US3709332A - Disc-type brake for thread - Google Patents

Disc-type brake for thread Download PDF

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Publication number
US3709332A
US3709332A US00103706A US3709332DA US3709332A US 3709332 A US3709332 A US 3709332A US 00103706 A US00103706 A US 00103706A US 3709332D A US3709332D A US 3709332DA US 3709332 A US3709332 A US 3709332A
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US
United States
Prior art keywords
disc
discs
type brake
bearing surface
brake according
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
US00103706A
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English (en)
Inventor
K Rosen
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Individual
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Individual
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Publication date
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Publication of US3709332A publication Critical patent/US3709332A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B65H59/225—Tension discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/05—Magnetic devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49922—Overedge assembling of seated part by bending over projecting prongs

Definitions

  • the invention relates to a disc-type brake for thread, with two discs mounted with freedom to rotate, the discs being pressed together by an energy store fitted to part of the mounting.
  • a spring serving as the energy store holds both discs together against a stop. Though both the discs are mounted loosely on a spindle, the frictional forces between the one disc and the spring and between the other disc and the stop are so great that a thread running through between the discs is unable to turn them.
  • the disadvantage of this is that with a multi-strand yarn individual strands get caught up, accumulate between the discs and foul the brake. Since the very purpose of the brake is to apply as constant a tension as possible to the thread passing through, this is a serious drawback.
  • a disc brake such as described produces difficulties in the insertion of the thread, which, when tension is low, will not readily enter between the discs.
  • magnets are provided by way of energy stores.
  • permanent bar magnets are arranged in a ring about a stationary spindle parallel to them.
  • the spindle carries a loose bush, on which the two discs are mounted, loosely again.
  • this brake also, of a too lightly tensioned thread not being drawn in between the discs.
  • two other existing disc brakes fitted with magnetic energy stores in both of which the magnet is in the form of a closed ring.
  • the disc that is not magnetizable and lies nearer to the magnet is mounted rigidly on a stationary spindle. All these disc brakes are somewhat complicated in design.
  • the purpose of the invention is to provide a disc brake of the type referred to in the preamble, which, while being of simple and robust construction, is trouble-free in operation and readily takes even a weakly tensioned thread between its discs.
  • This oblique setting is not permanent, nor is it at any particular angle, but is brought about by the thread itself as the tension on the thread rises.
  • the thread is carried round a change-of-direction roller or the like at a distance from the brake, while the disc intended to be set obliquely is joined to a tilting bearing.
  • This bearing is positioned off center in relation to the disc, at a point remote from where the thread is diverted.
  • the tilting bearing lies at that point on the disc periphery which is remote from the energy store. ln this brake, both discs are non-rotary.
  • the oblique setting necessitates not only a change of direction for the thread, but also a separate bearing.
  • the bearing surface should be conical and should lie concentric with the axis of rotation. This is a simple means of ensuring the obliquity of the two discs even when both of them are turning in relation to a stationary energy store. There is no reason, moreover, why the latter should not be spaced away from the discs, and it may therefore take the form of a conventional adjustable magnet. Then, as the one disc rotates, it carries out a tumbling movement, yet it always lies on the other disc with a pressure determined by the power of the energy store and the contact area is governed by the shape of the bearing surface. The braking action so achieved can thus be precisely pre-determined.
  • the energy store may well be a magnet, preferably a permanent magnet, with a conventional means of axial adjustment for regulating the contact pressure between the discs.
  • the brake made in accordance with the invention requires only one single magnet, fitted eccentrically in relation to the axis of rotation, which simplifies construction.
  • a particularly simple design for a disc-type brake which is especially favorable for the brake described above in accordance with the invention, but also has advantages for brakes with central energy stores, and for which separate protection is therefore sought, provides for the discs and their spindle to be combined into a single unit that can be inserted into the mounting portion.
  • the advantages of this feature lie both in simplicity of production and in the ready interchangeability of such units in cases where changes are made in the method of working and/or the nature of the thread used in the processing installation to which the mounting portion is secured.
  • Another advantage is that the spindle that can be loosely inserted into the mounting portion ensures particularly easy running of both discs.
  • the energy store may then well be permanently incorporated in the mounting portion, but another possibility is for it to be fixed to the said unit.
  • one disc is rigidly mounted on the spindle.
  • At least one of the discs may contain openings through which scourings can readily pass to the outside.
  • the brake thus becomes self-cleaning, so that any falling-off in braking action is avoided.
  • FIG. 1 shows a somewhat diagrammatic representation of a disc-type brake such as now proposed
  • FIG. 2 shows the same brake as FIG. I, as seen from below;
  • FIG. 3 is a plan of the brake shown in FIG. 1;
  • FIG. 4 is an exploded view showing the components of the brake shown in FIG. 1;
  • FIG. 5 is another example of a brake embodying the principle of the invention.
  • the brake shown in FIG. I has a mounting portion, 1, which can be attached by some means (not shown) to a thread processing installation.
  • This mounting is circular in cross-section, as can be seen from FIGS. 2 and 3.
  • a fixed spindle, 2 (FIG. 4) is fitted centrally in the mounting, from which it projects.
  • a magnet, 3 Also fixed within the mounting, parallel to but at a distance from the spindle, is a magnet, 3, the action of which is exerted axially.
  • the disc 4 which is nearer to the mounting, is made of non-magnetizable material in the present case, plastics.
  • the disc 5, which is remote from the mounting, is made of magnetizable material.
  • the plastics disc 4 carries a hub, 6, containing a bore, 7, by which the disc can be fitted on to the fixed spindle 2.
  • the disc 4 incorporates a concentric conical bearing surface, 8, for the disc 5.
  • This bearing surface 8 is made in one both with the disc 4 and with a bearing bushing, 9, of relatively large diameter, which terminates in a shallow flange, 10.
  • the bearing bushing 9 serves as anchorage for the disc 5, which is prevented from falling off by the flange 10.
  • the disc 5 can be passed over the bushing 9 because the central opening in the disc, the diameter of which is the same, except for a slight degree of play, as that of the bushing 9, is extended by other openings, 11, which leave between them tabs, 12, which are slightly bent upwards and can be sprung a trifle to enable them to'be pushed over the flange I0.
  • the thread F drawn in chain-line in FIGS. 1 and 3, enters this gap and thus finds its way between the discs 4 and 5. Since, owing to the relatively large diameter of the bushing 9, it exerts a frictional force acting eccentrically on the two discs (FIG. 3), it causes them to rotate with it in the direction shown by the arrow A, the disc 5 executing a tumbling movement on the disc 4.
  • the amount of contact pressure between the two discs can be regulated either by making the spindle 2 adjustable for height (not shown in the drawing) or providing for axial displacement of the magnet 3 (likewise not shown).
  • FIG. 5 Another form of disc brake is shown in FIG. 5.
  • a positioning member, 13, which carries an external thread, can be varied in height by rotation in a threaded bore, 14, in the mounting 1'. This rotation is brought about with the aid of the circular plate I5, made in one piece with the plastics positioning member 13.
  • a spindle, 16, for the discs can be inserted in the positioning member 13.
  • This spindle I6 is rigidly fixed to the plastics disc 4', which is made in one piece with a bearing bushing, 9, for the magnetic disc 5, as described in connection with FIG. 1.
  • the two discs 4' and 5 form with the spindle 16 a unit, which it is easy to insert into or remove from the mounting.
  • the brake shown in FIG. 5 has a substantially ring-shaped permanent magnet, 3'.
  • the invention is not limited to the practical examples illustrated.
  • the two discs may form a unit with a spindle, as in the example appearing in FIG. 5, in which event the mounting will be provided with a suitable bushing to take the spindle.
  • the brake shown in FIG. 5 can likewise have a magnet placed off center and the disc 4' may have a conical bearing surface.
  • magnets used be permanent magnets or electro-magnets.
  • a spring may be used for the off-center energy store. According to circumstances, this spring may be combined with the two discs and the spindle to form a single unit and be fitted with it to the mounting.
  • the bearing surface may be rigidly attached to the magnetizable disc or made in one with it.
  • a further possibility, in the case of an arrangement in which the energy store and one disc do not alter their relative positions whether the energy store rotates as well or both components are stationary is for the bearing surface to be eccentric in shape.
  • a disc-type brake for a thread comprising support means, a pair of rotatable discs mounted on said support means, said pair of discs being positioned adjacent one another and having opposed bearing surfaces, and actuating means for causing the bearing surfaces of said discs to be pressed against one another, the improvement wherein said actuating means acts on said discs eccentrically relative to their rotational axes for causing said opposed bearing surfaces to be pressed against one another, the bearing surface of one of said discs being nonplanar and inclined relative to the bearing surface of the other disc for causing the rotary planes of said discs to form a con tinuous angle between them as the discs rotate, said discs contacting one another only at a location adjacent the actuating means to form the vertex of said angle when so contacted.
  • a disc-type brake according to claim 1, wherein the nonparallel and inclined bearing surface is made of one piece with said one disc.
  • one of said discs has a central opening therein, and the other of said discs having a central hub fixedly secured thereto and extending axially outwardly beyond the bearing surface thereof, said hub extending through the central opening of said one disc for movably supporting said other disc.
  • a disc-type brake according to claim 8 wherein the free end of said hub has a radially outwardly extending flange thereon, and wherein said one disc has a plurality of resilient tabs positioned in surrounding relationship to the central opening for enabling said flange to be passed through said opening due to resilient deflection of said tabs, whereby said tabs then return to their normal position wherein they project radially inwardly beyond said flange for retaining said one disc on said hub.

Landscapes

  • Braking Arrangements (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
US00103706A 1970-01-05 1971-01-04 Disc-type brake for thread Expired - Lifetime US3709332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000268A DE2000268C3 (de) 1970-01-05 1970-01-05 Tellerbremse für Fäden

Publications (1)

Publication Number Publication Date
US3709332A true US3709332A (en) 1973-01-09

Family

ID=5759058

Family Applications (1)

Application Number Title Priority Date Filing Date
US00103706A Expired - Lifetime US3709332A (en) 1970-01-05 1971-01-04 Disc-type brake for thread

Country Status (3)

Country Link
US (1) US3709332A (de)
DE (1) DE2000268C3 (de)
GB (1) GB1320389A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123014A (en) * 1977-03-21 1978-10-31 Milliken Research Corporation Yarn tension control
US4398681A (en) * 1981-04-06 1983-08-16 W. Schlafhorst & Co. Thread brake for creels
US4635391A (en) * 1985-06-13 1987-01-13 Early Susan E Fishing line gripping and release assembly for attachment to a floatation member
US4901942A (en) * 1986-09-03 1990-02-20 Norddeutsche Faserwerke Gmbh Warping mill and disk thread brake
US5573192A (en) * 1995-08-15 1996-11-12 Tseng; Hsien-Chang Thread tensioning device for a sewing machine
US6224009B1 (en) * 1998-07-17 2001-05-01 L.G.L. Electronics S.P.A. Device for modulated braking of a weft yarn for textile machines

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH676589A5 (de) * 1988-09-16 1991-02-15 Mefina Sa
DE4130301A1 (de) * 1991-09-12 1993-03-18 Schlafhorst & Co W Rotierend angetriebene bremstelleranordnung eines fadenspanners
DE19531579C1 (de) * 1995-08-28 1997-01-23 Barth Tex Instr & Software Gmb Fadenbremse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1824669A (en) * 1927-11-12 1931-09-22 Wood Newspaper Mach Corp Brake for paper guide rolls
US2190261A (en) * 1937-12-15 1940-02-13 Universal Winding Co Tension device
US2593045A (en) * 1951-02-21 1952-04-15 Maroshick Max Fishing reel
US2614773A (en) * 1950-11-20 1952-10-21 Mohawk Carpet Mills Inc Tension device
US2881988A (en) * 1956-06-12 1959-04-14 Specialties Dev Corp Yarn tensioning device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1824669A (en) * 1927-11-12 1931-09-22 Wood Newspaper Mach Corp Brake for paper guide rolls
US2190261A (en) * 1937-12-15 1940-02-13 Universal Winding Co Tension device
US2614773A (en) * 1950-11-20 1952-10-21 Mohawk Carpet Mills Inc Tension device
US2593045A (en) * 1951-02-21 1952-04-15 Maroshick Max Fishing reel
US2881988A (en) * 1956-06-12 1959-04-14 Specialties Dev Corp Yarn tensioning device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123014A (en) * 1977-03-21 1978-10-31 Milliken Research Corporation Yarn tension control
US4398681A (en) * 1981-04-06 1983-08-16 W. Schlafhorst & Co. Thread brake for creels
US4635391A (en) * 1985-06-13 1987-01-13 Early Susan E Fishing line gripping and release assembly for attachment to a floatation member
US4901942A (en) * 1986-09-03 1990-02-20 Norddeutsche Faserwerke Gmbh Warping mill and disk thread brake
US5573192A (en) * 1995-08-15 1996-11-12 Tseng; Hsien-Chang Thread tensioning device for a sewing machine
US6224009B1 (en) * 1998-07-17 2001-05-01 L.G.L. Electronics S.P.A. Device for modulated braking of a weft yarn for textile machines

Also Published As

Publication number Publication date
GB1320389A (en) 1973-06-13
DE2000268B2 (de) 1973-12-20
DE2000268C3 (de) 1974-07-18
DE2000268A1 (de) 1971-07-15

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