US1689440A

US1689440A - Chucking machine

Info

Publication number: US1689440A
Application number: US636856A
Authority: US
Inventors: Arthur J Lewis
Original assignee: BAIRD MACHINE CO
Current assignee: BAIRD MACHINE CO
Priority date: 1923-05-05
Filing date: 1923-05-05
Publication date: 1928-10-30
Anticipated expiration: 1945-10-30

Description

Oct. 30, 1928.

INVENTOR ATTORNEY 7 Sheets-Sheet 1 A. J. LEWIS CHUCKING moimm Flled May 5, 1923 Oct. 30, 1928.

A. J. LEWIS CHUCKING MACHINE '7 Sheets-Sheet Filed May 5, 1923 1 ATTORNEYS '7 INVENTO 6 Oct. 30, 1928.

A. J. LEWIS CHUCK'ING MACHINE 7 Sheds-Sheet 5 Filed May 5, 192

ATTORNEYS, v

Oct. 30, 1928.

A. J. LEWIS CHUCKING MACHINE 7 Sheets-Sheet 4 Filed May 5, 1925 INVENTOR BY X ATTORN EYS Oct. 30, 1928.

A. J. LEWIS CHUCKING MACHINE Filed May 5, 1923 7 Sheets-Sheet 5 kMN ' INVENTO ATTORNEYS Oct. 30, 1928.

A. J. LEWIS CHUGKING MACHINE Filed May 5, 1925 7.$heets-Sheet 6 TOR': v I

ATTORNE Y5 Oct. 30, 1928.

A. J. LEWIS CHUCKING MACHINE Filed May 5, 1925' '7 sheets-sheet 7 ATTORNEYS.

Patented Oct. '30, 1928 UNITED STATES PATENT OFFICE.

A'a'rnun J. LEWIS, or sraA'rroIm, oonnnc'rrcur, ASSIGNOR :i'o THE BAIRD MACHINE COMPANY, or namenronr, connncrrcur, A CORPORATION or conunc'rxcu'r.

GHUGKING MACHINE.

' Application filed May 5, 1923. Serial No. 636,856.

This invention relates to metal working machines and particularly to the type 1n which there are a plurality of work carrying spindles, with one or more tools and means for causing relative movement between the spindles and the tools to perform the requlred operations, and also whereby a plurallty of operations may be performed at the same time or in succession.

It has for an object to provide'a machlne of this type in which there is an lmproved mounting for the work carrying spmdles, and an improved support for the tools whereby the pro er relation between the spmdles and 1 the tool holders is properly maintained.

It is another object of the invention to provide an improved feeding means for the tools, and so arranged that if desired where a plu rality of tools are used they may be given different rates of feed and also different lengths of stroke.

It is a further object of the invention to .so mount the spindles, the driving means therefor, the tool support and the tool feeding means that the work carrying chucks and the'tools are easily accessible at all times. It is another object of the invention to provide an improved driving means for the work carrying spindles and one in which the individual s indles may be operated at different speeds if desired.

. It is a still further object of the invention to provide amachine of this t pe in which at the-end of a cycle the drive or the indexing mechanism will be automatically disconnected sothat should the operator not have finished removing the finished piece or inserting a new ie'ce, indexing of the s indles will not take-p ace until the operator 1s prepared for the same. a

With the foregoing and other objects in view, I have devised the construction illustrated in the accompanying drawings, in-

which Fig. 1 is a front-sideelevation of the machine, portions of the same being broken away to more clearly showthe construction. Fig. 2 is an end view of the machine lookl ing from the right of Fig. 1.

ig. 3 is a transverse section substantially 1 ..upon line 3-.3 of Fig. 1.

Fig. 4 is a longitu inal section through the tool support, showing the tool feeding means. Fi 5 is'a transverse section thereof sub stant1ally on line 5-5 of Fig. 4.

. Fig. 6 is a detailed layout of the main driving means showing the speed changes therefor and also the means for driving the tool feeding means and the speed changing means therefor, the shafts being shown in a common plane. r

Fi 7 isa view from the right of Fig. 6. showing the proper relative positions of the shaft comprising the tool feed driving means.

Fi 8 is a top plan view'of the main friction rive.

Fig, 9 is a top plan view of a ratchet drive taken substantially on line 9-9 of Fig. 6.

Fig. 10 is a transverse detail View immediately in front of the chucks for carrying the work, showing the turret indexing means.

Fig. 11 is a side view thereof looking from the right of Fig. 10.

Fig. 12- is a transverse detailed sectional view substantially on line 12'12 of Fig. 1.

Fig. 13 is a partial side elevation and partial sectional view takensubstantially on line 13l3 of Fig. 12. t

Fig. 14 is a detailed sectional view substantially on line 14--14 of Fig. 13.

Fig. 15 is an end view showing the details of means for changing the speed of the individual work spindles.

Fig. 16 is a detail sectional view thereof substantially upon line 1616 of Fig. 15.

Fig. 17 is a view transversely of the machine substantially 1, showing the hand indexing device.

F ig. 18 is a front view of this device lookin from theleft of Fig. 17.

i g. 19 is a top plan detailed view of the means for automatically increasing the speed of rotation of the. tool feed drum for returning the tools to their original position at the end of the cycle and looking downwardly on. Fig. 17, and

upon line 1717 of Fig. I

Fig. 20 is a detailed sectional view of the hand operated device for stopping the feed and indexing mechanism on an enlarged scale.

In the embodiment shown the machine oomprises a bed 20 mounted on suitable le S 21 and v 22, the bed being dished as shown at ig. 3 to catch the oil us'edin the various operations to be performed. Mounted within the bed is the frame indicated generally at 23 in which are mounted the various mechanisms. Interat given intervals rotating this turret by a step a block 29 having similar teeth carried on the end of a. spindle drive shaft 30. These spindle drive shafts are adapted for longitudinal movement toward and from the clutch blocks 28 for the purpose of disconnecting blocks 28 and 29 when the turret is rotated and to then connect these blocks for driving the spindles. The spindles 26 rotate at their forward ends in bushings 31 in the turret and at the rear ends in the bushings 32. To the rear end of each'spindle is secured a block 28, a suitable adjusting screw 33 beingthreaded in the'turret embracin the spindle and. engaging the end of the bus ing 32 for properly positioning the spindle in the turret, and a chuck 27 being connected to the forward end of each spindle. The means for shifting the spindle drive shafts for connecting and disconnecting the clutch blocks 28 and 29 is shown in detail in Figs. 12, 13 and 14. As the operation of inserting and removing the work is to be made while various machining operations are being performed on the work, only five of the.

spindles are driven, the sixth spindle being stationary to allow insertion and removal of the work. The spindle drive shafts 30 have two bearings 34 and 35 in the frame 23 of the machine adjacent the ends of these shafts,

and to the rear of the portion of the frame carrying the bearings 35 is a bracket 36 ,secured to the frame by This bracket has a flange 38 provided with openings 39 to receive the ends of the spindle driver thrust pins 40, these pins having a flange 41 between which and the flange 38 are suitable ball thrust bearings 42. The end of each pin 40 extends into a longitudinally extending opening in the shafts 30 in which is a coiled spring 43, this spring reacting at its opposite ends on shaft 30 and the end of the pin 40, and will thus tend toforce the shaft 30 to the right, as shown in Fig. 1, that is towards the spindles 26, and will retain the chuck blocks 28 and 29 in engagement.

For the purpose of disconnecting the clutch blocks 28 and 29 preparatory to the indexing operation of the work spindles, a sleeve 44 is mounted on the bracket 36 between the flange 38 and the frame of the machine, and this sleeve is adapted for rotary movement on this bracket. This sleeve is provided with an arm 45 carrying a roller 46 adapted for ooacting with a cam 47 carried by the cam drum 48. Mounted on the sleeve is a flange 49 provided with suitable openings through which the suitable screws 37..

shafts 30 extend, these shafts being provided with a flange 50 between which and the flange 49 is a suitable ball thrust bearing 51. The

flange 49 is provided with a cylindrical portion 52 embracing the sleeve 44 which is provided with a plurality of inclined slots 53 in' which are suitable rollers 54 carried on pins 55 mounted in the sleeve 44, so that when this sleeve 44 is rotated under the action of cam 47 on roller 46, the reaction of these slots with the rollers 54 will move flange 49 outwardly and will, at the same time, slide shafts 30 to the left as viewed in Fig. 1, to remove clutch The spindle drive shafts 30 are provided" with one 'or more keys 56, and mounted on these shafts are a series of gears, in the present instance three, 57, 58 and 59, of different diameters which are longitudinally slidable on the shaft but rotate with the shaft because of the keys 56. These gears are each adapted to mesh with one of three gears 60, 61 and 62 formed on a sleeve 63 which is mounted to ro tate on a short hollow shaft 64 supported at 7 its opposite ends in the end of the tool supporting bar 113 and the frame 23 at the inner side of bracket 36. The gears 60, 61 and 62 are rotated by means of a main drive gear 66- I which is connected to the sleeve 63. by any suitable means, and this main drive gear is driven by the main drive pinion 67. In the individual drives for the work spindles the gear 57 is adapted to mesh with thegear 60,

gear 58 with gear 61, and gear 59 with gear 62. Thus it will be seen with a given rate of rotation the main drive gear 66 three different speeds may be given to each'work carrying spindle depending on which of these gears are in mesh, and means is provided for shifting each set of

gears

57, 58 and 59 independently on shaft 30 to git re these three s eeds to each spindle. In Figs. 15 and 16'is s own one form'of means by which this may accomplished.

For each set of gears there is a shipper rod mounted to slide in the frame these shipperrods 68 carry suitable forks 69 adapted to seat in grooves 70 in a collar 71 secured to each set of gears. These shipperrods project beyond the end of the frame where they areprovided with suitable hand knobs 72 for shifting the rods and with them the gears 57 58 and 59.

For the purpose of holding the three gears in proper position the rod 68. is provided with suitable gr0oves'7 3 adapted to be engaged by a lug 74 carried by a pin 75 held against the rod 1 the shaft by suitable keys 79. This clutch by a spring 76, there being a groove 73 for each of the three positions of the gears, and as there is one of these shifting rods for each set of gears the speed of each spindle may be changed independently of the other spindles. The driving means for the main drive pinion 67 is shown in Fig. 6, this pinion being mounted to rotate with a shaft 77 on which is slidably mounted a clutch sleeve 78, this sleeve, however, being secured to rotate with sleeve has driving teeth on its opposite ends adapted to mesh with similarteeth carried by gears 80 and 81 which gears are loosely mounted on the shaft.

clutch sleeve at such a distance that the sleeve is in driving relation with only one ofthese gears at a time. A short shaft 82 is provided upon which are secured a series of gears 83, 84, 85 and 86, the gear84 being inimesh with gear 81 and gear 86 in mesh withi gear 80. An-' other shaft 87 is provided on which are.mount-' ed two sets of sliding gears88, 89, and 90, 91,

these two setsof gears, however, being mounted to turnwi'th the shaft-by suitable keys 92 and 93 respectively. By sliding gears 88, 89 on this shaft the smaller gear 88 may be I meshed with gear .83 and largergear 89 may be meshed with gear 85. Still another shaft 94 is provided on which is loosely mounted a pinion sleeve 95 carrying two pinions 96 and 97 adapted .to mesh with gears 90 and 91 respectively, as desired, by shifting gears 90 and 91 on the shaft 87 and secured to this sleeve 95 is a cltuch drum 98. Keyed to shaft 94 but longitudinally slidable thereon is a friction clutch cone 99 adapted to engage the drum 98 in the usual manner for driving the carries a second arm 109 with a roller 110 disconnect this 'main' clutch drive.

adapted to coact with camsjlll and 111 mounted on the cam drum 48, and so arranged that when the roller .110 is lifted by means of cam 111, sleeve 100 will be shifted to Cam 111 is arranged to throw the clutch in again at the proper time. The elements are so ar-- "ranged that the clutch is disconnected before flange 49 is operated to disconnect the work spindle clutches 28, 2 9 and isnot thrown in again until these clutches are again engaged or adapted for engagement after the indexing operation. When clutch 98-100 is disen- They are of different diameters and are located at opposite sides of the I gaged it will be obvious the power is disconnectedfrom the Work spindles, but as shaft 94 continues to rotate, the tool feed and indexing mechanism is operated independently of this clutch as will presently be described.

For the purpose of manually throwing in or outthis clutch, a hand lever 112 ismounted on the shaft 108.

The tools for performing certain of the machine operations are mounted on an improved type of support, and are also advanced by an improved feeding means. This ,tool support comprises a hollow bar 113.

This bar or support has no connection with the turret 25 but is mounted on the frame entirely independent of this turret. The turret is provided with a longitudinal opening 114 therethrough through which this bar extends, but this opening is larger than the bar so that there, is no connection between the two.

The inner end of the bar is reduced at 115 and mounted in a bearing 116 in the frame 23 on the rear side of the turret and at itsother end is reduced at 117 and mounted in a bearing 118 carried by the frame forwardly of the turret- Thus it will be seen the bar is rigidly supported by the frame at its 'opposite ends and on opposite sides of the turret, but it projects forwardly of the turret a sufficient distance to carry the tool slides indicated at 119 in proper relation to the chucks 27. This toolsupporting bar is rigidly mounted-in the frame and is stationary. having no turning movement. Various means may be provided for securing it against rotation but Ihave shown a cap 120 secured to the outer side of the support 118..

by suitable screws 121, and prov ded with dowel pins'122 extending through this cap into the end of the bar 113.

The bar is hollow and preferably cylindri- -c'al except where it is provided-with guideways for the tool slides. In the present embodimentthese guides are dovetails 123 extending longitudinally of the support and there are six of these dovetails, the sup-' port .being substantially hexagonal at this point, as shown at Fig. '5. The tool slides 119 have longitudinally extending dovetail grooves tofit the dovgtails on the support. In thecenter of each dovetailthe support is provided with a-slot 124 leading to the space at the center .of the bar for the passage ofa connecting means byjwhich the I 'tool slides are driven from the feed mechanism. Adjustably mounted on the slides by means of suitable bolts 125 extending through slots 126 are blocks 127 and these may be adjusted on the slides longitudinally thereof by means of a suitable screw 128 threaded into the blocks and secured to .the slide by plates 129, the screwpreferably being pro- V vided with a collar 130 having a scale to indi cate' the adjustments. Each block 127 is provided with a finger 130' extendingthrough the slots 124 and this finger is provided with a lug 131 adapted to seat in recesses 132 formed in the peripheries of feed collars 133 and 134. It will he noted from an inspection of Fig. 4 that the fingers 130 are not placed in the center of the blocks 127 but are placed between the center and one end of from certain of the other tools, they are connected to the other collar, which may be given a different rate of speed and a different stroke. 1 The means for imparting different rates of speed and different'strokes to the collars 133 and 134 comprises a central longitudinally slidable bar 135 to which collar 133 is connected and a tube 136 embracing this bar to which collar 134 is connected, this tube being also longitudinally slidablev and mounted in suitable bearings in .the supporting bar 113. The bar 135 slides within this tube and is also provided witha bearing 137 at its free outer end'in the cap 120. At their inner ends the bar 135 and tube 136 have connected there with suitable blocks 138 and 139 respectively,

7 9 these blocks carrying suitable rollers 140 adapted to coactwith the

cams

141 and 142 on the cam drum 48. Thus the rods or bars 135 and 136 are advanced and with them the tools which are connected therewith at a rate and adistance depending on the shape of the

cams

141 and 142. At the end of the work strokes these elements with the tools are re- .turned to their original positions'by the cam blocks 143'and 144 respectively, carried on the surface of the drum 48. v

Means is provided for changing the rate of rotation of cam drum 48 to give different rates of feed for the tools, and means is also preferably provided for increasing the speed of rotation of this drum during thereturn movement of the tool slides and also for indexing, to give a more rapid return and thus save time in preparing for the next operation. The means for doing this is shown more particularly in Fig. 6 in which the gears are shown diagrammatically and the-shafts as in a common plane though their actual positions are shown in Fig. 7 On the drive shaft 94 is a spur gear-.145 and a smaller gear 146 adapted to mesh respectively with gears 147 148 formed on a ear sleeve 149, which is adapted to slide on shaft 150 but is keyed to rotate therewith by suitable keys 151. By

shifting this 519M149 either ears and 4 147 or 146 and 148 may be rought into mesh as desired, this shifting being done by suitable means as a lever, not shown, on the. outside of the machine. Also mounted on the shaft 150 are two gears of difierent diameter {152 and 153 adapted to mesh respectively with two

gears

154 and 155 on a shiftable gear to turn therewith by keys 158. This sleeve sleeve 156 slidable on shaft 157 but secured 156 may be shifted in the same manner as 4 sleeve 149. Also carried the shaft 157 are two gears 159 and 160 adapted to mesh with sliding gears 161 and 162 respectively mounted to turn the shaft 163 by means of keys 164. Also mounted-to turn with shaft 163 are two gears 165 and 166 of different di-- ameters adapted to mesh with gears 167 and 168 respectively, slidably mounted on shaft .169 but secured to rotate therewith-by suitable keys 170. Shaft 169 carries a bevel gear 171 which meshes with a second bevel gear 172 keyed to a sleeve 173'carrid/by a vertical shaft 174, this sleeve being adapted to rotate on this shaft. Upon the upper end of this shaft is a toothed ratchet 175 (Figs.

6 and 9) within a collar 176 which carries apawl 177 normally held in engagement'with the teeth of the ratchet by a spring178 so that as the ratchet is rotated in a counterclockwise direction as viewed in Fig. 9, it will, throu h the pawl, rotate collar 17 6, and as collar 1 76is keyed to-vertical shaft '174 this shaft will be driven thereby. Mounted on this shaft to rotate therewith is a worm 179 meshing with worm; gear 180 loosely mounted on horizontal shaft 181, which gear is on a sleeve having at one .end thereof suitable'clutch teeth 182 adapted to mesh with a V clutch sleeve .183 slidably mounted on the shaft 181 but is'secured to rotate therewith by suitable keys 184. This sleeve has clutch teeth 185 on its other end adapted to mesh with similarteeth 186 on another worm gear 187 also loosely mounted on shaft 181. Gear 187' meshes with a worm 188'on shaft 189'. which extends transversely through the frame of the machine as shown in Figs. 2 and hand crank 191. The shaft 181 is provided with; a pinion 192 meshing with internal gear 193 on the cam drum 48 for rotating this drum. Whenclutch sleeve 183 is shifted to the left to engage with worm gear 180,

shaft 181 on the cam drum will be dIIVQ IT FZF- .17 provided with square ends to receive a from the vertical. shaft 174, but when this sleeve 183 is in engagement with gear 187 shaft 181 and the cam drum may be rotated by hand through the shaft 189. As the indexing mechanism. for the spindle carrying turret 25 is operated from the shaft carrying the cam drum 48, by mechanism presently to be described, it will be plain that through this mechanism just descnibed the work spindles maybe indexed by hand if desired,

' and it also allows feeding of thetools by hand for settingup the machine and adjusting.

For the purpose of increasing the rotation of the cam drum 48 for the purpose of giving a quicker return to the feed mechanism and also quicker indexing of the work spindles, loosely mounted .on the 'upper'end of vertical shaft 174 is a sleeve 194 also. having a bearing in the frame of the machine, and carried by this sleeve is a beveled gear 195 meshing W1th a beveled gear 196 secured to shaft 94. At its opposite end the sleeve 194 carries a clutch drum 197. Secured on the shaft 174 so as to rotate therewith but" slidable thereon is a clutch flange 198 adapted to be moved to and from drivlng engagement with drum 197 by means of fingers 199 and sleeve 200. Thus it will be seen that when this clutch is engaged the shaft 174 will be driven directly by

gears

195 and 196 and at a greater speed than through the gear mechanism. 145

to 172, and while this clutch is engaged, the.

collar 176, as it is secured to the shaft 174, will rotate faster than the normal driving means therefor, which is sleeve 173, but it is allowed this rapid movement through the pawl and ratchet 17 5-177. The sleeve 200 is shifted on the shaft to engage the clutch 197 and 198 automatically at the end of the feed stroke of the tools by the lever 201 shown in Figs. 17 and 19. This lever is automatically operated at the correct time by suitable cams 202' on disc 202 carried on the cam shaft 203.

In the forward part of the machine is provided means for shifting the clutch sleeve 183. This comprises a longitudinally movable slidable rod 204 bearing an arm 205 including a fork adapted to enter the groove 206 in the sleeve 183. Secured to this rod is a collar 207, and between this collar and the frameis a spring 208 tending to move the rod to the right, as viewed in Fig." 18, and hold sleeve 183'in engagement with the worm gear 187.

Pivoted on the frame is a hand lever 209 provided with a fork 210 engaging in a sleeve 211, which sleeve is slidably mounted on, therod 204, and the end of this sleeve is adapted to engage an upper inclined wall upon a lug.

downwardly out of engagement with the' notch 216. As the rod 204 is thus no longer secured, the spring 208 will force the same to the right as shown in Fig.18, moving sleeve 183 out of engagement with gear 180 and into engagement with gear 187, stopping the automatic feed and connecting the cam drum with the hand feeds 189 and 191. Means is also provided for automatically removing the cat-ch plate 213 from the notch 216, compris-r inga eam219 carried by the shaft 203 and adapted at the'proper time to engage a finger 220 pivoted to the lever 214 at 221, which finger is normally held against a stop pin 222 by spring 223 but will ield in the opposite direction should the s aft 203 be rotated backwards b "the hand operatingmechanism 189191. hus there'is a single hand con- ,trol for connecting the power with the feeding and indexing mechanisms in a locked relation, and by the same control the locked connection may be released at any point in the cycle of operation. There is thus provided hand controlled means for starting or stop- I ping the feeding and indexing mechanism at cycle of operation. 7 I v The means for indexing the turret and the ,any polnt in its cycle and also. automatic means for stopping the feeding and indexing mechanlsm at a predetermined point in its workoarryingspindles is indicated in Figs.

10 and 11, and comprises the well known Geneva movement. Carried by the turret at ts inner end are 'a'series of blocks 224 havmg longitudinal grooves 225 therein, these blocks being arranged so that the grooves run radially of theturret, and they correspondin 1 number to the number of spindles, in the pres entinstance six. Carried on the cam drum shaft203,is a cam disc 226 having an arm carrying a roller 227 adapted upon each revo'.

lution of the shaft to enter a 'groove 225 in one of the blocks and rotate the turret one sixth of a revolution. Means is provided for locking the turret in the proper position to alignment with the spindle drive shafts 30,

For this purpose, on theperiphery of the turret are'mounted a plurality of plates 228 having notches 229 therein adapted to receive the lug 230 of a locking piece 231 mounted to reciprocate in the frame. This locking piece is automatically'withdrawn from the notches r 229 by means of a lever 232 fulcrumed in the frameat 233 and provided at its upper end with a head 234 adapted toengage a shoulder roller 236 carried by'the lever 232. Thus it y *will be apparent that as the disc 226rotates Q with shaft 203 and the cam drum 48, at the, end of the cycle cam lug 235 will retract looking piece 231 unlock-ing the turret which will then be rotated a partial revolution to advance each work carrying spindle to a position in alignment with'thenext spindle driv 105 g 7 bring the work carrying' spindles. 26 into ing shaft. After the proper movement. has been given to the turret, roller 236 will leave block 235 allowing the locking piece 231 to be moved inwardly 'to locking position by a spring 237. After this has taken place cam 47 will allow engagement of the spindle driving shafts with the clutch blocks 28 on the work carrying spindle ready for driving them on the next operation."

There are also preferably provided two tool slides on opposite sides of the frame for carrying suitable facing tools or the like, these tools moving transversely of the work carrying spindles andare shown with their operating means in Figs. 1, 2 and 3. Mounted on the frame so that-they may be adjusted longitudinally thereof areslides 238 and 239 which are normally stationary,""ad'justing screws therefor being shown at 240, and carried by these slides are tool carrying slides 241 and 242 which movetransversely of the axes of the work carrying spindles. hey are reciprocated by suit-able guides carried by the slides 238 and 239, bymeans of arms 243 and 244 respectively carried on

shafts

245 and 246. These shafts are operated to impart the feeding and return movements to the slides 241 and 242 by a cam plate 247 carried on the shaft 203, this cam plate being provide'd with cams on its opposite faces indicated at 248 and 249 coacting with

rollers

250 and 251 re-' spectively on

arms

252 and 253 secured to the

shafts

245 and 246 respectively.

It is believed the operations of the various devices will be clear from the foregoing description. By means of the specific drive shown for the work operating spindlm, not only may the'rate of rotation of these s mdles be varied as a whole, but the spec ofeach spindle may be regulated independently of the other'spindles. Also through thetrain of gearing shown in Fig. 6 the rate of rota- 1 tion of the cam drum 48 and shaft 203 may be 1 varied. B using

different cams

141 and 142 the rate 0 feed and the length of stroke imparted to blocks 133 and 134 and to the two slides connected therewith may By means of the cam 111 shafts 108 and 105 and clutch 98, the'main drive for the work spindles is automatically disconnected at the end of a cycle, or during the indexing op'era-' tion to facilitate connection and disconnec- I tion of clutches 28--29, and may be disconnected at any time by the hand lever 112.

Through the clutch drive 197 automatically operated by lever 201 the tools are automati cally returned at the end of an operation to p the position at the beginning of the operation by an accelerated movement. By means of the mechanism shown in Figs. 17 and 18 the shaft 181 driving cam drum 48, cam drum shaft 203 is automatically disconnected from the power feed at the end of a cycle and con-- nected to thehand feed 191, hand operated means 209 being provided for also effecting be varied;

this change at any time desired. Upon continued rotation of the cam drum the spindle driving shafts 30 are automatically disconnected from the work'carrying spindles by means of cam 37 operating through flange 49, and after the turret with the work carrying spindles has been advanced to the next position through the Geneva movement mechanism, as shown in Figs. 10 and 11, these spindle drive shafts are automatically returned to driving engagement with the spindles. Still further that as the cam drum and its shaft are rotated the various tool slides with the tools carried thereby are automatically advanced and retracted by their respective cam mechanisms, the machine being semir automatic in that the rough work is placed in a chuck and the finished piece removed by the operator, and although the operations are performed automatically still the machine under the control of the operator at all times.

The disconnection of ppwer drive at the end facilitate removal and insertion of the work,

the only drive mechanism that is located at this "side of the turret being that for the slides 241 and'242. This leaves a short machine inc forwardly of the turret allowing the operator to quickly and easily pass from and to either :side of the machine. The tubular mounting \faor the tools, that is supporting bar 113, gives very rigid support for the same -on the frame, and at the same time allows placin of the feed mechanism for the tools carried by this bar within the same where it is out'of the way and does not take up space around the too supporting bar. I

- Having thus set forth the nature of my in vention, what I claim is:

1. Ina machine of the class described, a supporting frame, a rotatable spindle carryingturret mounted in said frame, and a tool support extending through the turret and supported by the frame on opposite sides of the turret independently of the turret.

, 2. In amachiHe of the class described, a

supporting frame, a rotatable spindle car rying turret mounted in said frame and provided with an opening therethrough, a tool support extending throughsaid opening and spaced from the walls thereof, means for supporting the tool support in the frame at the 1 back of the turret, means, for supporting the tool support on the frame at the front of the porting means.

3. Ina machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending through the turret and supported by the frame on opposite sides of the turret, tool carrying means slidably mounted on the tool support, and means within the tool support for sliding said carrying.

means.

tool support at the front of the turret, and

feeding means for said tool carrying means on the opposite-side of the turret.

5. In a machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending through the turret and supported by the frame on opposite sides of the turret, one or more tool carrying slides mounted on said support, means within the support for operating said slides, and means located baclr of the turret for operatingsaid slide operating means.

6.-In amachine of the class described a hollow tool support, a plurality of tool slides mounted on said support, a plurality of slide operating members within said support and adapted for independent operation, means for operating said members, and means for connecting the slides to one or the other of said members.

7. In a machine of the character de scribed, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending through the turret and supported by the frame on opposite sides of the turret, movable tool carriers mounted on the tool support, means within the support for moving said carriers, and

means .for operating said means 8. In a machine of the class described a hollow tool support, .a plurality of tool slides mounted on said support, a plurality of slide operating members within said support and adapted for independent operation, means for operating said members, and means whereby the slides may be-connected to either member.

9. In a machine of the class "described a hollow tool support, a plurality of tool slides mounted on said support, a plurality of concentrically mounted longitudinally reciprocable slide operating members in said support and adapted for movement relatively to each other, means for operating said members, and means for connecting the slides to said members.

- 10. In a machine of the class described a hollow tool support, a plurality of tool slides mounted on said support, a plurality of concentrically mounted slide operating members in saidsupport and adapted for independent operation, means for operating said members, and means for connecting the slides to said members.

11 In a machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending forwardly of said tur- 7 ret, a plurality of tool carrying slides mounted on said support, and a plurality of independently operable means within the support for operating said slides.

12. In a machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending forwardly of said turret, one or more tool carrying slides mounted on said support, means withinthe support for operating said slide or slides, and means located back of the turret for operating said means to feed the tools. 7 D

13. In a machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending forwardly of the turret, a plurality of tool carrying slides mounted on said support, a plurality of relatively movable longitudinally reciprocable means in said support, means for connecting the slides to one or the other of said reciprocating means, and means for operating the reciprocating means.

14. In a machine of the class described, a supporting frame, a rotatable spindle carrying turretmounted in said frame, a hollow tool support extending forwardly of the turret, a plurality of tool slides mounted on said support, a plurality of slide operating memhers within said support and adapted for independent operation, means for operating said members, and means whereby the slides may be connected to either member.

15. .In a machine of the class described, a supporting frame, a rotatable spindle carrying turret mounted in said frame, a hollow tool support extending forwardly of the turret, a plurality of tool slides mounted on said support, a plurality of slide operating mem- 1 bers within said support and adapted for independent operation, means for independently operating said members for feeding the tools, and means whereby the slides may be connected to eitherof said members.

16. In a machine of the class described, a frame, a rotatable turretv mounted in the frame, a plurality of work carrying spindles carried bysaid turret, a toolslide carrier ex-. tending through the turret, and supporting means on the frame for both ends of the tool slide carrier on opposite sides of the turret.

17. In a machine of the class described, a rotatable turret, a plurality (if work spindles carried by said turret, a hollow tool support, 130

a plurality of tool slides on said support movable longitudinally of said spindles, means within the support for independently operating said slides, a tool carrying slide operable transversely to the axes of the spindles,

vand means for operating the latter slide independently of the longitudinally movable slides. 7

18.-In a machine of the class described, a plurality of work carrying spindles, aphirality of tool slides, a plurality of cams, a

plurality of operating means operated bythe for driving the operating means.

20. Ina machine of the class described,

rotatable turret, aplurality of work spindles mounted in said turret and positioned about the axis thereof, driving means for said spindles comprising a plurality of driving gears of different diameters coaxially with the turret', a plurality of gears-of different diameters coaxial with the spindles and mounted on axially movable shafts, clutches between the shafts and the spindles, means for shifting the shafts to operate the clutches, and means for causing relative axial movement between the driving gearscand the spindle gears to bring different diameters of gears into mesh to give different rates of rotation to the spindles.

21. In a machine of-the class described, a rotatable turret, a plurality of work spindles mounted in said turret and positioned about the axis thereof, a plurality of driving gears of different diameters mounted coa-xially with the turret, means for driving said gears, a plurality of sets of gears of different diam- Y eters coaxial with the respective spindles and spindles independently.

adapted to mesh with certain of the driving cars, a longitudinally movable shaft upon which each set of gears is mounted, clutch drives between said shafts and the spindles, automatic means for shifting the shafts to operate the clutches, and independent means for shifting each set of spindle gears to bring them into mesh with different driving gears and vary the rate of rotation of the respective 22-. In a machine of the class described, a rotatable turret, a plurality of work spindles carried by said turret, a hollow tool support forwardlyof the turret,'a plurality of tool carrying means movably mounted on the support, driving means for the spindles rearwardly of the turret, said driving means including means for independently varying the rate of rotation of the individual spindles, a plurality of means for independently operating the .tool carrying means located within the support, and means located to the rear of the turret for driving the operating means.

23. In a machine of the class described, a rotatable turret mounted to turn about a horizontal axis, a plurality of work spindles carried by said turret, a, hollow tool support, means forwardly of the turret, driving means .for the spindles rearwardly of the turret,

"connection with said shafts, and coacting cam means carried by said sleeve and flange ar ranged upon rotation of the sleeve to discon nect said clutch connections. a,

25; In a machine of the class described, a

plurality of work spindles, [drive shafts for said spindles, clutch connections between the shafts andspindles, a'bracket, a rotatable sleeve mounted on said bracket, a ring or flange mounted on said sleeve, said shafts extending through said flange and connected thereto, coacting'cam means carried by the flange and sleeve arranged to disconnect said clutch connections upon. rotation of said sleeve, and means for automatically rotating said sleeve at a predetermined time.

26. In a machine of the class described, a work spindle, a drive shaft for said spindle in alignment therewith, a clutch connection between the shaft and spindle, a thrust pin extending longitudinally into the shaft-from the other end thereof, a spring in the shaft reacting against thepin and shaft and tend ing to hold said clutch connection in engagement, a support for the free end of said pin, means for sliding the shaft on said pin to disconnect said clutch connection, and means for driving said shaft.-

27 In a machine of the class described, a

rotatable turret, a plurality of work spindles carried by said turret, an indexing mechanism for said turret, a power drive for said indexing mechanism including a'clutch, autoy matic means connected withthe indexing mechanism'for releasing said'clutch at a pre-' determined point in the cycle of operation, and a manual control for the clutch adapted to release the clutch independentlyof the automatic means. i

28. In a machine of the class described, a. rotatable turret, a plurality of work spindles carried by said turret, one or more tool supports, feeding mechanism for the tool supports, indexing mechanism for the turret, a power drive for said feeding and indexing mechanisms including a clutch automatic means connected with the indexing mechanism to release the clutch at a predetermined point in a cycle of operations, and a manual control for the clutch adapted to release the clutch independently of the automatic means to stop the feed and indexing mechanisms at anypoint in the cycle of operation.

v 29. In a machine of the class described, a rotatable turret, a plurality of work spindles carried by said turret, an automatic indexing mechanism for said turret, one or more tool supports, feeding mechanism for the tool supports, driving means for indexin and feed mechanisms including a clutch, and controlled means for operating said clutch for starting and stopping the feeding and indexing mechanisms at any point in a cycle of operations.

30. "In a machine of'theclass described, a rotatable turret, a plurality of work spindles carried by said turret, a hollow tool support forwardly of the turret, tool carrying means 'movably mounted on the support, driving means for the spindles rearwardly of the turret, said driving means including means for independently varying the rate of rotation of the individual spindles, means for operating the tool carrying means located within the support, and means located to the rear of the turret for driving the operating means.

31. In a machine of the class described, a rotatable turret mounted toturn about a horig zontal axis, a plurality of work spindles car ried by said turret,- a hollow tool support forwardly of the turret, driving means for the spindles rearwardly of the turret, automatic means for indexing the turret, automatic means for disconnecting the spindle driving means during indexing of the turret, tool operating'means within-the support, and driving means for the operating means located to the rear of the turret.

32. In a machine of the class described, a

supporting frame, a rotatable turret mounted in the frame, a plurality of work spindles carried by said turret, a driving shaft for each spindle mounted in the frame in axial alignmanually ment with the spindle, a driving connection between the shaft and spindle adapted to perbetween them,

spindle, a gear on the shaft, and a driving gear meshing therewith.

34:. In a machine of the class described, a supporting frame, a rotatable turret mounted in the frame, a plurality of work spin dles mounted in said turret and positioned about the axis thereof, a driving shaft for each spindle mounted in the frame in axial alignment with the spindle, a detachable clutch driving connection between the shaft and the spindle, driving gears in axial alignment with the turret, and gears on theshafts meshing with the driving gears.

35. In a machine of the class described, a

supporting frame, a rotatable turret mounted in the frame, a plurality of work spindles carried by the turret, driving shafts for the respective spindles mounted in the frame, detachable driving connections between the driving shafts and their corresponding spindles, a'plurality of driving gears of different diameters on a shaft coaxial with the turret, a gear on each drlving shaft meshin with one of said driving gears, means for isconnecting the driving connections between the shafts and the spindles, andmeans for indexing the turret.

36. In a machine of the a supporting frame, a rotatable turret mounted in the frame, a plurality of work class described,

spindles carried by the turret, driving shafts for the spindles mounted in the frame in-axial alignment with the respective spindles, a plu-. rality of driving gears of different diameters mounted on a shaft coaxial with the turret,

gearsv on the drive shafts meshing with the I I driving gears, a detachable clutch driving connection between the respective driving shafts and the corresponding spindles, means for shifting the driving shafts longitudinally to disconnect and connect the clutches, and means for indexing the turret.

In testimpny whereof I aflix my signature.

' ARTHUR J. LEWIS.