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US2350267A - Sewing machine for corner stitching - Google Patents

Sewing machine for corner stitching Download PDF

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Publication number
US2350267A
US2350267A US465415A US46541542A US2350267A US 2350267 A US2350267 A US 2350267A US 465415 A US465415 A US 465415A US 46541542 A US46541542 A US 46541542A US 2350267 A US2350267 A US 2350267A
Authority
US
United States
Prior art keywords
needle
work
thread
slot
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
US465415A
Other languages
English (en)
Inventor
Zonis Sydney
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 US465415A priority Critical patent/US2350267A/en
Priority to GB12787/43A priority patent/GB567335A/en
Application granted granted Critical
Publication of US2350267A publication Critical patent/US2350267A/en
Priority to FR916358D priority patent/FR916358A/fr
Priority to AT170488D priority patent/AT170488B/de
Priority to DEP23334D priority patent/DE836877C/de
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
    • D05B15/00—Machines for sewing leather goods
    • 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
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • This invention relates'to sewing machines and more particularly to sewing machines employed for producing angular or corner seams, i. e., for producing stitched seams in which a line of stitches continues about a sharp corner into another line of stitches.
  • Fig. 1 is a front end elevation of a chain-stitch sewing machine containing the present improvement, the bed-plate being shown in vertical section and the bracket-arm being partly broken away.
  • Fig. 2 is a bottom plan view of a portion of the machine in the region of the needle, the looper being broken away to expose the thread.- positioning member. elevation, partly in vertical section, of the stitchforming and work-feeding instrumentalities
  • Fig. 3 is an enlarged end with the needle in substantially its lowest position while in the work; the feed-dog being'sedtioned longitudinally of the left hand row of the teeth thereof and the work being sectioned in the line of seam formation.
  • Fig-4 is a front side elevation, partly in vertical section, of the stitchforming instrumentalities in the position thereof illustrated in Fig.
  • Fig. 5 is a View similar to Fig. 3, but with the work turned to the left about the needle.
  • Fig.6 is a. View corresponding to Fig. 4,'but with the work turned about the needle as in Fig. 5.
  • Fig. 7 is a view corresponding to Fig. 6, but'in an upstroke position of the needle in which the work-limb of the needle-thread loop is bowed outwardly and entered by'the looper.
  • Fig. 8 is a top plan View of the mechanism as illustrated in Fig. 7; the needle :being shown in section and the finished stitches being shown partly in section as disposed substantially normal to the line of seam formation.
  • FIG. 9 is an enlarged fragmentary topplan view of the work-support, feed-dog and looper, and illustrates the needle-thread loops (partly in section) in the loop-casting-off position of the looper.
  • Fig. 10 is an enlarged fragmentary view in top plan of the needle-thread positioning member, with the needle and needlethread shown in horizontal section, and the needle-slot of the work-support shown in dot-' dash lines. throat-plate. the needle-thread positioning member. is a perspective View of the feed-dog.
  • Fig. 11 is a perspective View of the Fig. 12 is a perspective view of Fig. 13
  • the sewing machine in part shown has a frame including a bedplate I provided with a throat-plate 2 which, in part shown has a frame including a bedplate I provided with a throat-plate 2 which, in part shown has a frame including a bedplate I provided with a throat-plate 2 which, in part shown has a frame including a bedplate I provided with a throat-plate 2 which, in part shown has a frame including a bedplate I provided with a throat-plate 2 which, in
  • the bracket-arm head 3 Journaled in the bracket-arm head 3 is an end wise vertically reciprocatory needle-bar and an endwise vertically movable presser-bar 5.
  • the needle-bar 4 carries at its lower end an eyepointed needle 6, while the presser-bar 5 carries at its lower end a presser-foot I; said presserbar 5 being spring-depressed in any usual or suitable manner;
  • a rotary wing-type looper 8 of conventional form.
  • the looper 8 as usual, has a curved loop-seizing beak 9 merging into a loopexpanding body I which terminates in a transverse loop-detaining throat ll. Extending rearwardly beyond the throat II is a loop-twisting and spreading wing l2 for holding the seized and spread needle-thread loop in position for subsequent entrance by the beak 9 of the looper.
  • the looper 8 has a shank-pin l3 entering an end bore of a rotary looper-shaft l4, to which shaft the shank-pin I3 is secured by a screw IS.
  • the looper-shaft also carries the usual spacing'collar I 6, secured to the shaft by a screw I1 and disposed adjacent the looper.
  • the looper-shaft I4 is journaled horizontally at the under side of the bed-plate I and is suitably driven to perform one rotation for each complete reciprocation of the needle.
  • the throat-plate 2 is provided with a needleslot l8 which is elongated in the line of seam formation to extend rearwardly a substantial distance beyond the path of reciprocation of the needle 6; the needle having its path of reciprocation at the forward end of the needle-slot [8.
  • the throat-plate 2 is also provided with a plurality of feed-slots I9, 20, 2
  • the feed-slot I8 is disposed at the right hand side of the needle-slot I8; said feed-slot beginning from adjacent the forward end of the needle-slot I8 and terminating at itsrearward end adjacent the rearward end of the feed-slot 2
  • the feedslot 22 is disposed at the left hand side of the needle-slot l8 and preferably extends from adjacent the forward end of the feed-slot 20to adjacent the rearward end of the feed-slot 2
  • a feed-dog 23 which is .opposed in the work-engaging movements thereofby the presser-foot l.
  • the feed-dog 23 has a right hand row of teeth 24 suitable to operate through the feed-slot 19; a middle front row of teeth 25 suitable to operate through the feed-slot 20; a
  • the upper face of the throat-plate 2 is cut away or depressed between the needle-slot l8 and the feed-slot 22 to provide in the work-support a thread-clearance recess 28 which pref- 1 erably begins slightly rearwardly of the forward end of said needle-slot; thereby to leave adequate support for the work adjacent the needle path.
  • the edge defining the forward end of the recess 28 is preferably inclined forwardly toward the feed-slot 22; and the bottom wall of the recess 28 is gradually curved upwardly at the rearward end of said recess to merge gradually into the upper face of the throat-plate 2.
  • the left hand row of teeth 21 of the feed-dog 23 is also interrupted or cut away between the ends of the row to provide a thread-clearance depression or recess 29 adjacent to and forming a continuation of the throat-plate recess 28.
  • the feed-dog 23 is carried by a feed-bar 30 disposed below the work-support.
  • the rearward end of the feed-bar 30 is pivotally connected to a feed-rocker 3
  • the forward end of the feed-bar 30 is forked to slidably embrace a pivot-block 33 carried by a crank-arm 34 extending rearwardly from a feedlift rock-shaft 35 which may likewise be supported and actuated in any usual or preferred manner in timed relation to the movements of the feed-advance rock-shaft 32 to impart intermittent work-advancing movements to the feeddog 23.
  • a needle-guide 36 bent upwardly from its shank 31; said shank 31 being attached by a screw 38 to the under side of the bed-plate l.
  • the needle-guide 38 has a needle-deflecting face 39 inclined downwardly to merge into a substantially vertical needle-abutment face 40 disposed at the long-groove side of the needle, i. e., the face 48 is disposed at the side of the needle opposite to that at which the looper 8 enters the needle-thread loops.
  • the face 40 of the needle-guide serves as an abutment inducing the opening of the needle-thread loops at the looper side of the needle, in the rising movement of the needle.
  • the looper 8 'enters the needle-thread loop a, b between the needle 6 and the needle-thread loop-limb b which is anchored in the work.
  • This limb b of the needle-thread loop is therefore commonly termed the work-limb; while the other limb a 1 -of the needle-thread loop, at the opposite side of the needle is commonly termed the take-up limb, because it extends through the work to the needle-thread take-up (not shown).
  • the throat-plate 2 is recessed in its under face and at the looper-beak side of the needle-path to form a seat 4
  • , which confine the shank 42 to endwise adjustment, are inclined rearwardly at an angle of approximately to the line of seam formation.
  • the member 43 extends in front of and across the throat-plate feed-slot I9 toward the path of needle reciprocation. Near its free end, the member 43 has a needle-guiding and threadloop positioning edge 46 which is rearwardly inclined, preferably at an angle of approximately 10, toward the line of seam formation.
  • the edge 46 of the member 43 extends partly across the throat-plate needle-slot l8 and slightly past the needle-path in close proximity to said path at the needle-thread-loop work-limb side of said path, whereby said edge 46 is disposed substantially tangential to the needle 5 rearwardly of said work-limb b of the needle-thread loop in any work-penetrant positions of said needle beyond the needle-eye.
  • the edge 46 preferably terminates at its rearward end substantially in the plane containing the line of seam formation and the path of needle-reciprocation. By endwise adjustment of the member 43, the edge 46 thereof may be shifted laterally toward and from the path of needle-reciprocation in a direction inclined to the length of the needle-slot l8 of the throat-plate 2.
  • said work-limb b is restrained by the complemental action of the needle 6 and the edge'46 from passing rearwardly therebetween in any work-penetrating position of the needle beyond the needle-eye.
  • This condition is particularly of advantage when the work is turned about the needle in the production of angular or'corner seams, *because the work-limb b is thereby restrained from wrapping about the needle 6 at any point below the member 43, whereby the work-limb b of the needle-thread loop will be properly opened out and presented for seizure by the looper.
  • the present invention provides for turn ing the work about the needle for corner-stitching, in any work-penetrant position of the needle, because the work-limb will inevitably be crowded forwardly and positioned properly for seizure by the looper.
  • the stitch-formation is illustrated in Figs. 13 to 9 inclusive of the drawings.
  • the work 10 is shown as being advanced in the line of seam formation; the needle 6 being shown at substantially the lower end of its stroke.
  • the previously seized and spread thread-loop a, b is held opened out .rearwardly of the needle 5 by the throat I! of the looper 8, and the beak 9 of the looper is shown approaching the needle.
  • the thread-loop a, b is at this time positioned to therear of the need-1e, it is equally essential that the upper end of said thread-loop a b must have been free to move lengthwiseof the throat-plate needle-slot 18 during the previous feeding movement of the work.
  • the present worklimb positioning device leaves the thread-loop a 1) free to advance rearwardly in the needleslot 18 during said feeding of the work.
  • Fig. 4 of the drawings illustrates the same position of the parts as in Fig. 3, but as viewed from the front of the machine. served that the abutment face 40 of the needleguide 36 is opposed to the needle-guiding and thread-positioning member 43, whereby the needle 6 is constrained to reciprocate in such ing of thework about the needle 6, the portion It will be obof said work-limb b below the member 43 remains in the position which, as shown by comparison with Fig. 4, is the same as before the work was turned.
  • the Work-limb 1 opens out in. proper. position for seizure by the looperbeak 9', even though the work has been turned about the needle 6. This condition will obviously be obtained when the work is turned about the needle in any work-penetrant position of the needle. By thus eliminating any requirement to critically position the needle before turning the work, production is very substantially increased.
  • the described recesses 28 and 29 in the throat-plate and feed-dog. adjacent the needle-slot 13, provide sufficient thread-clearance to render negligible'the tension imposed upon the'thread when the work is turned to the left about the needle. This? is clearly illustrated in Figs. 5 to 8 of the drawings, which show the upper endsof the looplimbs a, b as lying in the recesses 28 and 29.
  • a work- 'support having a needle-opening, an endwise reciprocatory eye-pointed needle operating through said needle-opening, means complemental to-"Said .needle responsively to turning of the work in one direction about the needle;
  • a worksupport provided with a need1e-slot elongated in theline of scam formation, wcrk feeding means for advancing work rearwardly'of said needleslot, an endwise reciprocatory needle operating through the forward end portion of said needle-slot, said needle having a thread-receiving eye extending crosswise of said needle-slot, a rotary looper disposed below said work-support and having a loop-seizing beak and a loop detaining wing constructed and arranged to enchain loops of thread presented by said needle, and means for restraining the work-limb of the needle-thread loop from wrapping rearwardly about the needle between the needle-eye and the work in any work-penetrant positions of the needle beyond the needle-eye and responsively to turning of the Work about the needle, said means comprising a thread-positioning member complemental to said needle in blocking rearward movement of said work-limb.
  • said edge being disposed substantially tangential to said needle rearwardly of said work-limb in any work-penetrant positions of said needle beyond the needle-eye.
  • a work-support provided with a needle-opening, work-feeding means, an endwise reciprocatory needle having a thread-receiving eye extending crosswise of the line of feed, means complemental to said needle in the formation of stitches, and a member having a needle-thread positioning edge disposed at the needle-thread-loop worklimb side of the line of seam formation for engagement by the needle rearwardly of said worklimb in any work-penetrant positions of said needle beyond the needle-eye, said edge terminating substantially in the plane containing the path of needle-reciprocation and the line of seam formation.
  • work-support provided with a needle-slot, feeding means for advancing work lengthwise of said needle-slot, an endwise reciprocatory needle provided crosswise of said needle-slot with a thread-receiving eye, a looper complemental to said needle in the formation of stitches, a member having a needle-thread positioning edge extending partly across said needle;
  • a work-support provided with a needle-slot, feeding means. for advancing work lengthwise of said needle-slot, an endwise reciprocatory needle provided crosswise of said needle-slot with a thread-receiving eye, a looper complemental to said needle in the formation of stitches; a stationary member disposed in the region of said work-support and having a needle-thread positioning edge extending past the needle-path at the work-limb side of the needle-thread loopgated in the line of seam formation, an endwise reciprocatory needle operating through and 8.
  • a sewing machine in combination, a sewing machine, in combination, a
  • a stationary member having thread-positioning and thread-loop cast-ofi' edges oppositely inclined to the line of seam formation at the worklimb side of the needle-thread loop, said edges merging together in the region of said work-support rearwardly of and in close proximity to the path of needle reciprocation.
  • a work-support provided with a needle-slot elongated in the line of seam formation, an endwise reciprocatory needle operating through and having a thread-receiving'eye extending crosswise bf said needle-slot, a looper complemental to said needle in the formation of stitches, a stationary thread-positioning edge rearwardly inclined to the line of scam formation at the worklimb side of the needle-thread loop and extending into tangential relation with the needlepath rearwardly of the needle-eye, and a stationary thread-loop cast-off edge inclined rearwardly away from the line of seam formation at the work-limb side of said needle-slot, said castoff edge merging into the rearward end of said thread-positioning edge, and being disposed in the region of, said work-support.
  • a feed-dog having workengaging teeth operating through said feed-slot, an endwise reciprocatory needle operating through said needle-slot, said needle having a thread-eye extending crosswise of said needleslot, and a looper cooperating with said needle at the side thereof opposite to said feed-slot in the formation of chain-stitches
  • the improvement which consists in the provision in the workengaged face of said work-support of a threadclearance recess extending from said needle-slot to said feed-slot, and in the provision in the teeth of said feed-dog of a thread-clearance recess adjacent to and forming a, continuation of the recess of said work-support, thereby to provide clearance for the thread-loop extending from the work to the looper when the work is turned about the needle.
  • a Work-support provided with a needle-slot and a feed-slot lengthwise parallel to and disposed at one side of said needle-slot, a feed-dog having work-engaging teeth operating through said feed-slot, an endwise reciprocatory needle operating through said needle-slot, said needle having a thread-eye extending crosswise of said needle-slot, a looper cooperating with said needle at the side thereof opposite to said feed-slot in the formation of chain stitches, said work-support being provided in the work-engaged face thereof with a thread-clearance recess extending from said needle-slot to said feed-slot, and said feed-dog being cut away to provide the workengaging portion thereof with a thread-clearance recess adjacent to and forming a continuation of the recess of said work-support, said recesses providing clearance for the thread-loop extending from the work to the looper when the work is turned about the needle, and a thread-positioning member complemental to said needle
  • a work-support provided with a needle-slot and a feed-slot lengthwise parallel to and disposed at one side of said needle-slot, a feed-dog having work-engaging teeth operating through said feed-slot, an endwise reciprocatory needle operating through said needle-slot, said needle having a thread-eye extending crosswise of said needle-slot, a rotary looper disposed below said worksupport and having a loop-seizing beak and a loop-detaining wing, said looper rotating in timed relation to the reciprocations of said needle to carry each newly seized needle-thread loop through the previously seized needle-thread loop held spread by the looper, said work-support being provided in the work-engaged face thereof with a thread-clearance recess substantially coextensive with the length of said needle-slot and extending from said needle-slot to said feed-slot, and said feed-dog being cut away to provide the work-engaging portion thereof with a thread
  • a work-support having a needle-opening, workfeeding means, an endwise reciprocatory eyepointed needle operating through said needleopening, means complemental to said needle in the formation of stitches
  • a stationary member having a needle-guiding and thread-loop positioning edge disposed substantially tangential to said needle in the region of said work-support and rearwardly of the needle-thread-loop limb anchored in the work, and a needle-guide disposed at the side of the needle opposite to said edge in sufiiciently close proximity to said needle to maintain the tangential relation of said edge with the needle.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US465415A 1942-11-13 1942-11-13 Sewing machine for corner stitching Expired - Lifetime US2350267A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US465415A US2350267A (en) 1942-11-13 1942-11-13 Sewing machine for corner stitching
GB12787/43A GB567335A (en) 1942-11-13 1943-08-07 Sewing machine for corner stitching
FR916358D FR916358A (fr) 1942-11-13 1945-10-23 Machine à coudre pour coutures d'angle
AT170488D AT170488B (de) 1942-11-13 1948-12-02 Vorrichtung zur Herstellung winkelig verlaufender Nähte
DEP23334D DE836877C (de) 1942-11-13 1948-12-02 Naehmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US465415A US2350267A (en) 1942-11-13 1942-11-13 Sewing machine for corner stitching
GB12787/43A GB567335A (en) 1942-11-13 1943-08-07 Sewing machine for corner stitching

Publications (1)

Publication Number Publication Date
US2350267A true US2350267A (en) 1944-05-30

Family

ID=10011110

Family Applications (1)

Application Number Title Priority Date Filing Date
US465415A Expired - Lifetime US2350267A (en) 1942-11-13 1942-11-13 Sewing machine for corner stitching

Country Status (5)

Country Link
US (1) US2350267A (de)
AT (1) AT170488B (de)
DE (1) DE836877C (de)
FR (1) FR916358A (de)
GB (1) GB567335A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482077A (en) * 1947-02-18 1949-09-13 Singer Mfg Co Thread-controlling mechanism for sewing machines
US2488390A (en) * 1945-08-29 1949-11-15 Fischbein Dave Throat plate for sewing machines
US2593196A (en) * 1947-10-25 1952-04-15 Hermas Machine Company Railway sewing machine
US2633584A (en) * 1950-08-04 1953-04-07 United Shoe Machinery Corp Stitchdown lasting machine
US4266494A (en) * 1977-11-09 1981-05-12 The Singer Company Anti-haloing throat plate
US4297957A (en) * 1978-09-11 1981-11-03 The Singer Company Anti-haloing throat plate
US4316421A (en) * 1978-09-11 1982-02-23 The Singer Company Anti-haloing throat plate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488390A (en) * 1945-08-29 1949-11-15 Fischbein Dave Throat plate for sewing machines
US2482077A (en) * 1947-02-18 1949-09-13 Singer Mfg Co Thread-controlling mechanism for sewing machines
US2593196A (en) * 1947-10-25 1952-04-15 Hermas Machine Company Railway sewing machine
US2633584A (en) * 1950-08-04 1953-04-07 United Shoe Machinery Corp Stitchdown lasting machine
US4266494A (en) * 1977-11-09 1981-05-12 The Singer Company Anti-haloing throat plate
US4297957A (en) * 1978-09-11 1981-11-03 The Singer Company Anti-haloing throat plate
US4316421A (en) * 1978-09-11 1982-02-23 The Singer Company Anti-haloing throat plate

Also Published As

Publication number Publication date
AT170488B (de) 1952-02-25
FR916358A (fr) 1946-12-04
DE836877C (de) 1952-05-15
GB567335A (en) 1945-02-08

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