US3481291A - Device for temporarily interrupting stitch formation in automatically controlled embroidering machines - Google Patents

Device for temporarily interrupting stitch formation in automatically controlled embroidering machines Download PDF

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Publication number
US3481291A
US3481291A US739082A US3481291DA US3481291A US 3481291 A US3481291 A US 3481291A US 739082 A US739082 A US 739082A US 3481291D A US3481291D A US 3481291DA US 3481291 A US3481291 A US 3481291A
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US
United States
Prior art keywords
needle
needle bar
actuator ring
automatically controlled
stitch formation
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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
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US739082A
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English (en)
Inventor
Jurgen Schilling
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Individual
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Individual
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Publication date
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Publication of US3481291A publication Critical patent/US3481291A/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B81/00—Sewing machines incorporating devices serving purposes other than sewing, e.g. for blowing air, for grinding

Definitions

  • the needle bar is rotatable through substantially a right angle in a dog imparting reciprocating motion to said needle bar which is slidable in an actuator ring for rotating said needle bar.
  • This actuator ring is turnable by the plunger of a solenoid against the resistance of a spring which restores said actuator ring and said needle bar into their normal positions.
  • the present invention provides a device for temporarily interrupting stitch formation in automatically controlled embroidering machines having a rotary looper which enters the thread loop formed by a needle fitted to the free end of a reciprocating needle bar, said device comprising a needle bar, a needle fitted to one end of said needle bar, a dog engaging said needle bar and imparting reciprocating motion thereto, an actuator ring for guiding said needle bar and rotating it about its axis through an angle of about 90, a solenoid for rotating the actuator ring, and a tension spring for restoring said actuator ring and said needle bar into their normal positions.
  • Rotation of the needle bar carrying the needle prevents the looper from entering the thread loop and from forming a stitch.
  • the actuator ring For returning the needle to its working position the actuator ring is connected to a torsion or tension spring. Substantially no wear is caused by the rotation of the needle through Rotation can be imparted to the actuator ring by energizing the solenoids by means of the Jacquard card which controls the machine.
  • Thick gauge needles are formed with a transverse groove across the needle eye. The looper moves through this groove when it enters the thread loop. Rotation of such a needle would cause the needle to move into the range of the looper. This can be avoided by inserting the needle eccentrically into the needle bar in such a way that rotation of the needle bar will carry the needle out of range of the looper.
  • FIG. 1 is an elevational view of a needle bar
  • FIG. 2 is a section taken on the line II--II of FIG. 1 but with the needle bar in raised position;
  • FIG. 3 is a top plan View of the needle bar
  • FIG. 4 is a side view, of an enlarged scale, of a looper and a thicker needle formed with a transverse groove;
  • FIG. 5 shows the eccentric location of the needle in the needle bar in stitch forming position
  • FIG. 6 shows the eccentrically fitted needle in nonstitch-forming position.
  • FIGS. 1 and 2 show a needle 1 and a looper 2 of an embroidering machine the movements of which are synchronized to enable the point 3 of the looper 2 to enter the loop of the upper thread formed by the needle 1.
  • the looper 2 rotates in the arrowed direction 4.
  • the needle 1 is attached to a needle bar -5 which reciprocates vertically, a movement which is imparted thereto by a dog 6 at the end of an arm 9 which derives reciprocatory motion in the direction of the double-headed arrow 10 from the main shaft of the embroidering machine.
  • the needle bar 5 and the needle 1 are rotatable about their axis through approximately a right angle. This rotation moves the thread loop of the needle 1 out of range of the looper 2 so that no stitch can be formed.
  • the dog 6 is provided with a slot 11 engaged by a pin 12 fitted into the needle bar 5.
  • the needle bar 5 can rotate in the dog 6 whilst continuing to be entrained thereby for up and down movement.
  • an actuator ring 13 is loosely mounted on the needle bar 5.
  • This actuator ring 13 contains a pin 15 engaging in a slot 14 in the needle bar 5.
  • the actuator ring 13 is operable by the plunger of a solenoid 16 adapted to rotate the actuator ring 13 through an angle of about 90 by one or more interposed links 17.
  • a tension spring 18 is adapted to turn back the actuator ring 13 into its normal position.
  • a pin 19 connects the links 17 to the actuator ring 13 and is thus movable from position a into position b.
  • the pin 15 engaging the slot 14 thus permits the needle bar 5 to be rotated and to be moved to and fro into practically any desired position.
  • the solenoid 16 is preferably energized by pulses triggered by the Jacquard card controlling the embroidering machine.
  • Thicker needles 11 are formed with a transverse indentation 20 as shown in FIGS. 4, 5 and 6. If the needle bar 5 fitted with such a thicker needle 1a were turned through an angle of 3 roughly 90 the point 3 of the looper 2 which moves on the line 7 in FIGS. 5 and 6, would foul the solid part of the stern of the needle 1a. Consequently this needle 1a is eccentrically fitted to the needle bar 5.
  • FIG. 5 shows the working position and FIG. 6 the nonstitch forming position after the needle bar 5 has been turned through roughly a right angle in the direction of arrow 8.
  • Jacquard card means control the operation of said machine and means connecting said solenoid to said Jacquard card means whereby said solenoid is energized by pulses trig gered by said Jacquard card means.
  • a device mount said needle in the lower end of said needle bar in an eccentric position to the axis of said needle bar, a transverse indentation across the shank of said needle whereby the looper will clear the needle shank when said needle bar and needle are rotated from their normal positions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US739082A 1967-07-03 1968-06-21 Device for temporarily interrupting stitch formation in automatically controlled embroidering machines Expired - Lifetime US3481291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0074603 1967-07-03

Publications (1)

Publication Number Publication Date
US3481291A true US3481291A (en) 1969-12-02

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ID=7315779

Family Applications (1)

Application Number Title Priority Date Filing Date
US739082A Expired - Lifetime US3481291A (en) 1967-07-03 1968-06-21 Device for temporarily interrupting stitch formation in automatically controlled embroidering machines

Country Status (3)

Country Link
US (1) US3481291A (fr)
DE (1) DE1685138A1 (fr)
FR (1) FR1570385A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195583A (en) * 1978-04-24 1980-04-01 The Singer Company Releasing mechanism for cam followers in a zigzag sewing machine
US4241677A (en) * 1976-12-07 1980-12-30 Velva Ag Two needle sewing machine
US4473018A (en) * 1982-09-16 1984-09-25 Aisin Seiki Kabushiki Kaisha Needle bar selection device for a multiple needle sewing machine
US4608937A (en) * 1982-02-04 1986-09-02 Janome Sewing Machine Co., Ltd. Device for stabilizing stitches in a sewing machine
US5664511A (en) * 1995-03-14 1997-09-09 Tokai Industrial Sewing Machine Co., Ltd. Thread cutter and drive unit for a chain stitch sewing machine
CN1049940C (zh) * 1995-03-14 2000-03-01 东海工业缝纫机株式会社 链式线迹缝纫机的纱线切断装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US386837A (en) * 1888-07-31 litchfield
US593733A (en) * 1897-11-16 Machine
US1474269A (en) * 1919-07-26 1923-11-13 William F Lautenschlager Sewing machine
US2018456A (en) * 1931-06-20 1935-10-22 Jonas Hans Embroidering or like machine
US2889792A (en) * 1954-06-08 1959-06-09 Spezialnahmaschinenwerk Limbac Multi-needle embroidery machine
GB1100203A (en) * 1965-01-27 1968-01-24 Gegauf Fritz Ag A method of producing seams, and a sewing machine for carrying out the method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US386837A (en) * 1888-07-31 litchfield
US593733A (en) * 1897-11-16 Machine
US1474269A (en) * 1919-07-26 1923-11-13 William F Lautenschlager Sewing machine
US2018456A (en) * 1931-06-20 1935-10-22 Jonas Hans Embroidering or like machine
US2889792A (en) * 1954-06-08 1959-06-09 Spezialnahmaschinenwerk Limbac Multi-needle embroidery machine
GB1100203A (en) * 1965-01-27 1968-01-24 Gegauf Fritz Ag A method of producing seams, and a sewing machine for carrying out the method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241677A (en) * 1976-12-07 1980-12-30 Velva Ag Two needle sewing machine
US4195583A (en) * 1978-04-24 1980-04-01 The Singer Company Releasing mechanism for cam followers in a zigzag sewing machine
US4608937A (en) * 1982-02-04 1986-09-02 Janome Sewing Machine Co., Ltd. Device for stabilizing stitches in a sewing machine
US4473018A (en) * 1982-09-16 1984-09-25 Aisin Seiki Kabushiki Kaisha Needle bar selection device for a multiple needle sewing machine
US5664511A (en) * 1995-03-14 1997-09-09 Tokai Industrial Sewing Machine Co., Ltd. Thread cutter and drive unit for a chain stitch sewing machine
CN1049940C (zh) * 1995-03-14 2000-03-01 东海工业缝纫机株式会社 链式线迹缝纫机的纱线切断装置

Also Published As

Publication number Publication date
DE1685138B2 (fr) 1975-04-03
DE1685138C3 (fr) 1975-11-13
DE1685138A1 (de) 1971-07-29
FR1570385A (fr) 1969-06-06

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