US2472902A - Cam making machine - Google Patents

Description

June 14, 1949. G, x JOHNSTQN 2,472,902

CAM MAKING MACHINE GEORGE X. JOH/VJTOM June 14, 1949. G. x. JoHNsToN CAM MAKING MACHINE 6 Sheets-Sheet 2 Filed July 15, 1947 G. X. JOHNSTON l om MAKING MACHINE June 14, 1949.

Filed July 15, 1947 6 Sheets-Sheet 3 v June 14, 1949. G. x. JoHNs'rN 2,472,902

cm MAKING MAcHINE Filed July 15, 194'( 6 Sheets-Sheet 5 F/G. ri.

GEORGE x. Jam/sro,

June 14, 1949.. G. x. JOHNSTON CAI MAKING MACHINE 6 Sheets-Sheet 6 Filed July 15, 1947 v IN V EN TOR.

@meer ix, Jol/mrow,

t, w.. n w r. .A

meteory Patented June-'14, A19,49

uNfirED STATES t PATENT "OFFICE George X. Johnston, St. Claim-Mich. Apgiisuenjuiy 1s, 1941, sensi Ne. 750,973

i1 einen. (ci. 's1-5o) This. invention relates to cam generating machines, and more particularly to a lmachine for manufacturing cams 'of either the radial or axial type without the use of master cams. v

A- main object of the invention is to provide a novel and improved cam formingmachine which issimple to operate, accurate in performance and readily adJustable for forming either radial cams or axial cams as desired.

A further object of the invention is to providey a novel and improved cam forming machine which may be employed togenerate cams of either the radial or axial type without the use of master "cams, said machine being sturdy in) construction,

' reliable in operation `and adjustablefor' a very widerange of cam designs.

A stillI further object ofthe invention is to disc-like planar.'element, or of the axial type. wherein the cam surface is generated along the longitudinal contour of an axially rotatable three-dimensional element, the generation of the cam in either type being' accomplished by moving a follower along a guide track formed to provide vertical movement of the generating follower in accordance'with the intended movement which itis desiredto lmpart'tothe cam follower which f must ultimatelycooperate with the finished cam,

the movement of the generating followerbeing transmitted to the cam forming tool andv the Ycam blank being rotated around a vertical axis synchronously with Further objects and advantages of the inventio'n'will become apparent from the following de- Y scription and claims, and from the accompanying drawings,'wherein: v

' Figure 1 is a -front elevational view partly in cross-section, andwith its front wall removed of a cam forming machine constructed in accordance with the present invention.

- Figure 2 is a vertical transverse cross-sectionall view taken on line 2 2 of Figure 1 and showing' the cam forming tool in operative position thereon. A

Figure 3 is-a top plan view of the cam forming machine of Figure 1 with the rotating means for the cam blank removed. l

. Figure 4 is a top plan view similar to Figure 3 but partly broken away to reveal internal struc- Figure 5 is a cross-sectional detail view ofthe themovement of said cam formin g collar of Figure 8L vertical guide support for the forming tool mechanism taken on line V5--5 of Figure 1.

Figure 6 is a cross-sectional-detai1. Viewv of the;v vvertical support 'for the forming taken on line 6-6 of Figure 1.

Figure '1 is a detail cross-sectional viewof the verticalisupportfor the forming tool mechanism `taken on line 1-1 of Figure 1.

Figure 8 is a rear elevationaldview -of a' bearing collar for gthe screw gear adjusting'. shaft einV ployed in adjusting the angle of inclination' of the follower. guide employed in the machine of .Figure-1.

Figure 9 is a side le'levational.\ 'ie w ofthe bear- Figure 10 is a side elevational dtail view ofa cam grinding t'ool which may beemployed on f the machine of Figure 1.

Figure 11 is -an end elevational detail view of a supporting bracket for acutting torch' which' I f may be employed on the machine of Figure 1.

l Figure 1 2 is aside elevational view of the torch "supporting bracket of Figure 11.

Figure 13 is a fragmentary side `elevational view of the cam forming machine of Figure 1 showing the indicating means for determining thel angle of adjustment of the follower guide.

Figure 14 is an enlarged plan detail view of a reversing mechanism employed in the machine of Figure 11 for reversing the motion of the cam forming tool with'respect to that of the cam Figure 15 is an elevational view' of the' reversing mechanism of Figure '14. Figure 16 is an enlarged cross-sectional'detail view taken on line |6-I 6 of Figure 2.

Figure 17 is an enlarged front elevational view of the adjustable securing means for the follower guide employed in the machine of Figurel.

Figure 18 is an enlarged cross-sectional detail view taken on line li 8 of Figure4.

Figure 19 is an enlarged cross-sectional detail -view taken on une la-l s of Figure 4.

Referring to the drawings, I I designates a, generally rectangular supporting table structure, said table structure comprising front and rear vertical walls I2- and I3, a left end vertical wall I4 and a right end vertical wall l5, said.vertica1 walls being rigidly secured together by any suitable means to define a rectangular enclosure. Secured in the top portion of the enclosure at the right end thereof is a horizontal bearing plate I6 on which is rotatively mounted an annular worm gear I1. Secured toiworm gear I1 is a circular face plate i8 which is formedat its top surface with a plurality of inverted T-shaped equally spaced radial grooves I9 for clamping a cam blank thereto. Face plate I6 is formed-with a depending annular flange 26 which seats on worm gear I1 and at which the face plate is secured by bolts 2I to the worm gear. An apertured bracket plate 22 secured to the walls of the table II receives the annular flange and overlies the worm gear I1 to restrain the worm gear and face plate against upward movement and translational movement in a horizontal plane while allowingsaid worm gear and face plate to rotate around a vertical axis. Meshing with Worm gear i1 is a transversely extending worm 23 carried on a shaft 24. Secured inside the table II adjacent the shaft 24 and below the bearing plate I6 is a transverse vertical plate member 25 and secured thereto below the shaft 24 is a horizontal bracketplate 26. bracket-21 which is pivoted at 28 to bracket plate 26. extends through bracket 21. Shaft carries at its lower end an eccentric 3| which `is rotatable in bracket plate 26. By rotating handle 3l in a horizontal plane the bracket 21 may be swung outwardly to disengage worm 23 from worm gear Worm shaft 24 is journaled. in a bearing as shown at 6I to an opstanding lug 62 carried A spective rack members 66, 66.

Threaded into the ends of follower guide 66 and passing through the slots '59, 59 are bolts 61, 6'! and secured to the ends of the follower guide are guide brackets 68, 68 slidably receiving the respective racks 66, 66. Secured to each bolt A vertical shaft 36 having a top handle-3I 61 inside a guide bracket 68 is a gear 69 meshing with the adjacent rack 66. The inner ends of the racks mesh with a gear 16 integrally secured on a shaft 1I extendingv through bearing aperture 64 in bracket'member 63, Shaft 1I is journaled in a `suitable Ybearing sleeve, shown at 12, secured to bracket member 63. Said sleeve and shaft project through front wall I2 and the shaft -is provided with a squared outer end 13 which is provided with a crank 1L Front wall I2 is horizon- I1, thereby permitting the face plate I8 to be i freely revolved if such is desired.

The end of worm shaft 24 is plvotally connected at 32 to a shaft 33 journaled in a bearing sleeve 29 secured to front wall i2, said shaft passing through the table wall I2 and terminating at its outer portion in a squared end 34 adapted to be engaged by a suitable operating crank 44. A

calibrated drum 35 is carried by shaft 33 and crank. Shaft 38 carries a calibrated drum 42' tally slotted, as shown at 15 to permit horizontalmovement of the sleeve 12 as the follower guide moves horizontally during the cam forming process. Front wall I2 is calibrated with an arcuate scale 16 concentric with the mid-point of slot 16. Secured to sleeve I2 by a collar member 12is' a pointer arm 11 which indicates the angle of adjustment of the follower guide on scale 16 whenA said follower guide is positioned so that shaft 1i is concentric with the arcuatescale` 16. Arm 11 is also employed as a handle to vary the angle of the follower guide when the clamping bolts 61 are loosened. i,

By rotating handle 'I4 in one direction the racks 66, 66 loosen the gear bolts 61, 6'14so that the fol. lower guide 60 may be set in a desired position of inclination. By ,rotating handle 14 in the opposite direction the racks 66, 66 tighten the gear bolts to s'ecure the follower guide 66 in its adjusted position in the arcuate slots 59, 59-of the arms Secured to the rear'wall I3 of the table II is a vertical column member 18 and interlocked therewith for sliding movement in a vertical diand wall I2 carries an index pointer 43'over-lying the periphery of drum 42 for indicating the degrecs of rotation of face plate I8 when the shaft 38 is employed to rotate same.

Journaled in the table iljin a bearing sleeve 44 secured to wall I2 below bearing sleeve 29 is a transverse shaft 45 extendingthrough wall I2l At its outer portion shaft 45 carries a gear 46 which meshes with a smaller gear 41 carried by shaft 33. Shaft 45 is connected through a re` versing clutch 48 to a shaft 49- journaled in a bearing bracket 50 secured to the transverse plate mmeber 25. Shaft 49 carries a worm'5i which rection is a'blook member 19. Block member 19 has secured thereto a forwardly projecting horizontalA shaft v8Il on which is journaled a follower roller'SI having a peripheral flange 82. Roller 8| overlies the top surface of follower guide 66, said follower guide top surface being formed with a groove 83 adapted to receive the flange 82 to meshes with a worm gear 52 carried on a vertical shaft 53 suitably journaled in bearing bracket 50.

The bottom end of shaft 53 is journaled in a bear? ing 54 suitably securedto the rear table wall I3 by means of a bracket member 55. The bottom end portion of shaft 53 carries a gear 56. Bracket member 55 is formed with a longitudinally ex-y tending horizontal -gudeway Iin which is slidably positioned a rack member 51 which is in mesh with the gear 56. Rack member 51 carries a pair of opposed upwardly projecting lslotted arcuate arms 58, 58 and adjustably secured in thearcuate slots 59, 59 thereof is an inclined follower guide 66, plvotally connected at itsmid-poi-tion,

maintain the roller in tracking engagement with l the follower-guide top surface at all times. When the rack 51 is moved to the left, as viewed in Figure 1, block 7 9 therefore rises and when the rack 51 is moved to the right, block 19 is allowed to drop, The degree and direction of vertical movement of block 19 for a given motion of rack 5l is of course governed by the angular position of adjustment of the follower guide 66.

The sliding engagement o f block 19 with column member 18 is in a vertical groove 84 formed v in said column member, as'shown in Figure 6.

v horizontal forwardly extending support member 81 which is formed vwith a longitudinal dovetail guide track 88. Slidably engaged with guide track 88 is a support member 69 which extends transversely with respect to table' II and is longitudi- 5 nally `adjustable thereon. ,formed with a transverse dovctail guide track 90.

slidably. engaged with guide track'90 is a tool.

support 9| which is ,adjustable along the length of guide track 90. Bymoving support member v,89 along guide track 88 and by moving tool suppQrt adjusted to' any position in a Ihorizontal plane in SLUPbOrt member 89 is 9| along guldeftrack 90, said tool support may be 1 an area defined by the length of longitudinal track 88 and transverse track 90. Y

` T ool support 9| may be manually adjusted on guide track 90 by means of an adjusting screw 92 Journaled in the forward portion of supportl member 89 and 'threadedly engaging a nut 93 carried by the tool support and depending therefrom into-a transversely extending slot94 formed in the support member 89. An operating handle 95 is secured to the outer end of screw 92.

The guide track 88 is formed with a longitudinal groove 96 and slidably positioned therein at the left end of the track 88 is a block member 91 Journaled in block member 91 is a screw` member 98 which threadedly engages ay nut 99 carmember and shaft |05 to raise the rack bar y|08 to its desired position- When a radial c am.

is to be formed the projections |2 are engaged in the gear openings.||3, thus coupling the longitudihal rack bar member |03 to the vertical rack ybar |08 in the manner above described. When an axial camis to be formed, vertical rack bar |08 is locked in anelevated inoperative position.

.In its upper portion, column `member 18 is formed with a vertical rectangular groov'e H5 in which is slidably positioned a -rectangular collar. member I6 secured to kneemember 86. slidably .received incollar member I I6 and non-rotatively keyed thereto isa vertical screw ||1 whose bottom end is adapted to engage the, block 19, 'whereby vertical movement of said block )19 may be transmitted to the knee member 86. Rotatably engagrled by support member' 89 and depending there- I' from into groove.96. An operating handle |00 is secured tothe outer end of screw member 98, whereby support member 89 may be manuallyad- 'justed longitudinally with vrespect to the block member 91.V Block m'ember 91 may be locked to track 88 ina desired position of adjustment thereof relative to the support member'89 by a locking pin |0 I.' Secured to block member 91 by bolts |02 is a longitudinally extending bar member or rack |03 carried vin groove 96 and formed at its bottom' surface with rack teeth. Extending through an opening |13' 'formed in the bottom wall oi the inner portion of groove 96 and meshing with said rack teeth is a. gear|04 freely rotatable on a transverse shaft |05I journaled to the bottom of support member 81. Shaft |05 carries at' its rear end a gear |06 which isV received in a vertical groove |01 formed in the column member 18.` P- sitioned vertically and slidably in said groove |01 bottom end of rack bar `|08 is adapted to engage the top surface of block 19, whereby vertical .movement of said block will be transmitted to said rack bar', causing gear |06 and shaft |05.to rotate.

A sleeve member |'|0 is slidably mounted on shaft |05 so as to be movable axially thereon butis keyed to said shaft so as to rotate therewith. Sleeve member |'0 carries a clutch collar having projections ||2 adapted to be Aengaged iny openings ||3 formed in gear |04. At its outer end, sleeve memberI |0 is provided with a squared is a rack bar |08 meshing with gear |06. The

stud'||4 which may be engaged by a suitable wrench or crank. i

When sleeve member ||0 is in an inwardly ading the bottom portion Aof collar member ||6 is a nut member ||8 threadedly engagedV with screw ||1 and having a bottom flange underlying collar member |18 and formed with bevel gear teeth. Thus, as screw ||1 is raised by block 19, the nut ||8 is raised carryingwith it col1ar` ||6,`knee member 86 and support 81. Likewise, as the nut ||8 is lowered, collar ||6I and the'related parts ride downwardly with it. The bevel gear portion of nut member ||8 is meshed with a bevel gear ||9 carried at the end of a. horizontal shaft |20 ASupported on the top of vcolumn member 18 is a shouldered collar |22 through which the vertical screw ||1 passes. A nut |23 is threaded on rscrew |'|1 above said' collar by means of--which the screw ||1 may at times be lifted so that its lower end is above the range vof vertical movement of block 19 and may be thus locked in an inoperative position, as when radial cams are to be formed. When axial `camsvare to be formed,

the screw member ||1 is in alowered position so that its bottom end engages the block 19 and the knee member 86 follows the vertical movements of said block.

Any. suitable camformng tool may be secured to the tool support.9|. Figure 2 shows 'a motor- /driven grinder |24 mounted on said tool support.

The tool support i'sprovidedwith a collar portion |25 in which a depending stud |26 carried by the toolv may bev received and secured by suitable clamping'screws |21., Figuresll and 12 show a r bracket |28 which `may be secured to collar portion |25 in the same manner as the grinding tool of Figures Zand 10, said bracket being adapted to clampingly receive the shank portion |29 of a ljusted position so that projections ||2 are seated in the gear openings I3, rotation of shaft |05 will be transmitted to gear |04 to thereby cause rack bar member |03 to move longitudinally in groove 96. This in turn moves support member 89 longitudinally on track 88 due tothe connection oi.

rack bar member |'03 with said support member 89 through block 91,'screw 98 and nut 99.

Vertical rack bar |08 may be raised to a position wherein its lower end will not engage the block 19 during the movement of said vblock and may be locked in said inoperative position by a suitable nut, such as is shown at |09. The elevation or` 'adjustment of rack bar 08 is accomplished by disengagingth'e sleeve projections ||2 from the gear |04,. engaging the stud ||4 byla suitable wrench or crank and thereby manually rotating thesleeve holder for a cutting torch. 4

Figures 14 and 15 illustrateV the details of the reversing clutch 48 employed for reversing the shaft' 49 with'respect to'shaft45 when it is dev sredto obtain a. reversal of the direction of movement of the follower guide 60 with respect to the direction of'rotat-ion of the faceplate I8.V Clutch 48 comprises a bottom supporting plate |3| having vertical arms |32, |32 which are secured' to the transverse vertical plate 25 of the table I| e to thereby support plate |3I in a horizontal position. Secured to bottom plate 3| are .opposed unstandng bearing brackets |33 and |34. Shaft 45 is journalled in bracket |33 and carries at its inner end a gear formed with a toothed clutch vface |36. Shaft 49 is journalled in bracket |34 and terminates adjacent the toothed clutch face` slidable onthe end of shaft 49 is a sleeve member |31 having a flrst toothed clutch kface |38 opposaavaeoa |38 but is spaced therefrom. Keyed to but axially from a comparatively simple shape (of follower guide) in most cases, and by having that motion ing clutch face |36 and an opposite toothed :clutch Y face |38. Rotatably mounted on shaft 49 adjacent the bearing bracket |34 is a gear l|40 having,

.under separate control it becomes much easier to produce or modify a cam than in the conventional method of combining the two components f of motion by the use of a master cam as the tool a toothed clutchfface |41 opposing clutch `face |39. Journalled in bearing brackets |39'an'd |34 is a first couhtershaft |42 carrying a gear .|43 meshing with gear |35 and journalledin said bearing brackets .is a second countershaf-t |44 carrying a; gear |45 meshing with both gear l|43 l and gear |40. A suitable shifter rod, not shown, isj

employed-toshift sleeve member' |31 axially, so

that in one position of vsaid sleeve member the the interlocking clutch faces 14| and |39 to shaft 49, causing shaft 49 to rotate in ,a direction opposite to the direction of rotation of shaft 45:

In operation of the machine, the cam blank is centered on the face plate I8 and secured thereto by suitable clamps. If a radial cam is to be formed, the screw i |1 is elevated to an inoperative position as above described. The cam forming tool -is mounted on the tool support 9| andthe inclination of the follower guide 80 is adjusted i in accordance with theperipheral shape required for the finished cam. The tool is adjusted to its starting position at the surface of the blank.

, Crank 44 is then rotated causing simultaneous rotation' of the face plate I8 and longitudinal movement of the rack bar 51 which carries the follower guide 60. Follower 8|' is moved vertically by the guiding means.

In one method of producing cams, use is made i of a dividing head with change gears, but in such method .the lead cannot be so conveniently varied lby large or small differences, as. bythe means herein disclosed. In using the master cam method, any variation of lead or other important feature of the work, requires a new and different master cam, which because of the delay and expense involved in producing same, cannot be action of'the moving follower guide and transmits its` vertical movement through block 19 to 'rack bar |08. Rack bar |08 rotates gear |04 throughA gear |08 shaft |05 and clutch sleeve H0, produc-v Y ing longitudinal movement of rack bar |03, which is transmitted to support member 89 through block 91, screw 98 and nut 99. The cam forming tool is moved longitudinally along with sup- 1 port member 89.

When an axial cam is to be formed, the rack bar |08 is elevated to an inoperative position and locked therein as above described. Longitudinal movement of the follower guide 60 then produces vertical movement of the block 19, which is transmitted to the screw member H1. The vertical movement of screw member |1 is transmitted to the knee member 88 through the nut member ||8 and collar member IIB. The cam forming tool, is moved vertically along with the knee member 88. As in the case of the radial cam, the face plate I8 revolves simultaneously with the movement of the cam forming tool so that the shape of the cut made in the cylindrical .cam blank is determined by the shape and angle of adjustment of the follower guide 60.

The follower guide 60 may have any desired shape, determined by the path of motion which the intended cam follower for the nished cam must'assume.

An important feature of the present invention is the separation of the rotational and translational motions involved in forming the cam so that the shape thereof may be modied by moditying the translational motion. The translational l g motion involved in forming the cam is derived justified for other thanlarge quantities of identical production. In view of the above, cams are made; in many instances, by indirect and laborious methods, resulting in much hand work and non-uniformity of product. The machine herein .disclosed provides adirect and easily controlled method of performnig such work', and at a much lower requirement of skill and a much higher standard of quality.

The machine herein disclosed has various other possible uses. By mounting suitable tools in the tool carrier, the machine may be employed for such uses as-drilling to a pattern, milling, flame cutting proles, ilame hardening profiled surfaces, laying out lines, making angular-measurements, and the like.,

The profile defining member 80, as above mentioned, may have any desired shape, governed by the path of motion which the intended cam fol,

lower must assume and can be adjusted at various angles, depending upon the range of movement required for the intended cam follower.

While a specific embodiment of a cam generating machine for the forming of axial andradial cams has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore,

it is intended that no limitations be placed on the invention other than as defined by the scope of the appended claims:

'What is claimed is:

l. A surface generating machine comprising a support, a face plate rotatively mounted on said support, means for securing a cam blank to said face plate, a carriage on said support, ,means for adjusting said carriage horizontally on said support, means for securing a tool to said carriage, a. profile' defining member on said support, means for adjusting the angle of inclination of said profile defining member, means for simultaneously rotating said face plate and moving said profile defining' member longitudinally, a follower engaging the profiled surface of said profile defining member, a first vertically movable member engageable with the top surface of said follower, means for moving the carriage longitudinally responsive to vertical movement of said first member, a second vertically movable member engageable with the top surface of said follower, means for moving the carriage vertically responsive to vertical movement of said second' member, and individual means for elevating said vertically movable members independently with respect to said follower and said carriage.

2. In a profile-generating machine including a support mounting a rotatable face plate adapted to support a work piece thereon and a carriage movable on said support axially and varraeoa .u 4 .i :,r radially of said face plate 'and adapted to mount v -horizontal transverse axis to Ydefine a plurality a roule-forming tool thereomthe improvement l coxmprislng a, profile-defining member, means, `said support, said follower surface operatively mounting said member for reciprocablefmovelment on said support, means for simultaneously of profiles, a follower `vertically"reciprocable on engaging said follower so as to reciprocate said g, follower upon reciprocation of saidmember, a

rotating said face plate and reciprocatingfsaidj. member, said member including a follower/surface, said surface beingangularly adjustable to define a plurality ofproilles, a followerflinearly movable on` said support and operativelyienrack vertically slidable on said support and inend engageable with said fol, lower whereby said rack is vertically reciprocable with said' follower, a horizontal rack carried by cluding a lower ,1 0. said carriage, gear means carried by said carriage gaging said follower surface, and separate meansengageable with said follower and operativelyJ 3.- In a profile-generating machine including a t connectedv to said carriage for selectively'moving' v1-5 atively coupled together so as to reciprocate said.

horizontally upon reciprocationof said support mounting a rotatable faceplate adapted to support a work piece. thereonand acarriage movable on said support axially and radially of said face plate and adapted to mount a profileformingtool thereon, the improvement'comprissing a profile-defining membermeans,mounting said member for reciprocable movement onisaid support radially ofthe axis of saidface plate,'

means for simultaneously rotating said face plate and reciprocating said member, said member including a follower surface, said surface being angularly adjustable to define al plurality of profiles," a follower, means mountingsaid folylower onisaid support for reciprocal movement substantially at right angles to the movement o f saidmember, said follower surface operatively y engagingsaid follower lwhereby to reciprocate said-follower upon reciprocation of said member,

85 vertical screw vertically slidable on said support lower and operatively connected to saidicarria'ge f -and operatively engaging both racks-and clutch 1 means operatively associated with said gear ,means for selectively coupling and ,uncoupling said racks, whereby at times said racks are opercarriage follower. i `6.- In a. profile-generating lmachine including "a support, 'a mount for a work piece Ablank rotat able on said support on vertical axis, and a profile-forming tool carriage mounted on said support for movement-vertically and horizontally,

the limprovement comprising a lproiile-dening member, -means mounting said member on said support'k for horizontal reciprocating movement,

means for simultaneously rotating said mount and reciprocating said member, said memberinl` cluding an upwardly-directed follower surface,

`said surface being angularly adjustable on a horizontal transverse 'axis to define a plurality o f profiles, a follower vertically reciprocable on said support, said follower `surface operatively for selectively moving the 'latter axially and cating movement of saidfollower.

' 4. In aprole-generating 'machine including a radially of said. face plate responsive to reciproto support a work piece thereon and a carriage 40 support mounting a rotatable face plate adapted f movable on vsaid support axiallyv and radially of.`

said face plate andadapted'to mount avproleformingr toolthereon, the improvement comprisinga profile-denlngnmember, means mounting said member forreciprocable movement on said support radially of the axis of said faceplate,

g meansfor simultaneously rotatingsaid face plate and reciprocating said member, said member including a follower surface, said surface being angularly adjustable to define a plurality of profiles, Aa follower, means mounting said follower on said support for reciprocal movement substantially parallel tothe axis of -said face plate, said follower surface operatively engaging said follower whereby to reciprocate said follower upon reciprocation of said member, and

,engaging said follower. so as to reciprocate said follower upon 4reciproca'tion of said member, a

and including a lower end engageable with said carriage on said screw for vertical sliding movesaid collar and providing a seatfor said collar whereby said carriage is vertically reciprocable with said screw, a'nd means forelevating said screw relative to saidcarriage whereby to disengage said lower endI of said screw from said follower. o

'1.v -In a profile-generating machine-including a support, a mount fora work piece blank' rotatable on said-support on a vertical axis, and

a profile-forming tool carriage mounted on said movement, means for simulta eously rotating separate means engageable withsaid follower and operatively connected togsaid carriage for selectively moving the latter axially and radially of said face plate responsive to reciprocating moi/)ement of said follower.

5. In a prole-generating machine including a support, a mount ,for a work piece blank rotatable on said support ona vertical axis, and a prole-forming tool carriage mounted on said support for movement vertically and horizontally, the improvement comprising a profile-defining member, means mounting said member on said fine a plurality of profiles, a follower vertically support for movement vertically and horizontally, the improvement comprising a profile-defining member, means mounting said member on said support for vhorizontl reciprocating said mount andreciprocating said member, said memberN including an upwardly-directed follower surface, said surface being angularly adjustable on a horizontal transverse axis to dereciprocable on said support, said `follower surface operatively engaging said follower so as to reciprocate said follower upon reciprocation 'of said member, a rack vertically slidable on saidsupport and including a lower end engage- 7'0 ing both racks, clutch means operatively assoi- Y support for horizontal reciprocating movement,

means for simultaneously rotating said mount and reciprocating said member, said member including an upwardly-directed followersurface,

said surface being angularly adjustable on a able with, said follower whereby said rack is vertically` reciprocable with-said follower, a horizontal rack carried bysaid carriage, gear means carried by said carriage and operatively engagciated with said gear means for selectively coupling and uncoupling said racks, whereby at times said vracks are operatively coupled together so as toreciprocate said carriage-horizontally upon reciprocation of said follower, a

ment relative thereto,` a nut on said screw below' said follower vwhereby said screw isl vertically reciprocable with said follower, a collar mounting said carriage on said screw for verticalsliding movement relative thereto, a nut on said screw below said collar and providing a Aseat for said collar whereby said carriage is vertically reciprocable with said screw, and means for elevating v said screw relative to said carriage whereby to disengage said lower end of said screw from said follower.

8. In a profile-generating machine including a support, `a mount for a work piece rotatable on i said' support, and a tool' carriage movable on said support inplanes parallel to the axis of jsa'id mount and in planes normal to the axis of' said mount,` theimprovementcomprising a protile-defining guide, -means' mounting said guide on said support for reciprocating movement in,

a plane normal to the axis of said mount, said ,guide including a guide member pivoted thereon f vertical screw vertically slidable'on saidsupf A- Iport and including a` lower en'd engageable with l2 carriage, an angulariy-adlustable' Vproilling guide longitudinally reciprocable on said support, means said follower, means for moving the carriage in another direction responsive` tol movement oi saidl second member, and separate means for selectively securing one of said first and second members in an inoperative position out of engagement with said follower.

1i. A surface-generating machine, comprising a support, a face plate rotatably mounted on said support, means for. clamping a work piece to said face plate, a carriage on said support, a tool,

means for securing said tool to said carriage, an

v angularlyadjustable proiiling guide reciprocable for angular ,adjustment relative thereto/ a pair 1 of opposed arcuate extensions of said guides, 'means slidably connecting opposite portions of said guide memberito said extensions, a pair of clamps ior clamping such portions'to said extensions for locking said guide member in angularly-adjusted relation to said guide, and rack and pinion means' operatively associated with said guide member iorsimultaneously actuating both of said clamps.

9. A surface-generating machine, comprising a support. a face plate rotatably mounted on said support, means for clamping a work piece to said face plate, a carriage on said support, atool, means for securing said tool to said carriage, a proiillng follower guide reciprocable on said snpport, means for adjusting said guide for delining a plurality of proilles, means for simultaneouslyrotating said plate and reciprocating said follower guide, a follower engageable with said fguide and reciprocable thereby, A and settable means operatively associated with said follower for moving said carriage in axial and normal planes relative to the axis of said face plate in response to reciprocating movement of said iollower. t

10. A surface-generating machine, comprising a support,` a face plate rotatably mounted on said support, means for securing a work piece to said face plate, a carriage on said support, a forming f tool, means for securing said forming tool to said on said support, means rior simultaneously rotating -said face plate and reciprocating said guide, a single follower engaging said guide and reciprocated thereby, a pair of separate settable means engageable with said follower and reciprocated thereby and therewith, said means being operatively coupled to said carriage' for moving the same axially and radially relative to an axis parallel to the axis of said face plate in response to reciprocating movement of said guide and follower, means for varying the angular position of said guide, and .means for selectively inactivating one of said settable means.

GEORGE X. JOHNSTON.

REFERENCES CITED 'The following referenlces are of record in the Number Name Date 980,122 Pierson Dec. 27, 1910 1,689,370 Tessky Oct. 30, 1928 2,053,597 Bishop Sept. 8, 1936 2,321,789 Atherholt et al. June l5, 1943 2,366,993 Autos Jan. 9, 1945 2,386,973 Mietli Oct. '16, 1945 2,436,588 Martin Feb. 24, 19,48

, FOREIGN PATENTS NumberJ Country Date 365,905 l Great Sritain Jan. 28, 1932

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