US1627858A

US1627858A - Grinding machine

Info

Publication number: US1627858A
Application number: US450281A
Authority: US
Inventors: John F Morgal
Original assignee: BERNARD E CRABBS
Current assignee: BERNARD E CRABBS
Priority date: 1921-03-07
Filing date: 1921-03-07
Publication date: 1927-05-10
Anticipated expiration: 1944-05-10

Description

May 10, 1927.

J. F. MORGAI.

GRINDING MACHINE Filed uarch v. 192'1 6 Shee-ts-Sheet .2

. 1,627,858' J. F. MORGAL f ,.GRINDING MACHINE` May 10, 1927.

Filed March 7.. 1921 5 Sheetspsheet 5 J. F. .MORGAL GRIND'ING MACHINE May 927.`

Filed Haren 7. 1921 6 sheeiksheet 4 ai. i!

A wwwa Lm May l0 1927 J, F. MoRGAl.v

GRINDIN'G MACHINE Filed March v. 1921 e sheets-sheet 5 annoiato@ JH/V MRGL MM, gg,

Patented May y10, 1927.

UNITED ASTATES JOHN F. normar., or SPRINGFIELD, omo, AssIGNonQnY MEsNE BERNARD E. c BABBs.

,PATIENT OFFICE.

ASSIGNMENTS, T

GBINDING MACHINE.

'appucgaon'alea'xmn v, 1921. v'seran 110,450,281,

This invention relates to grinding machines and is designed more particularly for grinding articles, such as piston rings, which requlre grmdlng on two opposite s1des.

The object of thek'invention is to pro.

vide a machine which will Simultaneously grind both sides of an article; which will reduce said article to a uniform thickness with its sides in'p'arallel planes; and further, to provide such 'a machine which will be semi-'automatic in. its' operation. To this end it is a further object of the invention to provide means for operating, and controlling the. movement of, two opposed grinding L members; to provide means for supporting an article in position to be -acted upon simultaneously by said grinding members, and for rotating said article while'it is being so l. acted upon; and to so construct and arrange the grinding members and the support for the article that the former will automatically position the article in a plane parallel with the planes of the working faces of said grinding members. It is also an object of the inventionv to produce' 'such a machixief which will be of, a strong. durable construcv tail view of the spindle for one of the grinding members; Fig'. 5 is a sectional view taken. longitudinally vof the drivin shaft,

V showing the clutch and its control ing devices; Fig.' 6 is a-longitudinal, sectional view of the work-supporting chuck and its op'- eratinfr mechanism; Fig. 7 is a front elevation othe chuck; Fig.'8 is adet'ail viewV of a part of the controlling mechanism for the chuck; Fig. 9 is a section taken 'on the line 9 9 of Fig. 6; Fig. 10 is an end view of lthe spindle of Fig. 4.; Figa-11 is a ,detail view;l

^ of the locking late; g. 12 is a face view of the left han coupling member of Fig. 5; and Fig. 13 is a face view of the right hand coupling member.

In these drawings 5 I have illustrated one embodiment of my invention and have shown thev same as desi ne'd for-grinding piston rings but it will e understood that themvention is applicable to machines for grinding articlesv of otherkinds requiring a similar operation and that .the changes neces- Sarg7 to adapt the machine tov grinding of such other articles may be made without departing from the spirit ofthe invention. In that embodiment 'of the invention here illustrated, the mechanism is mounted on a frame comprising upright members 1 which` in the present instance, are inthe form of wallsvand constitute a housing within which a vpart of the mechanism is arranged. The

' frame also comprises a horizontal member or table 2 on which the grinding-and worksupporting devices are mounted.A As'here shown, the table has its 'outer edgeturned upward, as shown at3, toI form a flange or guard, which serves to 'prevent the fluid 'which flows over the work during the grind-l ing operation from escaping about the edges of the tableL The 'grinding mechanism,

`proper r preferably comprises two, rotary drinding' members, which Iare 'indicated at and, lin the form here shown, comprise grinding wheelsof emery, carborundum or other suitable material. 'Preferably, these grinding wheels .are so constructed as to' provide a relatively narrow grinding face. `To this end each wheel` comprisesa disklike body 5 havinga central opening and -provided with an axially extending annular, flange 6, theedge of which constitutes the working face of thegrinding wheel. These' wheelsJ are arranged with their` worklng faces opposed one `-tothe' other and lare Y mounted for rotation inthe same direction about coincident axes. Means are provided for separating the grindingmembers to permit the 'work to be placed in positionv be- .tween them and then causingthemv to operatively engage \the work. In the present machine this is accomplishedby 4impart n substantially equal axial .movement to' bot grindingmembers but it-.is not necessary to p' .moveboth members in order that-the two members may be se arated, and whereboth' members'are move it is notessential that ithey should be moved equal distances. s vhere shown each grinding member is mounted for lon itudinal' reciproeatory movement,v as wel as,for rotary movement, `and i `to this end each grinding member is mounted upon a sp indle,

(Fig. 4), which, in turn,

vis rotatably mounted. in. a -sleeve 8, this 'able manner. In the'present instance the l spindle is provided with a stud 12, screwthreaded at its outer end and extendingthrough-the opening in the disk-like portion of the-grinding member. Mountedv onV the stud 12 in the rear o'f the grinding member and confined between the same and the body of the spindle is agear 13 having an annular flange or bearing late 14 which engages the outer surfaceof t e grinding member. Ar-

ranged .within the grinding member. and engaging the .inner surface ofthe disk-like portion thereof is alplatey 15 which is held in engagement with thel disk-like portion of ther rinding member by a nut 16 mounted y tween the-plates 14. and

Iis held against longitudinal movement 1n its on t e screw-threaded portion of the stud 12, which nut serves to clamp the disk-like portion ov the grindinr member firmly be- 15. The spindle 7 sleeve 8v and the sleeve is held normally against longitudinal movement in the casing 9. `vThus, while the spindle and its members.v

l erably imparte pende y of the sleeve and casing-they are cause to move longitudinally with these Longitudinal movement is prefgrindp. member are lfree to rotate indecarried thereby-automatically and, in the present arrangement of the mechanism, lthese, parts are moved into and held in their retracted positions by means of a counter-- weight 28 and operative movement is imparted'thereto'by means of a cam I7 which acts upon the end of the casing 9. As here shown the cam engages a roller 18 carried by a lug or projection' 19 secured to and 'moving with the casing. The cam 'may be provided with one or more working surfaces and in the type hereillustrated it has .-two working surfaces, each of which 4isso arranged that the first portion of the movement of the cam moves the casingf9 and,

` consequently, the grinding member quickly toward the Work. As the grinding member moves into engagement with the work its movement slows down but it .is gradually moved -towardthework until the latter has been reduced toY substantially the desired thickness and during thev remainder of thev vmovement of the cam thegrmdlng member has no longitudinal' movement but serves merely to finish or smooth olf 'the ound surface of the work. The length( of the finishing operation is determined by they length of the concentric portion of the cam aidwhere a fine inish isl not essential it toth'e casing land parts may be of ve'ry short duration, it being ungrindi'g action will be regulated according to the particular work being done. I prefer to inter-pose between the longitudinally movable casing 9 and the cam an adjusting derstood, of course, that the timing of the Y mechanism to enable the distance between the cam and the casing to be ad'usted to compensate forl the wear on the wor ing :tace of the grinding member. I have, therefore, in the present instance, mounted the lug 19 upon'a screw-threaded stud 20. which extends into the en d of the casing 9, and is held against rotation therein but isl capable ofa longitudinal movement relatively thereto. Screw-threaded ,onto that portion of the stud 20 which projects beyond the end' of the casing is a collai` 21 having an operating handle, such as a hand wheel 22, by means of whichit may be rotated. This collar 21 bears against the-end of the casing A and Ait will be apparent that any rotation 'thereof will move the stud 20'relatively to the casing andv increase or decrease the distance between the end of the casing and the axis'of, the cam. The collar is provided with a fine scale whereby very exact adjustments may be made, Further, suitable means are provided Ato prevent` accidental interference with this adjustment and this device is here shown as alserratetl plate 23 adjusably mounted in agroove-24 in the collarfin frictional engagement with the teeth-of the stud to resist the movement of the colla'r relatively to the'stud. In addition to the device for making fine adjustments of the grinding wheel it is desirable that means.- should be provided for making longer adjustments -and`, to this end, the sleeve Sis provided with .a rib 25. having therein a series "of notches or recesses 26 arranged at fixed intervals and each adapted to receiveV the end of a screw 27 mounted in the casing 9. I By engaging this screw with different notches or recesses the sleeve may be secured in different longitudinal positions relatively to the casing. After this longer adjustment has 'been secured the exact or finer adjustmentnniay be secured by-'means of the collar '21 and stud 20. lVhile I have described but one grinding member and the manner' of supporting and operating the same, it 'will heunderstood that the two grinding members` are identical and that the description of the one .applies equally to the other. liurtherait will be understood that the cams 17 for the twoggrin'ding members are so arranged that the operative movement of the. grinding members will Abe simultaneous. Thus. it will be apparent that the two grinding members are moved toward one another until the distance between them is equal t0 the thickness the work is to have when the grinding operation is com leted. Wheii the these positions the continued movement-of the cams will bring the recesses thereof into -alinement with the rollers 18 and the counterweghts willmove therespective grindingmembers quickly to their retracted pos1.

tions, thus separating the same to permit of ltheremoval of' the work which has been completed and the insertion of another article to be ground.

A suitable work-supporting device is pro-A vided for supporting the workin a position td be simultaneously engaged by the two grinding members and this supporting device is preferably of suoli a character that it will permit the work tohave axial movement, thereby 'enabling' the Sallie to be moved into its* correct position by the grinding members as the latter contact therewith. This floating support is, however, of such a character thatwit will cause the work to rotate while it -is in engagement with the grmdmg member.'` Vhere the art1cles to be ground are hollow, as is '.the'case with the l rigidly secured to and preferably formed in! piston ringsfor which the present machine' is chiefly designd,'1 preferto use a chuck, such as is herein' illustrated.. The 4v.work holding device as awhole, which is illustrated in Figs. 6 -to 9, comprises a' hollow shaft 29. journaled' inA a .suitable bearing bracket 30 on fthe table 2.A Mounted on one end otjthis'hollowshaft 29 is'a chuck which, in the form here shown, consists ot a, hea-d 31 screw-threaded'onto a vstud 32 which is tegral with the'shaft 29. The head 31 is provided with a plurality of radial guideways, in the present instance, five, in which are mounted a correspon-ding plurality of' fingers 33 capable of radial movement and each provided with projection or pin 34 which extends through a radial slot 35 in the head tocontrol the radial movement of' the respective fingers. Extending about the .several pins 34 is a resilient member 36, such as arubber band or spring, which tends to move the several fingers 33 inward. Slidably mounted iwithin the hollow shaft. and extending through the head 3l the chuck is an operating rod 37 having a tapered end or head 38 arranged centrally of' the chuck head and engaging the in ner ends ofthe several fingers 33, these ends being beveled to fit the'taperedsurface of the'cud of the operatingrod.. lIt will beapparent that 'this construction is such thatthe fingers 33 of the lchuck will be held normally in their retracted positions but that longitudinal .movement of the operating rod 3T will move the fingers outward against. the tension of the spring or retracting member 36,( thereby forcing the outer endsof the fingers-into env gagement with the inner surface of the hollow work. or pistoniring. The outer ends of the fingers are provided with portions adapted to grip the surface of the work to cause it rotate with the chuck. In the present instance the outer ends of the fingers are beveled rearwardly so as to provide the for-` ward portions thereof with edges which will .bite into the work and hold the same against rearward rotation relatively to the chuck. Further, it will be noted that the fingers are capable of independent movement so that they will accommodate themselves to irregu 'ing member or gear 39 which is rigidi se-l cured thereto at that end opposite the c luck head and a spring 40 is coiled about the end ofthe operating rod, which Aprojects be 0nd that end of the shaft remote from the c uck head, and is confinedbetween the end-of the shaft and a collar 41 securedtothe end of' the ope1ating"`rod. Thisspring serves to' move the taperedhead ofthe operating rod into operative engagement .with the fingers and to maintain aconstant vpressurelonl .the

lingers, which pressure tends to hold them in engagement with .the work. To release the lingers from the work, to permit the removal of the latter, the rod is moved longitudinally against the tension of the spring 40, this being accomplishedv by means of .a foot lever 42, Fig. 3, pivotally mounted on the frame near the bottom thereof and connected by means of a rod 43 with a crank arm 44, Fig. 6 rigidly secured to a rockshaft 45, Fig. 8, rotatably mounted near the end of the operating rod 37 and having a. finger or projection 46 adapted to enter a transverse slot 47 in a rod 137 reciprocally mounted in bearing 138 and having at one end an arm 139 arranged to engage and actuate the operating rod 37. Thus the pressure of the foot on the foot lever 42 will rock the shaft 45 and thereby impart longitudinal movement to the operating rod against the tension ofthe spring 40, thus moving. the tapered head of therod away from the fingers 'and lpermitting the latter'tofbe moved inward and out of engagement-with thework by means of the retracting member 36. To facilitate the placing of the workfon the` chuck I.prefer to "provide the same with a guide or stop member which i is in the'form of a spider 48, Figs. G and 7.-

having in the present. instance, three arms 49 radiating from the axis of the shaft' 279 and. each provided'with a roller 50. This spider is arranged in the rear of the chuck fingere 33 and in such a position that it will form a- 'of he work as stop to limit the movement the latter is placed over the' fingers. Thus, when a pistou ring is being placed upon the chuck itis simply placed about the fingers and moved into engagement with the rollers and the fot lever released to permit the chuck fingers to engage the7 inner surface of the ring. As has *been explained no further adjustment is necessary as this will be accompl-ished bythe grinding-members. It is only necessary that a gui-de should be prnvided of such a character that it will faciiitate the placing of the Work in a position to be. engaged by the fingers. Thev rollers permit the Work to rotate freelyv relatively to the spider or guide but ordinarily the positioningv of the work by the grindi'g members will move the same out of engagement with these rollers. j

One chuck and one guide or spider will take Careof work of different diameters but it is not 'desirable that the chuck fingers should have a range of movement sufficient to take care of any wide variation in diam# eters. It is preferable that separate chucks .should be used. Likewise, while the length ofthe rollers 50 of the spider i-s such that they will accommodate work of different diameters it is preferable that the spider should be removed and one of different size substituted Where the work variesV materially in diameter. The spider is adjustable toward and away from the chuck fingers to accommodate it to the varying thickness of motor V57 of suicient power to drive thel Vns the work and, as here shown, the three arms 49 are separately mounted by providing veach with a base 51 which is slidably mounted in a groove 52 of the bracket vcarrying tlchuck. .To lock. the. arms in adjusted 'posttions each base is prdvided with a .longitudi- 4o nal groove 55 into which extends one edge of a disk 54, the other edge of which extends into a socket 155 where it may be engaged by the head of a screw 56, thus clamping. the spider firmly in position.

The several parts of the mechanism may be driven in any suitable' manner and from any suitable source of power but I prefer to drive the several parts ofthe mechanismA from a single source of power and to distribute the power and reduce the speed of movement as may be necessary. To this end.v

AI have mounted on the table 2 an electric complete mechanism. This motor isdirectly connected with -a main driving shaft 58 mounted'at its ends in suitable bearings 59 and havingits intermediate portion in the form of a ,druml 60 about which extend two` endless driving members. In thepresentinstance, the drum is provided with gear teeth extending for substantially the full-length thereof and, with the iexible driving mem- I bers, which are shown at 61, comprises what is known asa noiseless chain drive. These iiexible driving members extend about the cured to the spindles for th grinding members and thus these spindles are driven atY a very high rate of speed. y Extending about one end o the toothed drumv or-gear 60 is a 7o second Hex ble driving member 62, Fig. 3 of similar character, which extends' about a gear' 63 rotatably mounted on a bracket 64 secured to the underside'of-the table 2. fSecured to the gear 63 is a smaller 'gear 65 75 from which, by means ofV a flexible drive 66, the power is transmitted ata reduced speed to a gear 67 which is mounted on a -longitudinal shaft 68 journaled in bearings69 in the end members kof the frame and '1n-an in- 8'0 termediate bracket 7( Thisushaft 68 pro` jects beyond the end members'of theframev and is provided with suitable worms 71 Fig. 5 meshing witlr worm gears 72 rigidly secured to the lower ends of vertical shafts 7 3, 85 to the upper endsof which are secured. the cams 17. The gear 67'V is loosely mounted on the. shaft 68 and is adapted to be connected thereto by means of suitable clutch mechanism. As here shown the gear 67 is 90 provided on one face with aclutch member 74 Fig. 5 adapted to cooperate with a clutch member 75 rigidly secured to the shaft. Springs 76 confined between collars 77 and y 78 secured to the shaft and to the gear, re- 95 spectively, serve to hold the c'lutchmembers normally in operative engagement. Preferably, the collar 78 isfcennected'with the gear for longitudinal movement. only and not for rotary movement and, to this end, a bearing, preferably a ball bearing, 79, is interposed ghetweenthe collar and the gear. I prefer to utilize cooperating cams to impart longitudinal movement to the'gear 67\and.thus separate the clutch members. To this end,l I have mounted on the shaft 68 two cam members 8() 4 and 81, both be-ing'so connected witlrthe shaft that they are free to rotate thereon and the cam 80 being held against longitudinal movement on the shaft. S-lid' 110 ably mounted in the hub of the clutch niem-v ber 75 are a series of pins 82 which are so connected with the cam member 81 that any longitudinal movement of that member will 'be imparted to the pins, and through the 115 medium of the pins torgear 67 and clutch member'74. Preferably, a bearing, such as a roller bearing 83, is interposed between the Y pins and the cam member 81 so that the rol tary movement of the ins withthe clutch 120 member 75 will not a ect the cam member. 81. Y The cam member 81 is provided with an arm 84 which is secured at its outer' end to a fixed support.v such vas one of the'vertcal membersof lthe frame so that this cam is 12.5 held against rotary movement but is free to move axially of the shaft. The .cam member 80 also has an arm or lever 85 which is connected at its outer end with -the rod 43 `leading to the foot Alever 42. Thus, when,

the foot lever is operated the cam 80` will rotate and because of the cooperating faces of the cams 80 Aand 81 longitudinal movement will be imparted to the later and thence through the pins '82 to the gear 67, thus.

separating the clutch ymembers and interrupting the movement of the shaft 68. The

connections between the rod 43 and thc cam v 80 and the operating rod for the chuck are so-arranged that when the foot lever is depressed the clutch members on the shaft 68 will lfirst be separated/and then the operating rod actuated to retract the fingers ofthe chuck and, vice' versa, when the foot lever is released and allowed to return to its normal position under the action of the spring i to one portion of the shaft 68.

86, the lingers of the chuck will engage the work before the clutch memberscome into engagement. This is important because the shaft 29 of thechuck is,drivcn from the s haft`68 and rotary movement im arted tow the chuck while the fingers were retracted' would result in. the work being thro,wn ofi:l of ythe same. The drivingf connectionv between the shaft 68 and the chuck comprises a. flexible driving member 87 Fig. 3 extend- Y ymove in proper timed relation I prefer to form the' shaft 68 in two,v arts and to conneet these parts bya coup ing consisting of

disks

94 and 95 Fig. 5 each rigidi secured `,ach disk has a series of openings. 96 formed near the edge thereofl and arranged concentrically to the axis thereof. The, openings of .each

vseries are spaced the same distance apart but` the openings of the two 'series are spaced different distances apart. These openings are adaptedto receive a .pin 97 or other connecting device and', inthe resentA instance,

the openings are inA the orni' of recesses 'formed vin the inner-face ofthe disk and extend but part way through the disk. By

shifting one'f the disks about its axis it can Ibe moved" through a series of short steps l ."shaft to be securedand thisv ad]ustment of relatively to the other disk and at the end of each step of its movement someone ofthe recesses therein will register with one of thev recesses in the other disk, thus enabling a very fine adjustment of the two parts ofthe the shaft likewise adjusts .the cams. The

two disks are rigidly connected one to the other-.by means of 4*bolts 98 and, in order that further adjustment maybe had, one of the disks, inthe present instance the disk 95, is

provided wi concentric slots 99 through which the bolts extend.

It is usually desirabie. that grinding ofthis `kind should be done in the pre-sence of a fluid and, in the present instance,- I have provided means for causing such a fiuidto flow over the work while the grinding meinbcrs are acting thereon. This fluid is usually water to which has been added a 4substauceto prevent rusting and it is contained in a receptacle 100 Fig. 1 within the housing foi'medby the side walls 1 of the frame. A. pump 101, which may be of any suitable character, such as a small rotary or gear pump', is connected with lthereceptacle by ,means of a ipe '102 and has connected therewith a disc large pipe 103 which leads to a oint alve the work and discharges directy onto the Same. The fluid falls from the work onto the tablel 2 which is provided with a drain pipe 104 to return the same to the receptacle 100. The pump 101 may be driven in any suitable manner but preferably it is driven by a flexible driving member or chain 105 passing about asprocket wheel 106 on the shaft 68 and about a. second s rocket wheel 107 which is connected In the vpperation of grinding wheels of this character the -cutting faces of the wheels often become glazed so as to reduce their cuttingqualities and increase the tendency to heat. To correct this condition the face of the wheel must be dressed off by the use of a suitable implement. To enable this ldressing process to be accomplished quickly and easily I have provided a dressing implement whichV is mounted so that it can be brought quickly into operative relation with the two wheels and will dress both working- -faces at the same time. Preferably, the impleinent is mounted upon a cover plate or guard 108,which extends over the grinding wheels. The implement itself consists of aI support or guideba'r 109 slidably mounted in nos a bracket 110 which is rigidly secured to the guard plate and has at its lower end a crosshead or bar111--provided at its ends with suitable devices for dressing the faces of the wheels, such, for example, Ias diamonds, as

shown at 1 12. The guide bar 109'is mounted centrally with relation to the two rinding wheels and the cross head 111 is of ,such a -'length that when the two grinding members are invtheir separated posit-ions the implev ment may be placedbetweenthem and the dressing devices 112 will act simultaneously1 upon the faces ,of the two wheels. To permit of the cross-head being brought into operative relation with the grinding wheel the `guidebar 109 is provided with teeth, as

"shown at 113,'which. mesh with a pinion 114 to whichis connected an operating handle or lwheel '115.` i. thumb screw 116 serves to lock the device in its operative or inoperative position. f A

The operation of the device will be readily iunderstood from the foregoing description and it will be. apparent that the operator has but to depress the foot lever, place a ring in position on the chuck and release the footlever to cause the grinding members to opera-tivelyengage the ring, center the same and grind it to the desired thickness. As soon as the grinding operation is completed the grinding members are retracted to their separated positions and when the grinding l0 members are so retracted the operator again depresses the foot levers thus interruptingr qthe operation ofthe parts, releasing the linished ring and permitting the same to be removed, an unfinished ring substituted therefor and the operation repeated. In the present type of machine the cam` makes approximately four revolutions per minute and inasmuch 'as the rings can be changed very rapidly and two operative movements are impartedto the grinding members for each revolution of the cam it will be apparent that severalV rings per minute can be ground. Further, it will be apparent that the operation of thefmachine is exceedingly simple and that the machine does not require any large degree of skill for its operation. Further, the parts are of such a character that they are strong and durable and will not be easlly disarranged or broken. The'means which is provided for adjusting the grinding members enables the ent-ire operative portion of the same to be utilized. y

While I have shownand described one embodiment of my invention it will be unlderstood that this has been chosen for the purposes of illustration only and that I do not desire to be limited to the details of con- -struction shown and described, for obvious modifications will occur to a person skilled in the. art. Further, it will be understood that While the grinding members of the present machine are so arranged that the opposite sides of the finished ,Work are inpar allel planes, this-is not an essential part of as a whole, or in part, may be embodied in 'machines designed for grindingvario'us articles which require grinding on two sides.

what I claim as new anddesire by vLetters Patent, is l 1. In 4a grinding machine,.two grinding.

membersmounted for rotation about a comto secure mon axis and having` opposed grinding faces, means for rotating said grinding members, means for moving one `of said Vgrinding members axially-toward and from.

the other grinding member, awork support mounted for rotation about an axis sub# .4"stantia'llyparallel with the axis of said grinding members and having means for 'supporting an 'article to be ground for'rotaftion about the axis thereof, a portion of said article extending f between. said grinding 05 members so that the lateral faces ofv said -porting means to permit it to be'finali the invention, but that' the invention, eitherv article will be simultaneously acted upon by the respective' grinding members, said supporting means 'being of such a character that said article will be autonmtically positioned thereon' by its contact witlr said grinding members, and means for rotating said work support .during the grinding-op` eration tocause the entire circumferential portion of said article topass between said .grinding members.

2. In a grinding machine, two grinding members mounted for rotation about a common axis and having opposed` grinding faces. means for rotating said grinding. members, means for moving one ot' said grinding members axially toward and from the other grinding member, a work support mounted for rotation about anl axis substantially parallel with the axis of said grinding members and having means for support.. ing an article to be. ground for..V rotation about the axis thereof, av portionv `of'said article extending between Said grinding members so that the" lateral faces of .said article wil1be simultaneously acted upon by the respective. grinding members, said supporting means being movable into and out 0f operative position vwith relation to said article, guides to initially position said article with relation to said' supportingmeans whenV t-he latter is in an inoperative position,' said article'vbeing supported `for axial movement with relation to said supy positioned by contact with said grinding mem* bers, and meansV for rotatingsaid work support during the grinding operation to 'cause the entire circumferentialY portion of said article to pass between said grindingmembers. V- 10.3

l3. In a grinding machine, two grinding members mounted 'on separate spindles which are separately' Vmounted -for rotation about a common axis and forv axial move- A ment, means acting on` said 'spindles to nor-v 110 mall` hold. said grinding members in separate lpositions, cams. acting on said spin-s lll() 'dles to move said grinding,` members one to- I-Iaving thus fully described my inventin,

ward the other, a two part shaft the two parts of which are connected with the re- -ranged to support .the work between thesame to cause 1t to be acted upon simuitai` .neously by bothof said grinding members.

4. In-a grinding machine, two grinding members rotatable about acom'mon `axis and 1"-'5 `movable toward, and from each other, cams acting' on the respective grinding members to unpart axial movement thereto, a two part shaft the two parts of which are connected with the respective cams, means for 13 adjust-ably connecting the two parts of said shatt one to the other` and a rotatable work .support mounted adjacent-to said grinding members'and arranged to support. the work between the same to cause it. to be acted member to rotate with said support/but will permit it, to move axially thereof when engaged by one of said grinding members.l

'6. ln a. grinding machine, two grinding members rotatable about a common axis and movable toward and from each other` a work support to support an article. to be `ground between sald vgrinding men'ihcrs, means to auton'i'atically move said grinding members simultaneouslyl into engagement with sa-id article, and means under the control of the operator to interrupt said movement of said grinding members without interrupting the operation of said machine as '30 a whole.

7. In a grinding machine, two rotatable grinding members, means to move said members toward and from each other, a work support. having means to engage the J5 work and support the same while it is being ground, means to rotate said work support,

- and means to interrupt the rotation of saidy work sup ort independently of the operation of said grinding members.y i l 8. In a grinding machine, two rotatable grinding members, means to move said members toward and away from each other, aV work support` havin .means to engage the work and support t e same while it is being ground, means to rotate said work support, and a single device under the control of the operator for first interrupting the movement of said grinding members relatively to each other and the rotation of ksaid work-support and then to release said workfrom said work support.

9. In a machine -or grinding rings, two

grinding members rotatable yabout acom-l mon axis and capable of axial movement toward and away from each other, a work. Vsupport comprising-a head adaptedv to enter a ring and having radial; fingers to. engage .the inner surface of said-ring and support:v the same between said grinding 'members and means for'rotatingV said head and for imparting axial movement to said grinding members.

10. Ina grinding machine, two grinding members, separate spindles lfor the respec- 'a tive grindin'gmembers, a bearing for each spindle, means to slidably support said hearings, whereby said grinding members may rotate relatively to the respective bearings and may bemovcd axially therewith, and means for autoimltically and simultaneously imparting axial movement to said supportingmeans. ,i

l1. ln a grinding machine, a grinding member, a spindle therefor, a bearing sleevev in which said spindle is rotatably mounted, a slidable casing,'. means for securingl said sleeve insaid casing, and meansl'for imparting longitudinal movement. to said casing.

l2. In a grinding machine, a. grinding member. -a spindle therefor` a slidable casing` means for rotatably supporting said spindle in said `casing, 'a' cam, and a .part connected with said casing whereby said' cam may impart longitudinal' movement to saidcasing` and meansfor varying the dis'- tance between the axis ot'said cam and saidv casing to compensate forth'e wearingaway of said grinding member. a v l A.

1.3. In a grindingmachine,abparing, a casing slidably mounted in'said bearing and held against rotation therein,4 a bearing sleeve mounted in said casing and held y against' movement relatively thereto, a spludle journaled .in .said bearing sleeve, a grinding member carried bysaid spindle,f'a cam, and a part carried by said casing and arranged to he acted upon by said cam to im'- part longitudinal movement to said casing andsaidgrinding member.- A j Y 14. ln a grindingmachin'e. a. bearing, a casing slidably mounted in saidbearjng and heldj` against rotationtherein, a bearing sleeve mounted in# said casing and held l against rotationv relatively thereto, aspindle journaled.- in said bearing sleeve, a grinding member earriedfby, said spindle, a cam, a stud carried-by said'casingl andhavinga partarran'ged to' be engaged by said cam, and means-for adjusting said stud relatively t0 said casing to compensate for the wear of said grinding member.' l

15. In a grinding machine, a bearing,l al casing slidably mounted in said bearingand. having rotation therein` a bearing sleeve adjustably mounted-in' said casing and held against rotation relativelyffthereto, a spindle journaled in said-sleevtyay grinding member carriedv bysaid spindle, a cam, a stud adjustably mounted on said casing, and apart carried by said stud and arranged to be engaged by'said cam-to impart longitudinal movement to said casing, and said grinding member.

16. In a grinding machine, a bearing, 'a casing'slidably mounted in said bearing and having rotation therein, a bearing sleeve adjustably mounted insaid casing and heldv against rotation relatively thereto,- a spindle j ournaled insaid sleeve, a grinding `member carried by said spindle, a cam, a stud ad- 130.

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justably mounted on said casing, a part carried by said stud and arranged to be engaged by said cam to impart longitudinal movement to said casing and said grinding member, said stud being held against rotation relatively t'o said casing and having a screw-threaded portion extending lrbeyond the end of said casing, land a collar screw- 'tbrcaded onto said stud and bearing against part carried by lsaid stud `and arranged' tov be engaged by Said cam to impart longitudinal movement to saidcasing and said grinding member, said stud: being h eld against' rotation relatively to said. casing and having a screw-threaded portion cX- tending beyond the end of said casing, a collar screw-threaded .onto said `stud and bearing against the end of said casing, and means for preventing the accidental movement of said collar on said stud. l

18. In a grinding machine, two rotatable grinding members movablev toward and from each other, means for moving said members toward eachother, a rotatable work holder for supporting the work between said grinding members. a. shaft, oper- .ative connections between said shaft and said work holder andgbetween said shaft and said means for .moving said grinding members, a driving member for said shaft, a clutch connection between said driving member and said shaft, and means foractuating said clutch.

19. In a grinding. machine, two rotatablegrinding members movable toward .and .from each other, cams 4for moving'said members toward each other,- a rotatable work holder .for supporting the worl between saidgrinding members comprising an operable part to retain the work thereon,

a. shaft, operative connections between said shaft and said work holder and between said shaft and said cams, 'adriving member for said shaft, aclutch connection between said driving member and said shaft, and a.

device Afor interrupting saidclutch connection and ,operating'said work holder to release the work. y

20. In a grinding machine, tworotatable v grinding j members 'movable' toward and away from eachother, cams for moving said members toward each other, a rotatable work holder for supporting the work bctween said grinding members comprising an operable part to retain the work thereon, a shaft, operative connections between said shaft and said work holder andfbetwcen said shaft and said ca lns, a driving member for said shaft, a clutch connection between said driving member and said shaft, and a 'foot lever for interrupting said clutch connection and operating said work holder' to release the work.`

21. In a grinding achine, the combination, with two.rotata )le grinding members movable toward and away from each other, cams for moving said members toward each other, a rotatable work holder for supporting the workbetween said grinding members comprising an operable part to retain other to adjust said cams relatively one to` the bther, and a work holder to support the work between said grinding members# 23. In a lgrinding machine, two rotatable grinding members mounted for axial movement, cams to act upon the respective members to move them toward each other, a two part shaft having its two portions connected with the respective cams, coupling members secured to the adjacent ends of the respec tive shafts, said coupling members each having a concentricmseries of openings, the openings in one member being spaced apart ra greater'distance than the openings in the other member, whereby the rotary adjustmentof said coupling members will bring different openings into -alinement, a con.-

-necting device adapted to enterpthe two openings lwhich are in atlinement, means yto prevent further relativemovement of said members, and means Afor connecting the two members vof saidcoupling one td the other.

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In testimony whereof, I affix my signature hereto.

JOHN F. MORGAL.