US3012531A - Stitch adjusting device for sewing machines - Google Patents

Stitch adjusting device for sewing machines Download PDF

Info

Publication number
US3012531A
US3012531A US789656A US78965659A US3012531A US 3012531 A US3012531 A US 3012531A US 789656 A US789656 A US 789656A US 78965659 A US78965659 A US 78965659A US 3012531 A US3012531 A US 3012531A
Authority
US
United States
Prior art keywords
feed
shaft
stitch
dog
connecting rod
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
US789656A
Other languages
English (en)
Inventor
Wolfgang Engel
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.)
Phoenex Nachmaschinen A G
PHOENEX-NACHMASCHINEN AG
Original Assignee
Phoenex Nachmaschinen A G
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 Phoenex Nachmaschinen A G filed Critical Phoenex Nachmaschinen A G
Priority to US789656A priority Critical patent/US3012531A/en
Application granted granted Critical
Publication of US3012531A publication Critical patent/US3012531A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch

Definitions

  • the present invention relates to stitch adjusting devices for sewing machines, and is an improvement of the invention disclosed in applicants U.S. Patent No. 2,846,966.
  • stitch adjusting devices for sewing machines it is important inter alia to provide a zero work-feed setting sufiiciently accurate for practical purposes.
  • the stitch adjusting device should take up as little room as possible below the work supporting plate in the machine base, and it is also desirable to use the smallest possible moving masses for this stitch adjusting device, so that the sewing machine can be driven at a high speed.
  • a hook disposed transversely to the direction of feed of the material being worked and feed shaft situated at the side of the needle bar remote from the operator, wherein the feed shaft is driven by the hook drive shaft, which is disposed at the same side of the needle bar as the feed shaft, by Way of a cam and toggle lever arrangement comprising a cam arranged on the hook drive shaft and a substantially vertically arranged connecting rod between said cam and a substantially horizontally disposed toggle lever arrange-' ment, said cam and the associated toggle lever arrangement being disposed close to the transversely disposed hook shaft.
  • the connecting rod was articulated to the toggle joint pin of the toggle lever arrangement which comprised one element or link leading to the feed shaft and another element or link leading to stitch length adjusting means.
  • a stitch adjusting device for a sewing machine wherein feed movement for the material being worked is derived from a cam arranged on a hook drive shaft by way of a substantially vertically arranged connecting rod articulated to the toggle joint pin of a toggle lever arrangement comprising one link leading to a feed shaft, to provide the feed movement, and another link leading to stitch length adjusting means, these two links being both situated at the same side of the toggle joint pin and being operative, in a zero work-feed position of the adjusting means, to describe about their ends remote from the'toggie joint pin arcs which substantially coincide with one another in the region of movement of the toggle joint pin.
  • FIGURES l to 3 are diagrammatic views of'the stitch adjusting device in three different positions
  • FIGURE, 4 is a cut-away perspective view of part of a sewing machine comprising the device, showing in particular the driving mechanism associated with the device, and I FIGURE 5 is an exploded view of the device of FTG- URE 4.
  • FIGURE 1 shows the basic construction of the feed drive with the stitch adjusting device.
  • a double rocker consisting of two rockers 54 and 42 and a connecting rod 455 is pivotally mounted at a point 50 in the housing and at a point on an adjusting crank 33 which is pivotally mounted at a point 3% in the housing but is to be regarded first of all as being fixed in the illustrated position.
  • the rocker i2 and connecting rod 46 and their connecting pin 44 constitute a toggle lever arrangement.
  • the rocker 42 and connecting rod 46 are referred to hereinafter as links of such toggle lever arrangement.
  • FIGURE 2 shows the Zero-feed position into which the adjusting crank 38 has to be brought if the movement of the rocker 54 and therefore the feed of the work are to stop.
  • the lengths of the links 42 and 46 are so dimensioned that the curvatures of the arcs 19 and 20 which they described about the points 14 and 40, respectively, substantially coincide in the region of move ment of the pin 44.
  • FIGURES 4 and 5 shows the construction of the stitch adjusting device in more detail:
  • a hand lever 23 for stitch length adjustment.
  • the lever 23 is secured on one end of a shaft 25 which is rotatably mounted in a bearing 24 in the standard 22.
  • an arm 26 whose free end, by way of a ball joint 27, operates a connecting rod 28 which in its turn acts, by way of a ball joint 2?, on an arm 31 which is secured to a shaft 30.
  • pivoting movement of the hand lever 23 rocks the shaft 3%) and also a supporting extension 34 which is secured to the shaft by Way of a bridge 33.
  • the shaft 3% ⁇ and extension 34 rest in bearings 32.
  • a spring returns the shaft and therefore the hand lever 23 to the zero work-feed position after said lever has been released, as one end 36 of the spring is attached to the housing and the other end to a ring 37 fastened to the shaft 30.
  • Two arms 38 and 39 of the bridge 33 are represented in a symmetrical construction in FIGURES 1 to 3.
  • Also pivotally mounted on the pin 44 are a forked connecting rod 45 (as also indicated in FIGURES 1 to 3) and a link 45.
  • the fork of the connecting rod 45 consists of two arms arranged one at each side of the link 46.
  • the crank 48 of FIGURES 1 to 3 is embodied by the cam 43 which is fixed on the hook drive shaft 47 and on which the connecting rod 45 is mounted.
  • the link 46 transmits its movement, the production of which has already been described with reference to FIGURES 1 to 3, to a rocker 54 which is mounted fast on a feed shaft or dog advancing shaft 50 which extends between two pintles or hearing pins 49, such shaft being indicated as a fixed point 50 in FIGURES 1 to 3.
  • Mounted further forward on this feed shaft 50 are two lever arms 51 to which the feed dog 53 for feeding material to be worked is articulated symmetrically by means of a pin 52.
  • the links 42, 43 and 46 are of substantially the same length as one another. This promotes to a particularly satisfactory extent the coincidence of the corresponding arcs which they describe within the region of movement of the toggle joint pin.
  • a zig-zag sewing machine of the type having a machine base presenting front and rear longitudinal sides, a looper drive shaft disposed longitudinally of said base, a feed dog disposed transversely above and endwise of said looper drive shaft, a feed bar supporting said feed dog, a feed dog advancing shaft extending parallel to said looper drive shaft and rearwardly of said feed dog and feed bar and a rocking lever connecting said feed bar to said feed dog advancing shaft, a stitch setting mechanism having a setting member extending externally of the machine and including a setting shaft having one end linked to said setting member, a cam on said looper drive shaft, a connecting rod having one end in operative engagement with said cam and the other end in engagement with a link member of said stitch setting mechanism, a crank arm on said dog advancing shaft, and a toggle joint extending generally rearwardly of said setting shaft having a joint portion including a joint pin in engagement with said connecting rod, one arm in engagement with said crank arm, a pair of arms defining said link member of said stitch setting mechanism
  • a zig-zag sewing machine of the type having a machine base presenting front and rear longitudinal sides, a looper drive shaft disposed longitudinally of said base, a feed dog disposed transversely above and endwise of said looper drive shaft, a feedbar supporting said feed dog, a feed dog advancing shaft extending parallel to said looper drive shaft and rearwardly of said feed dog and feed bar and a rocking lever connecting said feed bar to said feed dog advancing shaft, a stitch setting mechanism having a setting member extending externally of the machine and including a setting shaft having one end linked to said setting member, a cam on said looper drive shaft, a connecting rod having one end in operative engagement with said cam and the other end in engagement with a link member of said stitch setting mechanism, a crank arm on said dog advancing shaft, and a toggle joint extending generally rearwardly of said setting shaft having a joint portion including a joint pin in engagement with said connecting rod, one arm in engagement with said crank arm, a pair of arms defining said link member of said stitch setting mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US789656A 1955-01-18 1959-01-28 Stitch adjusting device for sewing machines Expired - Lifetime US3012531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US789656A US3012531A (en) 1955-01-18 1959-01-28 Stitch adjusting device for sewing machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP13399A DE1000668B (de) 1955-01-18 1955-01-18 Stichstelleinrichtung fuer Naehmaschinen
US789656A US3012531A (en) 1955-01-18 1959-01-28 Stitch adjusting device for sewing machines

Publications (1)

Publication Number Publication Date
US3012531A true US3012531A (en) 1961-12-12

Family

ID=7364602

Family Applications (1)

Application Number Title Priority Date Filing Date
US789656A Expired - Lifetime US3012531A (en) 1955-01-18 1959-01-28 Stitch adjusting device for sewing machines

Country Status (5)

Country Link
US (1) US3012531A (fr)
CH (2) CH338685A (fr)
DE (2) DE1000668B (fr)
FR (2) FR1140539A (fr)
GB (2) GB781156A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232257A (en) * 1960-05-25 1966-02-01 Borletti Spa Control device for rotary hook and material-transporting claw in sewing machines
US3955517A (en) * 1975-09-18 1976-05-11 The Singer Company Drag link-type feeding mechanism
FR2467901A1 (fr) * 1979-10-24 1981-04-30 Union Special Corp Mecanisme d'alimentation pour machines a coudre
US4391216A (en) * 1980-11-06 1983-07-05 Union Special Corporation Feed mechanism for sewing machines

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093654B (de) * 1959-05-27 1960-11-24 Anker Phoenix Naehmaschinen A Stoffschieberantrieb fuer Naehmaschinen
DE19903264C1 (de) * 1999-01-28 2000-05-18 Duerkopp Adler Ag Gelenkgetriebe zur Erzeugung einer veränderbaren Schwingbewegung, insbesondere für den Antrieb des Stoffschiebers einer Nähmaschine
DE102010005106B4 (de) * 2010-01-19 2014-10-16 Xi'an Typical Europe Gmbh Nähmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641653C (de) * 1935-10-05 1937-02-10 Phoenix Naehmaschinen A G Baer Stoffschieber fuer Naehmaschinen
US2172559A (en) * 1939-09-12 Sewing machine
US2672112A (en) * 1952-07-28 1954-03-16 Singer Mfg Co Sewing machine feeding mechanism
US2681627A (en) * 1952-11-21 1954-06-22 Singer Mfg Co Feeding mechanism for sewing machines
US2846966A (en) * 1955-01-18 1958-08-12 Engel Wolfgang Zig-zag sewing machine with simplified material feed control gearing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT143015B (de) * 1933-10-03 1935-10-10 Singer Mfg Co Vorschubvorrichtung für Greifernähmaschinen.
US2119492A (en) * 1935-12-19 1938-05-31 Union Special Machine Co Feed mechanism for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172559A (en) * 1939-09-12 Sewing machine
DE641653C (de) * 1935-10-05 1937-02-10 Phoenix Naehmaschinen A G Baer Stoffschieber fuer Naehmaschinen
US2672112A (en) * 1952-07-28 1954-03-16 Singer Mfg Co Sewing machine feeding mechanism
US2681627A (en) * 1952-11-21 1954-06-22 Singer Mfg Co Feeding mechanism for sewing machines
US2846966A (en) * 1955-01-18 1958-08-12 Engel Wolfgang Zig-zag sewing machine with simplified material feed control gearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232257A (en) * 1960-05-25 1966-02-01 Borletti Spa Control device for rotary hook and material-transporting claw in sewing machines
US3955517A (en) * 1975-09-18 1976-05-11 The Singer Company Drag link-type feeding mechanism
FR2467901A1 (fr) * 1979-10-24 1981-04-30 Union Special Corp Mecanisme d'alimentation pour machines a coudre
US4391216A (en) * 1980-11-06 1983-07-05 Union Special Corporation Feed mechanism for sewing machines

Also Published As

Publication number Publication date
DE1000668B (de) 1957-01-10
GB781156A (en) 1957-08-14
DE1058820B (de) 1959-06-04
CH347417A (de) 1960-06-30
CH338685A (de) 1959-05-31
GB867725A (en) 1961-05-10
FR1140539A (fr) 1957-07-24
FR74612E (fr) 1960-12-26

Similar Documents

Publication Publication Date Title
US2755754A (en) Sewing machine with zigzag arrangement
US3012531A (en) Stitch adjusting device for sewing machines
US3368507A (en) Feeding mechanism for sewing machines
US2939414A (en) Sewing machines
US2667851A (en) Feeding mechanism for sewing machines
US3605662A (en) Upper feed mechanism
GB812298A (en) Improvements in or relating to stitch adjusting mechanisms for sewing machines
JP3673902B2 (ja) ミシンの送り装置
GB593613A (en) Feeding mechanism for sewing machines
US4539925A (en) Bi-directional feed dog mechanism for sewing machine
GB1002888A (en) Improvements in or relating to stitch control mechanisms for sewing machines
US5101748A (en) Feed dog drive for sewing machines
JP4036361B2 (ja) ミシンの送り装置
US3020865A (en) Sewing machine for producing variable stitches
US4213409A (en) Needle bar support
US1830126A (en) Zigzag-stitch sewing machine
US3018744A (en) Ruffling mechanisms for sewing machines
GB825337A (en) Feeding mechanism for sewing machines
US2974617A (en) Feeding mechanisms for sewing machines
CN218540010U (zh) 二重环缝圆筒台式缝纫机
US2681627A (en) Feeding mechanism for sewing machines
US2811940A (en) Looper control for sewing machines
US2619058A (en) Tissue feed-dog driving mechanism of sewing machines
US2058837A (en) Feed control for sewing machines
US2769416A (en) Feed control for shirring mechanism