US1770458A - Engraving mechanism - Google Patents

Description

y 15, 1930- s. CASTCNGUAY ,770,458

ENGRAVING MECHANISM Filed Jan. 21, 1926 5 Sheets-Sheet l [22 vezzzor a 24% @M S, C'astongzzay July 15, 1930. s CASTQNGUAY 1,770,458

ENGRAVING MECHANISM Filed Jan. 21. 1926 5 Sheets-Sheet 2 01991 8. Cat $02291! y izgvezztar Atfoz-zzey y' 0- SCASTONGUAY ENGRAVING MECHANISM 5 Sheets-Sheet Filed Jan. 21. 1926 5. Castor: ac;

' Attorneys.

y 15, 1930- L. s. cAsToNGuAY 1,770,458

ENGRAVI NG MBCHAN I S Filed Jan. 21, 1926 5 Sheets-Sheet 4 e -S. j z [22 MW .Ze nguay.

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July 15, 1930. L. s. CASTONGUAY ENGRAVING MECHANISM Filed Jan. 21, 1926 5 Sheets-Sheet 5 m k x $.Caston an I Invent- 2- y I I I r Patented July 1 5, 1930 .Ti EGE-Its. CASTONGUAY, OF AKRON,

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work support 23 'rotata'bly mounted on the i lisrrixrr ES mar Em {nineties OHIO, nssienon ny MEsN-E :ASSIGNMEN'JifijIO i-HADLEY F. FREEMAN, 01 LAKEWOOD, OH IO ,ENGRAVING ME'cHA'NIsM Application filed January '21,?1926. "tSeri'al iJNo. 82,661.

"My invention relates to engraving mechanism particularlythe type employed for cutting 't-he'design in tiremolds and the principal object of my invention is to'provide a new and improved mechanism of this type. In the drawingsaccompanying-this specification and 'forminga part of this application I have shown, for purposes of illustration one form which my invention may assume. In thesedrawings: 7

Figure 1 is 'afrontelevation of-thlsillustrative embodiment of my invention,

Figure 2 is a view taken from the side in Figure 1, 1 I 1 1 Figure 8 1s a plan view omltting the cutter heads and the supports therefor to moreciearly show the work supports and the actuating and controlandspacing mechanisms,

Figure {is asec'tion through the pattern mechanism taken on the'line 4c4 of Figure 3,

Figure '5 "is a section at right angles tothat of F1gure4ltaken on theo'llne 5-5 of Figcomprises a plurality of units A arranged side byside preferably upon a common sub- ,Each .of the. units forward end with a table 22 surmounted by an intermediate member 140 rotatably mounted on the table 22 by means of an annular boss 141 provided'on'the lower faceofthe intermediate member 140 and extending into i and riding in an annular groove 25in the upper face of'the table :22, while the intermedi-' ate member l l0 is'in turn surmounted by a A comprises "a base section 21 elongated transversely of the axis connecting the units A and provided at 'lllS.

intermediate member M0 ibyrmeanssof an-z-annulari-boss .124; provided .on the lower .face 'of the avork; support 23 and extending: into a and riding in ianiannular groove 11 42511 the i upper face of'ithe intermediatemember 140. Y

JAtItheirear each: basesection 21 zissprovided with a "radially extending guideway 26 on which :is reoiprocably :mounted e a bracket: 27

re'oiprocablei onst-he base section 2lrby 'means 0f ar-screwi-28 rotatablerin the base sectionfil andengagingianut element (mot shown) iintegria l w ith the bracket Q'Zzto thus advance and retract the bracket; 27 iupon .rotation of the screw:28;- while positioned on: the inner faeeiof th'e bracket 27 1s a vertical guideway 30 oniwhichiis mounted-a support 311'eciprocable along the guideway -30 "by means :of a screw 32 retatably mounted in the: bracket-:27 "and engagingianut element (not shown) integral with the 'support 31 to thus raise and lower the suport 3l-ealong the guideways 30 upon rotation of the screw 32.

*dlx tending'inwardly from the base8 l 'ofthe support BLare a pair ofspacediplates 35 and 36 havin-gsecured thereto by mean's ofmadhi-ne screws 37 a pair of cleats-B8 carrying tru'nnions 39, effective to pivotally support fromand-between 'theipl iltesf 35 and 36 a cut tei -head ltl-*comprising a tubular; easing 41 provided with' recesses 2&2 for receiyin'g thetrunnions 39 and cai'rying reciproeably within its bore a sleeve 43 which'in turn'acts as;

abeai'i-ng' forga shaift 44: carrying at-its lower enda cutter element45 rota ted from an? electric motor-"lo-by means of a {beltJ transmit ting-Eth'e' rotation of the motor 46-from the moto'r pulley ldto a pulley 49 carried by a shaft 50 carryingat'its inneifiend a bevel-gear the reduced extension 53- "of the shaft '44 the reduced extension 53 of theshaftl beingv guided iira bearing" 54 carried by a bracket 55" extendingzfrom the -upper"end ofthe tnbu- V la'r :'c asi-ng 'tfand' also mm rising; a sleeve 56 efiec'tive to support the shaftfi'O carrying the piilleY l-S' and the bevel gear 51.

Inafdesigniwherein each element le rtends tothecentei" line 'of'fthe mold ituwoiildbe, possible to' maintain the cutter 45. advanced "at all times andtdmakethe'entire cut by milling with the peripheral face of the cutter 45, but with a design 1n which every element does not extend to the center line of the mold it is essential that the initial cut in each such element be made by the cutter 45 by a drilling action as the cutter 45 moves to its advancediposition from a reviously retracted position. As a matter fact it is also con venient to utilize this same action in cutting tdesiflnwhere every elementdoesextend to the center line of the mold.

In order to permit this advance of the cutter 45 I mount the sleeve 43 for reciprocation within the tubular casing 41 andcelon ate "he spline on the extension 53 of the sha 44 the extension 53 mayslide within the lmveltgear 52 and the .entire shaft 44 and sleeve43 may slide within the tubular casing fl and in addition,.I provide means for aci :omplishing thisreci rocation of the shaft 44 andthe sleeve 43, t is means being herein shown asanarm 57 ivotall mounted at 58 on abracket 59 carried by t e upper end of the tubular casin 41, restrained in its movenentm wardly y means of a set screw 60 adgiusta ly mounted in a lug 61 carried by a lever 62 extending from the bracket 59, movable upwardly against the set screw 60 by. means of an air cylinder. 63 extending bew tween the armo57 .end a bracket 64 extending the lower endof the tubular casing 41,

based downwardly away from the set screw 60L v means of a tension spring 189 also exten between the arm 57 and the bracket transmitting this movement to the slaere 43 means of an integral sector 65 extending t rough an, aperture 66 in the tubu-. larrasin .41 into mesh with-a rack67 carried iaoent surfaceof the sleeve 43. in" -t.0Bm8ti0D. ,Of the cutter head on the 39, and advancement of the tool laterally into the work, is imparted to the utter. headm by m a s of a sector 68 secmglztmthei upper end of the casing 41 ado iaoentthe junction of the bracket 55 and o eratedhy a ear 69 carried by a shaft 70 mmlmod in a eating 71 in the plate 35 and is n; turn operated, by means of a gear 143 upon a shaft 144 rotatable in a bearwi infiiltt also formed in the plate 35.

g 1 order to maintain, during the swinging; of thecutter head 40, the drivm connection between, the, motor pulley 48 an the driven 'pullemficparried by the shaft mounted Mt Tn-thebracket on the cutter head 40, the ismounted upon an arm 78 pivoted to} bracket 79 rising from the su port 31 mndthe motor 46is connected to tli head 40 by means of a strut 80 pivotally conw to the motor 46 concentrically with the shaft 81 of the motor pulley 48 and to the cutter head 40 concentrically with the shaft 50 of the pulley 49 and accordingly efiective to swing the motor supporting arm on its pivot on the bracket 79 to maine cutter tain the centers of the motor ulley 48 and driven pulley 49 at all times a Exed and constant distance apart, and to thus preserve the operating connection between the motor 46 and the cutter head 40 regardless of the oscillation of the cutter head 40. a

The screws 28 are all operated in unison from a hand wheel 146 mounted on a shaft 147 supported on the rear ends of the several base sections 21, connected to the screws 28 by a succession of bevel gears 148 each meshing with a cooperatin bevel gear 149 on one of the screws 28, and t erefore effective to advance and retract all of the brackets 27 in unison upon operation of the single hand wheel 146; the screws 32 are all operated in unisonfrom ahand wheel 150 mounted on a shaft 151 supported by the brackets 27 of the several units A connected to the screws 32 by a succession of worms 152 each meshing with a cooperating worm gear 153 on one of the screws 32, and therefore efiective to raise and lower all of the supports 31 in unison upon operation of the single hand wheel 150; the air cylinders 63 are all operated in unison by connection to a single supply line controlled by a single valve (not shown); the cutter heads 40 are all coordinated to oscillate in unison by means of connections 188 extending between the shafts 144 of the various units A and are operated in unison by meansof a single actuating lever 154 secured to the shaft 144 of the left hand unit A, and,

if we may assume for the present that each work support 23 rotates as a unit with the corresponding intermediate member 140, the

intermediate members 140 and work supports 23 are coordinated to operate in unlson by means of a reciprocating member 155 c0nnected to arms 156 extending rearwardly from the intermediate members 140, and are 0 erated in unison'by means of a lever 157 pivoted atvl58 to a projection 159 extending fromxa pedestal. 99 rising from the base 21 of the left hand unit A and also carrying a slide 101 reciprocable in guideways 100 formed in the pedestal 99, connected to the lever 157 by means of a link 160, and connected by means of a lever 161 to the point of pivotal connection of the reciprocating member 155 and the arm 156 of the left hand unit A. y I

From the above description it will obvious tothose skilled in the art that operation of the actuating lever 154 will rotate the shafts 144 of the various units A to oscillate the cutter heads 40 of all of the units A in unison, and, still assuming that each work support 23 operates as a unit with the corresponding intermediate member 140, that operation of the actuating lever 157 will act through the reciprocating member 155 to oscillate in unison all of the intermediate members 140 and work supports 23.

Under these circumstances it is of course '15 and work supports 23 by the actuating levers 154: and 1575 this coordination-beingeifected herein by providing on the shaft 70 of the left handunit A a second gear 162 meshing with a segment 163 carried by a lever-164 pivoted at v 165 to the supporting plate and connected by means of a link 166 to a slide 109 reciprocably supported in guideways 108 in the pedestal 99 andcarrying a pin 118 extending downwardly into the cavity 119 in a pattern plate120 secured to the slide 101 -by means of set screws 122 and havingits cavity 119' of that contour which in coordination with the pin 118 will restrict the movements of the actuating levers '154and157, and of the work supports 23'and cutter heads 10, to within the limits of the design desired to be cut by each of the cutting unitsA; Y It will be understood that with such an arrangementthe c'utting devices areoperated until the cutting tools have cut cut-the entire substance within the limits of the'desired design, that the control herein shown is not automatic in the sense that 'it'itself causes the oscillations of the work supports 23 and cutter heads-4L0 necessary to cut the desired designpbut on the contrary that the control herein shown merely limits the cutting to thelimits of the desired design and leaves the oscillation of the work supports'23 cutter heads eiO to be effected bythe operator within these limits by operation of the actuating levers 154 and 157.

In the above discussion of the' operationof the device eachwork support'23 has been zi-ssumedto operate as a unit Withthecorresponding' intermediate member 1&0 and were each ofthe cutting units A to be called upon to cut the design but a single time such a construction would be entirely satisfactory. In 1 engraving a-tire'mold, however, it is necessary to repeat-the design many times about the peripheryof the mold and accordingly a machine for that use must be so constructed that each work support 23 does .move exactly L ith thecorrespondingintermediate member 140 during the cutting of anyone design to accurately transmitto each work support the actuations of the pattern plate carrying slide'lDl, yet ismovable relative'to the cor-- responding intermediate member 140 to space v rious units A, by securing the shaft 171 and rack 168 against relative reciprocatory movement whereby, 1n the absence or'rotation of the sham 171, the rack 168 and shaftl? 1 force the intermediate members 1 10 and work supports23 to-rotate in unison and, upon rotationof'the shaft 171, the worms17O are effectiveto advance the work supports 23 relative to the intermediate members 140 to secure the desired spacing of the Work supports 23 into position for repetition of the design.

in the embodiment ofmy invention herein shown I secure this coordination between the rack 168 and the shaft 171 by securing both to a base 172 reciprocable in a pedestal 173 carried by the base section 21 of-the left hand unit A, the shaft l'ilbein rotatably and non reciprocably mounted in a bearing 17 1 caricd by the base 172 and the rack 168' being secured directly'to the base 172 by a pair of machine screws V175 and I provide for the desired rotation of the shaft 171 by means ofa dividing head consisting of an arm 132 p'iv-. otedupon an extension 176 of the base 172, provided with a handle133 comprising a stop pin 134 arranged to seat within an aperture 135 in the extension 176 to hold the arm 132 against rotatiom-and provided also with a a gear 136 formed integral with the arm 132 and connected through an intermediate gear 131 to a'gear 138 carried by the shaft 171,'the

intermediate ear 137 bein em 10 ed to erh t: p y P ous that nnd'er normal coneitions the shaft 171 'is locked against rotation "by the presence of the pin 13a in the recess'135and that under this condition the worms 170 become 1 in effect a rack meshing with the worm wheels 169 and effective, an cooperat on with the rack 168 'meshing with the sectors 16?,to force ea h work support 23 to rotate in unison with the corresponding intermediate member 1 10, thatthis result' is achieved with- 2 out interfering with the oscillation of the work supports23 by the actuatinglever 15711 interconnecting the rack and shaft 1'31 To those'skilled inthe art itwill be obvi-- throu h the base 172 itself slidably mounted,

Worms 170, acting from the base 172 as fixed by the engagement of the racks 168 with the intermediate members 140, act through the V worm gears 169 to rotate each work support 23firelative to the corresponding intermediate member'glritl to thus space each Work support 23 for the repetition of the design and by an amount determined by the change gears 137 and 138 and therefore widely variable to widely vary the number of times the design is repeated in the mold.

Inlhe above discussion of the device it has been assumed that the cutter 45 retained the same reciprocatory position throughout the entire cuttin operation. In many cases the design is lai out on an arc and it is entirely ossible for the cutter to act in this manner. other cases, however, and particularly in en aving designs extending down over the si o wall of the tire, it becomes desirable to automatically vary the reciprocatory position of the cutter 45 to avoid the inconvenience and expense resulting in following the practice new general in the art of dividing each such design into two or more parts each of which may be engraved without change in reciproeatory position of the cutter.

In the embodiment of my invention herein shown I disclose means for automatically accomplishing this change in reoiprocatory movement of the cutter 45 by providing for I variation in position of the set screw 60 by pivoting the carrying arm 62 to the supportbracket 59 at 177, prolongating this supporting arm 62 beyond the pivot point 17 7, andproviding on t is prolon ation 17 8 a follower pin 179 arranged to ri e in the groove 1.80 of an arcuate cam 181 fixed to the side late 36 and effective through the pin 179 and ever 62 to vary the position of the stop screw 60, and therefore of the arm 57 and sleeve 43 and cutter 45, to at all times maintain the cut- 45 at that reoiprocatory position corresponding to and determined by the contour of the cam groove 180 at that point corresponding to the then oscillatory position of the cutter head 40 upon the supporting plates and 36.

From the above description it will be obvione to those skilled in the art that by properlfioming the cam groove 180 I may provide any desired reciprocatory movement of the cutter 45 as the cutter head oscillates, to time rovide anydesired cross-sectional contour or the base of the cut, and particularly that Imay form the side wall design simulianeously with the operation of forming the tread design, and. also that I may form a tread design in which the base of the cut is ofiyier than arcuate.

It will of course be obvious that Imay re- .1 was ciprocate all of the cutters in unison by providing like cams 181 on all of the cutter heads 40.

And it willalso be obvious that I may operate as many units as desired and not merely two as shown herein.

0n the other hand, those skilled in the art will reanze that the molds to be engraved vary slightly in thickness even when supposed to be identical, and that a certain amount of adjustment is required in each unit A to care for this variation. Inasmuch as the supports 31 are all raised and lowered in unison I find it convenient to provide this individual adjustment in the manner herein shown, by forming each work support 23 in the form of alower section 182 carrying the annular boss 24 and the worm gear 169, and an upper section 183 directly supporting the work and screw-threaded to the lower section 182 to effect the desired adjustment by rotation relative to the lower section 182 and then be locked in adjusted position by suitable securing means (not shown).

I may also form in the lower section 182 an annular. T-slot 184 arranged to receive the heads 185 of bolts 186 freely slidable for spacing until tightened by rotation of the handied nuts 187 to lock the work support 23 to the intermediate member 140 independently of the rack 168 and shaft 171.

From the above description it will be obvious to those skilled in the art that I have provided engraving mechanism of the t pe suitable for engraving tire molds forme to engrave in a single operation a design of a contour other than arcuate, and operable to adjust all of the brackets 27 in unison and all of the supports 31 in unison, to adjust the work tables 23 individually, to actuate all of the work tables 23 in unison and all of the cutter heads 40 in unison, and to reciprocate all of the cutters 45 in unison, to thus en rave a plurality of molds in unison by a sing e operator from a single control and operating apparatus. Under these circumstances it will be obvious to those skilled in the art that I have provided engraving mechanism possessing advantages not possessed by any engraving mechanism heretofore known.

At the same time it will be obvious to those skilled in the art that the particular embodiment of my invention herein shown and described may be variously changed and modified without sacrificing the advantages of my invention or departing from the scope thereof. It will therefore be understood that the disclosure herein is illustrative only and that my invention isnot limited thereto.

I claim: a

1. Engraving means comprising a plurality of units each com rising a rotary work support, ran-intermediate member mounted concentrically with said work support, a cutter, and means supporting said cutter and said work support for rotation of said work support'and for additional relative-movement of said cutter and saidjwork support effective to produce, with suchwrotationof said work support, relative movement of said cutter and said work support two-dimensional along the surface beingengraved; common actuatlng,

means for effecting-such movement-in allof said units in 'unison, comprising reciprocate ing means engaging said intermediate members for effecting such work support rotation in all said units-1n un son; and common spacing means interposed between each of said ter and said work support for rotation of said work support and for additional relative movement of said cutter and said work support effective to produce, with such rotation of said work support, relative movement of said cutter and-said work support two-dimensional along the surface being engraved;

common actuating means for effectingsuch movement in all of said units in unison, comprising reciprocating means engaging said intermediate members for effecting such work support rotation-in all said units in;

unison, and common spacing means, comprisingin each unit a wormmounted-to move with said intermediate member and meshing with the corresponding worm gear,.efl'ective to produce periodically, in all of said units-in unison, additional such rotation of said work supports, to thus periodically space said work supports in unison for the presentation of successive areas for engraving.

3. Engraving mechanism comprising a pair of units disposed horizontally spaced from each other and alined and each comprising a work support movable in one divmension along thesurface being engraved and a cutter mechanism movable in another dimension along the surface bemgengraved, to thus provide relative movement between said cutter and said work support two-die mensional along the surface being engraved;

a first common actuating means-for effecting such work support movement 1n allof-said units in unison; and a second common actuating means for effecting suchcutter mechanism movement-in all of-said units in unison. 4-. Engraving mechanism comprising a pair of units disposed horizontally spaced from each other and alined and each compris- 'ing a work support movable in,onecd 1mens1on alongthe surface being engraved-and a cutter mechanism movable in another dimension along the surface being engraved, to thus pro vide relative movement between; said cutter and said: work-support two-dimensional. along thesu-rfacebeing engraved :a first common actuating means for effecting such work support movement in allof said units in unison, comprisinga coordinating means connested-to each worksupport; and a second actuating means for effecting such cutter mechanism movement in all of said units in unison.

5 Engraving mechanism comprising a pair of units disposed horizontally spaced from each other and alined and each comprisinga rotary, work-support and a cutter mechanism movable transversely to produce relative movementbetween said cutter mechanism and said work support two-dimene sionalalong the surface being engraved; a first commonactuating means for efiecting such work support actuationin all of said units in unison, comprising reciprocating means-operatively connected to each of said work-supports and'effective to rotate all of saidwork supportsin unisonupon reciprocation of saidreciprocating means; and asecond common actuating means for effecting such cutter. mechanism movement in all of saidunits inunison, r,

6. Engraving mechanism comprising apair ofunits disposed horizontally spaced" from eaclr'otherand alined and each "come prising a? work supports-movable in onei dimension along the. surface being engraved; anda cutter mechanism movable in another dimension along-the surface being engraved, to thus provide relative movementzbetween said cutter and" said Worksupport twodimensional along the surface being ,en-. graved; a first, common actuating means-for efiecting such work support movement in all-of saideunitsinsunison comprising a cooperating means connected to each :work

support and by connections comprising spacing means. for periodically effecting additional such movement of said-worksupports for the 1: resentation,}in all of said units in unison, of successive areas for engraving; 3 and a secondcommon-actuating means for effecting such cutter mechanism movement in allof said units in unison. 7. Engraving mechanism, comprising a pair of units disposed horizontally spaced 3 from each other and alined and each com prisingr a rotary work support and a cutter mechanism movable, transversely to produce relative movement between said cutter mechanism and said: worksupport two-dimen- 5 sionahalong the surface being engraved; a

first common actuating-means for effecting such work support actuationin all of said units, 1n .un1son, comprising reciprocating 1 means operativelygconnected; to each of said work supports and efiective to rotate all of said work so ports in unison upon reciprocation of saifreciprocatin means; a second common actuating means or eflecting such cutter mechanism movement in all of said units in unison; and common spacing means interposed between said reciprocating means and each work support effective to periodiproduce additional rotation of all of so wvork supports in unison to thus periodically-space all of said work supports in unison for the presentation of successive areas for engraving. 8."Engraving mechanism comprising a r of units disposed horizontally spaced rom each other and alined and each comrising at work support movable in one dimension along the surface being engraved and 'a cutter mechanism movable in another dimension along the surface being engraved, to thus provide relative movement between said cutter and said work support twodimensional along the surface being engraved; a first common actuating means for efleeting such work support movement in allof said units in unison; and a second comitetuating means for efiecting such cutte'r-fliechanism movement in all of said units in unison. comprisi'n a coordinating means coilne cted to eachsaid cutter mechanism.

-. 9. Engraving mechanism comprising a ir ofuuits disposed horizontally spaced each other and alined and each compfiiing a rotary work support and a cutter uflttfl'mnism movable transversely to produce relative movement between said cutter mechaiiism and said work support two-dimensioual along the surface being engraved; a fii'st common actuating means for efi'ectin sueh 'work support'actuation in all of sai unifi in unison; and a second common actuating means for effecting such cutter mechanism movement in all of said units in unisou, comprising coordinating means connested to each of said cutter mechanisms and efigctiveto move all of said cutter mechanismsin unison upon movement of said coordiuating means.

11). "Engraving mechanism comprising a pairfof units disposed horizontally spaced rom each other side by side and alined and each comprising a rotary work support and a cutter mechanism movable transversely to produce relative movement between said outter mechanism and said work support twodimensional along the surface being engraved; a first common actuating means for eflecting such work support actuation in all ofsaid units in unison; and a fiecond common actuating means for efiectiii such cutter Mechanism movement in all 0 said'units nrflunibon, comprising a shaft connected to eaelnof said cutter mechanisms and efiective twmdve all of said cutter mechanisms in unimm tn rotation of said shaft.-

11. Engraving mechanism com rising a pair of units disposed horizontal y spaced from each other and alined and each comprising a work support movable in one dimension along the surface being engraved and a cutter mechanism movable in another dimension along the surface being engraved, to thus provide relative movement between said cutter and said work support twodimensional along the surface being engraved;-a first common actuating means forrelative movement between said cutter mechanism and said work support two-dimensiona1 along the surface being engraved; a first common actuating means for effecting such work support actuation in all of said units in unison, comprising reciprocating means operatively connected to'each of said work supports and efiective to rotate all of said work supports in unison upon reciprocation of said reciprocating means; and a second common actuating means for effecting such cutter mechanism movement in all of said units in unison, comprising coordinating means con nected to each of said cutter mechanisms and effective to move all of said cutter mechanisms in unison upon movement of said coordinating means.

l3. Engraving mechanism comprising a pair of units disposed horizontally spaced from each other side by side'and alined and each comprising a rotary work support and a cutter mechanism movable transversely to produce relative movement between said cutter mechanism and said work support two-(1L mensionalalong the surface being engraved; a first common actuating means for effecting such work support actuation in all of said unlts in unison, comprising reciprocating means operatively connected to each of said work supports and effective to rotate all of saidwork supports in unison upon reciprocation of said reciprocating means; and a second common actuating means for effectin said cutter mechanism movement in all of said units in unison, comprising a shaft connected to each of said cutter mechanisms and effective to move all of said cutter mechanisms in unison upon rotation of saidshaft.

14. Engraving mechanism comprising a rotary cutter, cutter head means supporting said cutter for rotation and also for axial reciprosuch movement of said cutter head means.

porting means for automatically varying the it reciprocatory position of said cutter, comprising biasing means acting to reciprocate said cutter. in one direction, and stop means for limiting such reciprocationvariable automatically upon such movement of said cutter head means on said supporting means.

15. Engraving mechanism comprising a rotary cutter, cutter head means supporting said'cutter for rotation and also for axial reciprocation to varythedepth of the out, supporting meansimovably supporting said outter head. means, and means responsive to movement. ofsaid cutter headmeans on said supporting'means for automatically varying the reciprocatory position of saidc-utter, comprising biasing meansacting to reciprocate said cutter to deepen the cut, and stop means for limiting such reciprocation variable automatically upon such movement of said cutter head means on said supporting means.

16. Engraving mechanism comprisinga ro tary cutter, cutterhead means supportingsaid cutter for rotation and also for axial reciprocation to vary the depth ofthe cut, supporting means movably supporting'said cutter head means, and means responsive to, move ment of said cutter head means on said supporting means for-automatically varying the reciprocatory position ofsaid cutter, comprising a cam element-anda follower element co operating with said cam element, one element being fiXBCl on said supporting means and the other element being'carried by said cutter head means and movable'by said one element upon such movement of, said cutter head means upon said supporting means andv effect such variation in reciprocatoryposition of said cutter.

17. Engraving mechanismcompri'sing a rotarycutter, cutter head means supporting said ..cutter for rotation andalso for axial reciprocation to vary the'depth of the cut, supporting means movably supporting, said cutter head means, and means responsive to movement of s'aid'cutter headmeanson said supporting means for automatically. varying the reciprocatory position ofsaidcutter, com-,

prising-biasing means acting to reciprocate said cutter in one direction, variable stop means for limiting such reciprocation, a cam element, and ai -follower element cooperating with said cam element, one element being fixed'on said supporting means cnd the other element being carried by said cutter head means and movable by said one element upon upon said supporting-means and to vary said stop means. r V

18aEngrav1n-g/mechanism comprlsinga rotar-ycutter, cutter head-means supporting said cutter for rotation and also forreciprocation to vary the depth of the cut, supporting means pivotallyssupportingsaid cutter head means for oscillation-of said'cutter head means and said-cuttenabout; such pivot, and means responsive to such-oscillation of saidcutter head means on. said supporting meanst'or automatically varying the reciprocating position ofisaid cutter. J

19. Engravingmechanism' comprising a rotary, cutter, lcutter. head means supporting said. cutter for rotationandxalso for reciprocationto vary the depth of the. cut, supporting means pivotallysupporting said outteuheadmeans for oscillationofsaid cutter head means and said cutter about such pivot, and: means responsive to suchoscillation of said cutter-head means on said supporting means. for automatically varying the recip- 'rocating position of'said cutter, comprising biasing-means acting to reciprocate said outter in one; direction," andstop means for li1niting such reciprocation variable automaticallyrupon suclroscillation. of said cutter f ieadimeansonsaid supporting means.

20: Engraving. mechanism: comprising a. rotary; cutter, cutter head means supporting saidicutter for rotation. and also for reciprocationetovary; the depth .of the cut, supportingemeansz pivotally supporting-said cutterv headmeans foroscillation otsaid cutter head meansandisaidscutter about-such pivot, and means responsive to suchoscillation of said cutter head means :on said supporting means for automatically varying. the reciprocating position ofisaidicutter, comprisinga cam element and a follower element cooperating with said; cams element, one element being fixed on" said isupportingmeans and the otherelement; being carried. by 'saidcutter head meansand movablefby said one element upon such 1 oscillation; of said cutter head means upon;saidsupporting.means and to effect such-Q variation; in reciprocating: position of said cutter I I 21;; Engraving mechanism comprising a rotary cutter, cutter head means supporting said-;cutter'forarotationand also for reciprocation to vary the-depthot the cut, supporting'meanspivotally. supporting said cutter head'means foroscillation'of-said cutter head means andz'said cutter. about such pivot, and

means responsive torsuch, oscillationof said rovide for adjustment for engraving suraces of different elevation above said work supports; common actuating means for effectmg said work support rotation and said go cutter mechanism oscillation each in all of said units in unison; and adjusting means for effecting said axial movement'in all of said units in unison.

Engraving mechanism comprising a plurality of units eachcomprising a work support, a cutter mechanism, and meanssupporting said work support and said cutter mechanism for rotation of said work support and oscillation of said cutter mechanism "aotransversely, to produce relative movement between said work support and said cutter mechanism two-dimensional along the surface being engraved, and also for relative movements between said work support and 85 said cutter'mechanism in the general direce tion of the axis of said work support to thus provide for adjustment for engraving suraces of different elevation above said work supports; common actuating means for effooting said work support rotation and said cutter mechanism oscillation each in all of said units in unison; common adjusting means for; effecting said axial movement in ailiof said units in unison; and individual adjusting means for effecting additional such axial movement in each of said units individually.

24. Engraving mechanism comprising a plurality of umts each comprising a work support, a cutter mechanism, and means supporting said work support and said cutter mechanism for rotation of said work suppert and oscillation of: said cutter mechanism transversely, to produce relative movement;

56 between said work support and said'cutter mechanism two-dimensional along the surface ,being engraved, and also for movement of saidcutter mechanism and said work support both in the general direction of the CU axis of said work support, to thus provide for adjustment for engraving surfaces of different elevation above said work supports; common actuating means for effecting said work support rotation and said cutter mecha-i flfimismr oscillation each in all of said units in unison; common adjusting means for effecting said axial movement in all of said cutter mechanisms in unison; and individual adjusting means for effecting such axial move ment of said work supports in each of said units independently. W e

25. Engraving mechanism comprising a plurality of units each comprising a work support, a cutter mechanism, and means supporting said work support and said cutter mechanism for rotation of said work support and oscillation of said cutter mechanism transversely, to produce relative movement between said work support and said cutter mechanism two-dimensional along the surface being engraved, and also for relative movements between said work support and said cutter mechanism in the general direction of that radius of said work support extending through the cutting point, to thus provide for adjustment for, engraving surfaces of different radius; common actuating ;means for effecting said work support rotation and saidfcutter mechanism oscillation each in all of said units in unison; and adjusting means for effecting said radial movement in all of said units in unison.

26. Engraving mechanism comprising a plurality of units each gomprising a work support, a cutter mechanism, and means supporting said work support and said cutter mechanism for rotation of said work support and oscillation of said cutter mechanism transversely. to produce relative movement between said worksupport and said cutter mechanism two-dimensional along; the surface being engraved, and also for relative movements between said work support and said cutter mechanism one axial in the genzeral directionof the axis of said work support and theother radial in the general direction of that radius of said work support extendmg through the cutting point, to thus prov de for adjustment for engraving surfaces of different elevation above said work supports port and oscillation of said cutter mechanism transversely, to produce relative movement between said work support and said cutter mechanism two-dimensional along the surface being engraved, and also for relative movements between said work support and said cutter mechanism one axialin the general direct on of the axis of sa1d work supo I O and ofrdifferent radius; common actuatlng port and the other radial in the general direction of that radius of said work support f extending through the cutting point, to thus I provide for adjustment for engraving surfaces of difierent elevation above said work supports and of 'difierent radius; common actuating means for effecting said Work support rotation and said cutter mechanism oscillation each in all of said units in unison; common adjusting means for effecting said axial movement and said radial movement each in all of said units in unison; and individual adjusting means for eflecting additional such axial movementin each of said units independently.

28. Engraving mechanism comprising a plurality of units each comprising a'work support, a cutter mechanism, and means supporting said worksupport and said cutter mechanism for rotation of said Work su port and oscillation of said cutter mechanism transversely, to produce relative movement between said work support and said cutter mechanism two-dimensional along the surface being engraved, and also for relative movements between said work support and said cutter mechanism one axial in the general direction of the axis of said work support and the other radial in the general direction of that radius of said work support extending through the cutting point, to thus provide for adjustment for engraving surfaces of different elevation above said work supports and of different radius; common actuating means for effecting said work support rotation and said cutter mechanism oscillation each in all of said units in unison; a first adjusting means for efiecting said axial movement in all of said units in unison; and a second adjusting means for effecting said radial movement in all of said units in unison.

In testimony whereof I hereunto affix my signature.

LEGER S. CASTONGUAY.

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