US3357385A - Shuttle driver - Google Patents

Shuttle driver Download PDF

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Publication number
US3357385A
US3357385A US462012A US46201265A US3357385A US 3357385 A US3357385 A US 3357385A US 462012 A US462012 A US 462012A US 46201265 A US46201265 A US 46201265A US 3357385 A US3357385 A US 3357385A
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US
United States
Prior art keywords
shuttle
driver
core
shuttle driver
oscillatory
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
US462012A
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English (en)
Inventor
Gustin Giuliano
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.)
Fratelli Borletti SpA
Borletti SpA
Original Assignee
Borletti SpA
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 Borletti SpA filed Critical Borletti SpA
Application granted granted Critical
Publication of US3357385A publication Critical patent/US3357385A/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
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks

Definitions

  • the present invention relates to a device which may be termed a shuttle driver, for sewing machines of the type having an angularly oscillatory shuttle.
  • shuttle driver is generally constituted by an arcuate metal member which is fixed by means of an extension thereon at its center on a shaft that executes an angular oscillatory movement about its axis.
  • the shuttle driver is not in the form of a single arc concentric with the axis of the shaft, but is of a known mixtilinear shape, that is, of a shape having portions of different curvature and different degrees of straightness along its length, matching the shuttle and the travel of the upper sewing thread. This increases the difficulty of making it by known technological working and finishing operations.
  • the device according to the present invention avoids in a complete and ingenious manner the above-mentioned disadvantages of noise and high cost of production. It comprises a metallic core capable of being fixed to the oscillatory control shaft, and is provided, at least at one of the two ends adapted to come into contact with the shuttle, with a covering of plastic material, alone or reinforced, obtained by direct moulding onto the core. In this manner the impact is no longer impact between metallic parts, but between the metal of the shuttle and the softer plastic material, at at least one end of the shuttle driver.
  • the end of the shuttle driver that strikes the back of the shuttle-the end of the shuttle remote from its 3,357,385 Patented Dec. 12, 1967 point- is desirably provided, by molding or by working, with a transverse cut-out or recess, or at least one hole, which renders the said end more resilient.
  • the metallic core is constituted by sheared and bent metal plate and the covering extends over the whole surface thereof.
  • This latter arrangement is pro.- vided by molding or injection molding without undercuts, from plastic material, alone or reinforced with glass fibers, the material being one of high mechanical resistance such for example as Delrin, nylon, Nylafil or Makrolon, vulcanized rubber or the like.
  • the metallic core made without any separate finishing operation is particularly well adapted to permit the shuttle driver to be fixed on the oscillatory control shaft, and to maintain its shape.
  • FIG. 1 shows in front view, for the purpose of illus: trating the prior art, a shuttle and a shuttle driver of kn y e;
  • FIG. 2 is a view similar to FIG. 1 of a shuttle driver according to the present invention.
  • FIGS. 3a, 3b and 3c illustrate in detail the chamfering of the zone of contact between the needle and the shuttle driver
  • FIGS. 4, 5 and 6 illustrated three different forms of the shuttle driver showing its end formed with recesses adapted to render it more resilient.
  • the metallic core 1 that constitutes the armature of the shuttle driver according to the present invention comprises an arcuate member 2 and a radial extension 3 by means of which it is fixed to the control shaft 4 that executes an angular oscillatory motion.
  • the core 1 is mounted in such manner that the center of curvature of the member 2 coincides with the axis of the shaft 4.
  • the core 1 is preferably formed from sheet metal by shearing and bending, without any other operation. It may however be made in other economical ways, for example by injection molding from zama, silumin or other suitable metallic material.
  • the core 1 is then covered, by molding or injection molding, with plastic material 1, for example Delrin, nylon, Nylafil or Makrolon, or vulcanized rubber or the like. This operation is effected in such manner that the shuttle driver assumes the required shape without the necessity for further working.
  • plastic material for example Delrin, nylon, Nylafil or Makrolon, or vulcanized rubber or the like.
  • FIG. 4 In order further to reduce noise the plastic end Sthat strikes the back of the shuttle is provided with at least one transverse recess that renders the end 5 resilient.
  • FIG. 4 In FIG. 4 are illustrated two cutouts 6, while in FIG. 5 there is provided, for the same purpose, a recess 7, and in FIG. 6 there are provided holes 8.
  • the chamfer 9 (FIGS. 3a and 3b) thus made, exposes 3 the metallic surface 2' that otters to the needle the same resistance" as normal metallic shuttle drivers.
  • the shuttle is guided in known manner on the runway 10 by a support 11 concentric with the oscillatory shaft 4.
  • a shuttle driver of the type having two ends adapted to come alternately into contact with the shuttle to impart oscillations to it, said shuttle driver comprising a metallic core and a generally radial extension by which the driver may be fixed on an oscillatory control shaft, said metallic core having arms that extend in opposite directions from said radial extension, each said arm ter-' minating in one of said ends, and on at least one of said ends a covering of plastic material molded directly onto the core.
  • a shuttle driver of the type having two ends adapted to come alternately into contact with the shuttle to impartoscillations to it, said shuttle driver comprising a metallic core capable of being fixed on an oscillatory con- 4 trol shaft, and on at least one of the said two ends, a covering of plastic material molded directly onto the core, said at least one end having recesses therein adapted to increase its flexibility.
  • a shuttle driver of the type having two ends adapted to come alternately into contact with the shuttle to impart oscillations to. it, said shuttle driver comprising a metallic core capable of being fixed on an oscillatory control shaft, and on at least one of the said two ends, a covering of plastic material molded directly onto the core, a chamfer being provided at the zone which makes contact with the shuttle, so as to remove the plastic material from this zone and to expose a part of the surface of the metallic core.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US462012A 1964-06-10 1965-06-07 Shuttle driver Expired - Lifetime US3357385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT4813164 1964-06-10

Publications (1)

Publication Number Publication Date
US3357385A true US3357385A (en) 1967-12-12

Family

ID=11264722

Family Applications (1)

Application Number Title Priority Date Filing Date
US462012A Expired - Lifetime US3357385A (en) 1964-06-10 1965-06-07 Shuttle driver

Country Status (5)

Country Link
US (1) US3357385A (it)
CH (1) CH406807A (it)
DE (1) DE1485149A1 (it)
FR (1) FR1440270A (it)
GB (1) GB1078502A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769855A (en) * 1987-01-23 1988-09-13 Elephant Garment Co., Ltd. Baby's night gown

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822773A (en) * 1954-10-22 1958-02-11 Singer Mfg Co Shuttle mechanisms for sewing machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822773A (en) * 1954-10-22 1958-02-11 Singer Mfg Co Shuttle mechanisms for sewing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769855A (en) * 1987-01-23 1988-09-13 Elephant Garment Co., Ltd. Baby's night gown

Also Published As

Publication number Publication date
FR1440270A (fr) 1966-05-27
GB1078502A (en) 1967-08-09
CH406807A (it) 1966-01-31
DE1485149A1 (de) 1970-09-17

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