US1017426A - Sewing-machine. - Google Patents

Sewing-machine. Download PDF

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Publication number
US1017426A
US1017426A US41415908A US1908414159A US1017426A US 1017426 A US1017426 A US 1017426A US 41415908 A US41415908 A US 41415908A US 1908414159 A US1908414159 A US 1908414159A US 1017426 A US1017426 A US 1017426A
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needle
needle bar
shaft
actuating
holder
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US41415908A
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James Leathem
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Hermann Aukam & Co
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Hermann Aukam & Co
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement

Definitions

  • This invention relates to sewing machines, more particularly to the needle motions for such machines, and the objects of the invention are to improve the construction of such machines and increase their efficiency of operation.
  • the general structure of a sewing machine is not affected, the machine comprising, as is usual, a bed plate, an overhanging arm, a needle bar mounted to reciprocate up and down in the end of this arm, means for so reciprocating it, and the usual needle plate, feed mechanism, etc.
  • hem-stitching it is de sired that two stitches be placed off the hem fold and one on.
  • One means of doing this is to provide the needle bar with a vibrating needle carrier which is adapted to be operated in connection with a feeding mechanism capable of imparting two forward movements to the material alternating with one backward movement, the needle being kept perpendicular to place the two stitches off the hem fold and inclined by suitable vibrating mechanism to place one stitch on the hem fold.
  • the needle is actuated so as to permit of the material being fed only forward, and not backward and forward as is customary in what are called return feed machines.
  • the needle is moimted in a holder, on a rotary shaft, carried by the needle bar in its reciprocations, the needle being eccentric to the axis of rotation of the shaft, means being provided for rotating said shaft intermittently, a part of a revolution each time the needle bar ascends.
  • the said shaft rotates one third of a revolution during each rise of the needle bar, the holes made by the needle in the material being, therefore, arranged in a triangle, two 011' the hem fold and one on.
  • each set of needle holes shall not be at the corners of an equilateral triangle, as may be produced by a needle mounted eccentrically on an intermittently-rotating shaft, as described, but shall be at the corners of what is, actually or approximately, a right angled triangle, so that half of the stitches crossing the line of the hem-fold shall cross at right angles.
  • the needle is not only eccentrically mounted in relation to the shaft but is also eccentrically mounted in relation to the needle holder. Therefore I do not mount the needle directly on said intermittently rotating shaft, but upon a needle holder, the motion of which is modified with reference to that of the shaft by cam mechanism hereinafter described.
  • Suitable means are provided for feeding the material forward after a complete revolution of the shaft, so that the needle will on its second entrance into the material, to place the second stitch off the hem fold, enter the hole made by the needle in the first stitch off the hem fold, made in the preceding series of stitches.
  • Figure 1 is a side elevation with parts broken away of a machine showing one embodiment of my invention
  • Fig. 2 is a bottom view of the machine showing the feeding mechanism
  • Fig. 3 is an end view with a portion of the bed plate in cross section
  • Fig. 4 is a detail end View of the head of the machine with the face plate removed showing the needle bar in its uppermost position
  • Fig. 5 is a detail View similar to Fig. 4 with parts broken away showing the needle bar in its lowest position
  • Fig. 6 is a detail view of a part of the feeding mechanism
  • Fig. 7 is an enlarged detail view, partly in section and with parts broken away of the needle bar, showing the needle in a descending position to place the first stitch off the hem
  • Fig. 1 is a side elevation with parts broken away of a machine showing one embodiment of my invention
  • Fig. 2 is a bottom view of the machine showing the feeding mechanism
  • Fig. 3 is an end view with a portion of the bed plate in cross section
  • Fig. 4
  • Fig. 8 is a view similar to Fig. 7 with the needle in a descending position to place the second stitch off the hem
  • Fig. 9 is a view similar to Figs. 7 and 8 with the needle in a descending position to place the first stitcl'i on the hem
  • Figs. 10, 11 and 12 are detail views of a portion of the material to be hemmed showing respectively the holes made by the needle in its different downward movements as shown in Figs. 7, 8 and 9
  • Figs. 13, let and 15 are respectively, cross sectional views on the lines 18-13, 1 1 14 and 15-15 of Figs. 7, 8 and 9 showing the relative positions of the cams in relation to the hem of the material
  • FIG. 16 is a detail sectional view on the line 1616 of Fig. 7;
  • Fig. 19 is a detail view of a piece of material showing a series of stitches made by the machine;
  • Fig. 20 is a detail view of the end of the needle bar embodying an alternative form, the needle being in position to place the first stitch off the hem;
  • Fig. 21 is a detail view similar to Fig.
  • F igs.-22 and 23 are detail views of a portion of the material showing respectively the holes made by the needle in its different downward movements as shown in Figs. 20 and 21;
  • Fig. 24 is a detail perspective view of the cylindrical block;
  • Fig. 25 is a detail perspective View of the actuating cam.
  • A designates the bed plate, B the overhanging arm in which is mounted the needle bar actuating shaft C, to the end of which is secured the hub D, provided with the peripheral cam slot E which actuates the take-up lever F, one end of which extends through the slot G in the face plate H which is secured to the head J.
  • the needle bar 1 is mounted in the head J, and is reciprocated by means of a link 2, one end of which is pivoted to the hub D, and the other end of which is pivoted to the collar 3 secured to the needle bar 1.
  • the needle bar 1 is made hollow throughout its length so as to contain the actuating shaft 4, the upper end of which extends a short distance above the upper end of the needle bar 1, and is secured to a collar 5, which bears upon the top of the needle bar 1, said collar being provided with a feather 6, which is arranged to engage a vertical groove 7 on the inner side of a guide sleeve 8, which, with the actuatingshaft 4, is adapted to rotate about the axis of the needle bar 1, which latter is held against rotation by means of the collar 3 secured to the link 2, before described.
  • the actuating shaft 4 is provided near its lower end with a circular shoulder 9, which fits into a corresponding recess in the needle bar 1, so that the actuating shaft 4 is held from moving vertically in relation to the needle bar 1 by means of the collar 5 at one end, and the shoulder '9 at the other end, but at the same time may be rotated.
  • the guide sleeve 8 is rotatably mounted in a suitable bearing 10, on the head J of the machine, and is held in position by means of cap 11, secured to the top of the sleeve, which bears upon the top of the bearing 10, and a flange or collar 12, also secured to the guide sleeve 8, which bears against the bottom of the bearing 10.
  • actuating sleeve 13 Rotatably mounted upon the lower portion of the guide sleeve 8 is an actuating sleeve 13, which is provided on the inside with three equally spaced vertical grooves 14, which are adapted to successively engage a short feather 15 situated on the guide sleeve 8, a short distance below the collar 12.
  • the actuating sleeve 13 is provided with a series of holes 151, which are adapted to be engaged by the pins 16, of a segmental rack 17, secured to the link 2, by means of which the actuating sleeve 13 is oscillated and reciprocated as the hub D rotates.
  • the segmental rack 17 is curved on the arc of a circle whose center is the point where the link 2 is pivoted to the collar 3, and is at such a distance above said center that one of the three grooves 1 1 will engage the feather 15 on the guide sleeve 8, every time the hub D rotates, and thus turn the actuating sleeve 13, the guide sleeve 8 and the actuating shaft 4 one third of a revolution.
  • the actuating sleeve 13 is of such a length that it will not come in contact with the head of the machine when the link 2 has moved said sleeve to its highest position.
  • the bottom of the actuating sleeve 13 preferably rests upon the top of the collar 3 and is preferably contracted near the bottom so as to form a suitable bearing surface around the needle bar.
  • the guide sleeve 8 is of such length as A not to interfere with the reciprocation of the actuating sleeve 13 or the collar 3.
  • the feather 15 is so located on the guide sleeve 8 that the grooves 14- are adapted to successively engage the same when the pivot point I guide sleeve 8 only a third of a revolution, the grooves 14 are made slightly wider than the feather 15, so that while a groove 14 passes over the lower end of the feather 15 when the link is passing upward from its extreme left hand position, it does not come in actual contact with the feather and turn the guide sleeve 8 until the groove 14 has passed upward for a short distance, at which point the groove 14, which has been rotated but a slight distance, comes into actual engagement with the feather 15 and turns the guide sleeve 8 a third of a revolution before the groove 14 leaves the same when the link 2 has reached its extreme right hand position.
  • the groove 14 is also made wider than the feather 15 so as to insure the registering of the groove with the feather.
  • the needle bar 1 together with the actuating shaft 4 and the actuating sleeve 13, is moved to its extreme downward position and then up again until the pivot point of the link 2 on the hub D has again reached its extreme left hand position, at which point the next successive groove 14 is adapted to pass over the feather 15 so as to turn the guide sleeve 8, which actuates the actuating shaft 4, another third of a revolution.
  • the actuating shaft 4 makes one complete revolution to every three revolutions of the hub D.
  • a flat spring 18, secured tovthe head J preferably is provided, which is adapted to successively engage three flat notches 19 on the cap 11, and hold the guide sleeve 8 and the actuating shaft 4 from rotating, until one of the grooves 14 of the actuating sleeve 13 again engages the feather 15; whereupon the spring 18 is pressed outward and engages the adjacent notch 19 and again retains the guide sleeve 8 and the actuating shaft 4 in position until the same are again operated by the actuating sleeve 13.
  • a cylindrical recess 20 in which is adjustably mounted a cylindrical block 21 by means of a set screw 22.
  • the cylindrical block 21 is provided with an eccentric bearing 23 in which is ournaled a stud 24, secured to an actuating cam 25, the stud 24 being rotatably secured in the bearing 23 by suitable means such as a screw 26, the head of which engages the top of the cylindrical block 21.
  • the bottom of the cylindrical block 21 is preferably provided with a flange 27, adapted to bear against the bottom of the actuating shaft 4.
  • the actuating cam 25 is provided with two depending lugs 28 which are spaced apart and adapted to support a needle holder 29 which is preferably pivoted to the lugs 28 by means of a pivot pin 30.
  • the needle holder 29 is provided with a hole 30 in which the upper end of the needle 31 is secured by means of a suitable set screw 32.
  • the needle 31 is set eccentrically to the actuating shaft 4 and also eccentrically to the stud 24 of the actuating cam 25.
  • the actuating cam 25 is adapted to oscillate about a pin 33 in the needle bar 1 which engages a slot'34 in said actuating cam.
  • the throw of the needle 31 is regulated by the distance the actuating cam 25 is 'set off the center of the actuating shaft 4 and is further regulated by the distance the needle is set off the center of the actuating cam 25 and also by the position of the pin 33.
  • the needle 31 were set in the needle holder 29 so as to be in line with the center of the actuating cam 25, it would be found that the needle would in its three successive movements into the material make three stitches which would be equally spaced apart, so as to form an equilateral triangle, but in order to space the stitches at unequal distances apart, the needle is set in the needle holder 29 so as to be off the center of the actuating cam 25, which will permit the needle in its three successive movements into the material to space the stitches at unequal distances apart, so as to form a triangle the sides of which are of different lengths, depending upon the distance the needle is set off the center of the actuating cam.
  • the relation of the three stitches to each other is also varied by the position of the pin 33 and its relation to the actuating cam 25, the throw of which can be varied in relation to the pin- 33 by turning the needle bar 1 which is accomplished by loosening the collar 3.
  • the needle is set at a greater distance off the center of the actuating cam 25 than'the actuating cam is set off the center of the actuating shaft 4.
  • the needle can be adjusted to place two stitches off the hem fold and one on, the stitches off the hem being in line with each other while the stitch in the hem is preferably at right angles to one of the stitches made 011' the hem.
  • the relative position of the needle in its three consecutive positions before entering the material is shown in Figs.
  • Figs. 10, 11 and 12 the material 35 with the corresponding holes made by the needle which are marked respectively, a, b and 0.
  • Figs. 13, 14 and 15 which are views in cross section on the lines 1313; 1414 and 1515 respectively of Figs. 7 8 and 9, showing the relative position of the actuating cam 25 in its three successive positions.
  • the number of stitches to the inch or the distance between the holes a and b can be regulated by turning needle bar 1 as before described or by changing the position of the pin 33 on the end of the needle bar 1, additional holes 36 being provided for this purpose. In this manner the distance between the holes .7) and 0 can also be varied.
  • the needle holder 29 is provided with an outwardly eX- tending arm 37, the top of which is provided with a cam surface 38 adapted to engage the end of the pin 33, which in such case extends below the bottom of the slot 34 for that purpose.
  • the cam surface 38 is cut away so as to not engage the pin 33 when the needle is in position to place the first stitch off the hem, but when the needle moved forward by means of the actuating cam 25 to place the second stitch off the hem, as shown in Fig. 21, the needle is given an additional movement forward by the action of the pin 33 on the cam surface 38, which causes the needleholder 29 to turn on the pivot pin 36 that the needle will enter the material in advance of where it would otherwise enter.
  • the actuating cam 25 has moved the needle back to its third'position to place the stitch on the hem the cam surface 38 will not en gage the pin 33, as the cut away portion of the cam surface 38 will be in approximately the same position as that shown in Fig. 20 for the first position of the needle.
  • the needle holder 29 is held in normal position by means of a spring 39 in a recess 40 in the needle holder and adapted to bear against the bottom of the actuating cam 25.
  • the additional. throw of the needle can be varied by adjusting the position of the pin 33 so'that the same will extend to a greater or less distance below the bottom of the slot 34, or by varying the shape of the cam surface 38.
  • the throw of the needle can also be adjusted to vary the number of stitches to the inch by inserting different cylindrical blocks 21, in which the bearing 21 is set more or less off the center of the actuating shaft 4.
  • Different needle holders 29 may also be provided in which the needle may be inserted at various distances off the center of the actuating cam 25.
  • a piercer 45 is provided which is secured to needle bar 1 in one of the holes 36, such piercer being adapted to puncture the ma terial off the hem fold at every descent of the needle.
  • the needle bar actuating shaft C has, it will be supposed, two cranks, which actuate like connecting rods 50 and 51, engaging respectively two cranks on the under shaft 52, provided at its front end with a gear 53 which meshes with a gear 54, secured to one end of a short shaft 55, near the middle of which is secured abeveled gear 56, which meshes with a gear 571, secured to a shaft 57 the rotation of which operates a suitable shuttle. Secured near the center of the under shaft 52 is a small gear 58 which meshes with a large gear 59 secured to a shaft 60.
  • the gear 59 is rotated once for each three rotations of the shaft 52 and has connected to or forming part of it a cam 61 (as shown in Fig. 6), said cam having a cam groove 62,, in which enters a stud 63 which is secured to an arm 64, secured to one end of a short shaft 65 the other end of which is secured to a feed rocker 66, provided with a groove 67 in which enters a shoe or block 68 secured to one end of a lever 69, the other end of which is secured to an arm 70 which actuates the rock shaft 71.
  • the lever 69 has pivoted to it the lower end a link 75, by which the lever 69 may be raised or lowered to vary the length of the stitch.
  • the shaft 60 has secured to its other end a cam 76 which operates an arm 77 secured to one end of a rock shaft 78 the other end of which is provided with an arm 79 which engages the forward end of the feed dog 74. It will be obvious that the feeding device may be so actuated that the same will feed the material forward once to every three revolutions of the needle bar actuating shaft.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, an actuating shaft rotatably mounted therein, a guide sleeve, and an actuating sleeve connected to said actuating shaft, and an oscillating rack arranged to operate the same for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, an actuating shaft rotatably mounted therein, a guide sleeve, and an actuating sleeve connected to said actuating shaft, an oscillating rackarranged to operate the same for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar, and a needle holder eccentrically mounted on said actuating shaft.
  • a stitch forming mechanism comprising a reciprocating needle bar, an intermittently rotatable shaft therein, a needle holder eccentrically mounted on said shaft and arranged to produce a series of at least three stitches of unequal length one for each reciprocation of the needle bar, means for holding the material stationary until the series of stitches are completed, and means for feeding the material after the series of stitches have been produced.
  • Stitch forming mechanism comprising needle actuating means arranged to form three stitches of unequal length together forming a right angled triangle within a cycle of operations, and means for holding the work stationary in carrying out such cycle, and means for feeding the work at the conclusion of the cycle.
  • a stitch forming mechanism comprising a reciprocating needle bar, an actuating shaft therein, means for reciprocating said needle bar and said actuating shaft, means for rotating said actuating shaft a third of a revolution during a part of each reciprocation, an actuating cam eccentrically mounted on said actuating shaft, a needle holder mounted on said actuating cam eccentrically to said actuating shaft and ec centrically to said actuating cam, means for regulating the movements of said actuating cam to. form a series of three unequally spaced stitches, and means for feeding the material forward after each series stitches.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder, and means for rotating said shaft intermittently, arranged to rotate same through complete rotations, and means for regulating the oscillations of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, and means for oscillating said needle holder com prising a shaft carried by the needle bar and means for rotating the same through complete rotations, and means for regulating the oscillations of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft mounted in and carried. by the needle bar and means for rotating the same through complete rotations, and means for regulating the oscillations of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder and meansrfor rotating said shaft intermittently, and a fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder ary ranged to be reciprocated thereby, means for oscillating said needle holder comprising a shaft carried by the needle bar and means for rotating the same through complete rotations, and a fixed member secured to said needle bar and having a sliding connection with said needle holdenfor regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a .reciprocating needle bar, a needle holder arcanged to be reciprocated thereby, means for oscillating said needle holder comprising a shaft mounted in and carried by the needle bar, and means for rotating the same through complete rotations, and a fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, means for oscillating said needle holder, said holder arranged to hold a needle eccentrically with respect to its axis of oscillation, and a fixed member secured to said needle bar having a sliding connection with said needle holder whereby the needle holder is given an oscillatory movement.
  • a stitch forming mechanism for sew ing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needlejholder, and
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft. carried by the needle bar and means for rotating the same through complete rotations, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection With said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft mounted in and carried by the needle bar and means for rotating the same through complete rotations, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection With said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder, said holder arranged to hold a needle eccentrically With respect to its axis of oscillation, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for se ing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder, and means for rotating said shaft intermittently, arranged to rotate same through complete rotations, and a pin secured to said needle bar and Working in a slot of said actuating cam for regulating the movements of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated thereby, and means for oscillating said needle holder and said actuating cam comprising a shaft carried by the needle bar and means for rotating the same through complete rotations, and a pin secured to said needle bar and Working in a slot of said actuating cam for regulating the movements of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocatcd by the needle bar said needle holder being pivoted to said cam, and means for oscillating said needle holder and said actuating cam comprising a shaft mounted in and carried by the needle bar, and means for rotating said shaft through complete rotations.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated by the needle bar said needle holder being pivoted to said cam, means for oscillating said needle holder and said actuating cam, said holder arranged to hold a needle eccentrically with respect to its axis of oscillation.
  • a stitch forming mechanism for seW- ing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, and needle holding means on said member and arranged to hold said needle eccentrically with respect to both said shaft and member.
  • a stitch forming mechanismfor sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically With respect to both said shaft and member, and means secured to said needle bar for regulating the movements of said needle holding means.
  • a stitch forming mechanism for seW- ing machines comprising in combination a reciprocating needle bar, a shaft'rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically with respect to both said shaft and member, and a fixed member secured to said needle bar and having a sliding connec tion With said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically With respect to both said shaft and member, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically with respect to both said shaft and member and a pin secured to said needle bar and working in a slot of said member for regulating the movements of said needle holder.
  • a stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, and a sleeve .surrounding the same, one of said members having a plurality of keyways and the other having a key adapted to move in such keyway, means for oscillating said sleeve back and forth and means for reciprocating said needle bar arranged to move same such distance that said key engages and disengages said keyways.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means on said needle bar rotating in one direction only for oscillating said needle holder, andmeans for regulating the movements of said needle holder.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means on said needle bar rotating in one direction only for oscillating said needle holder, and means secured to said needle bar for regulating the movements of said needle holder.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means for oscillating said needle holder and means secured to said needle bar for regulating the oscillation of said needle holder, said means being also arranged to vary the throw of the needle holder on one of a series of movements.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means for oscillating said needle holder, means for regulating the oscillations of said needle holder and means for varying the throw of the needle holder on one of a series of movements.
  • a stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a shaft rotatably mounted therein, means for completely rotating said shaft step by step when the needle bar is in its upward position, a needle holder operated by said shaft and bar, and means for preventing rotation of the shaft during the lower portion of its travel.
  • a stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a shaft connected to said needle bar, means for intermittently rotating said shaft always in one direction, and a needle holder eccentrically mounted on said shaft.
  • a stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a shaft connected to said needle bar, means for intermittently rotating said shaft always in one direction, a needle holder pivotally connected to said needle bar and eccentrically mounted on said shaft and means for regulating the movements of said needle holding means.
  • a stitch forming mechanism for sew ing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operatively connecting said needle holder to said needle bar, intermittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of stitches.
  • a stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operativelv connecting said needle holder to said needle bar, inter mittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of at least three stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of at least three stitches.
  • a stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operatively connecting said needle holder to said needle bar, intermittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of at least three unequally spaced stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of at least three unequally spaced stitches.
  • a stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted in said needle bar, means for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar, such means being arranged to rotate in one direction only, a needle holder, and means for eccentrically mounting said needle holder on said actuating shaft.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said. needle bar, a shaft mounted on said needle bar, means for intermittently rotating said shaftalways in the same direction, a needle holder, and means for eccentrically mounting said needle holder on said shaft so as to produce a series of stitches one for each reciprocation of the needle bar.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, a shaft mounted on said needle bar, means for intermittently rotating said shaft always in the same direction, a needle holder, means for eccentrically mounting said needle holder on said shaft so as to produce a series of stitches one for each reciprocation of the needle bar, means for holding the material stationary, and means for feeding the material after the series of stitches have been produced.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft and means comprising a rack for intermittently rotating in one direction said actuating shaft a portion of a revolution for each reciprocation of the needle bar.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft, a guide sleeve connected to said actuating shaft, and means for rotating said guide sleeve a portion of arevolution for each reciprocation of the needle bar.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft, a guide sleeve and an actuatin sleeve connected to said actuating shaft and means for oscillating and reciprocating said actuating sleeve.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected to said actuating shaft, an actuating sleeve connected to said guide sleeve, and means for reciprocating and oscillating said actuating. sleeve and a needle holder mounted on said actuating shaft.
  • A. stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected tosaid actuating shaft, an actuating sleeve connected to said guide sleeve, and a rack connected to said reciprocating means for reciprocating and oscillating said actuating sleeve and a needle holder mounted on said actuating shaft.
  • a stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected to said actuating shaft, means for intermit tently rotating said guide sleeve and means for holding the guide sleeve in position When the same is not being rotated and a needle holder mounted on said actuating shaft.

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Description

J. LEATHEM.
SEWING- MACHINE.
- APPLICATION FILED FEB. 4, 190a. 1,01 7,426. Patented Feb. 13, 1912.
4 SHEETS-SHEET 2.
In ventor J. LEATHBMI SEWING MACHINE. APPL IOATION FILED PEBA, 1908.
Patented Feb. 13, 1912.
' 4 SHEETSSHEET 3.
Z in into): v Atty m' Q COLUMBIA PLANOGRAPH 60., WASHINGTON, u. c.
J. LEATHEM. SEWING MACHINE. APILIOATION FILED r2124, 190s.
4 SHEETSSHEET 4.
Patented Feb. 13,1912.
llllll 55 hi: Inv ntor' 0., WASHINGTON D c UNITED STATES PATENT OFFICE.
JAMES LEATHEM, OF NEW YORK, N. Y., ASSIGNOR TO HERMANN, AUKAM & 00., OF
NEW YORK, N. Y., A CORPORATION OF NEW YORK.
SEWING-MACHINE.
T 0 all whom it may concern:
Be it lmown that I, JAMES LEATHEM, a citizen of the United States, residing at New York city, in the county of Richmond and State of New York, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same.
This invention relates to sewing machines, more particularly to the needle motions for such machines, and the objects of the invention are to improve the construction of such machines and increase their efficiency of operation.
Other objects of the invention are to provide a needle motion for a hem stitching machine, which will obviate feeding the material back and forth.
While the invention is to be described with particular reference to a hem stitching machine, and to the details of construction, it is not to be understood as to be limited thereto, as many and various changes may be made, and the same may be embodied in widely varying forms without limiting the invention to the construction shown and described.
According to my invention the general structure of a sewing machine is not affected, the machine comprising, as is usual, a bed plate, an overhanging arm, a needle bar mounted to reciprocate up and down in the end of this arm, means for so reciprocating it, and the usual needle plate, feed mechanism, etc. In hem-stitching it is de sired that two stitches be placed off the hem fold and one on. One means of doing this is to provide the needle bar with a vibrating needle carrier which is adapted to be operated in connection with a feeding mechanism capable of imparting two forward movements to the material alternating with one backward movement, the needle being kept perpendicular to place the two stitches off the hem fold and inclined by suitable vibrating mechanism to place one stitch on the hem fold. Instead of so doing, and according to the present invention the needle is actuated so as to permit of the material being fed only forward, and not backward and forward as is customary in what are called return feed machines.
Specification of Letters Patent.
Application filed February 4, 1908.
Patented Feb. 13, 1912.
Serial No. 414,159.
According to the present invention the needle is moimted in a holder, on a rotary shaft, carried by the needle bar in its reciprocations, the needle being eccentric to the axis of rotation of the shaft, means being provided for rotating said shaft intermittently, a part of a revolution each time the needle bar ascends. customarily, the said shaft rotates one third of a revolution during each rise of the needle bar, the holes made by the needle in the material being, therefore, arranged in a triangle, two 011' the hem fold and one on.
For the methodof stitching which I pre fer, it is desirable that each set of needle holes shall not be at the corners of an equilateral triangle, as may be produced by a needle mounted eccentrically on an intermittently-rotating shaft, as described, but shall be at the corners of what is, actually or approximately, a right angled triangle, so that half of the stitches crossing the line of the hem-fold shall cross at right angles. To this end the needle is not only eccentrically mounted in relation to the shaft but is also eccentrically mounted in relation to the needle holder. Therefore I do not mount the needle directly on said intermittently rotating shaft, but upon a needle holder, the motion of which is modified with reference to that of the shaft by cam mechanism hereinafter described.
Suitable means are provided for feeding the material forward after a complete revolution of the shaft, so that the needle will on its second entrance into the material, to place the second stitch off the hem fold, enter the hole made by the needle in the first stitch off the hem fold, made in the preceding series of stitches.
The accompanying drawings illustrate one form of hem-stitching mechanism such as above described.
In said drawings: Figure 1 is a side elevation with parts broken away of a machine showing one embodiment of my invention; Fig. 2 is a bottom view of the machine showing the feeding mechanism; Fig. 3 is an end view with a portion of the bed plate in cross section; Fig. 4 is a detail end View of the head of the machine with the face plate removed showing the needle bar in its uppermost position; Fig. 5 is a detail View similar to Fig. 4 with parts broken away showing the needle bar in its lowest position; Fig. 6 is a detail view of a part of the feeding mechanism; Fig. 7 is an enlarged detail view, partly in section and with parts broken away of the needle bar, showing the needle in a descending position to place the first stitch off the hem; Fig. 8 is a view similar to Fig. 7 with the needle in a descending position to place the second stitch off the hem; Fig. 9 is a view similar to Figs. 7 and 8 with the needle in a descending position to place the first stitcl'i on the hem; Figs. 10, 11 and 12 are detail views of a portion of the material to be hemmed showing respectively the holes made by the needle in its different downward movements as shown in Figs. 7, 8 and 9; Figs. 13, let and 15 are respectively, cross sectional views on the lines 18-13, 1 1 14 and 15-15 of Figs. 7, 8 and 9 showing the relative positions of the cams in relation to the hem of the material; Fig. 16 is a detail sectional view on the line 1616 of Fig. 7; Fig. 17 is a detail sectional view on the line 1717 of Fig. 7 Fig. 18 is a detail sectional view on the line 181S of Fig. 7; Fig. 19 is a detail view of a piece of material showing a series of stitches made by the machine; Fig. 20 is a detail view of the end of the needle bar embodying an alternative form, the needle being in position to place the first stitch off the hem; Fig. 21 is a detail view similar to Fig. 20, the needle being in position to place the second stitch off the hem; F igs.-22 and 23 are detail views of a portion of the material showing respectively the holes made by the needle in its different downward movements as shown in Figs. 20 and 21; Fig. 24 is a detail perspective view of the cylindrical block; Fig. 25 is a detail perspective View of the actuating cam.
Referring to the drawings A designates the bed plate, B the overhanging arm in which is mounted the needle bar actuating shaft C, to the end of which is secured the hub D, provided with the peripheral cam slot E which actuates the take-up lever F, one end of which extends through the slot G in the face plate H which is secured to the head J.
The needle bar 1 is mounted in the head J, and is reciprocated by means of a link 2, one end of which is pivoted to the hub D, and the other end of which is pivoted to the collar 3 secured to the needle bar 1. The needle bar 1 is made hollow throughout its length so as to contain the actuating shaft 4, the upper end of which extends a short distance above the upper end of the needle bar 1, and is secured to a collar 5, which bears upon the top of the needle bar 1, said collar being provided with a feather 6, which is arranged to engage a vertical groove 7 on the inner side of a guide sleeve 8, which, with the actuatingshaft 4, is adapted to rotate about the axis of the needle bar 1, which latter is held against rotation by means of the collar 3 secured to the link 2, before described. The actuating shaft 4 is provided near its lower end with a circular shoulder 9, which fits into a corresponding recess in the needle bar 1, so that the actuating shaft 4 is held from moving vertically in relation to the needle bar 1 by means of the collar 5 at one end, and the shoulder '9 at the other end, but at the same time may be rotated.
The guide sleeve 8 is rotatably mounted in a suitable bearing 10, on the head J of the machine, and is held in position by means of cap 11, secured to the top of the sleeve, which bears upon the top of the bearing 10, and a flange or collar 12, also secured to the guide sleeve 8, which bears against the bottom of the bearing 10.
Rotatably mounted upon the lower portion of the guide sleeve 8 is an actuating sleeve 13, which is provided on the inside with three equally spaced vertical grooves 14, which are adapted to successively engage a short feather 15 situated on the guide sleeve 8, a short distance below the collar 12. The actuating sleeve 13 is provided with a series of holes 151, which are adapted to be engaged by the pins 16, of a segmental rack 17, secured to the link 2, by means of which the actuating sleeve 13 is oscillated and reciprocated as the hub D rotates. The segmental rack 17 is curved on the arc of a circle whose center is the point where the link 2 is pivoted to the collar 3, and is at such a distance above said center that one of the three grooves 1 1 will engage the feather 15 on the guide sleeve 8, every time the hub D rotates, and thus turn the actuating sleeve 13, the guide sleeve 8 and the actuating shaft 4 one third of a revolution. The actuating sleeve 13 is of such a length that it will not come in contact with the head of the machine when the link 2 has moved said sleeve to its highest position. The bottom of the actuating sleeve 13 preferably rests upon the top of the collar 3 and is preferably contracted near the bottom so as to form a suitable bearing surface around the needle bar. The guide sleeve 8 is of such length as A not to interfere with the reciprocation of the actuating sleeve 13 or the collar 3. The feather 15 is so located on the guide sleeve 8 that the grooves 14- are adapted to successively engage the same when the pivot point I guide sleeve 8 only a third of a revolution, the grooves 14 are made slightly wider than the feather 15, so that while a groove 14 passes over the lower end of the feather 15 when the link is passing upward from its extreme left hand position, it does not come in actual contact with the feather and turn the guide sleeve 8 until the groove 14 has passed upward for a short distance, at which point the groove 14, which has been rotated but a slight distance, comes into actual engagement with the feather 15 and turns the guide sleeve 8 a third of a revolution before the groove 14 leaves the same when the link 2 has reached its extreme right hand position. The groove 14 is also made wider than the feather 15 so as to insure the registering of the groove with the feather.
After the link 2 has reached its extreme right hand position, and the actuating shaft 4 has been rotated a third of a revolution, the needle bar 1 together with the actuating shaft 4 and the actuating sleeve 13, is moved to its extreme downward position and then up again until the pivot point of the link 2 on the hub D has again reached its extreme left hand position, at which point the next successive groove 14 is adapted to pass over the feather 15 so as to turn the guide sleeve 8, which actuates the actuating shaft 4, another third of a revolution. In this manner the actuating shaft 4 makes one complete revolution to every three revolutions of the hub D. To prevent the guide sleeve 8 from turning after a groove 14 of the actuating sleeve has turned the actuating shaft 4 a third of a revolution, and until the next succeeding groove 14 has inclosed the feather 15, a flat spring 18, secured tovthe head J, preferably is provided, which is adapted to successively engage three flat notches 19 on the cap 11, and hold the guide sleeve 8 and the actuating shaft 4 from rotating, until one of the grooves 14 of the actuating sleeve 13 again engages the feather 15; whereupon the spring 18 is pressed outward and engages the adjacent notch 19 and again retains the guide sleeve 8 and the actuating shaft 4 in position until the same are again operated by the actuating sleeve 13.
In the lower end of the actuating shaft 4 is preferably provided a cylindrical recess 20 in which is adjustably mounted a cylindrical block 21 by means of a set screw 22. The cylindrical block 21 is provided with an eccentric bearing 23 in which is ournaled a stud 24, secured to an actuating cam 25, the stud 24 being rotatably secured in the bearing 23 by suitable means such as a screw 26, the head of which engages the top of the cylindrical block 21. The bottom of the cylindrical block 21 is preferably provided with a flange 27, adapted to bear against the bottom of the actuating shaft 4.
The actuating cam 25 is provided with two depending lugs 28 which are spaced apart and adapted to support a needle holder 29 which is preferably pivoted to the lugs 28 by means of a pivot pin 30. The needle holder 29 is provided with a hole 30 in which the upper end of the needle 31 is secured by means of a suitable set screw 32. The needle 31 is set eccentrically to the actuating shaft 4 and also eccentrically to the stud 24 of the actuating cam 25. The actuating cam 25 is adapted to oscillate about a pin 33 in the needle bar 1 which engages a slot'34 in said actuating cam.
The throw of the needle 31 is regulated by the distance the actuating cam 25 is 'set off the center of the actuating shaft 4 and is further regulated by the distance the needle is set off the center of the actuating cam 25 and also by the position of the pin 33. If the needle 31 were set in the needle holder 29 so as to be in line with the center of the actuating cam 25, it would be found that the needle would in its three successive movements into the material make three stitches which would be equally spaced apart, so as to form an equilateral triangle, but in order to space the stitches at unequal distances apart, the needle is set in the needle holder 29 so as to be off the center of the actuating cam 25, which will permit the needle in its three successive movements into the material to space the stitches at unequal distances apart, so as to form a triangle the sides of which are of different lengths, depending upon the distance the needle is set off the center of the actuating cam. The relation of the three stitches to each other is also varied by the position of the pin 33 and its relation to the actuating cam 25, the throw of which can be varied in relation to the pin- 33 by turning the needle bar 1 which is accomplished by loosening the collar 3. As shown in the drawings, the needle is set at a greater distance off the center of the actuating cam 25 than'the actuating cam is set off the center of the actuating shaft 4. In this manner the needle can be adjusted to place two stitches off the hem fold and one on, the stitches off the hem being in line with each other while the stitch in the hem is preferably at right angles to one of the stitches made 011' the hem. The relative position of the needle in its three consecutive positions before entering the material is shown in Figs. 7, 8 and 9, below each of which is shown in Figs. 10, 11 and 12, the material 35 with the corresponding holes made by the needle which are marked respectively, a, b and 0. Below Figs. 10, 11 and 12, are Figs. 13, 14 and 15 which are views in cross section on the lines 1313; 1414 and 1515 respectively of Figs. 7 8 and 9, showing the relative position of the actuating cam 25 in its three successive positions.
The number of stitches to the inch or the distance between the holes a and b can be regulated by turning needle bar 1 as before described or by changing the position of the pin 33 on the end of the needle bar 1, additional holes 36 being provided for this purpose. In this manner the distance between the holes .7) and 0 can also be varied. In case it is desired to produce a fewer number of stitches to the inch, by increasing the distance between the holes a and b, the needle holder 29 is provided with an outwardly eX- tending arm 37, the top of which is provided with a cam surface 38 adapted to engage the end of the pin 33, which in such case extends below the bottom of the slot 34 for that purpose.
It will be seen by referring to Fig. 20 that the cam surface 38 is cut away so as to not engage the pin 33 when the needle is in position to place the first stitch off the hem, but when the needle moved forward by means of the actuating cam 25 to place the second stitch off the hem, as shown in Fig. 21, the needle is given an additional movement forward by the action of the pin 33 on the cam surface 38, which causes the needleholder 29 to turn on the pivot pin 36 that the needle will enter the material in advance of where it would otherwise enter. lVhen the actuating cam 25 has moved the needle back to its third'position to place the stitch on the hem the cam surface 38 will not en gage the pin 33, as the cut away portion of the cam surface 38 will be in approximately the same position as that shown in Fig. 20 for the first position of the needle. The needle holder 29 is held in normal position by means of a spring 39 in a recess 40 in the needle holder and adapted to bear against the bottom of the actuating cam 25.
The additional. throw of the needle can be varied by adjusting the position of the pin 33 so'that the same will extend to a greater or less distance below the bottom of the slot 34, or by varying the shape of the cam surface 38. The throw of the needle can also be adjusted to vary the number of stitches to the inch by inserting different cylindrical blocks 21, in which the bearing 21 is set more or less off the center of the actuating shaft 4. Different needle holders 29 may also be provided in which the needle may be inserted at various distances off the center of the actuating cam 25.
When the movements of the needle are regulated as above described, it will be seen that the material remains stationary during the three successive reciprocations of the needle and is fed forward only after the needle has entered the hem and it is necessary to repeat the succession of stitches; the material in each instance being fed forward a distance equal to the distance between the holes a and b, so that the needle will in its second downward movement to place the second stitch off the hem, enter the hole 0; of the preceding series of stitches, making a series of stitches as shown in Fig. 19.
A piercer 45 is provided which is secured to needle bar 1 in one of the holes 36, such piercer being adapted to puncture the ma terial off the hem fold at every descent of the needle.
Any suitable means for feeding the material may be employed, although in the present instance it is constructed as follows: The needle bar actuating shaft C has, it will be supposed, two cranks, which actuate like connecting rods 50 and 51, engaging respectively two cranks on the under shaft 52, provided at its front end with a gear 53 which meshes with a gear 54, secured to one end of a short shaft 55, near the middle of which is secured abeveled gear 56, which meshes with a gear 571, secured to a shaft 57 the rotation of which operates a suitable shuttle. Secured near the center of the under shaft 52 is a small gear 58 which meshes with a large gear 59 secured to a shaft 60. The gear 59 is rotated once for each three rotations of the shaft 52 and has connected to or forming part of it a cam 61 (as shown in Fig. 6), said cam having a cam groove 62,, in which enters a stud 63 which is secured to an arm 64, secured to one end of a short shaft 65 the other end of which is secured to a feed rocker 66, provided with a groove 67 in which enters a shoe or block 68 secured to one end of a lever 69, the other end of which is secured to an arm 70 which actuates the rock shaft 71. Secured to the rock shaft 71 is an arm 72 provided with a stud 73 which engages the rear end of a feed dog 74 which is adapted to engage the under side of and move the material. The lever 69 has pivoted to it the lower end a link 75, by which the lever 69 may be raised or lowered to vary the length of the stitch. The nearer the block 68 is to the center of oscillation of the shaft 65, the shorter the stitch. The shaft 60 has secured to its other end a cam 76 which operates an arm 77 secured to one end of a rock shaft 78 the other end of which is provided with an arm 79 which engages the forward end of the feed dog 74. It will be obvious that the feeding device may be so actuated that the same will feed the material forward once to every three revolutions of the needle bar actuating shaft.
lVhat I claim and desire to secure by Letters Patent is 1. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, an actuating shaft rotatably mounted therein, a guide sleeve, and an actuating sleeve connected to said actuating shaft, and an oscillating rack arranged to operate the same for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar.
2. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, an actuating shaft rotatably mounted therein, a guide sleeve, and an actuating sleeve connected to said actuating shaft, an oscillating rackarranged to operate the same for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar, and a needle holder eccentrically mounted on said actuating shaft.
3. A stitch forming mechanism comprising a reciprocating needle bar, an intermittently rotatable shaft therein, a needle holder eccentrically mounted on said shaft and arranged to produce a series of at least three stitches of unequal length one for each reciprocation of the needle bar, means for holding the material stationary until the series of stitches are completed, and means for feeding the material after the series of stitches have been produced.
4. Stitch forming mechanism comprising needle actuating means arranged to form three stitches of unequal length together forming a right angled triangle within a cycle of operations, and means for holding the work stationary in carrying out such cycle, and means for feeding the work at the conclusion of the cycle.
5. A stitch forming mechanism comprising a reciprocating needle bar, an actuating shaft therein, means for reciprocating said needle bar and said actuating shaft, means for rotating said actuating shaft a third of a revolution during a part of each reciprocation, an actuating cam eccentrically mounted on said actuating shaft, a needle holder mounted on said actuating cam eccentrically to said actuating shaft and ec centrically to said actuating cam, means for regulating the movements of said actuating cam to. form a series of three unequally spaced stitches, and means for feeding the material forward after each series stitches.
6. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder, and means for rotating said shaft intermittently, arranged to rotate same through complete rotations, and means for regulating the oscillations of said needle holder.
7. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, and means for oscillating said needle holder com prising a shaft carried by the needle bar and means for rotating the same through complete rotations, and means for regulating the oscillations of said needle holder.
8. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft mounted in and carried. by the needle bar and means for rotating the same through complete rotations, and means for regulating the oscillations of said needle holder.
9. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder and meansrfor rotating said shaft intermittently, and a fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
10. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder ary ranged to be reciprocated thereby, means for oscillating said needle holder comprising a shaft carried by the needle bar and means for rotating the same through complete rotations, and a fixed member secured to said needle bar and having a sliding connection with said needle holdenfor regulating the movements thereof.
11. A stitch forming mechanism for sewing machines comprising in combination a .reciprocating needle bar, a needle holder arcanged to be reciprocated thereby, means for oscillating said needle holder comprising a shaft mounted in and carried by the needle bar, and means for rotating the same through complete rotations, and a fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
12. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, means for oscillating said needle holder, said holder arranged to hold a needle eccentrically with respect to its axis of oscillation, and a fixed member secured to said needle bar having a sliding connection with said needle holder whereby the needle holder is given an oscillatory movement.
' 13. A stitch forming mechanism for sew ing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needlejholder, and
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means for rotating said shaft intermittently arranged to rotate same through complete rotations, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
14;. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft. carried by the needle bar and means for rotating the same through complete rotations, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection With said needle holder for regulating the movements thereof.
15. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder comprising a shaft mounted in and carried by the needle bar and means for rotating the same through complete rotations, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection With said needle holder for regulating the movements thereof.
16. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder arranged to be reciprocated thereby, and means for oscillating said needle holder, said holder arranged to hold a needle eccentrically With respect to its axis of oscillation, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
17. A stitch forming mechanism for se ing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated thereby, a rotatable shaft and means operated thereby arranged to oscillate said needle holder, and means for rotating said shaft intermittently, arranged to rotate same through complete rotations, and a pin secured to said needle bar and Working in a slot of said actuating cam for regulating the movements of said needle holder.
18. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated thereby, and means for oscillating said needle holder and said actuating cam comprising a shaft carried by the needle bar and means for rotating the same through complete rotations, and a pin secured to said needle bar and Working in a slot of said actuating cam for regulating the movements of said needle holder.
19. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocatcd by the needle bar said needle holder being pivoted to said cam, and means for oscillating said needle holder and said actuating cam comprising a shaft mounted in and carried by the needle bar, and means for rotating said shaft through complete rotations.
20. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a needle holder and an actuating cam arranged to be reciprocated by the needle bar said needle holder being pivoted to said cam, means for oscillating said needle holder and said actuating cam, said holder arranged to hold a needle eccentrically with respect to its axis of oscillation.
21. A stitch forming mechanism for seW- ing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, and needle holding means on said member and arranged to hold said needle eccentrically with respect to both said shaft and member.
522. A stitch forming mechanismfor sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically With respect to both said shaft and member, and means secured to said needle bar for regulating the movements of said needle holding means.
23. A stitch forming mechanism for seW- ing machines comprising in combination a reciprocating needle bar, a shaft'rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically with respect to both said shaft and member, and a fixed member secured to said needle bar and having a sliding connec tion With said needle holder for regulating the movements thereof.
24-. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically With respect to both said shaft and member, and an adjustably mounted fixed member secured to said needle bar and having a sliding connection with said needle holder for regulating the movements thereof.
25. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, a shaft rotatably mounted therein, means for rotating said shaft step by step as the needle bar reciprocates, a member eccentrically and rotatably mounted on said shaft, needle holding means on said member arranged to hold said needle eccentrically with respect to both said shaft and member and a pin secured to said needle bar and working in a slot of said member for regulating the movements of said needle holder.
26. A stitch forming mechanism for sewing machines comprising in combination a reciprocating needle bar, and a sleeve .surrounding the same, one of said members having a plurality of keyways and the other having a key adapted to move in such keyway, means for oscillating said sleeve back and forth and means for reciprocating said needle bar arranged to move same such distance that said key engages and disengages said keyways.
27. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means on said needle bar rotating in one direction only for oscillating said needle holder, andmeans for regulating the movements of said needle holder.
28. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means on said needle bar rotating in one direction only for oscillating said needle holder, and means secured to said needle bar for regulating the movements of said needle holder.
29. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means for oscillating said needle holder and means secured to said needle bar for regulating the oscillation of said needle holder, said means being also arranged to vary the throw of the needle holder on one of a series of movements.
30. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a needle holder pivotally connected to said needle bar and arranged to be reciprocated thereby, means for oscillating said needle holder, means for regulating the oscillations of said needle holder and means for varying the throw of the needle holder on one of a series of movements.
31. A stitch forming mechanism for sewing machines comprising a reciprocating needle bar, a shaft rotatably mounted therein, means for completely rotating said shaft step by step when the needle bar is in its upward position, a needle holder operated by said shaft and bar, and means for preventing rotation of the shaft during the lower portion of its travel.
32. A stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a shaft connected to said needle bar, means for intermittently rotating said shaft always in one direction, and a needle holder eccentrically mounted on said shaft.
33. A stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a shaft connected to said needle bar, means for intermittently rotating said shaft always in one direction, a needle holder pivotally connected to said needle bar and eccentrically mounted on said shaft and means for regulating the movements of said needle holding means.
34. A stitch forming mechanism for sew ing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operatively connecting said needle holder to said needle bar, intermittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of stitches.
35. A stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operativelv connecting said needle holder to said needle bar, inter mittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of at least three stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of at least three stitches.
36. A stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, a needle holder, means for operatively connecting said needle holder to said needle bar, intermittently rotating means for moving said needle holder angularly in relation to said needle bar to give a series of at least three unequally spaced stitches angularly related to each other, such means being arranged to operate while the material is stationary, and feeding means for moving the material after the formation of said series of at least three unequally spaced stitches.
87. A stitch forming mechanism for sewing machines comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted in said needle bar, means for rotating said actuating shaft a part of a revolution for every reciprocation of the needle bar, such means being arranged to rotate in one direction only, a needle holder, and means for eccentrically mounting said needle holder on said actuating shaft.
38. A stitch forming mechanism comprising a needle bar, means for reciprocating said. needle bar, a shaft mounted on said needle bar, means for intermittently rotating said shaftalways in the same direction, a needle holder, and means for eccentrically mounting said needle holder on said shaft so as to produce a series of stitches one for each reciprocation of the needle bar.
39. A stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, a shaft mounted on said needle bar, means for intermittently rotating said shaft always in the same direction, a needle holder, means for eccentrically mounting said needle holder on said shaft so as to produce a series of stitches one for each reciprocation of the needle bar, means for holding the material stationary, and means for feeding the material after the series of stitches have been produced.
40. A stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft and means comprising a rack for intermittently rotating in one direction said actuating shaft a portion of a revolution for each reciprocation of the needle bar.
4:1. A stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft, a guide sleeve connected to said actuating shaft, and means for rotating said guide sleeve a portion of arevolution for each reciprocation of the needle bar.
42. A stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a needle holder mounted on said actuating shaft, a guide sleeve and an actuatin sleeve connected to said actuating shaft and means for oscillating and reciprocating said actuating sleeve.
43. A stitch forming mechanism compris ing a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected to said actuating shaft, an actuating sleeve connected to said guide sleeve, and means for reciprocating and oscillating said actuating. sleeve and a needle holder mounted on said actuating shaft.
44. A. stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected tosaid actuating shaft, an actuating sleeve connected to said guide sleeve, and a rack connected to said reciprocating means for reciprocating and oscillating said actuating sleeve and a needle holder mounted on said actuating shaft.
45. A stitch forming mechanism comprising a needle bar, means for reciprocating said needle bar, an actuating shaft mounted on said needle bar, a guide sleeve connected to said actuating shaft, means for intermit tently rotating said guide sleeve and means for holding the guide sleeve in position When the same is not being rotated and a needle holder mounted on said actuating shaft.
In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.
JAMES LEATHEM. W'itnesses LEO J. MATTY, FRANK J. CRYSTAL.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
Washington. D. C.
US41415908A 1908-02-04 1908-02-04 Sewing-machine. Expired - Lifetime US1017426A (en)

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