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US1843197A - Feeding mechanism for sewing machines - Google Patents

Feeding mechanism for sewing machines Download PDF

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Publication number
US1843197A
US1843197A US88298A US8829826A US1843197A US 1843197 A US1843197 A US 1843197A US 88298 A US88298 A US 88298A US 8829826 A US8829826 A US 8829826A US 1843197 A US1843197 A US 1843197A
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US
United States
Prior art keywords
arm
eccentric
shaft
work
work supporting
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
US88298A
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English (en)
Inventor
Berger Joseph
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 Machine Co
Original Assignee
Union Special 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
Application filed by Union Special Machine Co filed Critical Union Special Machine Co
Priority to US88298A priority Critical patent/US1843197A/en
Application granted granted Critical
Publication of US1843197A publication Critical patent/US1843197A/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
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements

Definitions

  • the invention relates to new and useful improvements in feedlng mechanisms for sewing machines,' and more particularly to a feeding mechanism used inconnection with .so'as to provide a suspended arm around which the material being sewed can be placed.
  • the feeding mechanism and looper mechanism are located in the w'ork supporting arm,' and the actuating devices therefor extend through the supporting member or the vertical post.
  • An object of the present invention is to provide a machine of the type wherein the work supporting arm is-suspended from a depending vertical member, and wherein the arm is detachably connected to the lower end of said vertical member and contains the feeding mechanism and the looper mechanism which are'actuated by parts in the vertical member; the devices for connecting the parts in the vertical member to the feeding mechanism and the looper mechanism in the work supporting arm are supported by'a devta'chable arm, so that'said detachable arm and provide a feeding mechanism for-a work supthe immediate actuating mechanism for the feeding mechanism and the. looper mechanism can beassembled in said arm and attached to or'removed from the sewing ma- ;chine proper as aunit;
  • a further object of the invention is to porting arm of the above type wherein the actuating mechanism includes'parts mounted on a cross shaft located at the upper end of the detachable work supporting arm and directly beneath the vertical member which supports the same.
  • a still further object of the invention is to provide a machine of the above type wherein said stationary .cross shaft carries an oscillating sleeve for imparting the back 7 and forth movements to thefeed bar, and wherem a second osclllating sleeve 1s mounted on the first oscrllatmg sleeve for impartjing back and forth movements to the looper supporting shaft, said sleeves being oscillated by eccentrics on the main shaft directly above the parts to which they areconnected, said eccentrics being mounted on an actuating shaft extending, at an acute angle ing arm.
  • a further object of the invention is to pro vide a machine of the above type wherein the eccentric for moving the feed bar back and forth is capable of adjustment on an actuating shaft for the purpose of varying the stroke oifthe feed bar.
  • a further object of the invention is to provide amachine of the above type wherein the feed bar has a relatively wide end for supporting the feed dog so as to prevent any to the longitudinal axis of the work supportt-ilting or cramping of the parts during the feed operation.
  • a further object of the invention is to pro vide a feeding mechanism for a work sup illustration
  • one embodiment of the invention-- Figure l is a view partly in perspective and partly in section showing a machine embodying the improvements;
  • Fig. l is a view partly in side elevation and partly in section showing the detached work support-ing arm and the actuating devices for the feed and the looper as disconnected from the main actuating shaft;
  • Fig. 2 is a plan viewof the detached work supporting arm with the eccentric straps
  • Fig. 8 is a sectional view on the line 33 of Fig.2;
  • Fig. 1 is a sectional view on the line 4-41 ofFig.2;'
  • FIG. 5 is a perspective view of one of the eccentrlc plns for supporting and leveling the feed bar;
  • Fig. 6 is a sectional view on the line 66 ofF1g.1; Fig. 7 is a transverse sectional View through the upper end of the depending sup.- v
  • Thezinvention is directed broadly to a feeding ine'chanismfor a sewing machine havinga suspended work supportlngarm, andpref-V 'erably a machine'of the type shown in thev Patent No. 1,741,095, granted Christensen and Le Vesconte, Dec; 2 1," 1929.
  • the machine of the present application includes a supporting base or, frame 1 which is provided with an overhanging portion at the upper end to which the main frame 2 of the machine is integrally attached.
  • Thesupport- :mg base is attached'to said main frame at both ends thereof.
  • Located in thismain sup- 7 porting frame 2 is a main actuating shaft 3 which is driven by a belt wheel 1.
  • a depending member 10 (The At'the right-hand end of theframe supporting base 1, the frame 2, the de pending member 10, and a portion of the housing 5, areall cast as one integral piece.
  • the main shaft 3 is mounted in suitable bear- :ings, one of which is shown in section in Fig. 1 at 11.
  • the depending member 10 term inates on'theline wm (see Figures 1 and 6) Attached to the lower end of thisdepending member 10 is the work supporting arm 12.
  • Said work supporting arm 12 is substantiallycylindrical in form, and extends from a point directly beneath the vertical member 1 to a point beneath the needle bar 6. 'Inasmuch as the frame 2 is directly above the dependingmember 10, and the.
  • Fig. 8 is a sectional View on the line 8+8;
  • the work supporting arm extends all the way across the lower'end of the depending members and projects therefrom to provide a work supporting portion.
  • the work formed so as to feed the material ,offfrom the end of the work supporting arm.
  • Said feed bar atthe extreme left-hand end thereof is provided with a very much broadened'face 17.
  • the feed dog 16. has abroadened shank 18 which rests on this broadened face 17 of the feed bar, and said-shank is secured thereto by screws 19, 19. This makes agvery wide and durable support forthe feed dog.
  • the work supporting arm is provided with spaced faces 20, 20 between which the freeend ofthe feed bar reciprocatesbackandforth.
  • This feed bar 15 is mounted at itsv forward end on a swinging link 21 .”v
  • the feed bar is .pi'voted at22 to saidswinginglink.
  • the swing-V ing link in turn is pivoted at 23 to a lever 24,
  • this set screw 31' is released, and the operator, bythef aid of screw driver, can turn the eccentric pin so as 'to'raise or lower the free'e nd ofthe lever 24', and this in turn willraise or lower the free end of: the feed bar 15; i I V
  • the rear end of the feed bar is mounted on aswinginglink 32.
  • This swinginglink 32 is provided with two upwardly extending arms 33, 33 which extend on opposite sides of the fced'ba-r' 15, and are secured thereto by means of a pivot screw 34.
  • The'lowerend of the link is mounted on an eccentric pin 35 which feed bar can be raised and loweredlso as to ve-rtical'ly adjust"thelongitudinal axis of the V whi'ch have just been
  • Thefeed bar is'moved back and forthon is of the construction of the eccentric pin
  • Thiseccent'ric pin is held inadju'sted *positionsb'y a set screw '36.
  • the rear end of the feed bar can be raised or lowered.
  • the feed bar' may be either raised or lowered-at either end thereof, and one end maybe raisedwhile' the other end is lowered. This provides a means whereby the path of travel of the feed dog or so as to cline said axis.
  • the working position of the feeddcg can be varied, and
  • The: present machine is provided --with only one feed dog, and is] especially adapted for operating uponnon-elastic fabrics. Even non elastic-fabrics are sometnnes stretchable, and'itis-desired to incline the feed dog so as tolcrowdthe material forwardto avoid the materialfroni being stretched as it is stitched. On the other hand,it is some times desirable to inc line the feed dog in the oppositedirection so jas' to draw-the material away from the stitching point and prevent piickering or gathering of the same during-stitcliing. 'This can allbeaccomplished bythe adjustment of the two eccentric p ns described.
  • This sleeve 43 Clamped to this sleeve 43 is a split'col-la'r 44 with which said arm 4-0 is integrally formed.
  • a clamping jbolt 45 serves to attach said split collar to the 1 sleeve Said sleeve ,is'also provided with a l'ater'ally which an eccentric strap 47 is attached.
  • This 44E projecting arm 46"carrying a ballto eccentric strap 47' cooperates with an eccentric .4 8 on the mainshaft 3.
  • the main shaft 'rotates the' eccentric strap 47 will oscillate the sleeve 43, and. said oscillations of the sleeve 43, through the arm 40 and link 37, will move the feed bar back and forth.
  • the eccentric has a segmental recess 52 and a slot 53'leading from the bottom' of'said recess to the inner face of the ring.
  • screw 54 extends through said slot and is threaded into the sleeve 50. This accessible through an opensupport on the sleeve, and then the eccentric r the eccentric is supporting arm is a looper supporting shaft porting shaft 'ing 54 in the eccentric strap when th actu can be again secured in its adjusted position.
  • the bottom of the recess is formed about the pivot point 49 as a center.
  • eccentric 64 On the extreme right-hand end of the actuating shaft 3 there is an eccentric 64 with which an eccentric strap 65 cooperates.
  • a ball stud i 66 which is offset from the center of the shaft 3.
  • the upper end of the link 63 cooperates with this ball stud 66.
  • Attached to the ball stud atthe outer end thcreof is a rectangular block 67. Said block is secnred' 1 to the stud by a screw 68.
  • Attached to the link 63 is a'bracket 69, which is forked at the upper end and straddles said rectangular block 67. The purpose of this bracket is to prevent the link 63 from oscillating on the j ball studs to which it is attached.
  • This link 63 oscillates the looper shaft and causes the loopers to move into and out of the needle threadiloops.
  • Mounted on the looper supporting shaft are two spaced collars 7O and'125 71.. These collars are fixed to the looper supporting shaft. Between said collars is a sleeve 7:2 which is freely supported on the looper shaft.
  • Said sleeve has an upwardly projecting arm 73.
  • Links 74 are pivotally '7 5.
  • Said second sleeve connected to said arm at opposite sides thereof.
  • Mounted onthe sleeve 4L3 is afsecondsleeve is' freely mounted on the first-named sleeve and can oscillate there- .on.
  • Said second-named sleeve is provided with a depending arm -7 6, and the links 74:
  • a are pivotally connected at the other ends thereof with this depending arm 76.
  • Said sleeve? 5 has a laterally pro]ecti11garm 77 carrying a ball head strap 65 is connected.
  • the eccentric 64 on the main shaft 3 oscillates .the sleeve, and the sleeve, throughits connection with the looper supporting shaft, moves said shaft endwise in the work supporting arm. This impartsthe lateral or needle avoiding movements to; the loopers.
  • supporting shaft may feed bar and the looper su 3 ortin arm so said arm with the eccentric straps can be removed from the machine.
  • the feed bar, looper shaft and actuating devices therefor can all beassem'bled in the detached work supporting arm, after which the work supporting arm can be con- 3 nected to the main frame, the eccentric straps connected to the main actuating shaft, and
  • the material is elastic, and whereit is also anism.
  • main frame may be used asa standard.
  • frame machines of different types are possible.
  • ving arm is removable asi a unit, and anotherwork supporting arm with d fferent mechanism assembled.
  • a the depending member a stationary shaft. mounted insaid worksupmember,- a feed bargextending lengthwise of rsaid'work supportingarm, an, oscillating sleeve mounted onsaid .stationaryrshaft, an
  • said second sleeve having a second projecting arm, a'vertically reciprocating depending member and connectedto said second arm for oscillating the same-and 'eccentrically arranged inembersonsaid main shaft with which said vertically reciprocating members respectively cooperate whereby when said vertically reciprocatingmembersare detached from the eccentrically arranged members, said verti .cally reciprocating members together with the parts actuated-thereby and the work sup porting arm may be removed as a unit.
  • a sewing. machine ncluding a mam frame having a main operating shaft located the eccentric, said ring-shaped member having a segmental slot extending therethrough, and adaptedto engage said sleeve for holding said'ring in various adjusted positions on saidsleeve, for
  • said actu-' atlng' devices including an eccentric strap cooperating with said eccentric, said strap opening .therethrough, whereby said screw is accessible for adjusting the eccentric withoutremoving the eccentric strap.
  • a sewing machine including a main frameh'aving a main operating shaft located therein, said frame having a depending mom lo-er .'a work supporting arm connected to the lfowc end ofsaid depending member, feed barfientending lengthwisejof' said work suplowerendof said depending member, a feed bar including an eccentric on the main shaft, said eccentric including a ring-shaped member,'a sleevehaving a projecting lug to which said ringshaped, member is pivoted, said sleeve being fixed tothe actuating shaft for the eccentric,saidring-shaped member havi'nga se mentalslot extending therethrough, a screw ⁇ l'ecatedj-in; said slot and ada-ptedto engagesaid sleeve for holding said ring in variousadjusted positionson said sleeve, for
  • said lever is means accessible from theoutside of said i work supportlng arm for adjusting said ccvarying the throw of said eccentric
  • said actuating devices including an eccentric strap cooperating with said eccentric, said strap having an opening therethrough, whereby said screw is accessible foradjusting the eccentric without removing the eccentric strap, said eccentric having radial grooves formed in the side face thereofto aid in the positioning of the eccentric during the adjustment thereof.
  • a feeding mechanism for sewing machines includfeed bar in said arm extending longitudinally thereof, a feed dog carried by said feed bar, means for supporting said feed bar whereby the same may be moved endwise of the work supporting arm, said supporting means including eccentric members accessiblc from the outside of the work supporting arm whereby said feed bar may be raised or lowered at either end thereof.
  • A. feeding mechanism for sewing machines comprising a work supporting arm,
  • a feed dog carried thereby, swinging members located adjacent the opposite ends of said feed bar for supporting the same, whereby said feed bar may be moved lengthwise of the work supporting arm, an eccentric member for supporting each swinging member, accessible from the outside of the work supporting arm, and adjustable whereby said feed bar may be raised or lowered at either end thereof.
  • a feeding mechanism. for chines comprising a feed member extending, lengthwise ofsaid sewing mawork supporting arm, a. feed dog carried:
  • centric member means for holding the eccentric member in adjusted position whereby the forward end of the feed bar may be raised or lowered, a swinging member for supporting the rear end of said feed bar, means connected to the feed bar for moving the same endwise, an eccentric member for supporting said swinging member, mean-s accessiblefrom the outsidc'of said work supporting arm for adjusting said last-named eccentric member,
  • a sewing machine including a main frame having a depending member'open at its lower end, a work supporting arm con nected to said depending member and closing the lower end thereof, a: feed bar extending lengthwise of said work supporting arm, a looper shaftezitending lengthwise of said work supporting arm, a lever for raising 1;; a work supporting arm, a-
  • the said members operated being connected'jto one of said recipr rojcat ng' def' es "in salid depending member, and'means operated by the other reciproeating.
  • device insaid depending member for raising and loweringsaidfced bar, all of eating :devices in the depending member being mounted in said work supporting arm whereby "the'feedi'n'g mechanism maybe assembled in said work supporting arm 1 and said arm subsequently connected to said fdepending member.
  • a sewing machine including a main frame having a'dependm'g inember open at its lower end, ai'worlrsupporting arm extending at right angles to said depending memdetachably connecting said work supportingarm'to the lower end of said depending member, a feeding mechanism located in said work supporting arm including a feed bar,a rocker feed bar b'aclrandforth and ing and "lowering saidflfeedbar, all of; said ber, means for parts of the feeding mechanismbeing mounted inand removablewithsaid worlrsiipporting arm, armain sh aft 'mounted'in saidframe at the upperend of said depending member,
  • a sewing machine including a main frame having adependmg' member open at its lower end, a wor angles to saiddepending member,
  • a feeding mechanism located in said work supporting arm including feedbar, a rocker for moving said feed bar baclrandforth and a lever for raising and lowering said feed bar, alliof said, parts'of the feeding mechanism beingnn'iu'nted in and re movable with said work supporting.arm,a
  • a sewing machine including a main frame having a depending member open at its lower end, a work supporting arm extending at right angles to said depending member, means for detachably connecting said work supporting arm to thelower end of said depending member, a feeding mechanism located in said work supporting arm including a feed bar, a rocker for moving said feed bar back and forth and a lever for raising and lowering said feed bar, I feeding mechanism being mountedin and removable with said Work supporting arm, a main shaft mounted in said frame at the up per end of said depending member, an eccentric mounted on the main shaft, an eccentric strap cooperating therewith and connected to the rocker in said work supporting'arm, a second eccentric on said main shaft and an ec- 1 centric strap cooperating therewith and connected to the lever in said work supporting shaft and: the work-supporting; arm, with v the member and connected to allof said parts of the arm, a looper shaft mounted in said work supporting arm, a looper carried by said shaft at the free end thereof, the other end of said looper shaft terminating beneath said depending member
  • a sewing machine including a main frame having a dependingmember open at its lower end, a work supporting arm extending at right angles to said: depending member, means for detachably connecting said work supporting arm tot-he lower end of said depending member, a feedingmechanism located in said work supporting armincluding a feed bar, arocker for moving said feed bar back and forth and a lowering said feed bar, all of said parts of the feedingmechanism being mounted in and removable with said worksupporting arm, a main shaft mounted in said frame at theupper end of said depending member, an eccentric mounted onthe main shaftgan eccentric strap cooperating therewith and connected to the -rocker insaid work supporting arm, a second eccentric on eccentric strap cooperating therewith and connected-to-the lever in said work supportat the free end thereof, the other end of said loopershaft terminating beneath said depe11ding-cmember and having acrank thereon, a rocking member mounted.
  • ecur- 16FAsewing machine incliulin'g a main frame having a depending member open at its lo v'ver encha main shaft in themain frame having a plurality of eccentric members located directly oversaid depending D1611'1l3B1,' L Work supporting arm extending at right anand having a and fitting the:
  • the Work supporting arm may ibe; re-
  • a sewing machine including main frame, a depending member openingdoWn- ⁇ vardly at'its lower end, a Worksupporting nected to the lower end ofsaid depending member and extending substantiallygat right angles to said depending member, means for detachably connecting said Worksupporting arm to said depending member, aie'eding mechanism located in sald Work i supporting v arm, a looper' mechanism located in" said the actuated parts disposed 'in said dependsaid Work supso that the ver-f I passing longitu'dinally through 5 a Work supporting arm, a' main actuating shaft located in said main frame at the upperend of" said depending inember, ⁇ the actuated parts of the feeding mechanism and looper and looper mechanism det (3-011:
  • Asewing machine including a main framehaving a depending member opening downwardly at its lower, end, a work.
  • sup-, 5 porting arm located beneath: anddetachably conlnectedto the-lower end of said depend ing member and-extending at right angles to said depending member, means 'fOr detaclP ably connecting 'said work supporting arm 5 tosaid depending member, a feeding mechanism.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US88298A 1926-02-15 1926-02-15 Feeding mechanism for sewing machines Expired - Lifetime US1843197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US88298A US1843197A (en) 1926-02-15 1926-02-15 Feeding mechanism for sewing machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88298A US1843197A (en) 1926-02-15 1926-02-15 Feeding mechanism for sewing machines
GB32059/26A GB280056A (en) 1926-12-18 1926-12-18 Improvements in feeding mechanisms for sewing machines

Publications (1)

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US1843197A true US1843197A (en) 1932-02-02

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US (1) US1843197A (fr)
FR (1) FR626269A (fr)
GB (1) GB280056A (fr)

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FR626269A (fr) 1927-09-02
GB280056A (en) 1927-11-10

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