US1950570A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
US1950570A
US1950570A US642052A US64205232A US1950570A US 1950570 A US1950570 A US 1950570A US 642052 A US642052 A US 642052A US 64205232 A US64205232 A US 64205232A US 1950570 A US1950570 A US 1950570A
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United States
Prior art keywords
thread
lever
shoe
stitch
thread finger
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
US642052A
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English (en)
Inventor
Ricks Fred
Allcock Harry Brookshaw
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United Shoe Machinery Corp
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United Shoe Machinery Corp
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 United Shoe Machinery Corp filed Critical United Shoe Machinery Corp
Application granted granted Critical
Publication of US1950570A publication Critical patent/US1950570A/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B15/00—Machines for sewing leather goods
    • 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
    • D05D2303/02—Tape

Definitions

  • This invention relates to sewing machines and is particularly, but by no m ans exclusively, concerned with boot or shoe inseam sewing machines ior use in sewing together the welt, upper and insole of a welt shoe or the upper and sole of a turn shoe.
  • One of the several objects of the present in vention is to provide in a welt and turn shoe sewing machine means whereby a seam of substantially uniform tightness may readily be sewn at the sides and round the toe of the same shoe and accordingly one of the several features of the present invention resides the provision in a welt and turn shoe sewing machine of means whereby the operator of the machine can, without stopping the sewing operation on a shoe, cause a less amount of thread to be available for forming the stitches round the toe than at the sides of a shoe.
  • Fig. l is a side elevation of parts of a welt shoe sewing machine embodying a mechanism for controlling the amount of (Cl. ll258) thread available when sewing along the sides and round the toe of a shoe according to the present invention, the parts of the said mechanism being shown in relative positions they occupy at the beginning of the sewing round the toe;
  • Fig. 2 is a view similar to Fig. 1 with the parts of the mechanism in the relative positions they occupy when sewing is being performed along the sides of a shoe;
  • Fig. 3 is a side elevation of parts of the machine on an enlarged scale, the mechanism for controlling the supply of thread being shown in detail and in the relative positions they occupy subsequent to those of Fig. 1, and just before the parts assume the positions of Fig.
  • Fig. 4 is a front elevation of the same parts of the machine on the same scale as Fig. 2, and in positions corresponding to those shown in Fig. 1;
  • Fig. 5 is a front elevation similar to that shown in Fig. 4, parts of the mechanism being removed and shown in section;
  • Fig. 6 is a side elevation of parts of the machine last referred to on a still further enlarged scale, and a section of a welt shoe being sewn at the side; and
  • Fig. 7 is a View similar to Figure 6, but showing at the same time in the machine cycle the said parts and a section of the shoe when the latter is being sewn at the toe.
  • the thread finger 5 is swung about its pivot 6 as usual by a link 7 connected by universal joints to the thread finger and to a cam operated slotted lever 8.
  • the link 7 is, however, connected to a treadle (or knee controlled) mechanism by which when the treadle is operated the end 9 of the link is moved along the slot 10 in the lever 8 towards the pivot 11 of the lever.
  • the treadle controlled mechanism has associated with it a counting device which, after a predetermined number of stitches have been formed, after the end of the link '7 has been moved towards the pivot of the lever 8, automatically returns that end of the link '7 towards the outer end of the slot 10.
  • the cam lever 8 has a constant throw so that movement of the end 9 of the link 7 towards the pivot of the lever 8 reduces the throw of the thread finger 5 and therefore reduces the amount of thread drawn by the thread finger.
  • the operator is thus able to decrease the amount of thread available for each stitch when sewing round the toe of a shoe with a view to ensuring that equally tight sewing is eifected around the toe as at the sides.
  • the position which the end 9 of the link 7 takes up towards each end of the slot 10 may be adjusted so that the amounts of thread available when sewing along the side of a shoe and round the toe may respectively be predetermined by the operator according to the thickness of the materials to be sewn together or any other changing conditions between parts of one and the same shoe, or between different batches of work which may render such adjustment desirable.
  • the link 7, hereinbefore referred to as being connected to a counting device, has pivotally connected to its end 9 an upwardly extending link 14 which at its upper end is pivotally connected to a rearwardly extending arm 15 which is rotatably mounted on a horizontal shaft 16 extending across the machine and fixed to the machine frame.
  • the arm 15 has fixed on it a pair of plates 17, 18 which are relatively adjustable on the arm round the axis of the shaft 16.
  • a stud l9 fixed in the machine frame which limits the movement of the arm 15 in both directions.
  • a pin fixed in a controlling lever 21 which is pivoted on a horizontal shaft 22 extending across the machine and positioned behind and slightly below the shaft 16 on which the plate-carrying arm 15 is mounted.
  • the controlling lever 21 By moving the controlling lever 21, the end 9 of the link '7 can be moved up or down in the slot 10 of the cam lever 8 and by adjusting the plates 17, 18 the position of the end 9 of the link '7 may be varied at each end of its movement along the slot.
  • the gap between the edges of the plates at the front of the shaft 16 is increased or decreased and the gap at the rear of the shaft 16 is correspondingly decreased or increased and more or less lost motion takes place between the pin 20 and the edges of the plates 17 and 18 at the rear of the shaft 16 when the controlling lever 21 is moved by means of a treadle or knee lever as hereinafter described through a uniform distance when the treadle is depressed or when the treadle is released and the controlling lever 21 is returned by a spring hereinafter described
  • the controlling lever 21 has fixed to it by a screw 51 a treadle or knee lever operated arm 23 pivoted on the same shaft 22 as the controlling lever 21.
  • a spring 27 connected to the arm 23 and the machine frame tends to swing the arm 23 and the controlling lever 21 in such a direction that the end 9 of the link 7 is normally near the lower end of the slot 10 (as shown in Fig. 2) and movement of the treadle or knee lever moves the end 9 towards the upper end of the slot.
  • the treadle or knee lever has been operated to swing the controlling lever 21 (always through a uniform distance) and raise the end 9 of the link 7 in the slot, the treadle is released and the controlling lever 21 is held in this position by a stud 24 which engages a face 25 on a lug on the controlling lever 21 (as shown in Fig. 1).
  • the stud 24 is fixed in a latch arm 26 which is pivoted on.
  • a ratchet lever 28 Pivoted on the same shaft 22 as the controlling lever 21 and between the controlling lever 21 and arm 23 is a ratchet lever 28 having fixed on it a segment on the edge of which is formed a row of ratchet teeth 29.
  • a pawl 30 is pivoted on the usual needle guide actuating lever 31 of the machine, which oscillates to and fro once during each cycle of the machine, is held in engagement with the ratchet teeth by a spring (not shown) and moves the ratchet lever one step during each cycle of the machine.
  • a retaining pawl 32 which is pivoted on the controlling lever 21 and is urged by a spring into engagement with the ratchet teeth 29.
  • the ratchet lever 28 has in it a pin 33 which, after a predetermined number of cycles of the machine have been performed, engages a lug 34 on the latch arm 26 and swings the latch arm 26 in a direction to move the stud 24 on the latch arm 26 away from the face 25 on the lug on the controlling lever 21.
  • the controlling lever 21 is then returned by the spring 27 and moves the end 9 of the link '7 towards the lower end of the slot 10 until the plate 18 engages the stud 19.
  • a roll 35 on the lever 21 engages a tail 36 on the ratchet pawl 30 and swings the pawl away from and holds it out of engagement with the ratchet teeth 29 so that the oscillation of the needle guide lever 31, when the end 9 of the link 7 is at the lower end of the slot 10, does not actuate the segment lever.
  • the retaining pawl 32 engages an adjustable eccentric 37 on the end of the stud on which the pawl 30 is pivoted and the retaining pawl is swung away from the ratchet teeth so that the ratchet lever 28 can be returned by the spring 52 associated with the latch arm which is connected to the latch arm and to the ratchet lever.
  • the pin 33 in the ratchet lever is movable into one or other of a number of holes in the ratchet arm 28 which are different distances away from the lug 34 on the latch arm 26 into engagement with which the pin 33 is moved after a predetermined number of cycles of the machine have been performed.
  • the number of cycles preferably 6, 8, 10 or 12 will be performed before the end 9 of the link is automatically returned to the lower end of the slot 10.
  • a pawl 53 is pivoted on a block 54 fixed to the treadle or knee lever operated rod 55.
  • the pawl engages a lug 56 on a block 57 pivotally connected to the arm 23 which is fixed to the controlling lever 21.
  • the pawl 53 is disengaged from and held out of engagement with the lug 56 after the treadle has been depressed to actuate the controlling lever by a pin 58 on the ratchet lever 28, which pin'engages a tail-59 on the pawl 53 when that lever has been moved one or two steps by its pawl 30, as shown in Fig. 3. Since, as hereinbefore described, the ratchet lever 28 does not return until after the controlling lever 21 has returned, the pawl 53 cannot re-engage the lug 56 until after the end 9 of the link '7 has returned towards the lower end of the slot 10.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, and means operable during the continued operation of the machine for causing a less amount of thread to be available for forming stitches around the toe than at the sides of the shoe.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, and means for causing the thread finger to draw a less amount of thread during the continned operation of the machine in forming stitches round the toe of a shoe than at the sides of the shoe.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, and means under the control of the operator for varying the thread drawing movement of the thread finger during the continued operation of the machine in sewing a seam.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper, and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, and means acting automatically after a predetermined number of stitches to vary the thread drawing movement of the thread finger.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper, and a thread finger, mechanism for actuating the thread finger to draw a supply of thread during the formation of each stitch, means under the control of the operator for adjusting the thread finger actuating mechanism during the continued operation of the machine to vary the thread drawing movement of the thread finger, and means acting automatically after a predetermined number of stitches to restore the thread finger actuating mechanism to its original condition.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, a lever for operating the thread finger provided with a slot, connections between the operating lever and the thread finger comprising a link arranged at one end for sliding movement in the slot of the operating lever to vary the movement of the thread finger, and means under the control of the operator for shifting the link'along the slot during the continued opera tion of the machine in sewing a seam.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, a lever for operating the thread finger provided with a slot, connections between the operating lever and the thread finger comprising a link arranged at one end for sliding movement in the slot in the operating lever to vary the movement of the thread finger, and means for automatically shifting the link along the slot during sewing of a seam.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, a lever for operating the thread finger provided with a slot, connections between the operating lever and the thread finger comprising a link arranged at one end for sliding movement in the slot in the operating lever to vary the movement of the thread finger, mechanism actuable after the formation of a predetermined number of stitches, and means operated from said mechanism for shifting the link along the slot.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, a member under the control of the operator, a latch for maintaining the member in operated position, connections between said member and the actuating means for the thread finger for causing the thread drawing movement of the thread finger to vary, and mechanism actuable after the formation of a predetermined number of stitches to release said latch and permit return of said member to its original position.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a loo-per and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, a member under the control of the operator, a latch for maintaining the member in operated position, connections between said member and the actuating means for the thread finger for causing the thread drawing movement of the thread finger to vary, mechanism actuable after the formation of a predetermined number of stitches to release said latch and permit return of said member to its original position, and means for preventing manual retention of said member in operated position after the release of said latch.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper, and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, a member under the control of the operator, a latch for maintaining the member in operated position, connections between said member and the thread finger, actuating means for causing the thread drawing movement of the thread finger to vary, a latch releasing device, ratchet teeth on the releasing device, and a pawl operated once during each stitch forming cycle for moving the latch releasing device one tooth of the ratchet to cause the releasing device to release the latch after a predetermined number of stitches.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper, and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, a member under the control of the operator, a latch for maintaining the member in operated position, connections between said member and the thread finger, actuating means for causing the thread drawing movement of the thread finger to vary, a latch releasing device, ratchet teeth on the releasing device, a pawl operated once during each stitch forming cycle for moving the latch releasing device one tooth of the ratchet, and adjustable means for causing the releasing device to release the latch after movement of the ratchet an amount predetermined by the adjustment of said adjustable means.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, means for actuating the stitch forming devices to cause the thread finger to draw a supply of thread during the formation of each stitch, means under the control of the operator for reducing during sewing of a seam the amount of thread drawn by the thread finger, and separately adjustable means for increasing or decreasing the amount of thread which may be drawn by the thread finger when the thread reducing means is operated.
  • a chain stitch shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a looper and a thread finger, a lever for operating the thread finger, provided with a slot, connections between the operating lever and the thread finger comprising a link arranged at one end for sliding movement in the slot of the operating lever to vary the movement of the thread finger, means under the control of the operator for shifting by a predetermined amount the position of the link along the slot during sewing of a seam, and separately adjustable means for increasing or decreasing the amount by which the link is shifted when the link shifting means is operated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Sewing Machines And Sewing (AREA)
US642052A 1931-12-11 1932-11-10 Sewing machine Expired - Lifetime US1950570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34353/31A GB393649A (en) 1931-12-11 1931-12-11 Improvements in or relating to sewing machines

Publications (1)

Publication Number Publication Date
US1950570A true US1950570A (en) 1934-03-13

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ID=10364586

Family Applications (1)

Application Number Title Priority Date Filing Date
US642052A Expired - Lifetime US1950570A (en) 1931-12-11 1932-11-10 Sewing machine

Country Status (3)

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US (1) US1950570A (de)
FR (1) FR747391A (de)
GB (1) GB393649A (de)

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Publication number Publication date
FR747391A (de) 1933-06-14
GB393649A (en) 1933-06-12

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