US2965058A - Thread tension device for sewing machines - Google Patents

Thread tension device for sewing machines Download PDF

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Publication number
US2965058A
US2965058A US761839A US76183958A US2965058A US 2965058 A US2965058 A US 2965058A US 761839 A US761839 A US 761839A US 76183958 A US76183958 A US 76183958A US 2965058 A US2965058 A US 2965058A
Authority
US
United States
Prior art keywords
arbor
tension
adjusting nut
discs
head
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
US761839A
Other languages
English (en)
Inventor
Edward J Herbst
Philip W Dulk
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.)
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Priority to US761839A priority Critical patent/US2965058A/en
Priority to GB27979/59A priority patent/GB868918A/en
Priority to DES31645U priority patent/DE1800571U/de
Priority to CH7782959A priority patent/CH376757A/de
Priority to FR804728A priority patent/FR1234700A/fr
Application granted granted Critical
Publication of US2965058A publication Critical patent/US2965058A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers

Definitions

  • the present invention relates to thread tension devices for sewing machines and has for a primary object to provide a thread tension device that is substantially disposed within the confines of the frame, is simple to adjust and to release, and is economical, dependable, and durable.
  • Fig. l is a vertical sectional view transversely of the head of a sewing machine having a tension device in accordance with this invention.
  • Fig. 2 is a fragmentary front view, partly broken away and in section, of the sewing machine of Fig. 1.
  • Fig. 3 is a horizontal sectional view taken substantially on the line 3-3 of Fig. 1.
  • the present invention is illustrated in the drawings as embodied in a sewing machine having a frame including a head 1 having a front face 1a.
  • the open top of the head 1 is closed in the usual manner by a removable cover plate 2.
  • the tension device is mounted in the front upper portion of the head 1 and comprises an arbor 3 mounted in an upstanding lug 4 carried by a transverse partition 4a in the top of the head 1.
  • the arbor 3- is secured in the lug 4 by means of a set screw 5 threaded through the lug into locking engagement with the periphery of the arbor and including a stud 6 at the leading end thereof that extends into an endwise slot 7 in the arbor 3 to insure against turning of the arbor 3.
  • the arbor 3 has an externally threaded portion 8 intermediate its ends and an enlarged head 9 at the free end thereof outwardly of the front face 1a of the head. Threaded on the portion 8 is an adjusting nut 10 which is relatively large in diameter and has the upper portion of the periphery thereof exposed throu-gh an opening 11 in the cover plate 2. rI'he threads on the arbor 3 are multiple and have a fast lead to provide a complete range of adjustment of the tension in one revolution of the adjusting nut 10.
  • an anchor disc 12 having a diameter bar 13 extending through the slot 7 of the arbor 3 to secure the disc against turning on the arbor 3 while permitting movement endwise of the arbor, and having a laterally extendingarrn ⁇ 14 cooperating with a lug 15 on the inside of a sleeve portion 16 of an adjusting disc 17.
  • the disc 17 is.- rnounted on. the ,adjustingy nutjl() for angular ⁇ adjustment relatively'thereto and, is1
  • a pair of opposed dish-shaped tension discs 20 between which a thread lead is adapted to run for placing a tension thereon.
  • a cup-shaped tension release element 21 Inwardly of the tension discs 20, there is mounted upon the arbor 3 a cup-shaped tension release element 21 having a bottom wall 22 and a cylindrical side wall 23.
  • a beehive spring 24 is mounted on the arbor within the plurality tension release element 21. At its inner end the spring 24 reacts against the adjusting nut Y10 through the anchor disc 12 and adjusting disc 17 and at its outer end bears against the bottom wall 22 of the tension release element which in turn bears against the tension discs 20 and the head 9, thereby developing pressure between the thread engaging faces of the tension discs.
  • the bottom wall 22 of the tension release element 21 has a diameter bar 25 disposed in the slot 7 of the arbor 3 for restraining the same against turning on the arbor 3 while permitting movement endwise of the arbor.
  • the side wall 23 of the tension release element 21 telescopically receives the sleeve portion 16 -of the adjusting disc 17 to provide a continuous cover for the spring 24.
  • connection l I comprising a pin 18 on the adjusting""nut 10 that is extending ange 26 on the free edge of the side wall 23.
  • a tension release lever 27 is pivoted intermediate its ends on -the frame of the machine by a pivot screw 28 arranged on an axis perpendicular to the arbor 3.
  • the upper end of the lever 27 is bifurcated to provide a pair of lever arms 29 that straddle ⁇ the side wall 23 of the tension release element.
  • the opposite end of the lever 27 comprises a lever arm 30 that is biased clockwise by a spring 31 to move the arms 29 to the inoperative position.
  • That portion of the aperture 11 in the cover plate 2 in front of the adjusting nut 10 is substantially closed by the sleeve portion 16 of the adjusting discs 17 and the tension release element 21.
  • a closure plate 35 loosely mounted on the arbor 3 and having a ange 36.
  • the plate 35 has a tail 37 underlying the lug 4 for preventing turning thereof.
  • Rotation of the adjusting nut ⁇ 1l) is .limited to one revolution by cooperation of the lug 1S on the adjusting disc 1'7 wit-h the anchor disc 12.
  • the adjusting disc 17 is moved away from the adjusting nut to withdraw the pin 18 from the hole 19 in which it is seated .and the adjusting nut 10 and the adjusting disc v1 7 are then relatively adjusted angu larly after which .the fdisc 17 is .released to seat the pin 18 in the adjacent-one of the holes 19.
  • a thread tension device comprising an'arbor mounted in said frame and having an externally threaded portion intermediate its ends andan enlarged head at the freeend thereof, an adjusting nut threaded on the externally ⁇ threaded portion of saidThatbor for movement endwise of said arbor upon turning of said adjusting nut, opposed ⁇ tension discs mounted on said arbor between said adjusting nut and said head, a resilient element mounted on said arbor between said adjustingnut and Vsaid tension discs and reacting against said adjusting nut to bias said tension discs against said head, a cup-shaped tension release element having a bottom wall and a cylindrical side wall,
  • said tension release element being mounted on said-arbor with said bottom wall disposed between'said resilient element and said tension discs and said'side wall surrounding said resilient element; a laterally extending flange lon said side wall, a lever pivotally mounted in lsaid frame and having a bifurcated 'end straddling said side wall and adapted to cooperate with rsaidtiange to move 'said tension release element endwise of said arbor upon Aactuation 'of said lever thereby to compress said resilient element ⁇ and release the bias on 'said tension discs.
  • a thread tension ⁇ device comprising an arbor mounted in said frame and having an externally threaded portion 'intermediate its ends and an enlarged head at the Afree end thereof, an adjusting nut threaded on the externally threaded portion of said arbor for movement endwise of said arbor upon turning of said adjusting nut, opposed tension discs mounted on said arbor between said adjusting -nut and said lhead, a resilient element mounted on said arbor between said adjusting nut and said tension discs and reacting against said adjusting nut to bias said tension discs against said head, a cup-shaped tension release element having a bottom wall and a cylindrical side wall, said tension release element being mounted on said arbor with said bottom wall disposed between said resilient element and said tension discs landsaid side wall 'surrounding said resilient element, an adjusting disc mounted on rsaid arb'or between said 'resilient element and said adjusting nut, means for 'adjustably securing said
  • a thread tension device comprising an arbor mounted in said frame and having an externally threaded portion intermediate its ends and an enlarged'head at the free end thereof, an adjusting nut threaded on .the externally threadedportion of said a-rbor for movement endwise of said arbor upon turning of said adjusting nut, opposed tension discs mounted on said arbor V'between said adjusting nut and said head, aresilient element mounted on said arbor between said adjusting nut and said tension discs and reacting againstsaidadjustingfnut .to bias said tension discs against said head, a tension release element disposed between said resilient element and said tension discs, and a lever for moving said tension element endwise of said arbor to compress said resilient element and thereby release the bias on said tension discs, said frame having an open upper portion and a cover plate closing the same and having an opening, said tension-device being mounted in said frame adjacent to said cover plate with a portion of the periphery of said adjusting nut exposed through said opening, said opening
  • a thread tension device 'comprising an arbor mounted in said frame and having an externally threaded vportion intermediate its ends and an -enlarged head at the free end thereof, an adjusting nut fthreaded on the externally threaded portion-of said rarbor'for lmovement endwise of said arbor upon turning of said adjusting nut, opposed tension discs mounted on said arbor between said adjusting nut and said head, ya resilient element mounted on vsaid arbor between said adjusting nut and said tension discs and reacting againstsaid adjusting nut to bias ysaid tension discs against said head, a tension release element disposed between said resilient element and said tension discs, and a lever for moving'said tension release element endwise of said arbor to compress said resilient element and thereby release the bias on said tension discs, said frame having an open upper portion vand a cover plate closing the same and 'having .an opening, said tension device being :mountedinsaid frame adjacent to said cover plate with
  • a thread tension device comprising a horizontally disposed 'arbor carried by 'said lug and having a free end extending outwardly of said bracket arm beyond the front face thereof, said vbracket arm having lan opening on the front wall thereof ⁇ through which-said arbor extends, opposed tension discs mounted upon the free yend ofrsaid arbor outwardly of the front wall of the bracket arm, spring means mounted ⁇ upon said arbor ⁇ inwardly Yof saidtension discs, said spring means'bein'g .disposedsubstantially inwardly of the front wall of the Ybratiket arm and acting through said opening to bias said tension 'discs into .thread tensioning engagement

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US761839A 1958-09-18 1958-09-18 Thread tension device for sewing machines Expired - Lifetime US2965058A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US761839A US2965058A (en) 1958-09-18 1958-09-18 Thread tension device for sewing machines
GB27979/59A GB868918A (en) 1958-09-18 1959-08-17 Sewing machine with thread tension device
DES31645U DE1800571U (de) 1958-09-18 1959-08-28 Naehmaschine mit fadenspanneinrichtung.
CH7782959A CH376757A (de) 1958-09-18 1959-09-04 Nähmaschine mit Fadenspanneinrichtung
FR804728A FR1234700A (fr) 1958-09-18 1959-09-09 Machine à coudre comportant un dispositif tendeur de fil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US761839A US2965058A (en) 1958-09-18 1958-09-18 Thread tension device for sewing machines

Publications (1)

Publication Number Publication Date
US2965058A true US2965058A (en) 1960-12-20

Family

ID=25063385

Family Applications (1)

Application Number Title Priority Date Filing Date
US761839A Expired - Lifetime US2965058A (en) 1958-09-18 1958-09-18 Thread tension device for sewing machines

Country Status (5)

Country Link
US (1) US2965058A (de)
CH (1) CH376757A (de)
DE (1) DE1800571U (de)
FR (1) FR1234700A (de)
GB (1) GB868918A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667414A (en) * 1970-09-25 1972-06-06 Singer Co Thread tensioning device for sewing machines
US4192357A (en) * 1976-12-27 1980-03-11 Nissan Motor Company, Limited Weft yarn grasping apparatus for fluid jet loom
US4545311A (en) * 1984-08-02 1985-10-08 The Singer Company Thread tensioning device for a sewing machine
US5752396A (en) * 1995-10-14 1998-05-19 H. Stoll Gmbh & Co. Thread control device for flat knitting machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US756314A (en) * 1900-06-09 1904-04-05 Edwin J Toof Tension and thread controlling mechanism for sewing-machines.
US2298767A (en) * 1940-06-03 1942-10-13 Union Special Machine Co Closure hinge means
US2609772A (en) * 1948-12-20 1952-09-09 Mefina Sa Sewing machine
US2701694A (en) * 1952-03-20 1955-02-08 White Sewing Machine Corp Thread tension device for sewing machines
US2843336A (en) * 1955-10-05 1958-07-15 Singer Mfg Co Thread tension device for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US756314A (en) * 1900-06-09 1904-04-05 Edwin J Toof Tension and thread controlling mechanism for sewing-machines.
US2298767A (en) * 1940-06-03 1942-10-13 Union Special Machine Co Closure hinge means
US2609772A (en) * 1948-12-20 1952-09-09 Mefina Sa Sewing machine
US2701694A (en) * 1952-03-20 1955-02-08 White Sewing Machine Corp Thread tension device for sewing machines
US2843336A (en) * 1955-10-05 1958-07-15 Singer Mfg Co Thread tension device for sewing machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667414A (en) * 1970-09-25 1972-06-06 Singer Co Thread tensioning device for sewing machines
US4192357A (en) * 1976-12-27 1980-03-11 Nissan Motor Company, Limited Weft yarn grasping apparatus for fluid jet loom
US4545311A (en) * 1984-08-02 1985-10-08 The Singer Company Thread tensioning device for a sewing machine
US5752396A (en) * 1995-10-14 1998-05-19 H. Stoll Gmbh & Co. Thread control device for flat knitting machine

Also Published As

Publication number Publication date
GB868918A (en) 1961-05-25
FR1234700A (fr) 1960-10-19
CH376757A (de) 1964-04-15
DE1800571U (de) 1959-11-19

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