US1600089A - Gauge - Google Patents

Description

Sept.` 14 1926.

' G. G. BUSH GAUGE File-d Dec. l5, 1921 3 Sheets-Sheet l F als ATTORNEY.

sept. 14,1926.

G. G. BUSH GAUGEv Filed Dec. 13, 3 Sheets-Sheet 2 ORI lb 'l fofr xNvENT n BY f ms ATroRNEY.

sept. 14,1926. 1,600,089

G. G. BUSH GAUGE Filed Deo. 13, 1921 s sheets-shew 5 menteuse. 14, 1926.

UNraDl STATES PATENT* oraloef GIOBGE G. BUSH, Ol' (BRISTOL, CONNECTICUT, ABSIGNOB TO THE NEW DEP-ABTUBE IANUFACTUBING COHPANY, Ol' BRISTOL, CONNECTICUT, A. CORPORATION OF CON- NICTIOU T.

Application ned December My invention relates to gauges, my object being to provide a structure which is extremel accurate in its operation, can be used or 'gan g objects of different sizes I andcharacten can be eiciently employed by inexpert workmen, and has its parts well protected. To this end, and also to improve nerally upon devices of the character incated, my invention consists inthe various l matters hereinafter described and' claimed.

Although in no wise limited to such use, ny present apparatus is 'particularly adaptto gauge -race-parts of ball bearings as they are being ground, the rst twelve iig- Al ures of the accompanying drawings showlng-lan embodiment of my .invention especia y suitable for inside gauging (such as gauging the interior diameter Aof the race portion of a race-cup for ball bearings), 90 while the remainin figures show an embodiment more .particularly adapted to perform outside gaugin (such as gauging the exterior diameter o .the race-portion Vof a cone for, ball bearings.)

In the accompanying is a front elevation, the gauge being shown mounted upon a grinding machine and in operative position with respect to the work, certain of the parts being indicated in sec- 80 tion and some of the parts being broken away; Figure 2 is an end elevation, a .portion of the supporting plate being shown in section; Figure 3 is a top lan view, a fragment of the work being indicated, in sec# tion, in its operative relationship to the gauge; Figure 4 is a view similar to Figure 3 but showing' a piece of work of different character from that shown in Fi re 3, the gauge being slownin correspon ingly ad- 40 )usted position; Fi re 5 is a longitudinal sectional elevation s owing the casing, certain of the vparte being broken` away; Figure 6 is a fragmentary view ofsuch casing chiefly vin `front. elevation, certain -of the arts beinghown in sectionl and thecover ing reinoved; Figure 7 is a transverse sec- Y tional elevation on about the line '7 7l of Figure 6, 'looking in the direction of the ar'- rows; Figure '8 1s a similar viewxon about 50 theline 8-8 of Figure 6; Figure 9 is a face view of the stung block; Figure is a sectionalv elevation on about the line 10-10 l ofFi'gure 3-,-`looking in'the direction ofthe drawings: vFigure 1 davon.

1a, man.'A semi ne. 522,077.

arrows; Figure 11 is a fra enta sectional elevationon about the inne ll-r-yll of Figure 3 looking-'in the direction ofl the arrows igure 12.is a fragmenta bottom plan view ofthe skirt of the carrier; Fig- Nure 13 is a longitudinal elevation, partly 1n section, showing av modifiedV form.; Figurel y14 is an end elevation, partly in section, -of the same; Figure 15` is a fra entary view, partly in section'- on about 5111; line 15-15` of Figure 13, looking inthe -direction of the arrows; Figure 16 is a face view ofthe re-A movable pivotplate Figure 17.l is'a trans-v verse sectional elevation oni about the'lne 17-17 of Figure 13, looking inthe direction of the arrows; Figure 18 is 4a similar view on about the line 18-18; Figure 19 is a top plan view showing the gauge 'of Figi ure 13 in relation to its work, certainoftheA parts being brokenaway; Figure` 20 is an elevation, partly in section, particularly showing the supporting' elements; and'Fi'g- 75 ure 21 is a diagrammatical view, a fragment y of the work belng shown in section. Referring first more particularly` ures 1-12, A indicates a portion of the customaryoscillatory head of a grindingmachine, this head oscillating as upon the stud B and carrying the usual rotatable chuck, or work support, C forthe work X (here rshown as a cup memberof a ball bearing), while D indicates the usual rotary spindle carrying the customary reducin"l such as the ordinary grinding whee E, which, ,;f when the parts are adjusted to their usual operative positions, engages apoint 'of; the

ball race of the cup X so thatthe ball race is ground (andthe interior' diameterof the l race-cup is thereby increased) as thefgrind- Y, ing wheel E rotates about the'center of the f s indle D while the worlr X is rotated about t e center of the chuck and oscillates u o`n the center. f the stud B, all vof this bemg lold and well known. 'Y

I I mount myjgaugeup'on the oscillatory head A, prefer-a ly through the instrumen- *jtalit of a vertical bracket fastened to the and" a horizontal supporting plate 2 fastened upon the bracket, and totha't supportin platel connect afcasing-'oroarrier 3 whic carries a gauge-barfilongitudinally slidable in guides (Figure 5)' inthe-"carrier and itself carrying the 'gauge-point 5 adapt ed to contact with the work,I as-shown in the lever 6 by the customary spring Figures 1 and 3. Av lever 6 (Figure 5) transmits the gaugingy movement of the gluge-bar 4 to the customary plunger 7 of t eldial-indicator 8, conveniently mounted upon a post 9 on the casing 3 and` having the usual pointer `10 (Figure l14), this plunger 7 being forced downwardly aga(inst not shown) in the interior of the indicator, and the spring 11 (Figure 5) vforces the gaugepoint 5 towardthe casing 3 and into gaug-l ing contact with its work. The carrier 3 1s pivotally mounted upon itssupport, 2, (as by means of the spindle 66, Figure 10) to freely oscillate during the gaugingl action, so that during that action the gauge-point 5,is free to move into any-position it may select across the face of the work (as in the 20 the gauge-reading upon the indicator 8 is noted (usually by turning the indicator dial to Abrin its zero under the pointer 10 ,as lthat pointer stands ywhen the gauge-point L5 is engaglng the interior surface of the master-cup), and then the unground cups are successively substituted in the chuck for the master-cup and are there ground, the

gauge, of course, being, by the operator,

swung out of the way durlng the removal of aground cup and lthe insertion of a new one, but being swung back linto gauging position when the grinding of the new cupA has. started and being maintained invsuch pos1t1on while the grinding proceeds, the -gri'ndingbeingstopped when the indicator polnter showsthe same reading that it did when applied tothe master-cup. Of course.

the gauge shows the standard reading only when the gauge-point stands the same dis- N tanceefrom: its center of movement (a, Fig- 1dus ure 3) that it didwhen the gauge was calibrated in the master-cup, but yshould the gauge-point, during the grinding of a new cup, not happen to lie' in just the same vertical line of the circle of the cup (as thepartsy are "shownin Figure. `3) as -that .in

` which it lay in the .master-cup, the reading will `be' erroneous, that isto say,y willnot indicatev the' same interiordiameter which the masterc'u'p had; for example, 'if in the master-cup the gauge-point 5 had engaged the race-way b' at the point shown in Figd ure 3 but (through, say, some wear of a stop-pin, or otherwise) should engage the similar race-way of the new cup at a point in Figure 3 above or below the point of engagement shown in that'ifigure', it is Vquite obvious that the same gauge reading which indicated the interior diameter of the master-cup (thestandard) would be shown with 'respect to the new cup only when its interior diameter was different from that of the standard. However, by making the car'- `rier 3 free to oscillate about its pivot a and `thus'making the gauge-point 5 free to seek and find itsl point of contact with the work p the abeve-mentioned difficulty, yis obviated lbecause the gauge-.point will lie in the same vertical line in each cup, as the parts are shown in Figure 3,--thevgau e-point under pressure of the spring 11-y wi that point in the cross-section of the raceway which (point) is nearest the pivot-A point a, and that, of course, -is the point at which' the cross-section of the raceway-arc is intersected by the line from the pivot a 'to the center from which the arc b is struck, so that the arc portions upon each side of the point toward whichv the gauge-point 5 is being drawnl are, roughly speaking, higher than that poi-nt of intersection andthe gau e-p'oint will, consequently, al-

own the arc untilit reaches Yways slide point, nearest lto. the pivot a.

that lowest fThus, asthe chuck, the oscillatory head A,

and the grinding spindle are (as. is common) so set that they produce only similar circles and arcs at each grinding, andas the gaugeoint is freeto find' its point of rest upon t e indicate" a given reading for only circles of the same diameter and, therefore, the interior diametersof the cups are the samet Of course, the point a in the sup.- port 2 alords the base from which `the gauge measures its distances.' v

' The rod, 0r gauge-point-carrying bar, 4'

is protected lby the casing-3 and supported l always seek same vertical line of these lsimilarclrcles and arcs vin each cup, 1t follows thatr when in one of these circles the gauge-can when in the end. walls 12 and l'thereoffthe wall Y 13 being shown considerably thickened, longitudinally of the casing, m order -to roduce a block portion which gives a long,

rm support for the rod, and I prefer to e provide these end walls with bushings 14 and 15 which are lsecurely driven into the unvaryin path of longitudinal movement- The amp ifymg in 'amanner to which I ceived in an elongate vertical slot 18 of the rod 4, while va substantially horizontal arm 19 of the'l'ever has the plunger 7`resting upon it. Preferably, in order to reduce -end wallsl and whosev bores are accurately ground'toaiford a nice sliding fitnfor the rod 4, 'which is'thus confined to a single,

lever 6,-falso protected byV the casing and pivoted at 16 in its 'chamber'.

shall latermore'l fully referghas a de ending arm 17. re`

friction and therefore enhance the sensitiveness ofthe gauge, I roundthe shoulder .of the bar against which-shoulder the lever arm 17 bears at what may be termed the forward end of the slot 18, and I bevel the lever arm, 17 as at 21 to leave a rela- 'tively narrow surface `against which the shoulder 20 engages, 'thus` permitting the lever arm and the shoulder 2() to have relative movement withonly small areas of surfaces in contact with each other but avoiding sharp edges whichy would'wear away or dig into each other and thus destroy the acl' curacy of the gauge.' The spring 11, coiled about the rod 4,'has'one end bearlngagainst a, washer 22 which contacts. with a shoulder 23 of the casing, while the-'other end of the spring bears against a washer 24 loosely surrounding the rod 4 and abutting against a4 pin 25 through the rod, this pin being adapted to contact with the inner side'ot the end wall 12'of the casing and thus limit the movement of the rod 4 in one direction.

In order to further steady the gauge-bar 4 -I' prefer to provide a guide-bar 26 extendling through the end wall 13 parallel with the rod 4 and 'preferably sliding ina bushing 27 which corresponds to the bushing 15 and with which the guide-rod 426 has a nice sliding fit. A head block 28 is rigidly connected to thev outer ends-of the rods 4 `and 26 and has a finger 29 extending centrally4 tric to itsportion in the bearing 4 27, as indicated in a greatly exaggerated way in Fig# ures 5 and 9 because in this vway any slight variation in dist-ance between either the rods or the sockets 30 can be compensated for by slightly turning the rod-'26 in its socket.

I' Of course,rin theusual operation of grind.- mg .a great amount of dust is created and considerable water or coolin Huid constantly runs over the materia being acted upon. Preferably, therefore, in order to prevent ingress of extraneous matter into the casing 3, and especially to prevent its lngr'ess into the bushings 15 and 27, I rovld'e a stutling block 32 which is attac edl to the end of the casing and has'` openings 33 and 34 throughwhich the yrods 4.and 26 work, and thisvstuiling block has, on its inner face and about .the said openings, recessed seats35 which receive washers 36 of felt orthe like which closely surround the rods and form a packing about them. Also,

"I I prefer to provide annular pockets or recessesz37 inthe stuing block andv opening upon the openings 33 and 34, the pockets. I

associated with a given opening communi# eating with an outletichannel, 39, leading to the exterior of the block 32. In this way any extraneous material that may flow along a rod before reaching the washer 36 becomes deposited in the pockets 37 and drains therefrom through an outlet 39.' The stuffing block is conveniently held in position by pins 40 driven throughthe. block and adapted't-o enter corresponding openings in the, end of the casing 3, and by screws 41 also passing through the block andfenterso v ing the casing end.

'For conveniently and accurately mounting the lever 6, I drivethrough it an arbor or pivot 42, pointed at both ends 43, and seat these ends in' cupped pivot blocks 44 which closely fit recesses 45 in the supports andv have threaded Shanks 446 the threads. of,

which vloosely engage threads tapped in openings leading from the seats 45 to the 4 exteriorl of the supports in which such seats are formed, the pivot blocks being locked-in place by set nuts 47 upon the threaded'y Shanks. This provides for very accurate positioning of the relationship, as' t e parts are illustrated in Figure 8, but permits proper sliding of the .blocks toward 'and away from each other in order to engage the larbor 42 with sufficient forceto prevent looseness, the loose engagement of th'e 'threaded Shanks with lthe channel f threadsv preventing the threads from tending to interfere with the proper relaivot blocks 44 in vertical tionship between the heads 45 and their l seats.V One of these pivot bloc s is conveniently supported inthe rear wall of the casing'3, and I'pre-fer to support the other pivotl block in a detachable plate 48 'which as an-4 enlarged end ortion 49, in which the pivot block is received, and an extend Aing shank .50 which is received in a recess.

514 in the front of thel block portion- 13 of the casing and is positioned thereupon by pins 52 fastened in the shank 50 and enter- 'ing corresponding' recesses in the block portion 13 of the casing, said shank being secured in position by screws 53 passing through it and entering said block portlon.

By reason of thisconstruction easy access can be had yto the lever 6. 1 l

A cover plate 54 fits over the front of the casing and is removably secured thereto by lsuitablescrews' 55, and this plate has a h olpivotal mounting of the.

low protuberance 56 whose recess receives y the headed portion of the supporting late 48 with its vlock nut 47. Thus the wor ing parts" of the gauge are protected by the casing but access can be readily had thereto by removing the cover plate 54. To aid in excluding-dust, water and other extraneous matter from theinterior of the casing I prepivoted a central extension 59 of a handle 60. A spring 61 fastened to this extension'` 'and bear-ing against the adjacent end' face of the ,wall 12 of the casing serves to normally hold the handle in thegelevated posi'-l -tion shown in Figure 1 so that the finger 62 upon the lower part of the extension 59 isheld out of Contact with the end of the. rod 4 which projects through the rear of the casing, but by depressing the handle the linger 62 engages such projecting end of the rod 4 and serves as a retractor to move that rod and its connected gauffe-point 5in opposition"to the action of the spring 1 1, the inward movement of the linger 62 being preferably adjustably limited as by means of an adjustable stop 63 threaded through the finger 62 and secured in place by the set nut 64.v Thus, by depressing the handle so that the linger 62 engages and moves the rod 4 the operator can plush that rod asufiicient distance to carry t e gauge-point 5 out of therace-Way of the article being gbund and the gauge can then be easily moved away from the work, as for the removal of one iece of work and the insertion of another into the chuck C, and, the new work having been inserted( and the gauge swung back into gauging position, as soon as the handleV is released the gauge-point 5' will resume its position in contact with the work but the relief spring 61 carries the finger 62 away from the end of the rod 4 so that the rod is free to move without having to lit'the handle in such movement, thus making for sensitiveness of the gauge. The stop 63 makes it impossible to throw the gaugepoint-earrying-finger against jthe grinding wheel. As a convenient means of pivotally mounting the casing I provide thereon a plate 65 which extends from the rear of the easing and has centrally depending therefrom a `spindle 66, the platebeing rmly clamped between, on theone hand, a washer 67 which surrounds the spindle and abuts vagainst a shoulder 68 thereon, and, on the other hand, a nut 6 9 which is screwedupon the threaded, extending spindle end 70. This spindle'enters the opening of a cylindrical head 71 'uponrthe supporting, plate 2 and has a threaded lower endv 72 extending below such` I' head. .The oscillatory bearing is between the anale Lse and the deylinarial head v1,

and-f Jprefer to `make this bearing an antif friction one, as .by .driving 'cup members'7 3 v and '7456icup-andfcone?? .'b'allly bearings into thequpper andlower 'ends ofthe head and driving the co-actingpone members, 75 and A 7 6, of such bearingsnupo'nthecorresponding.

- preferably bent slightly Aso that when the stop pin 84 contacts with Athestop pin 85 the latter is received between portions'y of `the. spindle. Thus, the casing 3, carrylng the gauge-point 5, 1s supported very sensitively and is quite free to oscil- `late for the purposes above indicated. The spindle is conveniently locked against accidental separation from the head 71 by pro-l viding the -lower end 72 with lock nuts 77 which bear against a washerl 78 loosely `surrounding'such end and itself bearing against .the cone 76, while a cap 79, conveniently .threaded upon/the lowerv end of the head 71, covers the pro ecting end. 72 and 4forms a secure closure or the open 'lower end ot' the head. To guard against entrance of ex.- traneous matter at the upper end of the head I provide the plate 65 with a circular7 depending sklrt 80 which over-laps and fits about the upper end of the head, packing rings 81 of felt or the like being preferably provided between the head and the skirt, as by fitting in annular recesses 82 of the head and extending outwardly into contact with the inner face of the skirt.

I prefer to limit thev amount of oscillationof the casing 3 (outside of the extent necessary for 4gauging action), as by providing thecasing'with stop pins 83 and 84 adapted to cooperate Awith an intermediate stop pin 85 driven into and projecting upwardly from the support 2. In order, however, that, for reasons to be hereinafter ex- 'Y plained, the casing may, notwithstanding the stop pins, occupy various angular relat from the skirt and yet permit its ready application thereto and removalv therefrom when so desired, I let the stop pin .84 extend through the collar and project from the innerside thereof'into an annular groove 89 about the ,outer skirt, an entrance slot 90 extending at one point froml this groove to the lower edge of the skirt, as more particularly shown in Figures 11` and 12, To releasably khold the casing 3 in its outwardly swung' position A(away from the work), 'I fasten. one end of a leaf spring 103 tothe collar leaving its free end near the pin 84, this free end being inwardly as at 104,

the pin 84; and the inwardly bent end 104.a f- To enable my gauge '.to act upon different kinds ofwork Imount the'pivot-member 2 adjustably." That is to say, this pivot-member,-orl supporting plate, 2 is preferably pivarm 91 of the bracket 1, as by having a pivot stud 92, driventhrough the arm 91, received in a vertical opening 93 through vq the plate 2, a set nut 94 upon the upwardly extending threaded end 95 of the piyot stud 92 serving to hold the parts afrainst aci cidental separation, While a headed set screw 96, threaded into the bracket 1 and extend` sing, loosely through' a segmental slot 97 1n the plate 2, serves to lock the plate in its angularly adjusted position. I prefer also to-permit longitudinal adjustment of the bracket 1 upon its support, and this is conveniently provided for, vand the bracket is securely held in position, .by providing longitudinal slots 98 in the 'rearwardly extending base plate 99 of the bracket and a corresponding slot 100 in its forwardly extending base plate 101, headed set screws 162 loosely extending through these longitudinal slots and engaging t readed sockets in an appropriate portionofthe oscillatory head A. C l

lIt will thus be 'apparent that my gauge mechanism can be adjusted longitudinally upon the oscillatory head (b reason of the slots 98 and 100) so ',that t e gauge-point 5 can be carried toward or away fromithe chuck C;- the support 2 can be vangularly adjusted with respect to the bracket-'1; and the casing 3 can be angularly. adjusted with relation to the support2. These various adjustments en ablethe gauge to be` used upon surfaces of different character and yet permit the gauge-point to bear upon the surface being ground in the line of faceof a cup X, the ra the 'radius of the curvature ofl suchfsurface. For example, Figure 3 shows the parts ,in position to gau e the bearing suriusof whose lraceway extends from a cent/er substantially midwa between the sides of the cup. Shoul it be desired to rind a cup wider than the one shown in ingthe'E same character of race-way therein, .it would only be necessary to adj-ust 'A thebracket 1 longitudinall forward a suiiicient distance to bringt e gauge-point 5 into the new line of the center of the raceway.;A and ifvit be desired to grind a cup having a greater interior diameter than. the

`one illustrated in Figures 1 and 3 (because of which greater diameter the innersurface of the race-way mightylie a considerable dlstance to the left of the position occupied by the contact point 5 as e parts are shown 1n those two figures), thls ycan be provided for by adjusting the support 2 angularly in order to carr its forward end the required distance/'to t e left of the position it occupies in Figure 3 and also by jswinging the casing 3 angularly varound'it's ivotal axis together with an adjustment-o thei'collar 86A angularly about the 80 so that' notigure 3 but hav-L pivot-member 2 the gauge-point 45 can engage the work and travel in thef straight line which includes the pivot a and/the center fromwhich the arc b is struck. Furthermore, should it be desired to grind a `different character ofrace-way, such as the one upon the cup of Figure 4, such race.- wa havin its radius atan angle to the ra ius of lt e race-way sho'wn in Figure 3, this can be readily done by making any necessary adjustments of theA collar 86, the casing 3, the support 2, andthe bracket 1.

Should it be found desirable to prevent the oscillation mf the auge-point during gauging, as, possibly, w en gauging anarrow, straight surface, I can reverse the spring ID3-end for end by removing the fastenings and refastening the 'spring near vthe pin 84, and in. this way the stop pin 85 will be releasably held betweeny the. free end of the spring and the sto pin 83 and engage ldiametrically opposite that at which the rinding wheel E engages it, and, as the 0 Enger 29 and its 'supported gauge-point occupy but small space in that diameter, I

am enabledto employ a grinding wheel ofv -maximum diameter when using my gauge.

Thus, my present Ldevice is accurate, is compact,'can be readil bled, has its partsairm y held with respect -to eachother, has its moving parts well protected, can lbe manipulated by unskilled workmen, and can be used upon work of various sizes and characters. j

. In. the adaptation of' my gauge for out- 's1dework, as shown in Figures13-21, I provide a lpivot-plate 110 having near one end a downwardl ed-to be receivedy tomary plate A of the ordinary oscillatory head of ar grinding machine, this plate 110 having arcuate slots 112 concentric with thecircular boss 111 and adapted to loosely receivef headed set screws n113 which enter made and asseml extending boss 111 adapts in a socket ay of the cus- \threaded sockets inthe plate A', thereby flocking the plate upon the oscillator head but permitting angular adjustment t ereon.

And near the other end of thesupporting plate 110 I mount in ita spindle 114, substantially similar to the'splndle 66 heretofore described, while upon this I mount an i i oscillatory: cylindrical column llhaving a closure cap 116 and protected against in' gress of foreign, matter at its bottom by la'o washer-117, of felt or the like, itting about a circular boss 118 which is'Y upon the plate 110 land is over-lapped by the lower end of the cylindrical column 115, this washer being between the plate 110 and the lower edge of the cylindrical column. Extending from the oscillatory column is a bracket arm 154 upon which the casing 119 is mounted to be adjusted longitudinally of the arm, this being conveniently elfected by providin a central longitudinal rib 121- upon the ottom of the casin 119,- which rib is received in a longitu inalslot in such arm. This rib being provided `.with an elongated longitudinal slot 122 and the bracket :arm 1 54 having headed set screws 123 seated in threadedl sockets therein and extending through the slot 122, it will be readily apparent that the casing ca'n be adjusted to various longitudinal positions upon the bracket arm.

ing through it and seated for 'longitudinal sliding in bushin s ened portions of t e the casing and the ide-rod 126 is similarly slidbly seated 1n one end wall Iof the casing and is connected to the gauge-rod 124 the head-block 127 as heretofore ,ex-

b plained, But the gauge-point 128 is the projecting end of the gauge-rod 124 opposite to that upon whichv the head-block 127 these grinding machines lthe spindle G- is carried in supports secured to the oscillatory h ead plate A to move therewith. Prefer- 159 removably fits' upon the-extending casing boss 157 throughwhich the rod 124 asses, and abushing 158, of felt or the li e, surrounds-the rod and is con.-

ably a vcap lined in such cap, to prevent .the ingress of lever 129 v extraneous matter along the rod. Within the casing 119 is a mounted about as heretofore described and having adepending arm 130 extending into an elongated slot- 1310i the gauge-rod 124- while a more or lesslhorizontal arm 132 ofthe lever has the plunger 133 of the dialindicator resting upon it,- as ex lained in connection with the plunger 7 an the lever arm 19, the dial-indicator .134 being secured to a post 135 extending upwardly from the casing; I prefer to round theshoulder 136 ing parts heretofore described, and Iy conof the gauge-bar 124 against which the lever arm 130 bears, for the reason previously explained inl connection with the correspond- 4This casing has the gauge rod 124 extend-.-

125 received 1n thick. respective end `walls of i nect one end of the'tension yspring 137 to the lower end of the lever arm 13 0 and loop the other end of the sprmg overa stud 138- upon the casing. Thus, the spring tends to hold the gauge-point 128 in contact with its work,"the gauge-bar 124 movingforwardly and the lever arm 132 thereby moving upwardly as the grinding thatthe indicator 134 shows the grinding. i

The pivot blocks 139 (substantially as heretofore described) are .supported respec.

tivelyginthe rear wall14( );of,the Casin and the separable plate 141although I pre er. to directly `supportone 'of` 'these pivot blocks in a bushing 142 extending through a thickprogresses, so the' extent of enedportion '143 of the* rear wall of the ca'sin and having at its inner end a periph;V v

eral ange 144 Which-engages the inner face plate 151.v

As a convenient means of withdrawing the gauge-rod 124 and holding itin withdrawn position,y piece 152 which` has astqm tending through the screwed into a crosspie The enlarged head 149- I; provide'a milled .ingerJ 15.3 rotatably eX- V y 4 had-block 127 and 100 155 upon the in-.,.

ner side of the head-block 127, this crosspriece having ngers 156 extending inwardly 1 om its ends and. such a distance from eac other that the boss '157 Vof-the adjacent end ofthe casingv 119 can' be received between these fingers when the parts are in the position. indicated in Figures 14 and 15 and the gauge-point'128 is thus in extended ppsition for engagement withlthe work.- `y

graspin .thevfinger piece 152 andl pulling outwar y,the gauge-rod, 124 is withdrawn from its op'eratlve position and the -ingers 156 are carried to a point clear yof 'theend face 'of the boss 157 2 and bythen-slightly turning the finger plece 152 (and its connected cross-plate 155) the fingers 156 are.'

brought opposite to the end face o ff the boss 15.7 so that when the finger iece`152 isreleased by the operator these ngers 156 will fengag'e the end face of the bossandwill thus support position. y

From the description heretofore given 'of lthe operation of the form of myinvention the gauge-rod '124. in linoperative first herein described, the operation ofthis embodiment adapted to outsidel work will be readilyvapparent. 1 note, however, that the various adjustments heretoforedescribed in connection with this second embodiment leo of the Work opposite to that upon which the` bearing point 128 (or n) bears, while the curved race-way of the bearing-cone Y defines an arc having its center uponv the side of the work opposite to that upon which the center of oscillation (m),is located there isno danger of the bearingpointv 128 slipping out of the race-way (and, therefore, `oif the work) during the oscillation occurrin while the work is being ground.

claim:

1. In apparatus for automatically gauging a concave' curve, a movable carrier, a gauge point mounted to movefreely with the carrier substantially in the direction of the length of the curve, and a guide on the carrier to allow thegauge point tonmove also in a line normal to said curve and intersecting the line of the first mentioned movement; substantially asv described.

2. In an apparatus for automatically gauging a concave curve a' gauge point mounted to move freel su stantially in the direction of the lengt lof the curve, and me'ans for urging said gauge point'in a line normal to said ,curve to hold the gauge point i against said curve.

3. In apparatus for gauging a Aconcave surface, a pivoted gauge carrier havin its pivotal axis lying on a line substantially normal to said surface, and a lgauge member slidably mounted on s 'd gauge carrier to-'move towards said pi tal axis to .contact with said surface.

4. In apparatus for gauging a concave curve, a gauge member mounted t0 move freely in a direction to cross'the radius from of said radius to against said curve.

which said curve is struck, and means conf stantly urging the gauge member in theline press the 'gauge .member 5. In apparatus for gaugingthe deepest point in a concave surface, a gauge member mounted to swing freely about an axis lying on ya line which is substantially.' normal to l said surface and constructed and arranged toy movealso toward 'said axis, means constant- 1y urging said gauge towards said axis to, Aengage said deepest'point, and means for` confining. said last mentioned movement to an unvarying path.

6; In agauge, a `base-aording member,

af carrier .in operative connection therewith,

and a gauge-point 'carried by said 'carriei` and movable thereon to vary its` distance from said ,base-affording member, said carrier being freely movable relativelyv to the base-affording member in a line intersecting and normal to the path of said movement of said gauge-point; substantially as' described.

7. In a gauge, `a base affording member, an elongated carrier having a lateral exten sion pivoted to said member, a b ar slidable in said carrier, and-a gauge finger `extending laterally from said bar. -v y 8. In a gauge,`a pivot-member, a carrier' pivoted thereto to freely oscillate, guides on said. carrier, a bar' slidable in said guides upon said carrier, a gauge-point carried by said bar, said bar being slidable in a line intersecting the path of the above-mentioned *oscillation the axis of oscillation and the gauge point both being at one side of the a gauge linger extendin llaterally from said f bar, indicating mechanism mountedin the carrier, and a connection 'between said indicating mechanism and saidfbar controlled by said gauge finger. t

10. In a gauge, Ya pivot-member, a carrier pivoted thereto to freely oscillate, the axis of the pivot being substantiallyr perpendicular to the plane in which the said carrier oscillates, uides on the carrier, a bar slidable in sai guides upon said carrier to vary itsdistance fnom such pivot, a gaiigepoint carried by said bar, and means upon said 4carrier constantly urging saidbar in its'line of movement to press the gauge point againstthe work; substantially as described.

11. In a gauge, a pivot-member, a hori-` zontally elongated carrier vertically ivoted to said ivot-member to freelyoscillata a ^bar freeli;7 slidableupon said carrier in the direction of its length, andl a 'gauge-point carriedl by saidV bar; .substantially as described.

12. In a gauge, abase-affording member, a carrier pivotally connected therewith, a gauge-point-car e ing member movably supported upon sai carrier, andmeans for adjustably securing said base-affording m'cm-v ber in positionto vary the position of such pivot; substantially asv described.-

13. In a gauge, a support, a pivot-member 4pivotally supported thereon to swing in a substantially horizontal'plane, an elongated carrier pivotally supported lupon said pivotmember to swing in a substantially horizontal plane, 'and aggauge-point-carrying mein- 1 25 rection of the length of said carrier; subv stantia/lly as described.

14. In a gauge, a support, means for adjustably securing the saine in differentposiport to swing in a substantially horizontal plane, a carrier pivotally supported upon said pivot-member to swing in a substantially horizontal plane, and a gauge-pointcarrying member movably supported by said carrier `to permit said gauge-point to move in the direction of the length of said car-` rier;` substantially as described.

15. In a gauge, a carrier havlng a pivotal axis at one side, a gauge-pointfcarrying member movably supported upon saidv carrier to move to vary its dlstance from the.

pivot point of-said carrier, and a gauge-point at one side of .said gauge-point-carrying i member and separated from said pivot point toepermit the work to lie between them; substantially as described. i v

16. In a gauge, a base-.al'ordin Imember, a ,carrier pivotally supported t Jereon to freely oscillate, a gauge-point-carrying member movably supported upon said carrier to moveto var its distance from the pivot point 'of sai carrier, a gauge-point upon said gauge-point-carrymg member. and separated from said pivot point to permit the work to lie betweenthem, and means constantly urging said gauge-point toward said pivot-point to press agmstthe work; substantially as described.

- 17. In a gauge, a support,;af'gau e-barl Vslidable thereon, a guide-bar also slidable, upon said support` a connection between said` bars and a gauge finger at the middle of the connection; substantially as described.

18. In a gauge, a support, a gauUe-bar slidable thereon, a guide-bar also slldable thereon, a head-block connecting said bars, a finger extendin from said block and a gaugepoint carrie by said linger; substan- 19. In a gauge, a support having bearings, a gauge-bar slidable in one of said bearings and having a gauge-point in connection withsaid bar, a guide-bar also slidable inanother point in connection with such of said bearings, and a headblock having sockets receiving said bars, the portion of one of said bars received in its said socket being eccentricto the portion of said bar in its said bearing; substantially as described.'

20. In a gauge, a casing, a gauge-bar slidably supported in opposite walls thereof and projecting therefrom .and having a gaugepoint in connection Awith such projecting portion, a lever for moving said bar and a cooperative movable element Within said casing vand in operative connection with sa-id bar; substantially as described.

21. In a gauge, a casing, a gau e-bar slidably supported in opposite walls t ereof and' projecting vtherefrom and having' a gaugerejecting portiona spring for moving said bar in one direction, a lever for moving the gauge bar against the tension of the spring, an indicator supported by said casing, ,andoperative connecting mechanism, in said casing, between said bar and said indicator; substantially as described.

22. In a gau e, a casing, a gauge-bar slidably supporte in a wall thereof and projecting therefrom, an indicator supported upon said casing an-d having a longitudinally slidable stem entering the same, and a lever in said casing having one arm engaging said bar and its other arm abutting against the end of said stem.; substantially as de' scribed. 1

23'. In a gauge, avcasing having Ia. bearing opening, a bar slidably mounted in the o enf ing and' projecting therefrom, a pac ing about said bar, and a stuiiingblock about said bar and engaging said 'packing and having a drain channel leading from its opening which receives said bar; substantially as dev 24. In a gauge, a support, a gauge-pointcarrying member movably supported there# on, means urging said point toward gauging position, a movable retractor'adapted to.

engage said gauge-point-carrying member and move it 1n opposition to said urging` sa id means, and means ,for normally holdingv stanretractor out of such engagement; su tiallyy as described. v Y o 25.'I11 a gauge, a support,a gauge-pointcarrying member movably. supported thereand yieldable -means urgingB said retractor out of such engagement; substantially as de scribed. l.

Q6.v In a gauge, a swinging carrier, a gauge-point-carrying member carried thereby and movable with respec't thereto, means urging said point toward gauging position, and a lever pivotally supported upon sald carrier and having an arm adapted to engage said gauge-point-carrying member and move it in opposition to said urging means. 27. In a gauge, a swinging carrier, a gauge-point-carrying member carried -thereby and movable with respect thereto, means. urging said point toward gauging position, a handlemovably supported upon said carrier and having a. portion adapted to engage said gauge-point-carrying member and move it in opposition to said urging means, and means for yieldingly holding said handle out Aof such engagement; substantially as de- Iscribed..

' tion of saidbar and having a portion the other projectin porto move the same; su stantially as' described. v 29. In a gauge, a supporting-member having an tinning therein, a carrier movably suppor upon said supporting-member and having a vpart extending'across said opening, a skirt extending from said carrierand about said supporting-member, mem rs in said opening connecting said carrier and said sup orti-n -member, and gauging means carried y sai carrier; substantially as described. 30. In a gauge, a casmg ber therein and also having a block portion provided with a recess in its front face, 'a gauge-bar extending through said block portion, a pivoted operating part 'in said recess and provided with a'pivot having one end seated on said casing, the other end of said pivot is seated and u on said casing a apted to engage i having a portion in said recess and secured U block and extending movement t erebetween,

i casing;

to said block "portion, and a cover for said substantially as described.

31. In a gauge, a su porting-member having an opening theret rough, a pivot-block itted in said opening and movable longitudinally thereof, a threaded shank upon said loosely throu h said opening, and a nut upon said sha substantia 1 as described.

32. In a auge, two parts having relative movement terebetween, a collar adjustably surrounding one of said parts, a stop upon the other part, and a cooperating stop upon said collar; substantially as described.

33. In a auge, two parts having relative one of said parts being rovided with a groove, a stop-carrier movab e upon said grooved part, a stop pin through said carrier and projecting upon both sides thereof, one of such projecting portions entering said cove, and a cooperatin stop for said pin; substantially as descri ed.

34. In a gauge, a sulport provided with a stop, a carrier pivota ymounted uion said support, a collar adjustably secure -to said carrier, and stops upon said collar and coo erating with said first mentioned stop; su stantially as described.

35. In a gauge a supporting-member havmg an opening t erein and provided with a stop, a carrier pivotally supported upon said sup orting-member and having a part yexten ing across said open' g, a skirt extending fromsaid carrier-part and about said having a chama plate on which 4'carriedby the .work holder ,around an axis to carry .to contact with'. the surface of a supporting-member, members in said opening connecting said carrier and said supporting member, a collar adjustably secured aboutsaid skirt, and stops upon said collar cooperating with said first-mentioned stop; substantially as described.

36. In a gauge for measuring inside diameters, in combination, a reducing tool arranged to contactwith the inside surface of the work, a slidable gauge member arranged to contact with the work at a point diametrically opposite the point at which the tool contacts with the work, a swingin for the ga'uge member, and means or constantly urging the-gauge -member to slide in a direction normal to the surface of the work during the reducing operation.

37. In apparatus of the class described, in combination, a reducing tool arranged to contact with the inside surface of a piece of work, a work holder mounted to traverse the work across the tool, and a gauge member and engaging the inside surface of the work during the reducin operation.

38. n apparatus of the class described, in combination, a reducing tool arranged to contact with the inside surface of a piece of work, a work holder mounted to oscillate the work past the tool in a path to produce a concave surface, and' a gauge member carried by the workv holder and continually engaging the inside surface of the work during 'the reducing operation.

39. In apparatus of the class described, in combination, a rotary reducing tool arranged to contact with the surface of a ring, a work holder mounted to swing around an axis to traverse the ring past the tool in a path to produce a concave raceway, and a gauge member carried by the work holder and being free to swing thereon to find the deepestpoint in said raceway.

40. In apparatus of the class described, in combination, a rotary reducing tool arranged ring, a wor holder mounted to swing around an axis to traverse the ring past the tool in apath to 'produce a concaveraceway, a gauge member carried by the work holder and bein free to swingl thereon to nd the deepest point in said raceway, and means for constantly moving the gauge member in a path normal to said raceway to said deepest point.

In testimony whereof hereunto aii'ix my signature.

' GEORGE G. BUSH.

lguide

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