US3698333A - Rotating shuttle drive mechanisms - Google Patents

Rotating shuttle drive mechanisms Download PDF

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Publication number
US3698333A
US3698333A US150608A US3698333DA US3698333A US 3698333 A US3698333 A US 3698333A US 150608 A US150608 A US 150608A US 3698333D A US3698333D A US 3698333DA US 3698333 A US3698333 A US 3698333A
Authority
US
United States
Prior art keywords
shuttle
disc
pinion
thread
needle
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
US150608A
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English (en)
Inventor
Stanley J Ketterer
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.)
SSMC Inc
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of US3698333A publication Critical patent/US3698333A/en
Assigned to SSMC INC., A CORP. OF DE reassignment SSMC INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
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

  • a shuttleas is well known in the sewing machine art, is a lockstitch forming loop taker which accommodates a supply of locking thread, usually on a bobbin stored in the shuttle and forms lockstitches by passing bodily through each successive needle thread loop, thereby concatenating the needle and locking thread into lockstitches.
  • each loop of needle thread must pass between the shuttle and the mechanism of the machine for imparting movement to the shuttle.
  • the shuttle is oscillated back and forth during each stitch forming cycle, the reversal of direction of the shuttle drive elements naturally provides clearance for the needle thread loops to pass therebetween.
  • Prior known rotary shuttle drive mechanisms in which provision has been made to provide an opening through which needle thread loops might be passed between the shuttle and the shuttle driver have involved elements required to be imparted harsh motions or to be driven at highspeeds equal to or many times greater than the speed of operation of the shuttle.
  • Such prior rotary shuttle drive mechanisms have tended to be noisy and have tended to wear abnormally high rates.
  • a keying element between the shuttle driver and the shuttle which takes the form of a pinion of which the teeth mesh with a stationary screw formed in the shuttle housing of the sewing machine.
  • the pitch of the pinion teeth and of the stationary screw with which they mesh is chosen to provide for rotation of the pinion about its own axis at a fraction of the speed of rotation of the shuttle so that a radial indentation in the pinion between the teeth thereof may accommodate and shift each needle thread loop which is seized by the shuttle through the shuttle driving connections.
  • FIG. 1 represents an end elevational view of a sewing machine having a shuttle driving mechanism of my invention applied thereto
  • FIG. 2 is an enlarged vertical cross-sectional view taken substantially along line 2-2 of FIG. 1 through the longitudinal axis of shuttle rotation,
  • FIG. 3 is an exploded perspective view of the shuttle housing, the shuttle and the shuttle driving mechanism of this invention
  • FIGS. 4,5, 6 and-7 represent elevational views of the face of the shuttle each taken at a different position of rotation of the shuttle during a typical stitch forming cycle and including a representation of the needle thread loop being manipulated by the shuttle, and
  • FIG. 8 is a cross-sectional view taken substantially along line 8-8 of FIG. 6 illustrating the needle thread loop as it is passing between the shuttle. and the shuttle driving mechanism.
  • this invention is illustrated as embodied in a conventionally organized sewing machine including a frame having a work supporting bed 11 from which rises a standard 12 carrying a bracketarm 13 overhanging the bed.
  • a thread carrying needle 14 is secured to a needle bar 15 supported in the bracket arm and driven by a mechanism (not shown) in timed relation with a rotary bed shaft 16 illustrated in FIGS. 2 and 3.
  • the bed shaft is preferably imparted one revolution for each cycle of reciprocation of the needle.
  • a needle thread take-up member 17 and a needle thread tension device 18 are carried by the bracket arm and serve in a conventional manner to influence the needle thread which extends to the thread carrying needle 14.
  • the needle 14 reciprocates endwise through aneedle aperture 20 in a throat plate 21 on the work supporting bed 11 of the sewing machine and cooperates beneath the throat plate with a shuttle indicated generally at 22.
  • a work feed'dog 23 which may be carried by a feed bar 24 which is imparted rising and falling movements by a feed lift rock shaft 25 by way of a rock arm 26 and a link 27, and to which feed advance and return movements are imparted by a rock frame 28 fast on a feed rock advance.
  • the feed dog 23 works through slots 30 in the throat plate in opposition to a presser device 31 supported on a presser bar 32 carried in the bracket arm 13.
  • the shuttle 22 is preferably fonned with a circular bearing rib 40 which extends from a flat rear face 41.
  • the shuttle is formed with a body portion 42 provided in the front face with a bobbin accommodating cavity 43.
  • a central stud 44 may be formed from the flat rear face 41 into the bobbin accommodating cavity 43.
  • a flanged bobbin seat 45 is retained on the stud 44 by a screw 46 which can adjust the pressure between the flanged bobbin seat and a friction washer 47 which is arranged against the flat rear face 41 of the bobbin.
  • the flanged bobbin seat is thus rotatable on the seat 44, subject to frictional resistance to turning which may be regulated by the screw 46.
  • the bearing rib 40 of the thread is formed with a gap 59 defining at one side a needle loop seizing beak 60 adapted as shown in FIG. 4 to seize and to distend loops of needle thread N during operation of the sewing machine.
  • the shuttle bearing rib is formed with a needle thread loop detaining finger 61 which serves as shown in FIG. 7 to engage each needle thread loop N after it has been passed completely about the shuttle to prevent the loop of thread from flying out of control as it is drawn into the work being stitched.
  • a shuttle housing block 70 is fixed in the sewing machine bed and formed with a bearing surface 71 for the bed shaft 16.
  • the bearing surface 71 opens upon a cavity 72 which is provided at the mouth thereof with a raceway 73 in which the shuttle bearing rib 40 is journaled for rotation.
  • a semi-circular shuttle retainer 74 and a resilient fastening clip 75 are secured by a fastening screw 76 on the exposed face 77 of the shuttle housing block 70 to constrain the shuttle 22 in the raceway 73.
  • the bed shaft 16 protrudes into the cavity 72 in the shuttle housing block and in the cavity 72 a shuttle driving block 78 is secured to the bed shaft 16 by a set screw 79 and by a drift pin 79'.
  • the shuttle driving block is formed with a radial slot 80 in which a pinion 81 is constrained.
  • the pinion is journaled in the shuttle driving block on an axle pin 82 secured therein, so that while it may turn on its own axis in the shuttle driving block, the pinion will be snugly supported against tilting by the closely fitting radial slot 80.
  • the pinion is carried in the shuttle driving block with the pinion teeth 83 protruding both radially and axially from the shuttle driving block 78.
  • the pinion teeth 83 mesh with a stationary screw 84, formed internally of the cavity 72 in the shuttle housing block.
  • the teeth 83 of the pinion extend into a radial slot 85 formed in the flat rear face 41 of the shuttle.
  • the pinion teeth 83 extend radially only partially into the radial slot 85 and the rear face of the shuttle so that a space is provided in the radial indentations 86 between the pinion teeth 83 for accommodation of needle thread loops as the needle thread loops pass between the shuttle and the pinion during each stitch forming operation.
  • a drive mechanism for imparting circular movement to said shuttle comprising, stationary support means on said sewing machine formed with a raceway constraining said shuttle for movement in a circular path, a shuttle driving member supported for circular movement in spaced relation to said stationary support means, a disc rotatably supported on said shuttle driving member on an axis perpendicular to the axis of circular movement of said shuttle member, said shuttle being formed with a radial slot embracing the periphery of said disc, said disc periphery being formed with a radial thread accommodating indentation, and means operatively connected to said disc and effective to impart turning movement to said disc about said disc axis at a rate not greater than one revolution of said disc during each revolution of said shuttle driving member.
  • a shuttle drive mechanism as set forth in claim 2 in which said means effective to impart turning movement to said disc comprises a screw carried by said stationary support means and arranged in mesh with said pinion teeth.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US150608A 1971-06-07 1971-06-07 Rotating shuttle drive mechanisms Expired - Lifetime US3698333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15060871A 1971-06-07 1971-06-07

Publications (1)

Publication Number Publication Date
US3698333A true US3698333A (en) 1972-10-17

Family

ID=22535280

Family Applications (1)

Application Number Title Priority Date Filing Date
US150608A Expired - Lifetime US3698333A (en) 1971-06-07 1971-06-07 Rotating shuttle drive mechanisms

Country Status (7)

Country Link
US (1) US3698333A (it)
JP (1) JPS558195B1 (it)
BR (1) BR7203514D0 (it)
DE (1) DE2226483C2 (it)
FR (1) FR2141176A5 (it)
GB (1) GB1385067A (it)
IT (1) IT955464B (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074643A (en) * 1976-06-21 1978-02-21 The Singer Company Rail-bearing for rotary shuttles
WO1993020273A1 (en) * 1992-03-31 1993-10-14 Bakron Corporation Undercut and strengthened posts for polymeric bobbin baskets
USD804627S1 (en) 2015-05-19 2017-12-05 Broan-Nutone Llc Vent hood
USD814009S1 (en) 2015-05-19 2018-03-27 Broan-Nutone, Llc Vent hood
USD815724S1 (en) 2015-09-14 2018-04-17 Broan-Nutone Llc Ventilation grill
USD822821S1 (en) 2015-09-14 2018-07-10 Broan-Nutone, Llc Ventilation grill
CN109234924A (zh) * 2018-12-04 2019-01-18 辛智文 缝纫机的底线供线机构、缝纫机及缝纫方法
USD897521S1 (en) 2016-10-14 2020-09-29 Broan-Nutone Llc Vent hood
US10808346B1 (en) * 2017-04-10 2020-10-20 James Buck Rotary hook sleeve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447499A (en) * 1966-03-22 1969-06-03 Janome Sewing Machine Co Ltd Rotary loop forming device for sewing machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074643A (en) * 1976-06-21 1978-02-21 The Singer Company Rail-bearing for rotary shuttles
WO1993020273A1 (en) * 1992-03-31 1993-10-14 Bakron Corporation Undercut and strengthened posts for polymeric bobbin baskets
US5375544A (en) * 1992-03-31 1994-12-27 Bakron Corporation Undercut and strengthened posts for polymeric bobbin basket
USD804627S1 (en) 2015-05-19 2017-12-05 Broan-Nutone Llc Vent hood
USD814009S1 (en) 2015-05-19 2018-03-27 Broan-Nutone, Llc Vent hood
USD815724S1 (en) 2015-09-14 2018-04-17 Broan-Nutone Llc Ventilation grill
USD822821S1 (en) 2015-09-14 2018-07-10 Broan-Nutone, Llc Ventilation grill
USD897521S1 (en) 2016-10-14 2020-09-29 Broan-Nutone Llc Vent hood
US10808346B1 (en) * 2017-04-10 2020-10-20 James Buck Rotary hook sleeve
CN109234924A (zh) * 2018-12-04 2019-01-18 辛智文 缝纫机的底线供线机构、缝纫机及缝纫方法

Also Published As

Publication number Publication date
IT955464B (it) 1973-09-29
FR2141176A5 (it) 1973-01-19
DE2226483A1 (de) 1972-12-28
GB1385067A (en) 1975-02-26
JPS558195B1 (it) 1980-03-03
BR7203514D0 (pt) 1973-07-10
DE2226483C2 (de) 1982-11-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SSMC INC., A CORP. OF DE, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:005041/0077

Effective date: 19881202