US876932A - Metal-working machine. - Google Patents

Description

No. 876,932. PATENTED JAN. 21, 1908. L. H. BLOOD.

METAL WORKING MACHINE.

ATION FILED APR.5. 1900. APPLIG I 6 SHEETSSHEET 1.

1/1060 fag? il Zfflesaes. W f/f 5 6. Oz/mg.

PATENTED JAN. 21, 1908.

METAL WORKING MACHINE. APPLICATION FILED APR.5, 1900.

6 SHEETS-SHEET 2' b Q 1 E 3 Q i" Q m o E :a 3 i H R E lll'll s m 3 w w I 3 1i I r 1 a W i f R (\1 an; a x wj 3 M m 11 {Di 2 P B $1 M'Jnesses. q /nue/1f It No. 876,932. PATENTED JAN. 21, 1908.

L. H. 131,001). METAL WORKING MAGHINB.

APPLICATION FILED APR.5. 1900.

6 SHEETS-SHEET 3.

M/IYGSSGQ;

261i. (Mm- 9 6 SHEETS-SHEET 4.

- PATENTED JAN. 21, 1908. L. H. BLOOD. METAL WORKING MACHINE.

APPLICATION FILED APR 5 1900 I Awe/1T0 No. 876,932. PATmv l'fiD JAN. 21, 1908.

L. H. BLOOD.

METAL WORKING MACHINE.

APPLICATION FILED APRJS, 1900.

6 SHEETS-SHEET 5.

M77766 Sc'fS v //1ue/7/0r UNITED STATES PATENT OFFICE.

' LOUIS H. BLOOD, OF HARTFORD, CONNECTICUT, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TOTHE BLOOD MACHINE COMPANY INCORPORATED, OF WINCHES- TER, CONNECTICUT, A CORPORATION OF CONNECTICUT.

mirAL-wonnrm MACHINE.

. Specification of Letters I'atont.

Application filed April 6- LQQO- Serial No. 11-741.

Patented Jan. 21,1908.

To all whom it concern:

- Be it known that I, LOUIS H. BL OD, a citizen of the United States of America, and

e a resident of the city and county of Hartford I and State of Connecticut, have invented cermetal-workingmachines commonly known as f turret-lathes" or single spindle screw machines.

An object of the furnish a metal-War g machine of resent .invention is to 15 proved, simplified and efiicient construction and organization embodying a rotative workholder a d a rotative mutiplex tool-holder having parallel axes in -a common vertical plane, and one of which is dis osed wholly slow the other; means for a vancing and retracting one holder with res set to. the other; and improved adjustab e stopping instrumentalities for limiting and varying successive advancing movements of one holder withrespect to the other.

A further object of this invention is to provide, in a machine of the class specified, a reciprocatory work-spindle carrier having an'nnproved work-spindle or holder; im-

roved turret, mechanism including a turret naving its axis disposed parallel to, and in the vertical plane of, the axis-of the work- H holder and having a plurality oi work-holding. faces disposed in planestangentto a common are doncentricto the axis of the tu1ret,an d the turret being so located with res ect' to the workrhold erthat said faces wil be brought, on successive rotative ads ,vancin movements of the turret, succes- 40 sively into tangential relation with anfarc' concentric "to the axis of said work-holder; improved turret-positioning and tool-strok limiting means, including a bolt or abutment and independently adjustable stops or positioning-members cooperative with said.

olt or abutment for limiting the extent of successive rotative movements of the turret" and thereby limitingl-theworking-strokes of successive to'ols iwit creepest to the giwork; and Improved work-spin le rotating ,l mechanlsm' embodying means whereby said thereof and whereby the veloci y of said spindle may be constantly rotated e advancing and retracting movementsinstrumentalimes'; in the particular coo era-.

tive organization of these instrumentahties; in the special construction and organization of the several parts of each improved elementary feature; and in the general coopera.-

tive organization of the parts of each elespindle may be arbitrarily changed without interrupting the reciprocatory movements mentary feature with respect to the parts of the other elementary features, substantially as hereinafter fully described and more par ticularly pointed out in the claims.

In the drawings accompanying and forming part of this specification, Figure 1 is a plan view of a metal-working machine emodying this invention; Fig. 2 is a central longitudinal section of the metal-working machine taken on a'line corresponding with the dotted line msc in 1, the multiplex stop'deviee' which limits successive advancing movements of the work-s ind-1e carrier with respect to the turret being'shown in this figure as fixed to the, spindle of the turret at the rear end of the machine, and the turretpositio and tool 1 stroke limiting means, which in this figure shown partly in dottedlines", being located at the forward end jof the machine .and partly within the turret. Fig. 3 is a rear end elevation of the machine shown in Fi s. Land 2, with a ortion of'the framewor broken away to s ow parts of the spindle driving mechanism; Fig. lli's'a front end elevation of said machine, as seen fiom theright in Fig. 1, with a ortion of 1 the end we! of the framework away and with a portion of the turret and turret rotating means in vertical section, Whereh'y to more clearly illustrate certain details; Fig. 5 is a central longitudinal-vertical section, partly in elevation, of the metalwashing machine, showing a modified construction; and organization of turret and toolposi-tioning. means and spindle-carrier stopp' means, the former of which is located at t rear end of the machine and the. latter of which shown located at the forward end offthe maehineand indirect connection with the turretpr'openl ig. 6 is an enlarged. vertical cross-section of the-work-spin'dle;

carrier, work-spindle} a portionof the workroken spindle rotating means, and a portion of the bed of the machine, said section being taken on a line corresponding with the dotted .line

y-y in Fig. 2 and showing those parts at the right of said line, certain elements being omitted; Fig. 7' is an enlarged cross-sectional view of the multiplex stopping device shown in Figs. 1 and 2, this figure showing the stop carrier, the spindleon which it is mounted, the adjustable stops, and the ad- 'ustin'g screws in connection with said stops;

ig. 8 is a front view of a portion of the turret and of the machine showing the turret and a tool-on said turret in their proper relation to a iece of work carried by the work spindle; ig. 9 is a'graphical diagram illustrating the paths of movements and successive effective working positions of the cutting edge of the tool with respect to the axis of work; and the concentric path and successive positions (corresponding to the path and successive positions of the cutting point of the tool) of one stop abutment or positioning-memberwhich determines the extent of effective rotation of the turret and consequently limits the working stroke of the tool. Figs. 10, 11, 12"and13 are enlarged details of the chuck instrumentalities. Fig. 14 is a detail showing the second. worm of the change-speed device, this worm having a different pitch from the firstworm,

shown in Fig. 6.

Similar characters refer to like parts in all (I the figures in the drawings.

' The metal-working machine, in the preferred construction and organization thereof shown in the accompanyingdrawings, comprises a suitable framework consisting of a ase A and a bed B; the latter of which has longitudinal slide-ways of usual cdnstruc ion; a work-spindle carrier 0 supported in said sllde-ways for reciprocatory movements l on- A gitudinally of the bed of the machine; re-

clprocating means (desi nated by G) for said carrier; work-hol ing and rotating means consisting of a work-spindle or holder D supported for rotative movements in bearings on the carrier and having a chuck D' at the outer end thereof and driving mechanism (designated in a general way by E) in operative connection with the workspindle; a rotative turret F supported in advance 'of the slide-ways of the bed and having its-axis parallel to, and in the same vertical plane as, the axis of'the work-spindle and having a plurality of tool-holding faces; turret rotating means (designated by F) in connection with said turret; a mutiplex stop-device (designated in a general way by 'G) embodying a' lurality of independently adjustable stops isposed substantially concentrically about a common axis and'-mov' able with the turret in a curved path 'ntersecting an abutment on the work-s indle carrier whereby to limit successive a vancwould intersect each ot er'at a cluding a plurality of positioning-member s or sto s disposed concentrically about the axis 0 the turret and adjustable in a common arc with relation to each other and a reciprocatory lock-bolt or stop shiftable into the path of the positioning-members or stops and efiective for limiting successive rotative movements of the turret and consequently the effective working-strokesof the tools.

The framework of the machine may be of any desired or suitable general construction for supporting the several mechanisms and consists of a base A and a bed B. The base A, in the preferred form shown in the accompanying drawings, is of box-like construction and is divided by a vertical transverse partition 3 into two compartments 1 and 5, respectively, the rear one, as 4, of which incloses portions of the spindle-driving mechanism and the front one as 5, of which, partly incloses the turret-mechanism and constitutes a receptacle for chips, oil, etc.

The bed B, which is shown su ported upon the base A, consists-of an ob ong. recessed main portion 6 having longitudinal slideways 7 and 8 to receive and support the' work-spindle carrier, which slide-ways termina'te at their forward ends substantially in vertical alinement with the forward face of the partition 3; and a horizontally disposed turret-su porting bearing 9 formed integral with the fbrward end of said bed and extending outward beyond the forward end of the slide-ways. This turret bearing which is preferred axially recessed, as at 10, has a conical outer face 12 ta ered on lines which oint in advance of said bearing, and which earing also has an axially recessed transverse end wall, the recessed portion of which wall is preferably shouldered to form an abutment face for a wear-plate or ring 14 secured in said recess and extending outward beyond the face of said wall. It is desired to state in this connection that the construction of the turret) sup orting bearing 9 may be modified without epart urc from this invention so long as,- it constitutes an integral part of the bed B The work-spindle carrier C, which may be ofany suitable general construction, is shown as a'slide fitting the slide-ways on the bed of the machine and has work-spindle-supporv ing bearings '15 and 16 at opposite ends thereof. 'This carrier also has secured to the lower part thereof, preferably midway its width, a rack-bar 17, and also has a stop [abutment 18 which, inthe preferred form thereofshown in Fig. 2, is formedintegral with, and extends downward from the rear end of, the rack-bar 17 in position to cooperate with stops as hereinafter described. he

work-spindle carrier reciprocating means C is shown as a pinion 19 meshing with the rack 17 andfixed to the shaft 20 (see Fig. 3) journaled in a transverse bearing 21 on the front side of the bed of the machine; and a hand-wheel 22 fixed to the outer end of said shaft. In the above connection it is desired to say that any well known or .suitable automatic means (not shown) may be provided for actuating the work-s indle carrier, and that the invention is not imited to the specifichand operated. means shown in the accom anyingdrawings.

T e work-holding and rotating means consists in the form thereof shown, of two cooperative mechanisms 'i. e., thework-holder or spindle proper, which is designated in a. general way by D, andhas at the forward. end I thereof a chuck D; and spindle-rotating mechanism, whichis designatedin a general way by E, and which is in operative connec! tionwith the work spindle. The work-spindle, which is ractically a combined work? spindle and chuck in the form illustrated, consists of the main. tubular. portion 28- the rear end,of which is supported in the rearbearing 15of the carrier; an enlarged axially recessed. chuck-head portion 24-located atthe forward. end thereof and supported the major portion of its length in theforwal'd bearing 16 of said carrier. The internal face of the chuck-head or casing 24 of the spindle D is conically tapered from-the extreme forward end to apoint. substantially midway the length of said head and is straight. from this point to the rear transverse wall thereof.

This head constitutes one element of the chuck D, the other elements. of said chuck consisting of an internally and externally taperedabutment-sleeve 25 fitting the conical recess ofsaid head and preferably having a screw-threaded bearing therein aplurality of work-gras ing jaws, each designated by 26, supporte within said head and having.

tapered outer faces cooperative with the in? ternal tapered face of said abutment-sleeve; a thrust-member 27 supported between the rear ends of the jaws and rear wall of said head for reciprocatory movements and having a positive connect on with all of said jaws, whereby upon advancing and retracting movements of said thrust-member the jaws will beconcurrently advanced and retracted to close and open the same; and a thrust.' member-actuator J in operative connection with said thrust-member and consisting, in

the form shown in Figs. 2 10 and 11, of a series of circumfer'entially disposed pins or pro-- jections 28 fixed to the rear end of the thrustmember and. extending backward into Ion.- gitudinal grooves 29 formed inthe periphery of the bodyportion ofthe s indle, a-plurality ofcam-levers 30 fulcrume at their forward ends as at 31 andeach havin a cam face 32 in bearing engagement with t e rear end of a pin or projection 28; a fulcrum bearing 33 shown as a collar adjustably. secured to the forward end of the tubular portion 23 of the spindle and having in the front face thereof an annular groove which forms a seat for the rounded fulcrum end of the cam-lever, a camlever+actuatingcollar 34 supported for reciprocatory movements on the body portion of the spindle in the rear of the head portion 24 and having an internal cam face 34: operable, on retractive movements ofsaid collar, for depressing the rearwardly and upwardly projecting arm of the cam-levers '30 whereby to impart to said levers a thrust-member-advancin movement, and a thrust-memberretractlng device shown as a spring 35 disposed'between the enlarged portion of the thrust-member and the rear ends of the abuts ment slee've'25 and efl'ective, on the forward movement ofthe collar 34, for imparting retractive jaw-releasing: -movements to said thrust-member 27. The thrust-member 27, which is shown somewhat in the nature of a collar, is diametrically reduced at its forward end and has at the extreme end of such reduced. portion an annular flange 27 of less diameter than the diameter of the main ortion of said member, in which is forme at proper relative circumferentially distances,'a V series of transverse guide-grooves or slots each of which is designated by 27' and the work-grasping jaws have-at their rear outer edges rearwardly and downwardly extendin L-like projections 26 which extend aroun the outer edge of the flange 27 on the thrustmember and said jaws having vertical plane rear faces 26 which bear against the ,end face of said thrust-member as will be readily understood by reference to Figs. 10, 11 and 13 of the drawings, whereby said jawsare held as against longitudinal movement with respect to said member.

Asa convenient means fi or holding the j aws in their proper relation circumferentially, each jaw is shown PIOVldBdWltll a radial r disposed pin-26V which enters a groove 27 in the flange 27 of the thrust-member as clearly shown in Fig. 13. "This construction and organization of 'aws and thrust-member insures a positive longitudinal movement of said aws with their work-grasping faces in parallel lines and prevents accidental dislOQ placement of said jaws circumferentially with 1 vance of the spindle hearing. The cam-leveractuating sleeve or collar 34 is circumferentially grooved and is shown operated by a shifting-lever 34 pivotallysupported on the work spindle carrier and-having a strap at the inner end engaging in said groove.

the work-spindle rotating mechanism,

- which in the preferred form thereof shown most clearly in Figs. 1 to 5 inclusive, embodies instrumentalities for varying the speed of the'spindle and which may hereinafter be referred to either as the differential-speed spimlle-actuating. mechanism or spindleactuating mechanism, comprises two wormwheels 36 and 37, respectively, of different pitches, rotatably mounted upon the spindle l) between the bearings 15and 16 and-which practically constitute loose clutch-members, each having clutch elements on the inner face thereof; a shiftable pin-clutch or clutchmember 38 splined to the spindle for reciprocatory movements between the two loose her 4 and having a band-wheel or sheave 46 clutch-members or worm-wheels; an actuating lever 39 pivotally supported on the carrier and having means in operative engagement with the shiftable clutch-member; two worms 40 and 41 of different pitches mesh: ing, respectively, with the worm-wheels 36 and 37 and having their shafts journaled in horizontal bearings on the carrier; two'bandwheels or sheaves 42 and 43 fixed to the shafts of the worms 40 and 41, respectively; an idle band-wheel 44 pivotally su ported on the carrier below and interme I iate the bandwheels 42 and 43 (shown in dotted lines in Fig. 2); a counter-shaft 45 'ournal'ed in transversebearings in the base within the chamand a cone pulley 47 fixed thereto; a band 48 extending around the sheave 46'on the counter-shaft, over sheave 42, under the idle bandwheel,44 and over thesheave-43; an oscillatory tension device (designated in a general way by K) in 0 erative connection with said band 48 and e ective for retaining the same taut during the reciprocatory' movements of the work-spindle carrier irrespective of varia tion in the distances between, thecs'heaves on said carrier and the sheaves 46 on the countershaft and which tension device preferably includes a weight 49 pivotally' supported at 49 on the side wall of the base and having at the free end thereof two idle-wheels 50 and 50 in bearing engagement with thee-two runs respectively, of 'the'band 48, as will be readily understood by reference to Fig. 2 of the drawsue as T, may be secured thereto.

51 and which may be driven from any suitable source of power.

It will be obvious that the differential-- speed s indle-actuating mechanism ma be various y modified within the purview 0 this invention, and that the "tension device SK, practically constituting an element of said actuating mechanisrn,-is also subject to some modification without departing from this invention.

The turret or work-holder Fis supported for rotative movements on the turret bearing 9, and, in the preferred form thereof shown in Figs. 1 and -2 of the drawings has a conical inner face fitting the external conical face of said bearing, and has the outer end.

thereof closed by a wall 55. The contour of the tool-holding face of the turret is in the monarc concentric to the axis of said turret,

and each having one or more lon itudinal T- rooves 58 formed therein where y tools,

This turret F is located with its tool-holding faces wholly below the axis of the work-spindle and has its axis in parallelism with, and in the same vertical plane as, said spindle axis, whereby on successive rotative movements of the turret the work-holding faces will be brought successively into tangential relation with an are which is concentric to the axis of said work-spindle. As a means for holding the turret upon, and against movement longitudinally of, the turret bearing there iS'provided a turretholdin spindle '59 which extends the entire len t of the bed B, is journaled at its rear en in a bearing in the rear wall of the bed, and extends at "its forward end through adjacent end walls of the turret bearing and turret, it being in the organization shown in Fig; 2, provided at this end with a nut which bears against theouter face of the end wall of the turret, and is shouldered at a point in the rear of said end wall, as at 60, to bear against a T-bushing or collar 61 interposed between the wear-plate or ring 14 and the reduced end of the spindle. The turret rotating means, in the form shown in the accom anying drawings, comprises a worm-wheel 56 preferably formed.

integral with the front end wall of the turret;

a worm 62 meshing with said worm-wheel and having a shaft. 62 journaled for a port1on of its ength in an elongated bearing 63 having at the inner end thereof an internally channeled ring 64 surrounding and coverin the eriphery of the worm-wheel 56, an whic shaft62 is supported at its outer end in a bearing 65 on the front wall of the chamber 5 of the framework and is also vided with a hand wheel 66 whereby the pro- I of whic i with in a circular path intersecting t the axis of the turretl and are. connectedyto said turret for movement concurrently theree path of the abutment 18 on the work-spindle carrier, and each of said stops is constructed and organized for independent adjustment in a line parallel to the axis of the turret spindle 59. In the specific form shown in Figs. 1, 2 and 7 the multi lex sto -device consists of a stop carrier 67 ed to t e turret spindle-59 near the rear end of the machine and below the work-spindle carrier, and having a plurality'of longitudinal stop-guiding grooves '68 formed in, and substantially equidistant about, theperiphery thereofja plurality of stops 8 having projections fitting said groove and. supported for longitudinal movements therein; and independent adjustable means for each stop consisting of an adjusting screw or screw-rod 69'journaled for rotation in a bearing formed in a flange at the rear end of said stop-carrier and having a screw-threaded bearing in the stop, said screw havin at the outer end thereof a head and w ich adjusting screws are normally held against rotative movement by means of a'olamping device consisting of a clamp-plate 70 bearing against the heads of said screws, and a clampin collar 711 screwed upon the outer end oft e spindle and bearing againstjsaid clamp-plate, as will be readil understood by reference toFi 2 of the 'rawings. In the s ecific form thereof shown in F g. 5 of the rawing the mutiplex sto 'device'G is tion that the invention is not and shown as aplurality of'stops s avin screwthreaded shanks bearing in screw-t ead'ed openings in the outer end wall of thqturret osed in an are substantially coneentric to t c axis of the turret for orbital movements in a path' intersecting the stfip abutment on the work-spindle carrier, w ich'sto abutment in this instance is shownas a re or' bar 18 extending forward beyond the front end of the carrier and adapted to enter the inner end of; the turret and eoiiperate successively with the successive stops 8" which limit successive. advancing movements 7 of said carrier. V

1t isdesired to state intheabove conneclimted to the spe ifi construction and organization of. stop device shown .in the drawings for determining the limit of successive advancingmovements of the work-s indle carrier, as these may be modified within the purview of this invention so long as the cooperative relations between the stopping instrumentalities and the turret or turret-spindle are not departed from. v

The stops sand s are so disposed relativelyfto each other about the axis of the turret ,to have a fixed relation, circumferentially with the work-holding faces of the turret, the

number of stops corresponding to the numbers of worliz holding faces, whereby each stop will determine the advancing movement of the work-spindle with respect to a articular tool or to a particular work-hold-' mg face on the turret; and it will be under- I stood by a comparison of the figures ofthe drawings that orbital movements are imparted to -the. stops concurrently with rotative. movements of the turret and by the turret rotating means. l

The turret-positioning and tool-stroke -lim iting means, which isdesignated in a general way by H, comprises a plural number of positionin -members or stops 71 disposed substantia y in the arc of a circle concentric to the axis of the turret and are connected to have orbital movements concurrent with therotative movements of'saLd turret and each positioning-member having a stop face 72 axis of the turret; and a cooperative bolt or stop-abutment 73 supported for reciprocato movements in a fixture on the machine an 'shiftable into the path of. the positioning members and independent means for actuatthe bolt or sto abutment; Y n the preferre s cific constructionand 3 organization thereo shown in Fig. 5 the Eturret-positioning and tool-stroke-limiting {means consists of a disk or carrier 7 4 fixed to the rear end'of the turret spindle and having in' the periphery thereof a T'-groove 75; a plurality) of ositioning-members 71 disposed" a'out t e periphery of the carrier for adjustment ina common arc with relation to g each other and each having a step face 72 as ibefore stated; adjusting and holding means 76" shown as bolts in connection with each stop member and disk; a-bolt or stop-abut- {m'ent 73 supported for reciprocatory move lments in a earingon the bed B of the machine in'parallelism to the axis. of the turret spindle; a s ring 78\ for advancing the belt a d norm y retaining the same with its working, end in the path of the p'ositioningemembers; and a treadle mechanismfor imparting retractive movements to said bolt and consisting of a treadle 79 and an actuating connector 80 between said? treadle and bolt. Thestops 71 are made adjustabl'ein order that they may be located with precision and also shifted slightly to compensa'te for wear. As the faces of the bolts 8 of the turret and the long screw-bolt 18 on the work-carriage are quite wide the permit 5 each stop point of the turret-in t e direc- 'tion of i rotation to be varied slightly,

disposed in a plane substantially radial to the 1 the stop faces on these variations being controlled by corresponding adjustments of the stops'71.

In the form thereof shown in Figs. 2 and 4 of the drawin s the positioning-members are carried directly by the turret and e uidistantly disposed about the axis thereo with their stop faces extending into the interior of said turret, and the stop bolt is supported for reciprocatory movement in the turret bear ing with its top face normally located in position to cooperate with the stop faceof the positioning-member, the bolt in this instance eing retracted by a treadle through the me dium of connecting instrumentahties, arts of which are-located within the turret earing. In these figures theturret-positionihg and tool-stroke limiting means is designated by H, the stops by 71 and the bolt or stopabutment by 7 3. The stops 71 are not adjustable about the turret axls.

an-arc which is preferably concentric to the axis of the turret or holder and substantially intersects .theax-is of the work on which said tool is,operating.

The raphical diagram Fig. 9 fully illustrates t e relative movements of the turret F; tool T; and turret-positioning and toolstroke-limiting means. In this figure the path described by the cutting edge of the tool is indicated by the uppercurved line hh which intersects the axis f of the work represented at W; the tool is represented at T with its point at its starting position indicated at a, or in juxtaposition to the periphery to the work W the-successive butting positions of the tool being indicated'at b, c, d, e, and respectivel{, the length of that portion of t e are hh etween the positions indi-. cated at a and f being the total distance through which the cutting edge of the tool travels in cutting'olf the piece of work W.

The spaces between successive radial dotted working stroke.

lines extending from the turret axis indicated at 59, to the several points a, 6,0,- d,'e,

and f, respectively, on the curved line hh indicate '0 e distance through whichsuccessive parts of the turret and tool'between'said axis and the arc 'hh travel while the cutting point of the tool advances from a to f in its The curved line ii indicates the path of the stop face 72 of one positioning-member 71 of the turret-position- .---ing and tool-stroke-limiting means, and the little circles 11, b, 0, (1' e and f indicatesuccessive. positions of said stop-face with relationto the stop bolt 73,- corresponding to {the successive positions a, b, c, d, e, and f,

of the cuttingpolnt of the tool.

One of the tool holding faces 57 of the turfurther indicated by dotted lines (a position it occupies when/the tool is at the end of its 'working. stroke). at which time said face is tangent to the two arcs represented by the dotted lines and k7c respectively, the

'former of which is concentric to the axis of the turret indicated at g and the latter of which is concentric to the axis f of the work Was will be readily understood by reference to this figure.

When it is desired to change the length. of the cutting stroke of the tool; for instance if it is to travel only through that portion of the arc h-h located between the oints a and c the positioning-member 71 W51 be set with itssto face 72 intersecting the oint d so that w en the cutting oint of t e tool has arrived at c in its working stroke the stop face 72 will have arrived at f and be arrested in its further movement by the cooperating face of the bolt or stop-abutment 73.

L. In a metal-working machine, the combination with a work-spindle supported for rotative and reciprocatory movements and having a point of support shiftable to a position over and in the plane of the turret, of means for actuating sa1d spindle; and a rotative turret supported in advance of and adj a cent to the spindle with its axis in parallelism to, and below, the axis of said spindle and held as against straight-line movements and having a plurality of tool-holding faces disposed in planes tangent to a common 'are concentric to the axis of said turret.

2'. In a metal working machine, the combination with a rotary work-holder and a rotary ultiplex tool-holder having sub stantial y parallel axes, and with means for reciprocating one holdpr relatively to the other, of a multiplex stopping device com-.

prising a pluralit of. equidistant independently-adjustab e stops concentric with the axis of said multiplex holder and rigid means of connection between said stopping device and multiplex holder; means for simultaneously moving the multiplex holder 1n a common vertical plane and one of which spindles is fixed longitudinally and the other of which is supported for longitudinal movement; a turret fixed to wholl A sup orted below the axis of the other spind e an havinga plurality of plane tool- ,one spindle and,

holdin faces disposed to be brought suc- 'cessive y into tangential relation to an arc 'and means, including a lock-bolt, and a series of positioning members cooperative with said lock-bolt and adjustable in a common arc concentric to the axis of the fixed spindle, for limiting successive rotative movements of said spindle.

4. In a metal-working machine, the combination with two parallel spindles having their axis in a common vertical plane and one of which s indles is fixed longitudinally and other of w ich is supported for longitudinal movement; of a turret fixed to one spindle and wholly supported below the axis of the other spindle adjacent to the work-holding end of the latter and having a plurality of plane tool-holding faces in position to be rought successively into tangential relation to an arc concentric to the axis of the other spindle; means for rotating the turret and fixed spindle; means for actuating the other spindle; a plurality of stops corresponding in number to the number of tool-holding faces carried by and disposed in substantially concentric relation to the turret spindle; and i a fixture carried'with the other spindle arranged to cooperate with said stops for limiting the longitudinal movements of one spindle with respect to the other.

5. In a metal-working machine, the combination with a rotative work-holder supported for longitudinal movements and a rotative tool-holder, the latter of which has a plurality of working faces and is held as agalnst longitudinal movement, and with means for retracting and advancing the work-holder, of a luralit of independentlyadjustable stops ispose ,equidistantly in a common are about the axis of the toolholder; a stop abutment disposed on the work-holder in position to cooperate with said stops successively, whereby to'limit the advancing movements of said holder; means for adjusting said stops longitudinally of the axis of the toolholder; and actuating means in connection with .the tool-holder and effective for imparting corresponding rotative movements 1nconcentric arcs to said holder and stops concurrently, whereby to bring said stops successively into coop erative relation with said stop abutment.

6. A metal-working machine including a turret having meansfor securing thereto a plurality of tools, and havinga plurality of independently-adjustable stops one for each tool disposed abouttheaxis of, and fixedly connected with, said turret; means. for imparting concurrent rotative .movements to.

said turret and stops; a work-spindle carr er 'su ported for reciprocatory movements with re ation to the turret and astop abut-.

screwed into the rocating said carrier; awork-spindle mounted for rotation in said carrier; means for retating said spindle; and means for locking the turret at rest intermediate to intermittent rotations thereof and during the advancing movement of the work-spindle,

7. The combination with a work-spindle carrier supported for 'recipro'catory movements and having a stop abutment, and with means for reciprocating said carrier, of a turret having a plurality of tools, a plurality of stops corresponding in number to the number of tools disposed about the axis of, and

rotatable with, sald turret and located in a common are intersecting the path of the stop abutment; means for adjustin the stops independently in the direction 0 travel of the work-spindle carrier, and rotating means in connection with the turret.

'8. The combination with a work-spindle carrier supported for reciprocatory movements and having a stop abutment, and with actuating means therefor, of a turret, a multiplex stop device supported for rotative movements. below said carrier with its axis in parallelism with that of-the work-spindle and, having a plurality of stops connected with said turret and disposed to be brought independently into the path of said sto abutment, and also having means for a justing each stop independently in the direction of movement of said carrier, whereby the limit of the working strokes of the carrier may be arbitrarily varied.

9-. In a metal-working machine, the combination with the framework, of a bed having lon itudinal slideways; a horizontal external y-ta ered bearing formed integral with said be in advance of said slideways and having an axially recessed outer end wall; an externally threaded annular wear plate recess of the end Wall of the bearingand havingits outer face dis osed slightly in advance of the outer face 0 said en wall; an internally-tapered turret surrounding and fitting said bearing and having the inner face of its end wall in bearing engagement with the outer face of the wearplatej a flanged bearingcollar cooperative with the wear-plate and end Wall of the turret; a shouldered spindle extending through the collar and end wall of the turret and hava nut at the outer end whereby to draw the shoulder of said s indle in en agement with the inner face of t e collar an hold the turret against displacement longitudinally of the axis of saidbearing; and rotating means in connection with said turret.

10. In a metal-working machine, the combination with a bed having a slidewa of a horizontally dis ed conical bearing ormed l with sand bed and extending beyond the end of said slideway and also having a GI centrally recessed outer end wall at the sma end of the cone; a centrally recessed turret mounted for rotation on the turret bearing and having its inner face beveled to fit said bearing and-also having an end wall in juxtaposition with the end wall of said bearing; a wear-plate disposed between the end walls of the bearing and turret; and means for rotating said turret.

1 1. In a metal-working machine, the combination with a bed, of a work-spindle carrier supported for reciprocatory movements on said bed; means for reciprocating said carrier a work-spindle journaled in bearings on said carrier; and difierential-speed actuating mechanism in operative connection with the work-spindle and embodying means whereby the rotative velocity of, said spindle may be arbitrarily changed, and also'involving a plurality of band-connected sheaves and an oscillatory weighted tension device in operative connection with the band and effective, for holding the same taut irrespective, of the changes in position of the work-spindle carrier.

12. In a metal-working machine, the combination with a work-spindle carrier supported for reciprocatory movements, and

with carrier-reciprocating means, of a work-' spindle rotatably supported in said carrier;

I two loose clutch members journaled on said spindle for rotation with respect thereto and including respectively, a high-speed and a low-speed worm-wheel a fast clutch member splined to the spindle between said loose. c

utch members; means for shifting the fast clutch member into operative engagement with one or the other loose clutch members arbitrarily; two worms meshing, respectively, with the worm-wheels of the loose-clutch members and journaled in bearings on the spindle-carrier; and continuously operative Worm-rotating means including a plurality of band-.connectedsheaves, and a weighted tension device inoperative connection with the band and effectivefor holding the same taut irrespective of changes in position of the work-spindle carrier.

13. In a metal-working machine, the com bination with a work-spindle carrier supported for reciprocatory movements, and

with a work-spindle supported for rotation by said carrier, of differential-speed spindlewheel on said s indle; aworm meshing with actuatin mechanism in operative connection with sai spindle and consisting of a'wormsaid worm-whee and j ournaled in hearings on the carrier and having a sheave or band-wheel fixed thereto; means for actuating said coun-'- ter shaft a band extending around both bandwheels; and one or more idlers engaging said hand intermediate-the two'band-wheels and adapted for holding the band taut irrespective of the position of one band-wheel with emcee respect to the other, as determined by changes in positions of the work-spindle carrier.

bination with a reciprocatory carrier and with actuating means therefor, of a rotative work-spindle supported in said carrier; and

continuously operative rotating means in connection with said spindle and includingtwo rotative sheaves one mounted on the carrier and one mounted on the framework; a band connecting said sheaves; and a shiftable tension device in connection with said band.

15. In a metal-working machine, the combination with a work-spindle carrier and with means for reciprocating said carrier; of a work-spindle rotatably mounted 1n sald carrler; and rotating mechanlsm for sald work- -spindle consistin of a worm-wheel in cona band extending around and operatively connecting the two sheaves; an oscillatory Weight pivotally supported at one end on the frame and having at the free end thereof two idle wheels in engagement, respectively, with the two runs of the band, said weight and idlers constituting a tension device for the band and holding the same taut during recip-.

rocatory movements of the carrier.

16. In a metal-working machine, the combination with a rotative turret, and with actuating means therefor, of a work-spindle 1&1. In a metal-working machine, the com carrier supported for movements towards' and away from said turret; means for reciprocating said carrier; a work-spindle.rotatablgy mounted in said carrier; and continuously' effective rotating means in operative connection with said work-spindle and embodying a plurality of bandconnected vsheaves, and an oscillatory weighted tension device having one or more idle-wheels in connection with the'band and effective for holding the same taut irrespective of changes in positions of the work-spindle carrier.

17. In a metal-working machine, the combination with a reciprocatory work-spindle carrier and with actuatingmeans therefor, of a work-spindle supported for rotatio'n'in said carrier; two worm-wheels of different pitches loosely mounted for rotation upon said spinidle and having adjacent clutch faces; a

clutch splined to said spindle between the two clutch faces of the worm-wheels; means for reciprocating said clutch whereby to clutch one or the other worm-wheel to the spindle; two worms of different pitches meshing, respectively, with said worm-wheels and having theirshafts journaled in hearings on the carrier; a sheave or band-wheel fixed to each worm-wheel shaft; an-idle sheave rotatably supported on the carrier intermediate the other sheaves; a counter shaft journaled in the framework below the carrier and having a sheave fixed thereto; a band extending around the counter shaft-sheave and over and under successive sheaves on the carrier: :1 shift-able tension device in connection with the runs of the band and ell'eetive for retaining the same taut irrespective of changes in ositions 'of the carrier; and means for rotat mg the counter shaft. 18. In a metal working machine, the combination with a turret having a plurality of tool-holding faces, of a pluralitv of lock-bolt receiving members corresponding in number to the number of the. tool-holding faces, and adjustably supported for rotation with said turret; means for independently adjusting said .membersjn 'a common-arc concentric to the turret axis; a h ck-bolt supported for reciprmzatory movements in a fixed bearing on the machine. in position for entering'the receiving members successively on rotative movements of the turret; means for actuating the lock-bolt; and means for imparting rotativc movement to said turret. 19. In a metal-working machine, the combination with a rotative turret, of a plurality of turret-positioning members revoluble with the turret in a common are concentric to the axis thereof, and each having a lock-notch and also embodying means whereby the same. may be adjusted in said are with respect to theothermembers; aturretlocking-boltsu ported for reciprocatory movements paral el to the axis ofthe turret .and'in position .to successively engage in the lock-notches of the positioning members; and means for imparting rotative movements to said turret to bring the lock-notches of the positioning members sucwssivelyinto register with the lock-bolt.

20. In a metal-working machine, the combination with a rotativc turret, of a sprin,,-'

advanced bolt supported for reciprocatory movements parallel to the axis of said turret; a plurality of positioning-members revoluble in a common are concentric to the axis of said turret and each havin a locking face cooperative with the lock-bolt; meansfor independently adjusting the positionmgmembers with respect to oneanother in said common are; means for rotating said turret to bring the locking faces of the positioningmembers successively into cooperative relation with the lock-bolt; and retracting means for the lock bolt.

21. In a-metal-working machine, the combination with a rotative turret, of a sprin advanced lock-bolt su ported for reciprocatoryl movements para lel tothe axis of the turret; a pluralit of positioning-members revolublev with said turret in a common are concentric to the axis thereof and each having a locking face cooperative with the lockbolt; independent means for adjusting each positioning member with respect to the others in said common are; means for rotating said turretto bring the locking faces of the. lositioning-memhers successively into cooperative relation with the lock-bolt; retrm-ting-means for the lock-bolt; a plurality of stops disposed to revolve about the common axis of,'an'd with, the turret and turretpositlonmg members;independent means for adjusting each stop longitudinally of said axis; a work-spindle carrier supported for reciprocatory movemen't-s and having a stop abutment cooperative with said stops: and means for reciprocating said carrier.

22. In a metal-working machine, the (umbination with the bed thereof, of a workspindle carrier supported ou'said bed for reciprocatory movements.- and; having) a centrally disposed rack on the underside thereof and also having a stop abutment; a plurality of stops disposed substantially cqui-dist-antlv about a common axis and located in a common nrc inun'secting the path of the stop ahulnu-nt; means for revolving the stops abaul their common axis to bring them sueccssi rely intocooperative relation with the slap abutment on the carrier; a trauswrselw dispustd shaft having bearings in the bed and having a pinion meslnng with the rack: and means for rotating the pinion-shaft to advance and retract the carrier.

23. In a |netal-\ vorkmg machine, the combination with thebed. thereof, of a recip- 0 a spindlcsupported for rotative movements 05 below,- and extendingdongltudiimlly of said carrier and held against longitudinal movement; a plurality of mdependentl\'-adjustable stops supported su istantially equidistantly about the. axis of the spindle and 110 orbitally movable in a path intersecting the path of the stop abutment; and means for rotating said spindle to bring said stops successively into the path of the stop"abtitinent and limit the successive advancing move- 115 ments of the carrier.

24. The combination with work-holding and rotating means, of a rotative turret; a tool mounted on said turret for movement in the are of the circle intersecting the arc of 120 the work; means for advancing the turret and tool in the are of a circle to bring the. tool to an approximate working position and for subsequently advancing the tool in the are of a circle throughout its working stroke; 125

and adjustable means in connection with the turret for limiting the working stroke of the tool.

25. The combination with a longitudinally movable rotative work-holder, of a bed 130' haying a fixed turret-bearing enibodied therein and located undersaidwork-holder, a turretsupportedgby said turret-bearing and ---l 1el d v against endwise movement, and

means for-turning said turret. 1

26. The combination with a work-spindle and its carrier the latter of which hasa stop, of means for reciprocating said carrier, a turret havingits ,axis parallelwith that of the,;. work-spindle, means forturning said turret,

and a plurality of .stopsmova'ble in unison with said: turret and coo 'erative separately with said stop on the wor spindle carrier.-

27. The .colnbination with a work-spindle and its carrierthe latter ofwhich has a sto'p, of means for reciprocating sa1 d-oarrier,. a. turret having its axis parallel withthat of -the work-spindle, means for turning said turret,

and a plurality of stops movable in unison svpa with .said turret and independently adjustable longitudinally of the axis of the turret and 006 erative separately with said stop on the wor -spindle carrier. I

28. The combination with a work-spindle and with means for rptating the same, of a turret having itsaxis parallel to that of the work-spindle, means for turning said turret,

a stop controlling the extent of rotation of said turret, and a lurality of stops movable in unison with said turret and located in the path of said first-mentioned stop and adjustable to different positions in' said path.

' Signed by me at Hartford, Conn. this 2nd

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