US1692016A - Stitching machine - Google Patents

Description

J. WOLF ET AL STITCHING MACHINE Filed sept.12, 1924 s sheets-sheet 2 Nov. 20, 1928. 1;692,0l6

J. WOLF ET A1.

STITCHING MACHINE Filed sept. 12, 1924 5 sheets-sheet 3 82 MIMI J4 83' m' .56` J8, JZ

:;.;.;. :53:5 yg I z 8j`/ 8 i680, 76 l Patented Nov. 20, 1928- UNITED STATES f PATENT OFFICE.

J'OI'IN WOLF AND ERNEST LESCHI-IORN, 0F CHICAGO, ILLINOIS, ASSIGNORS TO LATHAM MACHINERY COMPANY, A lCORPORATION 0F ILLINOIS.

STITCHING MACH-INE.

Application filed September 12, 1924. 'Serial No. 737,230.r

This invention relates to improvements in stitching machines. Y

, The principal object of the present invention is to provide a simplified stitching maby providing a construction and arrangement of the various parts iii the manner hereinafter described and pointed out in the appended claims. z

Referring to the drawings Figi is a front elevational view of our improved form of simplified stitching machine.

Fig. 2 is a cross sectional view of the same taken on the lines 2-2 in Fig. 1.

Fig. 3 is a cross sectional view taken on trie lines 3 3 in Fig. 1.

Fi 4 is a cross sectional view taken on the lines 4.4 in Fig. 3.

Fig. 5 is adetailed-view showing a front elevation ofthe cutting mechanism.

Fig. 6 isa cross sectional view taken on the lines 6 6 in Fig. 1 showing the manner in which the pivoted bracket is mounted and Y Fig. 7 is a cross sectionalvicw taken on the lines -JZ in Fig. 5. v

For the purpose of illustration we 'have shown our improved and simplified stitching machine detachably secured to an arm 10 of the main frame of the stitching machine; rl`lie stitcher head is removably secured to the arm l() by means of three bolts ll (only one of which is shown). These bolts 11 secure radially extending flanges 13 of the arm 10 to a plate 14. The plate 14 has secured thereto by means of screws 15 a spool supporting bracket 16 which is offset with respect to the longitudinal center of the machine and sup-- ports on the upper end thereoffaspool of wire 1'?. Thespool isheld from laccidental rotation by a pressed spring brake 18 which has itsouterend curved substantially in the form of semi-circle 19 for guiding the wire through the usual wire straightener device 20 and wire spring pressed check mechanism .Rotatably mounted within the arm 10 in suitable bearings not shown, is a'main drive shaft Y gear 26l and butts against one end of a stud 27 as shown at 28. The stud 27 is journalled.

in a bearing portion' 29 of the plate 14. The gear 26 is secured to the stud 27 by means or a studQ to be substantiallyV a'contlnuation `of the main drive shaft 22 and at the-same time permits the stitcher head to be detached from the arm l0 when it is desired to remove the head. Secured to a reduced portion 31 of the stud 27 is a cam 32.. Positionedforwardly of the cam 3:2 is a second cam 33 which has a wire feeding surface 34 'on the outer periphery thereof. These Vcams 32 and 33 are secured to the stud in any well'known manner .but preferably by a washer andbolt V33". Positioned directly above the cam 33 and operatively driven by a gear 35, whichvis secured toa stud 36 is a second feed cam or roller y37 which is provided with a peripherally pro-y jecting wire feeding projection or cam surand driving mechanism. The stud 36 is mountedl in .a bearing .portion -39 which is formed integrally with .akpivoted bracket 40. The bracket 40 is pivoted by means of a shaft Y 41 to spaced bearing ears 42formed integrally with the plate 14. .The shaft 41 is secured in" position by a set screw 43 in threaded engagement with the pivoted bracket 40 and engagepin 30. This arrangement `permits the f "iol uspv

able with the shaft 41. The free end of. the

pivoted bracket 40 is provided with a boss 44 vhaving van aperture V45 extending therethrough wliichis adapted to loosely receive a threaded bolt 46. The lower `end of the` threaded bolt 46 is secured ina lug 47 formed integrally with the plate 14 by a pin 48 which extends throu'Uh a registering aperture inthe. lug 47 and in t-. e threaded bolt 46. The upper end ofthe bolt has in threaded engagement therewith la rthumb screw 49 which may be adjusted on thebolt 46 for varying the tension on a compression spring 5() mounted on the bolt 46 between the thumb screw-49 and the boss 44 of the swinging bracket 40. The bearing portion 39 of the pivoted bracket 40 extends through a relatively enlarged aperture 51 formed -in the plate 14. From the above description it will be noted that by reason of the pivoted bracket 40 and compression spring 50 which normally presses the -pivoted bracket in a downward direction, that the feeding surface 38 of the feed roll 37 is thereby resiliently pressed into engagement with the feeding surface 34 of the cam 33 when the wire is gripped Vbetween these feeding surfaces in the operation of feeding the wire.

A `AThe feeding mechanism may be adjusted to lifeed wires of varying lengths by adjusting the feed roll 37 in such a manner that the wire feeding surface 38 cooperates during a greater or lesser' portion of the cycle of operation to impinge the wire during a greater er less arcuate movement of each of these members. This is done by adj usting the roller 37 through the medium of a `clamp ing washer and bolt 51.

From the above description it will be noted.

2B' that positioning one of the feed rollers or feed cams on substantially the main drive shaftwe `have; eliminated a number of intermediate parts and have compactly arranged the feeding mechanism iu close association with the main drive shaft and thereby reduced the sizeof the machine to a' consider'- able extent.

Formed in thefront side of the plate 14 is a usual staple'forming channel 51 having reciprocally mounted therein a staple former 52 which in turn is provided with a vertically extending channel 53. The channel 53 of the staple former 52 has reciprocally mounted therein a staple driver 54. The staple former 52 is operably driven to form staples by the c 'am 32 which engages a roller 55 joui-nailed on a pin 55 secured to the rear side. and up-V per end of 'the staple former. rlhe staple former is normally returned to its uppermost position bythe compression spring 56 which is seatedin a socket 57 formed in the forward side of the plate 14 adjacent the staple'former.A The upper end of the compression spring 56 is positioned in a tubular member 58 which 5(4jln'orm`ally engages the pin 59 secured to the rear side of the staple former just below the roller 55. The tubular member is reciprocally mounted in the socket 57 as clearly shown in Fig. 2.v The staple driver 54 is op-k eratively drivenby the usual pitman connection 60 which has one end thereof connected as shown at 61 eccentrically with respect to the axis of the cam 33 and the other end therej c of connected as shown at 62 to the upper end 60' of the driver. (3o-operating with the staple forming and driving mechanism is the usual anvil 63 and staple supporter 64. 63-is provided with a Vwire groove 65 and a compression spring 66 which norma lly forces the anvil out into the path of the staple form- Leeaoie A lknown in the art and a more detailed'description of the operation and construction of this mechanism is thought unnecessary. Y

Adjustably mounted adjacent the staple forming and driving mechanism is our improved wire cutting mechanism which coinprises a horizontally adjustable block 68 which has a rearwardly projecting extension portion 69 which is adapted to slidingly engage a channel 7 O formed in the forward faceV vof the plate 14' for horizontally adjusting the Y block 68 withrespectto the forming and driving mechanism. Mounted in the block 68 and secured therein in any well known manner is the usual cutter tube 71. Secured to the block 68 at the opposite ends thereof andV extending upwardly therefrom are two guiding pins 72.' Reciprocally mountedvon the guiding pins 72 is a cutter block7 3 and secured to the cutter block 73 on theside adjacent the staple forming.and driving mechanism by means of a screw 74 is the usual knife 75. Formed on the-inner side of and adjacent the top of the cutter block 73 is a projecting flange 76 having thereunder undercut channel 77. Intermeshing with the flange 76 and undercut channel 77 in a manner to engage and operatively actuate the cutter block 73 is a reciprocally mounted plate 78 which is positioned between the front plate 7 9 and the main plate 14 of the stitcher head.V The front plate 79 is secured to the main plate 14 by means of machine screws 79. The front plate 79 is provided with Van offset port-ion as shown at 80 forming a shouln der 80 which forms a stop for the upward movement of the cutter block 73. The cut# ter block 73 togetherV with its reciprocally mounted plate 78 is normally actuated to its uppermost position by a compression spring 81 which is seated in the recess socket 82 formed on the front side of the plate 14 as shown in Figs. 3 and 4. Theupper end of the compression spring 81 is adapted to have seated thereon the head 82l of a spherical headed pin 83 secured to vthercarside of the reciprocating plate 78 in'any well known manner. The plate 14 is slotted as shown at 83 so as to permit the spherical vheaded pin to reciprocate in the operation of severing the wire. The cutting mechanism is actuated to cut the Wire by a lever 84 pivoted at 85 to the plate 14. y The lever 84 has an upwardly' curved portion as shown at 86 which is adapted to be engaged by a cam portion 87 formed asY an integral vpart of the wire feeding cam member 33. vThe lever 84 is further provided with a laterally projectingportion 88 which eoA - mezcle face 87 of the cam 33 will engagethe free end 86 of the lever 84 and swing said lever in a; counter clockwise direction thereby forcing n the reciprocating plate 78 downwardly with its cutter block 7 3 and actuating the knife to cut the wire extending through the cutter A.

tube 71. ln connection with adjusting-our improved cutter block horizontally with respect to the staple forming and driving mechanism we have provided a series oftapered or conical cavities 92 which are adapted to v be engaged by a tapered or conical point 93. of a thumb screw 94.' The thumb screw 94 y 1s in threaded enga-gement with the front plate 79 as shown at 95. e

F rom the above description it will readily be understood that when isdesired to adjust the Cutter blocl 73, together with the cutter tube and block 68, the thun'ib screw 911i is unscrewed from engagement with one, of the cavities 92 of theblock (i8 and the cutter blocks 73 and 68 are herizont'aliyv adjusted by sliding this cutting mechanism in the channels or intermeshing parts 76, and 77 between the lower end of the reciprocating plate 78 in the upper part vof thev cutter block 73. ln

this adjustment it will, of course, be understood that the cutter block 68 is' adjusted longitudinally of the plate le by the rearwardly extending projection 69 engaging-the channel formed in the forward face of the,

plate lll and when the predetermined adi ustment of the cutter block has been determined the thumb screw 94e may be tightened to secure or slamp the cutter block in a. relatively position with respect to the staple forming and driving mechanism.

in the operation of he above described device it w ll be understood that the wire is fed l from the ool 17 around the semi-circular guide l) throught-he wire straightener and wire checking devices 20 and 2l respectivelyD where isengaged by the feeding surfaces 39 and 34 of the feed rollers and feed .cams S7 'and S3 respectively, through a circular guide tube 9G into the main tube 7l where it passes into the groove (35 formed in the front end of the anvil 63. After the wire is thus fed the cam portion 87 of the-wire feeding cam 3? engages the free end-of the cam 8G andactuates the lever about its pivot 85, depreming the cutting mechanism through the reciprocating plate 78 against the tension of 'he compresspring` 8l, thus causing the wire extending through the tube 7l to be severed adje-1 cent the staple forming and drivingmechanism. Simultaneously with the severing vof the wire7 the cam 32 engages the roller 55 Journalle'd tothe rear side of thefstaple former 52v and depresses the staple former- 52 against the action of the compression spring 56. At the completion of the staple forming operatifn the staple driver 5d is then actuated thi-(nigh the medium of the pitman connection 60 in driving the staple into the Work beneath the head of thestitching machine. a It will of course be understood that the anvil 'G8 is forced from the path ofthe staple formand driving mechanismby the staplel driver' which engages the bevelledfront face of the'anvil in its-downwardmovement and then the staple supportingmember 64 is likewise forced outwardly by the downward movement of the staple driver as itis completing its work in driving the staples.V

F rom the above description it will be rea-dily seen that We have provided avery simple and enNicient wire stitch-ing machine and one in which the parts are reduced to a minimum and'at the .same time we have retained a Wide arrangement of adjustments'. e y

It will; further be noted that by mounting one of the-wire feeding cams. of they feeding; mechanism on thevmain drive sli-aft or an eX- tension thereof that we' havev provided a construction in whichV all of the parts are compactly arranged and the number of parts reduced to a. minimum,thereby reducing the manufacturing cost and also reducing the 'wear on the operative parts ofthe machine.

W'hile in the abovev specification we have described one vembodiment which our invention may assumein practice i't willl of course be understood ythat the same is. capable of modification, andthat 1nodilication '1nay beV made without departing from the spirit and scope of thefinvention as expressed in the following claims. 1

lV hat we f claim 'as our invention and desire to secure by Letters Patent is: v

i. In a wire stitching machine, the combinationA with a frame, of av drive shaftv mounted in said frame,A a, wire feeding mechanism e mounted on said; frame anddirectly connected toeaid drive shaffh' and -a staple forming and ng mechanism positionedr directly beti rely dri'vcaby said drive shaft;

2v. in a wire stitching machine, the combi- 1d wire feeding mechanism and; opera.- i.

nation with a frame, of a drive shaft mounted l ai d frame, a wire feedino'- mechanism posi.- tioned at the forward end or said drive shaft, a staple forming and driving-mechanism red directly below saidrv feeding mech-v in and operatively driven by said drive Y .estitchingmachine, the combination with a frame, of a shaft mounted there'- inw c feeding mechanismvv mounted on said frame and operatively connected with said sh"7 and staple forming andadriving. mechmounted-'onsaid frame and operatively connected with said' shaft, `the lmediali lline` of all the said mechanisms being' in the vvertical longitudinal. plane of the axis of said driving shaft. .f

4f. In a wire stitching machine, the combination with a frame, of a drive shaft mountedr in saidframe, a wire feeding cam secured to said drive shaft, staple forming and driving` mechanism operatively connected to said drive shaft, and ai cutting mechanism operatively connected to said cam for cutting the' wire fed by said cam.

. 5. in a wire stitching machine, the combination with a frame, of a driveshaft mounted in said frame, a wirefeeding mechanism coinprising a plurality of co-operating feeding` cams, one ofsaid cams secured to said crive shaft, the other of said cams operatively `ger-red to said driveshaft, staple forming and .driving mechanism positioned below and operatively connected to lsaid drive shaft, and a cutting mechanism positioned on one side of said staple forming` and driving niechanism and actuated by the cam secured'to said drive shaft for cutting the wire fed by said feeding mechanism. Y 6. VIn a wire stitching machine, the combiynation witha frame, of a drive shaft mounted 'in said frame, a wire feeding inechanisin'comprising a plurality of co-operating feeding cams, one of said cams secured to .said drive shaft, the other of said cams operatively geared to said drive shaft, staple forming and driving mechanism positioned below and l ope 1ativclyconnected to'said drive shaft, and

a horizontally adjustable cutting mechanism positioned on one side of said staple forming and driving mechanism and .actuated by the cam secured to said drive shaft for cutting the wire fed by said feeding mechanism.

7. In a wire stitching machine, the combination with a frame, of a drive shaft mounted in said` frame, a wire feeding mechanism comprising a plurality of co-operating feedcains, one of said cams secured to said drive shaft, the other of said cams operatively geared to said sliaft,staple forming and drivingimechanism positioned below and 'opera tively connected to said drive shaft, a cutting ,mechanism positioned on one Vside of said staple forming and driving mechanism and actuated by the cam secured to said drive shaft for cuttingthe wire fed by said feeding mechanism, andineans whereby said feeding mechanism and said cutting mechanism may Vbe adjusted` to vary the length of staples made mechanism, wire cutting mechanism posiy tioned on one side of said staple forming and driving mechanism, and operative connections positionediii the path'of one -of saidv cams whereby said cutting mechanism is actuated to cut mechanism.

.9. fr wire frame, a drive shaft mounted on said frame, a Iwire feeding member mounted on said frame and adapted to rotate concentrically with said shaft and driven thereby, aA bracket the wire Vfed `byy said *feeding` stitching machine comprisingV a pivotcd to said frame "and carrying a wirey feeding member above said first named member, a staple forming and driving,mechanism positioned directly below 'saidy first named feeding member and operatively -`coniiected with said shaft, and guiding meanswh'ereby the wire if'. fed ybv said feeding members to said staple formin g and driving mechanism.

l0. Awre stitchino' machine com risino a i frame, a drive shaft mountedV on saidframe. a wire feedingl member mounted A on `said. frame and adapted to rotatel concentrically with said shaft and driven thereby, a bracket pivoted to said frame and carrying' awire` feedingmember above said first named member, and a. staple driving mechanisinfp'ost c tioned directly belowsaid-hrst ynamed fcedf ing member and associated therewith in a manner to be driven thereby. l 1l. A wire stitching machine comprising a frame, a drive shaft mounted on said frame,

a wire feeding member mounted on said frame and adapted to rotate concentrically with'said shaft and driventhereby, a bracket pivoted to said frame and carrying a wire feeding men ber above said first named member, a staple forming and driving mechanism positionedv directly lbelow'said first named feeding` member, a cai-n mounted on said drive shaft for operatively driving said staple' forming mechanism, and a pitmanconnection for connecting said first named feeding member and saidstaple driving mechanism for operatively drivingsaid staple driving meclianismy l2. A wire stitehin g machine comprising` a fraine,a drive shaft mounted on said frame, a wire feeding cam mounted on and operatively driven by said shaft, a swinging brac-liet piv-A oted to said frame and having a wire feeding roller joui-nailed therein, said wire feediiigf roller being opcrativelyrelated to said shaft and co-operating with said first named cam for feeding wire between. their surfaces, staple forming and driving mechanism positioned below saidwire feeding mechanism, wire .cutting mechanism positioned on one side of said staple forming and driving mechanism, means actuated by ysaid wire feeding cam for actuating Vsaid cutting mechanism' to cut the wire fed by Said feeding mechanism, and means operatively connected to said shaft for actuatingp said staple for ning and vdriving mechlanism.

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13. A wire stitching machine comprising a v frame, a drive shaft mounted on said frame, a. wire feeding cam mounted on and operatively driven by said shaft, a swinging bracket pivoted to said frame-and having a wire feeding roller journalled therein, said wire feeding roller being operatively related to said shaft and co-operating with said' first named cam for feeding wire between their surfaces, staple forming and driving mechanism positioned below said wire feeding mechanism, means connecting said'stap'le driving mechanism with said wire feeding cam for actuating said staple driving mechanism, and means for operating sai d staple forming mechanism.

lei. A wire stitching machine comprising a frame, a drive shaft mounted on said frame, K

ay wire feeding cam' mounted on and operatively driven by said shaft, a swinging bracket pivotedto'said frame and having a wire feeding roller Journalledtherein, said wire feeding roller being operatively relatedto said v pitman connection connecting said stapleV driving mechanism with said wire feeding cam for actuating said staple driving mechanism, and means mounted on said shaft for operating said staple forming mechanism.

In testimon whereof we have siUned our D names to this specication, on this 29th day of August, A. D. 1924. y y

- JOHN WOLF.

ERNEST LESCHHORN.

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