US3081724A - Zig-zag sewing machine - Google Patents

Zig-zag sewing machine Download PDF

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Publication number
US3081724A
US3081724A US13587A US1358760A US3081724A US 3081724 A US3081724 A US 3081724A US 13587 A US13587 A US 13587A US 1358760 A US1358760 A US 1358760A US 3081724 A US3081724 A US 3081724A
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Prior art keywords
shaft
lever
cam
frame
cams
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US13587A
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English (en)
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Bono Luigi
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Necchi SpA
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Necchi SpA
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1503—Rotary to intermittent unidirectional motion
    • Y10T74/1508—Rotary crank or eccentric drive
    • Y10T74/1518—Rotary cam drive
    • Y10T74/1523—Radial cam

Definitions

  • FIGURE 1 is a front elevational view of a sewing machine with portions shown in section.
  • FIGURE 2 is a plan view of the machine shown in FIGURE 1 with parts broken away and shown in section.
  • FIGURE 3 is a perspective view of the various operating mechanisms.
  • FIGURE 4 is a perspective view showing particularly the means for controlling the various displacements of the needle bar.
  • FIGURE 5 is a plan view of the mechanism shown in FIGURE 4.
  • FIGURE 6 is a perspective view of the lever for operating the feelers cooperating with the respective cams.
  • FIGURE 7 is a diagrammatic view showing one type of sewing pattern.
  • FIGURE 8 is a similar view illustrating another type of sewing pattern.
  • FIGURE 9 is a perspective view of the device for transmitting to the cam carrying shaft the rotary movement with unidirectional releases.
  • FIGURE 10 is a view with parts in cross-section of a detail of FIGURE 9.
  • FIGURE 11 is a partial plan view of FIGURE 9.
  • FIGURE 12 is a cross-sectional view taken upon section line XII-XII of FIGURE 10.
  • FIGURE 13 is a diagrammatic view showing another type of sewing pattern.
  • FIGURE 14 is a perspective view showing the means for controlling the cam-carrying shaft with a continuous or stepwise rotary movement.
  • FIGURE 15 is a side elevational view with additional details of the means shown in FIGURE 14.
  • FIGURE 16 is a cross-sectional view taken upon section line XVI-XVI of FIGURE 15.
  • FIGURE 17 is a plan view of a portion of the device shown in FIGURE 14.
  • FIGURE 18 is a perspective view of the means for adjusting the stroke of the cloth feeder either manually or by means of a cam.
  • FIGURE 19 is an elevational view of a detail of FIG- URE 18.
  • FIGURE 20 is a cross-sectional view taken upon section line XX-XX of FIGURE 19.
  • FIGURE 21 is a cross-sectional view of a detail of FIGURE 18.
  • FIGURE 22 is a crosssectional view taken upon secticn line XXII-XXII of FIGURE 21.
  • FIGURE 23 is a diagrammatic view illustrating the movements of the portions shown in FIGURE 18.
  • FIGURE 24 is a perspective view illustrating the means for detaching the feelers from the respective cams.
  • FIGURE 25 is a perspective view showing a detail of FIGURE 24.
  • FIGURE 26 is a plan view of a detail of FIGURE 24.
  • FIGURE 27 is a view similar to FIGURE 26 showing the parts in a different position.
  • FIGURE 28 illustrates diagrammatically another type of sewing pattern
  • FIGURE 29 is an elevational view with parts in crosssection showing the means for selecting the particular pattern desired.
  • the sewing machine illustrated by way of example in the figures comprises a frame 1 within which there rotates the upper shaft 2 which, through mechanisms known per se and not visible, transmits to the needle bar 3 reciprocating movements in a substantially vertical plane.
  • the needle bar 3, to which the needle 4 is applied, is located within the support 5.
  • the support 5 in turn is pivoted to the frame 1 in such a Way that the needle-bar can undergo displacements in the direction indicated in FIG. 1 by the arrow a, transversely with respect to the direction of feed of the cloth as effected by the feeder 6 acting in the base 7 of said frame 1.
  • the other end of rod 8 has a slot 11 ⁇ wherein there engage the screws 11 which fix the bar 12.
  • the slot 10 permits the adjustment of the overall length of the rod 8 and of the bar 12..
  • the forked lever 16 in turn is fulcrumed on the frame 1 by the pins 13 and 19.
  • a slot 29 of lever 16 engages the screw 21 which fixes the plate 22 to the lever '16.
  • the slot 249 permits adjusting the mutual angular position of the lever 16 and of the plate 22 around the common fulcrum represented by the pin 19.
  • the plate 22 carries a dowel 23 which presses lJlPOIl the cam 24, having a plurality of teeth, by the effect of the spring 25 Wound on the pin 19 and has its two ends anchored respectively to said plate 22 and to the frame 1.
  • the cam 24 is fixed to the gear 26 in engagement with the gear 27 (FIG. 16) fixed on the shaft 2, as more fully described below.
  • the feeler 28 forms part of "a lever 29 which is pivoted freely on the shaft 311 and is fixed in adjustable angular position to the upright 31, which in turn is pivoted freely on the shaft 30.
  • the shaft 39 is mounted in the frame 1 of the machine.
  • lever 29 may move with translatory movement rigidly with the upright 31 along the axis of the shaft 311 to bring its own feeler 32. into contact with any cam of the pile of cams 33 coaxial with the cam 24 and fixed to the shaft 34 mounted in the frame 1.
  • the means for controlling the rotations of the cam 33 are described below.
  • the pile of earns 33 is constituted (FIGS. 15 and 16) by some cams 33a having profiles varied in any manner, fixed to the shaft 34, by other cams 33b presenting profiles with constant radii and constituted actually by fixed steps provided in the frame 1, and finally by an interchangeable cam 33c.
  • lever 15 oscillates about its own pins 17 according to the movement of the feeler 32 op- 3 erated by the cams 33 and at the same time it oscillates about the pins 18 and 19 of the forked lever 16 according to the movement of the dowel 32 imparted by the cam 24.
  • the means for controlling automatically the position of the bar 12 in said groove 14 are obtained in the following way (FIGS. 4 and the bar 12 has a slot 35 within which is free to slide the pin 36 fixed on a lever 37.
  • the lever 37 in turn is fixed, together with the lever 33, to a shaft 39 mounted in the frame 1.
  • the lever 38 is connected to one end of the link 4% by means of the pin 41.
  • the pin 42 connects the other end of said link 4% to a further lever 43 which extends from the upright 44 freely pivoted on the shaft 45.
  • the shaft 45 in turn is mounted in the frame 1 of the sewing machine.
  • the lever 43 oscillates with the feeler 46 which is pivoted with its own bush 47 on the shaft 45 and carries a fork 48 which embraces the upright 4
  • the bush 47 carries in its interior a helical tooth 49 which cooperates with the helix Stl provided on the shaft 45, which permits in cooperation with means described below bringing the feelcr 46 into contact with any cam of the pile of earns 51 fixed to the shaft 34.
  • the lever 56 carries a projection 5% in contact with a profile 64 ⁇ provided on the cam 61 (FIG. 25) fixed to the 39.
  • the screws 62 fix to the cam 61 the handle 63 projecting from the slot 64 provided in the frame 1.
  • the eyelets 65 of the handle 63, in which the screws 62 engage, permit adjusting the mutual angular position between the handle 63 and the cam 61.
  • a small lever 66 (FIG. 5) which may be shifted by hand to two positions. In one of said positions, said small lever is inoperative; in
  • said forked lever 16 transmits oscillations to one end of the lever 15, the other end of which oscillates at the axis of the pins 18 and 19 by action of a cam of the cam of piles 33, acting through the feelers 32 and 28 of the lever 29.
  • the bar 12 in turn can slide within the grooves 14 of the lever 15 by the action of one of the cams of the pile of cams 51 or by operation of the handle 63 or by combined action of said cam and of said handle.
  • the bar 12 is connected to the support 5 of the needle bar 3 by the rod 8 and controls the displacements of said needle bar in the direction of the arrow a (FIG. 1), transverse to the direction of the cloth feed controlled by the feeder 6.
  • the needle bar 3 undergoes transverse displacements due only to the profile of said cam if the bar is displaced, within the slot 1% of the lever 15, at the axis of the pins 18 and 19 (FIG. 7a).
  • said needle bar undergoes only the maximum zigzag oscillations controlled by the cam 24- if the bar 12 is shifted at the axis of the pins 17 (FIG. 71)).
  • the sliding of the bar 12 towards the axis of the pins 17, contrary to the action of the spring 52, may be controlled either automatically by the fceler 46 acting upon the pile of cams 51, or by hand by the handle 63 movable within the slot 6 of the frame 1, or by simultaneous action of said feeler 46 and of said handle 63.
  • cams 51 or the handle 63 which during the normal operation of the machine have the function of controlling and adjusting the amplitude of the zigzag, during the operation of the machine with the small lever 66' pressing against the surface 67, have the function of reducing the transverse amplitude of the sewing designs controlled by the cams 33 or of varying the transverse position of the sewing line.
  • Said drum 70 is coaxial with a shaft 71 mounted in the frame 1 (FIG.
  • the spring 72 fixed at one side to the drum 70 and at the other side to the frame 1, ensures the above contact obliging the drum 71 to oscillate reciprocating in the direction of the arrow 51 and in the direction of the arrow c (FIG. 11) at every revolution of the upper shaft 2.
  • the spring 73 which embraces the cylindrical element '74 fixed to the shaft 71.
  • One end of said spring 73 is fixed to the drum 7% by the screw 75 cooperating with the plate 76, while the other end indicated in FIG. 11 with the numeral 77, is free.
  • the direction in which the spring 73 is wound is such that it grips the cylindrical member 7 1 and drags it along in rotation when the drum 7t oscillates in the direction of the arrow b.
  • the spring 73 Widens and slides on the cylindrical member 74, which, therefore, remains at a standstill in the position assumed previously, thanks also to the action of a brake which is constituted essentially by the spring 78.
  • Said spring 78 (FIG. 12) embraces the cylindrical member 74 and carries a first tongue 79 against which presses, by the effect of the spring 80, the small pin '81 mounted in the frame 1, and a second tongue 82 resting on the stop 83 provided on the frame 1.
  • the shaft 71 turns with unidirectional steps in the direction of the arrow b.
  • the eccentric 63 is fitted on the upper shaft 2 in such angular position that said steps are covered when the needle 4 is safely at top, out of the cloth.
  • To vary the ratio of transmission between the upper shaft 2 and the shaft 71 it is obviously necessary to vary the amplitude of the steps of said shaft 71.
  • the screw 89' fixes to the ring 84 a second ring 91) in convenient mutual angular position.
  • Said second ring 91 engages its own extension 91 in the slot 92 provided in the drum 7%.
  • the extension 91 interferes more or less with the free end 77 of the spring 73. If at the beginning of the rotation of the drum 711' in the direction of the arrow 11 the extension 91 does not interfere with said free end 77, the spring 73 immediately clamps the cylindrical member 74 and, therefore, said member rotates, fixed to the shaft 71, practically through the same angle as said drum 71?.
  • the button 83 is rotated in such a manner that at the beginning of the rotation of the drum 70 in the direction of the arrow b the extension 91 presses against the free end 77 of the spring 73, said spring 73 clamps the cylindrical member '74 only after said drum 76 has already rotated through such an angle as to detach said free end 77 from said extension 91.
  • the shaft 34 receives movement by unidirectional steps of adjustable amplitude as controlled by the shaft 71 through the gears 93 and 94.
  • the means for controlling the sliding of the bush 95 along the axis of the shaft 34 are realized in the following manner: between the collars 11. 2 of the bush 95 there is engaged the fork 1% of the rocker 19d fulcrurned on the frame 1 by the pin 105.
  • the arm 111 of said lever scans the cylindrical peripheral surface of the drum 113, which is interrupted by a projecting step 114.
  • the arm 112 feels the peripheral surface of a ring 115 which is rigid and coaxial with said drum 1'13 and which presents a recess 116 opposed to the projecting step 114 of said drum.
  • a button 131 which permits said drum 113 and said ring 115 to rotate rigid with the shaft 117, which is mounted in the frame 1.
  • the wire (harmonic wire) 107 rotates the rocker 104 around its own pin 1115 in such a way as to displace its own fork 1% upwards, so that the bush 95 slides on the shaft 34 and engages its own engaging teeth 93 with the engaging teeth 1% of the gear 26.
  • the harmonic Wire 1117 pushes the rocker 1114 to displace its own fork 103 downwards, in such a way that the bush 95 should slide on the shaft .34 and engage its own engaging teeth 99 with the engaging teeth 101 provided on the body of the gear 94.
  • the elastic means represented by the harmonic wire 167 permits the rotation of the shaft 117 rigid with the drum 113 and with the ring 115 also if the mutual angular position between the engaging teeth 98 and 1% or 99 and 1121 is momentarily such as to prevent said engagement.
  • the elasticity of the harmonic wire 167, or of any other equivalent means replacing it, permits also to stop the bush 95 in an intermediate position between the gears 26 and 94, in such a manner as to stop the rotation of the shaft 34 and of the two piles of cams 33 and 51 rigid therewith and so as to keep only cam 2-1 in rotation.
  • Said scissors-like member is constituted by two small a levers 120 and 121 which embrace the collars 162 of the bush and by two small levers 122 and 123 riding a member 124 fulcrumed by the pin 125 to the frame 1 and rigid with the actuating button 126.
  • the eyelets 127 which are provided in the small levers 121 and 122 and with which there engage the screws 123 which fix the small levers respectively to the small levers 123 and 120, permit adjusting the mutual position of said small levers.
  • the scissor 118 open on the collars 1112 and do not act to determine the position of. the bush 95 which so can slide upwards and downwards on the shaft 34 according to the angular position of the shaft 117.
  • the scissors 118 do not condition the position of the bush 95 and the pin 12 9 rigid with the member 124 presses against the extension 130 of the drum 7t ⁇ (FIG. 11), thereby detaching the shoe 69 of said drum from contact With the eccentric 68 fitted onto the upper shaft 2 and stopping thereby the shaft 71.
  • the means described in the preceding paragraph permit, therefore, to rotate the shaft 34 by intermittent motion with unidirectional strokes of adjustable amplitude, or to rotate it by continuous motion with a ratio of transmission fixed and equal to that of the rear 24 in respect to the upper shaft 2, or to exclude rotations of said shaft.
  • every sewing design that corresponds to one complete revolution of the shaft 34 can be obtained with a number of stitches more or less great according to the position of the button 88, and, therefore, may result more or less elongated, with equal length of one stitch (FIG. 8).
  • the unidirectional friction means that transforms the motion of the upper shaft 2 into an intermittent movement do not warrant however that every complete cycle of the sewing design is made with a rigorously constant number of stitches, but there will always be small irregularities, which however are fully compensated by the above possibility of elongating the designs (patterns).
  • the screw 142 which renders the plate 138 rigid with the member 141] is engaged in an eyelet 143 of said plate in such a manner as to permit adjusting the angular mutual position between said plate 138 and said member 140.
  • the spring 144 which is anchored at one end to said member and on the other end is fixed to the lower arm of the forked lever 14 1. Said spring 144 pushes the member 141) downward along the pin 139 and contemporaneously makes the extension 145 of said member adhere against the stop 146 of the forked lever 141.
  • Means described below under detachment and translation of the feelers are adapted to act upon the projection 147 of the forked lever 141 to displace the latter in the direction of the arrow d (FIG. 18) around the pin 139 in such a manner that the member 140 can rotate by the effect of the spring 144 rigidly with the plate 138 and in such a way that the latter can take its own feeler 148 away from contact with the fixed point 1 19 of the frame 1, to effect a translatory movement to contact with the cam 155, or vice versa.
  • Said translations are controlled by the rotation of the button 131 through the small lever 135. 1f the projection 134 of said small lever rests on the projection 133 of the cam 132 the feeler 1 18 is in contact with the cam 159 while in the contrary case said feeler is in contact with the fixed point 149.
  • the cam 154i is applied on the shaft 3 above the interchangeable cam 33c (PEG. 15) and can if desired form one body with said cam 330.
  • Said slide 164 has an arm 165 with a small pin 166 to which is anchored one end of the spring 167 whose other end is anchored to the frame 1.
  • the lever 153 is fulcrumed by the pin 168 to the fork 16 9 provided at the upper end of the lever 17%.
  • Said lever 1715 in turn is fulcrurned on the frame 1 by the pins 171 and 1'72. and carried at its lower end is a dowel 173 (Fl-G. 21) which follows the helical profile 17 5 of the earn 175 and stops said lever in the position prefixed by said cam.
  • the lever 153 is subjected only to the rotation caused by the projection 152; controlled by the hand-operation of the button rm.
  • the feeler 148 contacts the cam 15% and the button 176 is rotated in such a way that the numeral 0 marked thereon is in correspondence with the reference index 177 marked on the frame 1, the lever 153 oscillates alternately with respect to the middle position X, towards the extreme positions Y and W indicated in the diagram of FIG. 23.
  • the lever 153 displaces the slide 164 towards the position w to which corresponds a transport of the fabric in backward feed with maximum stitch length.
  • the oscillation of the slide 154 by action of the cam 1513 can be corrected by rotating the button 176 in one direction or in the other direction in such a way that the cam 175 acting upon the lever 1713 displaces in one direction or in the other direction the pin 168 around which the lever 153 oscillates.
  • the button 176 however can be turned in the direction of the arrow 7 also beyond the position defined by the reference sign (plus); towards the positions defined by the numerals from 1 to 4 marked on said button.
  • said pin 177' does not constitute a hindrance to oscillations of any amplitude that may be desired, of said lever 153.
  • the rotations of the button 176 in such a way as to take the numerals from "0 to 4 marked on said button, to correspond with the reference index 177 marked on the frame 1, are also necessary to control by hand the length of stitch of sewing.
  • Said hand control is effected when the feeler 148 of the plate 131% instead of pressing upon the interchangeable cam 1511, presses upon the fixed point 149 of the frame 1.
  • Said hand control is based upon the following considerations: when the numeral 0 marked on the button 176 is in correspondnece with the reference index 177 of the frame 1, and the feeler 145 is in contact with the fixed point 149, the lever 153 is in the middle position X (FIG. 23) in which, pressing with its end 3154 upon the pin 155 of the lever arm 156, it determines the middle position x of the slide 16 1. Said middle position as said makes the length of the sewing stitch become nil.
  • the stitch-adjusting device also comprises the push-button 178 which may be coaxial with the button 176 and with the cam (FIG. 21),
  • the stem 179 of said push-button 178 is connected to the upper end of a lever 180 by the pin 181.
  • Said lever 180 is freely fulcrumed on the pin 157 and rests with its bottom end 182 on the pin 155 of the lever arm 156 (FIG. 18).
  • the feeler 46 abandons contact with the cams of the pile of cams 51.
  • the body 61 (FIG. 25) carries in addition to the profile 69 also the teeth 185 and 186 respectively cooperating with the upright 31 and with the projection 147.
  • the upright 31 as said is fixed to the lever 29 carrying the two feelers 28 and 32 (FIGS. 4 and 5).
  • the projection 147 as said is adapted to control the detaching of the feeler 148 from the cam 150 and from the fixed point 149 of the frame 1 (FIG. 18).
  • the tooth 185 rotates the upright 31 around the shaft in such a way as to detach the feeler 32 of the lever 29 from contact with the cams of the pile of earns 33 (FIGS. 4 and 5). This may be done because as already men tioned the lever 15 has rotated in the meantime around the axis of the pins 17 and is against the stop 184.
  • the tooth 186 presses upon the projection 147 and rotates the forked lever 141 around the pin 1139, thereby causing the detaching of the feeler 143 of the plate 138 from the fixed point 149 or the cam 150 (FIG. 18).
  • the body 61 carries also a further profile 187 against which presses the projection 188 of a rocker 189 by the effect of the spring 190 anchored to said rocker and to the frame 1. Said rocker 183 is fulcrumed to the frame 1 by the pin 53 (FIG. 24).
  • said profile 187 presents constant radii in contact with the projection 188.
  • said profile carries into contact with the projection 133 a portion such as to disengage the blade 191 of said rocker 139 from the teeth of the toothed means 1&2 and 193 coaxial with the shaft 117 (FIG. 24).
  • Said toothed means 192 and 193 are fixed respectively with the control buttons 131 and 194 which issue in part from the slots 195 and 196 of the frame 1.
  • the button 194 is loose on the shaft 117 and is fixed to the toothed wheel 197 which engages with the toothed wheel 198 fixed in turn on the shaft (FIG. 4). Every rotation of the button 194 then is translated into a rota tion of said shaft 45 and, therefore, into a translatory movement of the feeler 46 along the helix 51) of said shaft.
  • the button 131 is fixed to the shaft 117 and rotates the drum 113.
  • Said rocker 201 is pivoted to the frame 1 by the pin 202 and carries at its other end a second small pin 203 engaged in the fork 294 provided at the lower end of the upright 31. Every rotation of the button 131 therefore is translated through the drum 113 and the rocker 2111, into a translatory movement of the upright 31 and the lever 23 connected therewith along the axis of the shaft 311 and, therefore, into a translatory movement of the feeler 28 along the lever 15 and of the feeler 32 along the pile of earns 33.
  • the helix 199 and the projecting step 114 of the drum 113 in the machine illustrated by way of example are phased in such a way that the shaft 34 rotates intermittently by unidirectional steps when the feeler 32 moves by translatory movement in contact with the cams 33a and 33b, and rotates with continuous movement when the feeler 32 is in contact with the interchangeable earn 330.
  • a cam 132 constituted by a plane surface suitably joined with the projection 133.
  • the feeler 148 finds itself in contact with the interchangeable cam (FIG. 18). If the projection 134 rests on the remaining plane surface of the cam 132, the feeler 14-8 finds itself in contact with the fixed point 149 of the frame 1. In the first case the adjustment of the transport of the fabric will be effected automatically except for possible initial adjustments effected through the button 176, while in the second case said adjustment will be effected by hand, through the same button 176.
  • the button 131 is fitted onto the shaft 117 in such an ular position that the projection 134 of the lever 135 reaches the projection 133 of the cam 132 and therefore positions the feeler 148 in contact with the interchangeable cam 13%) at the same time at which the helix 1% of the drum 113 controls the translatory movements of the feeler 32 in contact with the interchangeable cam 330.
  • the feeler 143 instead finds itself in contact with the fixed point 149.
  • the constancy of the ratio of transmission permits as is well-known to make sewing designs with which the needle is required to penetrate into the cloth in always accurately predetermined positions; it permits for instance to provide the design of sewing as illustrated in FIG. 28 wherein the needle 4 must penetrate a number of times in the same point of the fabric. In that figure with p are indicated the points at which the needle penetrates a number of times.
  • the sewing design illustrated in FIG. 28 is obtained thanks to the combination of cyclic displacements of the needle 4 in the transverse direction a and of reversals of cloth feed by action of the feeder 6, conveniently phased with one another.
  • cams 33c and 150 rotating with continuous movement will have to possess in analogy with the cam 24 toothed profiles and will have to be phased with respect to the upper shaft 2 in such a way as to bring to correspond with their own feelers portions of profile with constant radius at the instants at which the needle 4 is passed into the cloth and portions of protile with radius variable only at the times at which the needle is safely out of said cloth.
  • the other cams of the machine which are destined to rotate with unidirectional movement in steps of adjustable amplitude, may have instead profiles varied in any manner since the needle penetrates into the cloth only in the intervals between one step and the other step, thanks to the convenient phasing of the eccentric 68 on the upper shaft 2, as explained in the rotation of the cams.
  • the profile 60 of the body 61 acts upon the projection 59 of the lever 56 in such a manner that the bar 12 goes beyond the axis of the pins 17 of the lever 15 and at the same time the feeler 46 detaches from the cams 51.
  • the other tooth 186 of said body 61 causes in the meantime the rotation of the rocker 139 in such a manner that the blade 191 of said rocker detaches from the toothed means 192 and 1% fixed respectively to the but- 13 tons 131 and 194 in such a manner that the latter can be rotated.
  • the handle 63 is brought again towards the left, in correspondence with the numerals from to of the graduation reported on the slot 64.
  • buttons 131 and 194 may be attempted. If that positioning is not accurate, the two buttons may rotate until the blade 191 of the rocker 189 engages with the toothings of the toothed means 192 and 193 fixed with the buttons mentioned. In that position of the blade 191, the two buttons cannot be rotated.
  • cams 33 and 51 permit obtaining automatically as many sewing designs (patterns) as are the combinations of said cams two by two, 0
  • every cam of the pile of cams 33 originates as many main patterns of sewing as there are cams of the pile of cams 51 and vice versa.
  • Said searching-and reading means are realized in the following manner (H6. 29): at the lower end of the shaft 117 there is fixed the ring 2% fixed, therefore, with the control button 131. At the periphery of said ring there is mounted by pressure the cylinder 2%.
  • the set screw 297 which fixes the ring 205 to the shaft 117 performs also the function of a key for dragging along the cylinder 266.
  • the cylinder 206 is subdivided into as many vertical sectors as are the positions which the feeler 32 can assume, that is to say, as many as there are cams of the pile of cams 33, and faces the long slot 208 provided in the frame 1.
  • the cylinder 2&6 is subdivided moreover into as many horizontal sectors as are the cams 51 which may be scanned by the feeler 46 following the rotations of the control button 1%. In that way, from the intersection of the vertical sectors and horizontal sectors, the cylinder 206 is divided into as many zones 206 as are the combinations of the positions of the two feelers 32 and i6 and in every zone there is represented diagrammatically the pattern of sewing corresponding to said positions.
  • Saidfeeler 46 is embraced by the fork 209 of a ring 210 slidable on the cylinder 206 and carrying a small frame 211 which frames through the slot 208 the diagrammatical representation of the sewing pattern obtainable for every determined position of the feelers 32 and 46.
  • the cylinder 2% is made of transparent material and is illuminated at bottom by a small lamp 212 applied on a support 213 fixed to the base 7 of the frame 1.
  • the lamp 212 is conveniently screened at the bottom to increase illumination in the interior of the cylinder 206.
  • the cylinder 2% is hollow inside, with a conical cavity 214 having its vertex at the bottom, in the proximity of the lamp.
  • a sewing machine comprising a frame, a first shaft mounted in said frame, means for continuously rotating said first shaft, a needle bar mounted for transverse displacement in said frame, a second shaft rotatably mounted in said frame, a cam stack fixed to said second shaft, means including said cam stack controlling the transverse displacements of said needle bar, a third shaft mounted in said frame, means for driving said third shaft unidirectionally with intermittent steps, means for adjusting the amplitude of the intermittent steps of said third shaft, means for selectively connecting said second shaft with said first shaft and said third shaft, said last named means comprising a first gear rotatably mounted on said second shaft constantly driven by said first shaft, a second gear rotatively mounted on said second shaft constantly driven by said third shaft, a slidable sleeve mounted slidably and non-rotatively on said second shaft between said gears having means for engaging selectively said first and second gears, a pair of spaced collars upon said sleeve, a fork engaged between said collars, feelers contacting
  • a sewing machine having means for feeding the material sewed and means for oscillating a needle bar comprising a rotating first shaft actuating the vertical reciprocating motion of said needle bar, a plurality of cams, means interconnecting said rotating shaft selectively with said cams, means controlled by said cams controlling the transverse oscillations of said needle bar and the regulation of said feeding means, manual means for selecting a cam from said plurality of cams for operating said means controlled by said cams, means for driving said cams comprisinga second shaft upon which said cams are mounted, a third shaft, means for intermittently rotating said third shaft with steps of adjustable amplitude, clutching means to connect said second shaft selectively with said first shaft or said third shaft and means con trolling said clutching means operated by said manual means.
  • said clutching means comprises a pair of spaced gears loosely mounted on said second shaft, a gear fixed to said first shaft in constant engagement with one of said pair of gears, a gear fixed to said third shaft in constant engagement with the other of said pair of gears, a sleeve slidably and nonrotatably mounted on said second shaft located between said pair of spaced gears and said means controlling said clutching means being connected to said sleeve.
  • said plurality of cams comprise a first assembly of cams and a second assembly of cams and said means controlled by said cams controlling the tranverse oscillations of said needle bar and the regulation of said feeding means comprise a pivoted member controlled by said first assembly of earns, a bar connected to said needle bar having a point movable slidably along said member also controlled by said first assembly of cams, said second assembly of cams controlling the regulation of said feeding means, a feeler cooperating with each assembly of cams, means for shifting said feelers along their corresponding cam assemblies and said manual means for selecting a cam comprising a unitary manual control for shifting said feelers along said cam assemblies and adjusting said bar slidably along said member to vary said transverse oscillations.
  • a sewing machine as set forth in claim 10 wherein a hand control is provided for shifting said feelers cooperating with said interchangeable cams and means are provided cooperating with said hand control to release said manual means for selecting a cam only when said single hand control is in a predetermined position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US13587A 1959-12-31 1960-03-08 Zig-zag sewing machine Expired - Lifetime US3081724A (en)

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IT2172959 1959-12-31

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US (1) US3081724A (da)
BE (1) BE598586A (da)
CH (1) CH379241A (da)
DK (2) DK106212C (da)
GB (2) GB911337A (da)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256843A (en) * 1963-04-06 1966-06-21 Hayasaki Akira Decorative sewing device by the automatic zig-zag sewing machine
US3362363A (en) * 1964-02-13 1968-01-09 Necchi Spa Baste sewing process
US3433092A (en) * 1965-10-20 1969-03-18 Janome Sewing Machine Co Ltd Pattern cam selecting arrangement
US3455258A (en) * 1964-11-16 1969-07-15 Janome Sewing Machine Co Ltd Automatic feed changing device in zigzag sewing machine
US3490400A (en) * 1967-11-20 1970-01-20 Singer Co Straight stitch control mechanisms for zigzag sewing machines
US3752164A (en) * 1971-09-02 1973-08-14 Int Playtex Corp Girdle with multi-region abdominal control
US3766871A (en) * 1972-07-07 1973-10-23 Maruzen Sewing Machine Zig zag sewing machine
US3788249A (en) * 1972-10-25 1974-01-29 Singer Co Sewing machine having a plurality of intelligence record systems associated therewith
US3792673A (en) * 1971-02-06 1974-02-19 Necchi Spa Sewing machine having automatic pattern sewing device
US3795210A (en) * 1973-04-26 1974-03-05 Singer Co Cam selection module
US3807329A (en) * 1972-11-29 1974-04-30 Singer Co Integrated sewing machine controls
US3834334A (en) * 1973-06-14 1974-09-10 Singer Co Work feed control mechanism
US3871310A (en) * 1973-01-09 1975-03-18 Janome Sewing Machine Co Ltd Zig-zag sewing machine
JPS5223446A (en) * 1975-08-14 1977-02-22 Janome Sewing Machine Co Ltd Feed controlling device for sewing machine
JPS52150447U (da) * 1976-06-08 1977-11-15
US4280424A (en) * 1978-02-21 1981-07-28 Necchi S.P.A. Household type sewing machine having microprocessor control
DE3239990A1 (de) * 1982-03-08 1983-09-22 Veb Kombinat Textima, Ddr 9010 Karl-Marx-Stadt Musterwaehleinrichtung fuer naehmaschinen
FR2565264A1 (fr) * 1984-05-29 1985-12-06 Singer Co Mecanique de commande de la jetee laterale de l'aiguille pour une machine a coudre

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BE537121A (da) *
US2854935A (en) * 1953-11-19 1958-10-07 Pfaff Ag G M Automatic shifting mechanism for sewing machines adapted for embroidery work
CH339472A (de) * 1955-03-05 1959-06-30 Turissa Naehmaschinenfabrik Ag Nähmaschine mit Zickzack-Einrichtung
US2905119A (en) * 1953-04-11 1959-09-22 Vittorio Necchi Societa Per Az Zigzag control device for sewing machines
US2966869A (en) * 1955-11-10 1961-01-03 Wittenberge Naehmasch Veb Zig-zag sewing machine
US2976830A (en) * 1954-04-05 1961-03-28 Vigorelli Arnaldo Ornamental stitch sewing machine
US2979002A (en) * 1956-02-18 1961-04-11 Mefina Sa Sewing machines

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Publication number Priority date Publication date Assignee Title
BE537121A (da) *
US2905119A (en) * 1953-04-11 1959-09-22 Vittorio Necchi Societa Per Az Zigzag control device for sewing machines
US2854935A (en) * 1953-11-19 1958-10-07 Pfaff Ag G M Automatic shifting mechanism for sewing machines adapted for embroidery work
US2976830A (en) * 1954-04-05 1961-03-28 Vigorelli Arnaldo Ornamental stitch sewing machine
CH339472A (de) * 1955-03-05 1959-06-30 Turissa Naehmaschinenfabrik Ag Nähmaschine mit Zickzack-Einrichtung
US2966869A (en) * 1955-11-10 1961-01-03 Wittenberge Naehmasch Veb Zig-zag sewing machine
US2979002A (en) * 1956-02-18 1961-04-11 Mefina Sa Sewing machines

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256843A (en) * 1963-04-06 1966-06-21 Hayasaki Akira Decorative sewing device by the automatic zig-zag sewing machine
US3362363A (en) * 1964-02-13 1968-01-09 Necchi Spa Baste sewing process
US3455258A (en) * 1964-11-16 1969-07-15 Janome Sewing Machine Co Ltd Automatic feed changing device in zigzag sewing machine
US3433092A (en) * 1965-10-20 1969-03-18 Janome Sewing Machine Co Ltd Pattern cam selecting arrangement
US3490400A (en) * 1967-11-20 1970-01-20 Singer Co Straight stitch control mechanisms for zigzag sewing machines
US3792673A (en) * 1971-02-06 1974-02-19 Necchi Spa Sewing machine having automatic pattern sewing device
US3752164A (en) * 1971-09-02 1973-08-14 Int Playtex Corp Girdle with multi-region abdominal control
US3766871A (en) * 1972-07-07 1973-10-23 Maruzen Sewing Machine Zig zag sewing machine
US3788249A (en) * 1972-10-25 1974-01-29 Singer Co Sewing machine having a plurality of intelligence record systems associated therewith
US3807329A (en) * 1972-11-29 1974-04-30 Singer Co Integrated sewing machine controls
DE2359232A1 (de) * 1972-11-29 1974-06-06 Singer Co Naehmaschine
US3871310A (en) * 1973-01-09 1975-03-18 Janome Sewing Machine Co Ltd Zig-zag sewing machine
US3795210A (en) * 1973-04-26 1974-03-05 Singer Co Cam selection module
US3834334A (en) * 1973-06-14 1974-09-10 Singer Co Work feed control mechanism
JPS5223446A (en) * 1975-08-14 1977-02-22 Janome Sewing Machine Co Ltd Feed controlling device for sewing machine
JPS5650997B2 (da) * 1975-08-14 1981-12-02
JPS52150447U (da) * 1976-06-08 1977-11-15
US4280424A (en) * 1978-02-21 1981-07-28 Necchi S.P.A. Household type sewing machine having microprocessor control
USRE32143E (en) * 1978-02-21 1986-05-13 Necchi S.P.A. Household type sewing machine having microprocessor control
DE3239990A1 (de) * 1982-03-08 1983-09-22 Veb Kombinat Textima, Ddr 9010 Karl-Marx-Stadt Musterwaehleinrichtung fuer naehmaschinen
FR2565264A1 (fr) * 1984-05-29 1985-12-06 Singer Co Mecanique de commande de la jetee laterale de l'aiguille pour une machine a coudre

Also Published As

Publication number Publication date
DK106212C (da) 1967-01-02
GB911337A (en) 1962-11-28
BE598586A (fr) 1961-04-14
DK108131C (da) 1967-09-11
CH379241A (it) 1964-06-30
GB911338A (en) 1962-11-28

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