US1504133A - Grooving attachment for lathes - Google Patents

Description

Aug. 5 1924.

0-. w. MUELLER GRODVINCT ATTACEMENT FOR LATHES File Apr l '28. 1923 5 Sheets-Sheet 1 I 721/6112 or.-

o. w MUELLER GROOVING ATTACHMENT FOR LATHES Filed April 28. 1923 5 Sheets-Sheet 2 O. W. MUELLER GROOVING ATTACHMENT FOR LATHES Filed April 28 1923 5 Sheets-Sheet 5 l v I VII 0. W. MUELLER GROOVING ATTACHMENT FOR LATHES Filed April. 28 1923 5 Sheets-Sheet 4 Im' M,

Aug. 5 1924. v 7 1,504,133

0. W. MUELLER GROOVING ATTACHMENT FOR LATHEs Filed April 28 1923 5 Sheets-Sheet 5 @awjrwiio Patented Aug. 5, 1924.

UNHTE STATES OSCAR w. MUELLER,

F CINCINNATI, OHIO, ASSIGNOR TO THE 'MUELLER MACHINE TOOL COMPANY,OF' CINCINNATI, OHIO, A CORPORATION OF OHIO.

GROOVING ATTACHIVIENT FOR LATHES.

Application filednpril 28, 1923. Qerial No; 635,356. r

I To all whomt may concern:

Be it known that I, OSCAR W. MUELLER,

a citizen of the United States, residing at Cincinnati, in the county of Hamilton and ,State of Ohio, have invented certain new and useful Improvements in Grooving Attachments for Lathes, ofwhich the following is a specification.

.It is a practice to provide journalswith external grooves, and bearingswith internal grooves, to form oil channels along which, ollmay flow in order to uniformly 011 the journals and bearings throughout their lengths. providing grooves'employable .for this purpose. It is the object of my invention to provide a novel attachment for a metal turninglatho comprising means whereby reciprocations lo lengthwise of the-axls ofthe rotated work are imparted to a tool mounted onthe crossslide of the lathe, in order toprovlde the work with a groove extending about the aXis of the work; further, to provide novel means whereby such reciprocations may be parallel with the axis of the work or at an angle with relation to such axis; further,'to provide supporting means for the tool and means for attachingthe same to the crossslide of a lathe, and driving means for reciprocating the tool and means for attaching the same'to the carriage. of the lathe: further, to provide novel driving means for said tool comprising.a -gear-.

housing on the rear of the carriage, and a shiftable driving connection between the gear-housing and a reciprocable tool-part further, to provide such last-named shiftable driving connection with novel means; whereby the tool-part may be reciprocated at an angle to the axis of rotation of the work; further, to provide novel means; in the tapered inner periphery of a piece whereby to mount the tool; further, to provide novel means whereby" crosslng grooves may be cut into the Work; andyfurther, to. provide novel tool means whereby grooves may be cut into theouter periphery or the inner periphery of work. I

The invention will be further readily un-.

derstood from the following description and claims, and .fromthe drawmgs, in winchlatter Fig. 1 is a front elevationsof a .latherhave. invention applied thereto, partly ing I my broken away.

My invention is applicable for Fig. 2 is a plan view of a portion of the same, partly broken away, and with the cover of the gearbox removed for better illustration of the parts.

Fig. 3- is a vertical cross-section of the same, taken on the line 3-3 of Fig. 2.

Fig. 4 is a vertical cross-section of the same, taken on the irregular line ill of Fig. 2.

Fig. 5 is a cross-section of thesame, taken r on the irregular line 55 of Fig. 2.

Fig. 6 is a longitudinalsection of the same, taken on the irregular line 66 of Fig. 8.

Fig. 7 is a longitudinal section of the same, taken in the plane of the line 7.7 of Fig. 4. a Fig. 8 is a longitudinal section of the same, taken on the irregular line 8-8 of Fig. 2, but showing a plurality of.cutters differently arranged.

Fig. 9 is a side elevation of the tool-rod, partly broken away and partly in axial section, showing the same arranged for receiving a tool at each end thereof, one of the tools being applied directly tothe tool-rod.

Fig. 10 is a detail taken in cross-section in the plane of the line 1010.of Fig. 4;.

Fig. 11 is a plan viewbf exemplifying crossing grooves arranged to be out upon the outerperiphery of a shaft by means of my improved device, the same being laid out in plane, and one of the grooves shown in full lines and the other shown in dotted lines.

Fig. 12 is a plan view of my improved device, with lathe parts partly broken away, showing my improved device arranged for cutting a groove in the outer periphery of a piece,of work held in the chuck of the lathehead; and,

Fig. 13 is a similar view of the same, with the tool arranged for cutting an oil-groove of work The lathe to which my improved attachment is applied may be any metal turning lathe of usual construction and comprise a usual bed 21 having ways 22, 23,, thereon, on which a usual carriage 24: isv arranged to be suitably fed lengthwise of the bed. A usual cross-slide 25 is mounted on the carriage and is guided crosswise of the bed by a guide 26 on the carriage.

The work is received either between the head-center 31 and the tail-center 32, or is suitably secured to the head-chuck 33 secured to the head-spindle. The head-spindle or quill is driven in usual manner, for instance, by means of pulleys 34.

The work is represented as a shaft 35 in Figs. 1, 2, 3 and 4, the outer peripheries of the journal portions 36, 37, of which are exemplified as having grooves cut therein; as a stud 38 in Fig. 12, the outer periphery of which is receiving a groove; and as a taper-bearing 39 in Fig. 13, the inner periphery of which is receiving a groove. Feed lengthwise of the bed is imparted to the carriage in usual manner in order to position the carriage with the attachment mounted thereon in proper location for op erating on the work. This lateral adjustv ment may be effected by the usual leadscrew 41, operated in usual manner, for instance, by a system of gearing 42 and speed changing mechanism in a speed change box 43, the control handles of which are exemplified at 44, 45, for controlling the speeds of the lead-screw. The lateral positioning of the carriage may also be accomplished by means of a usual rack 46 and a usual pinion 47 rotated by a suitable hand-wheel 48.

If the work is a shaft or other piece located between the centers of the lathe, the same may be attached to the head-spind1e by means of a usual lathe dog 51 in which one end of the shaft is clamped by a setbolt 52, the dog having an arm 53 received in one of the slots 54 of the head-plate 55.

If the work is a stud, bearing or other short piece, the same may be clamped to the head-spindle by means of the usual clamping jaws 58 of the usual head-chuck 33, "for clamping and centering the piece of work so that its axis is coincident with the axis of rotation of the rotated spindle.

I have exemplified the cutting tool and its mounting on the cross-slide, and the housing which supports the reciprocating means for the cutting tool as mounted on the rear of the carriage. I

The cutter mounting is suitably supported on the cross-slide and is arranged to have cross-feeding movements imparted thereto, and is preferably set at various angles with relation to the axis of the work so .as to operate upon tapered peripheries as well as peripheries which are parallel with the axis of the work.

I have exemplified the mounting for the cutting tool as comprising a saddle 61, secured to the tool-slide 62 of the lathe, which serves as a cross-slide, shown adjustable by means of a teed-screw 64 operating in a nut 65 secured to the swivel-block 66 of the lathe. There is a guide 63 between the toolslide and the swivel-block. The swivel- ,block is rotata le on a vertical axis about a stud 67, a usual index 68 indicating the also arranged for being,

degree of angular adjustment of the swivelblock, "the swivel-block being clamped to the cross-slide 25 after adjustment by means of usual T-bolts 69, the heads of which are received in 'T-slots 70, nuts 71 clamping the parts together.

of the tool-slide and being provided with a slot- 7 8 and a clamping bolt 79. The saddle. is provided with a tongue 81 extending crosswise of the saddle and received in the upper portion of a T-slot 77 for normally positioning the saddle at right angles to the tool-slide. The saddle is provided with a hole 82 through which the tool-post protrudes. A clamp-bar 83 is received through the slot 78, the ends of the bar impinging the wall of the hole 82 at the respective sides of the tool-post, the clamp-bolt 79 exerting clamping force upon the bar to rigidly fix the saddle to the cross-slide.

A reciprocating tool-support 85 is sup-- ported on the saddle. Bars 86, 87, are respectively supported in bearings 88, 89, ot the saddle. These bearings are shown located in bearing- blocks 90, 91. The bearing blocks are adjustable up and down on the saddle on guide-faces 92, 93, and are clamped in adjusted positions by means of clamp- bolts 94, 95, received through slots 96 in the respective ends of the saddle, the bolts being threaded into the bearing-blocks tor clamping the bearing-blocks in adjusted positions to the' saddle. The bearings 89 are exemplified as clamp-bearings clamping the bar 87 to the saddle by means of clamp-bolts 97. a

A cross-head 101 has bearings 102, 103, therein, received about the respective bars: 86, 87, the bearing 102 being shown as a clamp-bearing for clamping the bar 88 therein by means of a clamp-bolt 104. In this form the cross-head and the bar 86 form the'tool-support. The bar 86 is arranged to reciprocate in the bearings 88, and the bearing 103 in the cross-head is arranged to reciprocate on the bar 87 fixed in the bearings 89. The arrangement provides guided movement in widely spaced bearings for the bar 86, which is exemplified as the tool-bar, for providing a firm support for the tool and preventing chattering in the cutting operation and insuring a smoothly cut groove. 1

The tools may be variously supported. Thus I have in Figs. 1, 2, 6 and 8, exemplified a tool 111 secured in a nose 112 of a tool-block 113 by means of a set-bolt 114. The tool-block is provided with bearings 115, 116, about the bars 86, 87 the bearing for piece of work and the toolbar is-providedfor the crank mechanism for reciprocating the tool, as hereinafter described;

I have further exemplified the bar 86 as provided with a socket 119, in which a'tool 120 is arranged to be received, this toolbeing exemplified as a double edged tool, having a cuttingedge at each end thereof. The

tool is clamped in the socket by means of a set-screw 121, threadedinto the outer end of the bar.

The bar 86 is at' its other end provided with a taper socket125, in which the taper shank 126 of a supplemental tool-bar 127 is arranged to be received and secured. The supplemental tool-bar is provided with a tool-socket 128, aset-screw 129 securing the tool 130 in its socket. The supplemental tool-bars are especially useful for operating upon the inner peripheries of bearings, either straight or tapered, and supplemental tool-bars of various diameters andtools130 of various lengths are provided, for being readily received into boresof different diameters, one of which is shown at 131 in the bearing 39. The smaller the bore the less will be the diameter of the supplemental tool-bar and the length of the tool, the taper shanks thereof, however, beingthe same for being interchangeably received in the taper socket 125. The tool-bar may be provided with a suitable drift slot 133 for ejecting the the supplemental tool-bar by means of a suitable wedge.

The tool-bar may be placed in its bearing with either end thereof extending toward the head-stock of the lathe, and the too-lblock 113 may be secured at any point in the length of said tool-bar, depending on the location at which the grooves are to be cut.

The cross-head is provided with a' guideway 137 in which a crank-block 138 reciprocates. A crank-pin 139 is received in the crank-block and in a crank-arm 140 on a crank-shaft 141. The connection between the crank-pin and the crank-block is preferably a universal connection, comprising aball 142 fixed to the crank-pin and" located in a socket 143, the wall of which partially surrounds the ball so as to maintainthe ball in the socket during axial Stl'ELlIlS on. the

crank-pin. The crank-block has tongues144 at its side edges, received in undercut grooves 145 in the guideway ofv the crosshead, formaintaining the block in. the groove during axial strains on the crankpinwhich is fixed in the crank-arm. The crank-block ismadeof two parts, in each of which partof the socket 143 is located, the parts being connected by screws 146'to inclose the ball, which has universal movement therein.

The crank-armis adjustable in its shaft so as to adjust the distance between the axis of the shaft and the axis of the craiik pin, thereby adjusting the lengths of reciprocation imparted to the tool. The crank-arm is movable endwise in a ho1e151 in its shaft, the position of the crank-arm being indicated by the marks of an index 152 thereon. An annular flange 153 on the crank-pin which aids inlocating the crank-pin by being received against a flattened portion 154 of the crank-arm, is arranged to be received in a recess 155 in the outer wall of the hole 151 in the shaft 141, for adjusting the crank-pin proximate to the axis of the rotation of the shaft, and thereby increasing the range of adjustment of the crank-arm, by providing for especially short lengths of reciprocations.

The crank-arm is rigidly secured to its shaft by means of a stem 156, the inner end of which has a tongue 157 received in a groove 158 in the crank-arm in order to prevent turning of the crank-arm. A set-bolt 159 is threaded in the outer end of the wall of the bore 160 in the shaft 141, and acts upon the stern in said bore to clamp said stem against the crank-arm and thereby fix the latter in its hole.

The shaft 141 has rotation and axial movements in bearings 161, 162, of a gearhousing 163. A worm-gear 164 rotates said shaft. Said shaft is provided with a spline 165, a key 166 in saidworm-gear projecting into the splineand maintaining rotative relation between the gear and said shaft while permitting endwise movements of said shaft in said gear during its rotation.

A worm 167 meshes with the worm-gear and has a pinion 168 thereon. Said worm and said pinion rotate together, and are fixed to a shaft 169, as by means of a set screw 170. The shaft 169 is rotatable in bearings 171, 172, in said housing. A 173 meshes with said pinion and is provided with a hub 174, rotatable in a bearing 175 in said housing. A shaft 17 8 is journaled in a bearing 179 in said housing and extends throughsaid gear and hub. This shaft has a spline 180 therein, into. which a key 181 in the gear 173 projects, for causing combined rotation of said gear and said shaft throughout the positions of lateral adjustments of the carriage.

The gear-housing may form a lubricating chamber for the gears therein and be provided with a cover 182.

Means are provided for fixing the gearhousing to the carriage,preferably providing said gear-housing with one wall 185 of a guideway 186, the other wall. of which is formed by a block 187 adjustable laterally in a guideway 188 in the gear-housing, the latter guideway and block being formed with a tongue and groove joint 189 for holding the gear-housing in place by means of clamping action of the block. The firstnamed wall of the guideway and the block are formed with jaws received under the laterally extending overhanging walls of the usual guide 26 on the carriage of the lathe. A'bolt 190 is journaled in the gear-housing and threaded into said guide-block for drawing the two walls of the guideway 186 toward each other and thereby clamping said gear-housing to the guide 26. I

The gear-housing may be placed in adjusted positions on said guide to properly locate the same with relation to the axial line of the work, and the adjustable clampblock permits the gear-housing to be clamped to guides of different widths, to accommodate my improved attachments to lathes of different sizes and makes.

The shaft 178 is further journaled in a bearing 191 of an arm 192 arranged to be secured to the bed of the lathe. This arm is arranged to be placed in adjusted positions, dependent on the position of the gear-housing and the driving connection with the driving mechanism of the lathe.

This driving connection is shown as a sprocket-chain 193, received about a sprocket-wheel 194: fixed to the quill of the lathe by being clamped between a usual shoulder 195 of said quill and the usual head-plate 55 or head-chuck 33, screwed over the threaded end 196 of the quill. A pin197 may additionally connect the sprocketwheel and the part thus screwed on the quill. The sprocket-chain is also received about a sprocket-pinion 198, fixed to the shaft 178 by means of a set-bolt 199.

In locating the parts, the gear-housing is placed in approximate position on the carriage, and a chain of suitable length selected to drive the sprocket-pinion from the sprocket-wheel, whereupon the gear'housing is shifted forwardly or rearwardly to place proper tension upon the sprocket-chain while the shaft 178 is parallel with the axis of rotation of the head-spindle, whereupon the bearing-arm 192 is positioned in its proper relation to obtain the results mentioned. The bearing-arm is then clamped in place,

as by means of a clamp-bolt 201 received through a slot 202 in said arm and received in a threaded hole in a lug 203 of a saddle 204 fixed to the lathe-bed by means of a bolt 205 received through a cross-piece 206 and a hole in said saddle, the ends of said crosspiece and saddle contacting opposite sidesof the Walls of said lathe-bed, a nut 20 clamping said parts in place.

If it is desired to apply my improved attachment to a lathe, the tool-saddle is scoured to the crossslide oflthe carriage. The tool-saddle is instanced as imposed upon the tool-slide, which serves as a cross-slide, with the indicator on the swivel-block registering zero, to show that the guideway of the toolslide is perpendicular to the axis of rotation of the work. The gear'housing is mounted upon the rear end of the carriage, being secured to the cross-slide guide, and

the crank of the driving means is connected.

is to receive the oil-grooves. The left-hand end of the shaft in Figs. 1 and 2 is instanced as grooved, by crossing grooves 211, 212, while a single groove 212 inthe right-hand end is being formed. I

The carriage is adjusted laterally on the bed by means of the rackand pinion or the lead-screw, so as to position the tool in proper relation .to the shaft'to be grooved.

The cross-slide is thereupon moved toward the shaft by turning the handle 214;, which is fast to the cross-feed screw 215, or such movement may be accomplished by power through the medium of the splined rod'216, suitably driven in usual manner, and connecting with the cross-feed screw .215 by means of a suitable train of gearing communicating motion to a pinion 217 rotatingly secured to said cross-feed screw. The crossfeed screw in this instance has a nut 218 threaded thereto, which is fixed to the crossslide by means of a clamp-bolt 219, which extends through a slot 220 in said crossslide, for providing adjustment of position of the cross-slide with relation to the car- Eiaage and cross-feed screw crosswise of the A usual handle 225 controls the neutral position inv said gearing or connects said gearing so as to rotate the crossfeed screw to the right or to the left for movement of the cross-slide toward the work or away from the work, with the tool either in front or in rear of the axis of the work. An arm 226 operates the usual half-nuts about the lead-screw for connecting or disconnecting the carriage with the lead-screw.

One of the forms of grooves cut by my improved attachment is exemplified in Fig. 11, in which a groove 211 is exemplified in full lines and a crossing groove 212 is exemplified in dotted lines. These respective grooves on the inner periphery or outer periphery of an object represent substantially a figure 8. The feeding of the cross-slide toward the Work moves the tool into contact with the Work, and such feeding, continuing after contact has been made while the work rotates, causes the tool to cut into the work to form the groove.

In the exemplification shown there is one revolution of the work to each endwise movement of the. tool, the configuration of a single continuous groove being imposed on the work at each two revolutions .of the-work and reciprocation back and forth of thetool. The depth of the groove is determined by the adjustment ofthe cross-slide towardthe work. The operation is rapid.

The portion of the shaft lengthwise of the shaft over which the, groove extends is determined by the adjustment of the crank arm. The closer the crank-pin is to the axis of rotation of the crank-shaft, the shorter will be the length of work portion over which the groove extends, and the farther the crank-pin is away from the crank-shaft, the longer will be this portion.

Connection between the driving means for the crank-shaft and :the tool is maintained during crosswise movements of the crossslide by reason of the ball and socket connection between the crank-pin and crankblock and the tongue and groove connection between the crank-block and the cross-head, with the result that; during such movements the crank-shaft moves axially in the wormgear. Assum-ingthata groove has been cut in a shaft, as exemplified at the right-hand end of the shaft inFig. 2, which groove laid out in plane is shown in full lines in Fig. 11, and assuming that it is desired to cutthe same portion of the shaft with a crossing groove, the cross-slide is moved to move the tool away from 1 the shaft and the shaft turned 180 degrees, for instance, by; locating its dog 51 in the opposite slot 54 of the'headblock.

The tool is-again moved toward thework, which it will contact at points opposite to the contacts thereof for making the first groove. The grooves. formed have their corresponding portions at opposite sides of the work, for forming a double crossing figure 8, which, laid out inplane, is shown by the fu-lllinescand .dotted' linesof Fig. 11. Such crossing grooves areshown at the..,left.-hand endofthe-shaftin Fig. .2.

When forming agroove in a'rshort piece of work, exemplified. by .thestud 38 .in Fig. 12, .the toolbar is. so placed lthat a tool .in its overhanging end will contact said *stud and cutsaidgroove, theadjustment .of the carriage and :crosseslid'e. ofgthelatheibeing made to effect such-cutting. I In thisarrange swung on its swivel mountin ment the crank-arm may be moved close to or past the axis of the work. A single setting of the stud will enable a single con tinuous groove 227 to be cut. The stud is arranged for havinga crossing groove cut thereon by turning the samelSO degrees in itschuck, or by presenting the opposite cutting end of the tool against the rear of the work.

If it is desired to cut a tapering face, the tool mounting is placed at an angle with relation to the-axis of rotation of the work, as indicated in Fig. 13, in which the attachment is exemplified as cutting a groove 228 in a tapered bore. If the tapered bore is of too small a diameter to receive the tool-bar and its tool, a reduced supplemental tool-bar 127 is employed having a tool of shorter lengthpand one of the grooves is cut into the inner periphery of the work. When the cutting of the groove is completed and it is desired to out a crossing groove, the crossslide is moved rearwardly by rotation of the cross-feed screw and the tool mounting so that the toolbar will extend at a correspondingangle at the other side of the axis of the work.

The cross-slide is then fed for the other end of the tool to contact the other sideof the inner periphery. The feeding of the tool for causing the tool to enter the work and the operation for causing reciprocations of the tool and rotations of the work result in a crossing groove beingformed in the tapered inner periphery of the work. It will be understood that the cutting edges at the opposite ends of the tools are oppositely presented to the work, one of them cutting when contacting an ascending face and the other cutting when contacting a descending face. The feeding of the tool may be accomplished in the present instance by feeding the tool-slide, which ispart of the cross slide and serves the part of a cross-slide.

During such reciprocations of the tool when placed at an angle with relation to the axis of the work, endwise movements are imparted to the crank-shaft by the ball and socket joint and tongue and groove slide connection between the crank-arm and the cross-head, which maintain the driving connection between the crank-shaft and the tool throughout the different positio is and adjustments of the tool.

Havingthus fully described my invention, what I claim as new, and desire to secure by Letter Patent, is:

1. In a grooving attachment for a metal turning lathe, the combination with thecarriage, the cross-slide and work-turning means of the lathe, of a tool-saddleon the crossslide, a reciprocating tool-support thereon reciprocating lengthwiseof the axis of said work-turning means, a housing at the rear of the carriage, driving means thereon, connecting means between said driving means and said tool-support to reciprocate the latter, and cross-feeding means for said tool-support.

2. In a grooving attachment for a metal turning lathe, the combination with the carriage, the cross-slide, the head-stock and the live spindle of the lathe, of a tool-saddle on the cross-slide, a reciprocating tool-support thereon, a housing, means for releasably securing said housing to the rear of the carriage, driving means on said housing, connecting means between said driving means and said tool-support to reciprocate said tool-support lengthwise of the axis of said live spindle, and cross-feeding means for said tool-support.

3. In a grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the cross-slide and the headstock of the lathe, of a tool-saddle, means for releasably mounting said tool-saddle on said cross-slide, a reciprocating tool-support on said tool-saddle, a housing, means for re-,

' leasably securing said housing to the rear of the carriage, driving means on said housing, connecting means between said driving means and said tool-support to reciprocate said tool-support lengthwise of said bed, and cross-feeding means for said tool-support.

4L. In a grooving attachment for a metal turning lathe, the combination with the carriage, the cross-slide and the head-stock of the lathe, said carriage provided with a cross-guide for said cross-slide, of a toolsaddle, means for releasably securing said tool-saddle on said cross-slide, a reciproeating tool-support on said tool-saddle, a housing, means for releasably clamping said housing to the rear portion of said cross guide, driving means on said housing, connecting driving means above said crossguide between said driving means and said reciprocating tool-support to reciprocate the latter, and cross-feeding means for said toolsupport.

5. In a grooving attachment for a metal turning lathe, the combination with the carriage, the cross-slide and the head-stock of the lathe, said carriage provided with a cross-guide for said crossslide, of a toolsaddle, means for releasably securing said tool-saddle on said cross-slide, including means for swiveling said saddle with relation to the axis of said head-stock, a reciprocating tool-support on said saddle, a housing, means for releasably clamping said housing to the rear portion of said crossguide, driving means on said housing, connecting driving means above said crossguide between said driving means and said reciprocating tool-support to reciprocate the latter, and cross-feeding means for said tool-support.

6. In a grooving attachment for a metal turning lathe, the combination with the carriage, the cross-slide, the head-stock and the head spindle of the lathe, of a toolsaddle, means for releasably securing said tool-saddle on said cross-slide, a reciprocating tool-support on said saddle, a housing at the rear portion of said cross-slide, means for adjustably positioning said cross-slide and said housing crosswise of the lathe with relation to the axis of rotation of said headspindle, driving means on said housing, and connecting driving means between the latter and said tool-support for reciprocating'said tool-support lengthwise of said axis.

7. In a. grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the cross-slide, the head-stock and the head-spindle of the lathe, of a reciprocating tool-support on the carriage, a cross-headtherefor, a housing at the rear portion of the carriage, a crank-shaft thereon, and crank driving means between said crank-shaft and said cross-head proximate to the axis of rotation extended of said headspindle.

8. In a. grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the cross-slide, the head-stock and the head-spindle of the lathe, of a toolsaddle on the cross-slide a reciprocating tool-support on the latter, a cross-head therefor, a housing at the rear portion of said carriage, a crank-shaft thereon, means for adjusting said toolsaddle for locating said tool-support at an angle to the axis of rotation of said head-spindle, and crank driving means between said crank-shaft and said cross-head proximate to the axis of rotation extended of said head-spindle arranged to maintain driving relation with said cross-head during movements of said cross-head toward and from said axis.

9. In a grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the cross'-slide, the head-stock and the head-spindle of the lathe, of a toolsaddle on. the cross-slide, a reciprocating tool-support on the latter arranged to reciprocate lengthwise of the axis of rotation of the head-spindle, a cross-head therefor, a housing, means for releasably securing said housing to the rear portion of the carriage, an axially slidable crank-shaft thereon, a crank on said crank-shaft, and operative connecting means between said crank and said cross-head resisting separation in axial directions.

10. In a. grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the crossslide, the head-stock and the head-spindle of the lathe, of a toolsaddle on thecross-slide, a reciprocating tool-support on the latter arranged to reciprocate lengthwise of the axis of rotation of the head-spindle, means for adjusting lengthwise of the direction of said reciprocation, a crosshead for said tool-support, a housing, means for releasably securing said housing to the rear portion of the carriage, a gear thereon, an axially movable crank shaft maintaining driven connection with said gear during its axial movements, a crank, means for ad justably positioning said crank on said crank-shaft, and operative connecting means between said crank and said cross-head resisting separation in axial directions.

A In a grooving attachment for a metal turning lathe, the combination with the bed, the laterally adjustable carriage, the crossslide and the work-turning means of the lathe, of a tool-saddle on the cross-slide, a reciprocating tool-support thereon, a cross head on the latter, a gear-housing, means for positioning said gear-housing on the rear portion of the carriage, gearing therein,

a crank-shaft journaled in said housing.

driven thereby, crank means between the latter and said cross-head proximate to the axis of rotation extended of said work-turning means, and a drive-shaft extending lengthwise of said bed, having rotative drive-con nection with said gearing during lateral adjustments of said carriage.

12. In a grooving attachment for a metal turning lathe, the combination with the bed, the laterally adjustable carriage, the crossslide and work-turning means of the lathe, of a tool-saddle on the cross-slide, a reciprocating tool-support thereon, a cross-head on the latter, a gear-housing, means for positioning said gear-housing on the rear portion of the carriage, gearing therein comprising gears at right angles to each other, a crank connected with said cross-head arranged for resisting separation in axial directions, a drive-shaft, a crank-shaft, and rotative drive connections between said respective shafts and said respective gears permitting axial movements during continuance of drive relations between said respective shafts and gears.

13. In a grooving attachment for a metal turning lathe, the combination with the bed, the laterally adjustable carriage, the cross slide, the head-stock and the head-spindle of the lathe, of a tool-saddle on the crossslide, a tool-support thereon reciprocating the axis of said spindle, a

cross-head on said tool-support, a gearhousing, means for positioning said gearhousing on the rear portion of said carriage, a crank-shaft for said cross-head, gearing in said housing for driving said crank-shaft and comprising a driving gear, a drive-shaft extending lengthwise of said bed arranged to maintain driving relation with said driving gear during lateral adjustments of said carriage, drive connecting means between said head-spindle and said driveshaft, and an adjustable bearing bracket at said head-stock for said drive-shaft.

14. In a grooving attachment for a metal.

turning lathe, the combination with the bed, the carriage, the cross-slide and the workturning means of the lathe, of a tool-saddle on the cross-slide, a gear-housing at the rear of the carriage, driving means between the gearing on said gear-housing and the toolsaddle for reciprocating said tool-saddle lengthwise of the bed, means for feeding said cross-slide toward and from the axis of rotation extended of said work-turning means, means maintaining the driving connections in said driving means during said feeding movements, means for feeding said carriage lengthwise of said bed, driving con nections between said work-turning means and the gearing in said gear-housing, and means maintaining said driving connections duringl adjustments of said carriage. 15; n a grooving attachment for a metal turning lathe, the combination with the bed, the carriage, the cross-slide and the workturning means of the lathe, of a tool-saddle on said cross-slide, a reciprocating tool-support thereon, a gear-housing supported on the rear portion of said carriage, driving means between the gearing on said housing and said tool-support for reciprocating said support lengthwise of said bed, and. means connecting said work-turning means and said gearing in definite relations for cutting a continuous groove in the work lengthwise of and surrounding the axis of said work.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

OSCAR W. MUELLER.

Witnesses:

DAWSON E. BRADLEY, DELMA WERNSING.

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