US3581687A - Bobbin winding device for sewing machines - Google Patents

Bobbin winding device for sewing machines Download PDF

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Publication number
US3581687A
US3581687A US797391A US3581687DA US3581687A US 3581687 A US3581687 A US 3581687A US 797391 A US797391 A US 797391A US 3581687D A US3581687D A US 3581687DA US 3581687 A US3581687 A US 3581687A
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Prior art keywords
bobbin
slide
shaft
driven wheel
wheel
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Expired - Lifetime
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US797391A
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English (en)
Inventor
Gunter Meier
Willi Meier
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GM Pfaff AG
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GM Pfaff AG
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith

Definitions

  • a bobbin winding device for sewing machines comprises a bobbin holder having a shaft journaled in a wall of the sewing machine housing and a driven friction wheel having a shaft mounted telescope-fashion in said first shaft and urged into driving engagement with a continuously rotating driving wheel by a spring operably interposed between said shafts.
  • a flat control spring is disposed at right angle to said shafts and has an intermediate portion urging the driven wheel to a position of disengagement from the driving wheel.
  • a slide operable by a control member between a rest position and an operative position and camming with said control spring enables the latter to be disengaged from the driving wheel, to cause engagement of the driving wheel with the driven wheel for the starting of a bobbin winding operation.
  • the control member acts as a stop entering the outer space between the flanges of a bobbin being wound, to initiate the automatic stoppage of the 2,056,829 10/1936 Colegrove et a1 112/218 winding operation upon the outer thread winding turns engag 4/1952 Hirsch et al 112/218 ing said stop.
  • the present invention relates to bobbin winding devices for sewing machines of the type including a rotatively mounted bobbin holder and a driven friction wheel fast for rotation with an axiably slidable relative to the shaft of said holder, said wheel being subject to the action of a coupling spring urging the same into engagement with a driving wheel, on the one hand, and to the action of a relatively heavier decoupling or control spring operable between an operative position and a rest position by means of a control key or the like member acting as a stop or sensor of a predetermined amount of thread wound upon the bobbin.
  • the known bobbin winding devices ordinarily comprise a bobbin winding shaft having one end adapted to receive a bobbin to be wound and carrying a friction wheel at its opposite end arranged for deflection or displacement towards and away from a driving wheel.
  • the projection of at least the free end of the bobbin shaft beyond the housing of the sewing machine makes it necessary, in the interest of ensuring an adequate space for both the mounting and displacement of the bobbin shaft, to provide a sufficiently large aperture in the sewing machine housingwall, whereby to allow dust and other foreign matter to penetrate into the interior of the machine. While this disadvantage may be obviated by the use of an axially displaceable bobbin shaft, such a construction is objectionable by project ing to an increased extent beyond the housing in its rest position, as determined by its operating stroke or displacement.
  • bobbin winding devices wherein the bobbin shaftis journaled in a special frame or mounting fixture disposed within the housing of the sewing machine, with only the driven friction wheel mounted for rotation at one end of said shaft being displaceable in the axial direction.
  • the driven friction wheel is urged, by the aid of a compression spring arranged with one end abutting against the wheel and with its opposite end abutting against the frame, into engagement with a driving wheel.
  • a compression spring arranged with one end abutting against the wheel and with its opposite end abutting against the frame, into engagement with a driving wheel.
  • an axially displaceable switching rod having one of its ends pivotally connected to one end of a two-armed lever also supported by said frame.
  • the switching rod is retracted, against the action of its compression spring, from the frame to an extent as to deflect the lever, to release the driven wheel and to cause an arcuate resilient feeler to enter the space between the flanges of the bobbin to be wound, whereupon release of the rod will result in its arrest in the switching position by engagement with the inside of the frame.
  • Such a control and arrest of the winding device has the great disadvantage, among others, that the arcuate feeler is in constant sliding engagement with the inside wall of one of the bobbin flanges during the entire winding operation, whereby to result in possible damage to the latter after prolonged use, not to mention the sliding or friction noise caused thereby.
  • An important object of the present invention is, therefore, the provision of an improved bobbin winding device for sewing machines of the referred to type by which the foregoing and related disadvantages and shortcomings of the known bobbin winders are substantially eliminated or minimized.
  • a more specific object of the invention is the provision of a bobbin winder of the type described which, upon being set in operation manually, will be arrested automatically upon the winding of a predetermined amount of thread by the action of a feeler responsive to the diameter of the spool of thread being wound, substantially without involving any frictional or sliding engagement with the bobbin flanges or other parts of the device.
  • Still another object of the invention is the provision of an automatic bobbin winding device of the referred to type, especially suitable for mounting in an unobtrusive manner in the top wall of a sewing machine housing adjacent to the hand wheel, which device projects to a minimum distance, or does practically not project, from the outer surface of said wall in both the operative and inoperative positions of said device.
  • Yet another object of the invention is the provision of bobbin winding mechanism of relatively simple and compact construction, suitable for structural incorporation in a wall portion, preferably the top wall, of a conventional sewing machine.
  • FIG. 1 is a perspective view showing part of the cover or top wall of the overhanging arm forming part of the housing of a conventional sewing machine and having mounted therein a bobbin winding device constructed in accordance with the principles of the invention;
  • FIG. 2 is a sectional view, to an enlarged scale, taken on line 11-11 of FIG. 1 and showing the winding mechanism in the operative or engaged position of the driving and driven wheels;
  • FIG. 3 is a plan view of FIG. 2, shown with the cover omitted, to reveal the inside construction of the device.
  • the invention involves generally the provision of a bobbin winding device of the referred to type, wherein the driven friction wheel is fitted with a shaft telescoping within the shaft of the bobbin holder, with a coupling spring urging the driven wheel into engagement with a driving wheel disposed operably between both said shafts, wherein furthermore the decoupling spring is in the form of a flat bent spring disposed at right angle to the axis of the bobbin winder shaft and having an intermediate portion engaging the side of the driven wheel adjoining the driving wheel, and finally which device includes a control slide parallel to the axis of said shaft and disposed between the housing wall of the machine and the decoupling spring, said slide having a bevelled end portion adapted to cam with the free bent end of said decoupling spring, in such a manner as to disengage the driven wheel from the driving wheel, in the normal or rest position of said device, by said decoupling spring acting against said coupling spring, on the one hand,
  • a further advantage of the bobbin winder according to the present invention is the fact that, aside from the saving of space resulting from the use of a flat decoupling spring in conjunction with the telescopic mounting of the bobbin holder and driven wheel shafts, the entire device assumes a rather flat construction, whereby to enable its ready and unobtrusive structural incorporation in existing sewing machine constructrons.
  • the bobbin holder is fitted with a permanent holding magnet formed with a dish-shaped supporting surface and a central aligning stud conforming with the shape of the bobbins.
  • the bobbin holder may be mounted with its supporting surface substantially flush with the outer surface of the housing wall of the sewing machine, thus giving the winder a harmonic and unobtrusive appearance, in the manner as will become further apparent as the description proceeds in reference to the drawing.
  • the numeral 1 denotes the cover of the overhanging arm of a conventional sewing machine in which is mounted, close to the handwheel of the machine, a bobbin winding device according to the invention, said device comprising a bobbin support or holder collectively denoted by the numeral 2, a driven friction wheel 3 and a control member 4 serving for the connection and disconnection of the device for the carrying out of a bobbin winding operation.
  • the bobbin holder in the example shown, consists of a hollow shaft 5 having a flange 6 and being rotatively mounted in a recess in the top wall of the cover 1 through a shouldered intermediate insert or bearing 8 fitted in said recess, shaft 5 being locked against axial displacement relative to said insert by a clamping washer 7.
  • an outer annular permanent holding magnet 10 mounted substantially flush with the outer surface of the cover 1, on the one hand, and a central aligning stud 11 of nonmagnetic material, on the other hand.
  • the upper slightly inwardly chamfered surface of the magnet conforms with the supporting surface of the bobbin 9 mounted concentrically with the stud 11.
  • both wheels 3 and 16 are in the form of bevel friction wheels.
  • Hollow shaft 12 has one or a pair of diametrical slots 13 which are engaged by a crosspin 14 mounted within the shaft 5, to connect the wheel 3 for rotation with the bobbin holder, while allowing of relative axial displacement of the shafts.
  • a coiled compression spring 15 Disposed within the inner space of the hollow shaft 12 is a coiled compression spring 15 abutting at one end against the pin 14 and abutting at its opposite end against the upper surface of the wheel 3, whereby to normally urge said wheel into engagement with the driving wheel 16 in the operative position of the winder as shown in FIG. 2.
  • a flat bent control spring 17 disposed substantially at right angle to the axis of the bobbin holder 2, said spring having an intermediate portion adapted to engage the lower surface of the wheel 3, to lift and disengage the same from the driving wheel against the action of spring 15, in the rest or inoperative position of the winding device.
  • the spring 17 is disengaged from the wheel by the position of the control member 4, in the manner further understood from the following.
  • control member includes a slide 19, disposed on the side of the wheel 3 opposite to the spring 17, said slide being displaceably mounted in the frame or cover 1 in a direction substantially parallel to said spring or at right angle to the axis of the bobbin holder.
  • the slide 19 carries a connecting member 20 passing through an aperture in the cover and terminating in an operating knob or key 21 projecting outwardly from said cover, on the one hand, and has a chamfered end adapted to cam with the free bent end 18 of the spring 17, on the other hand, in the manner as will become more apparent from the description of the operation of the device.
  • the key 21 acts as a stop or feeler to ascertain a definite amount of thread wound upon the bobbin 9, thereby to initiate an automatic stoppage of the winding operation, after manual starting of a bobbin winding cycle of the device by means of the key 21.
  • the end of the latter freely engages the outer space between the flanges of the bobbin 9 to an extent, to ensure an optimally uniform winding and sensing of the outer diameter of the coil being wound, on the one hand, while principally rendering impossible any clamping of the thread between the key and the flanges of the bobbin.
  • the lengthwise dimension of the key 21 is such as to fully cover the aperture in the housing 1 passing the member 20, in both the inoperative and operative positions of the key.
  • the device may be designed for both manual starting and stopping of a winding operation or cycle.
  • the key 21 is designed as a switch without entering the bobbin 9. After a desired amount of thread has been wound, the operation is arrested by returning the key to its inoperative position, or away from the winding axis of the device, in a manner readily understood.
  • a bobbin winder comprising:
  • a bobbin holder having a first shaft journaled in a wall portion of said housing and locked against axial displacement, said holder adapted to receive a bobbin to be wound,
  • a driven wheel having a second shaft and means axially slidably connecting said second shaft to said first shaft
  • a bent flat coupling spring secured at one end to said housing in cantilever-fashion, said spring having a free curved end portion and an intermediate portion directly bearing on the opposite side of said driven wheel, to urge said driven wheel in the direction of disengagement from said driving wheel against the action of said biasing spring, and
  • a control slide mounted in said housing transversely to the axis of said bobbin holder and operable between a rest positioniand an operative position, said slide having an end portion adapted to cam with the end portion of said coupling spring, whereby to retract said coupling spring from said driven wheel, to efiect driving engagement of said driven wheel with said driving wheel by said biasing spring in the operative position of said slide, and to disengage said driven wheel from said driving wheel by said coupling spring in the rest position of said slide, respectively.
  • a bobbin winder as claimed in claim 1 including an operating member connected tosaid slide and extending through an aperture of saidwall portion, to enable starting and stopping of the bobbin winding operations.
  • a bobbin winder as claimed in claim 1 including an operating member upon the outside of said wall portion adjoining said bobbin holder, connecting means between said slide and said member passing through an aperture of said wall portion, and a thread feeler extending from said member and adapted to enter, in the operative position of said slide, the space between the flanges of a bobbin being wound, to initiate the automatic stoppage of the bobbin winding operation upon the outer thread turns engaging said feeler, to displace said member, upon previous manual operation of said slide by said member to its operative position for the starting of a bobbin winding operation.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US797391A 1968-02-08 1969-02-07 Bobbin winding device for sewing machines Expired - Lifetime US3581687A (en)

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Application Number Priority Date Filing Date Title
DEP0030863 1968-02-08

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US3581687A true US3581687A (en) 1971-06-01

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US (1) US3581687A (de)
CH (1) CH479742A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670974A (en) * 1970-02-06 1972-06-20 Fritz Gegauf Ag Bernina Nah Ma Releasable winding mechanism for sewing machines
US4792104A (en) * 1987-05-07 1988-12-20 Southridge Corporation Apparatus for forming yarn transfer tails
US5865394A (en) * 1997-08-12 1999-02-02 Giese; Thomas G. M. Self contained bobbin winder
US20060065175A1 (en) * 2004-09-28 2006-03-30 Brother Kogyo Kabushiki Kaisha Horizontal rotary hook for sewing machine
US20150308023A1 (en) * 2014-04-24 2015-10-29 Janome Sewing Machine Co., Ltd. Horizontal Rotary Hook of Sewing Machine
USD843977S1 (en) * 2017-07-11 2019-03-26 Aiwu Wang Winder
US20210404101A1 (en) * 2020-06-26 2021-12-30 Janome Sewing Machine Co., Ltd. Bobbin winding device and sewing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259914A (en) * 1980-07-28 1981-04-07 The Singer Company Bobbin winding mechanism for a sewing machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056829A (en) * 1933-03-31 1936-10-06 Charles E Colegrove Sewing machine
CH273922A (de) * 1949-06-11 1951-03-15 Schweizerische Naehmaschinen F Spulvorrichtung an einer Nähmaschine.
US2592516A (en) * 1946-10-17 1952-04-08 Willcox & Gibbs Sewing Machine Bobbin winder for sewing machines
US3059601A (en) * 1960-06-01 1962-10-23 Pfaff Ag G M Bobbin winding device for sewing machines
US3322084A (en) * 1964-10-22 1967-05-30 Singer Co Bobbin winders for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056829A (en) * 1933-03-31 1936-10-06 Charles E Colegrove Sewing machine
US2592516A (en) * 1946-10-17 1952-04-08 Willcox & Gibbs Sewing Machine Bobbin winder for sewing machines
CH273922A (de) * 1949-06-11 1951-03-15 Schweizerische Naehmaschinen F Spulvorrichtung an einer Nähmaschine.
US3059601A (en) * 1960-06-01 1962-10-23 Pfaff Ag G M Bobbin winding device for sewing machines
US3322084A (en) * 1964-10-22 1967-05-30 Singer Co Bobbin winders for sewing machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670974A (en) * 1970-02-06 1972-06-20 Fritz Gegauf Ag Bernina Nah Ma Releasable winding mechanism for sewing machines
US4792104A (en) * 1987-05-07 1988-12-20 Southridge Corporation Apparatus for forming yarn transfer tails
US5865394A (en) * 1997-08-12 1999-02-02 Giese; Thomas G. M. Self contained bobbin winder
US20060065175A1 (en) * 2004-09-28 2006-03-30 Brother Kogyo Kabushiki Kaisha Horizontal rotary hook for sewing machine
US7171914B2 (en) * 2004-09-28 2007-02-06 Brother Kogyo Kabushiki Kaisha Horizontal rotary hook for sewing machine
US20150308023A1 (en) * 2014-04-24 2015-10-29 Janome Sewing Machine Co., Ltd. Horizontal Rotary Hook of Sewing Machine
US10081895B2 (en) * 2014-04-24 2018-09-25 Janome Sewing Machine Co., Ltd. Horizontal rotary hook of sewing machine
USD843977S1 (en) * 2017-07-11 2019-03-26 Aiwu Wang Winder
US20210404101A1 (en) * 2020-06-26 2021-12-30 Janome Sewing Machine Co., Ltd. Bobbin winding device and sewing machine
US11959213B2 (en) * 2020-06-26 2024-04-16 Janome Sewing Machine Co., Ltd. Bobbin winding device and sewing machine

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CH479742A (de) 1969-10-15

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