US1502048A - Thread-tensioning means for sewing machines - Google Patents

Thread-tensioning means for sewing machines Download PDF

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Publication number
US1502048A
US1502048A US443932A US44393221A US1502048A US 1502048 A US1502048 A US 1502048A US 443932 A US443932 A US 443932A US 44393221 A US44393221 A US 44393221A US 1502048 A US1502048 A US 1502048A
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US
United States
Prior art keywords
thread
tension
threads
plate
tensioning means
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
US443932A
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English (en)
Inventor
Arthur A Merritt
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.)
Willcox and Gibbs Sewing Machine Co
Original Assignee
Willcox and Gibbs Sewing Machine 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 Willcox and Gibbs Sewing Machine Co filed Critical Willcox and Gibbs Sewing Machine Co
Priority to US443932A priority Critical patent/US1502048A/en
Priority to GB1148/22A priority patent/GB185062A/en
Priority to FR546285D priority patent/FR546285A/fr
Priority to DE1922W0060411 priority patent/DE389260C/de
Application granted granted Critical
Publication of US1502048A publication Critical patent/US1502048A/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

  • This invention relates to thread-tensioning means for sewing machines.
  • One object is the provision of practicable and efficient adjustable thread-tensioning means whereby any desired tension may be imposed upon the thread according to conditions encountered.
  • a further object is the provision of thread-tensioning means for a plurality of threads adapted to be'simultaneously thrown into and out of operation as to all of said threads collectively and adjustable to individually determine the tension for each thread irrespective of the tension for other threads.
  • a further object is the provision of such means in which *the collective releasing and applying of the tension upon the plurality of threads does not disturb the individual. tension adjustment for each thread.
  • Adjustment A of the tension for the four needle threads in that structure is effected by adjustment of the tension of the single spring common to the four sets of disks for the four needle threads. That is, there is a tension adjustis now believed to be the preferredembodi ment thereof illustrated in the accompanying drawing, wherein Fig. 1 is a front elevation with the .ma chine casing or frame in section;
  • Fig. 2 is a vertical transverse section. through the thread-tensioning means shown in Fig. 1;
  • Fig. 3 is a front elevation thread-tensioning means
  • Fig. 4 is a sectional view on line lt of F ig. 2'.
  • Fig. 5 is a detail view of one of the parts.
  • FIG. 1 there is shown at 10a fragment of the top wall of the hollow bridge of the frame of a sewing machine such. as shown in the aforesaidPatent 1,041,652, and simi larly at 11 there is shown a fragment of the wall ofa hollow standard at one end ofsaid machine frame.
  • a bracket or frame upon which the .threadtensioning 'means are mounted, aspresently described, comprises a basesection or plate 12, an upright section or wall 13, and an end-plate or wall 14. Said base 12 seats against the top of wall 10 and is secured thereto by screws .15, while end-plate 1 1 fits overand closes. an opening in wall 11, as shown in Fig. 1.
  • a horizontally disposed bar 16 is longitudinally movable in a bearing opening through base-plate 12 and .at its left hand end car-. ries an upright arm 17 connected at. its upper end to the end of a rod 18 longitudinally movable in a horizontal bearing opening extending the entire lengthof upright.
  • Wall .14 A springlQ earl-Winding rlt of parts of the bears atone end against plate 14 and atits other end against the hub of arm 17 around bar 16, the spring thus tending to move said bar, its arm 17 and rod 18, to the left in Fig. 1, such movement being limited by a stop in 20 through bar 16 adapted to contact the end of base-plate 12.
  • '21 is an upstanding swinging arm automatically actuated by the lifting and lowering of the presserefootfortmanipulation of the work under the latter.
  • the beveled surface at the tuaper end ofarm 21 actuates the end of bar 16 to rmove the same and rod 1Stoward the right in Fig. 1 against the tension of spring 19 when the presserfoot is liftedbyits lifting -mea-ns.
  • the upright wall 13 is recessed .at'22, said recess intercepting the bearingopening for rodl8'andiexposing that portion of said rod which traverses said. recess, as clearly shown.
  • Apresser-plate or anvil 23 has an upstanding extension positioned between ,twolugs 241, 24 .on plate 13 at opposite edgesrespectively of the recess 22.
  • a pivot pin 25 through-the lugs 24 and the .eXtensiono'f presser-plate or anvil 23, hinges the latter tothe bracket or frame of the thread-tensioning means.
  • a lug26 on the underside of presser-plate .23 projects intorecess 22 of wall 13 and contacts one or the other of two flattened surfaces 27.28 of rod 18, said surfaces being at different elevations with respect to each other and. the axis of the rod with an interveningflattened inclined surface 29.
  • Thestructure as illustrated is adapted to accommodate the threads, the .four needle threads a, Z), 0 and (Z, and cross thread 6.
  • five flat or blade springs 30 are shown, each adapted at its free end to ;.press one .of thethreads against the presserrplate 23 in tensioning said thread. Since these springs and the associated supporting :and adjusting means foreach spring areall alike, a description-as to one will suffice forall.
  • spring 30 is bent nearits middle forming it into two approximately parallel offset-sections, .the lower of said section at-the free end of the spring bearingagainst presserplatel23 and being slightly upturned .at its free extremity.
  • 36 are thread guiding hooks, one for each of the five threads, of a construction more fully described in patent-to me No. 1,0411,65'6, dated Oct. 15, 1912.
  • 37 is a wire spring secured at one'en'd by a set screw 38 to the anglearm 32 at the extreme left, and at its free end positioned to bear against the four needle threads for the purpose descrieed in Osterhout Patentllo. 1,134,482 dated Apr. 6, 1915, with reference to-the similar spring 40 of said patent.
  • each thread for example thread (1., passes from a source of supply through its corresponding thread guide at, thence between its spring-3O and the presserplate23 and throughits hoolr3l3and under spring 37.
  • any-spring upon its thread may be adjusted'by adjustment of the corresponding screws whereby the-threads maybe sinii larly or differently tensioned as desired.
  • thread-tensioning means for sewing machines, the combination of a pivotally supported presser plate or anvil member, a plurality of tension springs for separately pressing threads against said plate to tension said threads, adjusting means for separately determining the degree of pressure to be exerted by each spring upon its thread, and means operable to swing saidpresser plate on its pivot out of and into active position with relation to the tension springs to simultaneously release or impose tension upon all of the threads.
  • thread-tensioning means for sewing machines, the combination of a pivotally mounted presser plate or anvil member, a plurality of tension members for separately pressing threads against said plate to tension the threads, and means operable to move said plate on its pivot into and out of active position with relation to said tension members collectively to thereby apply or release tension upon all of the threads together.
  • thread-tensioning means for sewing" machines or the like, the combination of a presser plate or anvil member depending from a pivot having an approximately horizontal axis and over the surface of which plate a plurality of threads are adapted to pass, a plurality of tension members for separately pressing said threads against said plate to tension the threads, adjusting means for separately determining the degree of pressure to be exerted by each member upon its thread, and means operable to swing said plate on its pivot into and out of active position with relation to said tension members and thereby apply or release tension upon all of said threads together.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US443932A 1921-02-10 1921-02-10 Thread-tensioning means for sewing machines Expired - Lifetime US1502048A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US443932A US1502048A (en) 1921-02-10 1921-02-10 Thread-tensioning means for sewing machines
GB1148/22A GB185062A (en) 1921-02-10 1922-01-13 Improvements in thread-tensioning devices for sewing machines
FR546285D FR546285A (fr) 1921-02-10 1922-01-24 Dispositif tendeur de fils pour machines à coudre
DE1922W0060411 DE389260C (de) 1921-02-10 1922-02-04 Fadenspannvorrichtung fuer mehrere Faeden an Naehmaschinen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US443932A US1502048A (en) 1921-02-10 1921-02-10 Thread-tensioning means for sewing machines
GB1148/22A GB185062A (en) 1921-02-10 1922-01-13 Improvements in thread-tensioning devices for sewing machines

Publications (1)

Publication Number Publication Date
US1502048A true US1502048A (en) 1924-07-22

Family

ID=26236521

Family Applications (1)

Application Number Title Priority Date Filing Date
US443932A Expired - Lifetime US1502048A (en) 1921-02-10 1921-02-10 Thread-tensioning means for sewing machines

Country Status (4)

Country Link
US (1) US1502048A (fr)
DE (1) DE389260C (fr)
FR (1) FR546285A (fr)
GB (1) GB185062A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213815A (en) * 1962-11-30 1965-10-26 Russmann Karl Spool holder arrangement for sewing machines
US4018175A (en) * 1975-11-17 1977-04-19 Louisville Bedding Company Thread-tensioning mechanism for the stop motion means of a multi-needle sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213815A (en) * 1962-11-30 1965-10-26 Russmann Karl Spool holder arrangement for sewing machines
US4018175A (en) * 1975-11-17 1977-04-19 Louisville Bedding Company Thread-tensioning mechanism for the stop motion means of a multi-needle sewing machine

Also Published As

Publication number Publication date
FR546285A (fr) 1922-11-04
DE389260C (de) 1924-01-29
GB185062A (en) 1922-08-31

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