[go: up one dir, main page]

US1646946A - Cord-handling mechanism for buttonhole-sewing machines - Google Patents

Cord-handling mechanism for buttonhole-sewing machines Download PDF

Info

Publication number
US1646946A
US1646946A US83210A US8321026A US1646946A US 1646946 A US1646946 A US 1646946A US 83210 A US83210 A US 83210A US 8321026 A US8321026 A US 8321026A US 1646946 A US1646946 A US 1646946A
Authority
US
United States
Prior art keywords
cord
sewing
buttonhole
stitch
shaft
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
US83210A
Other languages
English (en)
Inventor
Edward B Allen
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.)
Singer Co
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
Priority to US83210A priority Critical patent/US1646946A/en
Priority to GB16423/26A priority patent/GB261648A/en
Priority to FR618745D priority patent/FR618745A/fr
Priority to DES75365D priority patent/DE461791C/de
Application granted granted Critical
Publication of US1646946A publication Critical patent/US1646946A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D05B3/06—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 for sewing buttonholes
    • D05B3/08—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 for sewing buttonholes for buttonholes with eyelet ends
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2303/00—Applied objects or articles
    • D05D2303/08—Cordage

Definitions

  • This invention relates to sewing machines of the buttonhole type adapted to sew a group of stitches and then come to rest.
  • Machines of this type commonly embody ovcrseaming stitch-forming mechanism and :1V work-holder with means for relatively moving them to sew about a buttonhole.
  • a cord-guide is customarily provided adjacent the sewing point to deliver a stay-cord or gimp thread within the range of action of the stitch-forming mechanism so that such cord will be embraced within the over-seam; the cord-guide being commonly formed as a small hole in the usual needlc-throat member.
  • Means are also commonly provided for cutting the cord, as well as the sewing threads, after the sewing operation has been completed.
  • the present invention has for an object to avoid cord wastage and the diliicult-ics incident to retrimming the cord.
  • To this end means are provided for pulling the cord back through the cord-guide so that the protruding end of the cord will be no longer than required to be safely bound by the initial stitches.
  • the cord pull-back mechanism may comprise a cord-engaging implement with means for giving it a single to-and-fro movement at the proper time across the lead of the cord between the cord-guide and a suitable cord nipper; the latter device being actuated to arrest the feed of the cord while the cord is engaged by the pull-back implement.
  • the cord is left in a slack condition so that it will run free of tension until the cord end is safely bound by the initial stitches.
  • Fig. 1 is a side elevation of a buttonhole sewing machine embodying the invention.
  • Fig. 9. is a horizontal section through the bracliet-arm standard SllOWlIlg the machine bed in plan.
  • Fig. 3 is a partial front end elevation of the machine.
  • Figs. 4 and 5 are, respectively, plan and elevation views of the parts adjacent the sewing point at the end of the sewing period after the work has been shifted to buttonhole cutting position.
  • Figs. 6 and 7 are respectively plan and elevation views of the same parts at a slightly later stage when the turret carrying the lower stitch-forming instrumentalities and cordguiding means has been reversely rotated 180 to restore itto initial position; the cord-cutter being active at the close of this reverse rotation.
  • Figs. 1 is a side elevation of a buttonhole sewing machine embodying the invention.
  • Fig. 9. is a horizontal section through the bracliet-arm standard SllOWlIlg the machine bed in plan.
  • Fig. 3 is a partial
  • FIGs. 8 and 9 are respectively plan and elevation views of the same parts at a still later stage when the stitched buttonhole is being actedupon by the buttonhole cutting mechanism.
  • the cord pull-back and nipping elements are shown in operative engagement with the cord.
  • the invention is described as embodied in an automatic eyelet-end buttonhole sewing machine, the frame of which comprises the hollow rectangular bed 1 from one end of which rises the standard 2 of the overhanging braclzct-arm 3 terminating in the head 4.
  • the stitclrforming' mechanism is constructed substantially in accordance with the disclosure of the Allen et al. Patent No. 1,372,473, of Mar-ch22, 1921, and comprises the usual upper and under thread. mechanisms.
  • the upper thread mechanism comprises the reciprocating and laterally jogging needle 5 carried by the needle-bar 6 which is reciprocated by means of the link connection 7 with the crank 8 on the upper shaft 9.
  • the shaft 9 is geared to the vertical shaft 10 which is driven by the lower main sewing shaft 11.
  • the under thread mechanism comprises the usual loop-taking devices 12 which, together with the usual needlethroat member 12 are carried by the rotary turret 1 3.
  • the loop-taking devices are actuated through,
  • turret 13' and needle-bar 6 are at times rotated in unison, as in sewing around the eyelet-end of a buttonhole, by means of the respective sector gears 14, 15, connected by links 16, 17, to cranks 18, 19, on the vertical shaft 20.
  • the crank 18"Fig. 2 has a follower 21 entering the stitch-forming mechanism rotating groove 22 in the feed-wheel 28.
  • the feed-wheel 23 driven at a relatively slow speed, through suitable gear connections, not shown, by the sewing shaft 11.
  • the feed-wheel is driven at a higher speed by the rapid feedshaft 24 which carries a gear 25 meshing with gear teethaon the. feed-wheel and re ceivcs its motion through a clutch-connection, not shown, from the constantly rotating lower shaft 26.
  • the period of action of the sewing shaft 11 is controlled by the usual stop-motion device 27 through which such shaft isconnected to and disconnected from the constantly running belt-pulley 28.
  • the work-holder is constructed substantially in accordance with the disclosure of the Allen Patent No. 15,324, reissued April 4, 1922, and comprises the lower clampplates 29 and upper clamping feet 29 carried by the crossjslide-plate 30 mounted in turn on the longitudinal slide-frame 31 adapted to slide in suitable ways in the mas chine bed.
  • the cross'slideplate 30 and longitudinal slide-frame 31 are actuated by the usual connections with the feed-wheel as described in said reissued patent. hen the machine is started the work-clamp occupies a position removed from sewing position.
  • the buttonhole cutting mechanism is constructed substantiallyin accordance with the disclosure of said reissued patent and com prisesfthe upper and under cutter-levers 32, 33, fulcrumed at 34 on the fulcrum-block 35, Fig. 2, to which travelling movements longitudinally of the bed 1 are given by means of the link-connections 36' from the cutter-advancing and '-retracting cam .37 on the cutter-shaft 38. .
  • the cutter-levers are closed to cut the buttonhole by means of the cutter-closing cams-39, 10, on the cuttershaft 38 which is actuated from the constantly running pulley 38 through the usual automatic one-revolution clutch-device 38*.
  • the under threadand cord-cutter is constructed substantially in accordance with the" disclosure of my Patent No. 1,579,200, dated Aprg6, 1926. It comprises a scissors device including ablade .41 fixed to a carrier-lever 42fulc rumed at l3 on the machine frame. A second'blade 414 is'fulcrumed at 45 on the first mentioned blade 41' and has a tail-piece which carries a follower 46 entering a stationary cam-groove 17.
  • the actuating mechanism for the scissors carrying lever is constructed substantially in accordance with the disclosure of my copending application Serial No. 6 l:9,-i l0,-filed July 5, 1923, and comprises an actuating lever 18 fu'lcrumed at 49 on the frame-bracket 50 and connected at.
  • the lever 48 has a follower 52 en-- tering the cam-grooves 53 in the gear-member 25 on the rapidfeed shaft 24.
  • the camgroove 58 has an eccentric portion 53 which is tuned.
  • the cord 0 is led to the needle-throat member through a stationary cord-tube 5 1 me thence across the under flat nipping face 55 and up through a guiding aperture 56 in a cord-nipper jaw member 57 thence to and through the usual cord delivery aperture in the needle-throat member 12*.
  • a light tension'spring 58 on the upper face of the jaw member 57 puts a light drag on the cord 0.
  • the nipper-jaw member 57 is mounted on the rotary turret 13 and at times is coopei indellendsntly Of the turret.13;
  • the nipper-jaw member 59 is formed as a lever having a tail piece (31 which is acted upon by a roll (32carried by the cord pulls back bar 63 mounted on the travellin fulcrum block 35 which carries the butto inhole cutter-levers 32, 33.
  • Thetail-piece 61 of the cord-nipper lever 09 is formed with a camrise 64 which is engaged by the roll 62 during the advance of the cutter-levers preparatory to' the cutting of'thebuttonhole. Such engagement causes the flipper-jaw 59 to pinch the cord 0 against the under face of, the jaw .57 and thus to arrest the feed of the cord.
  • the cord pull-back 63 isformed at its forward end with a finger 65 and shoulder 66.
  • the 'iinger xi5 passes under the cord between the cord-guide 56 and the needle-throat member; the shoulder 6 engaging the cord and pulling a measured length of cord back through the core delivery aperture in the needle-throat member.
  • the cycle of operations is as follows: After the sewing operation has been completed and the action of the rapid feedshaft has carried the work from sewing to buttonhole cutting position, the parts are in the position shown in Fig. 4; the nipperjaw member 57 being spaced 180 from its companion jaw 59.
  • the turret 13 reaches .initial position, carrying the nipperjaw 57 directly over the aw 59, the 0 11111 portion 53 in the gear 25 effects the quiet ad ance and closure of the scissors 41, 44,-, l? 6, to cut the cord close to the end or the button-hole.
  • the buttonhole cutting mechanism is tripped into action and, during the advance o t the cutter fulcrum blocli 35, the aws 59, 54, are closed upon the cord and the shoulder 66 en gages the cord, Fi gs.
  • stitch-forming mechanism a. workliolder, means for relatively moving them during the sewing, a needle-throat member, a cord-guide for delivering a cord within the range of action of the stitcl1-forming mechanism, a cord-nipper open during the sewing, means for closing said nipper on the cord subsequent to sewing, and a cord pullback device out of strain-exerting engag ment with the cord during the sewing and acting on the cord between said nipper and said needle-throat member after the nipper has been closed.
  • a sewing machine of the buttonhole type stitch-forming mechanism, a work holder, a sewing shaft and connections for relatively moving the stitch-forming mechanism and worleholder during the sewing, a cord-guide for delivering a cord within the range of action of the stitch-forming mechanism, a. cord-cutter, a second shaft stationary during the sewing with means for driving it between sewing periods, and means mechanically connected to be driven by said second shaft for pulling back on the cord to shorten the severed cord end.
  • stitch-forming mechanism In a sewing machine of the buttonhole type, stitch-forming mechanism, a workholder, a sewing shaft and connections for relatively moving the stitch-forming mechanism and work-holder during the sewing, a cord-guide for delivering a cord within the range of action of the stitch-forming mechanism, a cord-nipper, a cord-cutter, a second shaft stationary during the sewing with means for driving itbetween sewing periods, and means mechanically connected to be driven by said second shaft for actuating said cord-nipper and for pulling back on the cord to shorten the severed cord end.
  • stitclrforming devices including upper thread mechanism, under thread mechanism, a rotary turret carrying the under thread mechanism, a cord guidecarried by said turret, a work-holder, means for relatively moving the stitch-forming mechanism and work-holder during the sewing, a cord-nipping device including coacting jaws one of which is carried by said turret and the other of which is mounted independently of said turret, said jaws being cooperatively related when the turret occupies a predetermined position, and a cord pull-back device adapted to act on the cord between said nipping from buttonhole cutting position, means for shifting the work-holder from sewing to buttonhole cutting position, a cord-cutter, and a cord pullback device connected to be operated by the travelling movement o'f said buttonhole cutter fulcrum block.
  • a cord-guide for delivering a cord entirely within the overseam produced by said stitchforming mechanism, a cord-cutter, and cordengaging means having cord pull-back and slack-giving motions between sewing periods for pulling a measured length of cord back through the cord-guide and for pro ducing slack in the cord before the start of the next sewing'period to obviate the denger of slippage of the cord relative to the initial stitches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US83210A 1926-01-23 1926-01-23 Cord-handling mechanism for buttonhole-sewing machines Expired - Lifetime US1646946A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US83210A US1646946A (en) 1926-01-23 1926-01-23 Cord-handling mechanism for buttonhole-sewing machines
GB16423/26A GB261648A (en) 1926-01-23 1926-06-30 Cord handling mechanism for buttonhole sewing machines
FR618745D FR618745A (fr) 1926-01-23 1926-07-10 Machine à coudre les boutonnières
DES75365D DE461791C (de) 1926-01-23 1926-07-21 Knopflochnaehmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83210A US1646946A (en) 1926-01-23 1926-01-23 Cord-handling mechanism for buttonhole-sewing machines

Publications (1)

Publication Number Publication Date
US1646946A true US1646946A (en) 1927-10-25

Family

ID=10077042

Family Applications (1)

Application Number Title Priority Date Filing Date
US83210A Expired - Lifetime US1646946A (en) 1926-01-23 1926-01-23 Cord-handling mechanism for buttonhole-sewing machines

Country Status (4)

Country Link
US (1) US1646946A (de)
DE (1) DE461791C (de)
FR (1) FR618745A (de)
GB (1) GB261648A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959700C (de) * 1953-07-14 1957-03-07 Union Special Maschinenfab UEberwendlichnaehmaschine mit Vorschubkesseln

Also Published As

Publication number Publication date
FR618745A (fr) 1927-03-18
GB261648A (en) 1926-11-25
DE461791C (de) 1928-07-02

Similar Documents

Publication Publication Date Title
US2889790A (en) Apparatus for producing piped garment openings
US1646946A (en) Cord-handling mechanism for buttonhole-sewing machines
US2780193A (en) Methods of producing piped garment openings
US1816308A (en) Thread-cutting mechanism for sewing machines
US2300585A (en) Article attaching machine
US857941A (en) Machine for forming knotted-thread fastenings.
US1711483A (en) Thread-controlling mechanism for buttonhole-sewing machines
US1352514A (en) Sewing-machine
US1650588A (en) Work-clamping mechanism for sewing machines
US1404727A (en) Thread cutting and nipping mechanism for sewing machines
US2294471A (en) Button sewing machine
US1820569A (en) Thread trimmer for sewing machines
US2174294A (en) Buttonhole-cutter safety device for automatic buttonhole sewing machines
US1234258A (en) Thread cutting and holding device for sewing-machines.
US1613634A (en) Thread-cutting mechanism for sewing machines
US2645192A (en) Automatic button-clamp lifting means
US1999145A (en) Article-attaching machine
US1369371A (en) Thread cutting and nipping mechanism for sewing-machines
US1600206A (en) Buttonhole-sewing machine
US1396111A (en) Buttonhole-sewing machine
US749776A (en) Buttonhole-sewing machine
US2063845A (en) Attachment for sewing machines
US3012529A (en) Lock stitch sewing machines
US1325707A (en) Thread-cutting mechanism for sewing-machines
US1208949A (en) Thread-cutting device.