US3094086A - Control mechanism for zig-zag sewing machines - Google Patents

Control mechanism for zig-zag sewing machines Download PDF

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Publication number
US3094086A
US3094086A US80596A US8059661A US3094086A US 3094086 A US3094086 A US 3094086A US 80596 A US80596 A US 80596A US 8059661 A US8059661 A US 8059661A US 3094086 A US3094086 A US 3094086A
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US
United States
Prior art keywords
eccentric
zig
axis
needle
zag
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
US80596A
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English (en)
Inventor
Meier Gunther
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.)
Gritzner Kayser AG
Original Assignee
Gritzner Kayser AG
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 Gritzner Kayser AG filed Critical Gritzner Kayser AG
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Publication of US3094086A publication Critical patent/US3094086A/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
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the control eccentric for changing the over-stitch width is conically constructed and axially displaceable relative to the follower.
  • the production .of straight seams is effected in that position of the swinging frame'of theneedle bar wherein the follower is out of engagement with the eccentric.
  • the said devices occupy considerable space and cannot be fitted within the. housing of the sewing machine.
  • the arrangement thereof on the side of the horizontal upper arm facing the operator gives the sewing machine an unsightly appearance and continuously exposes the devices to soiling and damage.
  • devices fitted. on the outside of'the upper arm prevent the operator from obtaining a clear and close view of the sewing situation.
  • the object of the present invention is to so construct the device for controlling the needle bar rocker that it not only can be fitted within the housing of the sewing machine but also will permit infinitely variable adjustment of the overstitch width, so that buttonholes of different widths can be completed.
  • control eccentric together with means for axial displacement of the follower relative to the control eccentric and also thedrive for the control eccentric, as a unitary structure so that it can be introduced as a whole into'the housing of the machine from outside.
  • a very simple .means forSthe infinitely variable adjustment of the-overstitch'width and the edge width of buttonholes consists in a control eccentric which has a circumference of three surfaces inclined towardsitsaxis of rotation and a further generated surface in the form of a straight cir- :cular "cylinder, the .radius..of .which corresponds to the maximum distance of the generated surface from the axis of rotation, whilst, of the said three inclined surfaces, the incline of one surface corresponds to the direction of a tangent which is located on the line of transition from the inclined surfaces control eccentric to the straight circular cylinder to an are having the mounting point of the link or follower on the needle bar rocker as its centre and the length of the follower as its radius.
  • a further feature of the invention involves the use of a cylindrical housing for the device which consists of upper and lower parts, two bearings being provided, one fora spindle constituting an axis of rotation of the eccentric and the other for an adjusting pin for the follower.
  • FIGURE 1 is a perspective view partly in section of a sewing machine having a fitted device for producing simple straight seams and zig-zag seams.
  • FIGURE 2 is a front elevation partly in section of the device when fitted to a sewing machine.
  • FIGURE 3 is a section on the line II-II of FIGURE 2.
  • FIGURE 4 is a perspective view of the control eccentric.
  • the sewing machine as a whole is indicated by the reference 1.
  • a bevel gear 3 which drives, at a gear ratio of 1:2, a spur bevel gear 4 which is rigidly connected to an eccentric 5 and constitutes a member ofa-drive transmission therefor.
  • the needle bar 6 of the machine besides having imparted to it in a known manner a reciprocating up and down movement by the shaft 2, has lateral deflections imparted to'it by.the eccentric 5, through a link or follower 7 and a rotatably journalled frame or rocker 8.
  • the eccentric 5 is supported on a spindle for rotation about the axis 9 of the spindle and at one end has a periphery 10 whichis composed ofa generated surface 11 corresponding to a straight circular cylinder, the radius of which is equal to the maximum distance of the circumference 10 fromthe spindle axis 9.
  • the periphery 10 of the eccentric 5 also comprises three arcuate surfaces 12, 13, 14 which are inclined-towards the spindle axis 9, and merge at the point of transition indicated by the curved line 15 into the generated surface 11.
  • the inclined surface 14 which constitutes the connection between the other ends .of the inclined surfaces 12 and 13, is bisected by the plane 17 and extends over its entire length concentrically to the spindle axis 9.
  • a cylindrical casing 21 or support which consists of two parts constituted by a rotatably adjustable cover 22 and a lower cylindrical part 23. 'The casingzl is secured by means of a screw 26 ina vertical bore 25 :formed in the arm 24 of the sewing machine.
  • the lower part 23 of the casing 21 has a base 27, in the centre of which a bearing28 having a bore 29 is provided for the spindle 9.
  • the spindle 9 is secured at its other end in the cover 22, and rotatably supports, outside the casing 21 the already mentioned eccentric 5. The latter is protected against axial displacement, on the one hand, by the base 27 and, on the other hand, by a retaining washer 30.
  • a second bearing 31 provided in the base 27 has a bore 32 in which an adjusting pin 33, which extends parallel to the spindle axis 9, is displaceably mounted.
  • the bearing 31 is surrounded by a coiled spring 34, one end of which bears against a retaining washer 35 secured to the adjusting pin 33.
  • the upper end of the adjusting pin 33 is constructed as a ball socket 36 in which a ball 37 is seated for cooperation with the lower and inclined face of an annulus 38 which is provided intertrically about the spindle axis 9.
  • the adjusting pin 33 in the region of its lower end has a groove 39, in which the follower 7 slotted at 40 is hooked.
  • the follower 7 has a bearing portion 41 on one end and a fork 42 on the other.
  • the fork 42 engages in a groove 43 of a hinged or shackle bolt 44 which is secured to the needle bar rocker 8.
  • the bearing portion 41 of the follower 7 is drawn by a spring 45, which is hooked in the lower part 23 of the casing 21 and in a. second groove 46 of the bolt 44, against the generated surface 10 of the eccentric 5.
  • the position of the bearing part 41 which is influenced by the inclined face of the annulus 38 by way of the adjusting pin 3'3 located parallel to the spindle axis 9, can be read on a scale 47 disposed on the adjustable cover 22 of the casing 21 opposite a pointer 48.
  • the needle bar rocker 8 displaced, i.e. it is swung by the surfaces 12 and 13 to the right and back again, while during contact with the surface 14 it is kept in the extreme left position.
  • the deflection of the needle bar rocker 8 is reduced as the bearing member 41 approaches the generated surface 11 and becomes greater, the further it is pushed away therefrom.
  • the bearing part 41 of the follower 7 is adjusted to contact generated surface 11, but for sewing zig-Zag stitches, the follower 7 is brought into contact with the inclined surfaces 12, 13, 14, whereupon the scale 47 indicates the overstitch width.
  • control mechanism for selectively producing straight stitches and zig-zag stitches of gradually variable amplitude comprising a three-dimensional control member with means to rotate the same by said drive means, said member being composed of a circular cylindrical portion concentric with its axis of rotation and an eccentric conical portion adjoining said cylindrical portion, said eccentric portion including three angular partial surfaces being inclined towards said axis and merging into each other, one of said surfaces having a circular arc-shaped cross-section concentric to said axis and the surfaces adjoining said first surface having eccentric cross-sections symmetrical to the center line of said arc-shaped crosssection, a spring-urged follower link disposed transversely to said axis and having one end operably connected to said bar, to oscillate the same, and arranged with its opposite end bearing against said member, means to adjust the bearing point of
  • a housing enclosing said needle bar, said drive means and said link, said adjusting means being comprised of a spring-loaded pin connected to said link at a point therof adjoining said member, and control means relatively slidably supporting said pin by said housing in a direction parallel to said axis.
  • a housing enclosing said needle bar, said drive means and said link, said adjusting means being comprised of a spring-loaded pin connected to said link at a point thereof adjoining said member, means relatively slidably supporting said pin by said housing in a direction parallel to said axis, an adjusting member rotatably mounted upon and projecting from said housing, said adjusting member having a camming surface engaging said pin, and cooperating scale and index means upon said ad justing member and housing to indicate the adjusting position of said link.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US80596A 1960-01-05 1961-01-04 Control mechanism for zig-zag sewing machines Expired - Lifetime US3094086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG28748A DE1126225B (de) 1960-01-05 1960-01-05 Naehmaschine mit Einrichtung zur Erzeugung von einfachen Geradeaus-Naehten und von Zickzack-Naehten

Publications (1)

Publication Number Publication Date
US3094086A true US3094086A (en) 1963-06-18

Family

ID=7123568

Family Applications (1)

Application Number Title Priority Date Filing Date
US80596A Expired - Lifetime US3094086A (en) 1960-01-05 1961-01-04 Control mechanism for zig-zag sewing machines

Country Status (6)

Country Link
US (1) US3094086A (de)
BE (1) BE598835A (de)
CH (2) CH380502A (de)
DE (1) DE1126225B (de)
GB (1) GB962668A (de)
NL (1) NL259700A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156205A (en) * 1962-04-26 1964-11-10 Pfaff Ag G M Sewing machine mechanism for decorative stitching
US3911754A (en) * 1973-02-07 1975-10-14 Tarex Manurhin S A Fabrique De Control device of an oscillating element of a machine-tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196416A (en) * 1936-02-01 1940-04-09 Johnson Lab Inc Cam construction
US2621495A (en) * 1947-10-02 1952-12-16 Sperry Corp Coupling to produce rotary displacement between a driving member and a driven member
US2788677A (en) * 1956-01-31 1957-04-16 Gen Precision Lab Inc Three dimensional cam follower
US2817248A (en) * 1953-05-19 1957-12-24 Maschf Augsburg Nuernberg Ag Double cam
US2971482A (en) * 1955-06-02 1961-02-14 Nippon Sewing Machine Mfg Co L Automatic zigzag-stitch sewing machine
US2979002A (en) * 1956-02-18 1961-04-11 Mefina Sa Sewing machines
US3043253A (en) * 1956-06-18 1962-07-10 Ankerphoenix Nahmaschinen A G Zigzag and buttonhole sewing machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE382938C (de) * 1922-01-08 1923-10-08 Kochs Adler Ag Zickzack-Schnellnaehmaschine mit gleichfoermig umlaufendem Greifer
DE905915C (de) * 1951-04-05 1954-03-08 Emil Woeckel Steuerungsgetriebe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196416A (en) * 1936-02-01 1940-04-09 Johnson Lab Inc Cam construction
US2621495A (en) * 1947-10-02 1952-12-16 Sperry Corp Coupling to produce rotary displacement between a driving member and a driven member
US2817248A (en) * 1953-05-19 1957-12-24 Maschf Augsburg Nuernberg Ag Double cam
US2971482A (en) * 1955-06-02 1961-02-14 Nippon Sewing Machine Mfg Co L Automatic zigzag-stitch sewing machine
US2788677A (en) * 1956-01-31 1957-04-16 Gen Precision Lab Inc Three dimensional cam follower
US2979002A (en) * 1956-02-18 1961-04-11 Mefina Sa Sewing machines
US3043253A (en) * 1956-06-18 1962-07-10 Ankerphoenix Nahmaschinen A G Zigzag and buttonhole sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156205A (en) * 1962-04-26 1964-11-10 Pfaff Ag G M Sewing machine mechanism for decorative stitching
US3911754A (en) * 1973-02-07 1975-10-14 Tarex Manurhin S A Fabrique De Control device of an oscillating element of a machine-tool

Also Published As

Publication number Publication date
GB962668A (en) 1964-07-01
CH388080A (de) 1965-02-15
DE1126225B (de) 1962-03-22
NL259700A (de)
CH380502A (de) 1964-07-31
BE598835A (fr) 1961-05-02

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