US897553A - Sewing machinery. - Google Patents

Description

PATEN'i'ED SEPT. i, 1908;

0. J. 'PKLSSON. SEWING MACHINERY. APPLICATION III BD JAN.25, 1907.

8 SHEETS-SHEET 1.

I n ventor Witness w No. 897,553. 'PATENTED ,SEPT. 1,- 1908.

c; J. PiLssoN. SEWING MAOHINERY.

APPLIOATIOI IILED' JAN. 25, 1907.

8 SHEETS-SHEET 2.

" In ventol WWW Fw .No. 897,553. PATENTED SEPT. ,1, 190 c. J, PLLSSON. SEWING MACHINERY. APPLICATION FILED JAN. 26, 1907.

B SHEETS-SHEET 3- 12 wwwom 0 9 l 1 P E S D E T N E T N 0 S S L A P L C 5 1 7 9 8 m N SEWING MACHINERY.

APPLICATION FILED mas, 1907.

8 SHEETS-SHEET 4.

In M nior Witnesses PATENTED SEPT. 1, 1908. L'PALSSON.

SEWING MACHINERY.

APPLICATION FILED JAILZB, 1907.

s SHEETSSHEET-5.

Inventor 0 431411 -W 1'tne.ssc6

a anus-surf a.

PATENTED SEPT. l, 1908.

' [nvehtor N 0 S s. L A P u C SEWING MACHINERY A PPLIOATIOH FILED IA]. 26, 1901.

No. 897,553. PATENTED SEPT. 1, 1908.

I c. J. PliLsso SEWING MACHINERY.

APPLICATION FILED JAHJ25, 1907 v -Jl 77 ,1 r 11.3

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4" {fir 3 7/ 7:3 101 K :f 95" J3 I: 102 F- minim J m f 0. J. PALSS'ON. SEWING MACHINERY.

APPLICATION FILED JAN. 25, 1907. U

8 SHEETS-SHEET 8 wjjnewzs Ind/enter PiiiiBNTBD SEPT. 1, 1908f UNITED PATENT OFFICE.

CARL JOHAN PALSSQN, OF CHRISTIANIA, NORWAY, ASSIGNOR TO CARL GUNNAR ANDERSON,

OF GGTTENBORG, SWEDEN.

SEWING MACHINERY.

Specification of Letters Patent. Application filed January 25, 1907. Serial No. 353,984.

Patented Sept. 1, 1908.

To all whoin. it may conrer-n:

Be it known that l, am. Jo n.'\N PJiLssoN, a subjectof the King ol- Sweden, and resident of (hristiania, Norway, have invented new and useful lm irovcments in Sewing M achinery, of whic 1 the following is a specification, reference being had to the drawings ac- '.-ompanying and forming a part hereof.

This invention relates to n'nprovements in sewing m achinery.

The object of the invention is to provide a machine for stitching button holes or for plain stitching, as may be desired.

In carrying out my invention 1 make use of a machine having a stationary work-hold ing clam a stitching frame movable in relation to the table, means for moving the said stitching frame in such a manner as to cause the needle to move along the outline of a button-hole, and means for imparting to the needle-bar a lateral vibration adapted for side stitching. Such machines are before known but they are all adapted only for stitching button-holes and cannot be used for lain-stitching.

' 10 present in vent-ion consists, chiefly, in so arranging the frame-o cratin means and the means for vibrating t re need lmbarlaterally that they can be readily thrown out of operation, and, further, in making the workholding clamp easily (.letachable, the machine being, moreover, provided with means for feeding the work as in usual plain-stitching machines, so as to be easily convertible for plain-stitching, or for button-hole stitching, as may be desired.

The invention, further, consists in a novel arrangement of the movable stitching frame. As before stated, movable stitching frames are before known, but such frames were hitherto journaled in a. horizontally swinging crane or bracket inv such a manner as to be able to swing about a vertical axis therein. In such an arrangement it is of importance "to most accurately balance the frame, and

even in such case oblique Eres'sures cannot always be avoided by whic the pivots etc. will be irregularly worn neces'sitatmg adjustment and re air. Accordin to this invention, these rawbacks are 0 viated by the whole stitching frame being slidably su ported on the table so as to be carried irectl by the latter. By this means a practical y sulficient stability is obtained which 5'5 has hitherto not. been possible to obtain.

machine is to be used for plain stitching.

Fig. 2 is a side view of the mechanism foro erating the stitching frame and of the wori; holding clam and cutting device, the outlines of the irame and of the table being shown by dotted lines. Fig. 3 is a plan viewof the same. Fig. 4'is a bottom plan-view of theopcrating mechanism. Fig. 5 is a rear view of the operating mechanism. Fig. (S is a detail view of a cam-grooved disk serving to impart to the frame the aforesaid. motion causing the needle-bar to describe a .movement corresponding to the outline of the buttonhole. Fig. 7 is a detail view of the mechan ism for rotating the said cam-grooved disk. Fig. 8 is a rear view of the IIIGGl'HtII'lSIIlfOI throwing the machine out of operation. Fig. 9 is a side view of the said'latter mechanism. Fig. 10 is a side-view of the table and the stitching frame, parts thereof being removed in order to-show the operating mechanism and the connections between'the said mechanism and the stitching arts. Fig. 11 is a front view of the stitclnng frame, the fore protecting-plate being removed so as to uncover the stitchingparts inclosed within the head o'l' the stitching frame. Figs. 12 and 13 are cross-sectional views of the up er part of the hollow standard of the frame sl iowing the upper part of the lever actuating the rocking shaft of the machine and the means for throwing said lever into operative position (Fig. 1.3) or out of such position (Fig. 12).

Referring to the drawings, the frame 1 of the machine is slidably mountedon the table 2, the movement of the said frame being controlled by a mechanism secured to the underside of' the table, while the rear end of the frame is guided by a tongue or tailpiece 3 (Figs. 1 and .10) extending backward and provided with a slot 4 engaging a pivot 5 secured to the table.

In the embodiment illustrated, the mech-;.

longitudinal moven'ients t0 the frame 1 corresponding to the sides of the buttonhole, the said disk 6 is, on the under side, provided with a cam-groove 9, Fig. 4, which engages a pin 10, Fig. 5, attached to the end of an arm 11 iulcrumed on a pivot 12 fixed to the plate 8. The said arm 1] is rigidly fixed to the bottolncnd of a hub or sleeve 13 (Fig. to the upper end. of which. is ri idly hired another arm 14. The end. of t io latter has a pin 15, Figs. 3 and 4, which enga es a slot 16 ormed inv plate 17 secured to the "frame 1 with screws 18 (Fig. 5). The pin is mounted on a separate part 1.) which is secured to the arm 14 by means of a screw 20 engaging a slot 21 in the said arm 14 so as to allow of adjustment of the operatinqlengtb of the arm. 1 1 for different lengths o? huttonholes to be stitched.

In order to perform the transverse movement of the-frame 1 so as to shift the stitchin r needle from the one side of the button.- ho e to the other, after the former has been finished, the said disk 6 is, on the to side, provided with annthercain-grom'e ig. 6) which engages a pin 23 (Figs. 3, 4, and 5} attached to an arm 24 rigidly fixed to a sleeve, or hub, which is mounted on a pivot 26 secured to the base plate 8, the said hub being. provided with'an arm 27 having a pin. 28 en gaging a slot 29 in the aforesaid plate 17. For the adjustment of the transverse movcment of the frame 1. the pin 28 is mounted on a separate part 30 secured to the arm 27 by means of a screw 31 inserted through a slot 32 in the said. arm. The earn-groove 22 (Fig.

6) is composed of two semicircular parts and 3.4 corresponding to the movements of v the needle, along the sides of the buttonhole,

and of two parts 35 connecting the said semicircular parts and reducing the movements of the needle at t 1e button-hole ends. Obviously, the relative position of the camoovcs 9 and 22 must be such that the i-tierent movements of the needle during one revolution of the disk succeed each other.

Fig. 3 shows the position of the parts during the travel of the needle from the one s'ide of the buttonhole to the other.

The disk 6 is operated from the oscillating shaft 36 (Fi 's. 2, 3, 4, 5 and 10), and the mechanism ibr turning the said d k con-. sists, in the embodiment illustrated, of a plate 37 (Fig. 7) having the shape of a curved pawl, said plate having two pegs or knobs 38 engaging the flange or'rim 39 of a disk formed 13; an extension of the hub 40 of the disk 6.

c plate 37 is connected to a rod 4 1, and the latter is connected to an arm 42 (Figs. 4 and 5) secured to the shaft 36. The connection between the rod 41 and the arm 42 consists in the forked end. of the rod 41 loosely engaging a cross-pin inserted through the split end of the arm 42 so that the arm 42 operates the plate 37 only'when-pushing the rod 41 111 the irection of the arrow, Fig. 7. In order to pull the plate back again, I employ a coiled spring 43 attached to the plate 37 and to the base plate 8, Fig. 4. The positions of the knobs 38 in relation to the rim 39 are such that the knobs will firmly clamp the rim and cause the disk to turn, when the rod 41 acts, in the direction of the arrow (Fig. 7). on the end of the plate 37 connected thereto. When the arm 42 swings backward] y, the spring 43 turns the plate 37 with the knobs 38 in rela tion to the rim 39 so that the plate 37 can be pulled back by the spring 43, the knobs 38 30mg caused, during this backward movement of the late 37, to loosely glide along the sides 0r t 1e rim 39. In order to prevent the disk 6 from turnin backwardly with the plate 37 I provide a 'etent consisting of a clamp 44 mounted between pins from the base late 8 and provided with a recess having s anting sides 45 which are held against the sides of the rim 39 by a spring 46 in such a manner as to prevent t e backward turning of the disk but to offer no resistance against the turning of the disk in the direction of the arrow.

The work holding clamp (Figs. 2, 3 and 10) is detachably fastened to the table and held stationary with respect to the stitching meehanism. In the embodiment illustrated. it

consists of a plate 46 attached to a cross plate .95 47 resting on sup orts 48 secured to the table by nuts 49, the p ate 4.6 being, thereby, kept in such a position as to lie fiat on the top of the bottom plate of the frame of the ma chine. brackets 50 mounted on the topside of the cross plate 47 (Figs. 2 and 3) or directly on the plate 46 (Fig. 10) is a part 52 carrying the upper plate 53 of the work holding clamp. 54 is a spring pressing upon an extension of the plate 53 on the other side of the shaft 51v so as to press the toothed front end of the latter. against the cloth. In Figs. 2 and 3, the said extensioneonsists of aseparate part 55 screwed onto the top of the plate 53. order to raise the plate 53, when thecloth is to be inserted, or removed, 1 provide an cecentric cam 56 mounted on a shaft 57 journaled in bearings 58 on the plate 46. operating the cam 56 the shaftz57 is provided with a handle 59.

The device for cutting the button hole, after the stitching has been performed, may consist of a cutter 60 mounted at the end of a rod 61. said rod is, at its other end, j ournaled around a shaft 62 mounted in arms 63 on a shaft 64 journaled in brackets 65 on the cross plate 47. i For enabling the shaft 64t0 be turned it is provided with a handle 66. For guidin the cutter 60 during the cutting operatic provide, on the holding plate 53', a cam ada ted to engage a cam 68 on the knife" liol er 61,..the' latter cam 68 being adjustable for the purpose of enabling the length of the Carried by a shaft 51 journaled in 'For' In the embodiment illustrated the mechanism, suitably consisting of a hook 79, .Figs. H and 9, engagn'tg the driving cord.

Said hook is shown secured toashaft 71 journaled in a bracket 72 attached to the frame 1 of the machine. The shaft 71 has a crank 73, to which is connected a vertical 'post 74 passing down through an a e;rtnre inthe bot tom plate of the frame 1. The said post 74- is provided witha projection 75 engaging a plate'io during the stitel'iing operation, when the cord is running on. a fixed pulley 77, the

said projection 75 being held in engagement with the plate 76 by a spring 78. A coiled spring 79 is inserted on the said post 74, said spring bearing against thebottom plate of the frame of the machine and'agalnst the head of the post so as to exert an upward pressure on the post and raise the atter, when it is thrown out of engagement with the plate 76, thereby turning the-shaft 71 and the hook 79 so as to shift the driving cord from the fixed pulley 77 onto the loose pulley (the )osition of the parts as shown in -7 and 8). In order'to effect the automatic disengagement of the post and the plate 76 I provide an arm 89, the free end of which ongages the lower extremity of the post 74, said arm 89, Figs. 2, 3, 41 5. and 8, being attached to a sleeve or" hub 81 mounted on a pivot 82 fastened to the base late 8. the said hub-81. is anot 'er' arm 83 adapted to be engaged-by a knob 84 on thecircumference of the cam-grooved disk 6. In the .embodiment illustrated, the arms 89 and 83 both form parts of a single, strong wire attached to the hub 81. The arm 83 is held by a s iring 85 against the circumference of the dis 6. When the stitching of the buttonhole is finished, the knob 84 engages thear'm 83 and turns the arms 83 and 89, the latter throwing the post 74 out of engagement with the plate 76. The post is then raised, thereby turning the shaft 71 and the hook 70, which latter moves tha cord onto the loose pulleyf i t For the purpose of maintaining the engagement of the post 74 with the plate 76, when it is desired to perform a double stitching around the. button h le, I provide the said shaft 71 with an exte, sion, or handle 86, so as to be able to press down the post during the turning of the arm 80, whereby the engagement is continued until the next disengaging operation of the said arm.

The rocking'shaft 36 is driven from a rotary shaft 90 (Fig. 19) journaled centrally in the overhanging upper part of the stitching frame 1 and carrying the usual hand-wheel ink 95 can be raised or lowered.

Attached to 1 head of the frame.

about its pivot pin 195.

91 and the pulley 77 for transmitting motion from the main shaft of the machine to the said rotary shaft 99. The connection between the rotary shaft 99 and the rocking shaft 36 may be of any kind suitable for the purpose. In the embodiment illustrated in. Fig. 19 the shaft 99 has a cam 92 attached thereto, said cam being engaged by the up per, forked end of a lever 93 (see also Figs. 12 and 13) pivotally connected, at its lower end, to the end of a crank-arm secured to the rocking shaft.- (in Fig. '19 only the hub 94 of the said crank-arm is visible). The lever 93 is pivotally connected, at a point somewhat beneath the upper, forked end thereof, to the free end of a link 95 pivoted to the end of one arm of an angle-lever 96 journaled in the frame. The otherarm of the angle-lever 96 has a threaded hole adapted to rceeivea screw 97 inserted through a longitudinal slot 98 in the frame and having ahead adapted to tighten against the outer edge of the slot 98, when the screw 97 is screwed into the hole at the end of the angle-lever 96. By this means the angle-lever 96 can be secured in different 'IOSiblOIlS so that the centerofoseillation of the l When the center of oscillation of the link 95 is raised,

.(Fig. 13) the lever 93 is caused to move up and down during the lateral vibration imparted to it by the rotary cam 92, the shaft 36 being thereby 'caused to oscillate and move the frame. If, on the contrary, the center of oscillation of the link 95 is lowered, (Fig. 12) the lever 93 is caused to swing lat-- orally without moving up and down sufficiently to cause the shaft 36 to oscillate. 'l.hus,'the mechanism impm'ting to the frame its sliding motion can be thrown into or out of action by simply securing the angle-lever 96. in one or another position.

The shuttle-mechanisni (not shown) is at tached to a rocking shaft 99 driven from the rotaryshaft99byanysuitable means; in the embodiment illustrated, the shaft-99 is bent to a double crank 199 which is engaged by the head of a connecting rod- 101 pivotally connected, at its lower end, to the end of an arm 102 projecting from the rocking shaft 99. Referring to Fi 11, the needle-bar 193 is movably mounted in a carrier 1'94 pivoted, at itsupper end, about a pin 195 secured. to the The upand downward] reciprocating motion of the needle-bar193 is imparted thereto by a crank-disk 196 secured to the fore end of the rotary shaft 99, anda connecting rod 197 pivotally connected to the crank-disk and to the needle-bar.

The lateral vibration of the needle-bar 193 is obtained by causing the carrier 194 to swing To this end, the carrier 194 s'kept, by a spring 198, in contact with the lower end of a lever 199 pivotally-mounted at the outer side of the frame and carryi at its upper end, a roller .110

including-Ianeedle-bar 0f means.-adaptedyto--' I claim asnew actuated by a cam 111 securedt a rotary being kept in contact .with the cam 111 by the-spring 108 acting upon thecarrier. 4

Screwed into the sidewall of the head of the stitching frame is'a screw 114 the head of which can be made to bear on the lower arm of the lever 109. If the screw 114 is suflEiciently tightened against the lever 109,'the roller 110 is brought out of reach of the cam 111 so that no lateral vibration of the carrier 104 and needle-bar 103 will take place. By tightening the screw 114 securing the, lever 96 in a position in which the center of oscillation of the link 95 is the lowest possible, and removing the work-holding clamp, the machine ma thus, be used for plain stitching.

If desire the position of the frame 1 on the table can be secured by "means of two threaded bolts 87 inserted through slots 88 in the bottom plane of the frame and in' the table, said slots being long and wide enough to allow for the movements of the frame durin thestitchin ofbuttonholes. v

v aying now escribed my invention what desire to secure by Letters 1.- In a Sewing machine, the comma.

arrymg the. stitching mechanism along the. outline of a buttonl-hole, means adapted 'to impart to the needle-bar's. lateral vibration, means for throwing the frame-op erating means into, or out of operation, and

:means for throwing the needleebar-vibrating -move along the outline of a, button-hole, a

mechanism adapted to impart to the 'needlebar 1 a lateral vibration adapted for side stitchin a stationary workolding clamp detacha ly secured to the table, means for throwing the fram e-operating mechanism into or out of o eration, and means for throwing the needlear-v'ibrating mechanism into or out of operation, substantially as and for the purpose set forth; A

- 3. In a sewin machine, the combination of a table, a s'titc 'ng frame slidably mounted on the said table, a needle-bar carried by the said frame, a mechanism adapted to actuate the said frame bodily1 so as to impart thereto a motion causing t e needle-bar to move along the outline .of a button-hole, a mechanism adapted to impart to the needle-bar a lateral vibration ada ted for side stitchin stationary work-hol ing clamp detachai secured to the table, means for throwing the frame-operating mechanisminto or out of operation, and means for'throwing the need dbahvibrating'mechanism into or out of operatiemsubstantially as and for the. purposeiset forth.

v testimony whereof-I have signed my actuate saidjframe b0 ily so asto. impart to it mass to cause the needle bar to move Witnesses OSCAR DE 'Fnon,

CAR W. AsP.

ARL JoHAN' PALSSON

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