Патент USA US2124347код для вставки
July 19, 1938. w. F. GROENE El‘ AL 2,124,347, CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 1957 ' 1ov Sheets-Sheet 1 138 137 B343 132 ' 13s 131 150 IA... _ BY , INVENTOR. WILL/HM F. GROENE Ross M.BHCON ATTORNEY. July 19, 1938- w. F. GROENE ET AL 2,124,347 CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 1957 u- *“v 8 10 Sheets-Sheet 2 1 :t INVENTOR. WILL/HM F. GEOENE BY Ross M1 BACON I ATTORNEY. July 19, 1938. ' ' ‘ w. F. GROENE El‘ AL 2,124,347 CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 19:57 ' 10 sneéts-sheet 5 AB CARIGE TRAVEL A ‘B CARRIAGE | ‘INVENTOR. WILLIHM F. GEOENE .BY'KQLIWMS. ATTORNEY. July 19, 1938. w, F_ GROENE' Er AL 2,124,347 CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 1937 ' l0 Sheets-Sheet 4 ZOE' STAR STOP I’I6UTOMA [I | | ' ‘4* w ' ‘ ‘ INVENTOR. WILL/HM F. Grace/v5 Ross M. BACON ' ATTORNEY. July 19, 1938. F. GRO‘ENE ET AL ' 2,124,347 CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 1937 ‘10 Sheets~Sheet 5 95": Nm v ‘ BY - INVENTORV WILL/RM F. GROENE g‘1205.5 M.Bnco~ ATTORNEY. July 19, 1938- w. F. GROENE ET AL I CENTER DRIVE CAMSHAFT FIATHE Filed Jan. 21, 1937 2,124,347 I 10 Sheets-Sheet 6 51 // l 15o FIGEI 211 INVENTOR. \ WILL/m FGROENE Ross M..BHGON ATTORNEY. July 19,. 1938. - w. F. GROENE ET AL 2,124,347 CENTER DRIVE CAMSHAFT. LATHE Filed Jah. 21, 1957 10 ‘Sheets-Sheet 7 mi IN 55 . 2m July 19, 1938- W.VF. GROENE ET AL ' ‘2,124,347 CENTER DRIVE; CAMSHAFT LATHE Filed Jan. 21, 1937 10 Sheets-Sheet 8 In 5’ " BY INVENTOR. , MILL/am F. GROENE Ross M. BHGON ‘ATTORNEY. July 19, 1938. . ' w.- F. GROENE ET AL CENTER DRIVE CAMSHAFT LATHE Filed Jan. 21, 1937 3 " ‘ 10 Sheets-Sheet l0 k3 l r 2,124,347 l FIQXHI I lI LS-C ao1— INVENTOR. ‘ WILLIFIM E Groane Ross Mbncov ATTORNEY. I 2,124,347 Patented July I9, 1938 ._UNITED_ STATES PATENT OFFICE 2,125,347 _ . CENTER DRIVE CAMSHAFT LATHE William F. Groene and Rose M. Bacon, Cincin nati, Ohio, assignors to The R. K. Le Blond Machine Tool Company, Cincinnati, Ohio, a corporation of Delaware ' Application January 21, 1937, Serial No. 121,510 17 Claims. Our invention pertains to center drive lathes adapted to chuck and rotate relatively long shafts, axles, and the like, intermediate the ends thereof so that machining operations may be (Cl. 82-—19) ' . N . fully automatic mechanism for relieving the turning or longitudinally feeding tools from cut ting position during' the return travel of the tools to initial starting position, the purpose of which is to prevent scoring of the work surface 5 undertaken simultaneously and with a single _ < i 1 chucking operation on the major portion of said already turned. We also contemplate providing a manual workpieces. More particularly this invention means for operating the tool carriages and a pertains to a lathe adapted to machining hear safety device in connection with said operating ing and other surfaces on camshafts for inter means to prevent surprise operation of the rapid 10 nal combustion engines. 10 traverse motion of the carriages and possible ' Prior to our invention camshafts for multi injury to the operator. cylinder internal combustion engines were chucked and rotated intermediate the ends of the camshafts but tools were applied to ma 15 chining only one end of the work, the work later claimed in application Serial No. 108,039, filed 15 Oct. 28, 1936. Further objects will appear in the course of the following description of the drawings in being rechucked in another machine to complete the other end of the work. Because of the rela tively frail nature of such a camshaft it has long been considered impractical to attempt to simul taneously machine both‘ ends and intermediate portions of said camshafts by a ‘single chucking operation in a single machine. ' In connection with this lathe we prefer to use a. chucking device of a character disclosed and which: - ' _ Figure I is a perspective view of'the front of 20 a lathe incorporating the principles of our in vention. Figure By our inven 11 is a perspective view of the rear of tion we have greatly increased the e?iciency of the art of camshaft turning in that we have ‘the lathe shown in Figure I. Figure III is a plan view of the intermediate 25 25 combined the former two operations into a single operation thereby e?'ecting' great savings ‘ in portion of the lathe showing the relationship equipment, handling, and in producing more ‘of the ‘work, the chucking mechanism, and the accurate and greater quantities of the ?nished \ cutting tools as applied to simultaneously ma chining all the bearing portions and related sur shafts with considerably less effort. faces on a camshaft for a multi-cylinder inter 30 ‘An object of our invention is to provide a lathe whereby turning operations may be undertaken ' nal combustion engine. - Figure IV is a plan>view partly in section on on the ends and intermediate portions of rela tively long, slender work pieces. line IV-‘IV of Figures VI, VII, and VIII, show ing the main driving mechanism for rotating . Another object of our invention is to provide the work holder and the power takeoff for the 35 35 a lathe wherein a camshaft may be chucked and rotated and tools applied to said camshaft whereby all of the bearings and associated port I tions may be simultaneously turned in a single operation. 40 ‘ Our intention is further to ‘provide a relatively simple and efficient feed mechanism for the lathe wherein none of the feed transmission is reversed 50 during the machining cycle, the purpose of which is to eliminate ‘costly reversing mechanism in connection with the feed transmission and‘ also to eliminate the shock and strain on the appa ratus inherent in reversible mechanism. Still another object is to provide simple and - Figure V is a diagrammatic Layout of the elec trical operating and control circuit and associ ated devices of the lathe. - Another object of our invention is to provide a center drive lathe adapted to chuck and rotate a camshaft intermediate its ends and to apply tools to the workpiece whereby all the main bearing portions, gear ?t, oil grooves, and cham fering of said main bearings may be simultane ously accomplished in a single operation. feed mechanism. . I Figure V1 is ‘a vertical transverse section 40 through the lathe on the line VI-VI of Figures IV and VIII particularly showing the rapid trav erse drive mechanism and the operating mecha , nism for the combined clutch and brake. ' , Figure VII is a vertical transverse section 45 through the lathe on the line VII—VII of Fig ures IV and VIII particularly showing the clutch for engaging and disengaging the feeding mo tion and control mechanism associated therewith. Figure VIII is an enlarged front elevation of the 50 left hand portion of the lathe showing particu larly the rapid traverse drive mechanism and the safety device for preventing actuation of the traverse motion of the carriages when the 55 carriages are being operated manually. > 2 2,124,347 r Figure IX is a vertical transverse section shaft may also be braked from further rotation or through the lathe on the line IX-IX of Figures coasting immediately upon disengagement of the ‘ III and X showing the relationship of the front driving pulley 32 from said main drive shaft 40. and rear tool carriages and the cam mechanism The main drive shaft 40 is journaled and con for actuating said tool carriages. , , _ ?ned from axial movement in anti-friction bear ings 4| and 42 appropriately mounted in the Figure X is a front elevation of the front turn ing or longitudinally feeding tool carriage, partly , housing 38 and has an end portion 43, which pro broken away, to more clearly show the cam jects through a suitable closure cap 44 attached mechanism for actuating the carriage and re 10 lieving the turning tools from the work upon to housing 38, to which is ?xed a universal joint 45. Also ?xed to the universal joint 45 is the their return to initial starting position. , Figure XI is an axial view of the.cams for actuating the rear tool carriages. ' - Figure XII is a layout of'the periphery of the cam for actuatingthe front turning or longitudi- . 'nally feeding carriage and relieving the turning tools from the work' piece. Figure XIII is a plan view partly in section on line XIII-XIII, of Figures VI and VII particu 20 l'arly showing the control mechanism for the com bined‘ brake and chuck and rapid traverse mechaé nisms. ~ shaft‘45 which-in turn is connected to the driv ing pinion shaft 41 of the center drive chuck member ID through the universal joint 48. The shaft 41 carries the usual ‘driving pinion (not shown)_for driving the ring'gear (not shown) of 15 the chucking device 49 of the center drive chuck\ member In. It can thus be seen that through this mechanism driving power from the motor 3| may be .applied or disconnected from the center drive chucking device 49 in the member |0'. 20 Y Feed driue mechanism The general arrangement, Figs. I, II, and III, of Fixed to the main drive shaft 40 intermediate the lathe comprises a bed I which is supported on the anti-friction bearings 4| and 42 is a worm 50 legs 2 and 3. Mounted on the bed I are tailstocks 25 ‘adapted to drive the worm wheel 5| (Fig. VlI) 25 4 and 5 each having axially reciprocatable spin-0 dles 6 supporting centers 'l which spindles 8 may be adjusted axially by means of the usual hand wheels 8 and locked in adjusted position by means I 30' of the usual lever clamping means 9. \On the bed I between the tailstocks 4 and 5 is also mounted a center driv‘é chuck member III which is adapted to grip and rotate a camshaft II intermediate its ends, as for example in a manner shown in appli 35 cation Serial No'. 108,039, ?led Oct. 8, 1936. Noting particularly Fig. IH, each side of the center drive chuck member I0, and between the tailstocks 4 and 5, are located turning or longitu dinally feeding tools I2, I3, I4, and I5 adapted to turn the outside diameter of all the main bearings ‘IS, IT, I8, and I9, respectively; and the tool 28 adapted to turn the gear ?t diameter2| of the cam shaft ||. Also arranged each side of said center drive chuck member I8 and between said 45 5.0 55 60 rotatably mounted on the bearing portion 52 and con?ned from all axial movement of the worm wheel shaft 53 which'is journaled and con ?ned from axial movement by the anti-friction bearings 54 and 55 appropriately mounted in the v30 housing 38. Mounted on the shaft 53 between the worm wheel 5| and anti-friction bearing 54 is a clutch member 58 adapted to slide axially of the shaft 53 but to rotate positively therewith and having clutch teeth 51 adapted to engage or dis 35' engage mating clutch teeth 58 ?xed ‘on the worm wheel 51 by axial'movement of the clutch mem ber 56. It can thus be seen that by this ar rangement the worm wheel 5| may be caused to alternately drive the shaft 53 or to rotate freely 40 on said shaft. , ' _ Referring particularly to Figures IV, VI, and VII, the worm wheel shaft 53 projects rearwardly of the lathe beyond the bearing 55 into aupocket tailstocks 4 and 5 are cutting tools 22-23, 24--25, ' 59 and has the usual splined portion 80 to which 45 28—2‘|, 28-29, and 38, which feed transverse of ' may be. applied suitable change gears, as, for ex the workpiece to thereby chamfer and oilgroove ample, the gear 6| held in place. \on the shaft 53 all of said main bearings I6, I'I, I8, and ‘I9, re by nut 82. vArranged parallel with the worm spectively, and ,chamfer the end of the gear ?t wheel shaft 53 is a shaft 63, journaled on and 2|. Such an arrangement as just described per con?ned from axial movement by the anti-fric mits the complete machining simultaneously of tion bearings 94 and 65 appropriately mounted in all the main bearings and associated portions of the housing 38 and has the usual splined portion a-camshaft in one operation. 66, projecting beyond the bearing 84 and into the pocket v59, to which may be applied suitable Work rotating mechamsm change gears as, for example, the gear 6‘! held in 55 The source of power for rotating the center place by nut 68 which gear is adapted to be driven drive chuck in the member - I 0 is_ derived from the . by gear 6| on the worm wheel shaft 53.‘ A cover usual electric motor 3| (Fig. V) which is mounted 69 is removably mounted over the pocket 59 for- _ inside the leg 2 and is connected to the main 'drivs easy access to said change gear mechanism. ing pulley 32 by means of the usual V-belts On the end ‘III ‘of the shaft 53 projecting beyond 60 housed in the cover 33 at the left hand end of the the bearing. 55 is fixed an over-running clutch 'II lathe. The main driving pulley '32 (Fig. IV) is by which the shaft 12 may be rotated in only one rotatably mounted on suitable bearings 34 and 35 direction, clockwise as shown in Figure VIII, as carried on the projecting hub 38 of the bracket is characteristic of over-running clutch devices, so ‘ 65 31 which bracket in turn is secured to the trans that the shaft 12 may ohlybe rotated by the shaft 65 mission housing 38 mounted on the left hand end 63 for forward feeding motion through the mech of the bed by means of the ?ange 38a and bolts anism about to be described. The shaft 12 is 38b and incorporates a combined clutch and journaled on and con?ned from axial movement brake mechanism 39 substantially as fully dis-J x by the anti-friction bearings 13 and ‘I4 appropri 70 closed and claimed in Patent 1,474,112 issued Nov. ately mounted in the housing 38 and has a worm ' 13, 1923, which mechanism will therefore not be described in detail here. By means of this com ‘I5 ?xed thereon intermediate these hearings which is adapted to drive the relatively large bined clutch and brake mechanism 39, the main worm wheel ‘I6 mounted on the shaft 1'! extending drive shaft 40 may be alternately connected-or longitudinally of the lathe and appropriately 75 disconnected from the‘ driving pulley 32 and said journaled in the housing 38. The shaft 11 pro 75 3 2,124,347 jects to the right (Figures I and VIII) from the housing 38 and has an end portion 18 to which is ?xed a coupling ‘I8 which in turn is ?xed .to the ‘feed drive shaft 88 for the front carriage 8|. The shaft 11 also‘ projects to the left- into a pocket 82 mounted for movement longitudinally of the' bed I‘, in a guide comprising the faces I88, H8, and III, and'held in proper engagement with said faces by suitable gibs II2 secured to the car riage 8| by screws II3. A cam roller H4 is ro formed in the housing 88 and has a relatively tatably mounted on an appropriate stud I I5 ?xed large gear 83 ?xed on said projection which gear is adapted to drive an idler gear 84 rotatably mounted on- a stud 85 ?xed in the housing 38, 10 which idler gear, in turn, is adapted to drive the gear 86 fixed on the feed drive shaft 81 for the in the cam plate I88 and engages in the cam slot I84 so that upon rotation of the cam I82 by shaft rear tool carriages 88 and 88. 88 the cam plate I88 may be actuated longitu 10 dinally of the bed I and carriage 8|. A pair of cam rollers I I8, appropriately mount This arrangement ' ed on studs II'I ?xed in the cam plate I88, engage clearly sets forth the mechanism whereby both in slots “8 (Fig. III) of cams II8 secured to the tool slides I28 by screws I2I, the tool slides I28 15 be simultaneously actuated in feeding motion being arranged to slide to and from the axis of 15 ‘the lathe on the usual dovetail guides I22. It' from the main drive motor 3|. can thus be‘ seen that when the cam plate I88 is the front and rear carriage feed mechanisms may Rapid traverse drive ‘ moved relative to the carriage 8| the cam roller Noting particularly Figures VI and VIII, power ||8will likewise be moved in slots “8 of cams II8 so as to cause transverse movement or move- 20 20 for actuating the tool carriages in rapid traverse movements is derived ‘from the .electricymotor 88 mounted on the housing 38. The shaft 8| of the motor 88 projectsv into a compartment 82 formed integral with the housing 38 andhas a pinion 93 ?xed thereon which is adapted to drive the idler gear 94 appropriately rotatably mount ed on a stud 85 ?xed in the housing ,38, which idler gear in turn is adapted to'drive the gear 88 secured to the shaft 12. It can thus be seen that 80 by energizing the motor 88 the shaft ‘I2 and the mechanism driven through the worm ‘I5 and worm wheel ‘I8 may-be rotated bylsaid motor. It is to be .noted (Figure VIII) that the motor is arranged to rotate the shaft ‘I2 only in the. same 35 direction as it is normally rotated in feeding mo tion by the shaft'83 as described. It is also to be noted that by use of the over-running clutch ‘II the motor 88 may at any time be energized to accelerate and rotate the shaft 12" at a relatively 40 much greater speed than it is rotated by shaft 83 ' without in any way affecting the rotation of shaft 83 and the driving mechanism connected thereto, and, by de-energizing the motor 88 theshaft ‘I2 will again be automatically driven by the shaft 45 83 when the rate of rotation of shaft ‘I2 has de ment of the slides I28 to or from the workpiece II. On the tool slides I28 are mounted appro priate tool holders m, I24,- I25, and I28 for holding the respective tools I2, I3, I4, and I5 and 28 which perform cutting operations as already 25 described. The movement of the tool slides I28 and the tools mounted thereon relative to the work piece of camshaft II, is diagrammatically shown by the arrows A-Ba-C-D indicated on the slides I28 30~ and the movement of the carriage 8| on the bed I is shown by the arrows A—B and C--D on the ‘ carriage shown in Figure III. Noting particular ly Figures III and XII, at the beginning of the machining cycle the slides I28 and carriage 8| are at A, the tools I2, I3, I4, I5, and 28 being withdrawn from cutting position and to the right of the respective portions I8, II, M, I8 ' and 2| to be turned on the camshaft II. As the cam I82 is rotated, the roller II4 is moved longitudinally .40. from A to B in the cam slot I88 while the roller I88 does not move as it travels from A to B in slot I88 as this portion of the cam' slot I83 is parallel to the direction of rotation of the cam i82. Thus the carriage is held stationary relative to the bed 45 of the lathe while the cam plate I88 is moved arrangement the tool actuating mechanism may relative to the carriage 8| whereupon the rollers be rotated constantly in the same direction, except “6 bearing against the angular vportions I21 of when stopped for loading or unloading work in the slots N8 of cams II9 cause the slides I28 to 50 the lathe, and that at any'desired time rapid travel toward the work to cutting position, indi 50 ' celerate‘d to the speed of said shaft 83. By this traverse motion may be imposed upon said mech anism or may be disconnected therefrom and the feeding automatically continued. 5.5 Front tool carriace. Referring particularly to Figures III, IX,'X, and XII, the feed drive shaft 88, which is con ?ned from axial movement by being connected to ‘ the shaft ‘Ifl as described/is supported in suitable 60 journals 81 and 88 in the brackets 88 and I88..re cated by arrow‘ A-B, Fig. III. Next, the roller 688 is caused to follow the an- ' nularly disposed portion from B to C of the cam slot I88 upon continued rotation of cam I82 to - thereby ‘cause longitudinal feeding of the car 55 riage 8| to the left (Fig. III) so as to cause the aforementioned cutting tools to turn their re spective'portionsto ‘be machined. In order to maintain the rollers II8 in position for holding the slides H8 in proper cuttingposition as shown spéctively, these brackets being secured to the bed in Fig. III the portion of the'slot I84 of cam I82, I of the lathe by suitable screws I8I. On the traveled by roller II4 from B to C, \"Is arranged "shaft 88, between the bearings 81 and 88, is ?xed " parallel with the same portion B to C‘of slot I83 the cylindrical cam I82 which has a pair‘of cam so that there will be no relative motion of the 65’ slots I83 and I84 arranged around its periphery. cam plate I88 and the carriage 8|, the cam plate Noting Figures IX and X the front carriage 8| 8| being moved relative to the bed I of the lathe is mounted for“ longitudinal movement on the at the same rate and in the same direction as lathe. A’ cam roller I88, is rotatably mounted on 70 an appropriate stud I81 ?xed in the“ front car this arrangement theturning or longitudinal feed 60 65 usual dovetail slide I88 along thebed Iof the": that of the relative movement of the carriage riage 8|, and engages inthe cam slot I88so that upon rotation of the cam I82 by-shaft 88 the front carriage 8| may be actuated longitudinally of the bed I. ' » A relatively long cam plate I88 is slidably 8| to. the bed I in traveling from B .to C. By operations on the workpiece are'completed. ' I At the completion of the, turning operation the‘ roller I88 is again caused to follow, a portion of the cam slot I88 ‘from C to D, which. is parallel to the direction of motion of the cam I82, where 75 ' 9,194,841 by the carriage 8 I is held stationary on the bed The same reference characters A. B, C and D at the, completion of said turning. Meanwhile (Figure III) have been used for ‘both the front the roller. H4 is caused to follow the angularly turning tools and the rear ‘forming tools so as related portion of cam slot I04 from C to D‘ to more clearly show the relative positions si whereby the cam plate I08 is moved relative to multaneously assumed by both groups of tools the carriage 8i causing the rollers iii to bear during the machining cycle. For example as against the angular portions I28 of the cam slots the front tools-are moved from A to B into cut II8 of cam II8 and thereby start the withdrawal ‘ ting position the rear tools (as indicated by thev arrows on the rear tool carriages 88 and 88 of Figure III) are moved from A to B in rapid 10 arrow C-D of Figure III a substantial distance traverse; as the front tools move from B to C from the .work before the carriage 8i and slides performing the turning operation the rear tools , I20 are simultaneously moved to the initial start move from B to C at coarse‘ feed for the purpose ing position A as roller I08 is caused to move along of removing any excessive stock or ?ash which 15 the angular portion of slot I03 from D to A, might exist on the work .I I. Normally, no actual 16 . returning the carriage, and roller H4 is caused , cutting is done by the rear tools during their to continue along the angular portion of slot I04 travel from B to C. Next, the front tools are ‘of the slides and tools from cutting position, the 10 tools being moved along a path indicated by from D to A tofully retract the slides I20 and the tools from the work piece, the slides and tools following a path relative to‘ the bed I sub stantially as shown by arrow D--A of Figure III. It can thus be seen that by this mechanism we provide means actuated from a non-reversing source of power to bring turning tools to position for turning operations and to relieve said tools from said position when returning the tools to initial starting position for the purpose of pre venting any marring of the previously turned surface._ . Rear tool carriages withdrawn from cutting position from C to D while the rear tools begin and complete the form ing operations and dwell from C to D1—D; and ?nally the front tools are further retracted and returned to initial starting position from D to A while the rear tools are similarly retracted to their initial starting position from D to A. It is to be noted that as the tools travel from A to B and from D to A the feeding cams and the) shaft 80 and 81 associated therewith are rotated‘ at rapid rates by the rapid traverse motor 88 by . means of the mechanism already ‘described and that as the tools travel from B to D said cams 30 Referring particularly to Figures III, IX, and and shafts are rotated at feeding speed directly \ EU, the rear tool carriage 88 is pivotally mounted and axially confined on the shaft I29, which shaft ‘is ?xed in the tailstock 4 and the center drive ‘chuck member I0 and the rear tool carriage .89 is pivotally mounted and axially con?ned on the shaft I 30, which shaft is fixed in the tailstock 5 and the center drive chuck member I0. Appro priate tool holders I3I, I32, I33 and I34 carry the 40 respective tools 22—23, 24—25, 28—2‘I, and 28— ' 29-30 on the integral upright standards I35 and I38 of the carriage 88 and, I3‘! and I38 of car 45 riage 88. Suitable elongated holes I3Ia and I32a are provided in the standards I3I and I32 toallow passage of shaft 46. On the lower rear ward portion of each tool carriage 88 and 89 are formed integral forked projections I39 which carry a roller I40 between the forked ends on a from the main drive motor II as described. Thus it can be seen that we provide ‘cam means for actuating the tools at rapid traverse and various rates of feed and that we supplement the func- ' 35 tions of the cams with appropriate high and low speed drives for said cams to render them more effective in producing said rapid traverse and various feeding rates of tool movement. It is further to be noted that we accomplish all of 40, said tool movements without reversing any por tion of the lathe transmission. Operation and control During the normal operation of the lathe the 45 main drive motor 3| is at all times rotating. The usual start push button I48 and stop push but- ‘ ton I41 are provided in the push button control station I48 for turning the motor 8| on and of! when the lathe is not being used. 50 The combined clutch and brake mechanism suitable stud “I fixed in said forked portions. The feed drive shaft 81 is journaled in suitable brackets I42 and I43 secured to the rear of the bed I by screws I44 (Fig. II). Peripheral cams 38 is operated by manipulating the starting han I45 are ?xed on said shaft 81, preferably adjacent dle I48 which has an integral vertical rock shaft the brackets I42 and I43 for adequate support, I50 carried in bearings I 5|, I52,-and I53 in the 55 which cams I 45 contact and support the rollers ’housing 38 (Figure VI). Immediately below the 55 bearing I5I is a thrust collar I54 and a shifter I40 of the tool holders 88 and 88, whereby rota tion of the shaft 81 and the cams I45 will cause yoke I55 ?xed to the shaft I50 to thereby prevent _ the tooLholders 88 and 89 to be rocked about their axial movement of the shaft I50. The shifter respective pivot shafts‘v I28 and I30 to move the yoke I55 has the usual shoes I58 at its outer ends 60 rear tools Ill-23, 24—25, 26—2'I, and 28——-29—30, which ride in the annular slot I51 in the shifter ‘spool I58. The spool I58 is free tomove axially to or from the work piece II. Noting particularly Fig. XI, the cams I45 have of the shaft 40 upon which it is carried and is ' their peripheries so arranged that upon rotation caused .to rotate with said shaft 40 by means of of said cams by shaft 81 the rollers I40 are caused the pin I59 which passes diametrically through 50 65 to travel along these cams from A to B to cause the rear tools to move in rapid traverse toward the camshaft II; as the rollers travel from B to the spool I58, through the axially elongated-slots I80 in the shaft 40,"and through the shifter rod I8I. By this arrangement the combined clutch a C said tools are actuated at‘ relatively coarse feed; , and brake mechanism can, be manually rendered effective or ineifectiye- as fully set forth inPatent 1,474,112 aforementioned ‘so that by moving the 70 travel from D1 to D the tools will be held'stae (handle I48 toward the right hand end of the lathe tionary in “dwell ‘for ‘sizing the work piece; and as the main motor 3! will be caused to rotate the the rollers travel from D to A, the tools will be center drive chucking device 48 and to drive the returned from the work in rapid traverse to the ’ feeding ‘mechanism, and that by‘ returning'said, handle vI48 toward the left hand end of the lathe 75 75 initial starting position A. . , ' as the rollers travel from C to D1 said tools are 70 actuated at relatively ?ne feed; as the rollers 5 2,124,847 . ' handle just after the tools ‘have left position D (Figure 111) in rapid traversing to the initial the motor 3I will be vdisconnected and the center drive chucking device 49 and the feed mechanism starting position A. . stopped. and XIII) is an arm member I62 secured to the rock shaft I56 by a suitable pin' I63. Below the ' member I62 is pivotally ‘mounted the latch mem the self closing coolant control valve I92. By 10 10 rock shaft I56.. The latch member is normally manipulating the starting lever 149 the latch urged in a clockwise direction ‘(Figure X111) about the rock shaft I56 by the tension spring I65 connected to a stud I66 ?xed in the housing 38 and connected at its other end to a projecting _ ' able supports I89 and I96 in the housing 38 which rod in turn contacts the plunger I'9I of ber I64 on the rock shaft I56and which member 6 is also adapted to axial movement on‘ the said 15 arm I61 of the latch member I64. . Means are also provided for automatically con trolling the coolant supply for the tools compris ing a pin‘ I81 ?xed on the latch member I 64 which engages the push rod I88 carried in suit Directly below the bearing I52 (Figures VI, VII, _ Noting Figures VI, VII, and, XIII, the latch member I64 is normally urged axially upward, of the shaft I56 by the lever I68 which is pivotally member. I64 will be moved as described thereby starting work rotation and feeding of the tools, ' the pin I81 ~ pushing the rod I88 against the plunger I9I to open valve I92 causing coolant to 15 HOW to the cutting tools, and upon tripping the starting lever to stop work rotation and tool feeding the pin I81 will be withdrawn from rod - mounted on the shaft I69 and has forked end I88 allowing the plunger to'push the rod I88 20 portions I16 each of which have pins I'll ?xed, and exterrd itself, thereby closing valve I92 and v20 therein and adapted to engage in peripheral shutting oil’ the coolant from the cutting tools. In Figure V is shown the general arrange slots I12 in the hub portion I13 of the latch ment of the control mechanism for rendering member I64, said lever I68 also having a pro the rapid traverse motor 96 operative and inoper jecting arm I14, extending diametrically oppo , 1 , 25 25 site to-said portions I16, to the end of which is ative at appropriate times.‘ The limit switches LS-—-A and LS-B are attached a tension spring I15 whose other end single throw switches which are mounted on is ?xed to the stud I16 ?xed in the housing 38. Formed integral with the member I62 is a the, bracket I93 secured. to the bed I by bolts projecting arm I11 adapted to engage a pin I18 I94, the switches being bolted together each side 30' fixed in the ‘arm I 61 of'the latch member I64 whereby rotation of shaft I56 in an anti-clock wise direction (‘Figure XHI) will cause similar rotation in the latch member I64 whereupon the spring I65 is stretched, and upon release ofsaid. lever the shaft I56 may be returned in a clock wise direction by the spring I65. In order'to hold the latch member I64 in the anti-clockwise rotated position shown particu 49 larly in Figures VII and XIII, a latch, dog~ I19 is provided on the latch- member I64 which is adapted to engage and latch about the catch plate I86 fixed-yon housing 38 under the in?uence of the spring I15 and associated mechanism. as described which normally urges the member I64 and its dog I19 against said catch plate I86. It, is to be noted that when the latch member I64 is so heldby the catch plate. I86 the handle lever I49 is free to be manipulated at any time to operate the combined clutch and brake mecha so nism 39 for stopping or starting work rotation and tool feeding. ‘ ‘ of the bracket I93 by suitablebolts I95. ,Each 30 switch has the usual plunger I96 and roller I91. The limit 'switch IS-A is actuated by the cam I98 and the limit switch LS-B is actuated by the cam I99, both of which cams, are appropriately mounted on the shaft 81 (Figure XIII). _ _ 35 The limit switch LS--C is a two-way switch adapted to render either switch LS-'—A or LS-B operative, and is mounted on a plate 266 by screws 26I which plate inyturn'is secured to the housing 38 by suitable screws 262, this switch having the usual plunger 283 and roller 264. This switch is actuated by the cam portion 265 formed integral with the latch member I64. The switch normally contacts the terminals 266 (Figure V) when the roller 264 is released as shown in Figure XIII and when the starting lever I49 is tripped as described, the cam portion 265 depresses the-roller 264 and plunger 263 so as to contact the terminals 261 and disconnect terminals 266. ‘ > 50 The limit switch LS-D is a safety switch which functions in connection with the manual Means are provided for automatically disen gaging the dog I19 from the catch plate I86 so means for actuating the tool carriages. In the push button station I48 is also pro as to trip the latchv member I64 and thereby ro 55 tate shaft I56 and disengage the spindle rotation vided a. two-position snap switch 268 whereby 55 andv feeding .at a. predeterminedpoint in the the entire rapid traverse electrical, system may __machining cycle. This ‘means comprises the . be rendered operative or inoperative by setting lever'a‘rm I8I formed integral with the lever. I68 the switchr268 either at “automatic” or“‘hand" which supports a roller I82 on a suitable pin I83 positions respectively as indicated on ‘said switch._ ‘ The operating cycle of the machine is sub 60 60 fixed in the end thereof. On the shaft 81 is stantially as follows: The main drive motor 3| mounted a trip dog‘ I84 having a cam lobe I85 which is adapted to contacttheroller I82 at a is operating‘at all times having been set in mo predetermined position of rotation of. shaft 81 tion by pressing the f‘Start” button I46. After and to thereby raise lever I8I (Figures VI and having appropriately loaded and chucked a work 65 VII) against the spring I15 thus moving the piece in the machine,"the starting handle I49 is 65 latch member I64 axially downward to disengage moved to the right (Figure I)...whereupon the the dog I19 from catch plate I86 whereupon the work is rotated and the feeding mechanism set in motion. As the handle I49 is so moved the spring I659 rotates the latch member I84 clock wise (Figure XIII) and, through the mechanism limit switch LS-C is actuated by latch member described, disconnects the main drive motor 3I " I64 and its cam 265 to disconnect terminals 261 from the work rotating and feeding mechanism. and connect terminals 266. At this, time the A suitable adjusting screw I86 is providedtin the > limit switch LSl-A is relieved by the cam I98 . trip ‘dog I84 so that said dog I84 may be clamped ' and is thereby closed, and limit switch LS-B is in a circumferential position on shaft 81, prefer .ably in such a. position as to trip the starting contacted and held open by cam I99. Under these conditions the rapid traverse motor 96 is 75 r e , , » . 2,124,847 energised to traverse the tool carriages from A ' ally in the opposite direction to normal rotation . it will be necessary to disengage the clutch 59 When the tool carriages have been rapid trav (Figures IV and V11) as the worm ‘wheel 5| can ersed to the‘ position B, the limit switch LS-A not drive the worm 50 to permit such rotation is opened by the cam I99 de-energizing the rapid of shaft 12. The clutch 56 may be quickly en to B (Figure 111). ' traverse motor 90 and arresting the rapid trav gaged and disengaged by manipulating the con erse motion, the limit switch 15-3 is relieved from the cam I99 and. thereby preset in closed in the bearings 2_I9 and ‘M4 in the housing 99, - position for rapid traverse return, and the limit switch 18-0 is still maintained with terminals 209 in contact. With this arrangem nt the, tool carriages are actuated in feeding ovement \ from position B to position D to thereby complete . trol lever 2“ to rotate the shaft 2i2 journaled' which shaft has an integral tooth 2l5 out there on which engages in the annular slot‘ H6 in the 10' clutch member 56 so that by rotation of the - shaft 212 said clutchmember 59 may be moved axially. for engagement or disengagement of the the machining portion of the cycle for all the clutch teeth 51 and‘ 58. tool carriages. A safety device is provided whereby the rapid 15 traverse motor cannot be rendered effective to rotate the shaft 12 at rapid traverse speed so -_ ' I. When the position Dhas been reached the cam lobe ill of the trip dog I94 contacts the roller I82 and thereby trips the starting handle I49 to 5 stop work rotation and tool feeding movements as described, whereupon the cam 299 of the latch ‘member I94 depresses the roller 2'04 and plunger 203 of limit switch LS-C disconnecting terminals 206 and connecting terminals 201. Meanwhile the limit switch LS-A is still held open by the cam I98 and the limit ‘switch 18-13 is still re lieved from the cam I99 and remains closed. Under these circumstances the rapid traverse motor 90 is again energized to thereby withdraw the tool carriages to the initial starting or load ing andunloading position A. As the tool carriages reach position-A the limit switch LB_—A is relieved of the cam I99 and preset in closed position and the limit switch 18-8 is actuated by cam I99 and held open, the limit switch LB-C still maintains the- terminals 201 in contact so long as the starting handle “9 remains‘ tripped to disconnect the motor 3| from the work rotating and feeding mechanism. Upon again moving the starting handle I49 to the right-the limit switch I.'8-‘-C will disconnect , - terminals 201 and connect terminals 209 to there - by repeat the cycle described above. > long as the crank handle 2l0 is applied to the squared end portion 209 thereof. This device comprises the normally open limit switch I$-D 20v conveniently placed near the end 209 of the shaft 12 and connected in series with the motor 90 so that said motor can only be rendered operative by closing said switch LS_——'D. The switch LS—D is fully enclosed, in a pocket 2|‘! covered by the 25 cover ‘M8 and has a stud'2l9 ?xed in the pocket 2" upon which may be placed the crank handle 2“) in such a way as to close the limit switch 18-D. It can thus be seen that when the crank handle M0 is placed on the end 209 of shaft 12 30 the limit switch LS—D will be open preventing operation of the motor 90 and before the motor can be rendered operative the crank handle 2“! must be removed from the end 209 and placed on stud 2i9 so as to close limit switch 1S-D. 35 Having fully set forth and described our in vention what we claim as new and desire to se cure by Letters Patent is: -1. In a lathe, a. rotatable work holder, ‘means for rotating said work holder, tool feeding de 40 vices reciprocatable relative to a work piece in J said work holder, rotary cam means for longi When »it- is desiredto use the starting handle‘ tudinally feeding said tool feeding devices, com I49 for inching the center drive chucking device 49 around for unclamping the work piece there 1 ' from, the cam I99 is maintained in contact with - limit switch LB-A to hold said switch open as bined rotary and straight cam means for reliev ing said tool feeding devices‘relative to the work piece, and non-reversing transmission mecha 45 nism operable by the means for rotating said the tool carriages travel back and while said carriages remain at position A. The cam I99 is work holder to render said cam means effective. so arranged under these conditions that when for rotating said vwork holder, tool feeding de 50 the starting handle is moved to begin the operat ing cycle‘ the tool carriages move to the work piece under‘ feeding speed during a few revolu~ tions of the chucking device 91 before entering into rapid traverse movement toward the work. The starting handle I49 may be manipulated to inch said chucking device a few revolutions when the tools are at the starting position without the 2. In a lathe,-a rotatable work holder, means vices operable to ‘feed cutting tools to and from a work piece in said work holder, cam means for actuating said tool feeding devices, non-revers ing transmission mechanism operable by the means for rotating said work holder to actuate 55 said cam means‘ for feeding motion of said de vices, and means for imposing more rapid rota machining cycle, immediately commencing my tion upon said transmission mechanism. for actu ating said tool feeding devices‘ in rapid, traverse rapid traverse of the tools to the work, motion. , _ Means are provided for manually actuating the tool carriages in... either direction when, for ‘ ' 60. 3. In a lathe, a rotatable work holder, means ' for-rotating said work holder, tool feeding de instance, the cutting tools are being set or re vices operable to feed cutting tools to and from a placed after sharpening. The end of the shaft work piece in said work holder, cam means for 12 extending beyond the gear 96 has a squared actuating said tool feeding devices, non-reversing end portion 209 to which may be applied the transmission mechanism operable by the means usual crank handle 2|0 for easy manual rota .for rotating said work holder to actuate said cam tion of the shaft 12 and, through the feed mecha- ' means for feeding ‘motion of said devices, means nism, movement of the tool carriages. The for imposing more rapid rotation upon said trans- . shaft 12 may be rotated in normal feeding or . mission mechanism for actuating said tool feed rapid traverse direction at any time by said han ing devices in rapid traverse motion, and means dle asvthe over-runningclutch 'il automatically disconnects the ‘shaft 12 from the shaft 63 as described when shaft 12 is so rotated. However, should it be desired to rotate the shaft ‘I2 manu for automatically disengaging said transmission mechanism from. the means for rotating said work holder when said transmission mechanism is being more rapidly rotated. 75 7 2,124,347 4. In a lathe, a rotatable work holder, means for rotating said work holder, tool feeding de vices operable to feed cutting tools to and from a work piece in said work holder, cam means ' for actuating'said tool feeding devices, non-re versing transmission mechanism operable by the means for rotating said work holder to'actuate said cam means for feeding motion of said de vices, manual means for rotating said trans 10 mission means in either direction, means for automatically disengaging said transmission lathe, means for reciprocating said cam plate by said rotary'cam means, and cam means mounted on said tool slides actuated by said cam plate. 8. In a lathe, a rotatable work holder, tool feeding devices operable to and from a work piece in said work holder, a constantly operating source of power for rotating said work holder and operating said tool feeding devices at feeding speeds, a source of power independent of said first mentioned source of power for operating said tool 10 feeding devices at rapid traverse speeds, mechani- , mechanism from the means for rotating said cally operated electrical control means operablev work holder when said transmission is rotated , by the movement of said tool feeding devices for manually in forward direction, and manual 15 means for disengaging said transmission mecha nism from said means for rotatingsaid work holder, when 'said transmission mechanism is manually rotated in reverse direction. . 5. In a lathe, a rotatable work holder, means 20 for rotating ‘said work holder, tool feeding de rendering said source of powerfor operating said» tool feeding devices'at rapid traverse speeds ef- 15 fective or ineffective. 9. In a‘ lathe, a rotatable work holder, tool feeding devices operable to and from a work piece in said work holder, a‘constantly operating source of power for rotating said work holder and op 20 erating said tool feeding devices at feeding speeds, manually operable electrical-control means for vices operable to feed cutting tools to and from a work piece in said work holder, non-reversing transmission mechanism actuated by the means for rotating said work holder to actuate said cam 25 means for feeding motion of said devices, means for imposing more rapid rotation upon said trans rendering said source of power operative or in operative, a source of power independent of said ?rst mentioned source of power for operating said 25 _ mission mechanism for actuating said tool feed mechanically operated electrical control means ‘ ing devices in rapid traverse motion, means for applying manual rotation to said transmission '30 mechanism, and means to render said means for imposing more rapid rotation upon said trans mission mechanism ineffective when said means for manual rotation is applied to said trans mission mechanism. as 6. In a lathe, a rotatable work holder for supporting and rotating a work piece inter mediate its ends, means for supporting the ends ,of’said work piece, means for rotating or arrest ing rotation of said work holder comprising a 40 source of power for rotating said- work holder and a combined clutch and brake mechanism for rendering said source of power effective or inef fective, tool feeding devices operable each side of said work holder and work piece supported there 45 in, cam means for actuating said tool feeding de vices, means for ‘actuating said cam means for moving said tool-feeding devices at feedin'g speeds comprising a shaft driven by saidmeans for ro tating said work holder and a pluralityof cam shafts driven by said ?rst mentioned shaft for 50 actuating said cams,‘ and means for moving said tool feeding devices at rapid traverse speeds com prising a source of power, independent of the source of power for rotating said‘ work holder, 55 connected to and adapted to rotate said ?rst mentioned shaft at a more rapid rate than said shaft is rotated by said means for rotating said work holder, and means for automatically disen gaging said‘?rst mentioned shaft from said means 60 for rotating said work holder when said source of tool feeding devices at rapid traverse speeds, operable by the movement of said tool feeding devices for rendering said source of power for op erating said tool feeding devices at rapid traverse 30 speeds effective or ineffective, and manually op erable means for rendering said mechanically . operated electrical. control means effective or in effective. I 10. In a lathe, a rotatable-work holder, tool 35 feeding devices operable to and from a work piece in said work holder, a constantly operating source of power for rotating said work holder and operating said tool feeding devices at feeding speeds,‘ transmission mechanism connecting said 40 constantly operating source of power to said work holder, and tool feeding devices, a manually op erated engageable and releasable connection be tween said source of power and said transmission mechanism, a source of power independent of said 45 ?rst mentioned source of power for operating said tool feeding devices at rapid traverse speeds, and, electrical control means operated by the opera tion of the engageable and releasable connection and the movement of said tool feeding devices to 50 render said last mentioned source of power effec tive or ineffective. ' 11‘; In a lathe, a rotatable work holder, tool feeding devices operable to and from a work piece in said work holder, a constantly operating source 55 of power for ,rotating said work holder and op erating said tool feeding‘devices at feeding speeds, . means for connecting or disconnecting said source of power'from said work holder and tool feed ing devices, a source of power independent of 60 said ?rst mentioned source of power for operat ing said tool feeding devices at rapid traverse rapid traverse speeds is operating and for auto matically re-engaging said shaft with said means for rotating said work holder when said source of , speeds, means operable by the movement of said rapid traverse speeds is rendered inoperative. tool feeding devices to render said last mentioned v'7. In a lathe, a bed, a carriage longitudinally source of power operative to rapid traverse said 65 reciprocatable on said bed, a rotary cam mounted tool feeding devices toward said work piece, on said bed, means on said carriage to engage saidv means operableby the movement of said tool cam whereby said carriage may be longitudinally I feeding devices to render said'last mentioned reciprocated by rotation of said cam, tool slides 70 reciprocatably' mounted ‘on said carriage ‘for source of power operative‘ to rapid traverse said 'tool feeding devices from said work piece, and 70 movement to and from the center line, of said ‘ means actuated by the operation of said conn‘ect lathe, and means operatedby said cam ‘means for ing and disconnecting means to alternately render reciprocating said tool slides comprising a cam one or the other of said last mentioned means ef plate reciprocatablys'mounted‘on said carriage for 75 longitudinal movement relative to the bed of the fective. , ~ ‘ . 12. In a, lathe, a rotatable work holder, tool 8 2,124,347 . feeding devices operable to and from a work piece in said work holder, a constantly operating source of power for rotating said work holder and operating said tool feeding devices at feed mounted on said bed, means for rotating said work holder, tool feeding devices pivotally mount- _ ed on said bed adapted to move cutting tools in arcuate paths relative to a work piece in said work holder,-peripheral cams rotatably mounted on said bed, means onv said tool feeding devices to engage the periphery of said cams, various ing speeds, means for connecting or disconnect ing said source of power to said work holder and tool feeding devices, means for holding said con necting vand disconnecting means in connected differently radially positioned cam surfaces position, means operable by the movement of said . formed on the periphery of said cams for effect 10 tool feeding devices to automatically disconnect ing various rates of feeding and dwell ‘forsald 10 said connecting and disconnecting means, in tool feeding devices, and means for rotating said dependent manually operable means for a‘ctu ating said connecting and disconnecting means, a source of power independent of said ?rst men 15 tioned source of power for operating said tool cams. > I 16. In a lathe, a bed, a rotatable work holder mounted on said bed, means for rotating said work holder, tool feeding devices pivotally 15 feeding devices to rapid traverse speeds, means mounted on said bed adapted to move cutting operable by the movement of said tool feeding tools in arcuate paths relative to a work piece devices to render said last mentioned source of in said work holder, peripheral cams rotatably power operative to rapid traverse said tool feed mounted on said bed, means on said tool feed 20 ing devices toward said work piece, means oper ing devices to engage the periphery of said cams, 20 able by the movement of said tool feeding de various differently radially positioned cam sur vices to render said last mentioned sourceof faces formed on the periphery of said cams for power operative to rapid traverse said tool feed‘ effecting various different rates of feeding and ing devices from said work piece, and means dwell for each of said tool feeding devices, and actuated by the operation of said connecting and\ means fonrotating said cams. 25 disconnecting means to alternately render one 17._ In a lathe, a bed, a rotatable work holder ' or the other of said last mentioned means e?ec \mounted on said bed, means for rotating said tive. work holder, tool, feeding devices pivotally 13. In a lathe, a rotatable work holder, means 30 for rotating said work holder, tool feeding devices reciprocatable relative to a work piece in said work holder, a single cam means for longitudi nally feeding and relieving said ‘tool feeding de vices‘ from said work piece, and non-reversing means for rendering said cam means effective. 14. In a lathe, a rotatable work holder, means for rotating said work holder, tool feeding devices reciprocatable relative to a work piece in said work holder, means for longitudinally feeding ‘ and relieving said tool feeding devices from said work piece comprising, a cam drum, cam means on said cam drum, and non reversing means for rotating said cam drum. - 15. In a lathe, a bed, a rotatable work holder mounted on‘said bed adapted to move cutting tools in arcuate paths relative to a work piece in 30 said work holder, peripheral cams rotatably mounted on‘ said bed, means on said tool feed ing devices to engage the periphery of said cams, various radially positioned cam surfaces ‘formed on the periphery of said cams for effect ing various rates of feeding and dwell for said tool feeding devices, means for rotating said cams at relatively slow speed to cause said feed ing and dwell, and means for rapidly rotating said cams to effect ‘a rapid traverse of said tool ' feeding devices. ' , WILLIAM F. GROENE. ROSS M. BACON.