US 1727908 A
Description (OCR text may contain errors)
Sept. 10, 1929. M. M. SCHARF SEWING MACHINE Filed Feb. 4, 1927 8 Sheets-Sheet 1 Sept. 10, 1929. M. M. scHARF SEWING MACHINE Filed Feb. 4, 1927 8 Sheets-Sheet 2 ULULII l1HlHllIlHllllMlll llllllll Q Q Q INVENTOR flflfaSCf/fi/EF I i 477w 'Sept. 10, 1929. M. M. SCHARF 1,727,908
SEWING MACHINE Fil F 1927 8 Sheets-Shea, 3 m 15 120 12/ INV'EN T0,?
Sept. 10, 1-929. M. M. SCHARF 1,727,908
sswme momma Filed Feb. 4, 1927 8 Sheets-Sheet 4 I N VEN Tee Sept, 10, 1929. SCHARF 1,727,908
SEWING MACHINE Filed F 1927 8 Sheets-Sheet 6 IN VEN TOAE M M JC/M F PM a / Arflfg Sept. 10, 1929. Mr M. SCHARF 1,727,903
SEWING MACHINE Fil 1927 a Sheets-Sheet "I I/YVf/Y 70/ M M Same/- Sept. 10 1929. M. M. scHARF SEWING MACHINE Filed Feb. 4, 1927 8 Sheets-Sheet 8 I N VEN 70/ /%M 5CH4AF Patented Sept. 10, 1929.
UNITED STATES PATENT OFFICE.
Application filed February 4, 1927. Serial No. 165,980..
This invention. relates to improvements in sewing machines and more particularly to machines for sewing the fabric of an umbrella top to the ribs or tips of the umbrella frame structure.
The present invention is an improvement on the sewing machine as shown by my copending application, Serial No. 28,148, filed May 5, 1925, entitled Sewing machines, disclosing a machine for automatically sewing the fabric cover of an umbrella to the eye at the end of the umbrella rib, whichstitching operation heretofore had always been accomplished by hand.
Specifically, the present invention comprehends an improved and more efficient machine of this character and contemplates further a sewing machine for performing a series of stitching operations to stitch the fabric cover to an umbrella tip usually of celluloid, bakelite, or similar compositions, which after completion of the stitching operation is positioned on the usual metal umbrella rib.
It is, therefore, one of the objects of the present invention to provide a simple and practical sewing machine of the above general character, which will be so far as possible entirely automatic in its operation.
I A further object of this invention is to provide a machine of the above character which will automatically grip the fabric in proper position about the tip of an umbrella rib in predetermined relation to a reciprocating needle which stitches the cover to the umr brella' tip.
A further object of this invention is to provide a machine of the last mentioned character with suitable mechanism for reciprocating the needle at periodic intervals and tip and relatively. about the same in exactly the manner that the "stitching operation hasheretofore been performed by hand.
A further object is to provide a machine for automatically compensating the throw.
of the thread with respect to the amount of 'sociated fabric.
causing an actuated relation between the.
thread used whereby the thread will be drawn taut at each stitching operation.
A further object is to provide a mechanism of the above described character for severing the thread at the completion of the stitching operation.
A further object is to provide a simple and practical mechanism for automatically rethreading the needle prior to the start of a subsequent tipping operation.
A further object is to provide a practical mechanism for automaticallytensioning the thread carried by the needle thru and past the work during the successive stitching operations.
A further object is to provide a mechanism for automatically straightening the needle into rethreading position after the last stitch has been taken thru the umbrella tip and as- A further object is to provide a feed mechanism, which is substantially automatic in operation, to feed the umbrella tips to operative position in which position the needle may pass therethru to thus perform the necessary stitching operation.
A further object is to provide a drive for a machine of the above described character which is easily controlled by the operator.
A further object is to provide a machine of the above described character in which substantially all the mechanisms are operated by the rotation of a unitary member, one complete revolution of which completes the cycle of operation of said machine.
. A further object is to provide a machine of the above described character which is operative to sew the fabric of the umbrella top to the eye of the usual metal rib, as well as performing this stitching operation on an umbrella tip and fabric.
A further object is to provide a mechanism of the above general character having relatively few parts, which are unlikely to get out of order and which may be inexpensively manufactured, assembled and installed.
A further object is to provide a sewing machine of the last above mentioned character which may be easily operated, will be safe 100 to handle and which will not require operation by a skilled operator.
Other objects will be in part obvious from the annexed drawings. and in part indicated from the following analysis of this invention.
The invention accordingly consists in the features of construction, the combination of parts, and in the unique relation of the various members and the relative proportioning and dispositioning thereof, all as more clearly outlined herein.
In the drawings, wherein similar parts are designated by corresponding reference characters,
Fig.1 is a partialfront elevation of the machine, certain parts being broken away.
Fig. 2 is a partial rear elevation of the machine shown in Fig. 1, certain parts being broken away.
Fig. 3 is a side elevation of the frame and associated structure, the parts shown in Figs. 1 and 2 forming acontinuation thereof.
Fig. 4 is a side elevation partly in section of certain parts of the drive mechanisms.
Fig. 5 is an end view of the drive mechanism shown in Fig. 4, certain parts being removed.
Fig. 6' is .a substantial transverse view of that part of the machine shown in Fig' 1, certain parts being broken away.
Figs. 7 and 8 are details of the needle slide.
Fig. 9 is an end elevation of the work clamp actuating mechanism, having certain parts broken away.
Figs. 10 and 11 are details of the work clamp, Fig. 11 being a section along line 11-11 of Fig. 10.
Fig. 12 is an enlarged detail of the feed mechanism.
Fig. 13 is a section along lines 1313 of Fig. 1.
Fig. 14 is a detail of parts shown in Fig. 6.
Fig. 15 is a detail of the needle straightener.
Fig. 16 is a detail of the threader.
Fig. 17 is an end view of the thread cutter mechanism.
Fig. 18 is an elevation of the cam drum removed from its drive shaft with its cams mounted thereon.
Figs. 19 to 30 are face views, looking to the right, of the cams shown diagrammatically in Fig. 18, their relative directionof rotation being indicated by an arrow.
Fig. 31 is a detail of the fabric applied to and stitched to the tip after the completion of the last stitching operation.
Fig. 32 represents the reversal of the fabric relative to the tip for application to the metal rib.
Fig. 33 represents diagrammatically an attachment for sewing the fabric cover to the metal eye of the conventional umbrella.
v Referring to the drawings and more particularly to Figs. 1, 2 and 3, numeral 10 designates a cast pedestal having a base 11 suitably apertured for the reception of fioor bolts or other fastening means, and a table portion forming a support 12. Securely bolted to the support 12 is a block 13 which has its upper surface inclined. A U-shaped frame 14 engages said inclined surface and is securely fastened to the block 13 as by bolts or the like. By reason of the inclination of the engaging surface of block 13, the frame 14 is thrown relatively forwardly. and the parts contained therein are rendered more accessible to the operator. The main frame 14 comprises a casting having side portions 15 and 16 and is preferably provided with a guard at its relatively front portion (not shown).
Disposed between the side portions 14 and 15 and secured to the upper ends thereof, I provide a casting having an upstanding portion 18 and sidewardly extending legs 20. The central portion of the casting is cut away asat 21 for the purpose hereinafter described. It will be understood that the gen eral structure above described may be varied as desired.
Numeral 22 (Figs. 7 and 8) designates oppositely disposed gibs, secured to casting 18,
mechanisms are substantially identical the left hand needle slide and Winner will be described and reference will be had to the other mechanism only when necessary to a clear understanding of the invention.
The needle gripping mechanism comprises a lower jaw 27 fixed to and extending laterally from the block 25 as by screws 28 and has an upstanding boss 30 which is straddled by an upper jaw member 31. A pin 32 ex tends thru boss 30 and jaw member 31 whereby relative pivotal movement therebetween is assured. The lower jaw 27 is suitably counter-sunk and apertured as at 33 for the admission of a needle which is also engaged by a complemental gripping surface 34 of the upper jaw. Pivotallyjoined to the free end of the upper aw by means of a pin 35 is arm 36, the said arm having a nose portion 37 normally engaging the lower jaw thru the medium of a snrinrr 38. Under the action of this spring, the jaws are maintained in gripping relation until ihe free end of arm 36 is positively actuated downwardly.
The gripping mechanism as above described, has reciprocatory movement by virtue of the mounting of slide blocks in gibs 22. Such movement is effected in the following manner. An arm is fulcrumed as at 41 to block 25 and is pivotally secured to a bell crank lever having spaced, angularly disposed arms 43 and 44 and intermediate portion 45, said portion 45 being journaled in a saddle member 46 fixed to casting 18. The arm 44 has a pivotal connection with rock lever 47 thru link 48, the length of which may be adjusted as desired. The said rock lever 48 extends downwardly and terminates in side ears 50, 51 and has a stub shaft 52 mounted therein and disposed intermediate said ears. (See Fig. 13.)
I provide a cross member 53 having side arms 54 pivotally joined to ears 50, 51 thru links 55 and having front and rear arms 56 corresponding in length to stud shaft 52. The arms 56 and shaft 52 are suitably bored for the reception of fastening bolts 57 which extend from auxiliary housings 58 formed in casting 18. At the bottom of links 55, I provide roller supports 60 in which are mounted cam rollers 61, 62 adapted to engage cam rings C and E respectively mounted on a cam drum 63. Altho to be later described in detail, it will be here stated that as the cam rollers 61, 62 engage cam lobes on their respective cam rings, rocker arm 47 is pivotally actuated about its point of support (stub shaft 52) and results, thru actuation of link 48, bell crank lever 45 and link 40, in reciprocatory travel of slide block 25 and associated gripping mechanism. By means of the mounting of the cross member 53 and its association with ears 50, 51 of rock lever 47, whipping or lash of said arm 47 during its actuation is prevented.
The needle gripping and slide mechanism shown at the right (Fig. 1) forms with the left side mechanism a transfer unit substantially identical to the left side needle mechanism above described excepting that its cam rollers 61, 62, engage the cam rings K and .J, the cam lobes or tracks of which are substantially similar to those of camrings C and E, but are positioned to effect a differenttime element of actuation.
Mechanism is provided to render the needle gripping mechanisms, which are normally maintained in gripping relation, operative for transfer of a needle from one to the other mechanism when the needle slides are brought to a predetermined transfer position. The mechanism for engaging with the left slide and gripping device for releasing the needle comprises a casting member 65 (Fig. 6)
bolted or otherwise secured to member 18 and having spaced ears 66 in which pin 67 is fixed. Mounted onsaid pin is a rock member 68 having a finger 70 extending forwardly over the casting 18 and in the path of travel of the spring pressed lever 35 of the. left gripping mechanism, and an arm 71 extending rearwardly thereof. The said arm 71 is pivotally joined in a bifurcated clevis 72 in which a rod 73 terminates. The rod 73 at its lower end is joined to arm 74 which is mounted for arcuate travel from shaft 75, which extends between side portions 15, 16 of the cast frame 14. Arm 74 is provided with a cam roller 76 adapted for engagement with cam ring B on drum 63, which is provided with cam lobes causing rod 73 to be raised and finger 70 to be lowered. The lowered finger positively depresses the spring held arm 36 of the needle gripping mechanism when the latter during its travel is projected beneath the same and release of the needle held between the gripping surfaces 33, 34 of jaws 27, 31 respectively is permitted. The needle release of the right gripping mechanism is effected by substantially identical structure properly posi-.
tioned with respect thereto excepting that its cam roller 7 6 engages cam ring L. It is obvious that the operation and actuation of the needle gripping and transfer mechanisms as well as the gripping release mechanisms, result by reason of the engagement of the respective-cam rollers with their cam rings and is made possible by rotation of the cam drum 63. Certain of the mechanisms described hereinafter depend upon the application of power to the drum whereby the drum is rotated for their actuation, and I shall now describe the power application and drive means.
The drum 63 consists of a machined hollow cylinder having a plurality of cam rings A, B, C, D, E, F, G, H, I, J, K and L (Figs. 18 to 30) positioned therein, and its end portions provided with spiders (not shown) thru which a shaft 81 extends and is fixed thereto by suitable means. The said shaft is journaled in sides 15, 16 of the frame 14 and extends beyond one side thereof (Figs. 3, 4 and 5). A gear wheel 82 is fixed to said extension and meshes with worm, 83 keyed or otherwise fixed to a stub shaft 84. The
said shaft 84 is journaled in worm box 85,
and a'depending arm of casting 86, both of which are securely bolted to casting 14 as by bolts 87, 88 respectively. A pulley 90 is mounted and runs freely on shaft 84 and has a cone clutch surface 91 and a belt groove 92 therein. A belt 93 runs in groove 92 from a pulley 94 driven by motor 95, the said motor being mounted upon a bracket 96 fixed to pedestal 10. Positioned adjacent to pulley 90 on shaft 84 I provide a clutch member-97 havin a clutch surface 98 complemental to and adapted to engage the clutch surface 91 of pulley 90 by reason of spring 99 mounted on shaft 84, and operative between said member 97 and a fixed collar 99. The said clutch member 97 is keyed to but axially movable on shaft 84 by reason of pin 100 extending thru shaft 84 and engaging in slot 101 in the reduced end thereof. The clutch member 97 has secured thereto as by bolts 102 a brake drum 103, and is which a key 105 extends.
provided with an annular channel 104 in The spring 99 normally urges the clutch member 97 into engagement with pulley thru clutch surfaces 98 and 91 respectively, and the shaft 84 is thus resultingly driven from motor 95 causing the rotation of gear wheel 82 and cam drum 63, unless the clutch member 97 is forced relatively to the left by movement in that direction of the key engaging in channel 104 thereof.
I propose to place the actuation of the clutch above described within the control of the operator. To this end, there is provided a forwardly extending boss 106 at the base of pedestal 10 in which is fulcrumed a foot lever 106, the said foot lever having an arm 107 which is pivotally connected to link 108. A shaft 109 is mounted in frame 14 and carries a bell crank lever 110 housed within the frame structure and joined to link 108, the said bell crank lever having an arm 111 which extends outwardly and at the right side. The said arm is operatively connected to rod or link 112 which extends upwardly and is guided in the bifurcated end 113 of a lever 114 which is mounted for arcuate travel from stub shaft 52 in housing 58. Fixed on rod 112 is a collar 115 which, upon upward actuation, engages bifurcated end 113 of lever 114 and causes the same to be swung upwardly.
I secure a strap 118 to lever'114 which extends upwardly therefrom and is pinned to lever mounted from and fixed to a'free shaft 121, the said shaft being journaled in brackets 119 from the side frames 20. At its free swinging end, lever 120 is provided with a slightly rounded nose portion 122, which when raised, engages finger 123 having a slight recess therein and fixed to U-shaped operating lever 124, the said lever being mounted on sides 15, 16 of main frame 14 and urged in a direction to obstruct upward movement of lever 120 by a spring 124'. Finger 123 in its normal position thus acts as a stop for the upward actuation of strap 118 resulting from actuation of foot lever 106, andoperating lever 124 must therefore be swung outwardly (relatively to left Fig. 3) to permit actuation of the foot lever. When such actuation of the foot lever has been effected and operating lever 124 has been pulled outwardly and subsequently released, finger 123 engages nose portion 122 of lever 120 in Fig. 3 to maintain the same in raised position and rod 112 drops back to its initial position. Swinging movement of lever 120 causes rotation of the shaft 121 for a purpose tobe later-described.
There is also provided a finger 125 fixed on rod 112 which, as said rod is raised upwardly, engages a latch 126-pivoted by pin 127 to arm 128. The said arm is swingingly mounted from a stud 130 mounted in ears 131 of the casting 86. Swingingly mounted on pin 130 adjacent to lever 128 is positioned an arm 132 having a notched portion 133 in which latch 126 normally rests. The lever 128 normally engages an arm 135 forming part of bell crank lever including boss portion 136 mounted for rotation in brackets 137 fixed to casting 86 and frame 14 and rearwardly projecting lip portions 138. In said lip portions is pinned a rod 140 having an enlargement 141 at its other end from which key 105 depends, which key, as hereinbefore stated, engages in annular channel 104 of the clutch member 97.
Actuation of operating handle 124 to the left (Fig. 3) to permit movement of rod 112 upwardly upon the operation of foot lever 106 causes the fixed finger 125 to engage latch 126 and trip said latch against the action of spring 142, and the part 128 being new disengaged from .member 132. may swing freely on stud 130 and independently of member 132. Arm 135 is then free to respond to urge of spring 99 and swings to the left, Fig. 5; the rod 140 with its key 105 is projected axially to the right permitting operative driving engagement between the complemental clutch surfaces 91 and 98 of pulley 90 and clutch member 97 respectively. Vvheh the latch 126 is tripped as above described, mcmber 132 swings a slight distance to the left by reason of the disposition of its weight, and the latch, under the action of spring 142, again seats itself in notch, 133.
Adjacent the brake drum 103, there is provided a friction block 143 hung from a bell crank lever 144 mounted from casting 86 by pin 145. The other end of the bell crank lever has a pivotal connection as at 146 with arm 147 having a nose 148 adapted for engagement with the enlarged end 141 of rod 140 from which key 105 depends. Member 7 147 is provided with an adjustable screw 149 whereby bell crank lever 144 and friction block 143 carried thereby may be adjusted with relation to brake drum 103. Thus as rod 140 permits the clutch member 97 to move to the right, the friction block 143 assumes a non-braking relation with respect to brake 1 drum 103, and movement of rod 140 to the left causes member 147 to swing about its fulcrum 146 to throw friction block 143 into braking engagement with said brake drum 103.
Itwill be understood that the motor 95 runs continuously and acts to drive the cam drum 63 only after both foot lever 106 and operatingdev'er 124 are actuated by the operator.
As will be brought out hereinafter, the complete cycle of operation comprises a single rotation of cam drum 63. I provide stop means whereby disengagement of the clutch members is effected upon one complete ro-' tation of the cam drum. This mechanism is as follows. On the relatively outer face of worm wheel 82, I provide a single cam lobe 150 adapted to be engaged by an inwardly directed portion 151 of lever 132. The cam lobe 150 is so positioned that upon the completion of one rotation of the cam drum 63, the said cam lobe engages camming portion 151 which is in its relatively inward position and causes the same to be swung out- -wardly.
Arm 132 is likewise carried outwardly, the latch 126 acting as a rigid link between members 128, 132 and forcing arm 128 relatively outwardly to engage arm 135 and to swing the same relatively outwardly and cause rod 140 to move to the left to effect disengagement of clutch member 97 from its complemental clutch member 90. This movement acts to bring friction block 143 into engagement with brake drum 103.
A stop mechanism actuated from the cam drum is also provided and comprises a downwardly projecting arm 152 fixed on lever 114 which carries a cam roller 153. The said cam roller is adapted to engage with cam lobe 154 of cam ring K mounted on cam drum 63 and which is so positioned that its engagement with cam roller 153 just prior to the completion of a single cycle of rotation of the drum 63 causes the nose portion 122 of lever 120 to be jarred from its recess in finger 123, and the lever 114 to be lowered. This move: ment disengages lever 120 from operating lever 124 and permits the latter to be swung backwardly in response to the urge of its spring 124 for the next starting operation. Cam lobe 154 is arranged to actuate its associated stop mechanism in a time relation slightly in advance of the clutch disengaging means actuated by cam lobe 150.
When the operator starts the device, the cam drum 63 is rotated to cause the needle slide blocks 25 to carry the needle grippers towards and from each other. When the needle slides are at the end of their forward nism is timed to be actuated by the position-' ing of the individual cams of said mechanism. By reference to Figs. 21, 23, 28 and 29, the cam rings C and- E when rotated cause actuation of the left slide (Fig. 1), while cam rings K and J cause similar travel of the right side mechanism. Considering the said cams to be actuated in a clockwise direction and the cam rollers being indicated in their position to start the cycle of operation, roller 61 of the left slide mechanism engages the lowermost cam surface (0) of cam ring C while roller 62 engages cam lobe (e of cam ring E. Rollers 61 and 62 of the right. hand slide are simultaneously engaging cam surfaces (lc of the cam ring K and lobe (j) of cam ring J. In this position of the cam rings and cam drum, the left needle slide (Fig. 1) is at the end of its back stroke ready to commence its first forward stroke, and the right side needle slide is in a position slightly removed from the end of its forward stroke.
Rotation of the cam drum 63 causes roller 61 to ride onto the came lobe (0 While the roller 62 rides into the depression (6); the arm 47 is swung inwardly and the left side slide is projected thru its first forward stroke. The right side slide has been simultaneously projected to the full amount of its forward stroke by reason of cam roller 61 riding on came lobe ([0 and cam roller 62 being lowered into depression j respectively. In this relation of slides, the transfer of the needle is effected by reason of operation of the needle release. With reference to Figs. 20 and 30, rotation of drum 63 causes the cam roller 76 of the left side gripper to ride cam lobe (b and depresses finger to engage arm 36 (Fig. 7) to release the needle as the needle slide reaches the end of its forward stroke. The cam roller 76 has been simultaneously engaging the lobe (1) to hold the right side slide open for the receptionpf the needle. As the cam rollers 61 and 62' engage cam surfaces (7c) and (j) respectively to project said right side slide on its back stroke upon further rotation of the cam drum 63, the gripper release roller 7 6 engages depression (Z) of cam ring L, which permits the right slide mechanism to grip and carry the needle on its back stroke. The right slide then reverses its direction of travel as governed by cam lobes (70 (j), and the needle is released by cam lobe (Z The left side mechanism which has remained stationary during the travel of the right slide and its gripper maintained released, then grips the needle which is transferred to it by engagement of its release cam surface b and is projected on its back stroke as determined by cam lobes (0) (6 It will be seen that there are six forward strokes and six reverse strokes of the left side slide as determined by cam lobes (0 to (0") and (e) to (6") of cam rings C and E; whereas there are seven reverse strokes and seven forward strokes of the' right side slide as determined by cam lobes (1' to (j) and (7a)) to (72 of cam rings J and K counting as strokes the partial forward stroke and the partial reverse stroke taking place at the beginning and end of the cycle and as governed by the cam lobes '(j) and (70 During the travel of the slides, they are brought adjacent to each other or in transfer position six times.
The left and right side needle releases are, of course, accordingly operated six times by cam lobes (6 to (6") and (Z to (L of cam rings B and L to effect the needle release alternately from one slide and gripping mechanism to the other. It will be understood that the number of needle transfers is arbitrary, and I am not to be limited to the six transfers described, as any desired number of transfers may be effected to obtain a desired number of stitches.
The work is held in suitable work clamps positioned intermediate the needle slides. .It will be understood that the device carries suitable thread which extends thru the eye of the needle and is passed thru the work by a series of transfers of the needle in the same direction. The thread is wrapped about the work to form a loop stitch during a reverse series of transfers by reason of the reciprocation of a work holding clamp in a path normal to, in, and out of the reciprocatory path of the needle. The work holding device comprises a fabric holder and a tip or rib holder, the said fabric holder being formed of spring leaves fixed to block 161 formed on rod 162, the spring leaves 160 being normally (when the machine is not in operation) positioned as shown in Fig. 9. The said rod 162 is mounted for axial movement in arm 163 of casting 164, which has forwardy extending bracket portions or cars 165 formed thereon. The ears 165 are suitably bored for the reception of a rod 166 which is fixed to the lower ear as by bolt 167. Mounted on casting member 18 as by bolts 168, I provide a rearwardly extending bracket 17 0 having ears 171 thru which rod 166 extends.
Casting 164 has a base portion 172 which is engaged by the end of arm 173 mounted from shaft 75. The said arm 173 is provided with ears 174 in which is mounted a cam roller 175 which engages lobes of cam ring H'(Fig. 26) mounted on the cam drum 63.
Connecting links 176, 177 are mounted from base 161 of spring leaves 160 and from arm 163 of casting 164 respectively, and have a connection with link 178. The said link 178 is in turn pivotally oined to arm 180 fixed to shaft 121. Thus, as the operator presses foot lever 106 to raise rod 112 and thereby cause rotation of shaft 121, arm 180 is pulled from the position shown in Fig. 9 to the right, and the links 176, 177, acting as lazy tongs, project the fabric clamp upwardly into operative working position.
By reason of engagement of roller 175 with lobes of cam ring H, the frame 164 is alternately raised and lowered against the action of spring 182 on rod 166, which engages ear 171 of bracket 170 and collar 183. fixed to said rod. The actuation of frame 164 and resulting actuation of the fabric clamps 160 is inde endent of said first upward raising of said fa ric clamps caused by rotation of shaft 121.
The arm 163 has an extension 184 projecting upwardly therefrom which is provided with a top boss portion 185 and an intermediate boss portion 186. Screw threaded in boss 185 so that it may be removed therefrom is a threading pin 187 which extends forwardly therefrom. comprising crossed clamping arms 188, the
said arms having gripping faces 190, arepivotally secured to the boss 186 as by a stud 191. The clamping arms are normally maintained in gripping relation by a spring 192 extending therebetween. It will be seen that the threading pin 187 extends between the clamping surfaces 190 of the clamp arms 188, and a tipis threaded thereon as hereinafter to be described.
To permit the operator to separate the said clamp arms, I provide pins 193 extending rearwardly therefrom adjacent fingers 194 which depend from a bushing 195, the said bushing extending across extension member 184 and rotatable about stub staft 196 fixed therein. An arm 197 extends from said bushing and terminates in an enlarged end 198. WVhen it is desired to separate clamping arms 188, the operator presses end 198 of arm 197 which causes fingers 194 to engage pins 193 on the said clamping arms and force their gripping surfaces away from one another against the urge of spring 192.
Fabric clamps 160 are provided with an elongated slot 200 of sufficient depth to permit the needle during transfer from the left slide mechanism to the right slide mechanism to pass thru the eye of the umbrella tip (shown in dotted lines, Fig. 10) and to permit a return transfer of the needle to said left needle slide below and above the umbrella tip and associated fabric held in said clamp.
The cam ring H is provided with a plurality of cam lobes.(h), (71. (if), (k (72. (72. (h which when engaged by cam roller 17 5, cause the tip and fabric clamps to be raised [lobes (7L1), (h (h and to be lowered (h, if, h) from the normal position (it) in which a needle passes thru the eye of the tip.
Considering now the mechanism which permits of a substantially automatic feed of umbrella tips to the clamp arms 188 and with reference to Fig. 12, there is provided a frame structure comprising a leg 202 secured to the top of casting 18 as by screws 203, and an inclined chute member 204 having at its upper end a shoulder 205. Pivotally anchored in said shoulder, is a rod 206 upon whicha plurality of tips 207 are threaded and which extends beyond the lower end of the chute 204. Adjacent this lower end, I pivotally secure as at 208 a substantially L- shaped member 210 having a spring 211 secured to its upstanding leg whereby thesaid member 210 is held in the relation shown.
Tip or rib clamps end contacts with finger 212.
The upstanding leg is also provided with finger 212 having a pointed end 213, and the other leg is provided with an extension 214; which straddles the end of rod 206 and normally acts as a stop for the tips threaded thereon. The pointedend 213 of the finger 212 is spaced from the extension 21 1- a distance approximating the diameter of anombrella tip.
Mounted on the casting 18 is an upwardly extending arm 215 at the top of which a rock arm 216 is journaled. One end of said rock arm engages presser arm,197 and the other A bent rod 217 is mounted in bracket 218 fixed on casting 18, and is axially movable with respect thereto. A fixed collar 220 limits the axial move- 'ment to the right of said rod 217 which is urged to the left by means of spring 221. At the other end of the rod 217, there is provided a reduced portion 222 adapted to be inserted in eye 223 of the umbrella tip. The arm 217 is permitted a swinging movement about its mounting in bracket 218 throughout an arc of 180 degrees as indicated in dotted lines. The operation of the feed mechanism is as follows. Actuation of arm 197 to open clamp arms 188 by the operator causes the rock member 216 to swing about its mounting in arm 215. The free end of said rock arm engages finger 212 and causes the L-shaped member 210 to swin about its fulcrum 208' against the action of spring 211. This actuation causes the pointed end 213 of finger 212 to be depressed between the last two of the tips threaded on rod 206. The L-shaped member carries, with it its extension 214 which permits the lowermost tip to slide from rod 206 and to be threaded on reduced end 222 of the rod 217. The operator grasps the end of the tip and causes the rod 217 to swing into the dotted lines shown, in which position the tip is threaded on to pin 187 and extends in its desired position between clamp arms 188 to permit ofthe passage of the.
needle thru the aperture 223 thereof. The rod 217 may then be pushed to the right against the action of spring 212 and is returned to its initial poisiton. During such operation, pointed end 213 serves as a stop and prevents sliding of the tips threaded on rod 206. Release of lever 197 causes the clamp arms 188 to firmly grip the umbrella tip by reason of spring 192 and also releases the rock member 216 which permits the L- shaped member 210 to swing back into its initial position by action of spring 211.
Thread 225 is supplied to the needle from a suitable source of supply as a spool, not shown. An arm 226 fixed on saddle member 46 is suitably bored and acts as a guide for the thread, which then extends thru a tension device 227 to the lower portion of rod 228. By reference to Fig. 16, the said lower portion of rod 228 is substantially U-shaped and has downwardly extending legs,- the longer of which has a guide channel 230 therein and the shorter having an aperture 231. The thread is guided in said aperture and extends across said U-shaped portion thru channel 230 therein and from thence extends thru the eye of needle 232. This needle is of the type shown in my prior application and is pointed at both its ends having its eye disposed intermediate its pointed ends. will be understood that a single pointed needle might be used, but such use is hardly desirable as requiring separate forms of needle grippers.
The free end of this thread is normally (during the transfer operations) held against the lower gib 22 by an arm 233. The said arm is pivoted as at 234 from a lug 235 extending from casting 18. A stud 236 likewise extends from said casting and projects thru spring arm 233. Fixed to said spring arm 233 is a dependingarm237 which extends downwardly and at its lower end engages a lobe (d) on cam ring D mounted on drum 63. The spring arm 233 is pressed into tight engagement with gib 22 when determined by relation of cam lobe (cl) and arm 237 to maintain fixed the free end of the thread as the needle is being caried forward on the first forward stroke of the left side needle slide, thru the eye 223 of the tip 207 held in the work clamp and as sociated fabric, and the first reverse stroke of the right side needle slide to permit the thread necessary for the complete cycle of stitches to be pulled from the thread source and thru the tension device 227. At other times. except when hereinafter indicated, a spring pressure is exercised on the free thread end by reason of spring 238 on a stud 236 urging arms 233 and 237 against the gib 22. The length of the thread pulled from the supply must be such as to permit the subsequent stitching operations to be taken and the needle carrying the thread to be returned partially to the fully retracted position of the left side needle slide after the work has been completely stitched.
To compensate for the decreasing length of the thread carried by the needle as succes sive stitches are taken thru the work, I propose to progressively decrease the operative radii of the cam lobes of cam'rings C, E of the left side needle slide and similarly of the lobes on cam rings J, K of the right side needle slide. The actuation of both slides is thereby lessened after each needle transfer, and their travel is succesisvely decreased as the-thread is passed thru and about the work by successive stitches.
It has been found that a loose loop of thread carried by the needle results by reason of the reversal of actuation of both needle slides at the ends of their back strokes to commence their forward strokes. To eliminate the possibility of this loop of thread being engaged by moving parts and thereby broken and to keep taut the thread at all times, I provide mechanism at each side of the work clamp to engage and tension the said thread and thread loops. Each mechanism comprises (as shown in Figs. 2 and 6) a finger 240 extending from a rod 241 rotatably mounted in a lug 242 formed integrally with casting 18 and in latter. Rod 241 and its continued camming portion 244- form in effect a rock shaft, the actuation of which causes finger 240 to swing about the axis of rods 241. 246 is a spring having one end fixed to the rod'24l and its other end fixed in lug 242, the said spring serving to urge thefinger 240 intotensioning relation to the thread, or tothe left of its full line position (Fig. 6). It will be understood that two such fingers 240 are provided each of which are adapted to be operated upon actuation of arms 47of the left and right side needle slides.
When both or either of the needle slides are adjacent the ends of their forward strokes or are beginning their back strokes, fingers 245 engagecamming portions 244, and cause fingers 240 to be retracted against spring 246 into the full line position (Fig. 6). \Vhen either needle slide carrying the needle and thread is actuated by movement of lever 47 on its reverse stroke, fingers 245 will ride off camming portions 244,'and fingers 240 are swung relatively forwardly about the axis of rod 241. The fingers 240 so actuated then engage the thread carried by the needle from the work by either needle slide to tension the same and to take up the loose loop of the thread occurring when the slide carrying the needle begins on its back stroke and is reversed in its stroke. The thread forms tight stitches by reason of this tensioning feature.
The needle is adapted to be automatically rethreaded by a threader member which operatesin. conjunction with the thread carrying arm 228 hereinbefore described. The said rod 228 is rotatably mounted ina bushing 250 which is cast integrally with an extension 251 of casting 65 of the left side needle gripper release. Said extension is provided with ears 252 in which is mounted bell crank lever 253.
One arm of said bell crank lever has a slot and a pin connection with the rod 228 as at 254,
pin 260 which engages in a slot 261 of substantially helical form formed in bushing 250. As cam roller 258 engages the lobe (a) of cam ring A, link 256 is raised and bell crank lever 253 is swung about its mounting in the ears 252 and causes rod 228 to be projected downwardly. By virtue of pin 260 operating in slot 261, this downward movement of rod 228 results in rotation of the rod 228. which is permitted by reason of slot and pin connection 254. The thread guided in aperture 231 and extending thru channel 230 of rod 228 is turned with said rod and extends directly across the eye of the needle. It will be understood that the rotation of rod 228 just described takes place at the end of the last reverse stroke of the left side needle mechanism while cam rollers 61 and 62 thereof are riding on cam lobes or surfaces (0) and (6 of cam rings C and E respectively.
A threader arm 262 (Fig. 2) is mounted for swinging movement as at 263 in an extension 264 of casting 18. At its free end said threader arm carries a threader hook 265. Adjacent said threader hook and pivotally connected to lever 262 is a downwardly extending link 266, the said link having a pivotal conne:.tion with the lever 267 which is'mounted on stub shaft 52. Intermediate the ends of said lever 267, I provide a roller 268 adapted to engage lobe (z') of cam ring I mounted on cam drum 63. Then such engagement occurs, lever arm 267 is swung about its fulcrumed end, and thru link 266 causes arm 262 carrying with it the threader hook 265 to be raised. The threader hook is so positioned that upward actuation there of causes the same to be projected thru the eye of the needle a sufficient degree to engage and hook about the thread which, by reason of the lowering and turning of the rod 228, is positioned transversely across the eye of the needle and directly above the same. When roller 268 rides off the cam lobe lever 262 is urged by a spring 269 to its normal position, and the thread hook carries With it the thread which extends thru the needle eye to the work as indicated at 225 (Fig. 1).
As hereinbefore indicated, the arm 233 is normally spring pressed against one of the gibs 22. When the threader arm is raised, however, it abuts against said arm 233 and forces same outwardly to release the loose end of thread 225 held therein. Lowering of the threader arm brings the thread indicated at 225 downwardly as shown at 225", and causes arm 233 to spring back against the gib 22 to frictionally retain the one end of the thread (that end leading to the work) which has been broken as will be later described. In its extreme retracted or down position,
threader hook 265 pulls said free end from betivcly long free length of thread extending thcrethru to the work, and the end of the thread is again pulled between spring arm 233 and gib 22 to the full line thread position indicated; At approximately that portion of the travel of the needle after the thread passes thru the work on its first transfer and is engaged by the tensioning arm 240, the arm 237 engages lobe (d) (Fig. 22) and positively forces the spring arm 233 into tight engagement with gib 22 to positively grip the free end of the thread, when the most pull is being exerted thereon. This causes the thread necessary to the stitching operation to be pulled thru the tension device 226 from its source of supply.
It has been found that the needle, by reason of its many transfers from one needle slide to the other, some'tii'nes becomes turned, so that unless properly straightened, the thread hook 265 would have difficulty in passing thru the eye of the needle. To correct this difliculty, I provide a pawl 270 pivotally mounted from a lug 271 on casting 18, the pawl having a flattened nose portion 272 on one end thereof. At its other end, the pawl has a pivotal connection with a link 2733 which extends downwardly and projects thru lug 274. At the bottom of the said link, I provide a roller bracket 275 in which is mounted a cam roller 27 6 adapted to engage lobe (g) on cam ring G, the said cam ring being mounted on cam drum 63. Lobe (g) is so positioned circumferentially on cam ring G that it engages roller 276 and causes upward actuation of said roller and connected link to lower the nose portion 272 of pawl 270 during the last transfer operation of the needle from the right side needle slide to the left slide. As hereinbefore stated, during this last transfer, the work clamp is lowered and the needle passes over the work. The nose portion 272 thus engages the needle which is in substantially free relation to the gripping devices during its transfer and causes the needle to be straightened (Fig. 15). The needle is then gripped by the left side needle slide on its last backward stroke in proper position for the threading operation about to occur.
I also provide mechanism whereby the thread may be severed at the end ofthe stitching operation to permit the work to be free- 1y removed from the clamps by the operator. The thread-cutting mechanism comprises a knife 280 (Fig. 17) having angularly related surfaces 281 and 281" at the end thereof, the latter providing a' cutting surface, the said knife being fixed to arm 282 which is pivotally secured as by a pin 283 to a projection 284' extending from casting 18. The free end of said arm 282 is adapted to be engaged by a roller 285 mounted in lever 286, which lever is mounted for swinging movement on shaft and carries cam roller 287.
The said cam roller is adapted to engage cam lobes (f) and (F) on cam ring F, which is mounted on the cam drum 63. Engagement of the roller 287 with the said lobes causes an actuation of arm 282 about its fulcrum 283, and the knife 280 is positively carried beneath the thread as indicated in the dotted line positions. A spring 288 extending between casting 18 and the free end of arm 282 urges the said arm to its full line position when roller 287 rides off cam lobe f The angular portions 281 and 281 of the knife serve the function of supporting the thread during the stitching operations, and
of severing the thread leading to the work from the source of supply. \Vhen roller 287 engages the lobe j, the knife is projected beneath the thread so that the thread is caught by the portion 281. The thread from the source of supply to the work is thus held as indicated in full lines (Fig. 1) during the portion of the cycle following from the first transfer of the needle until after the completion of the stitching operations. \Vhen the left needle slide has been carried throughout its last reverse stroke, and after the threader hook 265 has pulled the thread thru the needle eye and is carrying the thread therethru downwardly, roller 287 engages lobe 7. The knife is resultinglybrought forwardly, and upon return actuation the cutting portion 281" engages the thread which is being tensioned by reason of the hook 265 moving downwardly, and severs the same.
The doubled thread carried by the needle from the work on the last transfer operation is broken and pulls away from the needle by reason of the short length of thread remainfor the last reverse stroke of the left side The operation of the device is as follows: The needle has been threaded manually, or automatically by the operation just completed, and the operator mounts the lowermost of the tips 207 held on the feed chute 204 on the threader pin 187 by manipulation of the push lever 198 and bent rod 217 as described with reference to Fig. 12. The fabric clamps 160 are in their lowered position as shown in Figs. 1 and 9. The fabric 290 to be stitched to the tip is wrapped about the tip as indicated in Fig. 31. The operator then actuates foot lever 106 and simultaneously pulls out operating lever 12 1, which causes link 112 to be raised and retained in raised position by finger 128 depending from the lever 124;. The upward actuation of link 112 causes lever 120 to rotate shaft 121 which in turn causes the fabric spring clamps to be projected upwardly about the fabric and tip positioned on threader tip 187 as in Fig. 10 and firmly grip the same. The tip and fabric are so positioned that the needle 232 passes thru the eye 223 of the tip upon its transfers from the left to the right needle slides.
As hereinbefore described, actuation of link 112 upwardly causes rotation of shaft 84 thru engagement of the clutch surfaces 91 and 98 of the clutch members 90 and 97 respectively, and worm wheel 82 is consequently driven, resulting in the rotation of drum 63. The left side needle slide mechanism carrying the threaded needle which has been in retracted position is projected on its forward stroke upon rotation of the cam drum 63, and the needle passes thru the elongated slot 200 in the spring clamp 160 and thru eye 223 of the tip 207 and fabric wrapped thereabout to the right needle slide which grips the needle and pulls the thread thru the tip. The said right slide travels throughout its reverse and forward strokes, the thread beingtensionedby the tension arm 240 during such actuation, and the needle is transferred to the left side slide. By reason of the engagement of the work clamp cam roller 175 with lobe (b of cam ring H, the cast member 163 is raised just prior to said last transfer, and the tip and fabric are raised out of the path of the needle which passes thru the lower portion of slot 200 in the spring clamps 160 and beneath the tip. The needle is then gripped by the left side slide which reverses its stroke, the thread being tensioned by theswinging movement of tension arm 240. The thread has now passed thru the eye of the umbrella tip and associated fabric and has been wrapped under the tip or relatively about the fabric. This operation is carried thru six times, resulting in six stitches being taken thru and about the tip and fabric.
The first three of the stitching operations are identical; the last three stitches differ in that the cam portions (71. (if) (h) of cam ring H cause the tip and fabric holder to drop prior to the transfer of the needle from the right to the left needle slides. The needle thus passes over the tip and fabric and results in the thread being wrapped over the same on the last three of the said transfers.
On the last transfer of the needle, which passes over the tip and is relatively free, the pawl 270 is depressed to engage the needle which is thereby straightened (Fig. 15). A relatively short length of thread is carried by the needle as theleft needle slide is projected thru its last reverse stroke, and the needle breaks away from this thread which extends to the work.-
At the end of the last reverse stroke of the left side slide, rod 228, thru the bottom of which the thread extends from the source of supply and leading to the work by reason of the first transfer of the needle thru the umbrella tip being stitched, is lowered and turned to position the thread directly over and across the eye of the needle. Simultaneously arm 262 and threader hook 265 is raised, the latter passing thru the eye of the needle and hooking over the thread.
Lowering of the hook 265 causes this engaged the same. The needle is now threaded and in position to commence the next cycle of operations and the fabric hasbeen stitched to the umbrella tip and the threadextending there to or therefrom has been severed.
The clutch surfaces 91 and 98 are then disengaged by the stop mechanism operated from the cam drum 63, namely, the engagement of cam lobe 154 with r'oller 153 which lowers lever 114; and also by mechanism on worm wheel 82 comprising the lobe 150 on said worm wheel 82 which engages arm 151, and rotation of the drum 63 is stopped. The fabric clamps 160'drop downwardly from the tip and fabric upon rotation of shaft 121, caused by lowering of lever 114, and the operator by actuation of push lever 197 opens clamps 188 for removal of the work and for the insertion of a tip for the next operation. By reference to Fig. 31, the fabric has been stitched to the tip in such fashion that its reverse side is upward. I propose to turn the fabric about its stitched part which will be relatively fixed, so that the tip and .fabric as sumes the relation as indicated in Fig. 32 when ready for application to an umbrella rib which extends into and is fixed in the bore of the tip.
I provide an attachment which permits the fabric cover to be stitched to the eye of the metal ribs of umbrellas as distinguished from tips which are positioned on the ends of the umbrella ribs and which usually characterize ladies umbrellas. This attachment com? prises an arm 291 (Figs. 3 and 33) mounted for swinging movement as by bolt 292 to the table portion 12 ofthe pedestal 10. The free end of the arm 291 has a bushing 293 fixed thereto which is suitably bored for the reception of an umbrella post. A stop lug 294 on said arm is provided which engages the table portion 12 when the arm has been turned so that the bushing 293 is positioned in the transverse plane of the tip and fabric clamps.
The arm 291, when its use is desired, is swung into proper position as determined by lug 294, and the umbrella frame is mounted in bushing 293 as indicated. The rib is bent by the operator to be grasped by clamping arms 188 which are opened by operation of hand lever 197. The threading pin 187 must be removed, and in its place a screw threaded plug 295 is inserted in the boss 185 of sufficient length to act as a stop for the end of the rib and whereb the usual metal eye of the rib is in the pat 1 of travel of the needle during the transfers thereof from the left to the right needle slides. The fabric is wrapped on the rib and upon the actuation of foot lever 106, the spring fabric clamps 160 are raised about the rib and fabric as hereinbefore stated. The stitching and associated operations follow in the same sequence and manner as described with relation to the tip stitching operation above described.
The above described sewing machine thus substantially automatically performs the various steps in the sewing of a fabric cover to a tip to be mounted on the rib of an umbrella frame or to the conventional eye at the end of the umbrella ribs, in an uninterrupted series of operations, formerly performed by hand. The operator need only mount the tip or rib and the fabric to be stitched thereto, and start the machine. In a practical and efficient manner, a desired number of stitches are then automatically taken thru and about the tip or rib and associated fabric, the thread is severed from the work and from the needle, the needle rethreaded for the next operation,
and the machine is stopped for the removalv of the Work. By decreasing the time and cost factors, production costs of umbrellas are materially decreased by the above machine.
From.the above, it will be seen that the present invention contemplates a practical device well adapted to accomplish, among others, all of the objects and advantages herein set forth.
1. In a device of the character described in combination, a frame member, gibs fixedly secured across said member, slide blocks mounted for reciprocation in said gibs, a needle, needle gripping mechanism mounted on said slide blocks and extending laterally thereof, a work holding mechanism positioned between said slide blocks, and mechanism to transfer the needle from one to the other of said gripping mechanisms and thru the work held in the work holding mechanisms.
2. In a device of the character described, in combination, a frame member, gibs fixedly secured across said member, slide blocks mounted for reciprocation in said gibs, a needle, needle gripping mechanisms mounted on said slide blocks and extending laterally thereof and each comprising a fixed and a movable jaw, a work holding mechanism positioned between said slide blocks. means to reciprocate said slide blocks toward and from each other, and needle release mechanism responsive to the reciprocation of the slide members to effect a transfer of the needle from one to the other of said needle gripping mechanisms.
3. In a device of the character described, in combination, a frame member, gibs fixedly secured across said member, slide blocks mounted between said gibs, means to reciprocate said slide blocks toward and from each other, a needle, needle gripping mechanisms mounted on said slide blocks and extending laterally thereof and comprising fixed and movable jaws, a work holding mechanism positioned between said slide blocks, needle release mechanism associated with said gripping mechanism a nd operative to transfer the needle from one needle gripping mechanism to the other thru the work positioned in said work holding mechanism when the blocks are adjacent each other.
4. In a device of the character described, in combination, a frame member, gibs fixedly secured across said member, slide blocks mounted for reciprocation in said gibs, a needle, needle gripping mechanisms mounted on said slide blocks and extending laterally thereof, means to reciprocate the needle blocks towards and away from each other, and means to transfer the needle from one needle gripping mechanism to the other when the blocks are adjacent each other.
5. In a device of the character described, in combination, a frame member, gibs fixedly secured thereto, slide blocks mounted for reciprocation in said gibs, a needle, needle gripping mechanisms mounted to extend laterally of said slide blocks, means to reciprocate said blocks towards and from each other comprising levers having a pivotal mounting on said frame member, link connections between said blocks and the ends of said levers, said levers at their other ends engaging cam rings on a rotatable drum, said first named means being responsive to the rotation of the drum for its actuation, and means responsive to the rotation of the drum to transfer the needle from one to the other gripping mechanism when the blocks are adjacent each other.
6. In a device of the character described, in combination, a frame member, gibs fixedly secured thereto, slide blocks mounted for reciprocation in said gibs, a needle, needle gripping mechanisms mounted to extend laterally of said slide blocks and each comprising fixed and movable jaws, means to reciprocate said blocks towards and from each other, and means to release the needle in one mechanism and to grip the needle in the other gripping mechanism comprising spring arms engaging said movable jaws to maintain the same in gripping engagement with said fixed jaws,
and members engaging said spring arms to cause movement of the movable jaws out of gripping relation with said fixed jaws.
7. In a device of the character described, in combination, a frame member, gibs fixedly secured thereto, slide blocks mounted for reciprocation insaid gibs, a needle, needle gripping mechanisms mounted to extend laterally of said slide blocks and each comprising fixed and movable aws means to reciprocate said blocks towards and from each other, and means to release the needle in one mechanism and to grip the needle in the other gripping mechanism comprising spring arms engaging Lil . said movable jaws to maintain the same in gripping engagement with said fixed jaws, members engaging said spring arms to cause movement of the movable jaws out of grip-V -mechanism comprising members engaging said movable jawscto actuate the same out of gripping relation with said fixed jaws, mechanism to actuate-said last named members,
mechanism to impart reciprocation to said needle'slides toward and from each other, a
i work holding clamp positioned between said needle slides, and mounted for reciprocation,
-' a rotatable cam drum mounted in said frame member, cam rings mounted thereon. link connections between said cam rings and sald mechanisms and work clamps to cause reciprocation of said needle slides and transfer of the needle from one gripping mechanism to the other and thru and about the work held in said work holding clamps.
. 9. In a device of the character described, in combination, a needle, work holding mechanism, needle clamps disposed at the sides of saidholding mechanism, and means to transfer the needle thruthe holding device from one to the other of said needle clamps, said I holding device comprising a reciprocable member, a pin extending from said reciprocable member u on whlch a portion of the work is adapte 'to be positioned, pivoted clamp arms mounted on said member and adapted to grip the work so positioned,
spring clamps mounted on said reciprocable member and adapted for movement independently thereof to position another portion of the work about. the work held on said pin, and means to bring-said clamp arms into and out of clam ing engagement.
' 10. In a eviceof the character described,
' in combination, a needle, work holding mechanism, needle clamps disposed at the sides of said holding mechanism, and means to trans fer the needle thru the holding device from one to the other of said needle clamps, said holding mechanism comprisin a reciprocable member, a pin extending t erefrom, pivoted clamp arms mounted on said member,
and means to bring said clamp arms into and out of clamping engagement with the work positioned on said pm.
1 11. In a device of the character described,
- in combination, a needle, work holding mech- 2 an sm, needle clamps disposed, at the sides f said holding mechanism, and means to transfer the needle thru the holding device, said holding device comprising a reciprocable member, a threader pin extending therefrom, pivoted clamping arms mounted on said member adapted to clamp about the work mounted on said pin, said member having an operative connection with a cam ring mounted on a rotating drum whereby it is reciprocated subsequent to at least one of the needle transfers.
12. In a device of the character described, in combination, a needle,work holding mechanism, needle clamps disposed at the sides of said holding mechanism, and means to transfer the needle thru the holding device, said holding device comprising a reciprocable member, a threader pin extending therefrom,
pivoted clamping arms mounted on said member adapted to clamp about the work mounted on said pin, said member having an operative connection with a cam ring mountedon a ro- ,tating drum whereby it is reciprocated subse quent to at least one of the needle transfers, spring clamps on said reciprocable member, and means to bring said spring clamps into operative engagement about said work independently of the reciprocation of said reciprocable member.
13. In a device of the character described, a needle, a work holding mechanism mounted for reciprocation, slide members mounted for reciprocation on each'side of said holding mechanism, needle gripping mechanism mounted on said slides and comprising fixed and movable gripping jaws, needle release mechanism in operative relation to said gripping mechanism and inclusive of, a member adapted to depress .said movable jaws to release theneedle, a cam drum mounted for rotation, cam rings thereon individual to each of said mechanisms and. link mechanism operatively-connecting said cam rings to said mechanisms whereby upon rotation of said cam drum the needle is released from onegripping mechanism and transferred to the, other thru and relatively about the work in said holding mechanism.
14. In a device of the character described, in combination, a needle, a work holding mechanism including amember adapted to position the work, and clamp and spring members adapted to hold the work, said spring member having a needle aperture therein, slide members mounted for reciprocation on each side of said holding mechanism, needle gri ping mechanism mouflted on said slides, nee 1e release mechanism in operative relationto said gripping mechanism,
a cam drum mounted-for rotation, cam rinthereon individual to each of said mechanisms, and link connections betwen said cam ti and said mechanisms whereby upon rotation of said camdrum, the needle is, released from one gripping mechanism and transferred to the other tlhu the aperture in