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US1929321A - Chain stitch sewing machine - Google Patents

Chain stitch sewing machine Download PDF

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Publication number
US1929321A
US1929321A US558584A US55858431A US1929321A US 1929321 A US1929321 A US 1929321A US 558584 A US558584 A US 558584A US 55858431 A US55858431 A US 55858431A US 1929321 A US1929321 A US 1929321A
Authority
US
United States
Prior art keywords
needle
looper
thread
loop
thread loop
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
US558584A
Other languages
English (en)
Inventor
Lutz Friedrich
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.)
Union Special GmbH
Original Assignee
Union Special GmbH
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 Union Special GmbH filed Critical Union Special GmbH
Application granted granted Critical
Publication of US1929321A publication Critical patent/US1929321A/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
    • D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
    • D05B1/02—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making single-thread seams
    • D05B1/06—Single chain-stitch seams
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/02—Loop takers, e.g. loopers for chain-stitch sewing machines, e.g. oscillating

Definitions

  • the invention relates to new and useful 1m provements in sewingmachines, andm'oreparticularly to a sewing machine for forming single I chain stitches.
  • An object of the invention isto provide a machine of the above character h'aving'a' non-thread carrying looper moving into and out of, the needle thread loops to aid in enchaining the needle thread loops; wherein said looperw is so operated, --as to positively place the needle thread loop aboutthe needle, independent of any action of thefeed of the material, sothat the material may be fed in any direction during stitching;
  • a further object of the invention is to provide a sewing machine of the above type wherein the looperis oscillated for movement into and out of the needle thread loop,'and is given a bodily rotation about the axis of the needle for posi-;
  • a further object of the invention is' to provide a machine of the above type with means for, reciprocating the needle and giving a dwell thereto while the'looper is rotated for the placing of the needle thread loop carried .by the looper around theneedle.
  • Fig.2 is a view partly in plan and. partly in.
  • Fig. 3 is a detail in horizontal section at the end of; the work arm and showing the mounting the'looper attherear end of its stroke and the needle at the lower end of its reciprocation;
  • Fig. 7 is a view showing the looper moved forward to enter the needle thread loop and the, needle "partly retracted. "The looperis also' shown in' broken lines all the way to the forward end of its stroke. H l
  • Fig. 3 is a view showingtheneedle above the fabric and thelooper' as having been rotated-f bodily through an'arc of 180' degrees; 0'
  • Fig. 9- is a view'similar to Fig. 8, but showing. the looper as having rotated through an arc of a 360 degrees;
  • Fig-:10 is aview similar to Fig. 9, omitting the enchained'thread loops and the twist "in thenee- 6 5' dle thread loop, and also: theneedle thread as it passes throughthe needle for the sakeoi cl'ear-. ness, and. witlrthe needle moved downward sothat its 'point'is just below the upper edge of t looper;
  • H J i 'Figxll is'a view similar to Fig; 10, but showing the looper as'having turned'or rotated-in areverse direction from1its first rotation through an arc of 180 degrees;
  • Fig. 12 is a view similar to Fig. 11; but showing the looper as having rotated in a reverse direction through 360 degrees, and as having returned to its normal position for oscillation
  • the invention is directed to asewing machine mechanism; includes a needle and a non-thread carrying looperi which cooperates therewith in forming the single thread'chain stitches.
  • the machine includes a reciprocating needle and a non-'threadcarrying looper which is mounted foroscillation and also for rotation. The looper is moved into the needle;
  • the needle is reciprocated by a needle lever which in turn is actuated by a rotating cam.
  • the looper is rotated by a segment gear which in turn is reciprocated by an actuating lever oscillated by a rotating cam.
  • the machine includes a standard 1 carrying a work supporting arm 2, which as shown, is of the general cylindrical type. Carried by the standard 1 is an overhanging arm 3 carrying a needle head 4. Mounted for reciprocation in the needle head is a needle bar 5 carrying a needle 6. The needle lever 7 pivoted at 8 is connected by a link 9 to the needle bar for reciprocating the same. This lever 7 carries a roll-' er 10 which runs in a cam. groove formed in a disk 11 carried by the main shaft 12. . This shaft 12 is mounted in suitable bearings in the standard 1.
  • the fabric to be stitched is supported on the work supporting member or throat plate 13 and is held thereon by a presser foot '14 carried by a presser bar 15.
  • This presser bar is mounted in the needle head and is yieldingly urged against the work support by any suitable means.
  • Mounted on the presser bar is .a collar 16 carrying a forked arm 17 which straddles the needle bar 5.
  • a collar l8carrying a lug to which the link 9 is attached, on the upward movements of the needle bar engages the forked arm 17 and raises the presser foot from the material.
  • This looper 19 is in the form of a pointed blade, the under face of which is substantially straight, and the upper face of which is curved,
  • the looper is carried by a shank 20 mounted in a carrier 21 and secured therein by a set screw 22.
  • the carrier 21 is attached to a shaft 23 passing through lugs 24, 24 formed as a part of a support 25.
  • the looper is free to oscillate on this support. 1
  • Said looper is oscillated by means of a rod 26 which is connected toa lever 27 at 28.
  • the lever 27 is mounted on a cross shaft 29 for free movement thereon, and carries a roll-. er 30 at its upper.
  • the rod 26 carries ahead 33 which engages a ball 34 in the shank 20 of the looper. This isfor the purpose of permitting the leoper to rotate in the head.
  • the rod 26 has a threaded engagement with the head '33 andalso with the part connected to the lever 27, and these threads are right and left-hand threads, so that by turning therod, theworking position ofthe looper maybe varied
  • the rod 26 is guided in its endwise movements by a guide plate 35 secured byscrews 86, 36to a vertical web carried by the Work arm 2.
  • Therod passes through an opening in this vertical web and This-preventsany sidewise or lateral movements of. the rod.
  • the support 25 for the looper is cone-shaped on its under face and is mounted in a coneshaped bearingin the work arm.
  • a shaft 37 is attached to this support 25 and carries a sleeve having a cone 38 at its lower end mounted in a below the upper edge-of the looper.
  • This sleeve is keyed to the shaft so that when the sleeve is rotated it will. rotate the support 25.
  • the sleeve is provided with a gear 40 which meshes with a gear 41 on a sleeve 42.
  • the sleeve 42 carries a second gear or pinion 43 which meshes with a segment rack 44 carriedby an arm 45 attached to a shaft 46.
  • the shaft 46 is mounted in suitable bearings in the work arm and in the plate 39. This shaft 46 carries an arm 47 which is attached to a rod 48.
  • the rod 48 is in turn attached to a lever 49 mounted freely in the cross shaft 29, and the lever 49 at its upper end carries a roller running in a cam groove in a disk- 50 on thejactuating shaft 12.
  • this segment gear 44 is oscillated, it will impart throughthe gear with which it meshes, and the connecting gears operated thereby, a rotation to the support 25.
  • the cams for reciprocating the looper and for rotating the same are so timed that the looper moves forward into the needle thread loopto the forward end of its stroke, after which thefllooper is rotated through an arc of 360 degrees, and then it is returned by a reverse rotation through an arc of 360 degrees, after which the looper is retracted from the needle thread loop.
  • the looper moves, alongside of the needle in order to enter the needle thread, loop, and therefore, during its rotation, it ,will' be caused to move bodily around a vertical line con taining the path of reciprocation of the needle.
  • This path of reciprocation 'of the needle is sub-i stantially in alinement with the axis of rotation of the support 25.
  • a chamber in whichis placed the segment rack, and the pinions or gears for rotating the looper.
  • This chamber is substantially-closed, and will serve as a lubricating well or chamber for the parts disposed therein.
  • the needle has continu'edits downwardrhovement, while the looperremai'nediatrest in the position shown in The needle has thus passed down laid about the needle by this reverse rotation of the looper. needle thread loop, then thelooper is retracted by its rearward oscillation from the needle thread loop,.and the stitch has been completed.
  • a thread carrying looper cooperating with the needle to form singlethreadchain stitches means for reciprocating the needle and giving. a dwell thereto when the point of the needle is just below i for re- *ciprocating the same, a looper, means for, oscilthe looper in one direction'bodilyabout"an axis'in' line with the needle while theneedle ison itsup direction while the'needle is'at a dwell for posi-'- 1 tively placing theyneedlethread 'loop on they I work support, a presser j I footgia presser.bar carrying the presser foot, 9.;
  • axis .containingithe needle including a support on which said looper is' pivotally mounted, agear for rotating 'saidsupport, an oscillating segment meshing with said gear, means for oscillating said segment, said means for oscillating the segment giving a dwell to the rotation of the looper while the looper 'is being oscillated into and out of the needle thread loop, said means for I oscillating the looper-including ball on vthe shank'of the looper, and a rod having aheadengaging the ball whereby the looper may, be osciltheirod;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US558584A 1930-09-09 1931-08-21 Chain stitch sewing machine Expired - Lifetime US1929321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE545743T 1930-09-09

Publications (1)

Publication Number Publication Date
US1929321A true US1929321A (en) 1933-10-03

Family

ID=34427976

Family Applications (1)

Application Number Title Priority Date Filing Date
US558584A Expired - Lifetime US1929321A (en) 1930-09-09 1931-08-21 Chain stitch sewing machine

Country Status (4)

Country Link
US (1) US1929321A (fr)
DE (1) DE545743C (fr)
FR (1) FR721632A (fr)
GB (1) GB366433A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6647907B1 (en) * 2002-05-22 2003-11-18 George Long Chain stitch machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6647907B1 (en) * 2002-05-22 2003-11-18 George Long Chain stitch machine

Also Published As

Publication number Publication date
GB366433A (en) 1932-02-04
DE545743C (de) 1932-03-08
FR721632A (fr) 1932-03-05

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