US3353509A - Zig-zag sewing machine with single manually operable setting device for both overstitch width and stitch length - Google Patents

Zig-zag sewing machine with single manually operable setting device for both overstitch width and stitch length Download PDF

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US3353509A
US3353509A US439771A US43977165A US3353509A US 3353509 A US3353509 A US 3353509A US 439771 A US439771 A US 439771A US 43977165 A US43977165 A US 43977165A US 3353509 A US3353509 A US 3353509A
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setting
cam
stitch
adjusting
stitch length
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Reeber Rudolf
Wenz Herbert
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GM Pfaff AG
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GM Pfaff AG
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
    • D05B69/24—Applications of devices for indicating or ascertaining sewing-tool position
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • a scanning means or element is operatively engageable with both setting cams, and a single manually operable setting device is operative to effect displacement of the scanning means and both of said setting cams to effect conjoint adjustment of the over stitch width and the stitch length.
  • the single manually operable setting device is associated with a pictorial indication of the stitch length and stitch width, as well as with an indicator, With the pictorial representation and the indicator being relatively movable in accordance with movement of the setting device.
  • the indicating mark indicates, on the pictorial representation, the actual stitch length and width being set.
  • This invention relates to zigzag sewing machines having adjustments for overstitch width and stitch length and, more particularly, to a novel zigzag sewing machine including a singe control for conjointly adjusting the overstitch width and the stitch length, and including means for indicating the particular stitch form set.
  • Zigzag sewing machines where so-called automatic devices are additionally included in the machine.
  • the individual phases of a certain sewing program or operation such as the setting necessary for the production of a complete button hole, are set successively step-by-step with the aid of a single actuating means.
  • This actuating means must be provided in addition to the normal setting knobs individual to the setting of the stitch width and to the setting of the stitch length. Therefore, the usual stitch forms necessary for zigzag or for straight stitch seams cannot beset by such single actuating 3,353,509 Patented Nov. 21,1967
  • seams can be eifected only after individual manual setting of the desired stitch form with the particular and individual setting means for the stitch width and for the stitch length and which are provided for this purpose.
  • An object of the invention is to provide a zigzag sewing machine in which the operation is simplified and facilitated and in which sources of errors due to errors in setting are eliminated.
  • Another object of the invention is to provide an improved zigzag sewing machine including a single control for conjointly setting both the overstitch widths and the stitch lengths.
  • a further object of the invention is to provide a zigzag sewing machine including a single control for conjointly setting the overstitch width, the stitch length, and indicating the particular stitch form set.
  • Yet another object of the invention is to provide, in a zigzag sewing machine, a single manually operated setting means for setting the total entire program of stitch executions thereof, and particularly the stitch width and stitch length components.
  • Still another object of the invention is to provide a zigzag sewing machine including devices for adjusting the overstitch width and the stitch length, these devices being connected, through a respective setting cam and respective scanning means, with a single manually controllable setting means, preferably designed as a knob and by actuation of which the overstitch width and the stitch length may be conjointly adjusted.
  • a further object of the invention is to provide a zigzag sewing machine including means for visually indicating the physical form of the particular stitch form set.
  • Still another object of the invention is to provide a zigzag sewing machine including means for conjointly thereby, an indicating mark cooperable with a visualindication of the particular stitch form as set by the adjustment means.
  • a zigzag sewing machine in accordance with the invention includes devices for adjusting the overstitch width and the stitch length. These devices are connected, through respective setting cams and respective scanning means, with a single manually operable or controllable setting device which preferably is designed as a knob. By operation of this device, the overstitch width and the stitch length can be varied or adjusted conjointly.
  • the zigzag sewing machine includes a pattern or picture serving to indicate the particular stitch form set, and this pattern is composed of a succession of identical replicas or imitations of the stitch forms characteristic of respective settings of the manual adjustment means.
  • the setting of a stitch form to the replica or pic ture thereof in the indicating pattern can be eifected by an indicating mark controlled by the manual setting or adjusting means and cooperable with the indicating pattern.
  • the seamstress needs to set only one manually actuated means to conjointly adjust the overstitch width and the stitch length to the visual replica of the desired individual stitch, as visible from the indicating pattern.
  • the stitches then to be formed will correspond exactly with the stitch form set on the indicating means.
  • the indicating mark, the indicating pattern and the setting device may be designed and mutually correlated in various manners.
  • a particular advantageous correlation can be effected by applying the indicating pattern in fixed relation on the machine housing and making the indicating mark displaceable in relation to the fixed pattern and connected directly with the setting device.
  • the setting device is designed as an adjustable knob, the indicating pattern can be provided directly on this knob.
  • the indicating mark cooperable with the indicating pattern is arranged in fixed relation on the housing of the sewing machine.
  • stitch form indicating means can, in accordance with the invention, be controlled by the manual setting means through transmission elements.
  • a feature of the invention consists in that the setting cams, provided between the setting devices for the overstitch width and the stitch length and the mentioned scanning means, :are subdivided into sections.
  • the scanning profiles of the corresponding sections for the stitch length and for the overstitch width are so designed that the profile height is constant on the entire subsection of one cam while the profile height on the corresponding subsection of the other cam is varied steadily from a minimum to a maximum or vice versa.
  • one stitch component is maintained at a constant value through one subsection while the value of the other stitch component is steadily varied.
  • FIG. 1 is a perspective view of a zigzag sewing machine embodying the invention
  • FIG. 2 is a transverse vertical sectional view through the standard of the sewing machine shown in FIG. 1, looking in the direction of the hand wheel;
  • FIG. 3 is an exploded perspective view of the devices for setting the stitch length and the overstitch width
  • FIG. 4 is a partial perspective view, partially in section, of the adjusting device for the overstitch width and the drive thereof;
  • FIG. 5 is an enlarged representation ofthe stitch indicating pattern consisting of a succession of identical imitations or replicas of the stitch forms.
  • a zigzag sewing machine embodying the invention comprises a work-support plate 1, a standard 2, an arm 3 and a head 4.
  • the head 40f the machine encloses the guide 5 for the needle shank, and this guide is pivotally suspended about a hinge pin 6. Swinging or pivoting of guide 5 about hinge pin 6 is effected from rocker shaft 7, whose movement is transmitted by a crank 8through a link 9, provided with ball joints at its ends, to an angle lever 10 mounted in arm 3 and connected by a pitman 11 to needle shank guideS.
  • the arm drive shaft 12 enclosed within 'arm 3 has a stitch-setting eccentric 13 secured to rotate therewith.
  • Eccentric 13 .is .operatively-engaged with the forked upper end of an eccentric lever 14.
  • the lower end of lever 14 is pivotally connected to a crank 15 which is secured on cloth feed.
  • shaft 17 mounted in bearings 16. Shaft' 17 imparts horizontal movements to cloth feed 18, shown in FIG. 1, in a known manner.
  • shaft 14 has pivotally secured thereto, by means of a hinge screw 19, a slider 20 which is slidable in the stitch-setting block or guide 21.
  • block 21 is oscillatably mounted in standard 2.
  • An arm 23 extends from block 21 and has'pivotally connected thereto one end of a tie rod 24.
  • the cloth feed shaft 26 is mounted in the flaps 25 of work support plate 1, and effects the vertical movement of cloth feed 18.
  • Shaft 26 is driven, in the usual manner, through crank 27 and eccentric rod 28 which, in turn,
  • arm 3 includes a device for setting the degree of oscillation of rocker shaft 7 as well as that of cloth feed shaft 17.
  • a setting shaft 31 is positioned in arm 3, as by being mounted for angular adjustment about its axis in housing walls 29 and 30.
  • a rocker 32 is provided with two legs 33a and 33b, which rotatably receive shaft 31 but are fixed against axial displacement relative to this shaft.
  • One leg 33a is connected through tie rod or link 24 with stitch setting sliding block 21.
  • Block 21 is biased in the direction required for forward sewing by means of tension spring 34 having one end coupled to arm 23 and the other end coupled to standard 2.
  • the other leg 33b of rocker 32 has an extension or arm 35 carrying a pin 36.
  • Pin 36 is engaged in the forked end of a link 37 whose opposite end is pivotally connected to a crank 39 secured fixedly on a polygonal, such as hexagonal, cross section shaft 40 having circular cross section hubs at its opposite ends mounted, for angular adjustment of shaft 40 about its axis, in circular apertures in housing walls 29 and 30.
  • a double-arm support 42 having a bore 41 intermediate its ends, is mounted on shaft 40,'and the diameter of bore 41 corresponds to the distance between two diagonally opposite edges of shaft 40 so that support 42 is angularly adjustable about the axis of shaft 40.
  • Support 42 is spanned by a yoke 44 mounted on shaft 40 for displacement axially of the latter by virtue of being formed with bearing recesses 43.
  • Yoke 44 is connected, through an extension or stay 45, with a setting device or knob 46.
  • Bearing recesses 43 of yoke 44 have a polygonal profile corresponding to the polygonal cross section of shaft 40.
  • Stay 45, with settingv means 46 extends outwardly of arm 3 from under an openable cover 47, as shown in FIG. 1.
  • Setting device 46, and particularly stay 45 is provided with an indicating mark 48 which is cooperable with an indicating pattern 49 provided on the exterior surface of cover 47.
  • a scanning means or element 50 having a conical or frusto-conicalv surface, is secured to support 42 and extends in the direction of its axis into a cutout 51 of rocker 32.
  • the longer opposite sides of cutout 51 aredefined by a setting cam 52, for the size of the stitch length in the forward sewing direction, and a'setting cam 53, for the size of the stitch length in a backward sewing direction.
  • the two setting earns 52 and 53 are symmetrical so that, upon sewing backward, the same stitch length results as-adjusted for farward sewing.
  • tension spring 34 shown in FIG. 2
  • rocker 32 is biased in a direction to maintain setting cam 52 in engagement with scanning means or element 50.
  • the effective length of scanning element engaged with cam 52 and serving to set the stitch length is adjustable by displacement of frusto-conical element 50 lengthwise of itself or substantially perpendicularly relative to the surface of cam 52. This penrnits a fine adjustment of the minimum stitch length, such asis'required, in particular, for the production of close .caterpillar seams when using thread or yarn of different thicknesses.
  • One arm of support 42 is formed with a fork 54 embracing an eccentric straight guide 56 mounted, for angular or rotational adjustment, in housingwall 29, by means of a collar.55.
  • Guide 56 is designed as a tubular guide so as to allow rocker shaft 7 to conformingly extend therethrough.
  • guide 56 can be angularly adjusted about shaft 7.
  • support 42 is pivoted so that the scanning means or element 50' will extend more or less deeply into cutout 51.
  • the set adjusted position of guide 55 may be maintained by .any suitable means, which have not been illustrated.
  • Support 42 is provided with a scanning means, such as a finger 58, engaging the setting cam 59 of a rocker 60 which is freely oscillatable on setting shaft 31.
  • the free end of rocker 60 carries a pin 61 which extends into a fork 62 of a double-armed lever 64 oscillatably mounted on housing wall 30 by means of a pin 63.
  • a tension spring 65 has one end engaged with lever 64 and its other end engaged with housing wall 30. Spring 65 biases rocker 60 toward abutment with scanning means 58, or biases lever 64 toward engagement with an eccentric abutment disc 66 angularly adjustably mounted on housing wall 30.
  • Lever 64 which is formed with an enlarged recess 67 for passage of setting shaft 31 therethrough, with substantial clearance, has one end formed with a slot 68 into which there extends a pin 69.
  • Pin 69 extends through a slot 70 in housing wall 30 and is secured in an angle member 71 which is freely oscillatable on the end of setting shaft 31, which latter also extends through wall 30.
  • member 71 is connected, through a pitman 72, with an overstitch sliding block 73 mounted for rotation in a bore 74 in the free end of an arm 75 fastened on setting shaft 31.
  • a slide 77 is slidably mounted in a guideway 76 of block 73, and is oscillatably carried by one end of a lever 78.
  • the other end of lever 78 is pivotally connected to a crank arm 79 fastened on the end of rocker shaft 7 extendig through housing wall 30.
  • Crank arm 79 is oscillated by means of an eccentric rod or link 80 having an end pivotally connected to lever 78 between the ends of the latter.
  • Eccentric rod 80 is driven by means of a pinion 81 secured on arm shaft 12 and meshing with a gear 82 which has twice the number of teeth of pinion 81.
  • Gear 82 has secured thereto a triangle form eccentric 83 embraced by link 80', and is mounted on an axle 84 secured in housing wall 30.
  • Gear 82, eccentric 83 and rod or link 80 are secured in operative relation by a disc 85 retained on axle 84 by means of a guard ring 86, this guard ring preventing displacement of the parts axially of axle 84.
  • hand lever 87 is secured to setting shaft 31 and has a nose 90 extending therefrom. Nose 90 engages in ratchet depressions 88 of a ratchet lever 89 which is hingedly mounted in arm 3. A torsion spring 91 holds the selected ratchet depression in engagement with nose 90.
  • each of the setting cams 52 and 53 of rocker 32, for adjusting the stitch length, as well as the setting cam 59 of rocker 60, for adjusting the overstitch is subdivided into plural merging or linearly consecutive sections, such as 52a-52d, 53a53d, and 5911-5911, respectively.
  • Section 59a is shown in dash-dot lines in FIG. 3, since its function can be effected by disc 66, and therefore its construction as part of rocker 60 is superfluous.
  • section 59a or abutment disc 66 in engagement with lever 64, maintains the overstitch at a constant value of zero
  • section 59b varies the overstitch value linearly from zero to a maximum
  • section 590 maintains the overstitch at the maximum value
  • section 59d varies the overstitch value from its maximum to zero.
  • the feed value decreases from a maximum to a minimum close to zero.
  • this minimum is maintained.
  • sections 52c and 530 the feed value is again increased to the maximum.
  • sections 52d and 53d the maximum feed value is again reduced to substantially zero.
  • the indicating pattern 49 illustrates the conjoint overstitch width and stitch length resulting from displacement of support 42, these illustrations being symbolized as continuous interconnected individual stitches.
  • the individual stitches are identical replicas of the stitch forrns characteristic of respective settings of knob 46. That is, each stitch is an identical replica of the average stitch form of the adjustment range covered by such individual stitch as illustrated in the indicating pattern 49.
  • the individual sections 49a-49d of pattern 49 represent the stitch patterns resulting from the conjoint effect of the sections 52a-52d, 53a53d, and 59a- 59d of the setting earns 52 and 59, respectively.
  • the selection of a stitch form having a certain overstitch width and a certain stitch length, and the setting of the machine to make this stitch form is effected by displacing manually operated setting device 46 which observing the relation of indicating mark 48 to the desired stitch form as appearing upon the indicator pattern 49.
  • setting device 46 When setting device 46 is displaced, yoke 44 carries along the support 42, so that the latter is displaced parallel to straight guide 56 due to the engagement of fork 54 with guide 56.
  • Sewing of a backward seam is effected by depressing setting device 46.
  • This angularly displaces shaft 40 through yoke 44.
  • crank 39 through link 37 and rod 36, angularly displaces arm35 and thus rocker 32 against the bias of tension spring 34.
  • This elfects engagement of setting cam 53 with scanning means 50, and stitch setting sliding block 21 is rotated, through tie rod 24, into the backward sewing position.
  • rocker 32 Upon release of setting device 46, rocker 32 returns to its illustrated position under the bias of spring 34 so that scanning means 50 again engages setting cam 52, which is the cam controlling sewing in a forward direction.
  • the feed length is somewhat increased.
  • the stitch density can be adapted, by the described adjustment, in very fine gradations to the thickness of the thread or yarn used for sewing in the range of the smallest stitch length.
  • rocker 6G in one direction can be limited by abutment disc 66. By this means, it is possible to obtain an exact adjustment of the zero position, in which needle shank guide performs no overstitch deflec tion whatsoever. Due to the provision of this limitation of the deflection of rocker 60, section 59a of setting cam 59 on rocker 60, coordinated with sections 52a and 5311 on rocker 32, can be omitted.
  • the stitch field position of the particular seam desired can be set by means of hand lever 87, which ecomes accessible by opening cover 47. Hand lever 87 is then adjusted so that nose 90 engages in one of the three ratched depressions 88. Due to the resulting angular movement of arm 75 secured to setting shaft 31 and carrying overstitch sliding block 73, the stitch field position is varied accordingly,
  • the setting cams may be in direct drive connection with setting device 46 in a kinematic reversal of the described and illustrated design. In such a case, the scanning means are then connected with the stitch adjustment means of the machine.
  • the setting cams may be formed on the circumferences or on the side surfaces of corresponding cam discs. In such cases, it is desirable to fasten the cam discs on a setting shaft and to provide, on an end of this setting shaft protruding from the sewing machine housing, a manually operated setting means in the form of a shaft turning knob.
  • an additional scanning means is provided, for example, on support 42, and cooperates with a setting cam arranged on setting shaft 31.
  • the adjustment of the stitch field position, with this arrangement, is controlled through the additional setting cam and the setting shaft 31 upon actuation of setting device 46.
  • indicating mark 48 is applied directly to adjustment means 46 or to its support arm 45.
  • the indicating mark 48 could be coupled to setting means 46 through suitable transmission elements, so that, upon actuation of setting means 46, mark 48 will point to that stitch form, of indicating pattern 49, corresponding to the setting of switch knob 46.
  • the pattern 49 is provided on the exterior surface of the housing of the sewing machine.
  • the indicating pattern 49 may be applied directly to setting device 46. This is particularly advantageous when device 46 is designed as a rotatable knob, rather than as a laterally displaceable knob as shown in the drawings.
  • setting mark 48 would be provided in a fixed position on the housing of the sewing machine and the setting device would be movable with respect to the relatively fixed setting mark.
  • indicating mark 48 and pattern 453 can be effected will be apparent.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; and a single manually operable setting device operative to effect displacement of said scanning means and both of said setting cams to effect conjoint adjustment of the overstitch width and the stitch length.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting earns; a single manually operable setting device operative to effect displacement of said scanning means and both of said setting cams to effect conjoint adjustment of the overstitch width and the stitch length; and indicating means for indicating the particular stitch form set by said setting device, said indicating means including a pair of relatively movable indicator elements, one of which is coupled to said setting device for movement in accordance with operation of they latter.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; and a single manually operable setting device connected to said scanning means to effect displacement of said scanning means and said setting cams simultaneously, to effect conjoint adjustment of the overstitch width and the stitch length.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjustting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; a single manually operable setting device connected to said scanning means to effect displacement of said scanning means and said setting cams simultaneously to effect conjoint adjustment of the overstitch width and the stitch length; and indicating means for indicating the particular stitch form set by said setting device, said indicating means including a pair of relatively movable indicator elements, one of which is coupled to said setting device for movement in accordance with operation of said setting device.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; a single manually operable setting device operative to effect displacement of said scanning means and both of said setting cams to effect conjoint adjustment of the overstitch width and the stitch length; and indicating means for indicating the particular stitch form set by operation of said setting device, said indicating means including a stitch pattern element indicating the particular stitch form set and composed of a series of identical replices of the respective stitch forms corresponding to each setting of said setting device; and an indicator element movable relative to said pattern element, one of said elements being coupled to said setting device for movement in accordance with operation of the latter.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; a single manually operable setting device connected to said scanning means to effect displacement of said scanning means said setting cams simultaneously, to etfect conjoint adjusttment of the overstitch width and the stitch length; a stitch form indicating pattern on the housing of said machine adjacent said setting device, said pattern comprising a succession of identical replicas of the particular stitch form charac teristic of a respective setting of said setting device; and an indicator mark cooperable with said pattern and coupled to said setting device for displacement relative to said pattern in accordance with the setting of said setting device.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; a single manually operable setting device connected to said scanning means to effect displacement of said scanning means and said setting cams simultaneously, to effect conjoint adjusttment of the overstitch width and the stitch length; a stitch form indicating pattern on the housing of said machine adjacent said setting device, said pattern comprising a succession of identical replicas of the particular stitch form characteristic of a respective setting of said setting device; and an indicator mark on said setting device movable relative to said pattern in accordance with operation of said setting device.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a pair of setting cams, each operatively associated with a respective one of said adjusting means; scanning means operatively engageable with both of said setting cams; and a single manually operable setting device connected to said scanning means to effect displacement of said scanning means and said setting cams simultaneously, to efiect conjoint adjustment of the overstitch width and the stitch length, each of said setting cams being subdivided into linearly sucessive and merging sections; said cams extending parallel to each other and each section of one cam corresponding in length and position toa respective section of the other cam; each cam including a pair of immediately successive sections in one of which the profile height is constant and in the other of which the profile height varies uniformly; the constant profile height section of one cam corresponding to the variable height section of the other cam and the variable profile height section of said one cam corresponding to the. constant profile height section of said other cam; whereby, by operation
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting camoperatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; a support movable in a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; and a single manually operable setting device operable to displace said support along its linear path to efiect displacement of said first and second setting cams by said first and second scanning 10 means, respectively, to effect conjoint adjustment of the overstitch width and the stitch length.
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitich length; said setting cams extending in spaced parallel relation to each other; a support movable in'a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; and a single manually operable setting device operable to displace said support along its linear path to eflect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment of the overstitch width and the stitch length; each of said setting cams being subdivided into linearly successive and merging sections, each section of said first cam corresponding in length and position to a corresponding section of said second cam, and vice versa; each
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; a support movable in a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; and a single manually operable setting device operable to displace said support along its linear path to efiect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment of the overstitch width and the stitch length; each of said setting cams being subdivided into linearly successive and merging sections, each section of said first cam corresponding in length and position to a corresponding section of said second cam, and vice versa; each of
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; a support movable in a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; a single manually operable setting device operable to displace said support along its linear path to effect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment of the overstitch width and the stitch length; each of said setting cams being subdivided into linearly successive and merging sections, each section of said first cam corresponding in length and position to a corresponding section of said second cam, and vice versa; each of said cams including
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means'for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; a support movable in a fixed linear path relative to said setting earns; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; and a single manually operable setting device operable to displace said support along its linear path to effect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment-of the overstitch width and the stitch length; said second cam comprising a relatively elongated cutout forming a pair of first and second cam surfaces arranged in opposing relation to each other; said first cam surface controlling said means for adjusting the stitch length during forward sewing and
  • a zigzag sewing machine comprising, in combination, means foradjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with saidmeans for adjusting the overstitch width; a second setting cam operatively associated with said means-for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; asupport movable in a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cams; a secondscanning means fixed to said support and engageable with said second setting cam; a single manually operable setting device operable to displace said support along its linear path to efiect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment of the overstitch width and the stitchlength; said second cam comprising a relatively elongated cutout forming a pair of first and second cam surfaces arranged in opposing relation to each other; saidfirst cam surface controlling said means for adjusting the stitch length
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said setting cams extending in spaced parallel relation to each other; a support movable in a fixed linear path relative to said setting cams; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting cam; and a single manually operable setting device operable to displace said support along its linear path to effect displacement of said first and second setting cams by said first and second scanning means, respectively, to effect conjoint adjustment of the overstitch width and the stitch length; said second cam comprising a relatively elongated cutout forming a pair of first and second cam surfaces arranged in opposing relation to each other; saidfirst cam surface controlling said means for adjusting the stitch length during forward sewing and said second
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said cams extending linearly in spaced parallel relation to each other; a pivotally mounted support movable along said cams parallel to its pivot axis; guiding means guiding said support for rectilinear movement parallel to said cams, said support being oscillatable perpendicular to its direction of rectilinear displacement; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and engageable with said second setting earn; a single manually operable setting device operative to displace said supportalong its rectilinear guiding means relative to both of said setting cams to effect conjoint adjustment of the overstitch width and the stitch length; said second cam being formed with a cutout providing first and second linerly
  • a zigzag sewing machine comprising, in combination, means for adjusting the overstitch width; means for adjusting the stitch length; a first setting cam operatively associated with said means for adjusting the overstitch width; a second setting cam operatively associated with said means for adjusting the stitch length; said cams extending linearly in spaced parallel relation to each other; a pivotally mounted support movable along said cams parallel to its pivot axis; guiding means guiding said support for rectilinear movement parallel to said cams, said support being oscillatable perpendicular to its direction of rectilinear displacement; a first scanning means fixed to said support and engageable with said first setting cam; a second scanning means fixed to said support and en-ga-geable with said second setting cam; a single manually operable setting device operative to displace said support along its rectilinear guiding means relative to both of said setting cams to effect conjoint adjustment of the overstitch Width and the stitch length; said second cam being formed Will a cutout
  • said first and second cam surfaces being arranged inversely relative to each other; said second scanning means extending into said cutout and having a conical surface whose axis is perpendicular to the linear extent of said second cam whereby, upon relative angular adjustment of said support about its pivot axis, the diameter of said conical surface engageable with said first and second cam surfaces is varied; said support having a forked end engaging its rectilinear guiding means; said rectilinear guiding means being adjustable perpendicularly to its linear extent to angularly adjust said support about its pivotal mounting; an angularly adjustable setting shaft coupling said second carn to said means for adjusting the stitch length; a manually operable lever secured to said setting shaft to angularly adjust the same to shift the stitch field; and releasable latch means cooperable with said lever to releasably maintain the same in a selected one of several adjusted positions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US439771A 1964-03-17 1965-03-15 Zig-zag sewing machine with single manually operable setting device for both overstitch width and stitch length Expired - Lifetime US3353509A (en)

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DE1964P0033857 DE1485270B1 (de) 1964-03-17 1964-03-17 Einrichtung zum Einstellen der UEberstichbreite und der Stichlaenge bei Zickzacknaehmaschinen

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US3353509A true US3353509A (en) 1967-11-21

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US (1) US3353509A (xx)
JP (1) JPS538248B1 (xx)
AT (1) AT269616B (xx)
CH (1) CH424443A (xx)
DE (1) DE1485270B1 (xx)
ES (1) ES310542A1 (xx)
FR (1) FR1434432A (xx)
GB (1) GB1078475A (xx)
NL (2) NL6503323A (xx)
OA (1) OA01556A (xx)
SE (1) SE311467B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433092A (en) * 1965-10-20 1969-03-18 Janome Sewing Machine Co Ltd Pattern cam selecting arrangement
US3957003A (en) * 1973-04-13 1976-05-18 Georges Drevet Simplified control mechanisms for sewing machines

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064603A (en) * 1959-10-21 1962-11-20 Fuji Seimitsu Kogyo Kabushiki Speed-changing cam device for zigzag sewing machines
US3238905A (en) * 1963-06-26 1966-03-08 Mefina Sa Sewing machines
US3247817A (en) * 1960-12-08 1966-04-26 Janome Sewing Machine Co Ltd Ornamental stitch sewing machine

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US1611372A (en) * 1924-03-15 1926-12-21 Nolde & Horst Co Control attachment for embroidery-sewing machines
DE1027970B (de) * 1955-09-12 1958-04-10 Pfaff Ag G M Stichstelleinrichtung fuer Naehmaschinen
DE1027494B (de) * 1955-11-10 1958-04-03 Wittenberge Naehmasch Veb Zickzack-Naehmaschine zum Herstellen unterschiedlicher Ziernaehte
AT219947B (de) * 1957-06-26 1962-02-26 Gritzner Kayser Ag Nähmaschine mit Ziersticheinrichtung
DE1077039B (de) * 1958-03-19 1960-03-03 Pfaff Ag G M Das Nahtbild anzeigende Vorrichtung an Naehmaschinen mit Ziernahteinrichtung
DE1086981B (de) * 1959-11-27 1960-08-11 Carl Sieper Fa Kindernaehmaschine mit einer Stichverstelleinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064603A (en) * 1959-10-21 1962-11-20 Fuji Seimitsu Kogyo Kabushiki Speed-changing cam device for zigzag sewing machines
US3247817A (en) * 1960-12-08 1966-04-26 Janome Sewing Machine Co Ltd Ornamental stitch sewing machine
US3238905A (en) * 1963-06-26 1966-03-08 Mefina Sa Sewing machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433092A (en) * 1965-10-20 1969-03-18 Janome Sewing Machine Co Ltd Pattern cam selecting arrangement
US3957003A (en) * 1973-04-13 1976-05-18 Georges Drevet Simplified control mechanisms for sewing machines

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Publication number Publication date
OA01556A (fr) 1969-07-21
JPS538248B1 (xx) 1978-03-27
NL6503323A (xx) 1965-09-20
DE1485270B1 (de) 1970-04-30
GB1078475A (en) 1967-08-09
CH424443A (de) 1966-11-15
NL136919C (xx)
ES310542A1 (es) 1965-06-01
FR1434432A (fr) 1966-04-08
SE311467B (xx) 1969-06-09
AT269616B (de) 1969-03-25

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