US2969756A - Sewing machines - Google Patents

Sewing machines Download PDF

Info

Publication number
US2969756A
US2969756A US435275A US43527554A US2969756A US 2969756 A US2969756 A US 2969756A US 435275 A US435275 A US 435275A US 43527554 A US43527554 A US 43527554A US 2969756 A US2969756 A US 2969756A
Authority
US
United States
Prior art keywords
cam
follower
cams
frame
needle
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
US435275A
Other languages
English (en)
Inventor
Eriksson Allan Herman
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.)
Husqvarna Vapenfabriks AB
Original Assignee
Husqvarna Vapenfabriks AB
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 Husqvarna Vapenfabriks AB filed Critical Husqvarna Vapenfabriks AB
Application granted granted Critical
Publication of US2969756A publication Critical patent/US2969756A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • This invention relates to zigzag sewing machines the hollow frame or casing of which comprises an overhanging sewing or needle carrying arm supporting a transversely movable bearing for a needle-bar and housing a longitudinal drive-shaft for imparting longitudinal movement to the needle-bar.
  • Such machines are generally provided with a manually operable device whereby the magnitude of the lateral movements of the needle-bar (the stitch width) can be regulated.
  • a further object is to provide a stitch width control device comprising a plurality of interconnected cams which are readily and selectively connectible with the needle-bar to produce different embroidery patterns.
  • a still further object is to provide a relatively simple and compact cam-operable control device which may be easily built into the machine, preferably in place of the known manually operable control device whereby an ordinary zigzag sewing machine may be readily converted to automatic operation.
  • Figure 1 is a somewhat diagrammatic front view, partly in section, of pertinent parts of a sewing machine according to the invention.
  • Figure 2 shows a section on line 22 in Figure 1, on an enlarged scale.
  • Figure 3 shows a detail section on line 3-3 in Figure 2.
  • Figure 4 is a plan-view of a set of cams interconnected to a unit which is easily detachable from the rest of the machine.
  • Figure 5 is a fragmentary side elevation showing a cam-follower in inoperative position.
  • Figures 6a to 6h illustrate various examples of zigzag seams which the machine can produce.
  • Figure 7 is a side-view of one of the cams.
  • Figure 8 is a fragmentary view, partly in section, and illustrating an alternative form of the driving device for imparting lateral motion to the needle.
  • Figure 9 is a fragmentary view, partly in section, illustrating the general arrangement of Figure 2 supplemented by means effecting automatic displacement of the cams.
  • Figure 9A is an end view of the structure shown in Figure 9.
  • Figure 10 is a detail-view on line 1010 in Figure 9.
  • Figure 11 is an end-view of a modified device for axially displacing the cams.
  • Figure 12 shows a vertical section on line 1212 in Figure 11.
  • Figure 13 is a view partly in 'vertical section, parallel to the axis of the cams, through an embodiment of a device including means for effecting an axial displacement of the cam-follower.
  • Figure 14 is a front view of the handle and dial included in the arrangement of Figure 13.
  • the machine shown in Figure 1 is primarily designed for domestic use. Its hollow frame or casing 1 comprises an upper, overhanging needle-carrying arm 2 and a work support 3 which, if desired, may be a cantilevered arm.
  • the upper arm carries a movable bearing 4 accommodating a substantially vertical needle-bar 5, that is movable longitudinally of the bearing 4 and carries a needle 6.
  • the needle bar is connected with a rotary drive-shaft 7 extending longitudinally of the arm 2 by a crank mechanism comprising components 8, 9, 10 which may be known per se and which impart a longitudinal, reciprocating movement to the needle-bar at each revolution of the drive-shaft.
  • the latter is journalled in journals 11, 12 supported in the frame and may be the main drive-shaft of the machine, also driving a loop-taker in the work support 3 and a reciprocating feed-dog also mounted in the work support and adapted to feed the fabric stepwise in the transverse direction of the arm 2 (substantially perpendicularly to the plane of the sheet in Figure 1).
  • Said parts may be of known construction and are therefore not shown or more closely described.
  • the length and direction of the feed step may in known manner be regulated by means of a handle 13.
  • the needle-bar is also reciprocable laterally.
  • the bearing 4 is swingably mounted at its upper end on a horizontal pivot 14 extending perpendicular to the drive shaft. If desired, however, the bearing could be swingable about a vertical axis.
  • the driving means for imparting lateral motion to the needle comprises a plurality of, in the shown embodiment five, separate earns 15 mounted side by side on a common, preferably horizontal axle or cam shaft 16 ( Figure 2).
  • the axle or shaft 16 extends perpendicular to and is below drive shaft 7 and is connected for rotation therewith by means of worm gears 17, 18.
  • the axle or cam shaft 16 is hollow and rotatably mounted on a cantilevered stub shaft 19 fixedly mounted in the frame.
  • the axle 16 is secured to the shaft 19 by means of a screw 20 mounted in the end of the stub shaft.
  • the cams are preferably non-rotatably mounted on a hub sleeve 21 slid on to but easily detachable from the axle 16
  • the cams together with the sleeve 21 constitute a unit, separately illustrated in Figure 4, and which can easily be removed from axle or shaft 16 through an opening 22 provided in a rear, optionally detachable wall part 23 of the frame at a location opposite shaft 19.
  • the cams are clamped between a collar or flange 24 on the hub sleeve 21 and a nut 25 screwed on to the outer end of the sleeve.
  • the nut 25 can be formed as a knob and provided with a preferably resilient catch 26 for fixing the axial position of the sleeve.
  • the cams should be alternately set-opposite a common cam-follower 27.
  • the screw 20 is provided with five equidistant, peripheral grooves 28 for receiving the latch 26 which is swingable on an axial pin 29 and adapted to engage any of the grooves under the pressure of a spring 30.
  • the axle 16 is provided with an axial driving pin 31 engaging in a driving sleeve 32 rigidly connected with the hub sleeve 21 and, in its turn, preferably engaging eccentric holes 33 in the cams.
  • the knob 25 Wholly or partly extends beyond the wall part 23.
  • the latter may be screwed a dial 34 with indexes corresponding to the various earns, the indexes being situated opposite a certain part of the knob, such as its end surface 35, when the cam in question is opposite the camfollower.
  • the driving device for the lateral motion .of the needle should also comprise a manually variable movement connection between the cam-follower and the bearing 4, preferably a pivotally mounted guide 36 and a guidefollower 37 manually displaceable along the .cams.
  • the guide is swingable together with the cam-follower 27, these parts being provided on opposite sides of an arm 38 which is swingable vertically on a pivot 39.
  • the guide-follower is formed on one end of a rod 40 which is movable in a vertical plane and which, at its opposite end, is articulated to the bearing 4 by means of a pin 41.
  • the guide-follower 37 engages a groove guide 36 in arm 3.8 under the pressure of a spring, preferably a leaf spring 42 bearing against the bearing arm 4.
  • the follower is also guided laterally by the guide groove.
  • the guide-follower is manually disp-laceable along the guide groove by actuating a handle 43 mounted on a shaft 44 that is journalled in the front wall of frame 2 and carries an arm 45, which is connected with the rod 40 by a link 46.
  • the pivot 39 is preferably manually adjustable substantially in the longitudinal direction of the rod 40.
  • this pivot is thus mounted on one arm 47 of a two-armed lever, the other arm 48 of which is forked and actuated by an eccentric pin 49 on a shaft 50 journalled in the frame and provided with a handle 51 mounted in the front wall of the frame 2.
  • the lever has a hub 54 turnably mounted about a pivot pin 52 carried by an arm 53 that is rigidly connected with the stub shaft 19.
  • the ratio of the worm gear 17, 18 should be such that the cams make one revolution during an even number of revolutions of the shaft 7, at least six, say '12, 18,24ora greater number. If the cam-follower follows a regularly toothed cam with half as many teeth, all of the same height, the needle receives a lateral swinging motion in such timed relation to its longitudinal movements that an ordinary zigzag seam is obtained, Figure 6a. Such a cam, 15a, is partially shown in Figure 5. The amplitude of the swinging motion (the width of the seam) decreases with the distance between the guide-follower 37 and the swinging centre of the guide, by actuating handle 43.
  • the knob 25 is released, whereupon the latch 26 will automatically engage within the corresponding groove 28 and fix the cams in the new position.
  • the guide-follower 37 is thereupon lowered by means of the handle 43, whereby the cam-follower is brought in contact with the selected cam, and the machine is started, a zigzag seam is obtained having a pattern corresponding to the profile of the cam. Switching from one pattern-cam to another thus takes place rapidly and conveniently.
  • the selected cam has a shape according to Figure 7, a pattern substantially according to Figure 6g is obtained at each revolution of the cam 15b with the lengthof the pattern depending on the position of the handle 13 and the maximum width thereof depending on the position of the handle 43.
  • FIG. 6b to 6f show examples of other, complicated zigzag seams which may be obtained with other cams, the points 55 indicating the limits between consecutive lock-stitches.
  • a seam according to Figure 6c is indeed a straight zigzag seam as to its general shape, but its width is the composite width of a plurality of, in the example, three stitches.
  • cams for which the purchaser thinks he will have the best use. If the purchaser should change his mind as to one or more of the cams, these may readily be substituted by others, after the aggregate shown in Figure 4 has been removed from the machine.
  • the cam-follower 37 is moved into inoperative position by means of the handle 43, and the latch 26 is moved from engagement in a groove 25, whereupon the aggregate is Withdrawn from the axle 16 and its elongation 20, possibly after removal of the dial 34- through the opening 22.
  • cams can easily be withdrawn from sleeve 21 and a new combination of cams may be slid on to the same, whereupon the knob is again screwed into the end of hub sleeve 21 and the latter is again slid on to the axle 16, while the latch 26 is kept in inoperative position.
  • Each cam may be provided on one or both sides with a slight hub shoulder 56, Figure 7.
  • the cam-follower 27, 38 may also be moved into inoperative position by moving the needle-bar 5 to the left in Figure 1, either manually or by means of some manually operated member, so that the cam-follower is released from the pressure of the springs 42 and is brought into inoperative position by either its own weight and/or a weak spring.
  • a driving aggregate or cam unit in substantial accordance with Figure 4 there may be mounted on the axle 16, opposite the cam-follower 27, a cam or a cam 60 of the same profile adapted to impart to the needle-bar a lateral swinging motion corresponding to a straight zigzag seam (Figure 6a).
  • This cam is preferably mounted on a sleeve 61 between a shoulder 62 thereon and a nut 63 screwed on to the sleeve. The sleeve is slid on the axle 16 into engagement with a flange or shoulder 64 and the driving pin 31 is caused to engage within a corresponding hole in the cam.
  • the screw 20 may be replaced by a simple screw 65, fixing the axial position of the parts 16 and 61.
  • the opening 22 in the wall 23 may be closed by a disk pressed into the same.
  • the latter may be adapted to be auto matically displaced axially relative to the carrrfollower in such manner that at least two of the cams operate the cam-follower alternately, each preferably during one revolution.
  • a simple device for this purpose is shown in Figures 9, 9a and 10.
  • Mounted on the knob 25 is a cam cylinder 70 disposed coaxial of the axle 16 and maintaining the latch 26 in inoperative position. The cam cylinder is caused to rotate together with the cams, for instance by engagement with the driving sleeve 32, and is axially kept in a set position relative to the cams, for instance by friction against the knob.
  • the cam cylinder has an axially acting cam groove arrangement constituted by a groove 71 which crosses itself at a location 72 of the circumference of the cylinder. For-the rest the groove extends in two radial planes ata mutual distance corresponding to the center distance between two adjacent cams.
  • a cam follower 73 formed at one end of a pin 74 which is disposed perpendicular to the axis of the cams and which is rotatably and slidably mounted in a lug 75 on the wall 23.
  • a collar 76 which, in the shown, operative position of the cam follower, is situated in front of a flange 77 on an arm 78 capable of being swung upwardly about a pin 79 and, preferably, like the dial 34 in Figure 2, provided with indexes for the various cams.
  • cam-follower 27 is in contact with the cams 15a and 15b when the cam follower 73 is situated in the right and left hand parts of the groove 71, respectively, and that the mutual angular position of the cams and the cam cylinder 70 is such that the cams are situated opposite the cam-follower with peripheral parts of the same radius, when the cam follower 73 is situated at the crossing-location 72.
  • the cam follower 73 is resting in the right hand part of the groove 71 while the cams rotate, the cam 15a is operative and produces a straight zigzag seam, Figure 6a.
  • the cams may be axially displaceable relative to the cam-follower, possibly against the action of a spring, also by means of a separate knob or handle, operatively connected with a catch disposed in the frame and operative in the axial direction of the cams.
  • the cams may thus be operatively connected with one arm of a vertically or horizontally swingable, possibly angular lever, the other arm of which extends through a slit in the front or upper wall of the frame and serves as a handle.
  • the catch is constituted by a finger 100, secured to one end of a rod 101 which is slidable longitudinally and in the axial direction of the cams.
  • the outer end of rod 101 extends beyond the front wall of the arm 2 and is rigidly connected with a handle 102.
  • the rod may be slidably but non-rotatably mounted in said wall or a part fixedly mounted therein, but according to Figure 12 it is mounted to slide in the shaft 50a of the revolvable handle 51a that controls the starting positions of the zigzag seam.
  • This shaft 50a carries the eccentric pin 49 that engages the arm 48.
  • the handle 102 may here have the shape of a transverse plate arranged in an opening 103 in the handle 51a and capable of being set axially in different positions indicated by indexes 1114 on the handle 51a and corresponding to the operative positions of the different cams.
  • the rod 101 is provided with corresponding incisions 105, which in known manner cooperate with a spring-pressed latch 106 mounted in a bore in the shaft 50a.
  • the finger 100 is preferably swingably mounted on the rod 101 and part of their circumference.
  • the finger is in engagement with the nut 25a in every normal angular position of the handle 51a which, for the purpose of altering the starting position of the zigzag seams, has to be revolvable only through a relatively narrow angle, generally substantially less than half a revolution.
  • the cams can, by means of the handle 102, be conveniently displaced one or more steps against the yielding action of the latch 106.
  • a unit of parts 60 to 63 according to Figure 8 may be mounted on the axle by means of a screw 65, in order to provide a more simple machine wherein ornamental seams can be produced solely by manually regulating the lateral movements of the needle.
  • the setting device 1001tl2 may be omitted.
  • the cams may generally be given the same radius at a When this part is situated opposite the nose 27 of the cam follower, the cams can be displaced relative to the cam-follower also when the latter is in operative position and the machine is running, where by such composite ornamental seams may be produced whereof an example has been shown in Figure 6h.
  • the displacement may take place automatically by essentially the same means as shown in Figures 9 and 10, viz. a camcylinder firmly mounted on the nut 25a and engaging a cam follower revolvably mounted on an arm corresponding to the arm or finger 100.
  • the displacement during work may preferably be performed also manually.
  • a blocking member 110 preferably mounted on the wall part 23, is adapted to cooperate with a substantially circular disk 111 rotatable together with the cams and coaxial thereto and, preferably, mounted between the cams and the nut 25a.
  • the circumference of the disk 111 extends into any of a plurality of notches 112 provided in the blocking member at mutual distances apart equal to those of the cams.
  • the tongues on the blocking member are movable through a recess 113 in the circumference of the disk 111, when the above-mentioned peripheral part 114 of the cams at which the latter have the same radius, is opposite the cam-follower 27.
  • the handle 1tl2 may be urged to the right in good time before the recess 113 has reached the blocking member which, during this stage, is in contact with one side of the disk 111.
  • the desired displacement takes place only after the forward edge 116' of the recess 113 has passed the tongue on the blocking member, whereupon the disk engages another notch in the blocking member.
  • the rear edge 115 of the recess 113 might hit a tongue on the blocking member between a pair of notches 112. Therefore, the blocking member is preferably yieldable in the direction of movement of the disk 111. It may, for instance, be swingably mounted on a pin 117,
  • cams are axially displaceable and provided with a common aXially non-displaceable cam-follower.
  • the cams may, however, also be axially immovable and provided with a common cam-follower, displaceable in the axial direction of the cams.
  • a device for effecting displacement of the cam-follower comprises a rod 82 extending parallel to the pin 39 and slidable but non-rotatably mounted in a sleeve '83 that is mounted in an aperture in the front wall of the frame arm 2.
  • the rod 82 is rigidly connected at one end with a finger 81, the outer end of which engages in a groove 89 extending perpendicularly to the pin 39 and provided along the top side of the cam-follower.
  • the opposite end of rod 82 is connected to a cam cylinder 84 having a helical groove 85 therein.
  • Engaging the latter is a pin 86 secured in a sleeve 87 which is turnable but axially fixed Within the sleeve 83 and provided with an actuating handle 88 disposed on the front side of the arm 2.
  • the cam-follower 33a can be positioned opposite any of the cams.
  • a slight play in the hinge 41 and in the joints of the link i6 permits the guide-follower 37 to partake in the lateral movement of the cam-follower.
  • the hub sleeve 21 carrying the cams may be fixedly mounted on the axle 16, not shown in Figure 13, in substantially the same way as the sleeve 61 in Fig. 8.
  • the handle 38 should also be adjustable relative to an adjacent dial, provided with indexes for the various cams. While these indexes may be constituted as numerals it is better to construct the same as schematic images of the zigzag seams corresponding to the shape of the various cams. Like the cams, the indexes are preferably easily exchangeable.
  • the dial is constituted by an annular disk 90 disposed between the handle 88 and the front side of the frame arm 2 and, preferably, rigidly connected with the sleeve 83.
  • Index-carrying plates 91 are detachably connected with the disk, for instance by providing the latter with undercut recesses 92 in which the plates are radially inserted and retained by friction.
  • the indexes are disposed along the dial in such a way, that each cam is opposite the cam-follower when the handle is set opposite the index of the cam in question.
  • the machine may be provided with a cam-controlled stitch-length regulating device also an automatic regulation of the stitch length.
  • a cam-controlled stitch-length regulating device also an automatic regulation of the stitch length.
  • the regulating device here in question preferably comprises a set of rotary pattern-cams mounted side by side on a common axle and displaceable axially relative to a common cam-follower and thereby selectively connectible with the feeder for a continuous, automatic control of the feed movement.
  • These feed-control cams may be arranged in sub stantially the same manner as are the cams 15.
  • the latter and the feed cams are preferably mounted in the hollow frame on two separate, parallel stub axles and driven with the same speed of rotation.
  • An ornamental stitch sewing machine comprising a hollow frame including an overhanging sewing arm, a needle carried by said frame and mounted for endwise reciprocation and for lateral swinging movement relative to said arm, means for reciprocating said needle including a drive shaft extending longitudinally of said arm,
  • cam mechanism including a cam shaft extending perpendicular to the axis of said drive shaft and having a free end, said arm having an opening therein opposite the free end of said cam shaft, a unit comprising a series of interconnected pattern cams, means for removably mounting said unit on said cam shaft for rotation therewith, said last-mentioned means including means permitting sliding engagement of the unit axially of said cam shaft so that said unit can be readily removed from said cam shaft and withdrawn through said opening, spring operated latch means for releasably retaining said cam unit on said cam shaft and means for turning said cam shaft in response to rotation of said drive shaft, cam follower means having a single cam-engaging head for engaging and responding to the surface of a cam of said series, pivot means mounting said follower means for swinging movement about an axis parallel to said cam shaft, means mounting said follower means and said unit for relative shifting movement within the frame so that said head can be positioned for cooperation with any one of said series of cams, means normally urging said follow
  • the means mounting said unit on said cam shaft including a hub sleeve removably mounted on said cam shaft, said cams being separately and detachably mounted on said sleeve.
  • An ornamental stitch sewing machine comprising a hollow frame including an overhanging sewing arm, a needle carried by said frame and mounted for endwise reciprocation and for lateral swinging movement relative to said arm, means for reciprocating said needle including a drive shaft extending longitudinally of said arm, means for rotating said drive shaft, a cam shaft extending perpendicular to the axis of said drive shaft, a unit comprising a series of interconnected pattern cams, means mounting said unit on said cam shaft for rotation therewith, means for turning said cam shaft in response to rotation of said drive shaft, cam follower means having a single cam-engaging head for engaging and responding to the surface of a cam of said series, pivot means mounting said follower means for swinging movement about an axis parallel to said cam shaft, means mounting said follower means and said unit for relative shifting movement within the frame so that said head can be positioned for cooperation with any one of said series of cams, means normally urging said follower and thus said head into engagement with a selected cam, means for disengaging said head from a selected cam, manually
  • An ornamental stitch sewing machine comprising a hollow frame including an overhanging sewing arm, a needle carried by said frame and mounted for endwise reciprocation and for lateral swinging movement relative to said arm, means for reciprocating said needle includ ing a drive shaft extending longitudinally of said arm, means for rotating said drive shaft, a cam shaft extending perpendicular to the axis of said drive shaft, a unit comprising a series of interconnected pattern cams, means mounting said unit on said cam shaft for rotation therewith, said last-mentioned means including means permitting sliding of the unit axially of said cam shaft, means for turning said cam shaft in response to rotation of said drive shaft, cam follower means having a single camengaging head for engaging and responding to the surface of a cam of said series, pivot means mounting said follower for swinging movement about an axis parallel to said cam shaft, means normally urging said follower means and thus said head into engagement with a selected cam, means mounting said unit and follower means for relative movement for disengaging said head from a selected cam, manually oper
  • An ornamental stitch sewing machine comprising a hollow frame including an overhanging sewing arm, a needle carried by said frame and mounted for endwise reciprocation and for lateral swinging movement relative to said arm, means for reciprocating said needle including a drive shaft extending longitudinally of said arm, means for rotating said drive shaft, a cam shaft extending perpendicular to the axis of said drive shaft, a unit cont prising a series of interconnected pattern cams, means mounting said unit on said cam shaft for rotation therewith, said last-mentioned means including means permitting sliding of the unit axially of said cam shaft, means for turning said cam shaft in response to rotation of said drive shaft, cam follower means having a single camengaging head for engaging and responding to the surface of a cam of said series, pivot means mounting said follower for swinging movement about an axis parallel to said cam shaft, means normally urging said follower means and thus said head into engagement with a selected cam, means mounting said unit and follower means for relative movement for disengaging said head from a selected cam, manually operable means
  • a needle means carried by said frame and mounted for longitudinal reciprocation and for lateral swinging movement, a drive shaft mounted within said frame for reciprocating said needle, a cam shaft mounted within said frame, means connected between said drive shaft and cam shaft for turning said cam shaft a fraction of a revolution for each complete needle reciprocation, a plurality of cams mounted as a unit on said cam shaft for simultaneous rotation therewith, a follower having a single cam-engaging head, means mounting said follower so that the head can respond to the surface of a selected cam, said head and unit being relatively shiftable lengthwise of said cam shaft for cam selection purposes, a first manually operable means within the frame and manipulatable exteriorly of the frame for relatively positioning said head and unit for cam selection purposes by moving one of said unit and head relative to the other, said manually operable means including a movable member shiftable in a direction parallel to said cam shaft establishing a tongue and groove connection between said movable member and the shiftable one of said unit and follower, said tongue
  • a needle means carried by said frame and mounted for longitudinal reciprocation and for lateral swinging movement, a drive shaft mounted within said frame for reciprocating said needle, a cam shaft mounted within said frame, means connected between said drive shaft and cam shaft for turningsaid cam shaft a fraction of a revolution for each complete needle reciprocation, a plurality of cams mounted as a unit on said cam shaft for simultaneous rotation therewith, a follower having a single cam-engaging head, means mounting said follower so that the head can respond to the surface of a selected cam, said head and unit being relatively shiftable lengthwise of said cam shaft for cam selection purposes, a first manually operable means within the frame and manipulatable exteriorly of the frame for relatively positioning said head and unit for cam selection purposes by moving one of said unit and head relative to the other, said manually operable means including a movable member shiftable axially in a direction parallel to said cam shaft, means establishing a tongue and groove connection between said movable member and the shiftable one of said unit
  • a needle means carried by said frame and mounted for longitudinal reciprocation and for lateral swinging movement, a drive shaft mounted within said frame for reciprocating said needle, a cam shaft mounted within said frame, means connected between said drive shaft and cam shaft for turning said cam shaft a fraction of a revolution for each complete needle reciprocation, a plurality of cams mounted as a unit on said cam shaft for simultaneous rotation therewith, a follower having a single cam-engaging head, means mounting said follower so that the head can respond to the surface of a selected cam, said head and unit being relatively shiftable lengthwise of said cam shaft for cam selection purposes, a first manually operable means within the frame and manipulatable exteriorly of the frame for relatively positioning said head and unit for cam selection purposes by moving one of said unit and head relative to the other, said manually .opera em aa i c uding a m bl em shiftable in a direction parallel to said cam shaft, means establishing a tongue and groove connection between
  • a needle means carried by said frame and mounted for longitudinal reciprocation and for lateral swinging movement, a drive shaft mounted within said frame for reciprocating said needle, a cam shaft mounted within said frame, means connected between said drive shaft and cam shaft for turning said cam shaft a fraction of a revolution for each complete needle reciprocation, a plurality of cams mounted as a unit on said cam shaft for simultaneous rotation therewith, a follower having a single cam-engaging head, means mounting said following so that the head can respond to the surface of a selected cam, said head and unit being relatively shiftable lengthwise of said cam shaft for cam selection purposes, a first manually operable means within the frame and manipulatable exteriorly of the frame for relatively positioning said head and unit for cam selection purposes by moving one of said unit and head relative to the other, said manually operable means including a movable member shiftable parallel to said cam shaft, means establishing a tongue and groove connection between said moveable member and the shiftable one of said unit and follower, s aid tongue and groove
  • An ornamental stitch sewing machine including a hollow frame, a needle carried by said frame and mounted for endwise reciprocation and for lateral swinging movements, a drive shaft mounted within the frame for reciprocating said needle, means for rotating said drive shaft, cam mechanism including a cam shaft Within the frame, means connected between said drive shaft and said cam shaft for turning the latter, at least one cam providing a cam unit carried by said cam shaft, a follower means for cooperation with said cam unit, means operably connected between said needle and said follower for transmitting cam controlled movement of the follower to the needle to laterally swing the needle, a stub shaft fixed by said frame and having an outer free end, said frame having an opening opposite the end of said stub shaft, a pattern cam support means rotatably mounted on said stub shaft, and having a driving connection with said drive shaft, said support means having a free end facing said opening, a driver element carried by said support means and extending toward said opening, said cam being adapted for sliding engagement with said support and having an aperture for receiving said driver element whereby rotation of the
  • cam shaft comprises a hollow shaft rotatably mounted on said stub shaft, a drive gear on said hollow shaft adjacent one end, said cam unit being slidably received on the opposite end of said hollow shaft, cam unit retaining means on said stub shaft, said axially extending means being of less diameter than said cam and releasable cam unit retaining means carried by said axially extending means for cooperating with said first mentioned cam unit retaining means.
  • a zig-zag stitch sewing machine of the type including a hollow sewing arm carrying a needle bar mounted for longitudinal reciprocation and lateral swinging movement
  • the improvement comprising drive means within the arm for reciprocating the needle bar, motion imparting means also within the arm and driven by said drive means for imparting lateral swinging movement to said needle bar and including rotatable pattern cam means driven by said drive means, follower means engageable with and disengageable from said cam means and connecting means operably connected between said follower means and said needle bar for converting rotary movement of said cam means into lateral swinging movement of said needle bar in accordance with the throw imparted to said follower by said cam means, said connecting means further including means for varying the lateral swinging movement of said needle bar, said follower having a single cam engaging head, a flanged member rotatably mounted on said arm and driven by said drive means, a pin extending axially from the flange of said flanged member, said cam means comprising a flanged sleeve slid
  • a zig-zag stitch sewing machine of the type including a hollow sewing arm carrying a needle bar mounted for longitudinal reciprocation and lateral swinging movement, the improvement comprising a plurality of rotary stitch regulating pattern cams mounted side by side in said arm, a hub shoulder on one side of each cam, a spring urged cam follower engaging one of said cams and connected to said needle bar, means for moving said follower out of engagement with said cam, a hub sleeve, said cams being separate and detachably mounted on said hub sleeve, a stub shaft carried by said arm and terminating in a free end, said sleeve being mounted on said shaft, said arm having an opening therein opposite the free end of said shaft, a flange on one end of said sleeve and a nut received on the opposite end of said sleeve for clamping said cams thereon, said nut being of less diameter than said cams, axially extending means on said sleeve, means on each cam receiving

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US435275A 1953-09-01 1954-06-08 Sewing machines Expired - Lifetime US2969756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE335009X 1953-09-01

Publications (1)

Publication Number Publication Date
US2969756A true US2969756A (en) 1961-01-31

Family

ID=20308203

Family Applications (1)

Application Number Title Priority Date Filing Date
US435275A Expired - Lifetime US2969756A (en) 1953-09-01 1954-06-08 Sewing machines

Country Status (6)

Country Link
US (1) US2969756A (sv)
BE (1) BE531323A (sv)
CH (1) CH335009A (sv)
FR (1) FR1112101A (sv)
GB (1) GB756403A (sv)
NL (2) NL107334C (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999471A (en) * 1956-10-09 1961-09-12 Pfaff Ag G M Adjustable guiding cam mechanism
US3062164A (en) * 1958-09-08 1962-11-06 Riccar Sewing Machine Co Ltd Device for automatic zigzag sewing
US3070050A (en) * 1957-06-26 1962-12-25 Gritzner Kayser A G Sewing machine with indicator means for stitch patterns
US3091200A (en) * 1960-09-14 1963-05-28 Sanshin Jiguzagu Mishin Seizo Pattern cam arrangement for sewing machines
US3108556A (en) * 1960-09-07 1963-10-29 Mefina Sa Zig-zag sewing machines
US3435788A (en) * 1965-11-08 1969-04-01 Mefina Sa Sewing machine
DE2738189A1 (de) * 1976-08-30 1978-03-02 Rca Corp Stoerunterdrueckungsschaltung
US6058862A (en) * 1997-11-27 2000-05-09 Brother Kogyo Kabushiki Kaisha Link-member swinging apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1710894B1 (de) * 1955-09-14 1970-05-21 Husqvarna Vapenfabrieks Aktieb Zickzacknaehmaschine
DE1031618B (de) * 1956-10-09 1958-06-04 Pfaff Ag G M Stichstelleinrichtung fuer Naehmaschinen
US3296988A (en) * 1958-11-17 1967-01-10 Fukuske Kabushiki Kaisha Zigzag sewing machine
US3013512A (en) * 1959-03-18 1961-12-19 Cons Sewing Machine Corp Automatic zig-zag sewing machine
US3034462A (en) * 1959-11-04 1962-05-15 Koyo Seiko Company Ltd Ornamental stitch sewing machine
US3057311A (en) * 1960-01-25 1962-10-09 Singer Mfg Co Cam mounting means for zigzag sewing machines
US3068817A (en) * 1960-04-26 1962-12-18 White Sewing Machine Corp Zig-zag sewing machine

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE525454A (sv) * 1953-01-28
DE182484C (sv) *
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.
US1551453A (en) * 1925-08-25 Moeris
US1604710A (en) * 1924-10-21 1926-10-26 Lewis Invisible Stitch Machine Needle mechanism for blindstitch sewing machines
US1793279A (en) * 1927-12-17 1931-02-17 Fischer Charles Harry Automatic forming machine
US2005070A (en) * 1933-05-04 1935-06-18 Textile Machine Works Lace attachment for full fashioned knitting machines
US2403868A (en) * 1942-08-13 1946-07-09 Nicholas P Lloyd Camshaft assembly
US2590907A (en) * 1947-05-23 1952-04-01 William R Donaldson Sewing machine
US2623487A (en) * 1950-03-14 1952-12-30 Marasco Anthony Selectively automatic, stitchvarying device
US2653557A (en) * 1949-12-17 1953-09-29 Mefina Sa Sewing machine
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
US2693778A (en) * 1952-06-06 1954-11-09 Harris Carl Embroidering mechanism for zigzag sewing machines
US2832302A (en) * 1952-05-31 1958-04-29 Singer Mfg Co Sewing machine

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE182484C (sv) *
US1551453A (en) * 1925-08-25 Moeris
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.
US1604710A (en) * 1924-10-21 1926-10-26 Lewis Invisible Stitch Machine Needle mechanism for blindstitch sewing machines
US1793279A (en) * 1927-12-17 1931-02-17 Fischer Charles Harry Automatic forming machine
US2005070A (en) * 1933-05-04 1935-06-18 Textile Machine Works Lace attachment for full fashioned knitting machines
US2403868A (en) * 1942-08-13 1946-07-09 Nicholas P Lloyd Camshaft assembly
US2590907A (en) * 1947-05-23 1952-04-01 William R Donaldson Sewing machine
US2682845A (en) * 1948-12-20 1954-07-06 Mefina Sa Zigzag sewing machine
US2653557A (en) * 1949-12-17 1953-09-29 Mefina Sa Sewing machine
US2623487A (en) * 1950-03-14 1952-12-30 Marasco Anthony Selectively automatic, stitchvarying device
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
BE525454A (sv) * 1953-01-28

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999471A (en) * 1956-10-09 1961-09-12 Pfaff Ag G M Adjustable guiding cam mechanism
US3070050A (en) * 1957-06-26 1962-12-25 Gritzner Kayser A G Sewing machine with indicator means for stitch patterns
US3062164A (en) * 1958-09-08 1962-11-06 Riccar Sewing Machine Co Ltd Device for automatic zigzag sewing
US3108556A (en) * 1960-09-07 1963-10-29 Mefina Sa Zig-zag sewing machines
US3091200A (en) * 1960-09-14 1963-05-28 Sanshin Jiguzagu Mishin Seizo Pattern cam arrangement for sewing machines
US3435788A (en) * 1965-11-08 1969-04-01 Mefina Sa Sewing machine
DE2738189A1 (de) * 1976-08-30 1978-03-02 Rca Corp Stoerunterdrueckungsschaltung
US6058862A (en) * 1997-11-27 2000-05-09 Brother Kogyo Kabushiki Kaisha Link-member swinging apparatus

Also Published As

Publication number Publication date
NL107334C (sv)
FR1112101A (fr) 1956-03-08
NL189735B (nl)
GB756403A (en) 1956-09-05
CH335009A (de) 1958-12-31
BE531323A (sv)

Similar Documents

Publication Publication Date Title
US2969756A (en) Sewing machines
US2684649A (en) Device for embroidering automatically with zigzag sewing machines
US2832302A (en) Sewing machine
GB736277A (en) Improvements in or relating to sewing machines
US2972319A (en) Apparatus for obtaining in a zig-zag sewing machine an automatic displacement of thefabric apt to be amplitude adjusted
US2731929A (en) Sewing machine
US2297197A (en) Zigzag sewing machine
US2966868A (en) Zigzag sewing machine
US3117542A (en) Arrangement in zig-zag sewing machines for sewing button holdes automatically
US3257980A (en) Cam selecting mechanism for sewing machines
US3177835A (en) Automatic pattern zigzag sewing machine
US3026832A (en) Zigzag embroidering machines
US4546717A (en) Sewing machine differential feed
US2986107A (en) Zigzag sewing machines
US3433190A (en) Skip-stitch mechanism for household zigzag sewing machines
US3055324A (en) Zigzag sewing machine with automatic motif-frequency control
US3635179A (en) Zigzag sewing machine for producing closed sewing patterns, particularly buttonholes
US3055325A (en) Sewing machine
US3130697A (en) Control system for zig-zag sewing machines
US3013512A (en) Automatic zig-zag sewing machine
US3075483A (en) Zig-zag sewing machines
US3127856A (en) Hole stitching device for zigzag sewing machine
US3313257A (en) Stitch control arrangement for a zig-zag sewing machine
US3131658A (en) Device for uniform regulation of forward and reverse stitches in automatic button hole stitching by means of a zigzag sewing machine
US3216386A (en) Sewing machine with upper needle point and lower wheel feed