US2002186A - End facing and centering machine - Google Patents

Description

May 21, 1935. J. E. LOVELY I END FACING AND CENTERING MACHINE Filed March 24, 1955 9 Sheets-Sheet l y 1935. t .1. E. LOVELY 2,002,186

END FACING AND CENTERING MACHINE Filed March 24, 1955 'QSheetS- Sheet 2 May 21, 1935. J. E. LOVELY END FACING AND CENTERING MACHINE Filed March 24, 1953 9 Sheets-Sheet 3 7 fiw if! W WWMI May 21, 1935. J. E. LOVELY END FACING AND CENTERING MACHINE Filed March 24, 1933 9 Sheets-Sheet 4 I W ZZMZLZZMZ/ May 21, 1935. J. E. LOVELY 2,002,136

' END FACING AND CENTERING MACHINE Fiied-March 24, 1953 e Sheets-Sheet 5 J. E. LOVELY END FACING AND CENTERING MACHINE May 21, 1935.

9 Sheets-Shet 6 Filed March 24, 1955 L dd 1 EH gv I v Ea @7/ n Q .7/ 1 JM.. y V/ 1 x 1 J III/III! May 21, 1935.

J. E. LOVELY END FACING AND CENTERING MACHINE Filed March 24, 1935 9 Sheets-Sheet 7 J. E. LOVELY END FACING AND CENTERING MACHINE Filed March 24, 1933 9 Sheets-Sheet 8 May 21, 1935.

J. E. LOVELY END FACING AND CENTERING MACHINE Filed March 24, 1933 9 Sheets-Sheet 9 vPatented May 2 1, 1935 meme AN oENrEarNG John E. Lovely, Springfield, Vt assig'ncr teJones &-Lamson Machine Company, Springfield' -Vt, a corporation of Vermont Application. March zaieeaser'iai listene momma.

This invention has foran objec t to provide a machine for end facing and centering the ends of shafts, bar stock and the like preparatory to turning the work as automatic,lathe;v To this end ;n1eansare;; provided for holding" the workand .whilelit is so held to face off itsendstq;;c x act, length and then to center drill to" a uniform depth, these operations being automat-- ically effected. j i

For a; more. complete understanding ,5: this invention, reference may behad to the accompanying drawings, in which; t Figure l is a front elevation of 1 the machine, Figure 2 is a top plan of the same, I Figure; 3 is a tail stool; end elevation. Figure 14 is a detail section on the line 4-4 of Figure-1. 4 a

Figure 5 -is a fragmentary rear elevation showing a. portion of the work head-spacing mechan1sm.: J

Figured isa detail section on the line 6-6 of Figure 5. l

Figure 7 is a detail section on the line 'I- lof Figures'l and 10.

Figure 8 is a vertical section on the line; 88 of Figureyl. e

, Figure 9 is a detail section onthe line 99 of Figure 7. l 3 g Figure 10 is a longitudinal section on .line

Figure 10a is a detail section completing the section of Figure 10. i l .w

Figurell is a detail vertical section on line ll'il of Figure 8.- 1 1 Figures 12 and-13am detail sections on the correspondingly numbered section-lines of Figure3. A

Figure 14 is a fragmentary rear elevationof the head stock end of the machine- Figure 15 is a head stock end elevation. I Figure lfi is a trans'versesectionto a larger scale than Figure 4' shcwing the work gripping mechanism; r l

t Figure 1'? is a de Figure 16. t .1 I I U 1 Figure 18, isa diagrammatic detail of a. portionof the speedchanging mechanism within the. head stock. i l, v As shown the machine comprises a base I. hav ing ahead stock portion 2 and a tail stock-portion 3 upstanding therefrom. Between'these head and tail stocks is movably mounted a work carrier 4 which, as shown, is in two parts each carried by a rockable bar 5 journalled at opposite ends in the lower portions of the head and 1 tail stocks: and held against endwise movement by stop collars. id at: opposite ends. Both the head and. the tail stocks carry end .facmg tools shown as end mills Band I; and center drills 8 and}, and the 'workholde r ismanipulated to present theworkiin succession to. the end facing tools to rhe cut. off by them to exact predetermined lengthaandjto face, the ends of the work, and then m ne center which are actuated to. center the, faced work; In order that theYworlr', may, faced to. adjustable predemrmined length proyision isfmade by which the of the head and tail stocks. maybe adiusted; To.thislend thejtail stock is slidably supported .oniways ifl 'onthebase i, as shown bstin FigureB and. for the." purpose of effectin such. adjn'stmeht a bracket 1 i. (seeFigure 5) is securedtq thejtail stock as by bolts l2 and has a depending "threaded-sleeve; portion 13 at its lower-end through lwhich is, threaded an adjust: irig screw (4. This adjusting screw is shown as enclosed withinla'housing 15 (see Figure 2) extending, along therear sideof the base I, the screw being jourfialled brackets i6 and IT secured to the base i. The tail stock end of the screw. l 4 'is pr'oyided, with a reduced squared extremity l8 to which mayheuapplied when desired. a'crank memheijl 9 (see Figure 2) by which thisiscrew may beiturned to thus adjust the position of-thetail stool; along the bed.

is" Facing tool mounting The end tools shown as the mills 6 and I arefixdtoshafts-or spindles 30 and. 3| respectiyely in the head and tail stocks, these being v in spacedaxial. alignment, each mill itself being carried b'ya suitable tool holder 32 carried by its respectiye shaft,v as shown inFigures 11 and 12. To this shaft 3111 is kjeyed a gear. 33 (see Figure 11 w ithl which meshes a pinion- 34 .on a shaft .35 seel ig'ures 8 and LO) arranged in the headstock in parallel re-ma aw the shaft 30.. This shaft 35jas shown. best iii ifiigtlre 10; also has keyed theretoa geari3iwith which meshes a pinion 3'1 ona shaft 38 also parallelwith the shaft 35 and the tool; spindle 3U'.'f shaft 38, as will'later appear more in detail, is connected through to the tail stock for driving the opposite'end mill 1 and also the cememrmxs, This shaft 30 may be driven at any one of three speed ratios from a shaft '41 arranged parallel therewith,'and which is the main drive shaft of the machine. This shaft M! has slidably keyed thereon the gearsleeve H which has three gear portions 42, 43, and 44, whichmay be selectively meshed with the gears 45, 46 and 41 keyed to the shaft 38. The gear sleeve 4| may be moved to any of its operative positions by a gear shifting fork 49 riding in a groove 49 therein, this gear shifting fork, as shown best in Figure 18, being carried at the extremity of an arm 59 secured to a rock shaft 5| which extends transversely of the axis of the shaft 99 and extends out through the forward face of the head stock housing 52. It has secured on its outer end an actuating lever 53 provided with a detent handle 54 which maybe engaged in any one of three recesses 55 in can arcu ate member 56 secured tothe forward face of the-head stock housing, as shown best in Figure 1 to hold the screw M in any selected of its three operative positions. j

Outwardly of the head stockhousing this shaft 49 has journalled thereon a drivepulley 60 which may be clutched to the shaft 49 as by means of a ring friction clutch mechanism indicated generally at 6!. within the hub 62 of the pulley. This friction clutchmay be actuated to clutch or un-, clutch the pulley 69 to the shaft 49 by axial motion of a rod 63 slidable axially within the shaft 49 and which is provided with-a recess 64 into which clutch actuating dogs 65 extend. On the inner end of the ba'r63 is journalled a sleeve 6'! provided along one side with suitable rack teeth (see Figures 7 and 9) with which meshes a muti' lated pinion 68 secured to a rock shaft 59. This rock shaft extends laterally through thehead stock casing 52 and on its rear face has secured thereto a forked arm I9 which is connected through a pin 'II to a block I2 (see Figure2) adjustably connected to a rod I3 which forms part of the automatic stop mechanismof the machine asrwill later appear. A spring 'I5s ecured at one end to the block I2 is secured at its other end as at I6 to the headstock casing 52 and tends to move the clutch. rod 63 into clutch released position. As shown best in Figure 14, the opposite end of the rod 'I3 is pivoted to a brakepa'ctuatingarm 89 which isj'connected to a hand brake 8i surrounding a brake drum 82.. This drum is secured to a shaft 83 which is driven from'the shaft 49 through intermeshing bevel gears-'85 and 86 on the shaft 83 and the shaft'49 respectively within the head stock casing 52; The forward end of the rock shaft 59' has secured thereto a clutch actuating lever 99. by which the stopping and starting of the machine may be manually controlled. Means are also provided which will the same direction, as shown in Figure 12." To

this spindle BI is keyed agear 92 withiwhich meshes apinion 93 (see Figures 3 and 13 on a stub shaft 99'. Keyed to this stub shaft is a gear 95 which meshes witha pinion 96 on a sleeve 91' journalled forrotation and through which extends a shaft 98 which forms a continuation of the shaft 38 in the head stock and which is cou pled thereto'by a coupling 99. a

Work center drilling mechanism The center drill 8v at the head stock end of the machine, as bestshownin Figure 11, is carried by a spindle I99 rotatably mounted in sets of ball bearings I9I in a sleeve I92 which is mounted for axial movement so as to move the spindle I99 axially therewith. Splined to the spindle I99 at its opposite end is a sleeve I 93 which has fixed to or integral therewith a pinion I94 with which meshes a gear !95 (see Figure 10) keyed to the rear end of the shaft 35 and by this geared connection the spindle I99 is rotated. The rear end of the spindle I99 is shown as threaded at I95 and on this threaded portion is shown in Figure 11 a split stop collar I91. This collar may be clamped in any adjusted position on the threaded portion I96 as by means of the clamp screw I98 and limits the axial motion of the spindle I99 in drill feeding direction. Axial motion of the sleeve I92 which produces similar motion of the center drill 8 soas to feed the center drill into the work and then retract it from the work is produced by the rocking of 'a rock shaft I I9 which has clamped thereto a gear segment I I I having teeth meshing with rack teeth I I2 in the sleeve I92. Also meshing with the segment I I I is a similar but shorter segment IE3 carried by a rock shaft II 4. This rock shaft I I4 has clamped thereto an actuating ar'mI I5 on the outside of the machine as shown in Figure l, tothe lower end of which is pivotally connected as at IIEi-a rod II! which extends to-- ward' 'the tail stock end of the machine where it is pivotaily connected as at H8 with an arm II9 carried by a transverse rock shaft I29 (see Figures 1 and '3). This'shaft I29 also has fixed thereon a cam follower arm l2I which has at its upper end a follower roll I22 for cooperation with cams I23 and I29 on a cam drum I25; This cam drum is secured to a cam shaft I 26 which extends lengthwise of the machine beneath the head and tail stocks and carries a cam drum I2! beneath the head stock by which various other machine controls are effected as will later appear.

The tail stock center drill 9, as shown best in Figure 12, is carried by a spindle I39 quite similar to the spindle I99 and which is mounted in ball bearings i 3! in a sleeve 332. This sleeve is also mounted for axial sliding motion and this is effected by rocking of a segment 533 carried by a rock shaft I34, the segment having teeth meshing with rack teeth I 35 in the sleeve I 32. On the rear end of the spindle I39 is mounted a stop collar I36 similar to the stop collar I91 on thespindle I99. 'Therock shaft I39 extends at one end outwardly of the machine casing as shown in Figure 1" and has secured thereto an arm I3? which is pivotally and adjustably connected at I38 with a rod I39 which is pivoted at the head stock end of the machine as at I49 to the arm II5. In order topermit suitable lengthwise adjustment of the arm I3! to the rod I39, this rod is shown as slotted at I42 to take thepivotal connection I38. This rod is also provided with an adjusting turnbuckle I43, the rod itself comprising endwise positioned portions connected together by this turnbuckle in order to provide for minor length adjustments as may be found necessary. With this interconnection between the two spindles, the center drills 8 and 9 are moved simultaneously toward and then from each other to center drill opposite ends of the work and then retract therefrom, the stop collars ensuring that the center drilling is effected to a uniform depth at each actuation.

" The spindle I39 is slidably keyed within a sleeve I59 (see Figure 12) which is journalled in the machine frame in ball bearings I5! and this sleeve carries or has formed integral therewith a pinion I52. With this pinion meshes a gear I53 on a shaft I54 (see Figure 13) journalled in the ball bearings I55 and I55, and to this shaft I54 is keyed a gear I51 with which meshes a gear I58 keyed to the shaft 94 which, as previously deoo les scribed, is driven from th-hadstockthrdxighthe shaft 9 8. The! drill 9 isthus drfieninthd reverse-1 direction to the drill" & since it is driven. through;

the twointermediateshafts 54 sndlfl from the drive shaft sd -whilethe drllla-is-dri'ven mull-the? standard one of each is used forthe-end fa'cil'rg tools, these tools being driven in tion as previouslydescribedi i As previously pointed out the workholderlis the same -direce made in two identical:parts both. carrled by a rock shaft 5.

This permits; spacing adjustment to suit thev spacing between headand' tail stocks, the work being grasped adjacent togeach end. Each workholder partyias shown best 'm Figuresfand. 16', is provided 'with a: pairl of aligned slides-H and Ll'hmountedfor movement transversely of "the l-axis of :the rock shaft and connected together for simultaneous motion by means of a double end'ed screw "2 passing therethrough; opposite endlportions of this rod" being reversely threaded a and carrying thereon. nuts H3 and Lurespctively, whichlare suitably. sea Cl'lI'Cd'llIl the .end portions of the slides H?!- H l .1 Oppositereduced. extremitiesfof. the shaft H2 are journalled in bearings H5 and t'ttre- I spectively, secured-toioppositeendsj of the car-l riage lies by-the bolts H1 "and t:l8."==vAs'shown-i, thecbearing l lfi formstpart ofva support for a I torquemotor- I19 the shaft)! of whichisinounted transversely tolthe shaft l'lta'nd carries there on. a worm I81 meshingswitheai worm gear [82 which is journalledfonaxstubshaft. I83 in axial alignment with the screwtl'ltznr'lhis. worm gear I182 has pinned theretogaclutch element thaw. ing teeth meshing with a clutch element. I85

mounted on. thepsquared-extremity llk of the shaft I I2. -Thisconstruction-permits; the shaft H2 1 to be rotated: by the torquegmotor when desired, or'by removing the bearing member "8 with the torque motorand 'theaworm wheel 182 and ,thenremoving the. clutch element 185, the squared extremity of the shaft H Zis exposed for engagement therewith of ethanol crank-by which the shaft I12; may berotated; Eachpf'theslides 170 and ill carriesasuitablework.grippingjaw such as lsll and I91nforgrasping'the work adjacent toan endleaving the: end face'of .the work freetobe faced-offend centendrilled; Orient these jaws such as I90 is shown as: provided with a :single v shaped member which" may pass be-E tween spaced v-shaped-member'sof 'the other jaw I91, as shown bestinFiguresfl and 4, thus: to'

permit the engagement'of various sized pieces of work 2001therebetween -these parts lapping past each other When-the work is of small diam I eter as shownin Figure 4, large diameter-work being shownin Figure 16.; Where torque motorswork between these tools sodas to face ofi both ends of, the work and. reduce it to a predetermined length. After this is accomplished, the

workholder is manipulated to present the work. between the center drills 8- and 9 and there hold it whileathe. center drills are caused: to center the endsofthe work andretract. therefrom, whereupon 'the, work maybe released anda new piece inserted; Thismotionofp the workholder is shown as produced by a pair of former cams 285 (see Figures 1, 4 and 3) which are secured to a car-- riage 2&6 mounted to. slide on a track member 20? (seeFigure. 4) as secured to the forwardface of the bed I as by a pivot 208. It may be adjusted for elevation at opposite ends and thus'angularly above its pivot bymeans of screws 209 threaded into its This track member is shown lowerfaceand bearing on .a. horizontal shoulder or ledge 2l0 extending outwardly from the base portion of the machine. These former cams 205 cooperate with cam followers 2 l2 suitably secured toithe forward ends of the carriage parts l and the former cams 205 have inclined faces so that by moving'the carriage 206 axially theforward end of the carriage partz'4 is positively moved upwardly or allowed to descendby gravity, the followers 2l2riding on the faces of the former cams 205. The carriage 208 is reciprocated in proper timed relation toperform the machine cycle and'for this purpose it has pivoted at its head stock end thereto at H5 2.; rod 2l6 secured to a. slidable block 2!! which carries a suitable cam follower 218 with which cooperate cams 2l9 and 220 fixed to the cam'drum I21. Means are provided by which the initial motion of the workholder' to present the work too the end facing tools is accomplished. quickly whereupon the motion isjslowed' while the work is being carried betweenthe facing toolsp When this has been completed, the work is returned with fast motion to a position opposite to the centering drills where it is held stationary during the center drilling operation and while the work is released and new .work placed in position; After the drilling 'operation'is completed the machine is automatically stopped. To these ends a two speed drive for the cam shaft l26fis provided, this two speed mechanism being controlledby cams on the drum 121, other cam mechanism carried by the cam shaft 0.26 also serving to automatically stop the machinezat the end ofgitscycle of-operations.

The cam-drum [2.1 has secured thereto a worm wheel 238 (see Figure 8) with which meshes a worm. 23'] on a transverse cam drive shaft 232. One end portion of this shaft 232 has journalled thereon alsleeve 233 which carries a bevel gear 234 meshing with a. similar bevel gear 235 on the lower end of a vertical jack shaft 236. The upper endofthis shaft 236 has secured thereto a. bevel gear 231, which meshes with the bevel gear 238 on the shaft '83.:- This jack shaft 236 constitutes the high speeddrive shaft and; the sleeve 234 driven thereby is arranged to be selectlvely clutched to the cam drive shaft 232 throughthenmultiple ring clutch shownat 240.

This clutching and unclutching is effected by axial motionofthe" clutch collar 24!. This clutch collar is moved by a suitable clutch actuating fork 242 which, as shown in Figure 14, is carried by a. rock shaft 243. This rock shaft has secured thereto an arm 2 which is connected through a link 245 to a rod 246 (see Figure 15). This in turnis connected to an arm 24! secured to apvertical rock shaft 248ig-tothe upper end of which is secured "an arm 249 having a cam follower 250 thereon with which cooperates suitable cams (not shown) on the drum I21, it be,- ing understood that these cams are so arranged as to actuate the clutch to couple the high speed drive shaft 236 .to drivev the drum during the fast motion portions of the work carriage'movement and to unclutch this connection during'theslow speed portions of the work carriage movement. When the high speed clutch is .unclutched the cam drive shaft 232 is driven at a slower speed through connections at its opposite end. As shown in Figure 8 these comprise a gear 255 journalled on the shaft. 232 and connected through an overrunning clutch mechanism of any suitable type at 256 therewith so that the shaft 232 can run ahead of the rotation of the gear l55 when driven by the high speed mechanism, but is automatically clutched to-be driven by the slow speed drive when the high speed drive isunclutched therefrom. This gear 255 is in mesh with a bevel pinion 25? fixed to a vertical jack shaft 258 on the oppositeside of the machine to the high speed jack shaft 236.

To the upper end of thisshaft 253 is keyed a stub shaft 259 which hask'eyed thereto one of a pair of change gears 2653 housed within achange gear box 265. This change gear 260 meshes with another change gear 262 on'a vertical shaft 263 which also has keyed thereto a bevel gear 264 which meshes with a gear 255 (see Figure 10) on a shaft 256. This shaft in turn carries the bevel 'gear'26l with which meshes a bevel gear 268 fixed to'the shaft 35. The gears 25! and 262 being change gears are mounted so that they may be removed and ,intermeshing gears'o-f different relative sizes substituted therefor in order to predetermine the rate of the slow speed. For thispurpose the shafts 259 and 253 may be lifted to raise the change gears out of the box 26L be thrown from high into low speed or viceversa'by'means of the handle 269 secured to the member 249. This drive for the cam drums is similarto that fully described in my Patent No.

' 1,923,493, for Lathe granted August 22, 1933.

- The automatic stopping of the machine is also controlled by suitable cams on the drum I21 through an arm 210 (see Figure 15) pivoted at 2' at the head stock end of the machine, and which carries a cam follower2'l2. To'the outer end of this arm 218 is pivoted at 213 the lower end of a, link 214 the upper end of which is pivoted at 275 to an arm 216 fixed toa rock shaft 271. This rock shaft 21! extends along the forward face of the head stock casing and remote from the arm 216 it carries a crank arm 218 which is connected through a link 219 with an arm 28ii'on horizontal rock shaft 23!. This rock shaft carries an arm 282 provided with a latch lug with which cooperatesa latch 284-c'ar-' ried by the starting lever 90. The latch 284, is spring pressed in a'well-known manner so that when-the lug 283 is in raised position the lever 90 may be thrown past the latch lug to start the machine and will be retained in machine operating position by engagement of the latch 284 on the lug 283 until such time as the end of machine operation has been reached whereupon the stop' cams on the drum 1 21 will through the connections described rock the lug'283 out of engagement with the latch 284, releasing the handle 98 whereupon the spring 13 will disconnect the main driving clutch and apply the brake as has heretofore been described. :The rock shaft 28i has a handle 285 by which it may be turned by hand to trip the handle 90 and stop the machine.

The mechanism may The high speed-jack shaft 236 may also be employed to drive the coolant pump, connection for this being shown in Figure 14 where the bevel gear 235 is shown as meshing with a bevel gear 29Bon the pump shaft 29!, the pump being indi cated at 292, the intake pipe 293 for which extends into the sump 294.

From the-foregoing description of an embodiment of this invention it should be evident to those skilled in the art that various changes and modifications might be made without departing from the spirit or scope of this inventionas defined by the appended claims.

I claim:

1. A machine for preparing work to be turned between centers, comprising a pair of spaced rotary end facing tools, a pair of oppositely disposed center drills in fixed transverse relation to said tools, a movable work carriage, means on said carriage to grip work, means for moving said carriage to pass work thereon between said facing-tools to face offthe ends of the work and reduce it to a predetermined length and then to present the work between said drills, means for then I actuating said drills to center drill the work, .and mechanism for automatically actuating said'means in timed relation.

.2- A machine for preparing work to be turned between centers, comprising two pairs of rotary spindles, the spindles of each pair being in' spaced axial alignment, end mills carried by the adjacent endsof the spindles of one pair, opposed centering drills carried by each spindle of the other pair, a workholder, means for moving said workholder to move the work laterally of said spindles between said end mills to face 01f the endsrof the work and to reduce it to a predetermined length and then to present the work between said drills, means acting to move said drill spindles axially towardand then from each other to center drill the work in said faced ends and thento retract therefrom, and mechanism forautomatically actuating said means in timed relation.

3. A machine for preparing work to be turned between centers, comprising two pairs of rotary spindles, the spindles of each pair being in spaced axial alignment, end mills carried by the adjacentends of the spindles of one pair, opposed cente ring drills carried by the adjacent ends'of the spindles of the other pair, a work carriage rockable'about an axis parallel to said spindles, means on said carriage to grasp work, means for rocking said carriage to pass work carried thereby between said mills to face off the ends of the work and to reduce it to one predetermined dimension and then to present the work between said drills,.and means acting to feed said drills toward and from each other to center drill said ends and then retract therefrom.

44'. A machine for preparing work to be turned between centers, comprising a pair of spaced end facing tools, a pair of oppositely disposed center drills, a movable work carriage, means on said carriage to grip work, means for moving said carriage to pass work thereon between said facing tools to face off the ends of the work and reduce it to a predetermined length and then to present the work between center drills, means for then actuating said drills to center drill the work, a cam shaft, and cams on said shaft for controlling said carriage moving and said drill actuating means.

5. A machine for preparing work to be turned between centers, comprising a pair of end facing tools spaced apart the desired length of the work, a pair of oppositely disposed center drills, a workholder, means for moving said holder to bring work thereon up to said tools under fast motion,

to pass the work between said tools to face off its ends under slow motion, then under fast motion to present the work between said drills and there to hold it, and means for then actuating said drills to center drill said work ends.

6. A machine for preparing work to be turned between centers, comprising a pair of end facing tools spaced apart the desired length of the work, a pair of oppositely disposed centering drills, a workholder pivotally mounted on an axis parallel to those of saiddrills, a former cam movable substantially parallel to said axis for controlling the angular position of said holder, a cam shaft, cams on said shaft for controlling and moving said former cam to cause work on said holder to be passed between said facing tools to face the ends of the work and to reduce it to a predetermined length, and then to present the work between said drills, and cams on said shaft for causing said drills to center drill said work ends and then to retract therefrom.

'7. A machine for preparing work to be turned between centers, having head and tail stocks, means for adjusting the spacing of said stocks, a rotary end facing tool and a center drill carried by each stock, means for rotating said tools and drills, a workholder having work grasping portions spaced adjustably lengthwise of the work, and means for automatically moving said workholder to present the work successively into operative relation to said tools and drills and to feed said drills toward and from work held by said grasping portions.

8. A machine for preparing work to be turned between centers, having head and tail stocks, ro-

tary end mills carried by said stocks, opposed cen-' ter drills carried by said stocks, means for passing work between said mills to face off the ends of said Work and reduce it to a predetermined length,

.mill and. drill driving means in said head stock, and connections extending between said stocks for driving said tail stock mill and drill from said mill anddrill driving means.

9. Ina machine of the class described, a work carriage, opposed work gripping means movable on said carriage from and toward each other, and a torque motor for movingsaid gripping means simultaneously toward or from each other.

10. A machine of the class described comprising a pair of end facing tools spaced apart the desired length of the work, a work holder pivotally mounted on an axis substantially parallel to the line of spacing of said tools, a former cam movable substantially parallel to said axis for controlling the angular position of said holder, a cam shaft, and cams on said shaft for controlling and moving said former cam to cause work on said holder to be passed between said facing tools to face the ends of the work to said desired length.

11. A machine for preparing work to be turned between centers, comprising a work holder, oppositely disposed spaced center drills, a drive shaft, connections from said shaft to said drills for driving said drills simultaneously in opposite directions, means for moving said drills axially from and toward each other to center-drill opposite ends of the work and to retract therefrom, and means for relatively moving said drills and work holder laterally of the work axis to present and remove work to and from axial alinement with said drills.

12. A machine for preparing work to be turned between centers, comprising two pairs of rotary spindles, the spindles of each pair being in spaced axial alinement, rotary end cutting tools carried by the adjacent ends of the spindles of one pair, opposed centering drills carried by each spindle of the otherpair, a drive shaft, connections from said shaft for driving all of said spindles including reverse direction connections for said center drill spindles, a work holder, and'means for relatively moving said holder and spindles to first face off the ends of work carried by said holder, and then to center-drill the ends of the work.

13. A machine for preparing work to be turned between centers, comprising a pair of heads, a pair of spindles journaled in each head in fixed relation, a rotary cutting off tool carried by one of said spindles in each head, a center drill carried by the other of said spindles in eachhead, the two drills being in axial alinement, a driving shaft extending between said heads, driving connections from said driving shaft tosaid spindles including reverse rotation connections to said drills whereby one is rotated in the opposite direction to the other, a work holder, means for moving said holder to first present work between said cutting off tools to reduce the work to a predetermined length and then to present the work in operative relation to said drills, and means for then moving said drills axially to center-drill opposite ends of the work.

14. A machine for preparing work to be turned between centers, comprising a pair of end facing tools spaced apart the desired length of the work, a pair of oppositely disposed center drills, a

work holder, means for moving said holder to bring work thereon up to and between said end facing tools to face off said ends and then between said drills and there hold it, means for then actuating said drills to center-drill said work ends and retract therefrom, and means for then automatically stopping the machine.

' JOHN E. LOVELY.

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