US3670974A - Releasable winding mechanism for sewing machines - Google Patents

Releasable winding mechanism for sewing machines Download PDF

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Publication number
US3670974A
US3670974A US108517A US3670974DA US3670974A US 3670974 A US3670974 A US 3670974A US 108517 A US108517 A US 108517A US 3670974D A US3670974D A US 3670974DA US 3670974 A US3670974 A US 3670974A
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United States
Prior art keywords
winding mechanism
friction wheel
shaft
pin
carrier
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Expired - Lifetime
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US108517A
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English (en)
Inventor
Odette Ueltschi
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Fritz Gegauf AG
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Fritz Gegauf AG
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Filing date
Publication date
Application filed by Fritz Gegauf AG filed Critical Fritz Gegauf AG
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Publication of US3670974A publication Critical patent/US3670974A/en
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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

  • the winding mechanism is used with sewing machines of the type having a fixedly positioned winder shaft with a bobbinreceiving pin protruding from the machine casing, and a friction wheel for driving the winder shah and having a friction wheel shaft separated from the winder shaft but operatively connected with the winder shaft and engageable with the driving wheel of the machine to selectively operate the winding mechanism.
  • the inner end of the winder shaft has fixed thereto a disk with a slot extending diametrically thereof, and an end of the friction wheel shaft carries a cooperating disk having a pin or lug engageable in the slot.
  • the friction wheel is mounted on a carrier which is spring biased to an operating position and a rest position. The driving connection between the two shafts is maintained at all times within the range of displacement of the friction wheel shaft between the operating and rest positions.
  • Winding mechanisms with a fixedly positioned but axially displaceable winder shafts are known and do not have the above-mentioned disadvantages.
  • the bobbin-receiving journal protrudes from the sewing machine housing in its rest position, with the protrusion increased by the amount of the axial displacement.
  • a locking finger of the lever sensing the amount of wound thread moves over a lug of the winder shaft and thus keeps the shaft in the connected position.
  • the sensing lever grazes, during the winding process, constantly on the lug of the winder shaft, so that annoying noises are produced and those parts rubbing against each other are rapidly worn out.
  • the sensing lever bears against a flange of the thread bobbin to be wound, and thus keeps the winder shaft in its operating position.
  • This axial limitation of the winder shaft also causes annoying grazing noises and rapid wear of the parts rubbing against each other. Under unfavorable conditions, for example, with unilateral winding of the thread of the looper thread bobbin, the thread even can be clamped between the bobbin flange and the sensing lever hearing against the latter, and thus can be damaged.
  • the winding mechanism is characterized by the fact that the axis of the friction wheel shaft is displaceable laterally with respect to the axis of the fixedly positioned winder shaft, for starting and stopping the winding mechanism, and the driving connection between the two shafts is maintained at all times within the displacement range of the friction wheel axis necessary for movement between the operating position and the rest position.
  • the winding mechanism embodying the invention is very easy to operate, and fits harmoniously into the outer form or contour of the sewing machine casing, since the bobbinreceiving pin has to project from the casing only by the very small height of the sensing lever which is necessary in any case, and can be covered almost completely by this lever. Since no breakthroughs or openings are required in the sewing machine casing within the range of the winding mechanism, penetration of dust and fun or lint into the interior of the easing is effectively prevented. Another advantage is that the contact pressure of the friction wheel on the driving wheel cannot be influenced by the tension of the thread to be wound.
  • An object of the invention is to provide an improved releasable winding mechanism for sewing machines.
  • Another object of the invention is to provide such a releasable winding mechanism in which the esthetic appearance of the sewing machine casing is not impaired and all the parts are disposed within the casing.
  • a further object of the invention is to provide such a winding mechanism in which there are no uncovered openings in the sewing machine casing, thus preventing entry of dust and lint or the like into the casing.
  • FIG. 1 is a partial elevation view of a sewing machine with a winding mechanism, embodying the invention, built into the arm cover;
  • FIG. 2 is a partial top plan view of the sewing machine illustrating the arrangement of the winding mechanism and the course of the thread during winding;
  • FIG. 3 is a sectional view taken along the line I-[ of FIG. 2 and illustrating the winding mechanism in its operating position;
  • FIG. 4 is a view similar to FIG. 2 but illustrating the winding mechanism in its rest position
  • FIG. 5 is a sectional view taken along the line II-II of FIG. 2 illustrating the winding mechanism in its operating position
  • FIG. 6 is a top plan view of the winding mechanism with the arm cover partly cut away and the winder shaft removed.
  • a sewing machine is illustrated as having an arm 1 provided with an arm cover 2, and as being driven by known driving means, not shown, through a driving wheel 3.
  • Driving wheel 3 is operatively connected, in a known manner, with the arm (not shown) of the sewing machine, and can be released selectively from such connection, by means of a release screw 4, so that driving wheel 3 can rotate on the arm shaft without driving the latter.
  • the usual operating or control elements of the sewing machine are illustrated at 5, 6 and 7.
  • a winding mechanism 8, embodying the invention is arranged close to driving wheel 3, in arm cover 2. Thread 9 is unwound from a supply bobbin 11 arranged on a yarn roll holder 10, is conducted around a guide pin 12, which can also be designed as a thread pretensioning means, and is wound on looper thread bobbin 13.
  • Bobbin 13 is arranged on the slotted bobbin-receiving pin 14 of a winder shaft 15 protruding from arm cover 2.
  • Winder shaft 15 is freely rotatable in a hub 16 integral with arm cover 2, and is secured against axial displacement by a lug 17 and a locking ring 18.
  • Shaft 15 has a mounting portion 46 at its bottom end, on which there is nonrotatably mounted a driving disk 19 formed with a driving slot 20.
  • a friction wheel shaft 21 is freely rotatable on a hub 22 of a winder arm 23, and is secured against axial displacement by the hub 24 of a friction wheel 25, hub 24 being pressed on a mounting portion'49 at the bottom of friction wheel shaft 21.
  • Friction wheel 25 is vulcanized, in a known manner, on hub 24, or is secured thereon in any other way.
  • the top end of friction wheel shaft 21 has a mounting portion 46 on which there is non-rotatably secured a driving disk 27 provided with a driving pin 28 which engages slot of disk 19, thus establishing the driving connection between friction wheel shaft 21 and winder shaft 15.
  • Winder arm 23 is pivotally secured with a setscrew'29 on a bearing block 30 of cover 2, for pivoting in a horizontal plane about the axis of setscrew 29, and is biased by a helical tension spring 31 toward driving wheel 3.
  • the other end of spring 31 is secured on a depending bolt 43 screwed into cover 2.
  • a lever 32 which senses the amount of thread wound on looper thread bobbin 13, is pivotally secured by a setscrew 33 on release arm 34 for swinging about the axis of screw 33, and is guided in a slot 35 in arm cover 2.
  • Release arm 34 is pivotally secured, for swinging in a horizontal plane, by a setscrew 36 secured to arm cover 2, and its free end carriesa control pin 37.
  • a leafspring 40 is adjustably mounted on arm cover 2 through the medium of screws 38 and 39, and is formed with a striking ramp 41 and, in the rest position of winding mechanism 8, has its free end pressing against winder arm23. The force exerted by leafspring 40 is greater than the tension of helical spring 31, so that leafspring 40 holds winding mechanism 8 in its rest position and out of engagement with driving wheel 3.
  • leaf-v spring 40 In the operating position of winding mechanism 8, leaf-v spring 40 is pushed away from winder arm 23 by control pin 37 of release arm 34, so that spring 31 can pull winder arm 23, with friction wheel rotatably mounted therein, toward driving wheel 3, and thus establish the operating connection between driving wheel 3 and friction wheel 25.
  • Ramp 41 of spring 40 serves,'on the one hand, to push leafspring 40 away from winder arm 24 during the starting of winding mechanism 8 and, on the other hand, to release winding mechanism 8 by pushing control pin 37, secured on release arm 34, away when looper thread bobbin 13 is full.
  • Slot 42 in leafspring 40 permits an exact adjustment of the release moment of the winding mechanism, by loosening and then retightening the two screws 38 and 39.
  • Disks 27 and 19 preferably are made of plastic composition material, and are press fitted on the notched mounting portions 46 and 47 of winder shaft 15 and friction wheel shaft 21, respectively.
  • Winding mechanism 8 normally is in its rest position as illustrated in FIG. 4.
  • looper thread bobbin 13 is attached on bobbin-receiving pin 14 of mechanism 8.
  • the slotted bobbin-receiving pin 14 provides a non-rotational connection between winder shaft 15 and looper thread bobbin 13, since the lightly spread bobbin-receiving pin 14 is clamped firmly in bore 48 of looper thread bobbin 13.
  • the thread 9, to be wound, is now lead from supply hohbin 11 around guide pin 12 to bobbin 13, and wound by hand several turns clockwise around the latter.
  • sensing lever 32 is pushed along slot 35 of cover 2 against bobbin 13, and release arm 34 thus is turned about the axis of setscrew 38 toward winder shaft 13.
  • Control pin 37 strikes against ramp 41 of leafspring 40 and pushes spring 40 away from winder arm 23, so that winder arm 23 is turned, under the action of helical spring 31, about the axis of setscrew 20 serving as a pivot, and toward driving wheel 3 until friction wheel 25 bears against driving wheel 3.
  • control pin 37 strikes against a part of leafspring 40 extending substantially at a right angle to release arm 34.
  • Spring 40 now acts on control pin 37 of release arm 34 in a manner such that arm 34, with sensing lever 32 secured thereon and protruding between the flanges of looper thread bobbin 13, is secured by leafspring 40 against accidental displacement.
  • friction wheel shaft 21 rotates substantially concentrically with fixedly positioned winder shaft 15. Since driving disk 27 and driven disk 19 can be turned easily relatively to each other, the lateral displaceability of the axis of friction wheel shaft 21, relative to the axis of winder shaft 15,
  • driving wheel 3 can be disengaged from the work by means of release screw 4, or can remain engaged.
  • the winding of looper thread bobbin 13 is effected in a known manner.
  • leafspring 40 As soon as leafspring 40 is no longer held away from winder arm 23 by control pin 37, it again exerts its pressure on the winder arm and turns winder arm 23, against the tension of spring 31, about the axis of setscrew 29 which acts as a pivot and away from driving wheel 3 into the rest position, thus interrupting the winding process.
  • V I V I
  • winding mechanism as described can be modified.
  • driving pin 28 could engage a sufficiently large bore in disk 19 instead of a slot therein.
  • the transmission of the movement also could be effected by two driving cams engaging each other.
  • winder arm 23 and release arm 34 as rectilinearly moving slides instead of as pivotal levers.
  • the winding mechanism embodying the invention also could be arranged on any other part of the sewing machine, for example on the face of the sewing machine arm facing the operator.
  • a friction wheel driving the winder shaft, mounted on a friction wheel shaft separated from the winder shaft but operatively connected with the winder shaft, and a driving wheel, with the friction wheel being arranged-to be operatively connected to the driving wheel to operate the winding mechanism
  • the improvement comprising, in combination, means mounting said friction wheel shaft for displacement of its axis laterally, relative to the axis of said fixedly positioned winder shaft, between a winding mechanism operating position and a rest position; and connection means constantly maintaining the driving connection between said shafts throughout the range of displacement of said friction wheel shaft between said operating and rest positions.
  • a feeler protruding from the machine casing and engaging the thread mounted on a bobbin, said feeler being operable to shift said carrier from one spring bias to the other spring bias.
  • connection means comprises a pin extending outwardly from one of said shafts and eccentric thereto, and a slot extending diametrically of the adjacent end of the other shaft and having said pin engaged therein.
  • connection means comprises a pin extending outwardly from one end of one of said shafts and eccentric thereto, and an eccentric bore in the facing end of the other shaft having a diameter larger than that of said pin and having said pin engaged therein.
  • connection means comprises respective frontally rotating cams on said shafts and in engagement with each other.
  • connection means comprises plastic composition members.
  • said first spring comprises a leafspring having a free end engageable with said carrier for said friction wheel shaft, and having a ramp portion intermediate its ends; said feeler carrier having a pin at its free end engageable with said first spring and being moved by said feeler to a position in which said pin engages said ramp portion for biasing of said pin and said feeler carrier to said rest position, releasing said leafspring to engage said carrier for said friction wheel shaft.
  • said first spring comprises a leafspring having a free end engageable with said carrier for said friction wheel shaft, and having a ramp portion intermediate its ends; said feeler carrier having a pin at its free end engageable with said first spring and being moved by said feeler to a position in which said pin engages said ramp portion for biasing of said pin and said feeler carrier to said rest position, releasing said leafspring to engage said carrier for said friction wheel shaft.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US108517A 1970-02-06 1971-01-21 Releasable winding mechanism for sewing machines Expired - Lifetime US3670974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH178070A CH512621A (de) 1970-02-06 1970-02-06 Auslösbare Spulvorrichtung für Nähmaschinen

Publications (1)

Publication Number Publication Date
US3670974A true US3670974A (en) 1972-06-20

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ID=4218432

Family Applications (1)

Application Number Title Priority Date Filing Date
US108517A Expired - Lifetime US3670974A (en) 1970-02-06 1971-01-21 Releasable winding mechanism for sewing machines

Country Status (8)

Country Link
US (1) US3670974A (de)
AT (1) AT326988B (de)
CH (1) CH512621A (de)
DE (1) DE2101140A1 (de)
ES (1) ES388009A1 (de)
FR (1) FR2078167A5 (de)
GB (1) GB1343702A (de)
SE (1) SE364534B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096812A (en) * 1974-01-10 1978-06-27 Fritz Gegauf Aktiengesellschaft, Bernina-Nahmaschinenfabrik Clutching device for sewing machines
US4161153A (en) * 1976-11-18 1979-07-17 Aisin Seiki Kabushiki Kaisha Thread winding mechanism for sewing machine
US4646982A (en) * 1985-02-07 1987-03-03 F. Gegauf AG Bernina-Nahmaschinenfabrik Bobbin winding device for sewing machines
US5584257A (en) * 1993-08-31 1996-12-17 Juki Corporation Under thread supply apparatus
US20100147989A1 (en) * 2008-12-15 2010-06-17 Brother Kogyo Kabushiki Kaisha Thread winder and sewing machine provided therewith
CN101503847B (zh) * 2008-02-07 2012-11-07 杜尔克普-阿德勒股份公司 缝纫机和用于这种缝纫机的绕线装置
CN101608383B (zh) * 2008-06-20 2013-04-10 杜尔克普-阿德勒股份公司 缝纫机和用于这种缝纫机的绕线装置
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
EP0697280A1 (de) * 1994-06-24 1996-02-21 General Electric Company Wärmeformbare Schichtstoffstrukturen und Herstellungsverfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US935263A (en) * 1907-12-16 1909-09-28 Thomas G Plant Bobbin-winding machine.
US2148975A (en) * 1936-02-12 1939-02-28 Agren Ernst Malcus Flexible shaft coupling
US2836371A (en) * 1955-01-25 1958-05-27 White Sewing Machine Corp Bobbin winding mechanism
US2983455A (en) * 1958-09-05 1961-05-09 Singer Mfg Co Bobbin winder mechanism for sewing machines
US3581687A (en) * 1968-02-08 1971-06-01 Pfaff Ag G M Bobbin winding device for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US935263A (en) * 1907-12-16 1909-09-28 Thomas G Plant Bobbin-winding machine.
US2148975A (en) * 1936-02-12 1939-02-28 Agren Ernst Malcus Flexible shaft coupling
US2836371A (en) * 1955-01-25 1958-05-27 White Sewing Machine Corp Bobbin winding mechanism
US2983455A (en) * 1958-09-05 1961-05-09 Singer Mfg Co Bobbin winder mechanism for sewing machines
US3581687A (en) * 1968-02-08 1971-06-01 Pfaff Ag G M Bobbin winding device for sewing machines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096812A (en) * 1974-01-10 1978-06-27 Fritz Gegauf Aktiengesellschaft, Bernina-Nahmaschinenfabrik Clutching device for sewing machines
US4161153A (en) * 1976-11-18 1979-07-17 Aisin Seiki Kabushiki Kaisha Thread winding mechanism for sewing machine
US4646982A (en) * 1985-02-07 1987-03-03 F. Gegauf AG Bernina-Nahmaschinenfabrik Bobbin winding device for sewing machines
US5584257A (en) * 1993-08-31 1996-12-17 Juki Corporation Under thread supply apparatus
CN1080346C (zh) * 1993-08-31 2002-03-06 重机公司 向缝纫机供给下线的方法
CN101503847B (zh) * 2008-02-07 2012-11-07 杜尔克普-阿德勒股份公司 缝纫机和用于这种缝纫机的绕线装置
CN101608383B (zh) * 2008-06-20 2013-04-10 杜尔克普-阿德勒股份公司 缝纫机和用于这种缝纫机的绕线装置
US20100147989A1 (en) * 2008-12-15 2010-06-17 Brother Kogyo Kabushiki Kaisha Thread winder and sewing machine provided therewith
US8074589B2 (en) * 2008-12-15 2011-12-13 Brother Kogyo Kabushiki Kaisha Thread winder and sewing machine provided therewith
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

Also Published As

Publication number Publication date
ES388009A1 (es) 1973-05-01
ATA16271A (de) 1975-03-15
FR2078167A5 (de) 1971-11-05
AT326988B (de) 1976-01-12
SE364534B (de) 1974-02-25
CH512621A (de) 1971-09-15
DE2101140A1 (de) 1971-08-19
GB1343702A (en) 1974-01-16

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