US1877757A - Lock-stitch sewing machine - Google Patents

Lock-stitch sewing machine Download PDF

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Publication number
US1877757A
US1877757A US512057A US51205731A US1877757A US 1877757 A US1877757 A US 1877757A US 512057 A US512057 A US 512057A US 51205731 A US51205731 A US 51205731A US 1877757 A US1877757 A US 1877757A
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US
United States
Prior art keywords
needle
feed
stitch
thread
shuttle
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
US512057A
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English (en)
Inventor
Hemleb Martin
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
Priority to BE378198D priority Critical patent/BE378198A/xx
Application filed by Singer Co filed Critical Singer Co
Priority to US512057A priority patent/US1877757A/en
Priority to FR713511D priority patent/FR713511A/fr
Application granted granted Critical
Publication of US1877757A publication Critical patent/US1877757A/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
    • 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

  • 'llfhfie invention relates to lock-stitch sewing machines of the type employing, a shuttle oscilla lin a vertical plane parallel tothe line on; eed.: Machines of this type have 5 been provided with reversiblefeeding mechgnisrhs of various kinds -for producing chieiy *seeking-utf .or back -itehing operations attire-ends ofstraightaway seams. It
  • Th'ej present invention' has for :an Vob'ect to provide astraightaway" reversible'- eed shuttle-machine oithe type'r'eferred to, which s will sewiperfectlock-stitch seamsje'qually 5 well'ineitherdirection.
  • Fig. l is a lon 'tudinal vertlcal section oil a sewing machine' embodying the invention.
  • Fig. is an enlarged detail view of the needle. resserdoot and shuttle; the latter Abeing' in oop-seizinglposition.
  • Fig. 3 is a vertical sec tion throu the bracket-arm standard on the 'line 234-3, ig. 1.
  • Fig. 4 is anenlarged face view of the shuttle and 'shuttle race in position' below the sewing machine bed.
  • Fig.. ii isl a lface'view of the stop-plate for the feed'-V reversing lever.
  • Figs. 7'?, Pand 7 aresimilar views illustrating .the formation of thestitch by the present machine when adj usted to feed rearwardly or I'toward the operator.
  • Figs. 8, 8". 8 amig, 9", 9" are similar sets of views showing the stitchfformation of a lmown machine of the 'present 'type having reversible feeding mechanisrn. A comparative stud of these several sets of diagrammatic views will make mgrovement.
  • the frame comprises the usllfl bed 1 vfrom which rises the standard 2 ofthe 'bracket-arm 3 terminating in thehead 4 in which the needle-bar 5 carrying the eyeointed needle 6 is mounted to reciprocate.
  • ournaled-"in the arm 3 ⁇ is the main-shaft 7 carryingat its rearward end the'balance wheel 8 and at its forward end 16 the barrel-cam 9 for the usual take-up 10.
  • the barrel-cam 9 has mounted on its end-face a crank-pin 11 which is connected by the link 12 tothe needle-bar 5.
  • the head 4 also has mounted in it the spring-pressed presser-bar 13 carrying the usual presser-foot 14.
  • the usual tension-device 15 is mounted on the face-plate 16 which closes the open face of the head 4.
  • the eedin mechanism is of the reversible type discl for example in the patents to Diehl No. 575,339, of Jan. 19, 1897, and Hleb No. 1,477,264, of Dec. 11, 1923.
  • This medianism comprises a feed-advancing cam .17 fixed to the main-shaft 7 and embraced by the forked upper end of a pitman 18 the lower Iendof which is pivotally connected to the arm 19 of the feed-rocker 20 which is pivoted on the pintle-centers 21.
  • the feedgq rocker 20 includes the upstanding arms 22 to which is pivoted at 23 the feed-bar 24 carrying the feed-dog 25 which operates upon the under side of the work through the usual slotted throat-plate 26 in which 1s formed the 25 needle-hole 27.
  • the pitman '18 has pivoted to it at 28 a slide-block 29 which enters a guideway 30 in the ide-block 31 pivoted at 32 to an internal iig 33 on the standard 2.
  • a fingerao piece 34 is secured to the guide-block 31 and extends out through the vertical slot 35 in the plate 36 which covers the front openin 37 in the standard 2.
  • Disposed immediate y behind the cover-plate 36 is the circularly ad- 23 just-able stop-plate 38 having several diderently spaced pairs of opposed stop-shoulders 39, 39 on dierent diameters of the stop-plate, as disclosed in the Hleb patent referred to.
  • the feed-bar 24 is forked at its forward end to embrace the roller 4() on the arm 41 of the feed-lift rocker 42 to which is Fixed the forked-arm 43 embracing the feed-lift cam 44 on the rock-shaft 45 which carries the usual forked arm 46 for oscillating the shuttle-driving shaft 47 through the usual slide block 48 and crank-arm 49 construction, disclosed for example in the patent to Diehl No. 374,661, of Dec. 13, 1887.
  • the rock-shaft has an arm 50 which is connected hy the operating pitman 51 to the crank 52 on the main-shaft 7
  • the guideway 30 in the block 31 is so inclined relative to the pitman 18 as to cause the feed-dog to move away from the operator when in its elevated position, thus glving a forward feedin movement to the work.
  • the finger ever 34 is thrown upwardly, the inclination of the guideway 30 is reversed and the pitman 13 is caused to move the feed-dog toward the operator when in its elevated position, thus giving a reverse feeding vmovement. to the work.
  • the shuttle-driving shaft 47 carries at its end remote from the standard 2 the arcuate thread-case arm 61 with the notch 62, Fig. 1,
  • the shuttle oscillates in t. vertical plane parallel to the line of feed and that the shuttle is so constructed and arranged that its beak 58 seizes the nascent needle-loo 63, Figs. 2, 6EL and 7 on the side of the needle away from or more remote from the standard 2. It will also be observed that the beak of the shuttle moves in the direction of forward feed, or away from the operator, when seizin the nascent needle-loop.
  • the needle is t readed in a direction away from the standard 2, as shown in Fig. 1.
  • Figs. 6, 6, and 6 show the formation of the stitch when the direction of feed is away l from the o erator.
  • the needle-loop 63 Fig. 6, is ing drawn up free from the objectionable half-hitch. So also in Fig. 7, with the feed reversed, the needle-loop 63 is hee from the objectionable half-hitch. ln both ses, looking in the direction of feed, the observer will see the needle-thread appreaching him in a clock-wise spiral around the bobbin-thread.
  • a right-hand or clockwise spiralling of the needle-thread is desirable in sewing with the standard left-twist silk threads readily obtainable, as it tends to tighten the strands or emps ot such threads.
  • Machines of the present type were open to the objection that while they would sew a clock-wise spirally formed perfect stitch when ieeding the work away from the operator, they invariably formed a knotted or hitch-stitch of reverse twist when the direction of feed was reversed.
  • Such machines will tighten a left twisted needle-thread when feeding forwardly and will loosen the twistof the same needle-thread when feeding in the reverse direction.
  • such machines will. not ordinarily sew more than a few inches in the reverse direction with silk thread before/the thread is so frayed that it breaks.. This will be made clear by reference to Figs. 88L to 9? lnclusive.
  • the shuttle 54 seizes the nascent needle-loop 63x11 on the side of the needle nearer the stand-n and the shuttle-beak passing between the needle and the lead of the bobbin-thread for either direction o'f feed.
  • the shuttle 54 carries the usual thread-case 60 havin the usual rotation-restraining tongue 61.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US512057A 1931-01-29 1931-01-29 Lock-stitch sewing machine Expired - Lifetime US1877757A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE378198D BE378198A (US07655688-20100202-C00086.png) 1931-01-29
US512057A US1877757A (en) 1931-01-29 1931-01-29 Lock-stitch sewing machine
FR713511D FR713511A (fr) 1931-01-29 1931-03-18 Machine à coudre à point de chaînette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US512057A US1877757A (en) 1931-01-29 1931-01-29 Lock-stitch sewing machine

Publications (1)

Publication Number Publication Date
US1877757A true US1877757A (en) 1932-09-20

Family

ID=24037493

Family Applications (1)

Application Number Title Priority Date Filing Date
US512057A Expired - Lifetime US1877757A (en) 1931-01-29 1931-01-29 Lock-stitch sewing machine

Country Status (3)

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US (1) US1877757A (US07655688-20100202-C00086.png)
BE (1) BE378198A (US07655688-20100202-C00086.png)
FR (1) FR713511A (US07655688-20100202-C00086.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822773A (en) * 1954-10-22 1958-02-11 Singer Mfg Co Shuttle mechanisms for sewing machines
US3006298A (en) * 1958-08-28 1961-10-31 Singer Mfg Co Loop takers for sewing machines
US3018747A (en) * 1955-04-14 1962-01-30 Moro Antonio Support arrangement for mounting the mechanism located under the base of sewing machines
US3082722A (en) * 1958-08-08 1963-03-26 Nihon Mishin Seizo Kabushiki K Stitch-forming mechanism of a sewing machine
US3596619A (en) * 1966-04-12 1971-08-03 Ragnar William Winberg A lock stitch sewing machine having crescent-shaped bobbin
US20040084102A1 (en) * 2002-10-22 2004-05-06 Daniele Cerliani Central bobbin shuttle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822773A (en) * 1954-10-22 1958-02-11 Singer Mfg Co Shuttle mechanisms for sewing machines
US3018747A (en) * 1955-04-14 1962-01-30 Moro Antonio Support arrangement for mounting the mechanism located under the base of sewing machines
US3082722A (en) * 1958-08-08 1963-03-26 Nihon Mishin Seizo Kabushiki K Stitch-forming mechanism of a sewing machine
US3006298A (en) * 1958-08-28 1961-10-31 Singer Mfg Co Loop takers for sewing machines
US3596619A (en) * 1966-04-12 1971-08-03 Ragnar William Winberg A lock stitch sewing machine having crescent-shaped bobbin
US20040084102A1 (en) * 2002-10-22 2004-05-06 Daniele Cerliani Central bobbin shuttle
US7069868B2 (en) * 2002-10-22 2006-07-04 Daniele Cerliani Central bobbin shuttle

Also Published As

Publication number Publication date
BE378198A (US07655688-20100202-C00086.png)
FR713511A (fr) 1931-11-06

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