Патент USA US2404180код для вставки
-July 16, 1946. 2,404,180 ,1_ w, KING ErAL BURR REMOVING' APPARATUS Filed May 11, 1945 5 Sheets-Sheet 1 _1_ ___ _ _ _Sk mm_ _.QQ H_._ --_ _ _ mmmf.; A o_ Gf oQQo|_______ o._.|.|- ___ \____ TQ». ilíÍlw l..m_____ _ .In__ __ _. wm_(1... 0I/______ WS _ _ __„vì @www _w _I_S _ _ __ „vw__uœm\ _____ mv - ww _\ ______ _ > «NT» VM. omg; NQ_ _NQo_ _, l0|.___ _I___ _ummm |_ |_VMN»._,\\_\m.\_ i 7____-__ _ w. „uuulIÚÍÍ ____. __ ._ :|l _ _ _ N N _ mw HM ___ __» NQ _. _ __ _ _Í J W.._NW _ ___: G ____ Q _ U_„Ro/6 EI Wu_. ._î_R A _m .Il .uH H.m_____\.|. m _yW _| _ I_ July 16, 1946. ' 4 ' 4 J. w. KING Erm. ` BURR REMOVING A2,404,180 ABPARATUS Filed May ll., '1945 4 5 lShee‘l:s--Shee’v, 2 ® Ill 'al 4h.. /33 /N Vf/v ro/es . J. W. KING * 6. sïuHu-'AAUTH Y ' Arran/vtr » July 16, 1946. ' ' J, vw.' KING ETAL l 2,404,180 BURR REMOVING APPARATUS Filed May ,11, 1945 ‘ 'A ¿sheets-sheet s '» ß. 'A74 »Arron/_ver ' July 15,1946» ` ' J. w'° KING Erm. 4 BURR REMOVING APPARATUS Filed May V11'l 1945 /55 /53 _ 2,404,180 I » 5 Iaaneen-smet 4 ' ` /56 ' /// 32 /3 J WMA/6 6.570,61 FAU TH , 19)’ „A17 f 4.7# - Arron/Ey July 16, 1946. J. KING ET_AL ‘ 2,404,180 ‘ "BURRI REMOVING 4APPAR-ÀTUS Filed May l1., 1943 5 Sheets-Sheet 5 /45 A wmf? Patented July 16,f 1946 2,404,180 - UNITED STATE s PATENT oFElcE 2,404,180Y _ BURR REMovING APPARATUS . ' John W. Kingnlûak Park, and GeorgeStuhlfauth, Chicago,' Ill., assignors to >Western Electric ¿ Company, Incorporated, New York, N. Y., al. " corporation of New York , ' ‘ . ' " Appliéation Mayu, 1943, serial No.' '486.580 ’s claims. (c1. zei-3:5)V . . 2 . This invention relates to burr removing appa ratus and more particularly to an apparatus _for Fig. 4 is a planview ofthe 4apparatus shown in Fig. l, parts being broken away to conserve removing the burrs resulting from broaching sur space and showing diagrammatically the actuat faces of an article. » ing mechanisms for the clamps which hold the In the manufacture of some articles, itis de Ul frame during the removalof the burrs therefrom; sired to form cooperating surfaces thereof to con Figs.,5, Gand 7 arefragmentary detail views of form very accurately to a desired contour and, the cutting knives for removing the burrs from accordingly, 'these -surfaces are formed by broach the side edges of portions of the .frame shown in ing operations. When broaching is performed, it ' Fig.v 1, Fig. 5 being a side elevational view of the quite frequently happens that burrs are thrown knife and Figs. 6 and 7 comprising sectional views up by the broaching tool, which must be removed takenalong the lines 6„-6 and 1-_1 Íof Fig. 5 in either by hand or by some machine designed for this purpose. . Y . the direction of the arrows; i _ . s Figs. f8 and 9 are vertical sectional’views on an . enlarged scale taken substantially along therlines It is an object of the ~present invention to pro vide a simple and inexpensive apparatus for re -moving burrs from articles. A' 8-8 ,andafà of Fig.„4 inthe direction of the ar rows and> showingdetails of the clamping mech . v anismand the> drivingmeansfor the files; In accordance with one embodiment of the in vention as applied to a telephone switching frame assembly which has had three of its surfaces sur face-broached, mechanism is provided for simul taneously initiating the operation of clamping de 20 vices to clamp the frame in position and‘to initi ate the operation of removing broaching burrs from edges vof each of the three surfaces, In the particular embodiment vof the invention chosen 25 operating cutting knives Aand files. The files which remove the burr from the end edges of the surfaces which have been broached are driven the arroWS; . ' Y ',Fig. 11 isa fragmentary front elevational Viewv of the clamping mechanism for holding a frame in positionVV in the apparatus and taken substan tially along the line I I-.-IN I>` of either Fig. 8 or. Fig. 10;Fig. 12. is a'plan sectional j., . View N.. taken i. substan for illustration, the two side edges and an end edge of a surface, which has been formed to the desired dimension by a broaching operation, has the broaching burrs removed therefrom by co Y Fig__10 is a Vplan sectionjtaken, substantially along the line _lO-V-ID of Fig. 8 in the direction o tially along >theline V|2---|`2 ofY Fig. 8 in the direc tion of the arrows showing .details of thedrive 30 mechanism for- theknives .and theiiles; and ` Fig. 13 is a vertical sectional view taken sub stantially along the line |3-I3 ofV Fig. 8 in the directionof the arrows.l Y . , through a substantîallycircular path-to finish the end edge to a high degreeof accuracy, where . Referringto the drawings, wherein like ref broached surfaces simultaneously. switch Vertical unit base assembly is shown .at erence characters Vdesignate Ythe same parts as the two opposed knives are driven in a straight 3 Ul throughout the several'views,particular reference line tocut the two side edges of two of three being- had- to Fig. 1 wherein a telephone crossbar , . A better understanding of the invention may be had by reference to the following detailedde I9, it will be seen that the base assembly com prises a mainframe member 20 having an arma scription when considered in conjunction with 40 ture .Supporting leg A2l* formed. integrally there the accompanying drawings, wherein with. The 'main frame‘member 20 has an `in F‘ig- 1 is a View in perspective of a telephone verted U-shaped member 422> suitablyïattached thereto,y for ',example, by welding, „and -this crossbar switch vertical unit frame having three armature supporting legs which have been formed U-shaped member has depending leg portions 23 in a broaching operation,> which legs are to be 45. and 24. `The leg24 cooperates with theleg »2l to trimmed by means of >the apparatus embodying ' form the armature support of theswitch and the leg 2|,V leg 24 fand leg 23 arev all cut- accurately the present invention; by a broaching _operation tor have their lower Fig. 2 is a side elevational View, partly broken away, of an apparatus for broachingthe surfaces surfaces in the same plane. This results in throw of the frame shown in Fig. 1 and showing some 50 ingl up a burr valong the >two‘side edges and one end edge of the legs 23 and 24 `and also results details of the mechanisms for driving the cutting in throwing up a burr at the front edge of the leg knives; ' Fig. 3 is a detail view of one of the cutting 12|, as_viewed in Figgl. Since the legs 2|1`and 24 knives showing diagrammatically the path of serve as_pivot’points for the `armaturejoi’ the travelthereof in performing its operation; . . switch andthe pivotrocks onnthe front' edge of 2,404,180 ' 4 _ of clamping position when the> lever 52 is rocked the legs, as shown in Fig. 1,'it is necessary to re move these burrs from the legs 2| and 24. Since the leg 23 is formed in the same plane as the bot tom surfaces of the legs 2| and 24, the leg 23 must clockwise, as shown in Fig. 8, due to the cam roller ' 62 mounted on the lever r52 engaging the high portion of the cam surface 63 on the lever 5e. _ Y also have the burrs removed from it. The apparatus _ifor removing- the burrs from Y the legsof. the switch frame assembly‘lß ismount-V ' ed upon a suitable base 25 and includes a Ydriving When a frame assembly l9'is to be operated upon, it may'beplaced; as shown rnost clearly in Figs. l0 and-11, withthe lower edgerof the main frame member 2U resting on a support block shaft V25 continuously driven bya motor 21 (Fig`- ¿jj Q15, whichvhas a cut-out 16 formed in it for re 4),. The shaft 25 has a sprocket> 'M_rnounted`Yr _Iceiving a depending portion of the main frame thereon'f-or drivingY achain 29, which, in turn,` Y lwork 20. The leftend (Figs. 10J 11 and 13) will engages a sprocket 55 of a single revolution-clutch f » be- supported upon a support block 11; which fits ’ SI vof any suitable type, which may~bej?enderedÍ . finto/the „Ulshaped member 22. The lever 674Y will operative to drive ashaft32 throughya single 1_.. clarnpjthe-legjâ, of the U-shaped member 22 revolution ¿each Vtime al controlling handle 33 ¿is against thesi'de',V of the support Yblock 'l1V and the .Y depressed', ’ The details of construction., of: theY ._ Vclamping,pins 51 and 5,3 «will clamp?thejmain -frame'member 2ï!V against the front face> of the single V`revolution clutch 3 I, Ynot forming" an" es: 15? 1 , _ _ , . sential portion of the’pre'sent invention; haveîlï. support „block 11» andan upwardlyY extending frame member 18 formed integrally with the sup ' ' that any _suitable single revolution-clutch operable V2d Y port block_15. The support block 11 is îalso pro vided withan upwardly' „extending frame' mem as ¿ described >may bel used in the apparatus. In ber§19,l against 'the front surface Vof which the additîonto driving the shaft-32 through one cycle U-shaped member 22 will bear. The two frame of> rotation, the single revolution clutch 3l, when l .I . not been shown in detail and it will be understood I rendered operative by manipulating the handle members 18 _and 19 are attached to legs 8l! and 33, also drives a cam A3.4 through a single revolue tion- to operate -a switch 35 for supplying power to'éner'gize either a coil 361er a coil 31 forming. a bracket‘82; which is, in turn, mounted upon `an 8|, respectively, of kaA substantiallyl U-shaped upwardly extending portion 8.3 of theV 'standard 55. Injaddition' to being supported by Ythe U part ofA a solenoid operated switchhavinga shift shaped memberA 82, at their upper ends, theV sup' ablefcore „38 which will be attracted by either the core Segorßl, depending upon which of the coils t. port blocks 1,5 and11 rest upon and arefixed to the portion ofthe standard 55 in'which the has battery connectedito it:through1.the switch rocker shaft 53 is journalled, as may be seen 55. The core 38, in its movement, will operate particularly by reference to Figs. 8 and 9. In an actuating lever Y39 >of Ia valveflü. The switch 35, whenthe apparatusis in its normal inopera- _ yaddition to the clampingjmechanisms just de tive'position, normallysupplies current tothe . scribed, the lever 52 is providedwith a rearward coil 31 and. fluidlunder pressure will be directed Vfrom afsòurce Knot Shown) through' a -pipe 4l, through the passages in the valve, to the fr_on-t end of a cylinder 42. However, assoon as the ly extending _clamping projection 84, which, when the lever is moved to its operative position, as shown in Fig. 8, will engage theupper surface of' the` U-shapedmember 22 to clamp it tightly in clutch..3| becomes operative due to theoperation 40 place-’on the upper surface'of the support block >1p1, thus torhold the frame kassembly Yl ä during the of the handle V31%,.the switch 35. will disconnect power fromithe. 'coil r31 and connect power to Y operate the‘coil' 35,:thereby movingsthevalve ¿l5 to the‘opposite positionto that shownto direct the fluid underV pressure from the’V pipe Mfto the i Y ¿A'pistonlnot shown.)` in the cylinder '42 serves to drive a piston rod 150, which hasI pivotally con succeeding operations'thereon. Y l Y' ' 4'By _means ofV the clamping mechanism just de scribed, «aA ßswitch 'frame assemblyV I9 -’to haver the burrs removedzfrom it may be clamped in posi? tion'tobe worked upon by _files 90, HandÍ 92 and cuttingknife assemblies >93 andällf. The shaft _ Shin _its cycle of rotation, will operate' theA files SU, _Sl .and 9.2 Vand thej cutting knife assemblies nected to italink15l for driving a lever 52. The lever 52 is attached to a rocker shaft 53, bymeans 50 $3 _andiâmd in a> ñxed- sequence starting Y from Athe Vnorrn ’ inoperative; position of the apparatus as of -a set screw 54, and serves to rock the sli-aft 53 _each r.time the link 5l is actuated.î The shaft 53 ' shown' „in Fig. 2_.1 _The first/operation performedA is journalled in an irregularlyshaped standard 55 >and carries alever 'éëatits right end, as seen most> clearly in Figs. 11 and 12. _At their upperV . ends, the levers 52 and 55 carry clamping> pins 51 and 58, which’are VslidableV in vshouldered'aper tures_.59fand 55 (Figs.„8 Vand 9) [and are urged »_ _ towardîthe frame Vassemblyfl@ »to clamp it when f Y on the frame >E e isßeffe‘ctedï byv the cutting knives, _as _shown most clearly` in Figs. 5, V6 and 7, where theputtingiknife assemblyiää'isshown, _In this assembly, a' pairmof, irregularly Yshaped knife blades> 55 ¿and> ßßarefrnounted’upon a block 91. The_blockßl, asishownjjn‘iost clearly in_Fig. 11, is'rroyidedm i laV depen‘dir'ifgi'portionu 98 riveted _ __ ` " ` ` into a 'short'.rockshaft Selby means >of rivets Ill!) thefshaftl5`3 isrockedlcounter-clockwise, as viewed . en in_Fig. 8 orfclockwise, as_viewedinlî‘ig. 9, Vas will / » the block> 91, may roclfgftoA a-jlimitedextent in a _begdescribeïdr more in detail hereinafter. The ` -lever?5l¿¿hasfïaljstud'shaft 5I .ñxed init which _ slot' VUlli formfedin a siiloportY block _102,'which `carries afreely rotatable cam roller 62 (Figs.` 8 » l serves'as a bearing .for supporting the rock shaft f , Vand-¿13) .i Y The cam roller VV62V engages a cam sur; 65 _9S_._.«The"cutting _knife assemblyjSAis similar in _ `face 63 formedV onalever 64,-_which is,~in turn», mounted upon-»a pivot. stud 65 attached Vto "an extending portion 66 of >thestandard»55.,"I1`he _ lerici-_63 is normally urged torock counter-clock- . - wiselFigs. 1‘1 and 13) by a compression spring F51.V seated _in Íafrvoclsetlìß (Fig.- 13) infvthe'standard 55.? Inf 'other words, ‘the `lever' v E53Y is normally urged to‘rock toîthe'left to clamp againstthe leg 'construction to theassembly k9,3,being supported on Va rock shaft I 03 and carrying back plates |04 andíl55~gf1‘he ~assemblies `93 and 94 are thus per-Y mitt'edto rock a shortdistance withrrespect to the„_support block 122m vorder ,that theymay properly alignr themselvesV with' the legs _Ztand „23,- respectively,yof the YU-shaped1V member 22;.on ïtheframefassernbly ISLY Theknife blade _9_6 is „of the iframe assembly I9 and hold it in- posi'- fr' Vprovided Swith. ‘a _ sharpened edge ILUG., _ which _is tion to »be worked upon, but will be cammed out 75 positioned tomthe'rlght (Figs. 5 arid '7) V(lf-.afgllide f ` 2,404, 180 _ projection |01. Similarly, the knife blade 951s provided with a sharpened'edge |08 lpositioned to the right of a guide projection |09. In the 6 |23, the lever ||| will travel in a straight line, and will guide the knife blades 95 and 96 into vengagement with the burrs formed in thel pre as indicated by the course of the knife blade 96 in Fig. 3 at the line |35. However, as soon as _the camming pin |31, in its circular ‘path of travel, v has passed beyond a horizontal position a short distance and after the cutting knife assemblies> 93 and 94'have moved across the legs 23 and 24 vious broaching operation. Since the blades 95 of the frame assembly I9, the camming pin V|31 operation of the apparatus, the guide edges l|01 and |09 will engage opposite sides of the leg-24 ' and 96 may not be moved with respectI to each will engage the bottom edge of the cam slot V|3|; other, but move as a unit, the guide projections 10 and >thelever || | and housing |2| will bevrocked |01 and |09 will guide the knife blades 95 and clockwise about the pivot mounting for the hous 96 into engagement with the edges of the leg 24 ing |2| and -the 'cutting knife assemblies 93 and 94 will then follow the path designated |40 (Fig. left to right, as viewed in Fig. 5.V TheV two knife 3) for-the knife blade 96. When the lever ||| blades 95 and 96 are held on the block 91 by means is thus moved through the circular path, as indi of a machine screw Y| I 0 and the supporting block cated by the line |40, the forward end thereof will |02`is fixed on the right end (Fig. 2) of a recipro strike the left Side (Fig. 2) of the lever |30 to . cable lever I I |. The rock shafts 99 and |03 are rock it about its >pivot pin |3| in a clockwise dì-` held in place in theblock |02 by backing plates rection untilthe spring |21 forces the lower sur ||2 and I I3 (Figs. 2 and 11) suitably attached face of the cam slot tightly against the camming to the block |02 which is, in turn, fixed to the 20 pin |31 toward the end of its travel back‘to the leverv I || by means of a pair of machine screws position shown in Fig. 2, at which time the lever l|4. |30 will slip 01T the right end of the lever | || and The reciprocable lever ||| is slidable in an os return to the position shown. . ' cillatable housing |2|, which is pivoted on an The shaft 32, as seen most clearly in Fig. 12, 25 upright |22-||22, in turn mounted- upon the base is journalled in a bearing |45 forming a part of 25. The upward movement of the oscillatable the standard 55and, in addition to the lever |38 housing |2| is limited by an abutment screw |23 mounted at its left end (Fig. 12), has a lever |46 threaded into a cross head |24 extending to the mounted at its right end. Each of the levers right (Fig. 4) of a standard |25, which is, in turn, |38.and |46 is forked, as shown at |41 and |48, suitably mounted on the lbase 25. The under 30 respectively, for receiving levers |49 and |50, surface of the oscillatable housing |2| hasa stud which .are pivoted on the levers |38 >and |46 by |26 set into it for retaining compression spring means of pins |5| and I 52. The levers |49 and |21 in lposition to bear against the underside of |50 are urged to rock with respect to the levers the housing and'urge the housing upwardly. A 35 |38 and |46 in a direction toward the shaft 32 guide stud |26 extending from the base of the by springs |53 and |54, which are attached to standard |25 serves to position the bottom end the levers |49rand |50 `intermediate their ends of the compression spring |21 and also cooperates and are attached to brackets |55 and |56, re~ with the stud |26 and abutment to prevent the spectively, which are, in turn, mounted by means housing |2| from oscillating beyond a predeter 40 of machine screws |51-¢|51 on flattened surfaces mined point. Extending upwardly from‘the base of the levers |38 and |46. At their free ends.. plate 25 is a bifurcated guide standard |29, which the levers |49 and |50 have stud shafts |58 and engages the two side edges of the lever„||| to |59, respectively, mounted in them, which carry guide the front end thereof. An L-shaped lever Vcam rollers |60 and |6I, respectively, in engage |30, pivotally mounted on a pin |3|, which is, ment with stationary cams | 62 and |63 fixed to ' in turn, mounted on a bracket |32, is normally oppositev ends of the bearing portion |45 of the urged to the position shown in Fig. 2` by a con standard 55. In addition to rotatably support tractile spring |33 attached to the lever |30 and ing the cam roller |60, the stud shaft I 58 ro to the guide standard |29. The amount of move tatably supports a pair of levers |64 and |65, ment of the lever |30 in a-counter-clockwise di which are urged to rotate counter-clockwise on rection about its pivot pin |3| is limited by an the stud shaft |58 (Fig. 8) by contractile springs abutment screw |34, which strikes the base 25. |66 and |61 attached thereto and to the lever as the cutting knife assembly 93 is moved from I The upper end of the lever |30 lserves as a cam ming 'surface for engaging the undersurface of the lever |||, as seen most clearly in Fig, 2L, to prevent the lever ||| from moving downwardly during a cutting operation of the knife blades |49. Similarly, the stud shaft |59 pivotally sup~ . ports a lever |68, which is urged to rotate clock wise with respect to the shaft |59 (Fig. 9) by a contractile spring |69. The levers |64, |65 and „ |68 are all of exactly the same construction and are each'provided with a projecting portion |10, v95 and 96 when the lever ||| is moved to the left, whereby the cutting knife assemblies 93 and to which their respective springs are attached, 94`wi11 trave1 in a straight une, as indicated by 60 and which Vengage pins |1| on their respective the line |35 (Fig. 3). The lever | |.|‘is provided levers |49 and |50 to prevent movementk of the with a cam slot |36 (Fig. 3) for receiving a cam levers |64, |65 and |61 .beyond the position shown ming pin |31, which moves through a circular in Figs. 8 and 9. Each of the levers |64, |65 and path to actuate the lever |||. As seen in Fig. 2, |68 have a notch |14 formed in them at their free ends, as shown in Fig. 9, ’for 1‘eceiving¿the the camming pin |31 rotates counter-clockwise, being mounted upon a primary lever |38, which files 90, 9| and 92, which are clamped in place is, in turn, iixed to the shaft 32 by means of a in the notch |14 by a clamping plug |16 attached set screw |39. The primary lever |38 being driven to each of the levers adjacent their hubs. ~ Y by the shaft 32 will carry the camming pin» |31 The cams |62 and |63, as will'be apparent from through a circular path'. In the» first portion of 70 Figs. 8 and 9, areof similar construction; the its travel from _the position shown _in Fig. 2- in a cam |63 being ’slightly larger than cam |62 since its associated cam roller |6| must direct the file counter-clockwise direction, the pin |31 will en 92 through a slightly different path than that gage the left >side of the cam slot |36 to slide the lever ||| to the left. „ Since the spring-|21 holds through .which the cam roller |60 guides the iiles the housing |2| up against the abutments'crew 75 80‘and9l. “ i ` 1_ " ' f ' 2,4044 so , 8 "7 pinV |31' ceasespto eífect' a downward thruston Vthe lever ||_|, 'atavhich time the spring |21`will start gto push the-'lever backup to the position ' `Á better understandingy of the invention will -be had ‘by4 reference to the following brief descrip tion of the mode of operation thereoil` A cross-v bar switch framea'ssembly i9, which is to have shownin Fig. 2.' > v ,i - Duringßthe second half cycle ofthe shaft 32, the 'filing portion ofjthe apparatus will become effective to‘file the breaching` burrs off the legsV 2l, 23"and~2ä', at YWhich=ti1r1e .the files 99, 9| and " 92 will, start from theV position'shown in Figs. 8 upper surfaceof the block 'l1l and where the lower lÜ and 9, which'is the vposition they occupy in ap edge of the frame 201wil1`engage the 'upper sur, proximately the last quarter of cycle of rotation face of the support rblock 15." The assembly.V i9 of the shaft 32. The fileswill be urged to retain 'may' be placed inthis position with the rear ledge the angular position »shownrin' Figs. Sand 9 as its legs 23,7724 and 2| treated to remove- the. broa’ching'burrs from them, may be placed in the Yapparatus by dropping it into position Whereïthe base/'of the U-shaped frame 22 will engage the Vofit engaging the face of the -fr'ameírnembers Y they travel upwardlyybutiof course,.theywill be 18 and 19 or may be dropped into `position where rocked about the stud'shafts |58 and |59 due to their engagement With.V the legs 2| ,` 23 and 24, the frame 20 `will rest against theclampmgpms . 51 and 58 and the handle 33 maythen be manip» Y and >they;willfthus „very >"slightly round olf the ulated to cause the single revolution _clutch 3| to corners ofthe leg'sj’and remove>v any burrs which might have been.v formed thereon. As soon as interconnect the shaft s2 Ywith theß seance. As Y ’the be operated shaft 32 tostarts supplyr to current'to rotate, thethe switch coil 35 36, at- s theistud shafts|58 and |59 beingguided'by their , tracting thefsolenoid coil V38k and reversing valve 40 from the fposition- shown. respective ofthe1vertical cam'rollers VportionVIBELand'IGI of the camsreach |62> and'|63, the top l WhenY the they will start to move away from the frame Y valve 46 is reversed, fluid under pressure will be assemblyV I9 clamped in the apparatus andas the shaft 32 completes its cycle of operation, will assume the angular'positicn shown in Fig. 2. `directed through the pipe lll through the valve E0 to the upper or rear end (FlgA) of theeylin der 42.Í When ñuid under pressureis supplied to What is claimed is: - the rear end of the cylinder 42, the pistonA rod ' I l. `A burr removing apparatus comprising a clamping means for holding an article, a knife 5B will be moved downwardly,_as viewed in Fig. 4, or to the right, as viewed 1n Figs. 2 and 8, 53 . therebyfto rock the lever 52 and .rock` shaft f u for cutting burrs from one Vporti'onof the article, a `íil'e for filing burrs from another portion of the article, a cam and vcrank shaft rotatable through a single cycle to cause operation of the clamping counter-clockwise. As the lever 52 rocks coun ter-clockwise, the lever> 55 will rock clockwise, shown inrFig». 9, and the clamping pinsv51 and means, the knife and the file, means on the cam 581will thereupon clamp the frame assembly i9 and crank shaft for imparting movement to the knife, and meansïcooperating with the means onk against the front surfaces of the frame members 18 and 1Q. When the lever V52'reaches the end'Y of its travel to clamping position, the clamping the cam andicrank shaft to guide >the knife inra rectilinear path Vandin an arcuate path. projection 84 will Vengage the'upper _surface Vof the U-shaped member 22 to clamp it against the V2. A burr f removingV apparatus comprising a upper surface of the support blockrl'lV and while 40 clamping means' forV holding an‘article, a knife for cutting burrs from lone portionrof therarticle, the lever 52 is moving to the position 'shown inl aille forïiiling'burrs from> another portion ofl FigLS, the cam roller 62 will roll downY the face the article, a-_ ca_m and Vcrank shaft rotatable of 'the cam surfaceY 63 on clamping lever '55, 1 through a single cycle to Ycause operation of the thereby shifting theY frame assembly |29 vto a clamping means, the -knife and `the rile, means proper position Ywhere the inner surface of theV . on the cam and crank shaft foi/carryingV thefiles through a rotary path, and a >stationary cam sur rounding theshaft‘for guiding the file. ’ ' leg 23 will bearagainst the right hand side (Fig. i 13) of the support block‘ll just prior to theV final clamping ofthe assembly I9 by the clamping ' _3. A ?burr `removing apparatus> comprising a projection 8è. This operation of clamping the assembly in position to be worked upon willY oc clampingr _means for'holding an article, a knife cur in the very first portion of the cycle of rota tion of the shaft 32 and as soonas the'part is Va fìle‘for'filingy burrs‘from another portion of clamped in place, the cuttingV knife assembles the article, a ?cam andv crank Vshaft rotatable for cutting burrs from one portion of the article, 93 and 94 will become effective due to the move through asingle cycle to cause operation of the ment of the reciprocable lever | || to the leftiun-Y 55 clamping means,rthe knife and the file, means der the action of the camming pin |31.Y nAs de on the cam and crank shaft for carrying the ñles scribed hereinbefore, the cutting knifevassem' blies 93 and 94 will folloWïthe path indicated’by curved and straight lines 'lá? Vand 4§35 1(Eig: :3) te, in the first half cycle of the shaft 32, cutoff any burrs formed along the side edges of theílegs 23 and 24.' In performing this operation, the lever ||| will be prevented from tilting clownA wardly due to the engagement of the undersur- through__ a rotaryv path, a stationary cam sur rounding'the shaft for guiding the ñle, and means tending to hold thefñle at a predetermined angle to the article.'_ , , -' ~ ’ ' - ' `4. KVAY burr removing apparatus comprising a ~ - clampingfme’ans for holding an article, a knife f Y faceïthereofV withY the .top surface of the lever t 13B' and, therefore,- the Y leverVV I| | will travelY straight toward the rear of the machine yinY a sub-` V stantially horizontal path; As soon as the cut ting 'knife assemblies have clearedV the legs 2l, for cutting burrs from one portion of the article, a ñlefor filing burrs from another portion of the article,a camand crank shaft rotatable through " Y a single?cycle to` cause operation> of the clamping Y means, the knife andthe ñlaand meansA mounted on thercarn and crank shaft >for resiliently sup,-` ‘ ` 23 and 24, the lever |.I Land the knife Vassemblies 70 porting the 4file with respect to thejcain and crank ¿ f willltravel through an arc,- as indicated bythe *Y Yline |40, the Ílower right »end (Fig. 2) 'of thel'ev’er 'Y Y| | |Y` having passed ofï'theupper surface lofithe shaftr, c » y ¿5. VA -burr Y -remoti/‘ing yapparatus comprising vaV clampingrmeansffor Aholdingv an article, ~ a knife lever ' I 30, will lthenY engage' the lever ' |36 'and rock - foncutting burrs ffrom‘one portion ofthe article, - it clockwise about the'pin |3| until Vthe Ycarnrm'ng av'vïijleïfor ñling'burrs from ¿another portion of the ' 2,404,180 ’ 9 i article, a cam and crank shaft rotatable through a single cycle to cause operation of the clamping means, the knife and the ñle, means mounted on the cam shaft for resiliently supporting the file with respect to the shaft, and a cam encircling the cam shaft for deñecting the knife eccen 10 ing means carried by said lever, camming sur faces formed on said lever for `engagexfnent by the pin, and means for guiding said lever in a straight line during part of the movement of the camming pin, said means being movable by the \ lever during another part of the movement of trically of the shaft. the pin to guide the lever during its movement 6. In a burr removing apparatus, a camming in a semi-circular path. pin movable in a circular path,r a slidable and 8. In a burr removing apparatus, ~a cammlng oscillatable lever driven by said pin, burr remov 10 pin movable through a circular path, a slidable ing means carried by said lever, and means for and oscillatable lever having camming surfaces guiding said lever in a straight line during part for engagement by said pin, means for urging of the movement of the camming pin, said means said lever to follow a predetermined straight path being movable by the lever during another part and compressible by said lever during a portion of the movement of the pin to guide the lever 15 of its travel under the action of the pin to guide during its movement in a substantially semi an end of the lever in a semi-circular path, and circular path. burr removing knives carried by said lever. 7. In a burr removing. apparatus, a camming pin movable in a circular path, a slidable and JOHN W. KING. oscillatable lever driven by said pin, burr remov GEORGE STUHLFAUTH.