US3066624A - Lock sittch machine with bobbin thread guide - Google Patents

Lock sittch machine with bobbin thread guide Download PDF

Info

Publication number
US3066624A
US3066624A US35019A US3501960A US3066624A US 3066624 A US3066624 A US 3066624A US 35019 A US35019 A US 35019A US 3501960 A US3501960 A US 3501960A US 3066624 A US3066624 A US 3066624A
Authority
US
United States
Prior art keywords
hook
thread
housing
bobbin
guiding
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
US35019A
Other languages
English (en)
Inventor
Sr Otto Jeppener
Jr Otto Jeppener
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3066624A publication Critical patent/US3066624A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • D05B57/22—Loop takers, e.g. loopers for lock-stitch sewing machines with spool-size bobbin for lower thread

Definitions

  • the invention relates to a method for producing a lock stitch seam by means of a rotating hook which is provided with a bottom thread bobbin rotating with the hook and the axis of which is disposed Vertically to the axis of bobbin rotation.
  • the problem is solved in that for maintaining the twisted condition of the bottom thread the withdrawing of the bottom thread from the bobbin is effected alternately, first on one side and then on the other side of the plane defined by the rotating axis of the bobbin or the plane in which the axis of the bobbin rotates.
  • apertures for the exit of the bottom thread are provided at the intersections of the outer wall of the bobbin housing with the axis of rotation of the hook across the base of the hook point by a slot in the bobbin housing for guiding the bottom thread.
  • the center portion of the guiding slot is provided with a thread sliding plane for the upper thread.
  • FIG. 1 is a side View, partly in section, of a sewing machine having a hook arrangement which is suitable for carrying out the new method
  • FIG. 2 shows the hook and its driving means
  • FiGS. 3 to 5 illustrate different forms of hook construction
  • FIGS. 6 to 8 illustrate the guiding of the thread guiding member by the abutment rotating with the hook in in three positions of operation with the position of the stitch hole indicated in dotted lines;
  • FIGS. 9 to 12 show the shifting of the bottom thread from one side of the bobbin housing to the other by means of the thread guiding member.
  • the hook drive shaft it (FIG. 2) arranged below the base plate or work plate of the sewing machine is provided with two driving arms 2 and 3 having pawls 4 and 5 which are adapted to engage corresponding recesses t3 and 7 of a hook 3a and which are displaced at an angle of relative to one another.
  • the hook 8a (FIG. 1) is journalled with its bearing ribs 9 and iii in a guiding groove 11 of a hook race ring 12 secured below the work plate of the machine,
  • the center part of the hook 8a is formed as a bobbin housing 13a consisting of a bottom cap 8 and a removable top cap 13 securely connected with the hook 3a and which receives a bottom thread bobbin 14.
  • a tension spring 15 secured to the inner wall surface of the top cap 13 (FIG. 5) is provided with a slot to into which the bottom thread is inserted and is passed through under the wall of the bobbin housing 13a to emerge through a slot 17 provided in the bobbin housing 13a.
  • the bottom thread bobbin 14- (FIG. 1) is provided with studs 18 which engage recesses 26 in the bottom cap 8.
  • the hook 8a is provided with a point 2?; which is joined to the bottom cap 8 at its base 22a.
  • the slot 17 connects two apertures 17a and 17b arranged at the iniiBl'SBCtlOHS of the outer wall of the bobbin housing 13a with the axis of rotation of the hook for the exit of the bottom thread by way of the base 22a of the hook point 22.
  • the center portion thereof is covered by a sliding surface 23 for the upper thread arranged at the base 22a of the hook point 22.
  • a double lever 27 having two cutout portions 25 and 26 which are connected with one another is arranged below the stitch hole 2 (FIGS. 68), which lever is pivotally secured to the hook race ring 12 by means of a screw 27a (see FIG. 1).
  • a wall portion 27! which limits the two cutouts 25 and 26 is formed in a manner that it defines a thread guiding member 27c having guiding edges 27d and 27e for the control of the bottom thread.
  • a wedge shaped abutment 28 which is pivotally connected to the bearing rib it ⁇ of the hook do by means of a screw 28a projects into the path of a stud 2% on the dou- 'ble lever 27 opposite the cutouts 255 and 26 and through a transverse slot 3b of the hook race ring 12 (see also FIG. 2).
  • the drive arms 2 and 3 which rotate with the hook drive shaft ll are connected by way of bearing balls 31 and 32 with guiding grooves 34 and 35 which are provided in a bearing 33 which is securely mounted on the machine.
  • the bearing balls 3-1 and 32 are retained in the guiding grooves 34 and 35 by springs (not shown) which engage the arms 2 and 3.
  • Shields 36, 37 (FIG. 4), one each provided on the sides of the bobbin housing 13a, cover the abutment 28 to guard against contact with the upper or bottom thread.
  • the invention operates as follows:
  • the book 8a which is journalled in the guiding groove 11 (FIGS. 1 and 2) of the hook race ring 12, is driven by the hook shaft it by way of the two drive arms 2 and 3.
  • the guiding grooves 34- and 35 rock pawls 4- and 5 of the two drive arms 2 and 3 in a known manner alternately into the recesses 6 and 7 of the hook 8a, so that the upper thread loop which is conducted around the bobbin housing 13a is not impeded.
  • the abutment 28 which rotates with the hook 3 places itself against the stud 29 of the double lever 27 which is journaled on the hook race ring 12 and thus controls the movement of the thread guiding member 27c.
  • FIG. 9 indicates the position of the thread guiding member 270 in the end position to the right.
  • the hook point 2 has seized the upper thread loop, which for clarity is not illustrated, and guides it around the bobbin housing 13a while the guiding plane 23 prevents entrance of the thread loop into the slot 17.
  • the bottom thread moves out of the right aperture 17a of the bobbin housing 13a and extends in a straight line to the stitch hole 24.
  • the upper thread loop slides over the bottom housing 13a and is pulled up by the thread lever after dropping from the hook in a known manner.
  • FIGS. 6 and 10 indicate the position where the shifting of the double lever 27 begins.
  • the thread guiding member 270 of the double lever 27 is shifted to the left.
  • the guiding edge 2% now carries along the bottom thread (FIG. 11).
  • the wall of the slot 3 9 limits the rocking range of the double lever 27 in a manner that the point of the wedge shaped abutment 2? ⁇ is shifted to the right during the further rotation of the bobbin housing 13:; by the stud 2b, which is now standing still, as indicated in FIGS. 7 and 8.
  • the bottom thread is pulled by the lateral pull vhich the thread guiding edge 27d eifects on it from the right aperture 17:: across the center of the slot 1'7, and is then guided as a result of the increasing distance of the center of the slot from the stitch hole to the left aperture 17b.
  • the bottom thread slides from the guiding edge 27d of the thread guiding member 27, since it is positioned obliquely as a result of the rotation of slot 17 and thus extends in a direct line from the left aperture 17b of the bobbin housing 13a to the stitch hole 24.
  • a lock stitch sewing machine having a work plate and a stitch hole defined in the working areaof said plate, a stationary support member having a guiding groove and secured proximate the stitch hole below the work plate of the machine, a rotatable housing havmg bearing ribs in engagement with said guiding groove 21 hook defined on said housing and rotatable therewith, a bottom thread bobbin disposed in said housing and rotatable therewith, said bobbin having its axis disposed transversely of the axis of rotation of said hook, and means comprising a hook shaft drivingly linked to said housing, means operative to maintain the normal twisted condition of the bottom thread comprising a stationary pivot on said support member, a thread guiding member having one end presenting a guiding aperture proximate said stitch hole and an end defining a guided member extending radially of the path of rotation of said hook and pivotally supported intermediate said ends on said stationary pivot, a pivot member on said housing, an abutment member supported on said pivot member circum
  • a lock stitch sewing machine having a Work plate and a stitch hole defined in the working area of said plate, stationary support member having a guiding groove and secured proximate the sti ch hole below the Work plate of the machine, a rotatable housing having bearing ribs in engagement with said guiding groove, a hook defined on said housing and rotatable therewith, a bottom thread bobbin disposed in said housing and rotatable therewith, said bobbin having its axis disposed transversely of the axis of rotation of said hook, and means comprising a hook shaft drivingly linked to said housing, means operative to maintain the normal twisted condition of the bottom thread comprising a stationary pivot on said support member, a thread guiding member having one end presenting a guiding aperture proximate said stitch hole and an end definin.
  • a guided member extending radially of the path of rotation of said hook and pivotally supported intermediate said ends on said stationary pivot, a pivot member on said housing, an abutment member supported on said pivot member circumferentially of said housing and having edges adapted during rotation of said housing to alternately engage and move said guided member and thereby said guiding memcr in opposite directions and means limiting the movement of said guided member comprising an abutment means provided on said stationary member, said housing having pp uter walls provided with apertures for the exit of the thread therethrough and a slot defined by spaced wall portions of said housing and extending transversely of said housing between said apertures and across the base of said hook.
  • a rotatable housing having bearing ribs in engagement with said guiding groove, a hook defined on said housing and rotatable therewith, a bottom thread bobbin disposed in said housing and rotatable therewith, said bobbin having its axis disposed transversely of the axis of rotation of said hook, and means comprising a hook shaft drivingly linked to said housing, means operative to maintain the normal twisted condition of the bottom thread comprising a stationary pivot on said support member, a thread guiding member having one end presenting a guiding aperture proximate said stitch hole and an end defining a guided member extending radially of the path of rotation of said hook and pivotally supported intermediate said ends on said stationary pivot, a pivot member on said housing, an abutment member supported on said pivot member circumferentially of said housing and having edges adapted during rotation of said housing

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US35019A 1959-06-09 1960-06-09 Lock sittch machine with bobbin thread guide Expired - Lifetime US3066624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ0016510 1959-06-09

Publications (1)

Publication Number Publication Date
US3066624A true US3066624A (en) 1962-12-04

Family

ID=7199502

Family Applications (1)

Application Number Title Priority Date Filing Date
US35019A Expired - Lifetime US3066624A (en) 1959-06-09 1960-06-09 Lock sittch machine with bobbin thread guide

Country Status (4)

Country Link
US (1) US3066624A (en))
CH (1) CH386217A (en))
GB (1) GB893468A (en))
NL (1) NL252406A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470360A (en) * 1982-12-06 1984-09-11 Leif Gerlach Sewing machine
US6347597B1 (en) * 2000-12-27 2002-02-19 Jung Kuang Chen Flat sewing device without thread bobbins

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1399546A (en) * 1919-12-13 1921-12-06 Theodore F Ellis Silo
US2327817A (en) * 1942-09-03 1943-08-24 Singer Mfg Co Stitch-forming mechanism for sewing machines
US2873706A (en) * 1956-01-23 1959-02-17 Nippon Mishin Seizo Kabushiki Sewing mechanism of sewing machine
US2884882A (en) * 1955-11-01 1959-05-05 Cluett Peabody & Co Inc Sewing machine with finger to control bobbin thread
US2892428A (en) * 1955-02-25 1959-06-30 Singer Mfg Co Loop-takers for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1399546A (en) * 1919-12-13 1921-12-06 Theodore F Ellis Silo
US2327817A (en) * 1942-09-03 1943-08-24 Singer Mfg Co Stitch-forming mechanism for sewing machines
US2892428A (en) * 1955-02-25 1959-06-30 Singer Mfg Co Loop-takers for sewing machines
US2884882A (en) * 1955-11-01 1959-05-05 Cluett Peabody & Co Inc Sewing machine with finger to control bobbin thread
US2873706A (en) * 1956-01-23 1959-02-17 Nippon Mishin Seizo Kabushiki Sewing mechanism of sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470360A (en) * 1982-12-06 1984-09-11 Leif Gerlach Sewing machine
US6347597B1 (en) * 2000-12-27 2002-02-19 Jung Kuang Chen Flat sewing device without thread bobbins

Also Published As

Publication number Publication date
NL252406A (en))
GB893468A (en) 1962-04-11
CH386217A (de) 1964-12-31

Similar Documents

Publication Publication Date Title
US3012530A (en) Lock stitch sewing machines
US2866425A (en) Lockstitch sewing machines
US3066624A (en) Lock sittch machine with bobbin thread guide
JPH0237196B2 (en))
US3693565A (en) Lockstitch loop takers for sewing machines
US2851977A (en) Loop takers for lock stitch sewing machines
US4572091A (en) Freely revolving looper for double lockstitch sewing machines
US2694373A (en) Rotary hook assembly
US3407760A (en) Bobbin thread replenishing mechanism for sewing machines
US3379150A (en) Loop takers for sewing machines
US4200050A (en) Thread cutting device for lockstitch sewing machines
US3125049A (en) Sewing machine
US5660127A (en) Thread end cutting and holding in a sewing machine
US2385960A (en) Rotary take-up mechanism for sewing machines
US3805719A (en) Lock stitch loop-taker attachment for sewing machines
US3428008A (en) Lock-stitch sewing machine convertible to a chain stitch sewing machine
US4374503A (en) Chain stitch device for lock stitch sewing machines
US2895441A (en) Sewing machine
US1062696A (en) Sewing-machine.
US4006699A (en) Thread guide means for sewing machine
US2817307A (en) Thread-cases for lock-stitch sewing machines
US2088560A (en) Sewing machine
KR870001030B1 (ko) 천의 가장자리를 감치는 재봉기의 부속장치(over casting attachment)
US2419698A (en) Thread case and carrier therefor for lock-stitch sewing machines
ES226907A1 (es) UN DISPOSITIVO TOMADOR DE BUCLES PARA UNA MáQUINA DE COSER EN ZIG-ZAG