US2416941A - Blind-stitch machine - Google Patents

Blind-stitch machine Download PDF

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Publication number
US2416941A
US2416941A US496579A US49657943A US2416941A US 2416941 A US2416941 A US 2416941A US 496579 A US496579 A US 496579A US 49657943 A US49657943 A US 49657943A US 2416941 A US2416941 A US 2416941A
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US
United States
Prior art keywords
work
node
former
presser foot
stitch
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
US496579A
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English (en)
Inventor
Charles W Mueller
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.)
Lewis Invisible Stitch Machine Co
Original Assignee
Lewis Invisible Stitch 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
Priority to NL77432D priority Critical patent/NL77432C/xx
Priority to BE479364D priority patent/BE479364A/xx
Application filed by Lewis Invisible Stitch Machine Co filed Critical Lewis Invisible Stitch Machine Co
Priority to US496579A priority patent/US2416941A/en
Priority to GB19305/43A priority patent/GB571094A/en
Priority to FR941623D priority patent/FR941623A/fr
Application granted granted Critical
Publication of US2416941A publication Critical patent/US2416941A/en
Priority to DEP29150A priority patent/DE806308C/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
    • D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
    • D05B1/24—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making blind-stitch seams
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D05B85/06—Curved needles

Definitions

  • the-node-former In certain types of blind-stitch sewing machines, -particularly the small high speed machines, it has been the common practice to have the-node-former carried by the work table. It is necessary that the node-former be yieldable in order to accommodate seams and also be so arranged that it may be withdrawn from the presser foot forthe insertion and removal ofwork. Heretofore, and prior to this invention, it was the common practice to make the entire work table yieldable. Thus, the node-former was mounted upon a yieldable work table as was also the work support-which consists of two independently moveable plattens. that support the work against the presser foot. a
  • Aheavy pressure or force is required to maintainlthe node-former'in position when forming a node through the opening in the presser'foot.
  • This force is commonly exerted by a heavy spring which, in the construction mentioned, acts upon the work table.
  • a heavy spring which, in the construction mentioned, acts upon the work table.
  • To open the machine for the insertion or removal of work it is necessary for the operator, manually, and commonly through a knee press, to overcome the resistance of the heavy spring.
  • An object-of this invention ' is to provide a construction in which the machine may be opened without the necessity of overcomin the resistance of I the heavy yieldable force maintaining the node-former in operative position.
  • Another object of-the invention is to provide a construction in which the work support may be moved away from the presser foot independently of the nodeformer.
  • a further object of the invention is to provide a construction in which, by a single manual operation, the work support is moved away, from the presser foot and the node-former is positioned away from the presser foot, providing an ample unobstructedopening for the insertion orremoval of work.
  • Fig. 1 is a plan view of a. machine em bodying the, invention
  • Fig, 2 which is a front elevation of the same
  • Fig. 3' which is a sectional front elevation of the same taken on the line 3-3 of.
  • Fig. l ;
  • Figs. 12 and 13 which show in elevation certain parts of the machine in two different positions of 7 their movement.
  • the machine illustrated in the drawings includes a frame upon which all of the mechanism is mounted.
  • This frame comprises a base I, a post 2 secured to the base at the rear thereof, an arm 3 extending from the upper end of the post, a forwardly extending arm 4, secured to the end of the arm 3, and a work table 5 secured to the base at the front thereof and extending to the arm 4.
  • the various sections of the frame are hollow, and within the sections, operatin and driving mechanism is mounted.
  • the sewing machine isdriven through a main shaft 6 that is journaled in the post 2 and the arm 3. This shaft extends through the post and has mounted thereon a combined pulley 1 and hand wheel 8.
  • the belt 9 from a power not shown.
  • the pulley is driven through a On the end of the arm 4, there is a presser foot- III which overhangs the end of the work table '5, The work is supported against thispresser
  • the presser foot is of the usual and well-- foot. known construction and has an opening I I there-j through, through which, during the operation of the machine, nodes of material operated upon extend.
  • the stitch-forming mechanism is of the usual sewing machines of thisand well-known kind in type.
  • a needle bar shaft I2 is journaled ,inthe arm 4 and extends through the end of the arm.
  • a needle bar l3 On the extended end of the shaft l2, there is mounted a needle bar l3 which carries a curved needle [4. Through suitable connections with the main shaft, the needle bar shaft is oscillated to cause the needle to move across the opening in the presser foot.
  • the particular machine illustrated is a chain-stitch machine and is provided with a looper l5 which cooperates with the needle in the formation of stitches.
  • the invention is not restricted to a chain-stitch,
  • blind-stitch machine as it is'equally applicable to a lock-stitch, blind-stitch machine of the same kind.
  • stitch line is supported against the under side of the presser foot by a work support which consists of a pair of work-supporting plattens l6;and l1. These plattens are mounted for independent pivotal movement and for movement toward and away from the presser foot. They are shaft or an electric motor.
  • the mounting for the platten ll includes a lever l8, in the nature of a bell crank lever, that is pivotally l9.
  • One arm 18a of the lever is curved, as shown, and on the end thereof, there pivot pin 20, is mounted I! is pivotally mountedon the pivot pin 20.
  • is securedin an adjustable anchor opening in the side wall of [the "work table .5.
  • a check nut 23 secures the anchor "pin in adjusted position.
  • is a comparatively light spring as the function of the plattens is merely to support the portion of the work operated upon against the presser foot.
  • the end portionof the work table extending under the presser foot is of much greater disarm lBc of the lever I8 pin 22 threaded through an tance from the pres'ser foot than the work't'a-ble of the common machine of this kind.
  • the distance between the work table and presser foot is sufficient, when unobstructed, to permit the ready insertion and removal of work between the p're'sser foot and the work table.
  • the plattens are retractable as the work lever 1-8 of the table is fixed.
  • A-likelu pla't'ten ll is provided with a lug is "formed on the corresponding ten l-G which is indicated by and normally spaced from them, there is a rod 24 which extends from aluus'hing or'collar 25 that is secured "to a shaft Eli/(Fig.4).
  • the rod 24 is normally spaced from theflu'gs tofpermi't limited independent movement of *the plattens.
  • theplatften supporting levers such as the lever 18, are moved to withdraw the plattens to a position away from the p'resser foot- 1:0 the position of the platten 11, shown in Fig. '10.
  • Thej'node former (Fig. 4) is mounted on the end of a shaft 35 that is journaled in spaced bearings 36 and 3-l ofa Cradle-5 B.
  • the 'cradle38 is pivotally'mount ed on "centering pins 39' and 4'0 threaded through brackets ll and '42 extending inwardly from the side wallofthe'work'tab'le.
  • the cradle 38 (Figs.
  • the force exerted on the cradle by the spring 43 may be adjusted, to a limited extent, by adjusting the anchor pin 45.
  • the anchor ,pin 45 is held in adjusted positi-on by a check nut 46.
  • the node-former is oscillated "in timed relation with the stitch-forming and feed mechanism. In the upper position, adjacent the presser foot (Fig. 8.), the node-former forces a node of the material operated upon through the opening in the presser foot and into the path of the needle.
  • node-former must yield-J It is, thus, yieldingly f mounted as above described.
  • the depth of penetration of the needle is adjustable through adjustment of the cradle 38, that is, by limiting the movement of the cradle under the action of the spring 43.
  • the cradle is provided with a depending arm 4-1.
  • the countersink Fig. 7 preferably being a sector of a "sphere.
  • A'screw 49 having 9.
  • a threaded rod 60 having a knurled finger wheel 60 thereon en gages the block 59 and serves as the medium through which the depth of penetration ofx'the The nodeform'er is oscillated through .
  • This mechae ni'sm includesran excentric -5
  • the lever 64 extends from a "bushin'g irotatably mounted upon a shaftBB f'in theba'se "1.. Kn-
  • lever 61 extends from 'theitbushing ".65 "and is connected through a ball and socket 'ioint to one end of a connecting rod. G'rne other endof the, connecting rod'oa is 'pivotally connected,
  • lever 69 through'aball and "socket joint, -to one end of a lever 69.
  • the lever 69 is' pivo'ted *between its ends on a pivot shaft 10 that 'is "formed integral with, and excentric with respect to, a shaft jl l' journaled in a transverse bearing bracketH in the b'ase l
  • a lever or crank arm 14 on theend of the shaft 35 On rotation of the main shaft, the excentricoscillates the levers 64 and 81 which, through the connecting rod 68, oscillates the lever 89. Oscillation of the lever 69 is transmitted through the link 13 and the crank arm 14 to the shaft 35.
  • the connecting rod 68 is illustrated in one extreme position. In this position of the connecting rod, the node-former 34 is in node forming position.
  • Fig. 9 illustrates the same parts in the opposite position. In this position, the node-former is withdrawn from the presser foot.
  • the link 13, connecting the lever 69 and the crank arm 14, permits the shaft 35 to move, substantially vertically, when it is necessary for the node-former to yield.
  • the gear 15 meshes with a gear 16 secured on a shaft 17 that is rotatably mounted in and extends through the bearing bracket 12.
  • the gears 15 and 16 have a ratio of two to one.
  • the depth of penetration may be varied. This is effected through the excentric pivot.
  • the shaft H extends through the bearing bracket 12 and has secured thereon a circular block 84. From this block, and through a slot provided therefor in the top of the work table, a finger lever extends. The edge of the block is provided with spaced detent recesses 86 and 81 which cooperate with a resilient detent 88 mounted in a disk sector 89 secured on the shaft 11.
  • a blind-stitch sewing machine of the kind described comprising a presser foot having an opening therethrough, stitchforming mechanism on one side of the presser foot, work-presenting mechanism for presenting work to the stitch-forming mechanism including a movable node-former movable toward and away from the presser foot, mechanism for effecting movement of the node-former in timed relation with respect to the stitch-forming mechanism, a work support for supporting the work against the presser foot mounted for movement toward and away from the presser foot independently of the node-formeniand means for acting uponsaid mechanism for effecting movement ofthe node-"1 former awayfrom the presser foot, and means for moving the work-support away from the presser foot including means for actuating said means for efiecting movementoi the node-former away'fromthe pressure foot.
  • a blind-stitch sewing machine ofthe kind described comprising a presser foot having an opening 'therethrough; stitchforming mechanism on one side of the presser foot, work-presentin mechanism for presenting work to the stitch-forming mechanism including a movable-node-former movable toward and away from the presser foot, mechan-i'sm for effecting movement of the node-former in timed relation with respect to the stitch-forming mechanism, a
  • a blind-stitch sewing'machine of the kind 1 described comprising a presser foot having an opening therethrough, stitchforming mechanism on one side of the presser foot, work-presenting mechanism for presenting work to the stitch-forming mechanism including a movable node-former movable toward and away from the presser foot, mechanism for effecting movement of the node-former in timed relation with'respect to the stitch-forming mechanism, a
  • the combination comprising a. presser foot having an' opening therethrou'gh, stitchforming mechanism on one: side of the presser foot,'work-presenting1mechanism for presenting work to the: stitch-forming mechanism: including a movablenode-former-movable toward and, away from; the presser foot, mechanism for effecting movement of the node-former in. timedv relation with respect to the stitch-forming mechanism including. an angularly movable shaft, a work support for supporting. the work against the,
  • presser foot mounted for movement toward and away'irom the presserfoot, and means for moving the work support away from the presser'footi including means for efiecting angular movementof the shaft of said mechanism about its axis for effecting movement of the node-former away from the presser foot.
  • the combination comprising a presser foot having an opening ;therethrough, stitch-v forming mechanism on one side of the presser foot, work-presenting mechanism for presenting work to the stitch-forming mechanism including an angularly movable node-former, a work sup-i port for supporting the work against the presser foot mounted for movement toward and away from the presser foot, and means for moving the work supportvaway from the presser foot including means for. efiecting angular movement of the node-former.
  • the combination comprising a presser foot having anopening therethrough, stitchforrning mechanism on one side of the presser foot, work-presenting mechanism for present-' ing work to the stitch-forming mechanism :includ-ing a node-former movable between posi tions. adjacent to and away from the needle;
  • work-presenting mechanism for presenting work to the stitch-forming mocha nism including a node-former movable toward and away from the presser foot, actuating me cha nism for the node-former including a rotatably v mounted shaft, and manually operative means for rotating the shaft about its axis to move the node-former away from the presserfoota 10.
  • the combination comprising a I presser foot having an opening therethrough;
  • stitch-forming mechanism onone side ofthe presser" foot work-presenting mechanism for presenting work to the stitch-forming mechanism including an oscillating node-former; 'oscill'atable between a position adjacent the presser foot and a position away-from the presser foot; means for oscillating the node former intimedrelation with respect to the stitch-forming-mecm 'ani'sm including an angularly movableshaft, and.
  • manually operable means fo'r effecting angular movement of the shaft independently of' said node-former oscillating means to position the node-former away from thepresserfoot.
  • work-presenting mechanism for presenting work to the stitch-forming mechanism including an angularly movable node-former, means for efiecting movement of the nodeformer including a shaft, a lever for actuating the shaft and a shiftable pivot for the lever, and
  • manually operative means for shifting the pivot to position the node-former for the insertion and removal of work.
  • the combination comprising a presser foot having an opening therethrough, stitch-forming mechanism including a needle on one side of the presser foot, means for actuating the stitch-forming mechanism, work-presenting mechanism including an angularly movable nodeformer for presenting work to the needle, a resilient mounting for the node-former, means for actuating the node-former including a pivoted lever and a shiftable pivot for the lever, and manually operative means for shifting said shiftable pivot to position the node-former for the insertion removal of work.
  • the combination comprising a presser foot having an opening therethrough, stitch-forming mechanism including a needle on one side of the'presser foot, means for actuating the stitch-forming mechanism, work-presenting mechanism for presenting work to the stitchforming mechanism including a movable cradle, a shaft journaled in the cradle, resilient means for resiliently positioning the cradle and a nodeformer mounted on the shaft and positioned upon actuation to project a node of the work into the path of the needle, means for actuating one side of the presser foot, means for actuating the stitch-forming mechanism, a work support for supporting the work against the presser foot mounted for movement toward and away from the presser foot, work-presenting mechanism for presenting work to the stitch-forming mechanism including an oscillating node-former oscillatable between a position adjacent the presser foot and a position away from the presser foot, means for oscillating the node-former in timed relation with respect
  • the combination comprising a presser foot having an opening therethrough, stitch-forming mechanism on one side of the presser foot, means for actuating the stitch-forming mechanism, a work support for supporting work against the presser foot mounted for movement toward and away from the presser foot, work-presenting mechanism for presenting work to the stitch-forming mechanism including an angularly movable node-former, means for effecting movement of the node-former including a shaft, a lever for actuating the shaft, and a shiftable pivot for the lever, and manually operative means for moving the work support away from the presser foot and for shifting said shiftable pivot to position the node-former for the insertion and removal of work.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US496579A 1943-07-29 1943-07-29 Blind-stitch machine Expired - Lifetime US2416941A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL77432D NL77432C (de) 1943-07-29
BE479364D BE479364A (de) 1943-07-29
US496579A US2416941A (en) 1943-07-29 1943-07-29 Blind-stitch machine
GB19305/43A GB571094A (en) 1943-07-29 1943-11-18 Improvement in blind-stitch sewing machine
FR941623D FR941623A (fr) 1943-07-29 1946-04-16 Perfectionnement aux machines à coudre à point caché
DEP29150A DE806308C (de) 1943-07-29 1949-01-01 Blindstichnaehmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US496579A US2416941A (en) 1943-07-29 1943-07-29 Blind-stitch machine

Publications (1)

Publication Number Publication Date
US2416941A true US2416941A (en) 1947-03-04

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ID=23973260

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Application Number Title Priority Date Filing Date
US496579A Expired - Lifetime US2416941A (en) 1943-07-29 1943-07-29 Blind-stitch machine

Country Status (6)

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US (1) US2416941A (de)
BE (1) BE479364A (de)
DE (1) DE806308C (de)
FR (1) FR941623A (de)
GB (1) GB571094A (de)
NL (1) NL77432C (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632416A (en) * 1948-11-20 1953-03-24 Lewis Invisible Stitch Machine Node former adjusting means for blind stitch sewing machines
US2658464A (en) * 1951-05-23 1953-11-10 Greco Anthony Blind stitch machine
US2679814A (en) * 1948-12-27 1954-06-01 Lewis Invisible Stitch Machine Blind stitch sewing machine
US2699131A (en) * 1952-01-10 1955-01-11 Us Blind Stitch Machine Corp Blind stitch sewing machine
US2743688A (en) * 1954-10-22 1956-05-01 Singer Mfg Co Blindstitch sewing machine ridge former mechanisms
US2833234A (en) * 1955-08-02 1958-05-06 Singer Mfg Co Work-presenting mechanisms for blindstitch sewing machines
US4043284A (en) * 1975-03-17 1977-08-23 J. Strobel & Sohne Gmbh & Co. Blind stitch sewing machine
WO1981001020A1 (en) * 1979-10-15 1981-04-16 Marshall E Design Int Ltd Improvements in sewing machines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2038848A (en) * 1934-10-02 1936-04-28 Lewis Invisible Stitch Machine Sewing machine
US2199173A (en) * 1937-04-12 1940-04-30 Geoffrey Stevenson Work support for blind stitch sewing machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2038848A (en) * 1934-10-02 1936-04-28 Lewis Invisible Stitch Machine Sewing machine
US2199173A (en) * 1937-04-12 1940-04-30 Geoffrey Stevenson Work support for blind stitch sewing machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632416A (en) * 1948-11-20 1953-03-24 Lewis Invisible Stitch Machine Node former adjusting means for blind stitch sewing machines
US2679814A (en) * 1948-12-27 1954-06-01 Lewis Invisible Stitch Machine Blind stitch sewing machine
US2658464A (en) * 1951-05-23 1953-11-10 Greco Anthony Blind stitch machine
US2699131A (en) * 1952-01-10 1955-01-11 Us Blind Stitch Machine Corp Blind stitch sewing machine
US2743688A (en) * 1954-10-22 1956-05-01 Singer Mfg Co Blindstitch sewing machine ridge former mechanisms
US2833234A (en) * 1955-08-02 1958-05-06 Singer Mfg Co Work-presenting mechanisms for blindstitch sewing machines
US4043284A (en) * 1975-03-17 1977-08-23 J. Strobel & Sohne Gmbh & Co. Blind stitch sewing machine
WO1981001020A1 (en) * 1979-10-15 1981-04-16 Marshall E Design Int Ltd Improvements in sewing machines

Also Published As

Publication number Publication date
NL77432C (de)
BE479364A (de)
FR941623A (fr) 1949-01-17
GB571094A (en) 1945-08-07
DE806308C (de) 1951-06-14

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