US2197597A - Whip-stitching attachment for sewing machines - Google Patents

Whip-stitching attachment for sewing machines Download PDF

Info

Publication number
US2197597A
US2197597A US738872A US73887234A US2197597A US 2197597 A US2197597 A US 2197597A US 738872 A US738872 A US 738872A US 73887234 A US73887234 A US 73887234A US 2197597 A US2197597 A US 2197597A
Authority
US
United States
Prior art keywords
arm
looper
frame
whip
thread
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
US738872A
Other languages
English (en)
Inventor
Svadling Johan Bertil
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 US2197597A publication Critical patent/US2197597A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
    • D05B1/08—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making multi-thread seams
    • D05B1/18—Seams for protecting or securing edges
    • D05B1/20—Overedge seams

Definitions

  • the methods of whip-stitchingv hitherto known were based either on the use of special whipstitching machines which use, however, is limited to large tailors or ready-made clothes businesses 5, or on manual work which, on the other hand, is very expensive.
  • the present invention relates to means for rendering it possible to carry out whip-stitching at relatively small costs for tailor work as well as other-work, e. g., sack sewing.
  • the method consists in the fact that when using a common sewing-machine or similar device, the threads running in the machine are utilized for stitches through the material, whereas the whip-stitching operation proper is effected by means .of a thread r group of threads which by means of a looper or the like is introduced alternatively above and below the material laterally in relation to the direction. of movement ci the needle'of the machine.
  • the invention is characterized by the material moving forward without lateral motion and that the looper for whip-stitching thread is introduced ior every second (or every fourth) stitch alternatively above and below the odge of the material, the thread being for every second stitch passed around the upper thread at the entrance and issue places thereof into andout of the material and for every second stitch.
  • the invention is further characterized by whipstitching means, which will be more fully described according as the following description' proceeds.
  • Figs. l to 4 show front views of an apparatus to be applied to a common tailor sewing machine in different positions of the apparatus
  • Fig. 5 is a pian view of a detail showing the arrangement oi the looper for the third thread.
  • Fig. 6 is a cross-section of said looper on an enlarged scale.
  • Fig. 'l is a diagrammatic View of the threads in the whip-stitching operation. 45;.. in the drawings, reference numeral 3 ⁇ ' designates the upper part oi the sewingwmachine table ⁇ and o?. the feeding device. 24 designates guides for needle bar 23 and 2
  • the device according to the invention comprises thefollowing parts but is not limited to parts of exactly this type, which only form a certain embodiment.
  • i designates aV frame preferably consisting of a vertical ⁇ plate ⁇ or the likev formed at its lower portion so as to provide a base plate 55 which may be secured to the machine table by means of a large'head screw
  • this frame carries the whole device for effecting whip-stitching, but, evidently, certain parts thereofv may be arranged in other manner than on the frame.
  • This means may consist of a ratchet-wheel 56 rotatable on a shaft lil and having teeth i4, every second oi which is provided withV a laterally projecting pin l5, said pins serving as support for the wire arm which bears either on two pins l5 simultaneously, as shown in Figs. 3 and li,v assuming then its lowermost position, or only on one pin i5, as. shown in Figs.
  • the guide 9 occupies its uppermost position.
  • the wire guide 9 is rigidly connected to the frame l, as at and adjacent said place the arm 9 is provided with a bent portion 59 so as to provide for a suiiicient resiliency to permit the wire arm 9 to bear on the pinsV l5. Consequently, the pins will determine the level of the wire guide and also that of the looper l, which according to the inventionis moved alternatively above and below thematerial 48.
  • an arm 20 In order to eiiect the movement of the looper 1 ⁇ and of the ratchet-wheel 56, an arm 20?
  • the loope'r' 1 will on account of the arrangement described obtain an inward and outward moveinentin relation to the frame i, when the needle 22 moves up and down whereby the whip-stitching operation: is rendered possible'.
  • movtheratchebwheel 56 different-means may be used.
  • the movement of the ratchet wheel 55 may be obtained directly from the arm 20 by an enlargement thereof or by a link secured to said arm 25 and engaging the teeth of the wheel which link follows the movement of the arm, the fulcrum of the link being preferably guided in a slot in the frame I, when the ratchet-wheel and the arm are situated on opposite sides of said frame as in the embodiment shown.
  • an arm II] is by means of a pin I8 pivotally connected with the bar 5, said arm moving to and fro above the ratchet-wheel 56 causing, on acount of the reciprocating movement of the bar 5 by means of a tooth I I, rotation of the six-toothed wheel ⁇ 56 through one tooth pitch.
  • the ratchetwheel may have another number of teeth, as for instance 4 or 8.
  • the arm I 0 is held pressed against the ratchetwheel lby means of an arm 31, which is actuated by a spring 4I and rotatably mounted on a pin 38, said arm 37 carrying a part 39 effecting the pressure.
  • the spring 4I is mounted on pins 4U and 42.
  • a pawl I7 is provided rotatably mounted on a pin I3 secured to the frame I and having its arm I 6 actuated by a spring 34 secured to a pin 36.
  • the direction of rotation of the ratchetwheel may be opposite to that shown in the ydrawings in which case the pawl I'I has another position.
  • the looper 'I is provided with a slot 46 for the thread 45, which is fed from a reel (which may be vertically arranged on the base plate 55) to a loop 44 secured to the frame I and through a hole 57! close by the looper l, the thread then passing through the eye 58 at the end of the looper.
  • the thread 45 hangs freely downwards.
  • the looper 'I has the slot I6 formed longitudinally thereof.
  • Base plate 55 has mounted thereon a plate 2 ⁇ which supports the material at the point of piercing thereof by the sewing machine needle.
  • Said plate 2 has a raised portion which lifts the material above the base plate 55 in order that the looper 'I may be inserted between said base plate 55 and the underneath side of the material together with the raised portion of said plate 2.
  • Fig. 5 which also illustrates how the pressure foot 6I must be arranged.
  • this foot must not as in common sewing machines be provided with Shanks which extend on opposite sides of the needle.
  • the common pressure foot of a sewing machine if said foot is adapted to be turned aside in such a manner that the shanks do not prevent the movement of the looper 'I.
  • a part 6I may, for instance, be provided having its lower face approximately the shape shown in Fig. 5, and on said part the pressure foot of the machine may rest so as not to extend l down to the material, the pressure against the material being effected by said part 6I.
  • Figs. 1 to 4 show different positions of the needles in relation to each other and to the material.
  • the looper 'I occupies its innermost and highest position.
  • the looper I moves outwardly of the machine above the material making the loop 52 and takes up the position shown in Fig. 2.
  • Figs. 3 and 4 illustrate how the thread loop 5I is formed from the thread 45 around the lower thread.
  • Apparatuses for carrying out the method of whip-stitching according to the invention may be constructed in different manners.
  • sewing-machines are built together with an apparatus according to the invention applied directly on the machine in such a manner that it can easily be turned aside when not in use.
  • whip-stitching machines may be built for carrying out the present method for whip-stitching with three threads.
  • whip-stitching operation proper to use a .group of threads or more than one looper and more than one thread or group of threads.
  • a device for whipstitching fabrics in combination with an ordinary sewing machine comprising a frame detachably mounted on the bed of said sewing machine, a device connected with said frame for lifting the fabric up over its main guiding plane at the place for piercing the fabric by the needle of the sewing machine, an arm slidably mounted on said frame, a whipstitching looper mounted on one end of said arm for introducing a continuous thread around the stitches of the sewing machine at the place for said piercing alternatively above and below the fabric, said whipstitching looper being arranged to move alternatively in and out over and under the border of the fabric, and means mounted on said frame and driven by the sewing machine for actuating said arm in order to impart the desired motion to the whipstitching looper.
  • a device for whipstitching fabrics in combination with an ordinary sewing machine comprising a frame detachably mounted on the bed of said sewing machine, a stationary support connected with said frame for lifting the fabric up over its main guiding plane at the place for piercing the fabric by the needle of the sewing machine, an arm slidably mounted on said frame, a whipstitching looper mounted on one end of said arm for introducing a continuous thread around the stitches of the sewing machine at the place for said piercing alternatively above and
  • a device characterized in that the stationary support consists of a plate like part which projects from the detachable frame in underthe fabric leaving a space free 75 for the whipstitching looper between its underside and the main guiding plane for the fabric.
  • a device for whipstitching fabric in combination with an ordinary sewing machine comprising a frame detachably mounted on the bed oi said sewing machine, an arm slidably and pivotally mounted on said frame, a looper support mounted on one end of said arm, a straight looper mounted in said looper support for introducing a continuous thread around each piercing of said fabric by the needle of said sewing machine, a1- ternatively above and then below said fabric, means for actuating said arm in order to impart the desired motion to said thread introducing looper comprising a means for giving said arm a horizontal reciprocation comprising an arm pivotally mounted on said frame and pivotally connected at one end to the needle holder of said sewing machine, said arm having a slot formed in its other end, and an L-arm pivotally mounted at its vertex to said frame and havinga projection mounted within the slot formed in said second mentioned arm, a straight arm pivotally connected at one end to said rst mentioned arm and its other end pivotally connected to said L-arm and a means for giving said
  • a device characterized in that the stationary support consists of a plate like part which projects from the detachable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US738872A 1933-08-24 1934-08-07 Whip-stitching attachment for sewing machines Expired - Lifetime US2197597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE425669X 1933-08-24

Publications (1)

Publication Number Publication Date
US2197597A true US2197597A (en) 1940-04-16

Family

ID=20309761

Family Applications (1)

Application Number Title Priority Date Filing Date
US738872A Expired - Lifetime US2197597A (en) 1933-08-24 1934-08-07 Whip-stitching attachment for sewing machines

Country Status (6)

Country Link
US (1) US2197597A (me)
BE (1) BE404815A (me)
DE (1) DE633705C (me)
FR (1) FR777430A (me)
GB (1) GB425669A (me)
NL (1) NL41080C (me)

Also Published As

Publication number Publication date
DE633705C (de) 1936-08-10
FR777430A (fr) 1935-02-20
NL41080C (me)
GB425669A (en) 1935-03-19
BE404815A (me)

Similar Documents

Publication Publication Date Title
US2218785A (en) Prebuilt mattress and box spring border machine
US2158197A (en) Sewing machine
US2197597A (en) Whip-stitching attachment for sewing machines
US2321747A (en) Overcasting device for sewing machines
US2884882A (en) Sewing machine with finger to control bobbin thread
US1855254A (en) Cross thread laying mechanism for sewing machines
US2208992A (en) Sewing machine and attachment therefor
US2491457A (en) Multiple needle stitching mechanism
US2573043A (en) Chenille sewing machine
US2483466A (en) Quilting machine
GB1160670A (en) Controlled Loose Stitching Mechanism for Chainstitch Sewing Machines
US1137122A (en) Sewing-machine.
US2275667A (en) Shoe stitcher
US1588134A (en) Intermittent-tension stitch-forming mechanism
US2407148A (en) Sewing machine
US2749858A (en) Bellows pleat folder attachment for sewing machine
US2540901A (en) Chenille sewing machine
US1988400A (en) Felling machine for seaming fabric sections
US2014687A (en) Sewing machine
US2024802A (en) Sewing machine
US2158430A (en) Whip-stitching device
US1926954A (en) Thread controlling device for cross thread laying mechanisms
US1967612A (en) Sewing machine
US561341A (en) richard
US2268799A (en) Sewing mechanism for stitching wire eye fasteners