Патент USA US2404146код для вставки
July 16, 1946. _ ' H. M. SCARFF' PISTON RING 2,404,146 SLOTTING MACHINE Filed Aug. 16, 1944 R311. — V _ ‘ I 5 ~Shee1'.s-Shee’o 1 ' Lnuenfor; ; HowoMl‘TScarff ‘B3 .—-——_ I Qq/ July 16, 1946. I H_ M, ‘SCARFF: Q ‘PISTON RING' SLO'I‘TING MACHINE. Filed Aug. 16, ‘1944 7 2,404,146 ' ’ '5 Sheets-Sheet 2 Vigi IhuenToh vHarold Mboarff .BgWw July 16, 1946. H_ M SCARFF ~ 2,404,146 PISTON RING SLOTTING MACHINE Fiiled Aug. 16, 1944 _ s Sheets-Sheep s m I I If '7’ i? "4 [Z? n A? 1"‘ _ . B5 MQL ~ Harold MScarff July 16, 1946. HY M, SCARF} ' ‘2,404,146 PISTON RING SLOTTING MACHINE ’ 4 Filed Aug. 16, 1944 I 5 Sheets-Sheet 4 I _- 89 v14 Inuenfor Harold M. Scarff I Juiy 156, 1946. H. M. scARFF ' ‘2,404,146 PISTQN RING SLOTTING MACHINE Filed Aug. 16, 1944 135 . > ' 5 Sheets-Sheet 5 v . '34 Z0 15 94 ‘93 / I 90 9] 9 95 a9 40 / . Inuér?’or " Patented July 16, 1946 2,404,146 UNITED» STATES PATENT _ OFFICE Q “Harold M. Scarff, Muskegon, Mich., assign'or to . Muskegon Piston Ring Company, Muskegon, - Mich., a corporation of Michigan Application August 16, 1944, Serial No. 1549.707 6 Claims. (01. 90—.—15.1) 1 - vThis invention relates to a piston ring slotting machine- Piston rings used in the lower groove or grooves of pistons in internal combustion en 2 ' , r 1 tion, showing the mounting of one of’the ring arbor carrying units and the manner in which the ring arbor and rings thereon'are detachably con-: gines are in many cases provided with slots cut by saws, such slots being located between the 5 Fig. 7 is a fragmentary horizontal section opposed ?at sides of the rings and extending their . through a "piston'ring' showing the-manner in outer curved bearing faces to the inner sides which the slots are cutltherethrough, and ' ' thereof. The slots are, spaced from each other Fig. 8 is a diagrammatic view of the‘el‘ectrical around the ring and in the circumference of a controls used in connection with the machine. ring a plurality of the slots are cut, the number .10 Like reference-characters refer to like parts .in of which may vary. ‘The present invention is di ‘the different ?gures of the drawings. nected. rected to a machine by means of'w'hich a num ber of piston rings may be simultaneously slotted, ’ ' " ' ' ‘The machine has a supporting cast frame I from the upper rear portion of which a sleeve 2 one slot after another, until all of the slots in extends upwardly. At the front the frame has a ring support and guide 3, within and below which is ‘a vertical vsleeve '4 (Fig. 2) ,‘ for the time of removal and replacement a second plu mounting and support of a turntable 5._ The rality of rings be undergoing the slotting process. turntable has a downwardly extending vertical This provides a very rapid production machine stem 6 passing substantially‘ithrough and rotat-' and one with which the slotting operation is per 20 able in the bearing provided by the sleeve 4 and the rings ‘are completed, the processed rings re moved and replaced by others, and during such formed rapidly and accurately so that with the machine and‘one operator, therefor, large quan tity production is obtained at low cost. at its lower end a retaining plate 8 is detachably connected as shown in Fig. 2.- The table at its upper ‘peripheral portions has an outwardly ex- , Another feature and object and purpose of the tending annular ledge '! resting upon and movable present invention is to provide the machine with 25 over the upper edgesof the ring 3. (Fig. 6). The at least two slot cutting or sawing units either table at its upper side is provided with a plu of which may be used in slotting the rings. The rality of upwardly extending handles 9‘ which other is idle and is conveniently located for access may be grasped to turnthe table about its vertical so that the cutting saws may be sharpened or re axis of movement. placed if necessary, the work which the ma 30 The ‘turntable .is adapted to occupy two posi chine is doing not being interrupted. This tions and be releasably held in such positions. A makes it possible for the machine to be contin locking bolt It (Fig. 4) is normally pressed out ued in production operation all of the time with wardly by a spring H to enter an opening l2 in out need for it to be idle in the event that a saw or saws have teeth broken therefrom or- become dull and need resharpening. ' Many other novel constructions and useful ‘re sults coming therefrom will be apparent upon an understanding of the invention had from the fol lowing description, taken in connection with the accompanying drawings, in which Fig. 1 is a side elevation of a machine ‘made in accordance with my invention. Fig. 2 is a vertical section and ‘partial side ele vation, the section being on the plane of line 2—-2 of Fig. 3. V Fig. 3 is a horizontal section substantially-on the plane of line 3—3 of Fig.2, looking in a down ward direction. Fig. 4 is a .fragmentary enlarged vertical sec tion on the plane of line 4-4 of Fig. 3, looking in the direction indicated. Fig. 5 ‘is a horizontal section on the plane of line 5—'5 of Fig. 2, lookingin a downward direction. ' the underside of the ledge "I, said bolt It being ' mounted vertically underneath the ledge on the support 3. There are two of the bolt receiving openings [2 (Fig. 3) thereby governing the two positions in which the turntable is held. The 40 bolt is manually retracted by means of a short horizontal stub shaft I3, having gear teeth at its innerend and engaging with a rack atone side of the pin l0, and with a handle l4 connected with the shaft for manual operation to retract the 45 bolt and lift it out of the recess 12 with which it is engaged. At diametrically opposed places on the table vertical openings are made therethrough forthe mounting of two sleeves [5 which are rotatable 50 therein'and which are ?anged at their upper ends to bear against adjacent upper portions of the turntable. At the lower end of each of the sleeves IS an indexing wheel It is permanently secured, provided 'at its periphery with spaced ' Fig. 61'is a fragmentary enlarged vertical sec .65 apartlradial vnotches I‘! (Fig. 5). A pin I8 is 2,404,146 3 j extends below the lower side thereof. In the upper end portion of the sleeve I5 a ver 1‘ tical stem 19 of a ring‘holding arbor is adapted } to be inserted. At the upper end of the stem a ?xed collar 25 is formed as a part of the arbor, . being notched‘ at its lower side to engageewith a 1 key 2| at the upper end of the sleeve ‘l5 to hold the arbor against rotation withrrespect to the 4 31, and'extends below it, the axes of each of said shafts being offset from the axis of its associated shaft .38. Each saw arbor shaft at its lower end carries a plurality of thin saws 4|, spaced from secured to each oftheindexing wheels l6 and each other, there being one of the saws for each of the rings 22,, carried by a ring holding arbor. . It is, of course, to be understood that the saws ' 4| are releasablyv connected with their arbor I . shafts 40. the detail not being shown as it is old I and well known. The saw arbor shafts 40 are ‘ sleeve J5 on which it is mounted. Above the col-f .10..‘. driven bytheshaft's 38 through gearing indicated ‘ lar-20 a plurality of piston rings 22 which are .to at'42, in Fig.2. be'slottedare located in superimposed relation . ‘,f and closed and aclamped removable betweenwith the ring upper their collar parting's'Iat. side 24. ofithe’collar A stem onefside '23 ex2i) . . V . tends'upwardly from the collar 24 through the l piston rings and is provided at its upper end por- “ ’ ,An'elect-ric motor 43 is supported on a suitable bracketsupport 44 'at the upper side of the sup porting. casting I, the shaft of the motor being - equipped. with?‘ a grooved driving pulley 45, around which‘ and theadjacent pulley 36 end , tion with a slot to receive a key 25 therethrough I f less lbelts 45 are adapted to be, placed for driv ing the saws continuously, that’is, the saws on 1 which bears with a considerable wedging force 5 1 against "the upper side ofi'the collar 24 tohold 20 one arbor shaft 43. .‘One, of the pulleys, asshown " in Figsl, will be driven and the other idle. But ‘ the rings'in closed clamped position. ; The struc when the, pulleys and saws are interchanged in ture of the arbor need not'ibe entered into in de-" . position, as later'desoribed, the belts 46 are re '; 'tail as it is shown in the pending application, 6 moved from the pulley 36 which has been driven 1 -Serial.No;§503,097,' ?led September 20, 1943. I, and are placed around the other pulley 36 for the 25 . 131 The stem il9'near its'lowerend has a notch or .driving of itand the slotting saws 4| associated recess 26in a' side'ther‘eof in which the upper ' 1. iendiof?a spring ‘actuated retaining ‘dog 121, is therewith. adapted ‘to belreceived to releasably retain the 3 arbor inplace; i. The vdog2'i is pivotally mounted between its ends and at its lower endis provided with‘ an 'angularly‘ disposed tail piece, as shown " V in Fig.6: VA rod 28 passes freely upward through ‘ , , v 7 From each of the housings 31, upper and lower ‘arms » 4T extend outwardly :(Fhgs. 1 and’ 2), through which a shaft 48 extends. A pinion-49 is'at the lower end of the shaftjbelow the lower - arm 41, and'the‘ upperend of the shaft is shaped ' to receive a wrench for turning it. A curved arm’ 1 théindexing'wheellB and the lower part of the ‘sleeve 15, andhas a beveled :upperpnd bearing‘ 7 56- is adjustably mounted at a side of eachhous 31; below the lower arm 41 on suitable ways ‘against the inclined lower side. of the tail piece‘ 35 ing 5| (Fig. l) with bolts as shown for securing the 'offthe‘dog 21'." A lever29 is pivotally, mounted arm in any position to ‘which adjusted longitu between'its' ends on a bracket 36 depending from dinally of said ways. The adjustment is effect ‘ ”th€JSlIpp01‘t,/3; andyat its inner end Nils-Provided; with a‘?projection g3! :whichbears againgst‘the ' ed by releasing the bolts and turning the shaft v43, each arm being I provided with rack teeth 7 lower end of rod 23. -. A downward push upon the" ‘outer end of, rod 29 (Figs. 2 and ,6) moves the rod 1, »23 upwardly; and shifts the, dog 21 toa position :to release the arbor so that it can beeremoved.‘ (Fig. 3) with which an associated Pinion 43 en--' gages. Each arm at its free end is provided .with "a roller 52. Two tension springs 53 are connect~ ,» ' each at one end to the upper sleeve extension ,Qn replacing an arbor which has been removedi 45. ed 34, and at their opposite ends to rods adjustably with anew arbor loaded with unslotted piston through lugs 54' projecting from the ‘rings, the lower‘end' of ?the'stemr l9 engages vthe extending housings 3?. Said springs 'under‘tension' nor-, I hupperend portion‘ of the dog 21, pressing ‘at its .mally tend to pull the housings in a clockwise one sideuntil notch 26 hasreached a‘ position to receive the upper‘ end of the dog, it being" 60 idirection'(Fig. 3) about the axes of the shafts 38 and pins 39.‘ V moved into retaining position ‘by the spring‘act ingthereon. ' '" ‘ ' ' " ' M'The’ sleeve 2 of the main ‘supporting frame . casting receives within it and provides a bearing r ‘The unit described and which ismounted upon the central sleeves 32, 34 with their outwardly . extending arms 33 and 35 may be turned as a whole aboutthe vertical axis of the sleevepor 'for‘a. downwardly'extending sleeve 32 (Fig. 2) 32 which is'within the bearing sleeve 2, and ~fronithe upper part of which oppositely extend 55 tion be held inv either of two positions by a spring, ‘in‘g horizontal arms 33 project. Above the arms the ‘sleeve is extended as shown at 34 and imme diately over said arms said sleeve is slotted at actuated lock bolt 55. In one position one gang . of saws will be over the inner portion of the turn table 5 and will be driven by the motor 43. The opposite sides (Fig. 3). The upper end» of the other gang» of saws will be diametrically opposite sleeve is closediby a head 35, likewise having 60 and back of the main'supporting casting I (Fig. oppositely extending arms, adjacent the'outer 2) accessible for inspection, repair, removing‘ ' end of each of which a belt pulley 36 (preferably and replacement. 7 g . . jgrooved as shown, Figs. l and 2), is mounted for The rollers 52 drawn inwardly by springs 53 rotation. Between the ends of each pair of arms 65 pass through the slots in the sleeve extension 34 33 and35 a housing'3l of the form shown in (Fig. 3) and normally bear against a cam 56 3 is located. A shaft 38 connected with each ibelt} pulley 35 extends downwardly through the ’ arms of the head 35 into'eachhousing 31. 'The ’ vertical axes of shafts 38 are coincident substan .st the upper end of a vertical shaft 51 which extends through the lower sleeve 32 and is',r0 tatably mounted at its lower end on a horizontal tially with‘ the axes of'pins 39 (Fig. 2) projecting 70 portion la of the main casting frame (Fig. 2). The unit which is idle may be held at an ‘outer :upwardly from ‘arms 33. The pins. 39 extend - position in any suitable manner so ‘that the spring . . “jinto openings in the ‘lower sides of the housings 53 associated with it is maintained ina stretched condition, with the roller 52.,.out.o_f‘ engagement :lcommon vertical. axes of shafts38;and~pin.s 39. '7 5, with the cam'56 as shown inFig.' 3; ’With‘a roller A saw arbor shaft 40‘ is mounted in each housing i 3150' that, said housing may be rocked about the 2,404,146 15 , 6 52 bearing against the edge of cam 56 and with ‘shaft 51 continuously rotating, the housing 31 with which'such roller 52 is associated is rocked back and forth' about ‘the axis of the shaft 38 so that the saws M are moved back and forth with ‘such rocking movements. ~ - Shaft 51 carries a worm wheel 58 driven by a worm 59 on a shaft YGZK‘Figs. 2'and 5). In align ment with the shaft.v '6'2is a second shaft (not g 7 from the full "line to dotted line position shown in Fig.- 55, ‘the member 81 is lifted to a position above a'switch lever>89 (Fig. 1)., the member'f88 pass ing thereby, whereby ‘when it is released and the weight‘ of the member 81 causes it-to return to its . initial position, the lower side o‘fthe'part 88 en gages the switch lever '89 to turn it as is evident, said lever'89 returning ‘to initial position after release. _ ~ > v numbered, Fig. '5) having a pulley driven by ‘a 10 ~ The‘ switch lever 89 is a part of the control belt 60 which in turn is driven by an electric mechanismfor the clutch 83 for its connection motor 51 mounted at the back of the machine. ‘and disconnection through a ?uid pressure oper Between ‘the shaft 62 and its aligned ‘shaft is a ated cylinder and piston 90 and 9|. --Said cyl clutch 633 (Fig. 5) so that vthough the motor ‘6| inder 90 is located at the back of the machine may be'c‘ontinuously operating, shaft 62-is driven 15 (Fig. 5) and the piston rod connected with a only whenithe clutch ~at~63 vis connected. The index wheel 16 of the-sleeve l5 which car ries a loadedarbor of ring's- which are to be ‘acted ‘upon by the saws hasfa locking dog 64 engaging lever ‘92, the movement of which shifts the :mov-é 'abl‘e member of clutché?3- into or out of ‘engages. _ ' ment with the drivenicliutch members. Cylinder .90‘ (Fig. 8) has pipes 93 leading to oppositeends successively in the notches ['1 to hold the sleeve 15 and the rings associated therewith from rota tive movement while the slotlsawing takes place. thereof, which pipes'Y-are connected with'a’lvalve The dog 64 is guided in ‘a sleeve guide 65 (Fig. ing '94 is a valve which selectively openseither . housing 94 to which a ?uid pressure ‘medium’ is conducted ith'roughr‘a pipe 95-. Within the house 5) and normally pressed outward by a spring 66. of the pipes 93, at the-same time closing the 'Allever 51‘ is pivotall'y'mounted between its ends 25 other. Associated therewith is- a- housing. ‘96. and connected with the dogat one end, the other which carries an-electrical appliance, for exam-' endcarrying a roller 68 bearing upon a collar 'ple, a solenoid construction connected withfthe ?l?xe‘d on and rotatable ‘with shaft'51 and which valve,- with electric wires ‘91 in one of which a has a, projection 10 at one side, so that with each manual switch 98 is interposed, vand other wires rotation of the ‘shaft 51, lever 61 is actuatedto "99 in which the switch'controlled by the ‘leverl89 withdraw the locking dog 64 from a notch H in isinterposed. The detail'of this construction 3is the index wheel 16 with which it has beenyen not set forth as it is not in itself new and is gaged, as shown in Fig. 5. . A second cam 1| (Fig. 5) is secured to the known to those skilled in the electrical-?eld. - ' In operation, with the motor 43 continuously shaft 51 below the collar 69 bearing against which 35 running, therefore driving the “saws 41 at the is a roller 12 mounted between the ends of a lever arm 13 pivotally mounted at one end on a front of the machine‘;"and with the motor ‘61 continuously running but with clutch 63 discon 'nec'te'd, an arbor loaded with rings 22 is ‘moved lug 14 extending inwardly from a side of the main supporting frame I. vA rod 15 passes freely into processing position as indicated'in dotted through the other end of the lever arm 13 and 40 lines inFig; 1. The switch at 98 is manually has nuts at its outer end between which and the closed which effects a now of liquid pressure to arm 13 a coiled spring 16 is located. The oppo the proper end of the cylinder 90 to move the site end of the rod 15 is pivotally connected to piston and the rod 9| and connect the clutch at the outer end of an 'arm 11 which, as shown in '63. When this occurs the rotation of the shaft Fig. 2, is located below a part of the main cast 45 51 causing a turning of cam 56 (Fig. 3) moves ing support and is connected by a vertical shaft vthe operating housing 31 and with it the oper 82 ‘with a second arm 18, the two arms 11 and 18 ‘ating saws 4| toward and into sawing engage providing in ‘effect a bell crank lever. A tension ment with the rings 22 to cut one of slots I00 spring 16a (Fig. 5) acts upon the arm 11 to nor (Fig. '7) in all of the rings 22. With a con mally pull it to the left. At the outer end of 50 tinuation of movement of cam 55 and when the ‘arm 18 a spring actuated ?nger 19, ‘with a dog roller 52 reaches the proper position on said 80 thereon projecting laterally, is pivotally cam, the spring 53 which has been stretched mounted, the spring acting to turn the arm ‘withdraws the housing 31 and the saws associated clockwise (Fig. 5) for the ‘dog to ride against the therewith. I peripheral edge of the index ‘wheel [6 and at 55 During this time that such withdrawal has times enter the notches l1 therein. The dog is taken place the projection 10 ‘on the collar 69 limited in its movement by an adjustable stop comes to the roller 68 and operates lever 61 to provided by the screw 8| (Fig. 5). withdraw the locking dog 54 to the position shown -A ?nger ‘83 has its free end portion normally in Fig. 5 and thereby release the indexing wheel interposed in the path of movement of the pin l8 60 with which it has been engaged. The cam 11 extending downwardly from the inner index moves to release the lever arm 13 which will wheel l6. Finger 83 is secured at its opposite end then permit the movement of rod 15 and lever to a short vertical rock shaft 84 between which 11 by spring 16a counterclockwise (Fig. 5) so and a, horizontal shaft 85 extending through a that the dog 80 will move in a counterclockwise side of the machine gearing connections, as indi 65 direction about the indexing wheel I6 from one cated ‘at 85, are interposed, whereby the move notch [1 to the next one and upon cam 1| mov ‘ment of the ?nger 83”»from its full line to its ing still farther so that it draws the rod 15 and dotted line position shown in Fig. 5 rocks ‘the arm 11 to the right (Fig. 5) the indexing wheel shaft 85 a limited distance. At‘ the outer end of 1 will vbe moved one step to bring the next succeed the ‘shaft 85 a sector-like weighted block 81 is' 70 ing notch in position to be engaged by the re secured at the curved edge of which a spring leased dog 54. ‘actuated ‘member '88 is pivotally suspended (Fig. This operation is repeated until the indexing ‘ 1). ‘When the pin 18 ‘engages ‘against the ?nger wheel has made a complete revolution. With v'83 in the movement of the indexing wheel 16 to each repetition the position of the rings 22 is which the pin is connected‘ and-moves said f?nger "Pch‘anged so that succeeding slots. I00. are’ cut 25404, 146. through theri'ngs until the ?nal/slotis out which vertical driven shaft extending ‘into, and partly 5by the arbori; It is at this time that pin l8_'oper_ iates'against the, ?nger 83 and, moves theswitch ‘lever 89: as previously ‘described, causing'a change Qof the position of theifluid pressure control valve and the reversal of the ?uid pressure movement of the shaft, twoyhousingsmounted on vsaid sup port, for rocking movement-each about a vertical aXis, a cam follower on each housing to bear ‘;completes the process on all of the rings carried , I through said support,'a~cam at theupper end ‘ against said cam, a saw arbor- shaft mounted to turn about a vertical axis carried by‘ each hous _ ing and, extending therebelow, each‘ saw arbor ‘to the opposite end'of the cylinder 90, the piston at its lower portion carrying a plurality ovflspaced‘ connect the clutch 63 and stop the machine when 10 horizontal saws; said arbor shaft being; offset from the, axis ‘about which the'housing is rocked, ‘a plurality of the ring castings havebeen com andmeans'for driving said saw arbor shafts,’ said driving means being in a ?xed position and adapt? , 'The turntable‘5 is then‘ireleased by; pushing ‘rod 9| ‘in its return movement operatingto'dis- - ' rpletelyyprocessed. - ‘Y 1 ‘ : J‘ ' ‘ ‘ ' down upon the handle I4 and is turned through ‘ 'ed to drive one ofsaid saw arbor shafts when 180°,§as indicated by the arrow in Fig. 5, to bring ‘the arbor‘loaded with unprocessed rings,‘ which previously was ,at, the- front of' the-turntable, into position to be slotted.‘ The switch at 98 is manuallv closed and the clutch 6,3 reengaged for repetition of the cycle described- While the sec ond plurality of rring?castings is being slotted, said support ‘is intone position andjthea other of’ said saw arbor shafts when the support is; turned about a vertical axis to another position. * ~ o _ ‘3. A constructionhaving theelem'ents de?ned in claim ,2,‘ and means for mounting: a plurality 20 of horizontally located piston ,ring »castings_,;in superimposed , relation one i against the, Obheriand clamped together in a'position for engagement'by ' .those ‘which have been processed are removed by the saws of the driven saw arbor shaft, saidsaws manuallyoperating lever 29 to free the arbor of being moved inwardly to'saw>;s1ots throughthe 1processed " rings, it being replaced“ by another 3 arbor, loaded withunprocessed rings. Thisoper-r 25 piston ring castingsv and then outwardly to ,dis engage therefrom through the rocking of the ~‘ ation ,_ is ‘repeated. inde?nitely, it being ‘neces housing which carries said shaft controlled’ by saryfor thev machine operator ‘merely to remove said cam, and means controlled by said ?rst-men the arbors carrying processedrings and replace tioned vertical shaft for periodically turning said with arborsloaded‘with unprocessed rings, vun ‘ilock and turn the turntable between the succes- 30 piston rings about a central vvertical axis a pre selected distance at the times'that th‘e'saws have jsive automatic stoppings of the machine, and been moved away from said castings.‘ . p 4 ; close the switch for connecting clutch 63 at‘the , 4. A construction having the elements de?ned ‘ 1 times, after the ‘machine has been stopped to in claimZ, and means for mounting a plurality 1 cause it to again operate; " r _The construction described is practical and 35 ‘ effective 1 and with it in practice, very high quan ‘ tity production of the slotted. oil rings is obtained. unprocessed rings vandthe,otherstagethe place ‘ r P atwhichthey are slotted; provide‘s‘for a rapid ‘ 3 continuous quantityzproduction. vThe invention » "piston ‘rings'about a central vertical axisoa pre 1 has proven'very successful in practical opera selected distance at the times that the saws'have been moved away from said castings, combined tion. It is de?ned in the appended claims and “ is to be considered comprehensive of all forms with means for automatically stopping said verti '1» of structure coming within their scope. ' j , i . superimposed relation one against the other and clamped together in a position for‘ engagement by being moved inwardly .to saw slots through the piston ring: castings and then outwardly to dis engage th'er'efrom, through "the rocking of :the housing which carries said shaft controlled‘by' said cam, and means controlled by said ?rst men tioned vertical shaft for periodically turning said 1. turntable havingtwo stages,’ one for loading with Iclaim: of horizontally located piston ring castings in the saws of the driven saw arbor shaft, said saws ' 'As previously mentioned no stopping of the ma 1 chine operation is required for reconditioning i of the slotting sawskorv -their,_replacement. ' The ~ i ' , 1. In a machine of the class described,~a hori cal driven shaft from rotation after saidpi'ston ' to rings have been turned by s‘tepby ‘step ‘move I zontal substantially. ring-like support, a ‘hori ments so as to saw a plurality of equally spaced ‘ zontal, turntable mounted within: said support and‘ extending over the upper‘ side and bearing slots'throughsaid'rin‘gs 'therearound. 1 thereon, means for mounting said turntable to ing, a support, a second ‘support mounted‘ on the ‘?rst support'to ‘be turned about a vertical axis, ‘ turn about a vertical axis, two sleeves‘ rotat r 7' _ A machine for slotting piston rings compris substantially diametrically‘ opposite 7 1 ably mounted upon and“ extending vertically through said turntable inside‘ said ‘support, a housings 1 of thefdog, a rod in each sleeve having 'a- cam ‘ ' upper end ‘mounted lengthwise of the lowerpor- ‘ . horizontal saws‘, a driven shaft mounted vertical- » ‘each other, each mounted upon the‘second sup piston ring carrying arbor having a downwardly » port to rock about‘ a vertical axis spaced from the axis of the second support, ‘a'vertical saw arbor f extending stem to pass into the upper end por tion" of ‘each sleeve, said jstem having a notch 60 shaft mounted on each housing and extending'be low it, each saw arbor ‘shaft at'its lower end por in a side‘ thereof, a spring ac‘tuated‘dog mounted tion being adapted to carry a plurality of spaced 'on each sleeve to enter said notchf at one end 1 ly in each'housin'g and about the axis of which tion of ‘.s‘aid‘sleeve and extending therebelow, 65 the‘ housing is rocked, driving connections be tween said‘ vertical shafts and the‘ saw varbor said dog at its lower end having a cam edge to ‘ engage the 1camend‘ of the rod, a lever pivotally » shafts, a‘;v driving means mounted upon the ?rst support adapted to‘ have selective connectionjwith mounted‘between its ends and-carried by said ; ‘support at one end, extending'underneath either of , .sa‘id. vertical shafts,ione at a timejsaid second 1 said rods in a, predetermined'p‘osition of the turn ‘ .‘sup‘port beingturnable‘ ‘about itsvertical axis’ of’ table, whereby one of said rods may be 'moved up‘ ‘ iwardly ‘on operation of the lever to disengage said 'rotation tolvbring either jofssaidshafts into po- ' s'ition for connection with thedriving means, a driven vertical shaft mountedupon the ?rst sup j. 2. In"a;machine.ofitheiclass:described;alsupg h 'port and extending into thesecondsilppertilav- do'g‘fromfs‘aid arbor stem; f ;_port'.-'mounted to turn: about ‘a; vertical: axis,‘:a:75' ‘ing ‘an axis substantially; coincident .iwith itheiver 7 2,404,146 tical axis about which said second support is turn-, able, a cam on said last mentioned shaft, a cam follower on each housing adapted to bear against the cam, and means normally drawing said roll ers into engagement with the cam, whereby on ro_ tation of the last mentioned shaft a housing is rocked to shift the piston of the saw arbors and the saws thereon. ‘ 6. A machine for slotting piston rings compris 10 tation to bring either of said shafts into‘ position for connection with the driving means, a driven vertical shaft mounted upon the ?rst support and extending into the second support having an axis substantially coincident with the vertical axis about which said second support'is turnable, a cam on said last mentioned shaft, a cam follower ' on each housing adapted to bear againstthe cam, means normally drawing said rollers into engage ing, a support, a second support mounted on the 10 ment with the cam whereby on rotation of the ’ ?rst support to be turned about a vertical axis, last mentioned shaft a housing is rocked to shift housings substantially diametrically opposite each other each mounted upon the second support to rock about a vertical axis, spaced from the axis the position of the saw arbors and the saws there-, on, a vertically positioned piston ring arbor hav . ing a plurality of piston rings located horizontal of the second support, a vertical saw arbor shaft 15 ly thereon in’ superimposed relation, rotative means for carrying said piston rings to a position ' mounted on each housing and extending below it, each saw arbor shaft at its lower'end portion be- _ to be processed by the saws'on rocking movement ing adapted to carry a plurality of spaced hori of the housing carrying them toward adjacent zontal saws, a driven shaft mounted vertically in sides of the piston rings, said saws disengaging each housing and about the axis of which the 20 from the piston rings on continuation of the rock housing is rocked, driving connections between ing movement carrying them away from the pis said vertical shafts and thesaw arbor shafts, a ton rings, and means to turn said piston rings a driving means mounted upon the ?rst support predetermined distance to present another portion adapted to have selective connection with said of said rings to the saws, said turning occurring vertical shafts, one at a, time, said second sup 25 when the saws are away from the rings. port being turnable about its vertical axis of ro HAROLD M. SCARFF.