US1667153A - Machine for producing irregular surfaces - Google Patents

Description

April 24, 1928.

B. HEYMANN MACHINE FOR PRODUCING IRREGULAR SURFACES 3 Sheets-Sheet 1 Filed Aug. 14. 1924 /n ven/or Bru/7o Heymann.

Afro/ways.

April 24, 1928.

B. HEYMANN MACHINE FOR PRODUCINGl IRREGULAR SURFACES Filed Aug. 14. 1924 s sheets-sheet v2 MACHINE FOR PRODUCING IRREGULAR SURFACES Filed A1122. 14. 1924 3 Sheets-Sheet 5 l /n venfor Bru/70 Heymann.

` meter.

Patented l sanno Hamann, or. rvaircsco, CALIFORNIA.

nenni: ron raonucme' emma.

v lappu'sun meaaujgait 14,-. im. serial no. 733,415. N

tableY and tool; the combination of boththese' I c This invention is4 p'artcularl 'adapted-to a machine for theproduction o conicoids or quadrics. of prescribed mathematical -formul `and which may be 'defined as: v A. jA' conicoid or 'quadric whichis Aan enl-l ,Y f velope formed by a family ofellipsoids of; revolution having variable parameters and a family of paraboloids of revolution.. having' variableparameters, all of these two groups- 10 of surfaces having one focus in common,

' while the free foci of the ellipsoidsof revo-fv lution have their locus on a straight line perpendicular to the princi al horizontal plane.v through he ellipsoid o the greatest para r:- Y x B. A conicoid or quadric which is an envelope first: of a family of ellipsoids ofrevolution having variable parameters and/sec# ond: of a family of hyperboloids of revolu' 29 tion having variable parameters, all of these` vtwo groups 4 of surfaces having' one focus in c ommon, while the free -fociof the ellipsoids of revolution have their locus on a straight 'line perpendicular to the principal hori zontal plane through thd Aellipsoid of the greatest parameter. O r.

. C. A'quadric or enveloper surface formed of ellipses of variable parameters in a series v of either horizontal parallel or horizontal diverging planes; and of either parabolic arcs` of variable parameters or hyperbolic arcs of variable parameters in a `vertical axial pencil of planes,..the said axis being Athe locus of one of the foci of all horizontal or diverging ellipses, while the locus of the `foci o 'parabolic and hyperbolic arcs 'is aI .fourtln degree curve, i. e. a limacon of Pascal.

My invention is also especially adapted for the production of punches and diesby which thin metal surfaces such .as reflectors may readily be formed and wherein the surface varies in accordance with a Aformula involvingvariables of thel second degree without being a surface of revolution and as particularly described above. l

. To produce such a surface,-internally or externally, I establish the necessary relative movement between fthe tool and the surface as generated; by causing the toolto move progressively in horizontal parallel or hori. 'zontal diverging elliptical paths of varying sizes while `causing the table with the material on which the tool is working to be moved i termittently upward or downward,

I '37 and, at the same time establishing a relative timed.

vertical and horizontal or" vertical and lat-V eral ,movements resulting in a anabolic'Y or vhyperbolic arc. These arcs are asedon the locrof first: all the vertices, or second: all the foci,`or third-z` all thercenters of all horizontalparallel or horizontal diverging ellipses described by the tool, and all these movements are automatic and relatively properly Bfy referring to the accompanying drawings my invention will be made clear.

Figure 1 shows a vertical longitudinal central section ofthe machine of. my invention adilpted to the production of punches.

. 1g. 2 shows a fwront View of the machine of Fig. 1. Y v A l Fig. 3 shows a vertical longitudinal central section of the machine'of my invention adapted 'to the production. of dies.

UNITED l9STATasLfr xfll'lloFFIca. "f

Fig. 4 shows a front v1ew of the machinel n of Fig. 3.

Fig. 5 shows a. lan v iew of the oscillati fr'ame 4and the e iptical cuttingl portions o the machine of Fi Y Fig. 6 shows a pl l grinding portions the machine of Fig. 3. l

-Fig'.'7 shows, in a larger scale, the nestof sliding cams arranged for the cutting or grinding of dies.

Fig. 8 shows a frnt view of the sliding cams o'Fig.'7.

Fig. v9 shows, in larger scale, the nest of sliding grindlng' of punches.

refer to identical parts.

Ref rring first to Figs. 1, 2, 3, 4, the pulley 1 isdaptedto transmit power from any,

1 'Iso v an view ofthe oscillat' "frame and elliptlcal di cams arranged for the cutting orl Throughout the figures similarnumerals movements ofthe oscillating frame, to the bevel pinion 4 and gear teeth 5 carried on the crank disk .6. This disk is adapted to ro tate in the movable carriage 7 slidable the 'tracks 8er- 8.

The sides 9 9, containing tracks 8 8 and trunions A 10-10, together withthe separator braces 11-11 form a. rigid frameoscillating about the trunnions 10-10 between machined'surfaces 12.-12 on the main frame 13-`-13.- The intermittent oscillating motion is imparted by worm 14 to se ent 15 on arm 16, which is attached to si es .9-v-9.

horizontaler lateral movement between 'the VBy means of a reversing-mechanism 68 to 71 a is possible 0 rtues'eaher Leiter; v wise or an anti-cloc ise movement of' the f' .oscillating frame or else have it set entirely y and 6. vThe tool 19is carried u 20 slidably-dapted to the di 'at rest which action will bedescribed below. The center about which .the-crank'disk 64 through the screw thread 24 actuated from the gear 25. Crank pin 23 is movable withinslide 26, which slide is connected to andv lerpendicular at all times with tracks 8--8.

he position of crank pin23l relative vto cenv .ter 18 of disk 6 determines the movement of the carriage 7 in tracks 8-8 and the ellipticallath 28 which the tool follows.

lgeeaipa A.

,' independently ive'n 'by motor 30. mounted on bracket 31 anden carriagle 7.` Thel grinding `and final polishing of 't 4"st lbstitutm'g abrasive wheels for the milling cutter.

'iff These abrasive wheels are preferably `actu ated 1 by a train of correctly proportioned sheaves 32 (see also Figs. 3, 4 and 6) driven Ifrommotor 30 through endless leather, rubber oriber cords.

V The before mentioned vertical movement is -impartedto the table 33 carried in the vertical-slides 34.-'-34 by the roller 35 which rides upon. a suitable c am surface,` more Vspecifically describedl below, thus causing the e gears 22 and 25 may be of any desired` ratio, 4or combination of gears, as may also be the pitch of screw threads 21 and 24.

The rotation of these screw threads is accom-V plished by the conventional star wheel trip mechanism. 27.

It will thus be seenfthat the operation/of the pulley 1 causesv the crankdisk 6 to rotate 1n the carriage 7 about the center 18 Vwhich latter has a horizontal movement the and causes the crank pin 23 to move simultaneusly in slide 26 perpendicular to that both rectilinear motions and the rotatingmotion of the disk the tool 19 will generate the ellipse 28. Thel size of this ellipse may a ratc et and worin, or'. worm gear, in -an case being suitably proportioned and time a vas a part of the drivlng means.

By vactuating the gears 22 and 25 and employing'any desired toothratios, the ellipses produced by the successive rotations. of the .disk 6 and the tool 19 may be decreased-or increased as vthe,V case may be. In othel vwords all such'ellipses will have their major.

allies in the same vertical longitudinal central ane. Y

The preliminary roughing out by the tool of the desired internal or external surface I prefer-to accomplish by the use of a milling I cutter shown at 19. lThis cutter is prefer-V ably actuated by a train of suitably selected the ratios of the gears 22 and V25 of the screw threads 21 and 24 as and vertical raising or lowering of the t-able. 33 and therefore of the block .of raw materlal *36.l It will be observed from Figs. 1 and v,2 that the blockY 36l/ieing in the formof a punchv or an external surface, is lowered gradually against the tension of the spring v`members 37e-37 andrunder the control ofthe roller and cams.

If it is'desiredA to produce a die or an iny terlial surface it is only necessary to place the roller 35 in the position 38 and reverse the spring members 37-37,'and otherwise operate the machine as before. The table 33 Will then be raised instead of lowered. tracks 8 8, relative to the oscillating frame,

which the roller 35 rides is e surface is accomplished by` v laying olf the ordinates of the parabolic or of center 18 so that through the resultant .of

Y stituted for the represent the locus of the center' of all el! lipses described by the tool 19), as successive radii from a base circle of 360 or less. Another way of producing a master cam is to base its generation onthe loci of either the vertices 40-40 or the foci 41-41 of all ellipses described by the tool 19.

In order to secure a smooth quadric surface cut by the tool 19, I prefer to divide the master cam into a plurality of independent cam surfaces 42 to 48 inclusive (see Fig. 1) which are brought into action successively, each then contributing successively a portion of the movement to the table 33. A single or master cam' may of course be subplurality of cams 42 to 48 here illustrated 1n which case table movement is actuated by al single cam surface, x'

but in such cases the resulting work is not as accurate as where the. movement is 'produced over-a greater range of cam movement than that of one revolution of the master cam. I therefore prefer a plurality of consecutively operating cam members, 4210 48,'

each moving successively through a large rotative range, thus securing in effect a greater degree of cam movement with respect to the 'table displacement. Thus, if the seven cams here shown be employed, each operating over al range of substantially 300 angular movement during-the period of its contact with 'will be substantially 2100 of angular move- 'ity of successivelyoperating, cams. During the movement Lof the cams the roller first rests upon the cam 48, all of the other cams being in their'highest possible position. As cam 48 rotates. through, say, its 300 of movement, the roller approaches-closer and closer to the highest spot on cam 47, which is still stationar When the radius on cam 48 under the ro ler exactly corresponds with the highest' spot -of cam 47, cam 48 rides clearof the rollerand a depression in its' surface permits the roller to now follow the slow yreceding 'of cam A47, whose movement likewise stops at the end ofits stroke and .when the roller just contacts with cam' 46,

cam 47 now likewise stops and the roller continues in its descending movement successively on the surfaces of ca'ms 46, 45, I44,;43 and 42 until it rides in its lowest possibde position, or if the movement of the table is desired tobe automatically fed upward instead of downward, a reversal of the above action takes place, the roller starting its upward travel on -the surface of cam 42, andA being successively picked up and carried higher by the surface 43, 44, 45, 46, 47 and 48. It is to be understood that the rollen 35 is carried on a spindle rigidly connected with the table 33.

The working range of each of the cams 43, 44, 45, 46 and 47 with respect to the master. cam is preferably 30 circular measurement but expanded over an angle of 300 on each individual disc, in other words, these cams must travel' at ten times as great an angular'velocit as vwould'the master cam. This plurality of Independent cams are provided with grooves and pins whereby adjacent cams are permitted a movement of approximately 300 before the next cam is picked up by the pin of its adjacent cam working in its own slot, exactly in the same Vmanner as the tumblers in a combination The cam 42 facilitating the initial abrupt vertical movement of the table covers a working range of only 8' circular measurement with respect to the master cam, but is expanded over 320 of movement of the shaft'49, in other words, this cain `must travel at four times as great an angular velocity as the cams 43, 44, 45, 46, and 47 or 40 times as fast' as the mastercam. This result is accomplished by the application of two pairs of gears 50,' 51, and '52, 53, each effective movement of cam 42. After an A angular movement of 300"` about the vaxis of 49, caml 43 with its'pin, which has been travelling in a groovem the adjacent cam 44, picks up this cam and :brings it into action. These grooves and pins' are similar to pins 86 and grooves 101 in Figs. 7, 8v and 9, except that theyfare in the form of arcs instead o f straight slots. ,After an angular movement of 300 of cam 44 its in in turn picks up the next cam 45 andbrlngs it into action. Thereafter cams-46, 47 and 48 are successively picked up by the pins of -the cam immediately beforeand they each are given the desiredv successive movement.

Thus lthe roller 35 riding on the surface of the successive cams transfer the appropriate vertical movement to the block of raw material 36. The manner in which the cams, are successively brought into action is best shown in Fig. 8, wherein the plurality of cams 72 to 79 inclusive are provided with a plurality of pins 86 pro'ecting from the flat. surface of the cam an engaging the adjacent cam in a slot or recess ofa length corresponding with the desired freedom of movement be- ,v

tween the cams (see Figs. 7, 8 and9). It will be readily understood that a similar construction wherein the slots are arcs about the axis 49 of the ca'm movement may be employed between the cams 42 to 48 of Figs. 1 and 2,`the pin of one cam riding inthe adjacent'arcuate slot in the adjacent cam,

`the said slot being of suicient length to :1l-

or` hyperbolic are have been considered.

The lhorizontal motions corresponding totheir absci'ssae must beprovidefl to 'obtain the ultimately desired curvatures of the surfaces specifie .This is accomplished by au intern'littent i lateral movementl of crank'pin 23 with re-l spect to the table 33, as illustrated in Fig. This movement originates with shaft 49 which actuates through bevel gears 60 and 61, thevertical shaft 62. Bevel gear 63- drives horizontal shaft 64 which carries a set of bevel gears at the end near the main frame 13v13. The vertical shafts 65 through. a groupI of bevel gears 66, finally operate the feed screws *A67-67 vvhich impart the lateral movement to slide 26 and finally to crank Apin 23. :The'vertical Shafts .65 are able' to compensate for any variations fin lengthand position duc to the operation of the oscillating frame by a conventionalsliding and swinging motion around the hori.

zontal shaft 64 and the 66 as centers.

In the production of an external surface group of bevel gears of a punch, as illustrated in Fig. 1, Whose..

the production of a punch or a die, whose horizontal, parallel' sectionsjare ellipses ofi'arying sizes and whose vertical axial sections are parabolic arcs of varlable param` veter it is necessary to lock the oscillating frame in a horizontal position.

These various operations of the osclllatmg lframe are'l controlled through aI reversing mechanism consisting of bevel gear `68 mounted on a sleevejointly with Worm .14, bevel gear 69, mounted loosely on shaft 62, bevel gear 7 0 turning freely-on a stud and'a jaw clutch 4member 71 slidably keyed to shaft 62. The sleeve with gear 68 and Worm 14 also turns freely on shaft 62.- When member 7l is locked With'gear 68 the Worm 14 will attain the same rotary motion las shaft 62, Whereas by locking member 71 with gea-r 69,- the Worm Will attain the opposite rotary motion as shaft 62 and by placing .member 71 in a neutral position, the worm 14 and with it the oscillating frame, will re main at rest. F

' In Figs. 3 and 4 is shown a modification for effecting the horizontal motion which .corresponds to the abscissae of the parabolic or hyperbolic arc and Vwhich motion is based on the loci ofv the vertices 40'-40, lor of the foci41--41 oron the locus of the centers 39, of all the ellipses'described by-the tool.

Instead of moving the crank pin 23 laterally,

as shown in Fig. l, I impart a horizontal -motion to the table 33.' The' horizontal movement of the carriage corresponding with the abscissae of the second degree curve which it isv desired to generate are produced through the rotation of the shaft 59 as a prime mover through' conventional `gears which actuate Vthe feed screw '100. (See Figs. 3 ,and 4).I A i further modification shown inFigs. 3, 4, 7, 8, and .9 is the substitution'r of anest of sliding cams for the vnest of revolving cams,` previouslyjdescribed, wherein .I-accomplish ther doubling` i A of the Working range ofthe cam', i. e., a 4 I.

'greater accuracy o r, accepting, the same accuracy ofthe revolving cams, a fewer num-v ffber of sliding cams. Another advantage lies in the, fact that `each sliding cam vis propelled individually by the driving shaft in stead of through a series of ins. l

.Referring particularly to.` ig. 7, the group of sliding. cams 7 2 to 80 inclusive is shown ready to ybegin the Work of milling, grinding or. polishing the internal surface .of a die. All. of the cams slide on a grill ofparallel' guide bars --85. Cams 73. to 8 0are proe yided with racks on their undersides which mesh, during the period of the effective movement of each cam, with pinions 83-83 on driving shaft 81. Cam 72 is designed to facilitate the abrupt vertical movement of the table at the beginning of the operation and has four times the linear speed of the other sliding cams being propelled independently by gear A82 simultaneously with the cam 73 which latter comes into action only at the end of the effective movement of cam 72. By means of conical pins 86 sliding in dove-tail grooves each cam is successively brought into action and propelled by its corresponding pinion as 83 throu h its success1ve range of movement- Ttationary bloclrsl 84'riding on the shaft 81 afford an effective support for the guide bars v85 under the Weight imposed by the rollersv35.

Fig. 9 illustrates the arrangementjofthe sliding cams for the milling, grinding or polishing of the external surface of a punch. The position of' thecams and driving shaft is the reversal of the one shown in Fig. 7. The Worm gear 87 iskeyed to shaft 81 and engaged by a Worm 88 on shaft 89, see Fig. 4. This shaft and worm are not affected by the reversal of the cams in changing over from cutting the die to cut-the punch.

ratios, etc., may be alteredl from timevto time to suit the requirements of any individual surface to bel produced. But it is'to 'be borne in mind that while the table 33 is lundergoing its respective movements that If desired, driving connections, gear.

the elliptic chuck is simultaneopsly ycausing the tool to describe -a series of horizontal parallel or horizontal divergingellipses of varying sizes, so that the surface of the Solid cut by thetool 19 will be one Whose longif tudinal'vertical central section will be either a parabolic or a hyperbolic arc and whose horizontal parallel or horizontal diverging sections will vbe ellipses of varying sizes; that is a conicoidal or quadric surface as above set forth. f

. Reference is herein made to my copending application No. 716,833, filed May 29th, 1924,

whereinlis .set forth further disclosure and ting operating said tool, a` chuck' and driving.

ldescriptive matter bearingupon this invenf tion. l.

1. Apparatus yfor generating quadricA surfaces. comprising a stationary frame, a cuttool and 'independent motor means for connectionsJ therefor compellin the movement of said tool, a carria sli ably mounted in said vframe and a apted to support raw material positioned before` said tool, means constructed and adapted to move said tool and other-means constructed and adapted to move saidimaterial relative gto said tool whereby the material is cut in a lui rality of complete horizontal ellipses tv ose major and minor axes are lprogreively changed on second degree curves.

2. Apparatus for generatin quadric surfaces comprising a stationary ame, a rotary cutting Vtool and independent motormeans for rotating said tool, a chuck 'and driving connections therefor compelling the move. ment of said tool in a selectedl elliptic path, a carriage slidably mounted in said frame and adapted to support raw material'positioned before said tool and .cam` devices adapted to move said carriage with respect to said frame and said tool.V

3. Apparatus for generating quadricjsur.-

faces comprising a stationary frame, a ro^` tary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compellin the movement ofsaid tool in a selectede iptic path, a carriage vslidably mountedin said frame and adapted to supportiraw material positioned before said tool and cam devices adapted to move said carriage with a vertical component, and other actuating colinections for simultaneously moving said carriage with a horizontal component.

4. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool 4and independent motor means for rotating said tool, a chuck and vdriving connections therefor compelling the said tool in a selected elliptic movement of path, a carriage slidably mounted inl said frame and adapted to support raw material positioned before said tool and cam devices adapted to move said carriage with a vertical component, and other actuating connections for simultaneously moving said` carriage with a horizontal component, said components corresponding. with the ordinates and absciss of a second degree curve.

V5. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool and independent motor means for rotating said tool, a chuck yand driving connections therefor compellingthe tool in a plurality of autodriving connections therefor compelling to movement of said`tool in a selected el i movement of said matically selected carri-age with '8. Apparatus for generating quadric sur- 'faces comprising a stationary frame, a rodriving connections t mechanism automatical y periodically and successively vary the amplitude of the sai'd'elliptic path..

6. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool and-independentr motor means for rotating said tool, a chuck and -driving connections therefor compellin the movement of said tool in a selected e iptic path, mechanisi'n adapted to periodically and successively vary the amplitude of the said elliptic path, a carriage slidably mounted in said frame and adapted to support raw'material positioned before said tool, and cam devices adapted to move said carriage with respect tolsaid frame and said tool.

7.l Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compellin the movement of said tool in aselected e iptic path, mechanism adapted to periodically and successively vary theI am litude of the said elliptic path, a carriage s idably mounted in said frame and adapted to support raw ma terial positioned beforesaid tool, and cam devices adapted to move-said carriage with a vertical vcomponent and other actuating connections yfor simultaneously moving said a horizontal component.

tary cutting tool and independent motor means for rotating said tool, a chuck and driving 'connections therefor compelling the movement'of said .tool in a selected elliptic path, mechanism adapted to periodically and successively vary to amplitude of the said elliptic path, a carriage slidably mounted in said frame and adapted to support raw material positioned before said tool, and cam devices adapted' to move said carriage with a vertical component and other actuating connections for simultaneously moving said i carriage with a horizontal component, said components being in.' accord Awith ythe ordinates andv abscissae ofV a second degree curve.

9. Apparatus for generating quadric surfaces comprising a` stationary frame, a rotarycutting tool and inde endent motor means for rotating said vtoo ,a chuck and Yerefor compelling the movement of said tool matically. selected complete elliptic paths of different dimensions, mechanism 4adapted to periodicallyand successively vary the ainplitude of the said elli tic paths and other varying theplane ofI the lsuccessive elliptic paths.

10. Apparatus for generating quadricsurfaces comprising vtary cutting -tooland independent motor lmeans for rotating said tool, a chuck and the ptic in a. plurality of autoav stationary frame, a ro iao ed in saidframe and adapted to support raw' I material positioned before said tool and cam devices adapted to move Isaid carriage( with respect to said' frame and said tool.

11. Apparatus for generating quadric surfaces comprising astationary frame, a'

rotary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compelling Ithe movement of said tool in a selected elliptic path, mechanism adapted to periodically and successively vary the amplitude of the said elliptic path, and other mechanism.

automatically varying the plane of the successive elliptic paths, a carriage slidably mounted in said frame and adapted to sup# port raw material. positioned before said tool and cam devices adapted to lmove said carriage With respect to said .frame and said tool with a vertical component and other actuating connections for simultane ously moving said carriage with a horizontal component.

12. Apparatus for generating quadric. .surfaces comprising a stationary frame, a

rotary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compellin the' movement of said tool in a selected el iptic path, mechanism adapted to' periodically and successively vary the amplitude of the said elliptic path, and other mechanism automatically varying the plane of the successive elliptic paths, a carriage slidably mounted in saidframe 'and adapted to sup'- port raw material positioned before -said tool and cam devices adapted to move said vcarriage with respect to said frame and said tool with a vertical component and other actuating connections for simultaneously moving said carriage with a horizontal component, said components corresponding with the ordinates and abscissae of a' second degree curve.

13. Apparatus for generating quadric surfaces comprising a stationary frame, a

lrotary cutting' tool and independent motor means for rotating said tool, a chuck and driving connections therefor com elling the movement of said tool in a plurallty of` automatically selected complete elliptic pathsof different dimensions,

periodically and successively vary the amplitude ofthe said elliptic paths and otherl mechanism automatically varying the plane' of the successive elliptic paths and comprising tracks carrying said chuck, said tool 'and tool rotating parts being on a pivoted axisl carried on\said frame and in the planeof the tools rotation.

the amplitude of the-A mechanism adapted to 14. Apparatus for generating quadric surfaces comprising a. stationary' frame, a rotary cutting tool and independent motor means .for rotating said tool, a chuck and driving connections therefor compellin the movement 'of said tool in a selected el ipticl path, mechanism adapted to periodically and successively var the amplitude of the said elliptic path an other. mechanism auto.- matically varyin' the plane of the successive' elllptic'pat s and comprising Atracks carrying said chuck, said tool and tool rotat` ing parts being on said frame and in ythe, plane of the toolsl rotationaV carriage mounted in said frame and adapted to u port raw material positioned before sai p tool vand-cam devices adapted to move said carriage with respect to said Aframe and said tool.

y 15. Apparatus for generating quadric surfaces comprising a 'stationary' frame, a rotary cutting tool and independent motor means for rotating said tool, a chuck' and driving connections therefor compelling the movement of-said tool in aselected elliptic on a pivoted axis 4,carried i ands'uccessively fvar the amplitude of the said elliptic path an other mechanism automatically varying the plane of the successive elliptic paths and comprising tracks carrying said chuck, said) tool tating parts being on a pivoted axiscarried on said frame and in the plane of'the tools rotation, a carriage mounted in sa'id frame and adapted to .support'raw material p0sitioned before said tool and cam devices adapted to move said carriage withl respect to said frame and said tool with a vertical component and other actuating connections for simultaneously lmoving said carriage witha horizontal component.

16. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool and independent motor means for rotating saidl tool, a chuck and driving connections therefor compellin the movement of said tooly in a selected el iptic path, mechanism adapted to'. periodically and sucjcessively vary the amplitude of the' said elliptic path and other mechanism automatically varyin thel lane of the successive elliptic .pat s and? comprising tracks and ,w01 im.F

lim

niet

carryingsaid chuck, said` tool and tool rocomponent and other actuating connections for simultaneously with a. horizontal nents correspondin absc of asecon moving said fcarriage with -the ordinates and. 'degree curve.v

component, said compo- 17. Apparatus for generating quadric surfaces comprlsing a stationary frame', a rotary cutting tool and independent motor means for rotating'y said tool, a chuck and contributing a. vertical component of moyement to said carriage.

18. Apparatus for generating quadric sur faces comprising a stationary frame, a ro tary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compelling the movement of said tool in a selected elliptic path, a carriage slidably mounted in said 'rame and adapted' to support raw material positioned before said tool and cani devices adapted to move said carriage with respect to said frame and said tool comprising a plurality contributing a vertical component of movement to said carriage and other devices and connections simultaneously moving said'carriage with a horizontal component.

19. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compelling the movement of said tool in a selected elliptic path, a carriage slidably mounted in said frame and adapted tosupport raw material positioned before said tool and cam devicesl adapted to move said carriage with respect to said framel and said tool comprising a plurality of successively engaged cams each contributing a vertical component of movement to said carriage and other devices and connections simultaneously moving said carriage with a horizontal component, said component being in accord with the ordinates and abscissae of a second degree curve.

20. Apparatus as set forth in claim 4 and driving means carried'on said frame and adapted to drive said driving connections, actuating connections and said cam devices and said carriage. f

21. Apparatusas set forth in claim 8 and driving means carried on said frame and adapted to drive said driving connections, actuating connections and said cam devices and said carriage.

22. Apparatus as set forth in claim 16 and fdriving means carried on said frame and adapted to drive said driving connections, said carriage, said actuating connections, said cam devices, said mechanism and said other mechanism.

v 23. Apparatus for generating quadric surof successively engaged cams each,

'rAV

. n faces comprising a stationary frame,.a rotary lcutting tool and independent' motor means for rotating said tool, a 'chuck and driving connections there-for compelling the movelnent of said tool in aselected lelliptic path, mechanism adapted .to periodically and successively vary the amplitu'decof the said elliptic path, a carriage slidably mounted in said frame and adapted to support raw material positioned before said tool, and timed means shifting said 'chuck in accord with the abscissae of a second degree curve.

24. Apparatus as set forth in claim 23 and cam devices adapted to move said carriage with respect to said frame and said tool in accord Withthe ordinates of a second degree/ curve. y

25. Apparatus as set forth in claim 23 and cam devices adapted to move said carriage 'faces comprising a statipnary frame, a rotary cutting tool and lndependent motor means forrotating said tool, a chuck and driving connections therefor compelling the movement of said tool in a selected elliptic path, mechanism adapted to periodicallyT and successively vary the amplitude of the said elliptic path, and other mechanism automatically varying the plane of the successive elliptic paths, a carriage slidably mounted insaid frame and adapted to support raw material positioned before said tool, and cam and screw devices adapted to move said carriage with respect to said frame and said tool and* other mechanism automatically var ing the plane of the successive elliptic at s. C p 27. Apparatus for generating quadrio surfaces comprising a stationary frame, a rotary cutting tool and independent motor means for rotating said tool, a chuck and driving connections therefor compelling the movement of said tool in a selectedl elliptic path, mechanism adapted to periodically and successively vary the amplitude of Athe said elliptic path and other mechanism automatically varying the planeof the successive elliptic paths and comprising tracks carry ing said chuck, said tool and tool rotating parts being on a pivoted axis carried on said frame, and in the plane of the-tools rotation..V j

" 28. Apparatus for generating quadric surfaces comprising a stationary frame, a rotary cutting tool Aand independent motor means for rotating said tool, a chuck and driving connections therefor compelling the movement of said tool in a selected elliptic path, mechanism adapted to periodically and Asuccessively vary the/amplitude of the said elliptic path and other mechanism automatically varying the plane of the successive el- 'vliptic paths and comprisingv tracks carrying said chuck, said tool and tool rotating parts i axis carried on said frame and inthe plane of the tools rotation, a carriage mounted' in said frame and adapted to ysupport raw material 'positioned before said tool and cam and screw devices l parabolic adapted to move said carriage 'With` respect vto said frame and said tool.'

' 29. In apparatus for generating an inter# inal quadric surface, av tool and mechanism nal quadric surface, a tool andmechanism' constructed andadapted to move said tool in a single plane and in adjustable elliptical paths, a table adapted toV receive raW material on which the tool lis adapted to Work, and means causing the table vmovement in a ath -at right anglesr to the plane ipses and operating devices to of said el a table adapted to receive raw maf -carry raw material and means drive the tool controlling mechanism and thc means causing re1at1on.

f .31. A .machine fdr producing internal quadric surfaceslcomprising la cutting tool and" mechanism constructed and adapted to move said tool to generate concentric ellipses, a template, a table movable against said template and' having mechanism causing another movement at right angles' with respect to said templateJ the combination of said movements is a parabolic path with respect to any lfixed point in the said machlne. f 32. A machine for producing internal quadric surfaces comprising an adjustable cutting device constructed and. adapted to produce horizontal internal cuts in elliptical paths of varying size'and a table adapted to giving said table an upward motionand a horizontal movement, whereby the tablevmovement .in timed` motion on a parabolic path in timed relav tion` to the adjustment of the cutting device' which path is thel locus otthe foci of the varying ellipses generated by the tool.

BRUNO HEYMANNQ

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