USRE16196E - A cobpobation - Google Patents

Description

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' J. BATH GRINDING MACHINE original Filed June s, 1912 9 sheets-Sheet s Nov. 3,1925. Re. 16,i6

K J. BATH n GRINDING' MACHINE l'omging Fifled Junes, 1912 9 sheets-sheet 9 130 132 77 17.9 176 175" 175 I aal-Wm.'

Reiued Nov. 3, 1925.

cHUsET'rs.

To all 'whom t may concern.-

Be it known that I, JOHN BATH, a citizen of the Unit-ed States, residing at Worcester, county of Worcester, State of Massachusetts, have invented a new and useful Grinding Machine, of which the following is a specification.

This invention relates to grinding ma chinery, particularly tp machines of that class designed to grind external surfaces of revolution.

The object of the invention is to produce a. machine for this purpose having certain im rovements and refinements hereinafter fu y explained and claimed by which to obtain more accurate results than heretofore in certain particulars, and to carry out the operations on the work piece in a more ethcient anda better manner. l

In the drawings accompanying this application, I have illustrated a form of the machine in which the principles of my invention are embodied, the same containing the preferredform, though not necessarily the only one, *of this invention.

In these drawings, Figure -1 is a Aelevation of the machine referred to.

Fig. 2 is a rear elevation of the same. dFig. 3 is an elevation of the left hand en gig. 4 is an elevation of the right hand en Fig. 5 is a lan view, the inding wheel being remove and the grin ng wheel post or support being shown in horizontal section.

` Fig. 6 is a plan view of the cross feed front slide of the machine and the mechanism for operating the "moving parts, the work-carrying slide being removed, and part of the base of the machine being shown in plan. y' Fig. 7 is a sectional view of the cross feed operatin mechanism.

Fig. 8 is a ront elevation of the same.o

Fig. 8* is a perspective view of the same mechanism."

Fig. 9l is a cross section of the foot stock jand sliding swivel table on line 9-9 of Fig. 10 is a longitudinal section enlarged of the `mechanism for reciprocating the swivel table.

l Re. 16,196

lUNrrED STATES PATENT, OFFICE.

- JOHN BATH, OF WORCESTER, MASSACHUSETTS, ASSGNOR TO JOITN BATH & COMPANY,

INCORPORATED, OF WORCESTER, MASSACHUSETTS, A

CORPORATION 0F MASSA- HummmI MACHINE.

i Original R0. 1,202,018, dated October 24, 1916, Serial No. 701,754, filled June 5, 1912. Application for reissue led lay 25, 1925. vSerial No. 32,854.

Fig. 11 is a cross section on line 11-11 of' FigjlO. ig. 12 is a cross section on of Fig. 10.

Fig. 13 is a perspective view of a cylindrical shell forming part of the mechanism shown in Fig. 10.

Fig. 14 is a plan view of` a templet or logging element.

Fig. 15 is an elevation partly in section on line 15.15 of Fig. 6.

Fig. 16 is a cross section on line 16-16 of Fig. 6. l

Fig. 17 is an enlargement of the parts shown in Fig. '15.

une 12412 Fig. 18 is a cross section on line.18-18 of y Fig. 6.

Fig. 19 isla plan view of a slide showing the means of ad]usting swivel table and means for carrying away the water.

Fig. 2O is a longitudinal section ofthe foot stock showing the means for adjusting the dead center.

Fig. 21 is a cross section onl part of the a larger scale y of one of the intermediate work rests.

Fig. 22 is a front elevation of the same. Fig. 23 is a side elevation of the same.

v Fig. 24 is a rear elevation of one of the water shields. Fig. 25 is a erspective view of one end ofthe swivel tab e showing the means which I have devised for displosing of the water.

Like reference c same parts in all the figures.

I will first describe the constructions illustrated in the drawings .and then explain the principle embodied in suchconstructions and the advantages thereof.

First referring 1 to6 inclusive, seen to a box like structure 1, plan of which the L or rearwardly extending part 2 rises somewhat above the main portion as a hollow column and supports a bracket 3 carrying the bearings 4 in which are mounted the spindle of the grinding wheel 5,. Such grinding wheel is partly covered and guarded by the case 6 secured to the bracket 3 and partially surroundingthe wheel. The forward part of the machine has transversely extending guide ways 7 and L-shaped in thel aracters indicate the rg (Eig 1,) on which is mounted a cross feed a manner which will The latter has longitudinal guide ways V10 and 11 (Fig. 9) extending perpendicularly. of the cross feed guide ways, and termed longitudinal because they extend in the direction in which the work is carried back and forth acrossfthe grinding wheel. The guide way 10 is V- shaped and the guide way 1l is flat, the former receiving a downwardly projecting- V- shaped rib 12 on the under side of a longicarriage 9.

tudinal reciprocating slide 13 and the latter"- flat portion of the under contacting with a side of the slide. .Such slide mayalso be termed a bed or a work carrier,` since its function is to carry the head stock 14 (Fig. 1) and the foot stock 15 having, respectively, the live center 16 and the dead center 17 engaged with the ends of the work. Both the head and foot stocks are adjustably mounted on a swivel table connected at its center with the slide 13, by means of a pivot stud 19 shown in Fig. 19. The slide 13 contains a channel 20 in which is held a screw 21 rotatable but otherwise.

immovable, passing through a nut 22 and having a head 23 at the front of the slide for manual actuation. The nut is adapted to travel along the channel 20 and carries a stud or roll 24 contained in a notch 25 in one end of the swivel table (Fig. 9). Rotation of the screw swings the swivel table in be readily understood, to enable tapered work pieces to be ground. One or both ends of the swivel table has a projection 26 (Figs. 5 and v25) bearing the index' mark 27 which in conjunction with a graduated scale on the adjacent part of the slide or bed shows the amount of deviation of the axis of the work from the line of travel.

The head and foot stocks are in the main 'of conventional design, each having a groove to receive an upstanding V-shaped rib 28 extending the length of the swivel table, shown in Fig. 9, and having also a bearing surface 29 adapted to rest on a complementa] plane surface 30 extending along the swivel table at the opposite edge thereof from the rib. The head stock has rotatably mounted upon it a pulley 31 (Fig. 2) which drives, through gearing not shown. a spindle carrying the face plate 32 and the live center 16. Such face plate also carries a pin or dog 33 as usual for rotating the work.

A cross section of the foot stock is shown in Fig. 9 and a longitudinal section thereof in Fig. 20 (Sheet 1). The center 17 is secured, in the usual manner, in a tube or quill 34 whiohslides longitudinallyin a socket 35 and is prevented from rotating by a key or tongue 36 entering a groove 37., An adjusting screw 38 has a bearing at 39 at one end of the foot stock and engages a nut 40 secured in the quill. It is rotated in the usual 18 pivotally yof the disks,

' my invention but is Halse `Ina-finer by a hand wheel 41. A novel fea-- ture of the -foot stock is that the screw is not held against endwise movement in both directions. The means which normally holds the dead center up to the work is a spring 42 which thus takes the thrust of the work yieldingly rather than positively, and thereby insures against too great friction between the work-anddead center. A means, however, is provided for=preventing the outward movement of the vscrew 38. that is, to the right "with respect to Figs. 1 and 20. This means is a set screw 43 which is so arranged as [to-be capable of compressing a washeror plug 44 of lead against theshank of.the screw and thereby holding the same with any desired degree of friction. They foot stock is securedin any position of adjustment on the swivel table by means of abolt 45 (Fig. 9) having a head 46 contained in a T slot or under cut groove 47 extending longitudinally of the table, such bolt being tightened by a nut 48 as shown clearly in Fig. 9. A similar means ofwhich only thev nut 48 is shown in the dra-wings is used for' clamping the head stock."

The motor mechanism by which the slide is reciprocated to carry the work back and forth past the grinding wheel consists of the following. A' drive shaft 49 (Fig. 2) is driven by a belt 50 passing around a pulleyY 51 on such shaft. Said shaft carries a bevel gear 52 which meshes with a gear 53 on the side of a friction disk 54. This disk rotates about a stationary shaft 55 suitably supported by brackets on one end of the machines base. Also rotatably mounted on thev same shaft are a friction disk 56, (Fig. 3) and a toothed drum or gear 57 whichl are rigidly connected together. The disks 54, 56 are somewhat separated and on their adjacent faces are annular conca-ve grooves in which are contained wheels. or rolls 58 making contact with both disks for transmitting motion from one to the other.. These rolls are adapted to oscillate about axes perpendicular to their own axes and also to the axes tact with the disks may tively, toward the center of one disk and toward the periphery of the other disk at the same time, whereby to vary the speed of the . disk 56, 54 being driven at a uniform rate.

This particular driving mechanism is not described in a patent issued yto-Hemy H. Cummings, therefore I Vdo not explain it in particular detail. A feature of this mechanism. which is, however, novel with me .is that the shaft 55 is fixed and stationary while the disks tating rolls 58 being pivotally supported upon brackets secured to the shaft. This condition enables the ball thrust bearingof the disk 54 to be taken up by lock nuts` 59 whereby their points of con-` be shifted, respecand the gearv 57 rotate around it, the oscillating and rois on the shaft with a worm wheel 77. The latter is on aV 'respectively opposite sides of the shaft `55,

and to one of them is connected an upright shaft 60 (Fig. 3) by which the described oscillative movement is given. The other roll is operated by said shaft through gear segments whereby the two rolls are eually and oppositely shifted. On the shaft 60 there is `connected an arm 61 having a pivot coupling with a link 62 which passes from one side of the base to the other and at its other end (see Fig. 4) carries a collar 63 connected pivctally by a short link 64 with an arm 65 on an operating shaft 66. The latter runs'upward beside the base to the top of the bracket 3, where it passes through a plate 67 and carries a handle 68 pivoted to it at 69 above said plate. The handle may be turned in one direction or the otherto shift the speed rolls through the connections described, and is retained in any position by. a latch pin 70 carried upon a rearwardly projecting arm 71 and adapted to be set into any one of a number of holes in the disk 67. y

Gear 57 (Fig. 3) is longer than the amount of travel of the cross feed carriage 9 and extends in the direction of this travel. It meshes with the first' of a train of gears 72, 73, 74, and 75, `carried by an arm 76 which is secured to the cross ifeed carriagel 9. Gear V72 may slide along, while remainingin mesh with the long gear or drum 57, and thus driving of the longitudinal Work feed (by the mechanism presently to be described) is" made possible in all positions, of the carriage 9. The last'gear 75 of the train of a Worm '76 which meshes shaft which passes throu h a transverse bearing 78 (see Fig. 6) an carries a bevel gear 79 meshing with complemental bevel gears 80 and 81. The latter are pivoted looselyupon a tubular shaft 82, for illust-ration of'which reference may be had to Figs. 10 and 16, and therefore turn in respectively opposite directions when the driving mech- 8'1 carry clutch members 83 and 84,'respectively, on their ends nearest to one another, and between these clutch elements is a double clutch sleeve 85 having teeth on both.

anism is in operation. These gears 80 'and element 83er the clutch 84. Thus either gear 80 or' 81'may drive the tubular shaft. The vmotion of this shaft is transmitted to the slide 13 bynieans of a pinion 90 driven by the shaft and.connecting with a rack 91 (Fig.` 16) on the underside of the slide. Said pinion 90 is loose on the tubular shaft but is connected thereto with provision for a certain amount of rotative lost motion by means of a cylindrical shell 92 (Fig. 10) securedto' a flange 93 on the shaft and surrounding the hub 94 of the gear. Said hub Carries a stud 95 contained in a slot 96 of the shell 92. The reversalsof theshaft and shell 92 cause the pinion to drive the slide back and forth and at each reversal the lost motion allows the slide to remain stationary for af period before it too returns. pause is designed to be long enough to allow the work piece to make o-ne complete rotation while the grindingwheel is at the end of the part upon which it is acting. is a valuable feature as it enables the extreme endsl of the work to be ground true and thus adds greatly to the accuracy of the machine. The amount of lost motion may be varied to accommodate -Work pieces yof different circumferential extents and to this end the shell 92 has several slots 96 of varying lengths into any one of which the stud 95v may be set, this stud being detachable for the' urpose substantially as shown.

T e rod 89 which shifts the clutch 85 may be operated first in one direction and then in the other either automatically or by hand. They automatic mechanism includes a lever 97 (see Figs. G, 15, and 17) pivoted upony a'shaft 98 in a box" 99 on the front of the cross feed slide. This lever carries a roll 100 (Fig. 17 contained in a notch 101 ina bar 102 hich is adapted to slide endwise in a .guide 103 formed Within the box having a removable cover 104. The bar 102 is also provided with another notch 105 in which is containeda roll 106 on one arm of a bell crank lever 107 the other arm of which is forked and has two .prongs 108 straddling the rod 89 and carrying rolls 109 contained between collars 110 on said rod.

The rolls 109 are journaled upon studs 111 whichl are contained in Sockets within the prongs 108, such sockets being split at one side and being closed upon the studs by clamp screws 112.

A novel feature of this mechanism consists in the inode in which the bell crankv 107 lis mounted, it being swiveled upon a stud 113 (Fig. 16) hanging from a bracket 114 at the rear side of the box 99. When Ithe lever 97 is oscillated from one side to last described proendwise movement shifting the clutch dogs for thus shiftbeing shown at 115 the other, the mechanism duces a corresponding of the rod 89, thereby 85. The slide 13 carries ing lever- 97, such dogs This This

and 116 (Fig. 1) and being conveniently pins screwed through holders 117 which are hung by pivot'screws 118 (Fig. 23) to blocks 119 adjustably secured by clamp bolts 120 having heads entering an undercut longitudinal groove121 in the forward edge ot' the slide. Then in theirlnornial posit-ion the dogs travel in a path which contains the lever 97 and they are thus enabled to strike and swing said lever in one direction or the other according as the slide is traveling. lVhen the bar 102 is thusmoved by this swing of the lever a V-shaped projection '122 (Fig. 17) on its under side travels over longitudinal mg gear. At the conclusion of a roll 123 carried by a plunger 124, depressing such plunger against the resistance of a spring 125. lVhen the point of the projection passes over the roll the spring causes pressure to be applied to an inclined side of the projection causing the bar 102 yto complete its movement. I term this projection a V-faced cam on account of the function which it performs as described. Connection of the reversing clutch after disconnection of the clutch which was previously acting is j insured by this V-cam in connection with a certain amountof lost motion provided between the Walls ofthe notch 105 and the roll 106. The travel of the Abar105 is greater than the total throw of the clutch 85 and the extent of one face of the V-cam 1s about equal to this throw, while the lostmotion is 'approximately the same amount. Hence the disconnection of the previously acting clutch is not completed until the point of the V-cam passes the center. Hence even though the slide'should stop at this point, the plunger acting on the side of the V will continue the movement of the clutch 85 until the same is coupled with the reverse drivthis movement of the bar in either direction the excess space in the notch 105 is entirely on that side of the roll 106 which is to be acted upon on the next throw of the bar. A novel feature is provided in connection with the mounting of the plunger 124. (Fig. 17.) The same is contained 1n a sleeve 126 projecting from the bottom of the box 99. It passes through a plug 127 having a flange 128 overlapping the end of the sleeve 126 and heldin place by screws 129. The shank of the plunger carries a key 130 contained in a groove in the plug to prevent the plung` er face of the roll 123 square with the V cam.

The means for manually operating the clutch consists of a lever 131 (Figs. 16 and 18) pivoted to a pin 132 contained in an offset 133 of the detachable front wall or cover 134 (Fig. 6) ofthe box 99 containing the reverse mechanism. Said lever passes through a slot 135 (Fig. 16) in the cover 136 of this box and has a handle on its outer end.

On its lower end beneaththe pivot is a. fork Ythreaded whereby said collars.

from turning and thereby to keep the posite sides of the rod 89 between collars 139 thereon.

The portion of the rod 89 which carries the collars 110 and 139 is which arel made as nuts lit'ted into the threads of the rod, may be adjusted. The collars are split and are provided withu'hich they may be set immovably in their respective positions. By so adjusting the collars. tbe levers 97 and 131 ma)v be brought into cert-ain desired positions when the clutch 85 is in the neutral position. A novel device for automaticallyY arresting the clutch in neutral position and so stopping the travel of the slide is provided in a latch 140 Fig. 16) pivoted to a bracket 141 on the cover 136. This latch has a notch 142 adapted to receive a pin 143 on the side of the lever 131. In the construction shown, the notch is formed between two lugs onthe under side of the latch lever. and the outer faces of such lugs are cam shaped so that the pin will pass under' them and dis lace the lever until the notch is reached. 8rdinarily the latch 'lever is thrown back out of the way, but when the operator desires to stop the machine at the end of the next cut, he swings it down allowing it to reston the pin 143.V On the next reversal of the clutch mechanism when the lever 131 has reached the position Where the notch may receive the pin such lever is locked and the clutch is held in neutral position. A valuable feature of this device is that the latch is gravity operated. to stop the trip motion and needs no springs for the purpose.

. The dog-operated trip 97 )asses through a slot in the box cover l136 (Big. 5) and lies back of a rib 144 projecting upward from the cover beside such slot. This. rib rises to the yheight of the end of the trip lever and extends beyond each vlimit of movement thereof.l It is provided for the triple purpose of concealing the lever, of clamping the same, and of serving in conjunction therewith as an index or gage for shoulder work when the slide is *operated by hand. The manner in which it accomplishes the first purpose is obvious. The second purpose is accomplished b v a screw 145 shown in Fig.

lois

L 16,196 a. n u

When the work to be groundA is shouldered porting the work between the ends thereof, and the dogs V115 and 116 have been set to one' of which rests is shown lin Figs. 21, 22, correspond with these shoulders, they coand 23. It consists of a casing 167 having act with the lever 97 'to stop the motion when a claw 168 (Fig. 21) adapted to enter an I the `shoulder has beenlfed up to the grinding undercut channel 169 at one side of the T 70 wheel. Stop screws 1482 ig. 15) are proslot 47, previously mentioned. It also has a vided on both `sides of the lever 97 to limit detachable clamp 17 0 with a rounded toe 171 the throw thereof within the etremities of entering a groove in the outer face of the lthe shield 144 and are adjustableto secuie swivel table at the fate of the longitudinal l this end with exactness They are placed V rib"28. This clamp is secured bya screw 75 at a low point relatively to the pivot of the 172. Shoes 173 and 174 are provided for lever so that-,the noise occasioned by the Supporting the work, the former bearing lever sti'ikinglthem will he deadened as much against the front side and the latter against as ossible. 4 3 Y j the under side. The shoe 173 is secured by e cross feed byl means of which thev a screw 175 to a slide 176 which travels 80 workis caused tov approach and recede from vhorizontally inl the casing and is retained by the grinding wheel is accomplished by a acover plate 177 which has a front wall 178 handxwheel 149 (Figs. 6 and 7) secured upon containing a bearing for the adjusting screw a cross screw 150 which-is held in a flange 179. vThe latter is threaded into the slide bearing 151 between the two ball thrust bearand projects through thewall 178, having 35 ings 152, 153 held in the front wall of the -a collar 180 and a knob 181 fastened upon box 99. The cross screw is threaded through it outside of the wall, and a collar 182 witha nut 154 clamped to the top of the base 1. in the wall. The bottom shoe is carried by Between the hand wheel and the bearing 153 an arm 183, pvoted t0 the casing by a. pin j I have mounted on the cross screw a num- 184, having a Shoulder 185, An interme- 90 ber ofcollars 154, as man)T aS desired inde. diate lever 186 bears against the shoulder pendently keyed on the screw, each of which and is pressed upon by a slide 187 engaged forms a bearing for a stop finger 155 (Flg by a similar screw 188 having a knob 189` 8) independent of one another. Each Stop and an index collar 190.

finger cooperates with a stop awl 156 Fig. 21 shows clearly the manner in which 95 mounted plvOtally 1119011 a Stud l5 PIOlCtrotation of the screws 179 and 188 may adingv from a wing 158 which risesy from Jthe just the shoes to any relation with the work. flange of the bearing 151. EaehA 0f the StOP K The reason for providing a slide 187 instead pawls is adapted t0 Swing Out of the v vy 0f of having the screw 188 bearingvdirectly on the corresponding finger, but when 111 the the lever 186 is that theE same direction of 1 00 path of the finger it iS held rigidly by a prO- rotation of both knobs may have correspondject-ing lug 159 which rests againsta st em ing effects on both shoes. The lever 186 is 160 projectin from the arm 158 and having provided in order to give a more rigid abuta face 161. rhen swung out of the way, the ment for the arm which carries the shoe 174 stop pawl is Supported by a V Shoulder 162 than would be provided if the slide 187 were 105 in the position illustrated by the pawi 156 extended far enough to bear directly on the in Fig. 8. As many of the COOPeItlng StOP i arm 183 and the lever 186 were omitted.

fingers and pawls can be lprovided aS may be It will be noted that the shoe 173 bears onv desired. They Serve t0 arrest the CIGSS feed the work 0n the side opposite to that engaged at various points in duplicating pieces havby the inding wheel, whereby the defiee- 110 ing anumber-of diameters t0 be IggrOllnd t0 tion of e work due to pressure of the wheel l given sizesy or for varying diameters of is overcome, and that the shoe -174 supports roughing. and finishing cuts. The fingers the work against deilectionfduev to its weight may be adjusted into any angular position and to thedownward thrust occasioned by j to suit the work' and to this end each 1S the friction of the grinding wheel.v There 115 mounted upon a, ring 163 which Surrounds may be as many 0f these, rests as the length one of the collars 154l and is adapted to be and flexibility of the work piece requires,

tightened thereon by a clamp screw 164. three of them being shown in Figs. 1 5,

After the finger which is most advanced has and they maybe adjusted .to any points served its purpose, the cooperating stop pawl where their presence is required. 120

is swuno` out of `the way, leaving the next The formation of the swivel table as above one rea to do Vits work. Secured tothe described, with the grooves 169 and 171|, hub oft e hand wheel is a disk 165 (Fig. is a feature of great importance, as it en- 6) having a graduated scale on its periphery ables the rests tol be applied and removed near which lies a finger `166 (Fig. 8) on the with the utmost ease without necessitating 125 end of the stem 160. This scale and index` removal of the work from the centers or in cooperation serve to denote the amount shifting of the head stocker the foot stock.

of stock removed, and to correct the adjust- Between the head and foot stocks and the ment of the stops 155. Y rests, I provide shields to catch the water I have provided an improved rest for sup.- with which the grinding wheel and work 119 are deluged. `One of such shields holes y 206 secured is illustrated in detail in Figs. 23 and 24. It is made of a sheet or plate 192, preferably of a thiclmess approximating that of sheet iron, or at any rate relatively very thin, having a cylindrical curvature and provided vwith a foot or lug 193 adapted to enter the-T- Slot 147 in the swivel table whereby to sup-J port and position the sheet. These shields are of stand ard length and as the spaces between the various parts mentioned. Where two or more are required in one space theirslight thickness enables them to be overlapped at the edges. `Preferably also the casings of the rests have curved ribs 194 (Fig.` 23) to underlie the adjacent ends of the shield. These shields prevent the water from s attering beyond the front of the swivel tab of thewater away from the table, for they extend beyond 'the rear edge thereof as shown lin Fig. 23 and. discharge the water into a gutter or trough 195 running along the rear side of'the slide13. From this gutter, which has a Wide outlet at the rear, the water pours intoa pan 196 (Fig. 3) extending over the `base at the slide and having an extension 197 at one end, as shown 1n Fig. 5. The relatively great length of the outlet from' the gutter, which outlet extends between the points "a and b, shown in Fig. 5. and` the correspond-A ingly great length of the pan which under` 1n the travel of,

ies this outlet at all points the slide, allows a rapid and complete discharge of the water from the gutter.. An

- outlet 198 is provided in the pan over .a tank 199 at the rear of the base, and. in the tank is a pump 200 which "forces the Water through a pipe 201 to a nozzlei202 (Figi 3) adjacent to the point which engages the work. The samewater .is thus used over and over again.,

AComplete provision is made for catching and conducting back any waterl which may escape past the shieldsL 192 and lodge on `the surface of the swivel tablel 18.` Any wateres-t 3 caping' in this manner is allowed to iow into the T slot 47 from which two large holes near the ends, or more if desired','extend to the under side of the table 18. One Lof these is indicated by dotted lines at 203 in Fig. 23.` In the upper face ofthe slide 13 beneath the swivel table arev several `capacious transverse channels 204 shown in Figs.

19 and 23 which lead to the `gutter, 195.

Such of the water as might flow to the ex' treme endsof the swivel table is caught in pockets 205 formed in detachable end ieces These pockets discharge into the trough 195. remarked at this point that the carry the index lingers 26 previway ample prof It may be pieces 206 ously mentioned. In this many of them may be used'as may be required to occupy @At the ends of theslide e and conduct the greater part rear of the of the grinding wneelf 'direction in AJwhich this bight extends,

to the table as shown in Fig. 25.

lanes f vision is made for conducting all the water back to the tank andvpreventing any of it escaping outside-of the machine. The arrangement of. thechannels 204 prevents the accumulation of pressure between the slide and table which would cause anywater thus accumulated to spurt out at the ends thereof. As the channels are discontinuous and are separated by ribs of the slide which "eitend entirelyto the bottom of the swivel table. the utmost impedance is put in the way of endwise ilow ofthe water while the greatest `freedom is given for its flow into the' gutter. 13 are plates 207 (Figs. 1 and 25) having lapping lips 209`on the ends of the swivel table, and abuttingagainst lips 210 on `the end. .pieces 206. The abutting flanges 208 and 210 are complementally curved, one being concave and the otherconvex, aboutthe centei` ofthe swivel 19. "graduation marks 211 26 serves as index.- .I will nowdescribe the means for driving the grinding wheel and work and the spe= cial advantages ment, of means v have already mentioned Athe power belt which comes rounds `the pulley 51 on the drive shaft 49 (Figs. 2 and 4). This belt'is guided around an idlexpulley 212 which "allows it toy run from a countershat almost directly over the machine and causes it to surround the greater part Aof the pulley 51. 0n the shaft 49 `on the opposite side of the J the base fromthe pulley 51 is a cone pulley 213 from which a belt 214 passes over a complementa] cone pulley 215 on theupwith which the finger per part of the L. rIhe latter pulley is fixed to a, shaft 216 passing through the L on which is a pulley V217. The latter and two guide the' L,

and around them passes belt 220 which also flanges 208 over.;A

The flange 208 bears n of ,the particular, arrangewhich I/have adopted. I

passes around a pulley 221 se`v from a counter-shaft and sur` L-portion or post pulleys 218 and 219 Vare all within` lll] cured to theigrinding wheel spindle and contained between the bearings on the bracket over the pulleys 217 and 221 and" under the pulley 219, while the` lower stretch passes under the pulley 218. The pulley 219 is so situated as to make abight in the upper stretch 'ofxthe belt and is adjustable in the mounted upon a stud. 222 `clamped in a guide way 22S-in the base. Asythe ^base elzltceptf for' an `opening t e adjustably the y side of 224 at the rear and guide slot 223, I have provided a novel sary position.y Thlsmeans comprises ribs fcastin the base and passing from one side means 'forgplacing the belt 220-in thenecesofthe Lto the 'otherand so` arranged as toA guide the belt properly around the several pulleys when it is fed in. One of the ribs being iis entirely linclosed Y' The upper stretchfof the belt 220 passes lthat stretch of the `pulley 225 passes from a'. point in front of the pulley 217 downward .and to the rear of the guide roll 219. Thesecond rib 226 passes from a point above and in therear of the guide roll, under the same and upward toward the spindle ulley 221, terminating` close to the rear side thereof. The third rib 227 lies slightly below and parallel to belt passing from the '221'to the guide roll 218 and is carried around beneath the latter roll. Finally there is a rib 228 directly in front of the rear upwardly running stretch of the belt. It will be seen that in order to place the belt it is only Inecessary to ass one end through the opening 224 an' Hfeed it upwardly, when it will be engaged by the guides in succession and `pass properly around the several pulleys and guide rolls until it emerges again through the opening 224.

The arrangement of belting shown contains many valuable features.' Thev main shaft 49 is at apoint as near the floor as pos- This 'has two advantages, namely, that vibrations are absorbed by the licor of the shop rather than b the bed of the machine and so are not a lowed to impair the accuracy of the work; and-that it enables the longest possible driving belt to be used from an overhead countershaft. Itis` well known to those skilled in the art that a long ,i belt gives more power than a short one, andA this end is secured by .the distance of the shaft 49 from the iippercountershaft being the greatest possible. Then the disposition of thebelt 220 y:for driving' the wheel spindle enables the machines base to `be compact, while at the same time securing great power and enabling the slack to bertaken up. l This belt surrounds Eapproximately half or more than half of the circumference of'both pulleys 217 and 221, whence the tendency to sllpping is the minimum. The direction in which the taker-u roll 219 is adjustable being. ap roximatey'parallel to the bight of `the be t` which surrounds it enables the stretch to vvbe taken up without altering the y relation .of the belt to these two pulleys.

Beside the pulley 51 on the shaft 49 is a i small pulley 229 (Fig. 2) which drives the pump 200 by means `of a belt 230. The two stretches of this belt passy around two guide pulleys 231 and are deflected at right angles, passing around a pulley 232 on the pump shaft which lies uapproximately at right angles to the shaft 49. vAlso on the shaft 49 and besides the cone pulley 213 is another pulley ning over a pulley 234 on the top ofthe post 2. Such ulley'is connected to 'a shaft having one aring' in` the post and another bearin in a" bracket 235 which is fastened at one si eof the base 1 and passes to a point above una 1n the rear of the slide, such ,the work is accessible for measurement grinding wheel and about which passes `a belt 233 runbracket being partially shown in Fig. 1.

On the shaft isa drum 236 about which the grinding wheel is all on one side of the latter.v and also that the dead center projects from the foot stock a distance more than equal to the width of the grinding wheel face. Owing to these features, the slide can be moved to the left far enough to bring the entire length of the work clear of the grinding wheel, and thereby every point on with calipers. A feature alsotis that the grinding wheel is mounted close to the side of one ofthe bearingsfor the spindle, which bearings are large and massive, and are supported upon a post ywhich is short and of powerful build. This mounting gives great rigidity and capability of absorbing vibrations, and is specially adapted to support a large and broad grinding wheel when the work is fed directly up to it. From the fact that the space at -the side of the grinding wheel toward the head-stock is entirelyr open. or in other words. that there are no obstructions which could interfere with the vrotation of the face plate and dog on the head stock.

clamps b v which it is main portion of the baseextend rearward y beyond'the front of the post or standard 2. adjacent the inward side of said post, and are positioned beneath the grinding wheel and both forward and rearward of the axis thereof. This disposition 'of the bearing surfaces and ide ways beneath the both forward and rearward of the axis thereof gives increased stability to the cross-feed carriage and to the work-.holding slide mounted thereon. and firmly resists the downward pressure of the wheelv on the work.

I' have made provision for reproducing with accuracy, work pieces having shoulders. or having len hs of different diameters. so that the distances between the shoulders. or such lengths, will be correspondingly identical on all the pieces. This effect is secured by a templet dog 240 shown in Fig. 14, which is adapted to be mounted upon the `slide 13 to perform the functions of the dogs 115 and 116 in co-acting with the lever 97 'upon in diiferent Work This templet is adapted to be placed upon pins or analogous fastenings 241 (Fig. 1) rising from lues 242 which project from the front of the glide, and has shoulders 243, any pair of which may embrace' the lever 9T and alternately swing the latter back and forth in reciprocation of the slide. One pair of such shoulders controlthe reciprocations of the slide While a certain part of the work is being done, and when this part Iis completed the slide is shifted until another pair 0f shoulders embrace the lever, the templet being temporarily removed from'fthe slide or lifted high enough to clear the lever while the shift is made. It is very apparent that by the use of this templet absolute uniformity in the lengths of the part acted pieces may be secured. A different templet dog is naturally used for each particular pattern of Work. The manner of mounting the templet on the slide is not of great importance, and may be other than. that described, provided only the templet is so mounted that it Vmay be displaced out of the way ofthe dogs 115 and 116 when itis not used, and may also be so displaced as to permit shifting of the carriage to enable different parts of the templet to be operative.

I claim:

1. A grinding machine including in its construction a cross feed carriage, a Work holding slide mounted on said carriage and movable transversely to the feed of the latter, and mechanism for automatically7 driving said slide, including a gear supported on a stationary part of the machine and having a length as great as the distance of feeding of said carriage. a carriage in mesh .with and movable longitudinally of said driving gear, and further gearing driven by the second named gear and connected with the work holder.

2. A machine of the character described comprising in combination a grinding wheel, a work-carrier movable across` the face of said grinding wheel, a stationary shaft mounted on the base of the machine, a driving disk rotatably mounted on said shaft, means for rotating said disk. a driven disk and a drum connected thereto both rotatably mounted on the shaft. mechanism actuated by said members for reciproca-ting the Work carrier, transmission friction rolls supported by the shaft between said disks in contact therewith. and thrust bearings for said driving elements and said drum, respectively, mounted detachably on the shaft.

3. A grinding machine including a grinding wheel, awork holding bed movablev across the face of said wheel, means for reciprocating said bed including oppositely moving elements and a clutch for connecting either of said elements exclusively with the bed, an endwise movable rod for shiftlng gear mounted upon the` said clutch, a, hand lever engaged with said rod for moving the same; and a latch adapted to hold the clutch out of engagement with either driving element.

4. yAgrinding machine including ing wheel, a l work holdinor across the face of said wheel, means for reciprocating said bed including `oppositely moving elements and a-clutch for connecting either of said elementsexclusively with the bed, an endwise movable rod for shifting said clutch, a hand lever engaged With said rod for moving the same, having a projection on one side, and a latch pivotally mounted adjacent te said hand lever and having a notch adapted to receive said projection, the notch being solocated as to admit the projection when the hand lever is an intermediate position, and thereby hold the same and the clutch in neutral condition.

5. A grinding machine including a. grindingv Wheel,` a Work holding bed movable across the face of said wheel, means for reciprocating said bed including oppositely moving elements and a clutch for connecting either of said elements exclusively with the bed, anendwise movable rod for shifting said clutch, a hand lever engaged with said rod for moving the same, having a projection, a latch member pivotally mounted adjacent to said hand lever and adapted to be placed so as to rest under the force of gravity on the projection, said latch havin a notch so arranged as to slip over the said projection, gravity actuated, to arrest the lever and clutch in an intermediate position.

6. A grinding machine including a grinding wheel, a Work holding bed movable across the face of said wheel, means for reciprocating said bed includin oppositely movin 'elements and a clutch flor connecting eiter of said elements exclusively with the bed, an endwise movable rod for shifting said clutch, a hand lever engaged with said rod movably adaptedy a grindbed movable mounted adjacent to said lever to be disengaged therefrom and also to be placed in such position as to automatically lock the same under the inuence of gravity -when the lever and clutch are in a neutral position.

v'i'. A grinding machine includin construction a ing bed mova le across the face of said wheel, mechanism for reciprocating said bed comprising a shaft geared to the bed,

in its oppositely rotating drivingtr elements loose with respect to such sha a clutch between said elements ynon-rotatably engaged with the shaft and movable into connection with either element and simultaneously out of connection with the other, an endwise movable rod connected with said clutch for shifting the latter, collars on said rod, a

for moving the same, and a latch rinding wheel,'a wor -carrybracket fixed on a part of the machine having a depending stud, a. lbell crank lever ivoted on said stud having an arm embraclng the rod and contained between said collars, a movable bar engaged with the other arm of said bell crank lever, and means cont-rolled by the travel of said bed shifting the bar back and forth. Y 8. A grinding machine including in combination a grinding wheel, a work-carr ing bedmovable across the face of said w reel, reversal driving mechanism for said bed includinga reversing clutc-h and an endwise movable rod for operatinv said clutch, a lever operated 'automatica-l y by t-he movement of the bed for moving said rod; a hand lever for likewise moving the rod, and collars mounted on said rod and embracing those portions upon the rod, said collars being adjustable so as to permit the respective levers to occupy certain desired relations with one another.

9. A grinding machine including in combination with a grinding wheel an aiworkcarrying bed movable back and forth across the face of said wheel, driving mechanism including a. shifting reversing clutch for moving said bed back and forth, an endwise movable rod coupled to` said shifting the same, a rod, a bracket fastened to aV para. of downwardly therefrom, the lever being pivoted to the stud below the bracket, and means for swinging said lever back and forth at the ends of the reciprocation of the bed.

10. A grinding machine including in its construction the combination with a grinding wheel, of a work carrying bed movableback and forth across the face of the Work, oppositely rotating drivers, mechanism including a clutch for alternately couplingone of said drivers to the bed and simultaneously cutting theother therefrom, a clutch actuating bar movable by the bed through distances Vgreater than the travel of the clutch, means for coupling the clutch with the bar'having provisions for lost motion, means whereby the bed in each direction of travel initiates movement of the bar ,through :1n-amount equal motion, and automatic means for continuing the motion of the bar through a farther distance approximately equal to the distance necessary yfor complete shifting of the clutch.

11. The combination in a grinding machine with a grinding wheel and a workcarryingbed, of mechanism including a shiftable clutch for driving said bed back and forth, a clutch operating bar having a lost motion connection with the clutch and having also a V cam, a yielding actuator en- `tion of said base of said levers ,which operate clutch for, lever engaged with saidv the machine, a stud secured to said bracket' and projecting for reciprocatingthe approximately to such lostr 4gaged with said cam andv adapted bypress-l mg on a face of the cam to-lmove the bar, the longitudinal extent-of which face of said 'cam being substantially equal tothe amount of the aforesaid ,lostmotion and to the total movement of the clutch and clogging mec-hanism operated -by the bed for moving said bar at the conclusionof each trip of the bed. 12. A grinding machine comprising a base having' a main portion 4and having a 'post lived to the rear part of said main lportion of said base andrising above said base at one side of the center thereof, a grinding wheel rotatably carried by said postat the sidel toward the center of said base andvover said main portion riage supported and' guided on the main porfor forward and rearward movement transversely to the axis of the grindin wheel, said carriage being supported on said main portion'rearward beyond the front of said post and adjacent-the side of said post and beneath said grinding wheel and both forward and rearward of the axisthereof, means to move said carriagel forward and rearward supporting slide mounted to reciprocate on said carriage in front of said post and in a direction substantially parallel to the axis of said wheel, and means'to reciprocatesaid slide.

13. A grinding machine comprising a base, a post risin above said base at one end thereof, a grin ing 4wheel rotatably carried "by said post at the inward side thereof, a be movably mounted on the base, work holders the head stock being on the opposite side of the grinding wheel from the ost, -and av work supporting centercarried liy the foot stock and projecting therefrom a distance ing wheel face. s

14. In a inding machine `the combination with a grinding heel of 'a yreciprocable work-carrying bed, I bed and a clutch shifter operated by said dogs for effecting reversence of the movement of the bed, a hand operated mechanism bed, and means for {ixing Said lever rigidly in a stationary position whereby it may serve in conjunction with said dogs to gage the movements of the bed when the latter is manually reciprocate'd. 15. In combination -with the grinding wheel of a inding machine and the reciprocating wor -carrying bed thereof, a clutch shifting member for the bed, anda templet dog carried'by said bed, said'dog having shoulders at a definitedistance apart adapted to embrace said' clutch-shifting member and move the latter back and forth.

16. In combination wheel of a grinding machine and the reciprothereofa cross feed car- Greater than the width of the grindon said base, a workf ycomprising `a head stock and a foot stock on 'the.bed, and

`dogs mounted upon said with the grindingY cating work-carr shifting member the carriage, aplurality of adjustable fingers carried by said feed member, and a complemental stop for each of said lingers, each said stop being displaceablc from the path of its respective linger whereby to permit such finger to pass it without interference.

18. A grinding 4machine combination a grinding wheel, a work-holding carriage movable toward and from the wheel, a rotating feed member for so moving the carriage, a set of stop fingers carried b v said feed member and each independently adjustable in the direction of ymovement of said member, a stop for each of said fingers pivotally mounted with provision for independent movement., an abutment for said stop whereby the same is held immovably in the path of th'e corresponding feed finger,

v the stop being movable about its pivot ont of the path of the corresponding finger. j

19. A grindlng machine 'comprising 1n combination a grinding wheel, a work-holdlacs ing carriage movable toward and from the wheel, a rotating fee'd member for so moving the carriage, and a `plurality of complemental stop members carried by said feed member and normally stationary, one member of each of such ently of the others from the path of the complemental member, a graduated disk carried by the feed member and an index cooperating with said disk.

20. In a machine of the character described having a cross feed carriage, a cross feed screw, and means for turning said screw, stop fingers adjustably mounted uponsaid screw and each independently adjustable around the same, a stud independent of said feed screw, stops pivotedon sa-id stud each in the path of one of said fingers, and an abutment for said stops to sustain them against the thrust of said fingers, the stops being adapted to swing over and away from said'abutment and out of the paths of their respective fingers. y

21. In a combination of the character described having a cross feed carriage and a cross feed screw, bearing disks keyed upon said screw, combined sto' fingers and clamps surrounding said bearings independently and each having a clamping device for tightening it upon its bearing, and complemental displaceable stops for the several fingers.

22. In a combination'of the character decomprising in pairs being displaceable independ-Y' plate, said channels being feed carriage and a` mental displaceable stops for the several fingers, a graduated disk fixed to the feed screw and a finger adjacent to the graduation of said disk whereby to regulate the setting of said fingers.

23. In a grinding tion with a longitudinally reciprocating bed having a water trough near one edge, a plate swiveled upon said bed having longitudinal guide ways for a work holder, said guide ways being cut away adjacent to the ends of the plate, and water shields secured to the plate beside the cut away ends of said guide ways and having pockets or channels arranged to discharge into said trough.

24. In a grinding machine the combination with a longitudinally reciprocatingbed, of a work-holding plate mounted thereon having a longitudinal slot for securing a' work-holder, said bed having a trough at one side of the plate and having transverse channels opening into said trough and eX- tending under the plate, and the plate having passages leadlng through from said slot, whereby tov permit entering the slot.-

25. In a with a reciprocating bed of a work-holding plate mounted upon said bed and a work support on said plate, the bed having a trough at one side of the plate/to receive water and having transverse channels extending backfrom said trough under the discontinuous, and ends-of the plate, from the ends of shields overlapping the whereby escape of water the bed is prevented. i

26. A grinding machine comprising in combination a base, a work-carrying bed machine the combinar drainage'of water grinding machine the combination mounted upon the top of said base, and having means for su i portinfr the work piece said bed having b a so a water trough at its Arear edge, a pan detachably mounted on the top ofthe base in rear of said bed having a ortion below the outlet of said trough an having also another outlet.

27. A grinding machine comprising in combination a base, a ed at the top and front a lon itudinally movable Work bed on said slide aving a water trough along its rear edge, a water tank at the rear of said base, and a pan detachably mounted on the top of the base having one edge beneath the water trough and extending longitudinally of the bed sufficiently far to underlie the outlet from the trough in all positions of the latter, said pan having an outlet also leading into said tank.

side of said base,

cross feed slide mountf 'cent to said spindle,

the column*` a 28. In a grinding machine consisting of a base having an-,upright post at one corner, a grinding wheel supported on said post, a work-carrying bed Inova-bly mounted upon the forward portions of the base in front of the grinding wheel. `said bed having a water-conducting trough, and a pan detachably1 mounted on the topl of the base beneath and to the rear of the bed and having an extension passing between the bed and the post. for collecting and conducting away water discharged from the trough.

29. In a grinding machine, a box-like stable base having an L-shaped rear extension adjacent to one side thereof, said extension being of box formation and rising above the top of the other part of the base, to constitute a column, the major part of the base being adapted to .support a work holding carriage, a grinder wheel holder secured to said column above the base, a grinder wheel spindle mounted in said holder and crossing the forward side of the column` the front wall of the column being open adjadrivingr shafts mounted rotatablyv in said column adjacent to the upper and lower ends thereof respectively, a driving belt operatively engaged with the lower of said shafts, a transmission belt simultaneously engaged with both shafts, a pulley mounted on the upper shaft within belt passing around said pulley and also around the grinder spindle, and guide pulleys mounted within the column for said belt arranged to cause the belt to surround more than half the circumference of both the pulley and the spindle, and one of said guide pulleys further disposed to guide the belt in a bight extending between the pulley and the spindle with the opposite sides of such bight approximately parallel, the last-named pulley being adjustable in approximately the direction in which such bight extends to take up slack and regulate the tension of said belt.

30. A grinding machine 'including in its construction a post, a pulley in said ost, means for driving the pulley, a grin ing wheel spindle pulley su ported at the Aside of the first named pu ey, guide pulleys within the post arranged to conduct a driving belt around and between said pulle s, and

ribs within the post extending near t e several stretches of such belt and arrange-d to direct a belt around the pulleys in proper order when such belt is fed into the post. 31.` In a grinding machine a casing, ing, driven, and Guide pulleys in said casing out of regular tllinement, and guiding ribs within the casing extending between points near successive pulleys, ,whereby to guide a belt fed endwise into the casing to and around the pulleys in predetermined order. 32. In a grinding machine in combination with a reciprocating work-carrying bed, a variable speed reversible mechanism for driving said bed, means for actuating the speed varying elements of said -mechanism including a rod connected to a clutch mechanism, an upright shaft having an arm linked to said rod, a handle on said shaft g for turning the same, a fixed plate throu h which said shaft extends and a latch e ement connected with said handle for llocking the shaft Ain various positions in cooperation with said plate.

33. A grinding machine comprising a base having a main portion and having a post fixed to the rear part of said main rtion of said base and rising above said ase at one side of the center thereof, a grinding wheel rotatably carried by said post at the side toward the center of said base and over said main portion thereof, a cross-feed carriage supported and guided on the main portion 'of said base for forward and rearward movement transversely to the axis of the grinding wheel, said carriage being supported on said main portion rearward beyond the front of said post and adjacent the side of said post and beneath said grinding wheel and both forward and rearward of the axis thereof, means to move said carriage forward and rearward on said base, a work-supporting slide mounted to reciprocate on said carriage in front of said t andA in a direction substantially paralle to the axis of said wheel, and means to reci rocate said slide, said slide having a wor dridvn head stock mounted thereon at that en o side of said grinding wheel from said post.

In testimony whereof I have hereunto aixed my signature;

JOHN BATH.

drivsaid slide which is on the opposite

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