US2883951A - Device for actuating the needle bar of zig-zag sewing machines - Google Patents

Device for actuating the needle bar of zig-zag sewing machines Download PDF

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Publication number
US2883951A
US2883951A US496512A US49651255A US2883951A US 2883951 A US2883951 A US 2883951A US 496512 A US496512 A US 496512A US 49651255 A US49651255 A US 49651255A US 2883951 A US2883951 A US 2883951A
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US
United States
Prior art keywords
needle bar
actuating
zig
slide
fork
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
US496512A
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English (en)
Inventor
Amman Giuseppe
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.)
Flii Borletti D P A
FRATELLI BORLETTI DPA
Original Assignee
Flii Borletti D P A
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 Flii Borletti D P A filed Critical Flii Borletti D P A
Application granted granted Critical
Publication of US2883951A publication Critical patent/US2883951A/en
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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

Definitions

  • the actuating unit swinging the needle bar usually comprises several universal joints and a slide which operate through a swinging rod to impart a side-to-side pendulum motion to the needle bar.
  • the present invention relates to a device for actuating the needle bar of zig-zag sewing machines which tends to eliminate these disadvantages.
  • This device is characterized by the fact that linkages formed by springs connecting the means for supporting the needle bar and for longitudinally trailing the needle bar with respect to the parts in relation to which said means are subjected to small rotary oscillations during the double movement of transversal swinging and axial displacement of the needle bar, are associated with supporting means of the fork controlling the swinging of said bar, said means consisting of a slide movable in two interspaced holes.
  • Fig. 1 is a longitudinal section of the arm of a zigzag sewing machine containing a needle bar which is adapted to swing like a pendulum about a horizontal axis, together with its actuating device.
  • Fig. 2 shows in plan view a detail of the mechanism for imparting the swinging movement of the needle bar.
  • Fig. 3 is a front view of the arm, partially in section showing the connection of the member trailing the needle bar in axial movement to the crank shaft actuating the said member.
  • Fig. 4 is a section through the broken line A-A of Fig. 1.
  • Fig. 5 shows in front view a modification of the mounting of a needle bar swinging about a vertical axis parallel thereto
  • Fig. 6 is a section about the line B-B of Fig. 5.
  • a support 1 of a needle bar 2 is connected to the head of an arm 3 of the machine by means of a leaf spring 4, said spring being fixed to said support by means of a screw 5 and to said arm by means of a screw 6.
  • the support 1 is connected to a rod 7, the latter being adapted under 2,883,951 Patented .Apr. 28, 1959 Ice the action of a leaf spring 8 to swing said support from the position X-X to the position Y-Y and vice versa.
  • the spring 8 is fixed to the support by means of a screw 9 and to the rod by means of screws 10 and 11.
  • rod 7 receives its swinging movement in known manner from a stem 12' of a fork 12 to which it is fixed, said fork being actuated by a cam 13 fixed on a vertical shaft 14 driven by a main shaft 15 of the machine.
  • the fork 12 has at its mid portion a cylindrical boss with a vertical hole therein.
  • a pivot pin 18 parallel to camshaft 14 is journalled in the hole, and has therethrough a hole in which is positioned a slide rod 16.
  • the boss of the fork has, in the sides thereof, oval holes 19 through which the slide rod 16 extends. This arrangement permits the fork to oscillate about the pivot pin 18, and thus it oscillates with respect to the longitudinal axis of the slide rod 16, also.
  • a screw 18' secures the pivot pin 18 to the slide rod 16, and the slide rod 16 is supported near its ends in two spaced guiding elements 17, which define the axis Z-Z that is at an oblique angle to the line joining the centers of shaft 14 and pivot pin 18.
  • the member 20 is connected to a crank pin 24 carried by the driving shaft 15 by means of a leaf spring 25 acting thus as a link, said spring being fixed by means of a screw 27 to the member 20 rotatably mounted on the pin 24 and acting as a link head.
  • a support 29 of a needle bar 30 is connected to an arm 31 of the sewing machine by means of two leaf springs 32 fixed to the support 29 by means of screws 33 and fixed to the arm 31 by means of screws 34.
  • the support 29 can swing about a vertical axis parallel thereto, which intersects the axes of the two screws 34. The operation is otherwise the same as that described with reference to Figs. 1 to 4.
  • a zig-zag sewing machine having an arm having a free end, a head carried by the free end of the arm, a main shaft horizontally mounted in said arm, a needle bar support, leaf spring means connected to said needle bar support and to the head for mounting the needle bar support in said head for lateral swinging movement relative to the head, a needle bar mounted in said needle bar support for axial reciprocation in a general vertical direction, a crank pin eccentrically carried by the main shaft, driving means carried by the needle bar for transmitting axial reciprocating motion thereto, a second leaf spring in the form of a connecting rod, means connecting one end of the second leaf spring to the driving means on the needle bar and means connecting the other end of the second leaf spring to the crank pin for transmitting rotary movement of the crank pin about the axis of the main shaft into axial reciprocating motion of the needle bar, a vertical cam shaft mounted in said arm and driven by the main shaft, a cam on the cam shaft, :1 link, a fork on one end of the link engaging the cam, a slide carried
  • a sewing machine further comprising a boss carried by the fork and having an opening through which the slide extends, said opening being of oval cross section and the slide being of circular cross section to enable the fork and slide to have angular play between them.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US496512A 1954-03-30 1955-03-24 Device for actuating the needle bar of zig-zag sewing machines Expired - Lifetime US2883951A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT330784X 1954-03-30

Publications (1)

Publication Number Publication Date
US2883951A true US2883951A (en) 1959-04-28

Family

ID=11236316

Family Applications (1)

Application Number Title Priority Date Filing Date
US496512A Expired - Lifetime US2883951A (en) 1954-03-30 1955-03-24 Device for actuating the needle bar of zig-zag sewing machines

Country Status (4)

Country Link
US (1) US2883951A (enrdf_load_stackoverflow)
BE (1) BE535966A (enrdf_load_stackoverflow)
CH (1) CH330784A (enrdf_load_stackoverflow)
GB (1) GB769358A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036534A (en) * 1958-10-17 1962-05-29 Louis Rich Machine Corp Apparatus for sewing on buttons
DE1132417B (de) * 1959-06-06 1962-06-28 Kochs Adler Ag Naehmaschine
US3460498A (en) * 1967-02-03 1969-08-12 Janome Sewing Machine Co Ltd Needle-bar-moving speed changing mechanism for a sewing machine
US3795207A (en) * 1972-05-06 1974-03-05 G Tolle Mechanism for laterally vibrating the needle of a zigzag sewing machine
US6058862A (en) * 1997-11-27 2000-05-09 Brother Kogyo Kabushiki Kaisha Link-member swinging apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572039A (en) * 1896-11-24 willcox
US2664058A (en) * 1950-04-07 1953-12-29 Flii Borletti Societa Per Azio Zig-zag stitch adjusting means
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
FR1087650A (fr) * 1952-11-21 1955-02-25 Fridor Fabrieken Nv Machine à coudre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572039A (en) * 1896-11-24 willcox
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
US2664058A (en) * 1950-04-07 1953-12-29 Flii Borletti Societa Per Azio Zig-zag stitch adjusting means
FR1087650A (fr) * 1952-11-21 1955-02-25 Fridor Fabrieken Nv Machine à coudre

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036534A (en) * 1958-10-17 1962-05-29 Louis Rich Machine Corp Apparatus for sewing on buttons
DE1132417B (de) * 1959-06-06 1962-06-28 Kochs Adler Ag Naehmaschine
US3460498A (en) * 1967-02-03 1969-08-12 Janome Sewing Machine Co Ltd Needle-bar-moving speed changing mechanism for a sewing machine
US3795207A (en) * 1972-05-06 1974-03-05 G Tolle Mechanism for laterally vibrating the needle of a zigzag sewing machine
US6058862A (en) * 1997-11-27 2000-05-09 Brother Kogyo Kabushiki Kaisha Link-member swinging apparatus

Also Published As

Publication number Publication date
CH330784A (it) 1958-06-30
GB769358A (en) 1957-03-06
BE535966A (enrdf_load_stackoverflow)

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