US3000333A - Zig-zag sewing machine with variable sewing cycle - Google Patents

Zig-zag sewing machine with variable sewing cycle Download PDF

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Publication number
US3000333A
US3000333A US525177A US52517755A US3000333A US 3000333 A US3000333 A US 3000333A US 525177 A US525177 A US 525177A US 52517755 A US52517755 A US 52517755A US 3000333 A US3000333 A US 3000333A
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United States
Prior art keywords
cam
lever
shaft
zig
support
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Expired - Lifetime
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US525177A
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English (en)
Inventor
Moro Antonio
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.)
F?LLI BORLETTI SpA
Flii Borletti SpA
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Flii Borletti SpA
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Publication date
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • the machine according to the invention is characterized by the combination of means allowing for the application, beside the usual cam and on its shaft, of a removable cam responding to a determined zig-zag sewing cycle, with a mounting of the lever driving the oscillating support such as to allow said lever to be displaced from the usual cam to the removable cam by sliding on its rotating pin, without displacing said support.
  • the machine can also be arranged for rectilinear sewing, this being obtained, in a known manner, by shifting the shaft sliding in the oscillating support and carrying the pivoting center of the rod actuating the needle bar, so as to bring said pivoting center in coinci dence with the oscillation center of said support.
  • the rod arranged in the above manner does not receive any movement when both the lever driven by the cam and the support caused to oscillate by said lever, are moved, so that the needle bar is not transversely displaced during its reciprocating movement.
  • the modification consists in that the machine, besides the two cams, also carries as a bearing for the oscillating lever, a member formed so as to leave still the lever bearing thereupon and in that means adapted to be controlled from outside of the frame are provided for setting the oscillating lever either on one or the other of said cams or on the member which 'makes it remain at a standstill, according to the case. 1 t
  • the bearing member making the lever remain at a standstill can be, for example, a cylinder with smooth "ice surface mounted on the same shaft of the cams, or a simple plane surface arranged on the machine and independent of said shaft.
  • the means for displacing and setting in place the oscillating lever consists in a pushing device acting on a sleeve rigidly connected to said lever and apt to slide on the rotation pin thereof, having a suitable length, said device being combined with one or more springs apt to co-operate therewith for exactly establishing the lever in the required position.
  • FIG. 1 is a longitudinal section of the machine
  • FIG. 2 is a cross section of said machine according to the broken line A-A of FIG. 1;
  • FIG. 3 is a partial cross section of the machine according to the line BB of FIG. 1;
  • FIG. 4 shows in plan view a simple means for displacing and guiding the lever for driving the oscillating support from the usual cam to the other cam and vice versa.
  • FIG. 5 shows the zigzag stitch on the three starting positions which can be obtained by adjusting the setting of the oscillating support. 7
  • FIG. 6 is a plau' view, partly in section, of an embodiment of the modification of the invention for the displacing device of the oscillating lever and the positions of putting in place that said lever can receive;
  • FIG. 7 is a side view of this embodiment.
  • FIG. 8 shows a detail of the maneuvering handgrip of the displacing device of the oscillating lever according to FIGS. 6 and 7;
  • FIG. 9 shows in plan view, partly in section, a further embodiment of said modification
  • FIG. 10 is a side view of an embodiment according to FIG. 9.
  • the shaft 1 which in known manner can be driven either by motor or pedal, is mounted in the upper portion of the frame 2 of the machine.
  • the crank pin 3 and the connecting rod 4 it imparts the vertical reciprocating movement to the needle bar 5.
  • the crank 6 of the shaft 1 imparts the reciprocating motion to the connecting rod 7, which, on its turn, through the lever 8, the shaft 9 and the pair of toothed bevel wheels 10, causes the oscillation of the hook 11.
  • the stitch formation can be formed in known manner.
  • the shaft 1 carries the worm 13 engaging with the worm Wheel 14 secured onto the shaft 15 at right angles to the shaft 1.
  • Worm 13 and wheel 14 are proportioned in such a manner as to cause the shaft 15 to turn at a lower speed than the shaft 1 according to a suitably established ratio.
  • On the front portion of the shaft 15 the cam 16 is secured.
  • against the periphery of this cam bears the end-'18 of the lever 19 pivoted on the shaft 2!, the adherence of the end 18 on the surface 17 being assured by the spring 21.
  • To the lever 19 is rigidly connected the arm 22 having a forked end 23 which engages the pin 24 carried by a support 25 which is pivotally mounted on a pin 26 carried by the support 35, the latter being pivotally mounted on the pin 35' (FIG.
  • the support 25 has two arms 27 and 28 which are provided with coaxial holes 27 and 28' wherein can slide the shaft 29 upon which the forked end 30 of a rod 31 is centrally pivoted.
  • the other end of rod 31 is pivoted on a projection of the support 32 of the needle bar 5.
  • This support is connected to the frame 2 in 33 by means of the small elastic plate 34.
  • the zig-zag formation of the stitch depends on the oscillation imparted to the 3 support 32 by the rod 31 under the action of the lever 19 driven by the cam 16.
  • the support 35 pivoted on the pin 35' is prolonged into a lower arm 36 having a forked end.37, which embraces a cylindrical projection of a piece 39 pivoted on 40.
  • the elastic plate 41 which at its upper end carries the handling button 42.
  • the link 44 On the pin 43 of the fork 30 is pivoted the link 44, which at its lower end is pivoted on the pin 45 of the sleeve 46.
  • This sleeve is provided with an arm 47 upon which the pin 48 with button 49 is mounted.
  • the surface 17 of the cam 16 is formed in such a manner that the cross displacement of the needle bar may be in synchronism with the axial displacements of said bar. There will thus be obtained a stitch at the right and a stitch at the left when the needle bar is regulated for zig-zag sewing, and the rectilinear sewing when said bar is accordingly adjusted.
  • the transversal origin of the zig-zag stitch is established by the button 42, by means'of'which, through the plate 41, the piece39, the arm 36 and the support 35, the position of the support 25 is caused to vary at small angles by fixing the pin 26 of said support generally in one of the three positions: central, to the right and to the left.
  • the central rectilinear sewing, or the zigzag sewing symmetric with respect to the central right line (FIG. 5a); the rectilinear sewing to the left or the zig-zag sewing with origin to the left (FIG. 5b); and the rectilinear sewing to the right or the zig-zag sewing with origin to the right (FIG. 50).
  • the cam 16 is employed only for the common zig-zag sewing with hand adjustment and control of both the zig-zag amplitude and its origin.
  • a second removable cam To the cam 16 there can be coupled a second removable cam, said second cam being mounted on the same shaft of the cam 16 or, preferably, on its hub.
  • This second cam 50 is shaped for a deter-mined cyclically varying of the zigzag sewing.
  • the end 18 of the lever 19 When'it-is desired to place cam 50in operation, the end 18 of the lever 19 is brought into contact with the periphery 51 by displacing it from the surface 17 of the cam 16, which thus remains inoperative.
  • the transfer of the lever 1819 from the cam 16 to the cam 50 is obtained by causing the piece 19-22 to axially slide on the shaft 20 by means, inthe embodiment shown in FIGS. 1 to 4, of a button 52 fixed on the lever 19.
  • a pin 53, carried by the hub of the piece 1922 is engaged in a slot 54 with notches of a plate 55 fixed to the frame 2 so that for passing from the first cam to the second one, the lever 19 must at first be caused to turn in order to be removed from the first cam, then be caused to axially slide and at last caused to come into contact with the second cam, on which it is maintained in contact therewith by the spring 21.
  • the fork 23 remains always engaged with the pin 24, the latter having a length sufiicient for allowing the sliding of the piece .19 22.' If it is desired to exclude the, second cam and to return to the first one, the button 52 will be operated in the reverse manner.
  • the needle can take up in the cross direction up to twenty different positions (one for each stitch) during one revolution of the cam, this cycle being continuously repeated.
  • the cam 50 can be easily removed and substituted by any other cam for a different type of sewing. by unscrewing the knurled button 56.
  • a spring 57 (FIG. 3) serves to facilitate the removal of the cam 50 from the cam 16, when the button 56 is unscrewed, in order to substitute said cam 50 with a cam of any other type.
  • cams and levers can be reached through a window covered by the plate 58, said window being arranged on the side of the machine frame facing the said cams.
  • the button 49 is made use of.
  • the movement of the button 49 can be limited by arranging suitable stops 59 located in the desired position in the window in which the button 49 slides; said stops are blocked each by a button 60 with threaded stem screwed in projections of said stops.
  • the stem 48 of the button 49 having the portion 61 of greater diameter is held in a predetermined position by a stop 59.
  • the sleeve 64 rigidly connected to the lever 19 and adapted to slide on the shaft 20, has a groove 65 within which pin 66 carried by the small lever 67 mounted on the bushing 68 is maintained, the latter being pivoted on the pin 69.
  • a bell crank lever On the bushing 68 is loosely mounted a bell crank lever, one arm 70 of which is lying upon the small lever 67, and the other arm 71 of which is terminated, in a position accessible to the operator, by a hand grip 72 adapted to be handled by the latter.
  • the arm 71 is suitably elastic and it is bent in such a manner as to slightly bear on the lower surface of the small bridge 73.
  • This bridge 73 has three notches (or holes) 74a, b, c; the projection 75 formed on the upper side of the lever arm 71 can penetrate into one or another of said notches, so that the lever 7071 remains locked in one of these three positions.
  • the lever 67 is maintained in phase with the arm 70 of the lever 70-71, by the two ends, suitagy bent, of the spring 76 wound about the bushmg.
  • the lever 18, 19, 22 is on the cam 16 and it is desired to transfer it onto the cam 50, it is sufiicient to slightly press, according to the arrow 76, the hand grip 72, so as to cause the projection 75 to come out of the central hole 74b, and then to displace said hand grip according to the arrow 77, by leaving it free, when the projection 75 is in register with the hole 74a.
  • the end 18 finds, in this moment, a projection of the cam 50, said projection causing said end to stop, the lever 70, 71 can still be moved, but the pin 66 and the lever 67 remain stopped locking thus the end 76a of the spring 76, while the other end 76b of the spring 76 displaces itself together with the arm 70, increasing the charge of the spring 76 and the pressure of the end 76a on the lever 67.
  • the cam 50 has turned more than one step, the end 18 will be, in a given moment, in the uppermost position 18, so that it will be able to move adjacent the periphery of cam 50, which in this position has a radius smaller than or at most like that of the cam 16 for the same angular position.
  • the transfer is caused by the end 76a of the spring 76, which, having a suificient charge, pushes the small lever 67 in the normal position corresponding to that of the arm 70.
  • the same operation is obtained when the lever 71 is moved into register with the hole 7411 or 740.
  • the lever 18, 19 will then be moved into contact with the cam 16 or the member 79, respectively.
  • the member 79 in the shown example is a cylinder rotating wtih the cams.
  • FIGS. 9 and 10 it can be seen that with the shaft 20 there is a coaxial shaft 20, on which is mounted a sleeve 64'.
  • the shaft 20' rotates in bearings formed on the frame 2 of the machine, while it is prevented from axial displacement by a button 72 and a ring 80 mounted thereon on the outside and inside of frame 2, respectively.
  • the sleeve 64 of the lever 18, 19, 22 carries a projection having the form of a tooth or pin 66', which is kept always in contact with the surface 65' of the sleeve 64 by the spring 76'a.
  • This sleeve can slide on the shaft 20' and has a length corresponding to the greatest displace ment of the lever 19 for passing from the first cam to the cylindrical member 79, which leaves lever 19 stationary, but it cannot turn on the shaft 20 due to a pin 81 arranged in the slot 82 thereof.
  • the right hand end of the slot 82 is kept in contact with the pin 81 by the spring 76'a, which is stronger than the spring 76b.
  • the periphery 65' is shaped in such a manner that starting from a fiat portion 65a of periphery 65' there follows an inclined portion 6S'b, the latter being followed by a flat portion 65c, to which an inclined portion 65'd and a fiat portion 65'e follow, in sequence.
  • the axial distance between the flat portions of sleeve 64' is equal to the distance between the cams.
  • the operation of the device is as follows.
  • the lever 19 bears on the cam 16, it means that it is in this position because the pin 66 is bearing against the flat portion 65'c. If it is desired to transfer said lever onto the cam 50, the button 72 is rotated according to the arrow 77; the sleeve 64' turns with this button and the inclined surface 65'd pushes according to the arrow 78 the pin 66' and consequently the lever 19.
  • the button 72' has three positions in the revolution cycle, each of them defined by a snapping stop, not shown in the drawings. Each position corresponds to the coincidence of the pin 66 with one of the surfaces 65'a, 65'c, 65'e, that is to one of the three positions of the lever 19, 18.
  • the lever operates in accordance with that described in the embodiment according to FIGS. 6 to 8.
  • a zig-zag sewing machine comprising a frame, a main shaft, a needle bar, means operatively connected to said main shaftand needle bar to impart vertical oscillatory motion to said needle bar, an oscillating support,
  • a generally horizontal rod pivotally connected to one end of said needle bar and at its other end to said oscillating support, a first cam rotatably mounted in said machine on a camshaft, means for rotating said camshaft from said main shaft, a lever carried on a lever shaft having one end engaging said cam and the other end engaging verse movement of said needle bar, adjustable means connected to said support to rotate said support to vary the origin of the zig-zag stitch, a second cam removably mounted coaxially on a hub of said first cam, a spring being mountedbetweenthe two cams to thereby facilitate the removal of the removable cam when it is necessary .to substituteit with any other cam, a knurled button screwed on the shaft of the cams to retain said removable cam, and means for shifting said lever axially of the lever shaft for engaging either of said cams,
  • Ziz-zag sewing machine as claimed in claim 1, and further comprising an external wall having a small window shut by a plate facing said cams, said window permitting access to the interior of the frame for mounting or removing the removable cam.
  • a sewing machine as in claim 3 an axially removable stem supporting said control button, and a spring urging said control button away from said frame.
  • a zig-zag sewing machine comprising a frame, a main shaft, a needle bar, means operatively connected to said main shaft and needle bar to impart vertical oscillatory motion to said needle bar, at oscillating support, a generally horizontal rod pivotally connected to one end of said needle bar and at its other end to said oscillating support, a first cam rotatably mounted in said machine on a camshaft, means for rotating said camshaft from said main shaft, a lever carried on a lever shaft having one end engaging said cam and the other end engaging said support for imparting oscillatory movement to said support, adjustable means connected to saidsupport for varying the amplitude of the oscillatory movement imparted by said support to said rod for varying the transverse movement of said needle bar, adjustable means connected to said support to rotate said support to vary the origin of the zigzag stitch, a second cam removably mounted coaxially on a hub of said first cam, a'spring being mounted between the two cams to thereby facilitate the removal of the removable cam when it is necessary to
  • cam-like member is a cylinder with smooth surface mounted on the same shaft as the cams.
  • a zig-zag sewing machine comprising a frame, a main shaft, a needle bar, means operatively connected to said main shaft and needle bar to impart vertical 8 necessary to substitute it with any other cam, a knurled button screwed on the shaft of the cams to retain said removable cam, a cam-like member of Zero amplitude mounted in said machine, a pushing device acting on a first sleeve rigidly connected to said lever and adapted to slide on the lever shaft, and a second sleeve coaxial with said first sleeve and mounted for sliding movement only on a rotatable driving shaft acting on said second sleeve and opposing the movement thereof, said second oscillatory motion to said needle bar, an oscillating support, a generally horizontal rod pivotally connected to one end of said needle bar andat its other end to said oscillating support, a first cam rotatably mounted in said machine on .a camshaft, means for rotating said camshaft from said main shaft, a lever carried on a lever shaft
  • Zig-Zag sewing machine as claimed in claim 9, wherein the sleeve connected to the lever driving the oscillating support is urged by a spring opposed by the spring acting on the second sleeve, said spring urging the first sleeve keeping the axial pin of said first sleeve adherent to the second sleeve.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US525177A 1954-08-06 1955-07-29 Zig-zag sewing machine with variable sewing cycle Expired - Lifetime US3000333A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT330082X 1954-08-06
IT250555X 1955-05-25

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US3000333A true US3000333A (en) 1961-09-19

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Application Number Title Priority Date Filing Date
US525177A Expired - Lifetime US3000333A (en) 1954-08-06 1955-07-29 Zig-zag sewing machine with variable sewing cycle

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US (1) US3000333A (fr)
BE (1) BE540370A (fr)
CH (1) CH330082A (fr)
FR (1) FR1143023A (fr)
GB (1) GB788081A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062164A (en) * 1958-09-08 1962-11-06 Riccar Sewing Machine Co Ltd Device for automatic zigzag sewing
US3356052A (en) * 1964-03-20 1967-12-05 Necchi Spa Pattern sewing device for sewing machines
US4159685A (en) * 1978-07-28 1979-07-03 The Singer Company Formation of variable width cutting space buttonhole patterns in an electronically controlled sewing machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296988A (en) * 1958-11-17 1967-01-10 Fukuske Kabushiki Kaisha Zigzag sewing machine
US3068817A (en) * 1960-04-26 1962-12-18 White Sewing Machine Corp Zig-zag sewing machine
US3035534A (en) * 1960-06-14 1962-05-22 White Sewing Machine Corp Sewing machine

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190819184A (en) * 1908-09-12 1909-06-24 James Magowan Improvements in Zig-zag or Variable Stitch Sewing Machines such as are generally used in the Production of Embroidery Work.
US1470687A (en) * 1922-04-08 1923-10-16 Benton F Stitt Valve grinder
US2297197A (en) * 1938-05-31 1942-09-29 Bolter Wilhelm Zigzag sewing machine
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
US2684649A (en) * 1950-07-25 1954-07-27 Vittorio Necchi S P A Device for embroidering automatically with zigzag sewing machines
US2693778A (en) * 1952-06-06 1954-11-09 Harris Carl Embroidering mechanism for zigzag sewing machines
FR1095914A (fr) * 1953-01-28 1955-06-07 Arnaldo Vigorelli Machine à coudre perfectionnée
FR1096140A (fr) * 1953-06-18 1955-06-09 Gegauf Fritz Ag Machine à coudre à points en zigzag avec agencement pour l'exécution de coutures décoratives
US2757626A (en) * 1951-10-06 1956-08-07 Fujita Kisaku Sewing machine
US2832302A (en) * 1952-05-31 1958-04-29 Singer Mfg Co Sewing machine
US2833233A (en) * 1954-05-27 1958-05-06 Singer Mfg Co Zigzag sewing machines

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190819184A (en) * 1908-09-12 1909-06-24 James Magowan Improvements in Zig-zag or Variable Stitch Sewing Machines such as are generally used in the Production of Embroidery Work.
US1470687A (en) * 1922-04-08 1923-10-16 Benton F Stitt Valve grinder
US2297197A (en) * 1938-05-31 1942-09-29 Bolter Wilhelm Zigzag sewing machine
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
US2684649A (en) * 1950-07-25 1954-07-27 Vittorio Necchi S P A Device for embroidering automatically with zigzag sewing machines
US2757626A (en) * 1951-10-06 1956-08-07 Fujita Kisaku Sewing machine
US2832302A (en) * 1952-05-31 1958-04-29 Singer Mfg Co Sewing machine
US2693778A (en) * 1952-06-06 1954-11-09 Harris Carl Embroidering mechanism for zigzag sewing machines
FR1095914A (fr) * 1953-01-28 1955-06-07 Arnaldo Vigorelli Machine à coudre perfectionnée
US2906219A (en) * 1953-01-28 1959-09-29 Vigorelli Arnaldo Embroidery stitching sewing machine
FR1096140A (fr) * 1953-06-18 1955-06-09 Gegauf Fritz Ag Machine à coudre à points en zigzag avec agencement pour l'exécution de coutures décoratives
US2833233A (en) * 1954-05-27 1958-05-06 Singer Mfg Co Zigzag sewing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062164A (en) * 1958-09-08 1962-11-06 Riccar Sewing Machine Co Ltd Device for automatic zigzag sewing
US3356052A (en) * 1964-03-20 1967-12-05 Necchi Spa Pattern sewing device for sewing machines
US4159685A (en) * 1978-07-28 1979-07-03 The Singer Company Formation of variable width cutting space buttonhole patterns in an electronically controlled sewing machine

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Publication number Publication date
CH330082A (fr) 1958-05-31
GB788081A (en) 1957-12-23
FR1143023A (fr) 1957-09-25
BE540370A (fr)

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