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US3257980A - Cam selecting mechanism for sewing machines - Google Patents

Cam selecting mechanism for sewing machines Download PDF

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Publication number
US3257980A
US3257980A US588070A US58807056A US3257980A US 3257980 A US3257980 A US 3257980A US 588070 A US588070 A US 588070A US 58807056 A US58807056 A US 58807056A US 3257980 A US3257980 A US 3257980A
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shaft
cams
cam
frame
rotation
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US588070A
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Koike Fuji
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Brother Industries Ltd
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Brother Industries Ltd
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • This invention relates to improvements in zigzag sewing machines and especially to a cam-selecting mechanism forming part of such machines.
  • Zigzag sewing machines wherein the lateral rocking movement of the needle bar is controlled by a cam selected from a group of cams; Machines of this type are also known in which a more complicated stitch pattern is produced by controlling the material feed movement as well as the needle bar lateral movement. It is also'theoretically possible to control direction as well as the rate of the material-feeding movement by a further cam selected from another series of cams. Such an arrangement is impractical, however, because of the complicated mechanisms and operations involved. In addition, undesida-ble combinations could not'be avoided, when separate cam-selecting means are provided for needle-bar-controlling cam groups and for material-feedmovement control cams.
  • a zigzag sewing machine including a needle bar assembly, material feed mechanism and two groups of cams.
  • the material feed mechanism is controllable both as to direction of feed and rate of feed by a cam follower engaging a cam selected from one of these groups.
  • the lateral rocking movement of the needle bar assembly is controllable by a cam follower engaging Y a cam selected from the second group of cams.
  • a single manually and readily operable control assembly is provided which serves to select one of a predetermined number of combinations of a cam from each group.
  • control assembly includes a rotatable dial assembly and a pointer by reference to which the assembly may readily be set to select a desired predetermined stitch pattern.
  • the cam followers may be slidably mounted for movement relative to the groups of cams.
  • the assembly further includes means to retract the cam followers from engagement with the cams, thus enabling the cam followers to be easily moved without interference to a newly selected positionj Moreover, it is preferred that the assembly include a structure preventing the cam followers from being moved without having first been retracted from engagement with the cams. Accordingly, the camselecting means is rendered foolproof against manipulations such as might cause serious damage to the mechanisms.
  • control means for increasing and decreasing the rate of the material-feeding movement, in order to enhance the versatility of the machine.
  • FIG. 1 is a prespective view of the essential parts of a sewing machine mechanism and including one form of the present teachings
  • FIG. 2 is a sectional front view of the assembly
  • FIG. 2A is a fragmentary sectional view of one desirable form of coupling which is included in the mech-
  • FIG. 6 is a transverse sectional view taken along the line 6-6 in the direction of the arrows as indicated in FIG. 4;
  • FIG. 7 is a similar view taken along the line 77 in the direction of the arrows as indicated in FIG. 3;
  • FIG. 8 is a fragmentary and partly sectional side view of those parts of the mechanism which are disposed adjacent the control dial;
  • FIG. 9 is a fragmentary perspective view of certain details of that control mechanism.
  • FIG. 10 is a fragmentary sectional view in enlarged scale of the components of the amplitude control
  • FIG. 11 is a sectional side view of a coupling assembly embodied in the apparatus.
  • FIG. 12 is a fragmentary face view of a portion of material with stitching embraced therein.
  • FIGS. 1 and 2 there has been indicated at 15 a base portion, which is extended to provide a casing part 16.
  • the usual casing 17 extends upwardly from base 15 adjacent one end of the assembly.
  • An arm 18 of the casing extends generally parallel to and overlying the base 15 at the upper end of part 17. This arm terminates in a casing head part 19, from which the needle bar 28 extends downwardly.
  • the casing portion 16 supports the plate 20 which covers its upper face. That plate is provided with the usual openings, through which the feed mechanism extends substantially in line with the path of movement of thebar and the needle carried thereby.
  • the thread take-up lever 21 Adjacent the head portion 19 of the casing assembly, the thread take-up lever 21 is mounted to have its outer end move to a position beyond that casing. This lever is supported intermediate its ends by a pivot 22 extending from a link 23, in turn supported by a shaft 24 fixed to the casing 19.
  • An operating shaft 25 is mounted for rotation within casing portion 18 and supports adjacent the head 19 a crank 26.
  • the thread take-up lever is connected to rock with respect to link 23 as shaft 25 turns.
  • This pin is also connected to needle bar 28 which supports needle 29.
  • the latter is supported for vertical movement within a guide 30.
  • Such guide is, in turn, pivotally supported as at 31 and connected to a bar 32 extending length-wise of easing portion 18. It is apparent that when bar 32 is reciprocated, the guide 30 will be rocked with respect to its point of support 31. Consequently, as bar 28 reciprocates, it may simultaneously be oscillated through a limited are extending ina lateral direction.
  • a presser foot 33 is disposed adjacent the station at which the needle 29 moves. That foot is formed with a laterally extending slot of sutficient length to permit 3 entry and withdrawal of the needle 29 within the limits of its oscillating movement as imparted to it by bar 28.
  • the bar or link 32 is normally maintained in retracted position to the right (as viewed in FIGS. 1 and 2) by means of a spring 34.
  • a nosepiece 35 is secured to the end bar or link 32; attention also being invited to FIG. 10.
  • a link 36 has one end pivotally mounted as at 36' within the casing extension 18. Its body extends adjacent the nosepiece 35 and slidably supports the latter by, for example, a pin and slot coupling 37.
  • a shaft 38 supports a forked member 39 (FIG. disposed at the end of an arm secured to that shaft. The legs of the forked portion 39 receive between them a pin 46. This pin is attached to the end of arm 36.
  • a knob 41 (FIG. 4) is supported for rotation with shaft 38 outside the casing. When this knob is oscillated, it will turn shaft 38 and rock forked member 39. This will raise and lower the free inner end of link 32 and the nosepiece 35 carried thereby.
  • a bell crank lever Pivotally supported (FIG. 10) as at 41' is a bell crank lever, one arm 42 of which extends downwardly and mounts a pivot 42.
  • the lower end of the latter carries the lower end of a track member 43. Nosepiece 35 bears against this track or guide 43.
  • the second arm 44 of the bell crank lever terminate in a forked portion 45.
  • a pin 46 is disposed within the space defined between the arms of the latter. That pin is carried by a hub 47 encircling shaft 38 and rotatable with respect thereto.
  • a pointer or indicating element 48 is attached to that end of member or arm 39 which is secured to shaft 38. This element in cooperation with suitable indicia displayed upon a plate 49 will register the position to which forked member 39 has been shifted by actuation of knob 41.
  • An actuator such as 50 (see FIG. 4) is connected to hub 47. Therefore, with the former being shifted, that hub will rotate within a limited are. So rotating, its pin 46 will shift arm 44 around pivot 41' to correspondingly shift arm 42 and pivot 42 of track member 43. Again any suitable register or indicating structure may be provided so that an operator will be readily aware of the position assumed by the parts incident to a shifting of actuator 54
  • a lever 51 (FIG. 10) is pivotally supported as at 52 by the casing. The end of this lever terminates in a contact 7 portion 53, bearing against the rear face of the rail or guide element 43. The opposite end of this lever bears against a ledge 54 secured to and extending laterally of a shaft 55.
  • lever 51 has a constant arc of oscillation, it will be understood that it will cause a constant rocking of guide or track member 43.
  • that nosepiece and link 32 will be reciprocated to a lesser or greater extent. Minimum movement of the link 32 will occur when the nosepiece is adjacent pivot 42 and maximum movement when it is adjacent the opposite end of member 43.
  • pivot 42' will be shifted either towards pivot 52 or in the direction of link 32. As will be apparent, this provides an adjustment for the range of reciprocation of link 32. That range will be translated by shifting guide 39.
  • control 50 According to whether control 50 is to the left or right of its central position, needle bar 28 will be displaced to the left or right of its intermediate position, thus resulting in the stitch pattern occurring to the left or right of a central line.
  • the function of the control 50 is illustrated in FIG. 12, wherein 150 shows the stitched formed with the control 50 in the intermediate position, while the stitch width control knob 41 is manipulated to first increase and then decrease the amplitude of the stitches.
  • Reference numerals 147 and 148 show the result of setting the control 59 to the right and left, respectively, of its intermediate position.
  • the numeral 56 indicates the feed-controlling shaft.
  • This shaft is suitably supported within casing portion 16 and is rotated conveniently by having a gear 57 attached to its inner end. That gear meshes .with the teeth of a gear 58 attached to a shaft 59, supported for rotation within casing portion 17.
  • a gear 60 is attached to the upper end of shaft 59 and is driven by a gear 61 attached to shaft 25.
  • a shaft 57 which regulates the feed is disposed parallel to shaft 56 and within casing portion 16.
  • the shuttle 62 is operatively connected by gearing (not shown) to be operated by a turning of shaft 56. This shuttle underlies the presser foot and needle station.
  • Disposed above it is the usual feed element 63 serving to engage material disposed upon deck 20 and to shift that material as the needle bar 28 moves through its cycle of operation.
  • Element 63 is supported by an arm 64, fixed to or integral with a shaft 65 having its ends journalled in a bracket 66.
  • Bracket 66 is pivotally supported in the housing at its lower end and a spring 67 bears with one end against this bracket and its opposite end against arm 64 to normally urge the latter and element 63 in a downward direction.
  • the bracket 66 also provides an arm 68 to which there is pivotally connected a lever 69.
  • the outer end of this lever rotatably supports a shaft 70.
  • the opposite end of the lever bears against a horizontal feed cam (not shown) mounted by shaft 56 and acts as a follower in cooperation with the surfaces of that earn.
  • a crank 71 is mounted at one end by shaft 70.
  • a crank 72 At its opposite end, it supports a haft connecting it with the adjacent end of a crank 72.
  • the latter is connected to shaft 57'.
  • a spring one end of which is anchored in a housing portion 73 and the other end of which is adjustably fixed to shaft 57, urges said shaft to rotate in a direction such that the outer end of crank 72 is swung upward.
  • a spring such as 74 may conveniently cooperate with the lever and crank assembly 69, 71 and 72 to urge the follower lever 69 downward onto the horizontal feed cam mounted on shaft 56.
  • a manually rotatable knob 75 serve to elevate or retract the position of feed element 63. This is achieved (see FIGS.
  • crank disc 76 connected to that knob, which through a pin and slot connection 77 rocks the end of a lever 78.
  • This lever which is pivotally supported as at 73 by a wall of the housing, is pivotally connected as at 79 to a bell crank lever 80.
  • the outer end of one arm of the latter carries a roller 81.
  • the opposite end of that bell crank lever terminates in a contact portion 82 bearing against a vertical feed cam 83 mounted by shaft 56. It will be apparent that as the latter rotates, it will cause similar movement on the part of cam 83 to rock bell crank lever 80 around its pivot 79.
  • roller 81 fixed on bell crank lever 80 moves up and down.
  • the roller 81 is slidably engaged with the lower surface of arm 64 and supponts the latter against the action of spring 67, which urges arm 64 and feed dog 63 in a downward direction. Therefore, as roller 81 moves up and down, feed dog 63 is also moved up and down independently of the horizontal reciprocating movement thereof, which will be explained in detail hereinafter.
  • feed dog 63 will be elevated or lowered according to the manner in which knob 75 is shifted to provide for feed or drop function.
  • a motor 84 as in FIG. 7 is disposed to rotate drive shaft 85.
  • the latter supports a gear 86.
  • the teeth of that gear mesh with a gear 87.
  • That gear is mounted upon shaft 25 by means of a uni-directional clutch structure indicated at 88 in FIG. 2A. Attached to the outer end of shaft 25 is fly wheel 89. It follows that as the latter is turned, shaft 25 is turned. Likewise, when gear 87 is rotated in one direction, both that shaft and the fiy wheel will be rotated. However, if shaft 25 is deliberately moved in an opposite direction, then clutch structure 88 will release to prevent a rearward driving of gears 87 and 86 as well as shaft 85 and the mechanism of motor 84.
  • shaft 59 mounts a gear 90.
  • This gear meshes with teeth of gear 91.
  • an assembly of cams involving groups 92 and 93 are rotated incident to the fact that they are mounted upon a shaft 94 to which the gear 91 is secured.
  • a shaft 95 is supported for rotational movement at a point adjacent and preferably below the series of cams 92 and 93.
  • This shaft 95 has mounted upon it a follower arm 96 which, by means of a key-way or otherwise, is secured against rotation with respect to it. That follower 96 is capable of movement axially of shaft 95 and cooperates with one of the series of cams 92 which control the feed action of element 63.
  • shaft 95 has attached to it an actuating arm 96', as shown in FIG. 9.
  • This arm 6 engages a pin 97 secured to a lever 98, guided by means of a pin and slot coupling 99 at a point intermediate its extremities and connected to a crank 100 secured to shaft 57'.
  • a spring is provided to act on shaft 57' and thus urge the outer end of crank 100 upward. The action of this spring urges lever 98 and actuator 96' upward through pin 97, and finally urges follower 96 toward cam 93 through the connection provided by shaft 95 and the key thereof.
  • shaft 55 Extending generally parallel to shaft 95, at a point preferably adjacent and above the axis of the cam group 92-93 (FIG. 4), is the shaft 55 which is mounted for rotation. Slidably keyed on this shaft, in a manner similar to the support of follower 96, is a follower 101. The latter operatively engages the cam and dwell surfaces of the group of cams indicated at 93. It will be remembered that this shaft 55 supports the ledge or actuator 54. It therefore follows that when shaft 55 is oscillated, lever 51 will be rocked. This will control the reciprocation Olf link or bar 32 which, in turn, controls the arcuate movement of the needlesupporting assembly. A lever 102 is pivotally supported as at 103 for movement at its upper end substantially parallel to shaft 55.
  • a similar lever 104 is pivotally supported as at 105 to have its upper end traverse a limited zone of shaft 95.
  • Both of these levers carry, for example, pins 106 which engage within grooves or are otherwise suitably coupled to followers 96 and 101 respectively.
  • followers 96 and 101 As these levers are rocked, those followers will be shifted along the axes of shafts 55 and 95 to selectively overlie one of the groups of cams generally identified at 9293. According to the characteristics of each cam, shafts 55 and 95 may be rocked. So shifted, they will cause desired movements on the part of link 32 and shaft 57 respectively.
  • a spring 107 extends between the lower ends of levers 102 and 104 below their pivot points 103 and 105. This will serve to draw those lower ends towards each other and, therefore, move the upper ends of levers 102 and 104 towards positions in the direction of the outer ends of shafts 55 and 95.
  • a lever (especially shown in FIG. 4) is pivotally supported as at 116.
  • the upper end of this lever terminates in a pair of arms 117 and 118.
  • the first of these arms is engageable with a pin 119 secured to a crank 120 attached to shaft 95.
  • the second arm 118 is engageable with the lower projecting portion of a lever or crank 121 secured to shaft 55. Therefore, if the lower end of lever 115 is moved inwardly (in a counterclockwise direction as viewed in FIG. 4), its arms will cause both shafts 95 and 55 to be rotated, thereby causing the operative ends of followers 96 and 102 to clear the peripheral portions of the individual cams embraced in groups 92 and 93.
  • lever 115 terminates in a contact portion 123. Referring to FIG. 6, this portion is disposed in line with a plate 124. The latter is attached to a shaft 125 mounting on its outer end a knob 126. This knob extends into the recess of a dial member 128. A spring 127 has one end bearing against the base of this recess with its opposite end bearing against the knob 126 to normally maintain the latter in projected position. Shaft 125 is formed with a notch 129 and is encircled by a spring plate 130 secured at one end by a bolt or otherwise to the base element 131 of a dial assembly. The opposite end of spring plate 130 is preferably hook-shaped as at 132. The base of dial 123 presents rearwardly flared side edges 133 which extend adjacent the hook-shaped end portion 132.
  • knob 126 when knob 126 is projected inwardly, it will shift plate 124 to correspondingly move the actuating portion 123 of lever 115. So shifted, the detent structure provided by the spring plate or element 130 in association with notch or groove 129 Will retain the shaft 125 in the position to which it has been shifted. Under these circumstances, knob 126 will be almost completely housed within dial or actuator 128. The latter is slidable on shaft 125 and normally retained in retracted position as a consequence of the spring 127. Therefore, if it is desired to again cause knob 126 to shift to the position shown in FIG. 6, then an operator by simply grasping dial 128 and moving it outwardly will cause the cam surfaces 133 to engage with the end portion 132 of spring 130. This will result in that spring flexing and riding out of notch or groove 129, thereby releasing shaft 125 and knob 126.
  • casing portion 17 is formed with an opening in line with the pattern dial assembly shown in FIG. 6. This opening is formed with its edges embracing a flange 134.
  • a plate 135 overlies the opening and is secured to a hub 131 which is journaled in a hub 136. The latter is formed with a flange 137 mating with flange 134 to prevent an inward movement of the assembly.
  • the collar or hub 131 conveniently supports a separator disc 138. Upon the inner side of this disc, a cam 139 is mounted.
  • a similar control cam 140 is mounted on the opposite disc face.
  • levers 102 and 104 terminate in follower or contact portions riding against the peripheries of cams 140 and 139 respectively.
  • a cam type spring-pressed detent 141 is carried by hub 136 and may engage within one of a number of recesses or openings 142 formed in a plate 143 interposed between cam 140 and hub 136.
  • Plate 135 is conveniently enclosed by a plate 143' extending in sealing engagement with a suitable edge portion of casing 17.
  • the outer face of plate 135 bears thereon data conveniently in the form of representations of stitches 144. Also it bears upon its face a legend 145 such as Manual.
  • the cover 143' which is transparent may conveniently bear upon it a framing portion 146. Within the latter, there may be registered the legend 145 or the representations 144 by rotation of the dial assembly.
  • the plate 135 is fixedly secured to hub 131 to which cams 139 and 140 are also secured. Therefore, plate 135 will always signify by its displayed indicia 144 and 145, the relationship of cams 139 and 140 which serve to traverse levers 102 and 104. Those levers in turn shift the followers 96 and 102 axially of their shafts so that these followers are in registry with predetermined cams of the 92-93 series. Accordingly, the movements of links 32 and shaft 57' will be controlled in a correlated manner such that needle bar 28, in cooperation with feed element 63 will cause relative aggregate movements resulting in the desired stitch pattern.
  • knob 126 when knob 126 is pressed inwardly and shaft 125 is retained in position by the detent structure 129-130, the latter additionally assures that a turning of knob 128 will result in a turning of plate 135, hub 136 and the cams attached thereto.
  • lever 115 With the inward pressing of shaft 125, lever 115 has shifted shafts 55 and 95 so that the followers carried thereby clear the edge portions of cams 92-93. With such clearance, the turning of the dial assembly permits levers 102 and 104 to freely shift the followers without the latter being obstructed by the raised portions of the cams.
  • the followers may be brought to predetermined positions precisely overlying the peripheries of desired cams and only thereupon, with the release of shaft 125, will lever 123 return to its normal position. In that position, it is apparent that shafts 55 and are axially rotated so the followers carried thereby engage the peripheries of the cams.
  • manually shiftable actuator 112 is shown as pivotally supported as at 114.
  • This actuator may also have coupled to it a plate 151.
  • the latter overlies shaft 95 at a point immediately beyond the last of cams 92.
  • the dial is adjusted to have the Manual indication 145 in registry with the framing aperture 146, then the cam 139 will have thrown the end of lever 104 to a position at which the follower 96 underlies the obstruction provided by plate 151. Under those circumstances, the follower arm 96 can be regulated manually by depression of the actuator 112..
  • the follower 101 will be shifted into cooperating engagement with the periphery of a cam of the series 93, which establishes a zigzag pattern on the part of needle 28.
  • this oscillation of the needle bar may be nullified. Accordingly, a straight line of stitching results, since shaft 57 will be maintained in a fixed position determined by the follower 96 engaging the underside of the plate 151 under the influence of the spring surrounding shaft 57.
  • shaft 95 may be moved to cause lever 98 to rock shaft 57' to a position at which a reverse feed takes place. The rate of the reverse feeding movement may be controlled by means of the actuator 108.
  • the desired stitch pattern may be variously disposed within a given zone of the material underlying the presser foot.
  • two or more needles may be employed and if necessary the shuttle assembly might be modified to further amplify the number of permutations and stitch patterns capable of production.
  • the feed may be reversed in action. Accordingly, an operator will be able to produce effects without resorting to numerous different controls which have to be correlated with respect to each other.
  • a sewing machine having a frame, a needle bar mounted in said frame for lateral oscillation and for endwise reciprocation, .
  • a main shaft journaled in said frame for rotation, operative connections between said main shaft and needle bar for imparting endwise reciprocation to said needle bar upon rotation of said shaft, a pitman operatively connected to said needle bar for imparting vibration thereto upon actuation of said pitman, and means for actuating said pitman during operation of the sewing machine comprising a plurality of axially aligned stitch-pattern cams rotatably carried by said frame with the axis thereof extending in the same direction as the axis of the main shaft, drive connections between said main shaft and said cams for rotating said cams upon rotation of said main shaft, a pivot shaft journaled in said frame on an axis parallel to the axis of said cams,
  • cam follower mounted on and slidable along said pivot shaft for operatively engaging said cam follower with a selected one of said cams, said cam follower being keyed to said pivot shaft for unitary turning, means for biasing said cam follower into operative engagement with the periphery of a selected one of said cams, said cams imparting a pattern of oscillation to said cam follower .and said pivot shaft upon rotation of said cams, and operative connections between said pivot shaft and said pitman for actuating said pitman upon oscillation of said pivot shaft.
  • a sewing machine having a frame, a needle bar mounted in said frame for lateral oscillation and endwise reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft Shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a plurality of stitch-pattern cams carried by said cam shaft, a pivot shaft journaled in said frame on an axis parallel to the axis of said main shaft, a cam follower mounted on and slidable along said pivot shaft for operatively engaging said cam follower with a selected one of said cams, said cam follower being keyed to said pivot shaft for unitary turning and operative connections between said pivot shaft and said pitman for actuating said pitman upon actuation of said pivot shaft.
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral movements and endwise reciprocation, a main shaft journaled in said frame for rotation, operative connections between said mainshaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to said needle-bar for imparting lateral movements thereto upon actuation of said pitman, and means for actuating said pitman during operation of the sewing machine comprising .a plurality of axially aligned stitch-pattern cams rotatably carried by said frame with the axis thereof extending in the same direction as the axis of the main shaft, drive connections between said main shaft and said cams for rotating said cams upon rotation of said main shaft, a pivot shaft journaled in said frame on an axis parallel to the axis of said cams, a cam follower mountedby and slidable along said pivot shaft for operatively engaging said cam follower with a selected one of said cams, said cam follow
  • a needle-bar mounted in said frame for lateral movements and endwise reciprocation, a main shaft journaled in said frame for rotation, operative connections between said mainshaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral movements and endwise reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to said needle-bar for imparting lateral movements thereto upon actuation of said pitman, and means for actuating said pitman during operation of said sewing machine comprising a cam shaft journaled for rotation in said frame and arranged parallel to said main shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a plurality of stitch- 1 pattern cams carried by said cam shaft, a'pivot shaft journaled in said frame on an axis parallel to the axis of said main shaft, a cam follower mounted on and slidable along said pivot shaft for operatively engaging said cam follower with a selected one of said cams, said cam fol- 6.
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral oscillation and endwise reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to, said needle-bar for imparting lateral movements thereto upon actuation of said pitman, and means for actuating said pitman during operation of said sewing machine comprising a cam shaft journaled for rotation in said frame and arranged parallel to said' 3 1' main shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a'plurality of stitch-pattern cams carried by said cam shaft, a pivot shaft journaled in said frame on an axis parallel to the axis of said main shaft, a cam follower mounted on and slidable along said pivot shaft for operatively engaging said cam follower with a selected one of said cams, said cam follower being keye
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral movements and for reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to said needle-bar for imparting lateral movements thereto upon actuation of said pitman, a feed mechanism actuated by said main shaft for shifting material under said needle-bar, said feed mechanism having a feed adjusting mechanism for adjusting the feed direction and the scope of said feed mechanism, and means actuating said pitman and said feed adjusting mechanism during operation of the sewing machine comprising a cam shaft journaled for rotation in said frame andarranged parallel to said main shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a plurality of stitch-pattern cams carried by said cam shaft, two pivot shafts journaled in said frame on spaced axes parallel to the axis of said main shaft, two
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral movements and for reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft and said needle-bar for imparting endwise reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to said needle-bar for imparting vibration thereto upon actuation of said pitman, a feed mechanism actuated by said main shaft for shifting material under said needle-bar, said feed mechanism having a feed adjusting mechanism for adjusting the feed direction and the scope of said feed mechanism, and means actuating said pitman and said feed adjusting mechanism during operation of the sewing machine comprising a cam shaft journalled for rotation in said frame and arranged parallel to said main shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a plurality of stitch-pattern cams carried by said cam shaft, two pivot shafts journalcd in said frame on spaced axes parallel to the axis of said main shaft, two cam followers
  • a sewing machine having a frame, a needle-bar mounted in said frame for lateral movements and for reciprocation, a main shaft journaled in said frame for rotation, operative connections between said main shaft and said needle-bar for imparting reciprocation to said needle-bar upon rotation of said shaft, a pitman operatively connected to said needle-bar for imparting vibration thereto upon actuation of said pitman, a feed mechanism actuated by said main shaft for shifting material under said needle-bar, said feed mechanism having a feed adjusting mechanism for adjusting the feed direction and the scope of said feed mechanism, and means actuating said pitman and said feed adjusting mechanism during operation of the sewing machine comprising a cam shaft journaled for rotation in said frame and arranged parallel to said main shaft, drive connections between said main shaft and said cam shaft for rotating said cam shaft upon rotation of said main shaft, a plurality of stitch-pattern cams carried by said cam shaft, two pivot shafts journaled in said frame on spaced axes parallel to the axis of said main shaft, two cam followers mounted

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  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US588070A 1955-10-29 1956-05-29 Cam selecting mechanism for sewing machines Expired - Lifetime US3257980A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1508755 1955-10-29
JP291055X 1955-10-29

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US3257980A true US3257980A (en) 1966-06-28

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US588070A Expired - Lifetime US3257980A (en) 1955-10-29 1956-05-29 Cam selecting mechanism for sewing machines

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US (1) US3257980A (de)
BE (1) BE548219A (de)
CH (1) CH344290A (de)
DE (2) DE1011263B (de)
GB (1) GB795329A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225985A5 (de) * 1973-04-13 1974-11-08 Manufrance
FR2412634A1 (fr) * 1977-12-22 1979-07-20 Mefina Sa Machine a coudre a point zigzag
US4244311A (en) * 1979-02-16 1981-01-13 Janome Sewing Machine Co., Ltd. Zigzag sewing machine with a pattern selecting device
US4297956A (en) * 1978-09-14 1981-11-03 Dorina Nahmaschinen Gmbh Zigzag sewing machine having base-mounted operating elements for controlling sewing
EP0046814B1 (de) * 1980-08-22 1985-08-14 Pfaff Industriemaschinen GmbH Obertransporteinrichtung an einer Nähmaschine
EP0236927A2 (de) * 1986-03-12 1987-09-16 NECCHI Macchine per Cucire S.r.l. Automatische Abhebevorrichtung für die Tasterfinger der Musternokken auf einer Nähmaschine
US20050279435A1 (en) * 2004-06-18 2005-12-22 Coates Jeff D Card holder and billfold

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DE1218267B (de) * 1958-02-13 1966-06-02 Anker Phoenix Naehmaschinen Ag Zickzacknaehmaschine
US3191559A (en) * 1963-04-29 1965-06-29 Singer Co Zigzag mechanism for sewing machines
DE2840209C2 (de) * 1978-09-15 1982-02-18 Dorina Nähmaschinen GmbH, 7500 Karlsruhe Zickzacknähmaschine mit einer Mehrzahl koaxial auf einer Achse angeordneter Steuerkurven
CN110241518B (zh) * 2019-06-20 2024-08-27 安徽杰羽制鞋机械科技有限公司 一种缝纫机

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US2653557A (en) * 1949-12-17 1953-09-29 Mefina Sa Sewing machine
CH300900A (de) * 1953-08-25 1954-08-31 Haas Alexander Zickzack-Nähmaschine.
US2755754A (en) * 1952-05-12 1956-07-24 Turissa Nachmaschinenfabrik A Sewing machine with zigzag arrangement
US2854935A (en) * 1953-11-19 1958-10-07 Pfaff Ag G M Automatic shifting mechanism for sewing machines adapted for embroidery work
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines
US2905119A (en) * 1953-04-11 1959-09-22 Vittorio Necchi Societa Per Az Zigzag control device for sewing machines

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US2653557A (en) * 1949-12-17 1953-09-29 Mefina Sa Sewing machine
US2755754A (en) * 1952-05-12 1956-07-24 Turissa Nachmaschinenfabrik A Sewing machine with zigzag arrangement
US2905119A (en) * 1953-04-11 1959-09-22 Vittorio Necchi Societa Per Az Zigzag control device for sewing machines
CH300900A (de) * 1953-08-25 1954-08-31 Haas Alexander Zickzack-Nähmaschine.
US2854935A (en) * 1953-11-19 1958-10-07 Pfaff Ag G M Automatic shifting mechanism for sewing machines adapted for embroidery work
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225985A5 (de) * 1973-04-13 1974-11-08 Manufrance
FR2412634A1 (fr) * 1977-12-22 1979-07-20 Mefina Sa Machine a coudre a point zigzag
US4297956A (en) * 1978-09-14 1981-11-03 Dorina Nahmaschinen Gmbh Zigzag sewing machine having base-mounted operating elements for controlling sewing
US4244311A (en) * 1979-02-16 1981-01-13 Janome Sewing Machine Co., Ltd. Zigzag sewing machine with a pattern selecting device
EP0046814B1 (de) * 1980-08-22 1985-08-14 Pfaff Industriemaschinen GmbH Obertransporteinrichtung an einer Nähmaschine
EP0236927A2 (de) * 1986-03-12 1987-09-16 NECCHI Macchine per Cucire S.r.l. Automatische Abhebevorrichtung für die Tasterfinger der Musternokken auf einer Nähmaschine
EP0236927A3 (en) * 1986-03-12 1988-02-24 Necchi Societa Per Azioni Automatic device for detaching the cam followers in a sewing machine
US20050279435A1 (en) * 2004-06-18 2005-12-22 Coates Jeff D Card holder and billfold

Also Published As

Publication number Publication date
DE1011263B (de) 1957-06-27
GB795329A (en) 1958-05-21
DE1812934U (de) 1960-06-09
CH344290A (de) 1960-01-31
BE548219A (de)

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