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Dec. 10, 1946. 2,412,549 E. w. YATES EI'AL AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1943 7 Sheets-Sheet l NMmo .PNI 9m » .I mvw Nb“. \MN “MW _r __|.I m. amHi m Qv‘aBQN\ “NMNvNYaw \UFbPIN.;UP!H-UILFM “MN . __n m.\ 0N X m” “N W1L _ afvl“ l “T: bN___ __ mu0RKw.sQ\ _: __\NM E w J“ "T: b:G.“_m an _w. NN sfWM.?CTkit?F.xL““33%.? :ci.._nfi1i._T%|.QNl,7 IlJIElEM'l1L_nl lh u MNY. .m.\ H _,1..L_r._. #| 1|. 1.1.l1M MK m P Dec. 10, 1946. E. w. YATES EI'AL 2,412,549 AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1943 '7 Sheets-Sheet 2 1:2? 2 Ii? 7? I A77 Msx' Dec. 10, 1946. 2,412,549 E. w. YATES ETAL AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1943 '7 Sheets-Sheet 3 vb INVENTORS. faxmppA/Xvw; BY A77’ mars)!‘ Dec. 10, 1946. E. w. YATES ETAL 2,412,549 AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1943 R 2529 7 Sheets-Sheet 4 Dec. 10, 1946. E. w. YATES ET AL 2,412,549 AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1943 7 Sheets-Sheet 5 INVENTORS, 245 fawn/Pal‘! )Zris BY ikFfJ/AWW; A Troy/Y; X Dec. 10, 1946. E. w. YATES EI'AL 2,412,549 AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Filed June 10, 1945 7 Sheets-Sheet 7 7]Ii 1NVENTOR5 fow/woM )Zm-zs 2,412,549 UNITED STATES PATENT OFFICE Patented Dec. 10, 1946 2,412,549 AUTOMATIC PATTERN CONTROLLED MILLING MACHINE Edward W. Yates and Taft S. Armandro?‘, Cin cinnati, Ohio, assignors to The Cincinnati Mill ing Machine 00., Cincinnati, Ohio, a corpora tion of Ohio Application June 10, 1943, Serial No. 490,366 15 Claims. (Cl. 90—13.5) This invention relates to milling machines and more particularly to automatic pattern controlled milling machines. 2 Other objects and advantages of the present invention should be readily apparent by reference to the following speci?cation, considered in con junction with the accompanying drawings form In the formation of irregular surfaces on a ing a part thereof and it is to \be understood that work piece by automatic means, it is common any modi?cations may be made in the exact practice to utilize a pattern for engagement by a structural details there shown and described, tracer, which is usually connected to the tool within the scope of the appended claims, without support to govern or control the irregular path departing from or exceeding the spirit of the in of movement of the tool. vention. 10 Some operations of this kind are rather simple Referring to the drawings in which like refer in that they are merely an outlining operation, ence numerals indicate like or similar parts: requiring two-directional movement, while others are more complicated, ultimately requiring three directional movement of the cutting tool in order to complete the operation. In many cases it is necessary to combine the different methods of operation, such as forming one portion of a sur Figure 1 is an elevation of a machine tool em bodying the principles of this invention. Figure 2 is an end elevation of the machine shown in Figure 1 as viewed from the right hand side of that ?gure. Figure 3 is an enlarged view of the depth con face by pattern controlling two-directional move trol tracer bracket including a cross sectional ment of the tool in one plane, and then changing view through the tracer mechanism. over and pattern controlling two-directional 20 Figure 4 is an enlarged view of the other tracer movement of the tool in a second plane usually support including a section through the tracer at right angles to the first plane. When' the control valve. work has a constant cross-sectional shape in a Figure 5 is a section on the line 5-5 of Fig given direction it becomes possible to utilize a ure 2. Figure 6 is a section on the line 6--6 of Figure 3. relatively thin two-dimensional plate as a pattern Figure '7 is a section on the line '|——‘l of Figure 3. rather than a large three-dimensional block. Figure 8 is a detailed section on the line 8-8 of In view of all of these various requirements and methods of operation it is an object of this inven Figure '7. Figure 9 is a detailed view of the pattern sup tion to provide a pattern controlled milling ma chine having a cutting tool which is capable of 30 port adjusting mechanism. Figure 10 is a detail section on the line Ill-40 three-directional relative movement with respect to a work piece, that is, axially and two directions of Figure 5. Figure 11 is a diagrammatic view of the hy laterally, with improved control means whereby in a single machine it is easily and readily possible _ draulic control circuit. Figure 12 is a section on the line l2--l2 of to selectively pattern control the axial movement only; pattern control the two lateral movements Figure 2. Referring to the drawings and more particu simultaneously and in variable proportion where larly to Figures 1 and 2 the reference numeral l0 by a 360° orbit may be obtained; or to control simultaneously all three directions of movement 40 indicates the bed of the machine upon which a table H is slidably mounted and adapted to be of the tool and in an automatic manner. Another object of this invention is to provide propelled by a piston I 2 slidably mounted in a an automatic three-directional pattern controlled cylinder [3, and connected by a piston rod M to the table. A column l5 uprises at the rear of milling machine. A further object of this invention is to provide 45 the ‘bed to which it is integrally connected. The a pattern controlled milling machine with two column has vertical guideways [6 formed thereon automatic pattern controlled tracers and suitable upon which slides a vertically movable carrier l1. selective connections whereby either may be used This carrier is adapted to be propelled by a piston individually to automatically control movement I8 contained in a cylinder IS, the cylinder being of the tool in respective planes. or intercoupled for 50 integral with the column, and a piston rod 20 simultaneously controlling the movement of the serves to connect the piston to the slide. On ac tool in three directions simultaneously. count of the weight of the slide l1, and the other An additional object of this invention is to pro parts attached thereto which are to be described, vide a dual tracer, pattern controlled milling ma the slide I1 is counterbalanced by a counter chine with means for individually adjusting the weight 2| which is connected to the slide by a tracers relative to one another and with respect to 55 chain 22 passing over pulleys 2'3 and 24 mounted the cutting tool for set-up purposes and to pro in a bracket 25 attached to the top of the column. vide means for preventing movements dictated by The slide H has horizontal guideways 26 one tracer from being imparted to the other formed therein for slidably supporting a spindle tracer whereby simpli?ed patterns may be used to (i0 carrier 21 for movement toward and from the produce a three-dimensional surface on the work. 2,412,549 3 table. The spindle carrier is also adapted to be propelled by a hydraulic motor comprising a means will be" immobilized, At the same time the ‘servo-screws must be operatively disconnected cylinder 28 containing a piston 29 which is op from the actuated slide. This is all accomplished eratively connected by a piston rod 30 to the carrier 21. The cylinder 28 is ?xed in the slide $1 automatically by admitting pressure to one chan I1. nel which is the channel 84 shown in Figure 11 having one terminus connected to port 85 of the selector valve 86 which contains the plunger 4|. This valve has a pressure port 88 which is con Power feeding and manual adjustment of the three slides is controlled by individual servo valves. As shown in Figurell, the piston and cylinder motor I2, |3 for the table is adapted to 10 nected by the plunger 4|, when it is shifted to the right of the position shown, to port 85 where be controlled by a servo-valve indicated generally by pressure is admitted to channel 84. by the reference numeral 3| which has a pres This channel has a ?rst branch line 89 termi sure port 32, a. pair of exhaust ports 33 and 34, nating in a pair of cylinders 90 which contain and a pair of motor ports 35 and 36. The chan nels 31 and 38 from ports 35 and 36 terminate in 15 plungers for rotating ports 39 and 40 of a selector valve having a plunger“, the power transmission not shown for the ver When the plunger is in the position shown in Figure lllthe ports 39 and 40 are connected to tical servo-screw 64, but which is connected to ports 42 and 43respectively which have chan 20 the gear 81. A second branch connection 93 serves to connect channel 84 to a pair of cylin nels 44 and 45 that terminate in opposite ends ders 94 containing plungers, for rotating a lever of the cylinder I3. When the servo-valve plunger 95 centrally connected to a shaft 96 for discon necting the power transmission to the servo 46 is in a central position as shown, the piston I2 and thereby the table is held stationary. The is adapted to :be moved by a servo-screw 25 screw 41. A third branch connection connects this chan nel to a disengageable nut 98 for disconnecting the servo-valve plunger 46 from! the table servo screw 41. Another, branch channel 99 termi nates in a cylinder I00 having a plunger I 0| for port 49. a pair of exhaust ports 50 and 5| and a pair of motor ports 52 and 53. These latter ports 30 camming the nut portions I02 out of engagement with the screw 64 whereby the vertical slide I1 are connected by channels 54 and 55 to ports 56 The piston and cylinder I8, I9 for the vertical slide I1 have a servo-valve indicated generally by the reference numeral 48 which has a‘ pressure may move independent of the screw. and 51 of a selector valve having a control I For automatic tracer controlled operations the plunger 58. When this plunger is in the position vertical slide and the table are operatively con shown, the ports 56 and 51 are connected to ports nected ‘for control by a tracer control valve in 59 and 60 from which channels 6| and 62 extend dicated generally by'the reference numeral I03 to opposite ends of the cylinder I9. which supports a tracer ?nger I04 and shown servo-valve plunger 63 is in the position shown in Figures 2 and 4. The cross slide or spindle all flow to and from the cylinder I9 is cut oil’ and the piston I8 is held stationary. The valve 40 carrier 21 is operatively connected to a tracer control valve I05 which, in turn, is controlled by plunger 63 may be operated by a servo-screw 64-. a tracer ?nger I06 as shown in Figure 3. It will The piston and cylinder motor 29, 28 for the be noted that the selector valve plungers 58 and spindle carrier slide 21 has a servo-valve indicated 4| in Figure 11 are operatively connected to a generally by the reference numeral 65 in which is a pressure port I56,v a pair of exhaust ports 61 and 68 and a pair of motor ports 69 and 10. These latter ports are connected by channels 1| and ' The two plungers 5B and 4| together constitute a selector valve which selects’between manual op eration and automatic tracer controlled opera tion of the. table II and the vertical slide I1. The plungers are shown in a manual control posi tion and are held in this position by a spring pressed latch I09. When this latch is removed a spring “0 operating on the end of plunger 58 shifts it to the left, as viewed in Figure 11, and 12 to a selector valve indicated generally by the reference numeral 13 and having a plunger 14 in which is formed grooves 15 and 16 for inter connecting channels 1| and 12 to channels 11 and 18 which terminate in opposite ends of the cylinder 28. When the servo-valve plunger 19 is in the central position shown, the piston 29 is held stationary. The valve'plunger 19 may be actuated by a servo-screw 80. through crank I01 shifts the plunger 4| to the right. This results in the following connections . The various servo-valve control screws 41, 64 and being established. 80 may be‘ power actuated ormanually actuated by a mechanism such as that shown in U. S. Patent No. 2,239,625, issued April '2 not believed to be necessary. The various hand wheels for rotating the servo-screws are shown, . however, in Figures 2 and 11 and in these ?gures the hand wheel 8| is Operatively connected to the servo~screw 41, the hand wheel 62 is operatively connected to the servo-screw 80 and the hand wheel 83 is operatively connected to the servo~ screw 64. hNo power means have been provided in this ma f ' 0 in rotatable crank I01 ?xed on a rotatable shaft I08 for joint operation. The ports 59 and 60 which control the piston I8 are connected by the annular grooves III and 60 “2 to ports || 3 and “4 which have channels I | 5 65 The valve II9 has a pair of pressure ports I29 and I30 and the valve I28 has a pair of pressure 70 ports |3| and I32 and all of these pressure ports are connected to a common supply channel I33 which is connected to port I34 of a, feed-rapid traverse selector valve I35. This valve is supplied 75 by a rapid traverse pump I 36 and a feed pump I31 which have suitable intakes for withdrawing fluid 2,412,549 5 from a reservoir I38 and individual channels I39 and I40 which terminate at ports MI and I42 in the selector valve. The port I42 is continuously connected to the port I34 whereby the channel I33 is always maintained under pressure by the feed pump. Each of the reversing valves H9 and I28 have an exhaust port I43 and I44 respectively which are connected by channels I45 and I46 to ports I82 and I83 which are all supplied through a branch I84 of the supply line I33. When the tracer ?nger I04 engages a pattern or other object it causes through the ball and socket connection I85, shown in Figure 4, an axial movement of the plunger I12 to the right as viewed in Figure 4 or upward as viewed in Fig ure 11 whereby annular groove I86 interconnects pressure port I8I with port I14. This results in an immediate flow of ?uid pressure to cylinders I41 and I48 of a control valve I49. This valve I11 and I19 whereby the latch levers I53 and I09 has a plunger I50 which is normally urged in one are withdrawn, causing plunger I50 to shift down, direction by a spring I5I to an automatic tracer and the plungers 58 and M to shift to the left and control position. It may be moved by a rotatable to the right respectively ‘by spring “0. This crank I52 against the resistance of spring I5I to places the eccentric I58 under automatic control a manual control position and latched in that po of the tracer I04. sition by a spring-pressed latching lever I53 which The motor ports I65 and I66 now become con is engageable with a lug I54 projecting from the nected to ports I81 and I88 and thereby through crank I52. When the plunger I50 is in the posi channels to tracer valve ports I14 and I89 re tion shown the ports I41 and I48 are connected by grooves in the plunger to exhaust ports I55 and I56 20 spectively. Since the channel I16 is already under pressure as previously explained and has a branch respectively. connection to port I81, fluid pressure will ?ow The reversing valve plungers H9 and I28 are through channel I63 to cause rotation of the held by springs I51 into engagement with an ec hydraulic motor I62. This is permissible because centric I58 which is operatively connected to a the port I89 is connected to the exhaust port I15. gear I59. The rotary position of the eccentric The hydraulic motor will continue to rotate until determines the relative positions of the reversing the tracer ?nger is held in a balanced position by valves and thereby the direction of resultant the pattern with the tracer valve I12 in a central movement of the cutter. The gear I59 is con position. This means that the pattern is acting nected through an intermediate idler I60 to a pinion I6I integral with a rotatable hydraulic ,' to restrain excessive deflection of the tracer and that the spring I13 is continuously urging the motor I62. The hydraulic motor is connected tracer into engagement with the pattern. by channels I63 and I64 to ports I65 and I66 re A balanced condition will bereached in which spectively of valve I49. When this valve is in the spool I90 of the tracer valve is centralized the position shown, these ports are connected by with respect to the port I15 and a second spool annular grooves in the valve to reservoir ports I9I is centralized with respect to a reservoir port I61 and I68. I92. When the spool I90 is centralized with re It should now be evident that the two revers spect to the port I15 flow either to or from the ing valves H9 and I28 are hydraulically con-V motor I62 will be stopped whereby the motor nected directly to the opposite ends of the table cylinder, and to the opposite ends of the vertical 40 will stop, and the parts are now conditioned whereby any shift in movement of the spool I90 cylinder I9 respectively for controlling reversible will cause connection of the pressure port I8I to operation of the connected slides. The particular either the port I14 or port I82 to port I89. manner in which these valves control or propor This portion of the tracer valve now acts as a tion the ?ow to these two cylinders to proportion reversing valve to control reversible rotation of the rates of simultaneous movement thereof is ~ motor I62 and a resultant variation in the direc more particularly described and claimed in the tion of movement of the table and vertical slide, co-pending U. S. application Serial No. 409,171, the other spool I9I, being centralized with re ?led September 2, 1941, now Patent No. 2,332,533, spect to the port I92, will act as a resistance to issued October 26, 1943. It is suf?cient to say that control the return ?ow from the slide reversing the eccentric I58 may be rotated manually by the valves through channels I45 and I46 respectively. hand wheel I69 shown in Figure 4 to control the Due to the downward shifting of the plunger direction of resultant movement of the table and I50, the ports I41 and I48 will become connected vertical slide, or in other words, control the path to ports I93 and I94 and thereby through chan of movement of the cutting tool I10 shown in nels I95 and I96 to ports I91 and I98 in the tracer Figure 2 which is attached to a rotatable spindle . valve. Attention is invited to the fact that when I1I mounted in the spindle carrier 21. This the tracer valve is centralized or in a neutral po manual rotation may be accomplished with the sition the ports I91 and I98 are partially open and valve I50 in the position shown because at that the spool I9I is smaller in width than the port time the hydraulic motor I60 is connected to _I92 whereby a pressure opening exists on either reservoir and thus o?ers no resistance to the side of the spool to permit return ?ow from both movement. 9 of channels I95 and I96 to the reservoir channel The tracer valve I03 controls automatic rota I99. It will now be evident that any shift of tion of eccentric I58 and has a valve plunger I12 the tracer valve and thereby of the spool I9I in which is normally urged in one direction by a either direction will restrict the ?ow from both of channels I95 and I96 to the reservoir line I99. spring I13 and when the tracer is out of engage This restriction of flow in channels I95 and I96 ment with the pattern the plunger I12 may be tends to slow down the rate of operation of the urged to its lowest position as viewed in Figure 11 which results in a port I14 being connected to a reservoir port I15. The port I14 has a chan nel I16 which branches to a ?rst cylinder I11 table and vertical slide during a change in their direction of movement caused by rotation of the hydraulic motor I62. It should now be clear that the tracer ?nger I04 can be connected to auto containing a piston I18 operable to disengage the matically control the path of movement of the latch I53, and to a second cylinder I19 contain cutting tool in two directions, or in other words, ing a piston I80 for disengaging the latch I09. in any direction in a vertical plane and that by 75 The tracer valve has four pressure ports I80, I8I, 7 2,412,549 shifting the valve plunger I50 and latching it in the position shown in Figure 11 that'the relative direction of movement of the cutting tool with respect to the work may be manually guided or controlled by the steering wheel I69 and that this control may be cut out or stopped by the shift ing of valve plungers 58 and 4I into the position shown in Figure 11, resulting in the two cylinders I3 and I9 being reconnected to the servo-valves for control thereby. The crank I 52 which operates the control valve I50 is mounted on a shaft 200 which projects through the top of the tracer valve housing 20I " ing from opposite ends of the cylinder 28 are thus automatically connected to the tracer controlled valve I05 upon de?ection thereof. The valve 14 thus serves to automatically disconnect the cross slide cylinder 28 from the servo-control valve 05 and connect it to the tracer control valve when the tracer I06 is deflected by a pattern or master. Such de?ection may be effected by rotating the servo-screw 80 to feed the cross slide in, and as 10 soon as the tracer engages the master and be comes de?ected sufficiently to shift the tracer control valve to cause admission of pressure to port 22I, the change-over is automatically ef as shown in Figure 4 where it is provided with a fected. control knob 202. The crank I01 which is opera 15 In addition, the valve 13 has a pressure port tively connected to the valve plungers 4I and 58 229 which becomes connected to port 230 via and mounted on the shaft I08 may be rotated by groove 23I whereby ?uid pressure is forced a crank 203 as shown in Figure 1 which is op through a check valve 23I' into channel 232 and eratively connected by linkage 204 to a lever 205 shown in Figure2 which is secured to the upper 20 thereby to cylinder 233. This cylinder contains a piston 234 for disengaging the half nut 235 end of a rotatable rod 206..- This rod is provided from the servo-screw. This is necessary because with an operating handle 201 whereby upon rota slide actuation is now effected directly by the tion thereof the lever I01 may be rotated. It piston 29 and since no means are provided for, will be noted that the latch I09 can only be dis rotating the servo-screw it is necessary to disen engaged by hydraulic pressure in the cylinder 25 ease the nut. I19 and therefore when the latch is engaged the Attention is called at this point to another in lever I01 cannot be manually rotated. There terlock which exists between the servo-screw 80 fore, the lever 201 can only be utilized to rotate and the other tracer controlled valve in that in the crank I01 in a clockwise direction, but not in rotating the servo-screw 80 to feed the cross slide a counterclockwise direction. ' The in and out movement of the spindle car 39 in, the operator may cause accidentalengage ment of the tracer ?nger I04 with a master or rier 21 toward and from the work support, or in other part of. the work support while setting up other words, the depth control movement may be the machine and cause damage or breakage of automatically controlled by the tracer I06 pre the parts. To prevent this the tracer valve I 03 viously referred to, and this tracer which is shown 35 is provided with the pressure port I80 as'previ ously mentioned and when the plunger I12 is ex nection indicated generally by the reference nu cessively shifted in an axial direction the port in detail in Figure 3 has a ball and socket con meral 208 with the valve sleeve 209. A spring I80 is connected by an annular groove 236 in 2I0 acting on the upper end of the sleeve and operating through the ball and socket connection 40 plunger I12 to a port 231 which is also connected to channel 232 leading to cylinder 233 in the cross tends to hold the tracer I06 in a central or un slide housing which contains the piston 234. de?ected position, the tracer being provided with This piston is adapted to engage the end of a piv a spherical journal 2I I- by which it is supported oted nut member 235 and cause disengagement in the end of the housing I05.‘v of the nut member from the servo-screw 80, -Upon lateral de?ection of the tracer the valve 45 thereby rendering the screw ine?ective to cause 209 will be caused to move axially toward the further movement of the cross slide, or in other right as viewed in Figure 3. When the tracer is words stopping the Cross slide so as to prevent unde?ected a pressure port H2 in the valve hous ing and supplied from channel I 33 is connected by an annular groove 2I3 to channel 2I4 which terminates in a port 2I5 of valve 14. Another port 2I6 in the tracer is connected by annular groove 2 I 1 to a reservoir port 2I8. The port 2I6 is connected by a channel 2I9 through a direct connection to a port 220 in valve 14, and a branch connection to a port 22I but this connection is through a. resistance coll 222. damage to the tracer ?nger. ' ' There has thus been provided a hydraulic con trol circuit for controlling three-directional rel_ ative movement automatically and simultaneous ly between a cutting tool and a work support which utilizes two tracers, one of which controls reversible operation in two of said directions, and the other‘of which controls reversible operation in a third direction and including means where by- either of said tracers may be rendered inef The valve plunger 14 is normally maintained fective simultaneously rendering manual controls in the position shown by a spring-pressed plunger eifective; means whereby only one of said tracers 223 and the bore in which this plunger slides 60 may be rendered ineii'ective so that manual steer is connected by a~ drilled hole 224 to port 2I5 ing in a givenplane is rendered possible; and whereby whatever ?uid pressure exists in chan suitable interlocks between the tracer control nel 2I4 is communicated to the end of the plunger 223 to assist in holdingv the plunger 14 in the position shown. When the tracer I06 is de?ected 65 directions either by manual or power-means. the pressure port 2 I2 is connected by the annular The structure for supporting these tracers for groove 2I1 to port 2I6,whereby the ?uid pres independent operation in guiding the relative sure will ?ow through the resistance 222 and port movement between the tool and work and in a 22I to the chamber 225 at the lower end of plung er 14, thereby urging that plunger upward against 70 manner each independent of the other will now be explained. It will be noted from Figures 1 vthe resistance of the spring-pressed plunger 223. and 2 that the spindle carrier 21 is supported for This movement will be su?icient to connect two-directional movement, and this spindle car " port 2| 5 by way of annular groove 226 to chan nel 18, and port 220 by way of annular groove ' rier has a self-contained transmission including 221 to channel 11. The channels 11 and 18 lead 75 a prime mover 238 which is attached to the rear of the carrier by a bracket 239 so as to be mov 2,412,049 able therewith for driving the spindle I'll which holds a cutting tool I18. Opposite the cutting tool and mounted on the table II is a work sup porting bracket 240 and on top of that is a pat tern or master supporting bracket MI. The bracket 24I rests on the top surface of the brack 10 and connecting shaft indicated generally by the reference numeral 261 in Figure 5 to an operating handle 268 mounted on the rear of the housing 262 as shown in Figure 2 and adjacent to the lever 266. The saddle 253 carries a knee 269 which is sup ported in guides 218 and 2H formed on the et 248, and a central pivot 242, Figure 9, inter saddle and translation or adjustment is effected connects the same whereby the bracket may be by means of a rack bar 218’ which is attached to angularly adjusted. In addition, the upper the saddle, and a pinion 21I’ which intermeshes 10 bracket may be adjusted back and forth by the with the rack and is attached to the end of a shaft adjusting screw 242'. 212 which is journaled in the knee and provided Thus, the face 243 may be adjusted relative to with an operating handle 213. The knee 269 is the face 244 of the bracket 248. The screws 243' provided with guide surfaces 214 and 215, Figure at either end serve to swivel the upper bracket. 4, for guiding the tracer housing 28I . The tracer The purpose of this adjustment is that after the housing 28I contains the tracer control valve I83, pattern or master is attached or bolted into place the selector control valve I49, the two reversing on the face 243 the longitudinal surfaces may be valves I28 and H9, together with the eccentric slightly out of line with the direction of travel I58 and the power driving mechanism therefor of the table and by this simple adjusting means . correction may be easily effected without dis 20 including the hydraulic motor I 62. The eccentricity of the eccentric means I58 turbing the various clamping means by which the may be varied or adjusted by the truncated cylin pattern or master has been secured in place. drical member 216 which has a shifter collar 211. In a tracer controlled machine of the charac As shown in Figure 5 this collar is engaged by an ter described it is necessary that the tracer par eccentric pin 218 attached to the end of a shaft take of the movement imparted to the cutter 219 journaled in the wall of the housing and this in order that control may be maintained. Since shaft is provided with a gear segment 288. A the two tracers I84 and I86 are coupled for con pinion 28I attached to the end of a shaft 282 trol of a single tool it is necessary that they be serves to rotate the segment and thereby the pin responsive to the movements of the spindle car 30 218 to shift the collar 211. rier and therefore are mounted on the carrier. The shaft 282 is journaled in a plate 283 and To this end a tracer bracket, indicated gener provided with a bevel gear 284 which intermeshes ally by the reference numeral 245 in Figures 1 with a bevel gear 285 arranged at right angles and 2, has been provided with a dovetail guide 246 thereto. The bevel gear 285 is attached tothe formed on the bottom thereof for reciprocation in the dovetailed guideway 241 formed on the top 35 end of a shaft 286 which is journaled in a housing 281. The housing 281 is bolted to the plate ‘283 of the spindle carrier 21. and this plate is capable of limited angular ad Referring to Figure 5 the underside of the dove justment to change the angle of the depending tail guide 246 is provided with rack teeth 248 shaft 286 to suit the convenience of the operator. which are adapted to be engaged by a pinion 249 which is attached to the end of a shaft 258 40 This is accomplished by providing the plate 283 with elongated slots 288 at opposite ends as shown which is journaled in the carrier 21 and provided in Figure 10 through which pass clamping bolts with a hand wheel 25I shown in Figure 2. Rota 289. The shaft 286 extends through pendant arm tion of this hand wheel serves to adjust the tracer 298 which is secured to the housing 281 and the bracket toward and from the pattern support 45 projecting end of the shaft 286 provided with an and also relative to the cutting tool I18. operating lever 29I. A graduated collar 29Ia is The tracer bracket is provided with a vertical ?xed with handle 29I and movable therewith rel guideway 252 on one face upon which is mounted ative to a ?xed reference mark 29Ib to indicate a saddle 253 for carrying one of said tracers and the feed rate setting. This makes a convenient a saddle 254 for carrying the other tracer. Means are provided whereby these saddles may 50 arrangement whereby the operator may change the rate of tracing or relative feeding between be independently adjusted relative to one an cutter and work from his position on the ?oor. other and this means comprises two elevating The tracer housing 28I may be adjusted on the screws 255 and 256. These screws are journaled guideways 214 and 215 by means of a screw 292 for rotation in opposite ends of the bracket and as shown in Figure 5 the lower end of screw 256 55 which is threaded in a nut 293 depending from the underside of the housing 28I. The screw is is provided with a bevel gear 251 and the lower journaled in opposite ends of the knee and is pro end of screw 255 is provided with a bevel gear vided with a square and 294 as shown in Figure 5 258. The screw 256 is threaded in a nut 259 car for attachment of a. removable wrench. ried by the saddle 253. The saddle 254 is supported on the guideways The screw 256 is adapted to be manually ro 60 252 and operatively connected to the screw 255 by tated to eifect adjustment of the saddle 253 by means comprising a bevel gear 268 which is' keyed to a shaft 26I in a position to mesh with the bevel a half nut 295 as more particularly shown in Figure '7. The half nut is formed on the end of a retractable plug 296 which is slidably mounted in the saddle 254 as more particularly shown in gear 251. The shaft 26I extends longitudinally through the base housing 262, Figure 2, of the 65 Figure 8. The plug is held against rotation by a bracket 245 where it is provided with another pin 291 engaging a slot 298 formed longitudinally bevel gear 263 for engagement with a bevel gear of the plug. A pin 299 eccentrically mounted on 264 attached to the end of a shaft 265 which is the end of a shaft 388 engages a slot 38I formed journaled in the wall of the housing 262 and in the plug whereby rotation of the shaft will provided with an operating handle 266. It will effect disengagement of the half nut 295. The now be evident that rotation of the handle 266 shaft 388 may be rotated by a handle 382 locked will effect adjustment of the saddle 253 which to effect shifting of the nut. supports the two-directional tracer I84. To insure against any possibility of the saddle The bevel gear 258 which operates the screw 255 is similarly connected through bevel gearing 75 dropping when the nut is disengaged a counter 11 9,419,549 balance is provided comprising a counterweight l 334 shown in Figure 5 which is connected by a chain 335, passing over a pulley 360, Flgurel, to the saddle 254 as shown in Figure 6. The object of providing a disengageable nut on the saddle is to make it possible to lock the sad dle against vertical movement with respect to the ' tracer bracket so that a plate template lying in a horizontal plane may be utilized as a pattern for the depth control tracer which would be pos sible where the work is to have a uniform cross 12 which has a second shoulder 323 engaging the end of a pivot lever 321. The other end of the lever engages a trip rod 323 which is normally urged in one direction by a spring 329 interposed be tween a ?xed part of the support 3 I0 and a collar 330 attached to the rod. When the rod 322 is pushed upward it rotates the rocker shaft and thereby the lever 321 and pushes the trip rod 328 upward against the re sistance of spring 329 and causes actuation of the _ limit switch 32 I. section. This would‘ be produced by reciprocat Occasion may arise where it may be desirable ing the table, and at the end of each table stroke to utilize a plate template with the lower tracer indexing the cutter laterally, i. e., in a vertical I04, in which case the tracer could not be re direction. 15 sponsive to in and out movements of the carrier By looking the saddle against vertical move 21 as dictated by the upper tracer I00. Means ment this indexing movement would not be im have, therefore, been provided for rendering the parted to the tracer whereby it would remain in lower tracer support non-responsive to control alignment with the plane of the template. To movements of the upper tracer. This means com this end the saddle 254 is provided with a detach 20 prises an arm 33I which is attached to the top of able bracket 303, more particularly shown in Fig the vertical slide I1 as indicated in Figure 1. As ures 3 and 6, which may be secured to the saddle 254 by a pair of screw threaded members 304 having knurled operating knobs 305. The shown in Figure 4, this arm has a slotted plate 332 attached to the end thereof and the cross slide 269 of the lower tracer support has a gooseneck bracket is provided with a key 303 which is 25 arm 333 projecting from the rear end thereof adapted to ?t in a key slot 301 formed'on the in which is mounted a bar 334 which is of rec saddle 254. The upper end of the bracket is pro tangular cross-section and is positioned to extend vided with a roller 303 which is adapted to ?t in across the face of the plate 332. The bar 334 sup a longitudinally extending slot 309 formed on a ports a clamping member indicated generally by ?xed support 3I0. This ?xed support is secured 30 the reference numeral 335 and this clamping as by bolts 3 I 2 to the end of a gooseneck arm 3 I3 member comprises front and rear members which which, as shown in Figure 1, is attached to the are hinged together by a pin 336. top of the column I5. By providing the roller connection it will be obvious that the tracer sup The clamping bolt 331 is pivotally connected to the rear member by a pin 333 and is adapted to swing down between a pair of ears 339 formed on the front member. A threaded member 340 is threaded on the bolt and is adapted to draw the front and rear members together in clamp port will move toward and from the work support whenever the carrier 21 is moved, but when the carrier is moved vertically by the slide I1 the tracer bracket 245 will move up and down rela tive to the saddle 254. ing engagement with the bar 334. The clamping An interlock is provided to insure that the 40 member carries a roller 34I which ?ts in a slot half-nut 295 is disengaged from the screw 255 342 in the plate 332. It will, therefore, be appar whenever the bracket 303 is placed in position ent that when the bar 334 is clamped to the plate and this includes an interlock pin 3“ which is 332 by the clamping member that the slide 269 is slidably supported in a bore 3I5 in the saddle 254 held against axial movement but the entire struc and adapted to project into key slot 301 as shown 45 ture is still capable of vertical movement. When in Figure 7 whereby when the bracket is placed thisl is done, handle 213 is pulled out to disen in position the key 306 will shift the interlock pin gage the pinion from the rack. to the right as viewed in Figure 7. The inter Iteis thus possible to hold the tracer I04 against lock pin has a bevel connection 3I6 with the end movement as dictated by the upper tracer of a shifter rod 3I1 which is continuously urged 50 axial I06. in one direction by a. spring 3I8. The rod 3" has Remote control means have been provided for a slot 3I3 into which ?ts a pin 320 mounted actuating the depth control tracer valve in such crosswise of the shaft 300 as shown in Figure 8. a manner as to effect disengagement of the tracer Therefore, when the shifter rod 3" is depressed from its pattern. Referring to Figure 11 it was it will cause rotation of the shaft 300 and thereby 55 stated supra that the valve 13 is automatically through the eccentric connection 299 cause with shifted upon de?ection of the tracer I08 to effect drawal of the half-nut 235. control connection between the tracer valve and With the upper carrier clamped against vertical the cylinder 20. Once this connection is estab movement and the tracer bracket 245 free to move lished it can only be broken by shifting the tracer up and down there is a possibility of collision be 60 control valve in a direction corresponding to ex tween these two brackets and in order to prevent . cessive de?ection of the tracer, or, in other words, damage to the parts an interlock is ‘provided interconnection of ports 2| 2 and 2I6. which is effective to reduce the pump pressure in Since the tracer I06 is inaccessible to an op the system because such a movement would be produced by the introduction of ?uid pressure to 65 erator standing on the ?oor beside the machine a remote control connection is provided for this the lower end of cylinder I9 as viewed in Figure 1. purpose. This is accomplished by providing a limit switch This includes a remote control ?exible shaft 32I which when operated shuts down the motor indicated generally by the reference numeral 342 32I’ that drives the pumps I38 and I31. The saddle 254 as shown in Figure 6 has a rod 70 in Figure 3. The ?exible wire 343 which extends through a ?exible sleeve 344 is connected, to an 322 slidably mounted therein and projecting be operating rod 345 which has heads 346 and 341 low the lower end thereof for engagement by a formed on opposite ends thereof. The rod 345 lug 323 formed integral with the saddle 253 as is slidable relative to a cover plate 348 attached shown in Figure 5. The upper end of the rod 322 engages a shoulder 324 on a rocker shaft 325 75 to the end of the tracer valve plunger 209. A spring 340 acts on the head 34'! to hold the rod 2,419,549 13 14 cluding a first pattern controlled automatic in such a position that the head 343 will not interfere with the normal operation of the valve. When it is desired to shift the valve the wire 343 is pulled until the head 346 engages the plate 348 against the resistance of spring 349 after tracer for governing two directions of said move ment, at second pattern controlled automatic tracer for governing a third direction of said rel ative movement, said tracers being mounted on one of said supports, said other support being which further movement will shift the valve plunger to e?ect the necessary interconnection of ports H2 and 2l6 which will cause admission adapted to support patterns in opposition to said tracers, control interconnections rendering each tracer adaptable to control at least one direction of fluid pressure to cylinder 28 in such a direc 10 of relative movement between the other tracer tion as to move the tracer out of engagement with and its pattern, and means for rendering one of the pattern and after the separation has been said tracers non-responsive to a direction of effected the wire 343 is released whereupon the movement controlled by the other tracer. tracer valve assumes its normal unde?ected posi 3. In a pattern controlled machine tool having tion under the in?uence of spring 2H1. a cutter support and a work support mounted for 15 This will result in the port 2l6 becoming con three-directional relative movement, the combi nected to the exhaust port 2l8, thereby relieving nation of means for automatically controlling the pressure on the lower end of piston 14 which the three directions of movement simultaneously will be returned to its normal position and there including a ?rst pattern controlled automatic by disconnect the tracer from control of the pis tracer for governing two directions of said move 20 ment, a second pattern controlled automatic ton 29. The ?exible sleeve 344 is connected to a ?xed tracer for governing a third direction of said bracket 350 and the wire is connected at 35l to relative movement, said tracers being mounted a collar 352 attached to a rod 353. This rod is on one of said supports and the other support slidable within the tubular member 206 which as being adapted to support patterns in opposition shown in Figure 12 has a pair of elongated slots to said tracers, control interconnections render 354 formed in opposite sides thereof. A pin 355 ing each tracer adaptable to control at least one which passes through the rod 353 extends through direction of relative movement between the other these slots to connect the hand grip 356 to the tracer and its pattern, and means for rendering either tracer non-responsive to the control action rod. 30 It will now be obvious that by vertical move of the other tracer. ment of the hand grip 353 the tracer valve may be 4. In a pattern controlled machine tool having remotely controlled to effect disengagement ‘of a cutter support and a work support mounted the tracer by pulling upward on the hand grip. for three-directional relative movement, the com The tracer valve housing I05 is slidably connected bination of means for automatically controlling by a dovetailed guideway 351 on a knee 358 and cross movement thereon is effected by the cross the three directions of movement simultaneously including a ?rst pattern controlled automatic screw 359. A clamping member 350 is threaded tracer for governing two directions of said move in the tracer valve housing support for clamp ment, a second pattern controlled automatic ing the parts after adjustment. The knee 358 is 40 tracer for governing a third direction of said supported by dovetailed guideways 36l for move relative movement, said tracers being mounted on ment relative to the bracket 254 by means of an one of said supports, said other support being adjusting screw 362 having an operating handle adapted to support patterns in opposition to said tracers, control interconnections rendering each 363. By means of the two adjusting screws 359 and tracer adaptable to control at least one direction 363 relative adjustment may be e?ected between of relative movement between the other tracer the tracer I06 and tracer I04. and its pattern, and selective means for render There has thus been provided an improved au ing either tracer non-responsive to a controlled tomatic pro?ling and die-sinking machine which direction of movement of the other tracer. utilizes a pair of tracers, one of which automati 5. In a pattern controlled machine tool hav cally controls universal movement in a plane and r ing a work support and a tool support, means the other of which automatically controls rela mounting the tool support for two directions of tive movement between a tool and a work piece relative movement, a pair of tracers mounted on in a direction at right angles to said plane. the tool support for cooperation with patterns What is claimed is: carried by the work support, control connections 1. In a pattern controlled machine tool hav from one of said tracers for controlling one direc ing a cutter support and a work support mounted tion of movement of the tool support, control for three-directional relative movement, the com connections from the other tracer for controlling bination of means for automatically controlling the other direction of movement of the tool sup the three directions of movement simultaneously including a ?rst pattern controlled automatic 60 port, means to render one of said tracers non responsive to . the movement controlled by the tracer for governing two directions of said move other tracer, and interlock means to prevent col ment, a second pattern controlled automatic lision of said tracers when one of them is held tracer for governing a third direction of said rela against movement. , tive movement, said tracers being mounted on one of said supports, said other support being adapted 65 6. In automatic control means for a pattern to support patterns in opposition to said tracers, controlled machine tool, the combination of a pair and control interconnections rendering each of tracers, individual supports for each tracer, a tracer adaptable to control at least one direction common support for said tracer supports, means of relative movement between the other tracer to effect adjustment of one of said tracer sup 70 ports independently of the other including a rack and its pattern. 2. In a pattern controlled machine tool having and pinion, means to disconnect the pinion from a cutter support and a work support mounted for said rack, a ?xed support for said'common sup three-directional relative movement, the combi port, means to connect the adjustable tracer sup nation of means for automatically controlling the three directions of movement simultaneously in 75 port to the ?xed support whereby upon movement 15 2,412,549 " of said common support only one tracer support .‘ will be moved. ' 7. In a pattern controlled machine tool haying a bed, a work support mounted thereon, a col umn, a spindle carrier mounted on the column for vertical and horizontal movement, a tracer ' support mounted on the top of the carrier for 16 its ‘respective pattern, and other means for ad lusting the other tracer in engagement with its pattern. ' , L 12. In a pattern controlled machine tool hav ing a cutter support and a work support, the com bination with means for mounting said supports for three~directional relative movement of indi movement therewith, means onv the carrierfor vidual manually operable servo-motor mecha adjusting the tracer support toward the work sup port to effect control engagement of the tracer 10 nisms for each of said directions of relative move ment, a tracer mechanism having a de?ectable with a pattern, a vertical rod supported by the tracer mounted on one of said supports for auto column, a remote control ?exible shaft coupling matic control by a pattern carried by the other the rod with the tracer whereby actuation of the support, disconnect devices associated with each rod will cause movement of the tracer valve in a direction to eifect disengagement of the 15 servo-motor mechanism for rendering the same non-responsive to manual actuation, and means tracer from the pattern. ‘ ‘ operable by the tracer upon initial de?ection 8. In a pattern controlled machine having a thereof during movement in any direction by bed, a work support slidably mounted on the bed, any of said servo-motor mechanisms to effect a column, a spindle'carrier mounted on the col simultaneous disengagement of all of said dis umn for two-directional movement, a pair of tracers mounted on the carrier, a control valve associated with each tracer, a selector valve mounted on the column for connecting and dis connecting one of said tracer control valves with 20 connecting devices. , 13. In a pattern controlled machine tool hav ing a work support and a tool spindle carrier mounted on the machine for relative. movement in a plurality of directions and a tool spindle operating means for the movable parts, telescop 25 journaled in said carrier, the combination of a ing control elements mounted on the column, (pair of tracer. supports mounted onthe machine means connecting one of said elements to the selector valve, means to rotate said element to - and each, having a tracer extending substan tially parallel to the axis of said spindle, means effect shifting of said selector valve, means con ‘for adjusting said tracer supports relative to one necting the other element to one of said tracer 30 another including individual translating screws, valves, and means to effect axial movement of means to disconnect one tracer support from its the element to shift the tracer valve. translating screw and connect it to a ?xed part 9. In a pattern controlled machine tool. having of the machine whereby the-spindle carrier may a work support and a tool spindle carrier sup ported for relative movement in a plurality of 85 be bodily moved with respect to said tracer to change the spacing between said cutter spindle directions and a pair of tracer supports carry and tracer. ing automatic tracers mounted on said carrier, 14. In a pattern controlled machine tool hav the combination of means for adjusting said ing a work-support and a tool spindle carrier tracer supports relative to one another includ ing individual translating screws, means to dis 40 mounted-on the machine for relative movement in a plurality of directions, a tool spindle jour connect one tracer support from» its translating naled in said carrier, said carrier having a guide screw, a counterbalance for the disconnected way formed therein parallel to the axis of the tracer support and meansto connect said dis spindle, the combination of a bracket mounted "connected tracer support to a ?xed part of the machine whereby said spindle carrier may move 45 on said guideway, means to adjust said bracket parallel to the axis of the spindle, a pair of slides without moving said disconnected tracer sup port. mounted on said bracket for sliding movement normal to the axis of said spindle, a tracer head 10. In a pattern controlled machine tool hav mounted on each slide, a tracer mounted on each ing a cutter support and a work support, and tracer head and extending substantially parallel means mounting said supports upon the ma to the axis of said spindle, and individual means chine tool for relative movement in three di to adjust each tracer head parallel to or laterally rections, the combination of means for auto of said spindle axis to determine the spacing be— matically effecting and controlling said move tween the spindle and each of said tracers. ment including a rotatable direction determina 15. In a pattern controlled machine tool hav tor, a ?rst pattern controlled automatic tracer ing a cutter support and a work support, said operatively connected for actuating said direc supports being mounted on the machine for tion determinator and thereby determining the ‘ three-directional relative movement, the com resultant of two of the directions of relative bination of means for effecting and controlling movement, and asecond pattern controlled auto matic tracer for governing a :third direction of 60 said movement including a pair of automatic relative movement between said supports. tracer control mechanisms, a tool spindle Jour naled in the cutter support, tracer ?ngers asso 11. In a pattern controlled machine tool hav ing a cutter support and a work support, and ciated with each of said tracer mechanisms and means mounting said supports for three-direc tional relative movement, the combination of a arranged in parallel relation to 'said cutter spi'n dle, means controlled by one of said mechanisms for determining the direction of lateral movement of said spindle, means controlled by the other tracer mechanism for determining axial move the other of said supports, servo-motor mecha nisms each including a manually operable con ment of said cutter spindle, and rate control trol for producing each of said ‘three directions 70 means associated with the ?rst tracer control mechanism for determining the ‘rate of scanning of movement, one of said mechanisms being oper of the second tracer ?nger. able to move the tracers toward their respective patterns, means to render said mechanism inop EDWARD W. YATES. erative upon engagement of the ?rst tracer with pair of tracer mechanisms mounted on one sup port for engaging separate patterns carried by ‘I’AFI‘ s. ARMANDROFF'.