisting spindle with rotatably journalled hollow shank
US3338043A (en) * 1964-09-25 1967-08-29 Palitex Project Co Gmbh Multiple twist spindle

Also Published As

Publication number Publication date
BE528956A (en(2012))
NL80404C (en(2012))
FR1103177A (fr) 1955-10-31
CH323292A (de) 1957-07-31
GB756103A (en) 1956-08-29

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