US2741199A - Loop-taker mechanism for sewing machines - Google Patents

Loop-taker mechanism for sewing machines Download PDF

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Publication number
US2741199A
US2741199A US372895A US37289553A US2741199A US 2741199 A US2741199 A US 2741199A US 372895 A US372895 A US 372895A US 37289553 A US37289553 A US 37289553A US 2741199 A US2741199 A US 2741199A
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United States
Prior art keywords
driver
loop
taker
spring
recess
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
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US372895A
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English (en)
Inventor
Siebrasse Wilhelm
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.)
Anker Werke AG
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Anker Werke AG
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
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Application granted granted Critical
Publication of US2741199A publication Critical patent/US2741199A/en
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks

Definitions

  • 1 provide the stitch-forming mechanism with resilient means that during the reciprocating motion of the driver not only dampen the impacts between driver and loop taker but also yieldingly receive the resulting blow-like pendulous movements of the bobbin-case horn.
  • Fig. l is an am'al view of the driver of a stitch-forming mechanism according to the invention
  • Fig. 2 shows one end of the driver in section and on a larger scale
  • Pig. 3 is a top view of the same end of the driver
  • Fig. 4 is an axial view of a modified driver
  • Fig. 5 shows separately one end of the driver on a larger scale
  • Fig. 6 is a top view of the same end;
  • Fig. 7 is an axial view of the loop-taker guide ring to be used with a driver according to Figs. 1 to 3 or Figs. 4 to 6, and Fig. 8 shows part of the same ring on a larger scale;
  • Fig. 9 is an axial view of the entire stitch-forming mechanism including a driver according to Figs. 1 to 3 and a guide ring according to Figs. 7 and 8;
  • Figs. 10 and 11 are a side view and front view respectiveiy of the loop taker, while Figs. 12 and 13 are respective front and side views of the bobbin case pertaining to the mechanism of Fig. 9.
  • the driver 1 shown in Figs. 1 to 3 and 9 has each of its two ends 2 bifurcated by a recess 3.
  • a bore 4 extends from the bottom of the recess inwardly and receives the two straight ends 5 of a coiled spring 6 which has several turns located in the recess and projecting away ited States Patent from the end of the driver.
  • the spring 6 is additionally fastened by means of a cross pin 7.
  • the coiled spring 6 is disposed on a step formed by a recess 8 and is secured to the end 2 of the driver 1 by means of a fastening screw 9.
  • the loop-taker guide ring it has a substantially circular central opening it which, in the assembled mechanism, is concentric to the axis of driver and bobbin.
  • the opening 11 has a recess 12 which extends outwardly from the axis and receives the end of the born 13 of the bobbin case :14 (Fig. 9).
  • the end of horn 13 is straddled by a U-shaped portion of a leaf spring 15.
  • Spring 15 has both ends secured to guide ring it ⁇ by respective fastening screws
  • the heads of screws 16 are inserted into cavities of the ring, and the ends of spring 15 areinserted .into grooves 17 of the guide ring (Fig. 8). Consequently, the spring 1 and the screws in are sunken into the body f the guide ring and do not axially project therefrom.
  • the driver 1 has its central axis coaxial with the guide ring 3% and the springs s of the driver are engageable with res ective abutment faces of the loop taker 18 (Figs. 9, 10, ll) which is guided in ring it? for rotational movement about its central bearing shaft 19.
  • the driver 1 has an ofi-set central hub portion connected with the usual reciprocating rotary drive shaft (not illustrated) of the sewing machine. Preferably only one or only a few of the turns of each spring are eugageable with the loop taker.
  • the bobbin case 14 (Figs. 9, 12, 13) is journalled on shaft 19.
  • the springs 6 of driver 1 strike against the loop taker 18 and accelerate it by impact.
  • the bobbin case 2.4 and the horn 13 are also subjected to an impact-wise pendulous movement due to the friction occurring between shaft 1? and the bore of the bobbin case or due to the thread passing upwardly from the bobbin.
  • Stitch-forming mechanism for oscillating loop taker sewin machines comprising a shaft, a driver rotationally reciprocable about the axis of said shaft, a loop taker coaxially movable about said axis and disposed in the path of said driver to be reciprocatingly driven thereby, a bobbin case rotatable about said axis and having a horn projecting in a direction outwardly away from said shaft, a loop-taker guide ring having an opening concentric to said axis and having a recess extending outwardly from said opening and straddling the end of said horn, first elastic means mounted on said driver and disposed between said driver and said loop taker, and second elastic means mounted on said ring and disposed in said recess and engageable by said horn end to absorb impact-like pendulous movements of said horn due to impacts of said driver upon said loop taker.
  • said driver having a recess in its end facing said loop taker, and said first elastic means comprising a coiled spring seated in said recess and secured to said driver; said spring having a coil portion projecting out of said recess and away from'said driver toward said loop taker to be engageable with said loop taker.
  • said first elastic means comprising a coiled spring
  • fastening means passing through said spring and being secured to said driver for attaching said spring thereto, said spring projecting from said driver toward said loop taker and being engageable with said'loop taker.
  • Switch-forming mechanisrnior oscillating loop-taker V sewing machines comprising a shaft, a driver rotationally reciprocable about the axis of said shaft, a loop-taker coaxially movable about said axis and disposed in the path of said driver to be reciprocatingly driven thereby,
  • a bobbin case rotatable about said axis and having a horn projecting in a direction outwardly away from said adjacent to said recess, said spring having a central 7 curved portion extending into said recess in spaced relation with respect thereto and being engageable with said end of said horn, said spring having end portions secured grooves in opposite sides of said recess in said loop-taker.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US372895A 1952-11-14 1953-07-24 Loop-taker mechanism for sewing machines Expired - Lifetime US2741199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2741199X 1952-11-14

Publications (1)

Publication Number Publication Date
US2741199A true US2741199A (en) 1956-04-10

Family

ID=7997472

Family Applications (1)

Application Number Title Priority Date Filing Date
US372895A Expired - Lifetime US2741199A (en) 1952-11-14 1953-07-24 Loop-taker mechanism for sewing machines

Country Status (2)

Country Link
US (1) US2741199A (fr)
FR (1) FR1076028A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064605A (en) * 1958-05-07 1962-11-20 Borletti Spa Shuttle thrower for sewing machines
US5029544A (en) * 1989-02-27 1991-07-09 Hirose Manufacturing Co., Ltd. Oscillating loop taker for a sewing machine
US20050279265A1 (en) * 2004-03-09 2005-12-22 Chih-I Chien Wire-guiding structure of a shuttle of a sewing machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB341756A (en) * 1930-02-21 1931-01-22 Singer Mfg Co Improvements in oscillating shuttle mechanism for sewing machines
US2007894A (en) * 1934-05-12 1935-07-09 Singer Mfg Co Thread-case rotation-restraining means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB341756A (en) * 1930-02-21 1931-01-22 Singer Mfg Co Improvements in oscillating shuttle mechanism for sewing machines
US2007894A (en) * 1934-05-12 1935-07-09 Singer Mfg Co Thread-case rotation-restraining means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064605A (en) * 1958-05-07 1962-11-20 Borletti Spa Shuttle thrower for sewing machines
US5029544A (en) * 1989-02-27 1991-07-09 Hirose Manufacturing Co., Ltd. Oscillating loop taker for a sewing machine
US20050279265A1 (en) * 2004-03-09 2005-12-22 Chih-I Chien Wire-guiding structure of a shuttle of a sewing machine

Also Published As

Publication number Publication date
FR1076028A (fr) 1954-10-21

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