US3034461A - Sewing machine with zigzag or ornamental stitching attachment - Google Patents

Description

y 1962 EQURSCHELER 3,034,461

SEWING MACHINE WITH ZIGZAG OR ORNAMENTAL STITCHING ATTACHMENT Filed Oct. 22, 1956 2 Sheets-Sheet 1 v I71 VQNZ Of 57m? UmcZeZer y 1962 E. URSCHELER 3,034,461

SEWING MACHINE WITH ZIGZAG 0R ORNAMENTAL STITCHING ATTACHMENT Filed 001;. 22, 1956 2 Sheets-Sheet 2 Fig.3

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I71 V572 .Z fl 57774 2 u/asclezei- A I 5y Unit-ed rates Patent Gfhc 3,034,461 Patented May 15, 1962 Sewing Machine Factory Ltd., Dietikon-Zurich, Switzerland Filed Oct. 22, 1956, Ser. No. 617,381 Claims priority, application Switzerland Sept. 1, 1956 4 Claims. (Cl. 112-153) The present invention relates to a sewing machine having a zig-zag or ornamental stitching attachment, wherein the width of the overstitch of the zigzag seam, the position of the pertinent middle line to the left or right of a normal line, and also the distance apart of the stitches, gan be varied by hand or automatically by control memers.

The sewing machine according to the invention is principally characterized in that at least one handle is in synchronism operatively connected on the one hand with an indicating member adapted to play together with a scale of composite sewing designs and on the other hand with the control members so that, with the indicating member set to one of the various sewing designs, the mechanism moving the needle and feeding the work is simultaneously set to one or other of the control members, through which the selected sewing design will be automatically produced as the machine starts to operate.

Further features of the invention will appear from the following description and claims, taken in conjunction with the accompanying drawing, wherein there is shown by way of example one preferred form of embodiment incorporating the invention.

FIG. 1 shows a front view of a sewing machine of the domestic type with free work-supporting arm;

FIFGIG. 2 shows the interior of the machine according to 1; b FIG. 2a is a top view of the sewing-design indicating FIG. 2b is a plan view of the details for adjusting a feed dog;

FIG. 3 is a part top view of the interior of the machine;

FIGS. 4 and 5 are sectional and top views, respectively, of the free Work-supporting arm.

Referring to FIGS. 1 and 2, the sewing machine includes a casing or standard 1% having a longitudinally extending horizontal main shaft 11 journaled therein in the usual way. This shaft carries at one end a handwheel 12 and at the other end a crank 13 for imparting in known manner a reciprocatory movement to the needle bar 15 by means of a guide rod 14. The needle bar 15 is 1ength wise displaceably carried in a guide member 16 oscillatably mounted at 17 on standard It) so that the needle bar 15 can, in addition to its up and down movement, also be oscillated sideways in order to make zigzag seams. At 18 the guide member 16 of the needle bar 15 is linked up to a guide rod 19 being in turn pivoted at 20 to a swing lever 21 arranged on an axle 22 journaled in the standard 18, transversely to the main shaft 11. Arranged at the other end of the swing lever 21 is an axle 23 having two drums Hand 25 mounted thereon. On said drums 24 and 25, feeler pins 26 and 27, respectively, are radially disposed and staggered both in peripheral and axial directions, each of said pins cooperating with its associated control disks 28 and 29, respectively. Circum ferentially the control disks 28, 29 are provided with cams capable of being contacted by the related feelers. The control disks are arrangedon a transverse axle 30 having mounted thereon a wormwheel 30a which meshes with a worm 11a of the main shaft 11, whereby the cams are in positive rotary connection with the latter.

Those control disks 29, which serve for making various standard seams (say, zigzag seams) are stationarily incoroprated on the side of the bracket-arm of the machine facing the operator. The control disks 28 for the ornamental seams are disposed onthe opposite side of the axle 30 and are interchangeable with control disks for other types of ornamental seams. Said control disks 28 may be placed individually or in packets onto the axle 30. The control disks 28 can be changed through an opening 31, FIG. 3, in the rear sidewall of the standard 10 and be held by means of a detent 32. Said opening 31 is closed by a cover '34 which can be turned upwards or downwards round a bolt 33, being locked in its closed position by a screw 35. To each of the control disks 28 and 29 there corresponds a feeler pin 26, 27 of the drums 24, 25. These drums on the swing lever 21 are mounted for rotation with a handle 36 which is accessible from outside and mounted on an axle 39 brought out of the machine standard. The axle 39 carries a helical gearwheel 40 which meshes with a helical gearwheel 41 on a transverse axle 42. The axle 42 carries another wheel 43 which is connected through a chain or belt .drive 44 to a corresponding driving wheel 45 on an axle 46. The axle 46 has another driving wheel 47 also mounted thereon for rotation with a corresponding Wheel 49 on the drum axle 23 through a chain or belt drive 48. Turning of the handwheel 36 will cause the drums 24, 25 with their feeler pins 26, '27 to turn correspondingly through the intermediary of the said members.

The setting handle 36, however, is not only operatively connected with the feeler drums, but synchronously also with an indicating member for setting to the desired sewing design.

In an indicating box 50, on the side-wall of the bracket-arm of the machine facing the operator, various types of the sewing samples to be made with the machine are stylistically illustrated (of. FIGS. 1, 2, 2a and 3). Said box 50 is formed by a cover screwed to the front wall and having a gap 51 (FIG. 3). In said cover, circular apertures 52 are provided, into which transparent disks 53 are inserted. These transparent disks 53 contain, as illustrated in stylistic form, sewing sample designs a-m. Behind said disks an indicator 55 is arranged on an axle 54. The indicator carries at its end a small plate 56 which is coated with fiuoroescent substance (scotchlight) and moves past behind the sewing designs one after the other when the indicator is turned around the axle 54. The axle 54 of the indicator 55 is in operative relationship with the drum axle 23 via a train of gears 57, 58, 59, 60, with gears 57 and 58 meshing with each other and gears 59 and 60 meshing with each other, and is thus in connection with the rotary knob 36. Consequently, when setting the indicator 55 with the fluorescent plate 56 to one of the sewing designs am (FIG. 2) by the rotary knob 36, simultaneously also the corresponding feelers 26 and 27 respectively of the drums 24 and 25 will be set to the associated cams so that the set sewing designs will be automatically produced by the machine when it is started.

The pointer 55 may be such as a disk having a round red marking spot 55 thereon, the diameter being of such size that it can cover the window 52 of the casing 50. In practice the pointer 55 may consist of a disc which is secured on the axle 3t) and having the red indicator mark 56 thereon.

The interconnection from the axle 30 to the hand grip 36 is as follows. The pointer 55 is seated on the axle 30 and a toothed gear Sfla is also securely mounted on the axle and meshes with the gear 57. The latter meshes with the gear 58 and on the same shaft 22 on which the gear 58 is secured there is also a further gear 59 secured thereon. The gear 58 meshes with the gear 59 which latter is connected to rotate the wheel 45 by a chain 48.

. 4 1 (FIG. 3) is mounted on the shaft 42 and which is in mesh with the worm gear lfi and the latter is securely mounted on the shaft 39 with the handwheel 36 secured on the 'end of the shaft 39.

The sewing designs a, b, 'c and k, I are standard seams in the above-mentioned sense. The stationarily built-in cams 29 correspond to these sewing designs. The sewing design d corresponds to an ordinary lockstitch seam. For such seam no control disk is provided, but a fixed stop 61 (FIG. 2) mounted on the bearing support 62 for the axle 30, as by means "of screws.

The :sewing designs e--i are pure decorative stitches, to which the interchangeable cam disks 28 correspond.

The axle 46, as intermediate between the chain- drive axles 42 and 23, is not stationary, 'but carried by a lever 63, oscillating about its pivot axle 64. The axle 64 rests on a bracket '65 firmly secured to the standard or casing. The depending arm of the lever 63 comes within the range *or the free extremity of the axle 39 of the setting handle 36. The axle 39 is spring (66) biased and can. not only be turned but also be displaced en'dwise in the stop bearings 37, 38 with'pin-and-slotguiding 39a, 39b. The axial movement of the setting handle serves, when changing from one sewing design to another, to raise the feele'r pins 26, 27 out of the cams of the associated control disks and, upon suitable rotation of the' drums, to cause other feelers 26, 27 pressing against the cams 'or control disks associated therewith. This is achieved in such a 'way that; 'on pressing-in the setting handle 36,

the end of said bar'39 causes the lever 63 to swing somewhat'clockwise about its axle 64 against the action of the spring '66. Thus also the intermediate axle 46 with the related driving wheel as well as the axle 23 with the drums 24, 25 will be rocked about the swinglever axle 22. By this slight rocking the fecler pins 26, 27

get clear of the control disks. If anew sewing design has to beset, the handle 36 should 'be turned in the pushed-in condition until the indicator 55 is set to the new sewing design. Then the handle 36 is released so that'the bar '39. moves back, the feeler pins of thedrum again engaging the new control disksvia lever 63.

' For carrying out seams in accordance with the designs "g, h, '1', k, l, m, it is necessary to have also the control of the feed dog, besides'that of the needle bar, in View of the corresponding alteration of the distance between the stitches. The mechanism for adjusting the feed dog 'isas follows: W a V g The same axle '22 which carries the drum swing-lever 21 has also mounted thereon a double-armed lever 67a,

67b. The arm 67a includes a feeler pin 68' cooperating withone of the interchangeable control disks 28. The

, lever 67b has pivoted to it a rod 69 which, via a knee' lever 70 swivably mounted on axle '39, is connected to a rocker 71 rigid with the axle 72 for adjusting the 4 arcs, differing solely from each other radially. In all settings of the feeler 88 on the cam section 87a of the control disk 87, the main feeler 68 for the spacing of stitches is disengaged from its corresponding control disk 28, i.e. itno longer tracks the controldisk associated with it. When the feeler 88 engages the cam section 87b, the main feeler 68 can track its associated control disk to adjust the distance between the stitches; Thereby a varying length of stitch is set, the handle 77 not then being actuated. The cam'section 87b Will only cooperate with the feeler 88 when the sewing design f lms to be performed. The cooperation of the feeler 88 with the cam section 87a serves for executing the sewing designs a, b, c, d, e, g, h and i, the operator being able to adjust the stitch length or the spacing of the stitches by means of the handle 77. The camsections 87c, 87d, 87:: of the auxiliary control disk 87 cooperate with the feeler 88 when the seams k, l and m have to be carriedout, say, for sewing buttonholes. The design k shows the lefthand side of the'buttonholing with fixed length of stitch, which is obtained by adjustment of shaft 72 from the feeler 88. Design l'shows the barrings'and design m the righthand buttonholing. All three seams k, land m aresewn through the control by means of the auxiliarycontrol disks 87 and feeler 88 to a definitely set spacing of stitches. The lever 67a, 67b is biased by a spring 89 which tends to urge it along with the feelers 68 and 88 against the related control disks.

The action of the machine shall be made more clearly understood hereinafter by explaining the production of the various sewing design. 7

Suppose the sewing design b has to be performed (definite zig-zag seam). For this, the'operator turns knob 36 until the fluorescent plate 56 of the indicator appears in the indicating box 50 at the sewing design b. By this turning of knob 36 also the corresponding feeler 27 of the drum 25 has lowered onto the corresponding 'stationarily built-in control disk 29. When starting the machine, a seam according to the sewing design b will be made corresponding to this setting. lfa change has to be made to another sewing design, say, to f, the feeler 27 that makes contact with the control disk for the seam b has first to be withdrawn therefrom. This is achieved by pushing-in th handle 36 wherebyas described hereinbeforethe drums 24, 25 with their feeler pins are. raised from the control disks. Thereuponthe handle 36, While'still in the pusheddn position, is turned until the point mark 56 stands behind the sewing design 1. Upon release of the handle, the feeler26 corresponding to the design 1 engages the corresponding interchangeable control disk 28. 'Butsimultan'eously the feeler, 88 of the lever 67a, 67b has fallen, onto the cam portion 87b of the auxiliary control disk 87, whereby the main feeler' 68 can make feed dog. Therooker 71 is slotted and-has at both sides of the slot rungon faces 71a. 7 The knee-lever 70 engages with a pin 70:; the slot in the rocker 71. Via a wormgear 73, 74 on the shaft 72 for adjusting the spacing of stitches, a fluorescent pointer 75 can be turned behind a scale on a transparent disk. Said shaft '7-2 -has also mounted thereon a handle 77 freely accessible to the operator. At its other end, said shaft 72 isin connection *via spurjwheels 78, 79 (FIGS. 2, 4 and 5) with a link guide '80 wherein a block 81 can slide, the'latter being in turn connected to the push fork 83 (FIG. 4) by means of a screw 82. V The feed dog 84 is adjustable in a manner 7 known per se from the link guide 80 through the intermediary of thest'roke shaft 85 and sliding shaft 86.

V 7 Toperform certain'seams, an auxiliary control disk 87 i's'mounted on the intermediate axle 46, cooperating with a teller 88 on arm 67b of the feeler lever 67a, 67b.

,Circumferendally the auxiliary control disk 87 comprises 'var'io'us cam sections 87a, 87b, 87c, 87d, 87e, all circular contact with its cam disk. Thereby the adjustment shaft 72 for the feed 'dog will be positioned correspondingly through the members 69, 70 and 71. Now, when starting the machine, the corresponding sewing design '1 will be performed.

' For sewing buttonholes one proceeds as follows:

On setting the pointer mark 56 first to the design k, a corresponding feeler 27 will'be' urged against its associaated control disk 29. In this position of the parts, the auxiliary feeler 88 is urged by the spring 89 against the V cam section 87c of the auxiliary control disk 87 to thus set the corresponding seam, whereby through the positioning of the feeler 88 onto the cam section'87e the setting shaft 72 adjusts the feed dog to a certain definite amount of stitch length. At the righthand side of'sewing according to design In, the same operation is repeated, except that'then the feeler 88 falls onto the cam section 870, thus setting again to a constant length ofstitch. For sewing the button hole according to design I, the operation is correspondingly repeated, except that then the auxiliary feeler engages the cam section 87d of the auxiliary control disk '87.

What I claim is:

1. A sewing machine with zigzag and other pattern attachments to control and set a needle mechanism and a material advancing mechanism, comprising a casing, a setting member in the form of a knob mounted on the casing, an indicator mounted in the casing, a plurality of gears in the casing to interconnect the knob with the indicator, a scale of composite sewing designs mounted on the casing, a feeler for setting the needle mechanism to obtain a stitch of fixed amplitude connected with the needle mechanism, a feeler for the material advancing mechanism connected thereto, means connecting the knob with the feelers whereby the needle mechanism and the material advancing mechanism are simultaneously set to perform a desired and set sewing design as indicated by the indicator on the scale, control members in the form of rotary disks for producing ornamental seams disposed adjacent each other and provided with peripheral cams, at least one drum having radially staggered pins, each of sm'd disks being selectively operable with one of the radial pins, the staggered feeler pins being selectively caused to track their associated control disks upon the rotation of the drum, the control disks for the ornamental seams adapted to be exchangeably arranged for control disks of other types of ornamental seams, and means connected to the feelers for the needle mechanism and the material advancing mechanism to carry out the desired sewing design as governed by the cams.

2. A sewing machine according to claim 1, wherein a swing lever is connected with the feeler drum and which in turn is operatively connected with the needle mechanism, the feeler drum being operatively connected with the sewing design indicating member and also with the knob accessible to the operator.

3. A sewing machine according to claim 1, in which the drum is mounted on an axle and connected by gears to a shaft projecting out of the casing of the machine at the side facing the operator, and having the indicating member provided with a fluorescent mark movable behind a scale of circularly disposed transparent disks bearing the various sewing designs.

4. A sewing machine according to claim 1, in which transmission members are provided so that the setting member is connected to the feeler drums by the transmission members, the actuation of the setting member causing the feeler drums to be brought into and out of engagement with the control members.

References Cited in the file of this patent UNITED STATES PATENTS 1,611,372 Rader Dec. 21, 1926 1,813,002 Van Hamersveld July 7, 1931 2,030,097 Carter Feb. 11, 1936 2,653,557 Casas-Robert et a1 Sept. 29, 1953 2,755,754 Urscheler July 24, 1956 2,832,302 Gegauf Apr. 29, 1958 FOREIGN PATENTS 430,289 Italy Jan. 15, 1949

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