US1056066A

US1056066A - Metal-working machine.

Info

Publication number: US1056066A
Application number: US63552111A
Authority: US
Inventors: Oscar A Smith
Original assignee: NAT ACME Manufacturing CO
Current assignee: NATIONAL-ACME MANUFACTURING Co; NAT ACME Manufacturing CO
Priority date: 1911-06-26
Filing date: 1911-06-26
Publication date: 1913-03-18
Anticipated expiration: 1930-03-18

Description

0. A. SMITH.

METAL WORKING MACHINE.

APPLICATION FILED JUNE 26, 1911.

1,056,066, Patented Mar. 18, 1913.

4 SHEETSSHEET 1.

I 'Q' i/, l i 1 l; l, I 1111 @IW UHU" I l I 1 1|| "ii I \l, 1

' I in i 1- t1 s 0. A. SMITH. METAL WORKING MACHINE. APPLIOATIN FILED JUNE 26,1911.

Patented Mar. 18, 1913.

4 SHEETS-SHEET 2.

Oscar Smdh @wi/Mmm@ o 1 0. A. SMITH.

METAL WORKING MACHINE.

APPLIOATION rILED JUNE 26, 1911.

1,056,066. Patented Mar.18,1913.

4 SHEETS-SHEET 3.

1759570' 0mm/1 anni.,

0. A. SMITH.

METAL WORKING MACHINE.

APPLICATION FILED 111111126, 1911.

Patented Mar. 18, 1913.

4 SHEETSA SHEET 4.

Witwe/eroe@ Il l) UNITED sT-ATEs PATENT oEEioE.

OSCAR A. SMITH, OF CLEVELAND, OHIO, ASSIGNOR TO THE NATIONAL-ACME MANU- FACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

METAL-WORKING MACHINE.

Speottloatton ot Letters Patent.

Patented Mur. 18, 1913.

Application tiled Jane 26g, 1911. Serial No. 685,521.

To all 'ie/iam. it may concern lie it known that I, Oscaa A. Sairrii. a citizen of the UnitedStates. residing at Cleveland. in the county of Cuyahoga and `*tate of Ohio, have invented certain new.

and useful Improvements in Metal'Work- 'ing Machines, of which the following is a specification.

This invention relates to metal working machines. and more particularly to auto` matic multiple spindle machines, the present improvement particularly comprising a` rliiiie by a suitable ma azine and fed to the rotary turret by one o the drills itself and partially drilled, the companion drills suc?v icssivel y drilling the blank or coupling from ilie point where the immediately preceding Adrill stopped, and in which, after the complete dril ing of the coupling the same is automatically tapped, the tap forininglthle' ant,

means for reinovin the com leted from the turret, an in which a so the blank or work carrying spindles will be rotated at ilic required slow speed to permit the propertiipping operation while at the saine time tlic work spindles and drills ai'e so rotated relatively to each other that the drilling op` crations will be riipidly effected and the loss' of time which would result by rotating the work spindles slowly to 4permit the tapping operation is avoided, and in which improved' machine safety mechanisms are also provided which will permitthe combined operations of drilling und tapping to be car-2 i-ied out in thc saine machine so that iu'ury and damage to the machine will be avoidedl should there be any imperfect feeding of the blanks or should the tap be unable to per` i'orm its proper work by the breaking of a drill, and in which also oil will be automatically fed during the tapping operationand automatically cut ofi' during the drilling tiperation.

In the drawings accom anying and form-f ing part of this speciticat on, Figure 1 lllus; trates a sideview-otthisiinproved machinel on the magazine'. side thereof, portions at` each end being broken away; Fig. .2 illustrates a similar view of the complete machine; Fig. 3 is a erspectivc view illustrating the rear end oiithe machine and the oil ing mechanism for the tap; Fig. 4 is a crosssectional detail view of a. portion ot' tlit` mechanism shown in Fig. 3; Fig. ."i is a sido view opposite to that shown in Figs. 1 and 2, illustrating a portion of the machine; Fig. (l is a cross-sectional View taken in line (i-('i. Fig. 1; Fig. 7 is ii detail view-0f a portion ol the clutch mechanism shown in Fig. (3; Figs. 8 and 9 are detail views, partly in section, illustrating the driving means for the cam shaft; Fig. 10 is a detail view illustratingr the tap mechanism; Figs. 11. 1Q, 13. 1l. 1i'. and 16 are sectional views illustrating the different positions of the drills and tap; Fig. 17 is a artly cross-sectional view and Fig. 18 a si e view illustrating in part the means for supplying a blank to the turretl chucks; Fig. 19 is a dctiiil view of a part ot such mechanism; and Fig. Q0 is a detail persiective view of a art of the mechanism siown in Figs. 5 an( 6.

Similar characters of reference indicate corresponding parts throughout. the figures of the drawings.

In a machine of the character referred to .it is necessary, in order to use. a non-rotatable tap, that the work spindles carrying the blanks shall rotate at a relatively slow speed to permit the proper tapping oieration. This slow s eed of the work spindles. however, wouldp result in considerable loss ot' time during the drilling operation. and therefore, in order to avoid this loss of time it is essential that the machine lie so organized that notwithstanding tlie rclativel)Y slow speed of the blank or work spindles` the product of the machine will not br ieduced by reason of this fact, and it is also essential in an organization ot this character, that damage and injury to the machine will not result should the blanks not be fed )ro erly or the drills break ofi' during.,r the ril ing operation. To provide such a inachine is therefore the gist of the present iinprovement.

.. In the embodiment shown the opcratiiii.r

mechanisms are carried upon a suitable licd or hase 2. l`lie rotary turret or work spiadle indexing mechanism comprises a rotary fltl lili

turret or cylinder 3 carrie/d by a casing 4 fixed to the bed and having the usual locking bolt mechanism 5 for holdin(r the turret or eylnder stationary on eacli indexing thereof. Carried by this turret or cylinder are a plurality of work spindles shown as four in number, rot-ated b means of gears 7, one carried by each of tie spindles and in mesh with a ar 8 carried on the spindle shaft t), whci .extends through the drill slide and to the opposite end of the machine, having fixed thereto at this pointu suitable driving pulley 10 carryin a bevel gear 11, which bevel gear is in mesii with a bevel gear 12 mounted on a shaft havinga bevel gear 13 at its opposite end and in mesh with a bevel pinion 1-'1 mounted on a shaft 15 supported transversely in the bed of the machine, and which shaft, by means of a suitable sprocket chain and change gearing (not shown) iniparts motion to a worm shaft 16, the worm 1i' of which is loosely mounted thereon for the purpose hereinafter explained, and which worm is in mesh with a worm wheel 1S fixed to the cam shaft 10.

'lhe turret or cylinder is rotated or iudexed from the cam shaft 1t) by means of a fan gear fixed to the shaft and the teeth of which gear are in mesh with teeth 21 carried by the c linder or turret, whereby the turretl is intexed at )redeterinined intervals. Each of the worlt spindles is provided with a blank receiving chuck opened and closed by suitable cam mechanism 22 carried by the cam shaft 19 in the usual manner. On the worm shaft 16, u on which the worm 17 is loosely mounte is located a pair of

clutch members

22 and 23, the clutch member 22 being keyed to the shaft 1G und slitting thereon and having the usual groove 24 for the )urpose hereinafter specified, while the clutci member 23 is fastened to the loosely mounted worm 17, it having a suitable bearing in the bed of the machine. From this it follows that when the clutch members are in en agement the worm will be rotated and there y the worm wheel. to impart motion to the cam shaft but when out of engagement the worm will he idle and therefore the rotation of the cam shaft ceases. The ur ose of this organization will be ex laine hereinafter.

Mounted u )on the d of the machine is a sliding too carrier bored to receive three

tool spindles

81, 82 and 88 located in line with three of the work spindles 6 when in their working iosition. In these tool spindles are secure drill holders 84. For rotating these drill holders 84, located in step formation, thatfis to say so arranged that one drill will project beyond a companion drill there is housed on the spindle .shaft t) a sli ing gear in mesh with a s ur gear 36, which is keyed toashaft 87 having a bearing in a bracket 38 secured to the sliding tool carrier. .On the opposite end of this shaft 3'( is keyed another spur gear 39 in mesh with a gear 40 keyed to drill spindle 31. A gear 41 is keyed to spindle 33 and a gear 42, carried by a stud 43, is in position to mesh with gears and 41, and a gear 44 is keyed to s )indle 32 and is in mesh with gear 3 9. This method of gearing 'drives all three drill spindles right handed from the Spindle shaftl t), which runs through and has its bearing, as hereinbefore stated, in the turretA or cylinder 3 and carries the gear 8 in mesh w1th the spur gears T earried by the work spindles` 6, thus driving the work s indles in the opposite direction from the rill spindles, so that the work spindles can be rotated at a speed to suit the ta J hereinafter referred to, while the drill spindles can be rotated at a greater lspeed to suit the drills` this being ell'ected b v changin the gears carried by the tool slide. ln ot 1er words, the work spindles must4 be rotated at a sutiiciently slow speed lo permit the tup to run easily and cut through the blank, as a steel tap cannot be run iii at. a i

high speed, there being a fixed standard at which the work spindles can be rotated to permit the proper ta )ping 01m-ations,A and therefore, as Stated, the work spindles must be run slowly in order to permit the tappingr operation t'o be effected; but in order to drill at a high speed and thus turn out the product quickly, the drills are run in the opposite direction and faster than the work spindles are run thus givingr a much greater speed than could otherwise be obtained.

On the tool slide or sliding tool carrier 30.y under the drill spindle 32, n slide 5() is gibbed in the usual way. (.)n this slide is a long bearing 51 bored in line with one of the work spindles when the cylinder is in its workin" position. This bore is hushed to Suit tlie diameter of the work blanks to be ta ipod. .-\t the rear end of this slide is pivoted a swinging bearing also bored to the size of the work blanks. These two bearings l and 52 hold the curved tap 58. This swinginlr bearing 52 is essential in order to relieve t ie strain on the tap when the completed work blanks are passing over the Shank of the ta i. "he action of this bearing can be plainly observed in Fig. 1t). In other words, when a blank is passing over the threaded portion of the tap it comes into contact wit-h a blank that has previouslit been threaded and passed over the threaded portion of the tap, so that eventually the shank of the tu i will be completely inclosed with completed or tap )ed blanks. Each blank passing over the tlireaded portion of the tap and coming into contact with a blank that has just previousl passed over the tap` has to make room for itself on the. shank ot? the tap by forcing the blanks ahead of it. the length of a blank. If the tap remained itl() in its neutral position during the tapping operation in. the bearings 51 and 5'2, which neutral position is central with the bores of such bearings. there would be no advantage in having the bearing 52 swing, but as the tap passes through the blank it causes the. curved end thereof to advance laterally the length ot the threaded portion of the tap, which would cause it to cramp in the bearing 52 so that the blank would not be allowed to freelw1 pass over 'the shank of the tap; but by having this bearing swing it automatically changes its position of alhiement with the travel of the tap, thus relieving the cramping of the'blanks when they are passing over the shank of the tap. The tap slide 50 is operated toward and from the turret by means of a lever (30 and a suitable stud 61 and roller (32 engaged by`a cam on the cam drum mounted on the cam shaft 1t) hereinbefore referred to. The end of this lever 60 is vlocated between an extension 63 on the slide 50 and a spring plunger 64 carried by the slide, so thatI when starting the tap into t-he blank the slide 50 pushes against the plunger 64 and avoids all danger of spoiling'the threads in the work blank.

Fronrthe foregoing it will be observed that although the tap slide is carried by the tool carrier or slide it also has a movement independently thereofs at the proper time to permit the tapping operation, and that by means of the swinging or .swiveled bearing 52 the tapped blanks can be properly fed from the curved shank of the tap without. any cramping thereof. the tap thus operating not only to tap the blanks, but to feed the same from the chuck of the work spindle when such chuck is opened at the proper time. by the mechanisn'i liuovided for that. purpose. thus obviating the use of any ejecting mechanism for ejecting the completed blank.

.The feeding mechanism for feeding the blanks successively to the chucks of the work spindles comprises a maga-xine Ttl carrying' the cut ott blanks. The lower end of this magazine is secured to a housing 7l doretailed to thel main hed of the machine for novement toward and from the turret. ln his housing, and supiilortt-d to .slide easily t right angles to the axis @fthe wort; spindles, is a .slide 712i. t a snitaale dis tance from the inner end of this slide 73 is bored`a hole 74 having the saine diameter as the work blanks. which hole is located in exact aliuement with one of the work pindles when the turret in its stopped "position and with a drill in the drill spindle A slot' is machined in the end et' this slide to communcatt with the hole. and which slot is slightly larger in liameterthan qu du.

lthe drill to allo-p it te pass over the drill when the drill is oprit-.ting on the'work or blank in the work spindle. In the housing 7l, at the required distance from the front. end thereof and at right angles to the slide 73, is bored a hole 7G of thesamediameter as the work blanks, which hole will be in alinement with the hole 74 in the slide 7? when the. latter is retracted, and over this hole 76 the blank carrier or magazine 70 is belted so that the work blanks will successively drop into this hole 76 of the housing.

7l and not interfere with the working of the slide 73. For pushing the blan-ksfrom the hole oropening 7G in the housing into the hole or opening of the slide 73 a suitable plunger 77 is supported on the bed in alinement with this hole 76. To the-outer end of this plunger is fastened a lever 78 pivotally supported on the bed of the machine. and which l'ever is operated by a cam 79 on a cam drum carried by `the cam shaft, b v means of which the plunger will be operated atl the proper time-to push a blank into the slide 73, a lsuitable .spring 8() being provided on the plunger for returning the plunger or rod to its normal position.

For operating the slide 73 a slotte( bracket 81 is bolted to the bed of the machine. One end of this bracket is extended downward and carries a pivoted lever 82 on the lower end of which is fastened a short lever 83, the opposite-end of which is secured to a master lever 84, which level 84 is pivotally supported at its upper end by a` bracket 85 secured to the bed of the machine, while its lower end carries a roller 8G in posit-ion to contact witl'ra suitable cam 87 carried by a cam drum 88 on tl e cam shaft i9, see Fig. 17. ,The upper end of the lever S2 is crotched to receive'a slotted link 89, the opposite end of which link Si) is pivotall)r secured to the slide 73 atI the outer end thereof.' Honsed in the crotched end of the lever 82, see Fig. 1), are two

spring phmgers

90 and 91, the inner ends of which are adapted to engage depressions 02 and 93, one on each side, in the end of the slotted linkSt), and thus form the connecting means between the lever 82 and the slotted link. The springs of these plungers are strong enough to withstand the strain of feeding' the slide 73 to its proper position. Should the slide 73 clog the plungers will be forced out of the depressions so thatv tht` lever 82 can move forward in the s'lot of the link and thus allow the plungers to lslide freely in the slot without operating the slide 73. On thereturn of the lever 82 the plungers will automatically project into the depressions in f the sides of the slotted link, thereby again ft'irluing a proper connecticn. This mechanism thus avoids the breaking,r of'the parts due to any imperfect feeding of the blanks intov the bore or opening ofthe slide 7?.

To the, bed of the machine. on the tap side thereof. is doyetailed a bracket 100, to which bracket is pivoted a lever 103, to the front end of which is fastened a plate104 directly in fro-nt of the work spindle. On the other end of this lever 103 is fastened a tapered steel inclined shoe 105. Secured to the bed of the machine are

brackets

106 and 107, in which is housed a shaft 10S, on one end of which is fastened a lever 109 having a roller 110 in contact with the inclined steel shoe 105. A clutch lever 111 is fastened to the shaft 108 and engages in the groove 24 of the sliding clutch member .22 keyed to the worm shaft 16.

From the foregoing it will be observed that should a piece of wor-k not be removed from the work spindle by the tap, as for i n` stance should the tap .be prevented from passing through the blank by the breaking of the drill so that the tap cannot remove the blank from' the chuck upon the indexing of the cylinder', this imperfect work blank will come into contact with the lever 103, which will thus operate? the shaft 108 andl disconnect the clutch members 2*2 and Q3 and thus preventthe cam shaft from turning and so prevent further rotationfof the turret or cylinder, and consequently prevent breakage of the several parts, for instance thc feeding mechanism and any of the drills. In other words, on the stoppage of the -cam shaft the operation of all the mechanisms dependingr upon it are also stopped.

For supplying the proper quant-ity of oil `to each of the w'ork spindles as they are successively brought into tapping position each of the four spindles is .provided with a housed bronze bushing 115 drilled wit-h a 'suitable countersunk hole 116 to receive the tapered end of a plunger 117 carried by a suitable bearing 11S supported at. the rear end of the bed. lnto the Vbearing `11S is tapped an oil-conveying pipe 119. The plunger 117 is provided with an axial open.- ing from the .'front end thereof and with a cross-hole communica-ting therewith, which cross hole, when t-he plunger projects into the bronze. bushing,r of a work spindle, is in communication with the end of the oil-,supply pipe 119, so that oil will then be allowed to tiow from pipe 110 through the plunger 117 into the spindle. To the outer end of the plunger 117 is Afastened a. slotted lever 120 by means of a pin 121. The lower end of this lever 120 is pivoted to a bracket- 122 on the bed of the machine, and by means of a cam 123 on a'cam drum 124 and a con necting member 125 and spring 126 the pl ncylinder has been indexed, when it enters the next succeedlng spindle, the oil being shut ott automatically during the interval by reason o f the fact that the plunger is moved away from the oil-supply pipe tapped into the bearingr 118. s the blank has been completely drilled or bored when it is car! ried by the turret to the tapping position, it follows that the oil supplied at the rear end of the spindle, when the blank is in its tapping position can flow through such spin dle and the blank and s0 flush the latter and clear it of chips and pieces of metal and alsoract upon thethreaded end of the tap A as it penetrates the blank, and so maintain the same thoroughly lubricated at the point. where most needed, namely at the end of the tap within the blank.

In operation, the rod or plunger 77 having pushed a blan'k from the opening or hole in the housing 71 into the opening or hole of the slide 73, the slide 73 is caused to advance through the medium of the levers 82, 83- and Stand the cam mechanism provided for operating these levers, until the blank is inalineinent with the lower work spindle atone side of the turret. vThe tool slide is then rapidly advanced .by the usual cam mechanismprovided on the cam shaft for that purpose, whereupon the drill in the drill spindle pushes the work blank from the slide 73 into the chuck of the work spindle,

which chuck has of course been opened or released by means of the usual cam provided for thispurpose, whereupon the chuck is closed to grip the work blank. When the blank has been properly* gripped by its chuck the continued rapid advance of the tool slide. is retarded to the speed possiblev to enable the drill to drill the work blank. These two speeds are regulated by means of cams onA the cam drum on the cam shaft. In the meantime the slide 73, through the levels hereinbefore referred to,Y is withdrawn to its loading position.` The cam on the cam drum for operating the tool slide hasA a lead that-will carry t-he drill one-third way throngr the work blank. When the tool lslide h s advanced to the extreme length of tra vel the ca is .returned rapidlyv by ineans of on the cam drum to its lnltia-lposi` -tion and the cylinder is indexed in the usual way, thus bringing this same work blank which has been drilled one-third the distance thereof into' line* with spindle 31, whereupon the tool slide4 isagain advanced in the manner hereinbefore explained, while the drill xin spindle 31 starts to ,drill where 'the drill'in'spindle 33 left ott, thus-drilling into the blank by the means provided for that purpose, and when the threaded portion of the tap has passed through the vwork blank the .chuck ofthe work spindle is opened iii the usual manner, thus allowing .the work slide to. recede to its initial position, the tap reiiio'vin;r theblank from the work spindle. 'lhus the complete indexingof the spindle and the succeeding advancingr and retracting of the tool slide with its phiralitypof drills, one projecting'. beyond another, results in .one complete drilled and tapped blank at each complete indexing of the cylinder, whilethe successively tapped blanks are withdrawn from the work spindles and discharged from the free end of the curved tap shank.

)f course 'it will be understood that while one drill is drillingr a third of the way into a blank a companion drill is drillingr a prei vionsly drilled blank from the point where 30.

drillingr another blank from the 'point where the second drill left off, and that while thesedrillingr operations are -goiiigun at a relatively rapid speed by reason of the` fact that the drills are rapidly rotated in one direction whilethe work blanks are rotated in another, the tapping operationin the ,fourth A work spindleis also proceeding, thework spindles, however, being rotated sufficiently slow to permit the proper effective operations of the tap, the successive drilling operations occurring, the first at Ythe bottom of the turret at tliesaine side as that on which the magazine is located, the second at the top of the turret at the sume side as the magazine, the third on the opposite side of the magazine at the top, while the tapping operation takes. place at the bottom of the turret. on the. side opposite to the magazine. 'lhus il'will be observed that the tirst drill not only drills the blank through one-third thereof, but that this drill also actS to feed the blank into the'chiick, pushing the blank -froni the slide 73 into the chuck to permit the same. to be gripped and then continuing to drill the blank through onetliird thereof. Y y i By the present improvement l am enabled materially to increase the quantity of the product. of the machine. Y

'ln operation, as soon as the tap has coinpleted the. tapping operation it starts back and pulls the blank from the chuck, which is opened to permit this t'fbe done, this retracting moiiement ofthe tap being inde- .pendent of the retracting. movement of the tool slide. By using one of the drills as the.

means for feeding or pushing the blanks into the chuck it makes it'possible to d0 away with an independent plunger to push ythe. blanks into the chuck,'and thus enables another drill to be used in the machine, fortlie reasonthat when a plunger is used no tap in its bearings. l

YI- claiin as my invention:

1. In a machine of the class described, the

combination of a turret having a plurality work can be done upon the. bla-nk uiitil the blank is indexed to a'sueceeding-position. By having the tapl formed with a. curved 'shank it will be understood-that theta-plied- .blanks form the means forsupporting `the' I of work spindles* adapted to carry'blanks, means for. indexing the turret, ine-ans for f rotating the work spindles in one direction at a relatively slow speed, a sliding `tool carrier carrying a plutool carrier, means for rotating the tools in a. direction opposite to the direction of rota; tion of the work spindles and at a relatively rapid speed as conipared'with the -speed of the work spindles, wherebye 'the Qcutting vspeed of the-'tools is increased not.` the first drill left oil", while another drill withstanding the decreased rotation of the g' work spindles, and 'means for threading each successive blankat. the speedat which said. 'blankisroitated l i 25111 -a machine 'of the class described, the. icoinbination of' a turret Vhaving'aA plurality of work spiiidlesadal'ited to carry blanks, means for indexing the fturret, means for rotatingfthe work spindles in one direction ata relatively slow speed,'a sliding tool'ca'rjrier carrying a plurality` of tools, means for reciprocating. the tool carrier, means for rotating the tools in a. direction oppositc,to the direction of rotation -of -rality of tools, means for reciprocating said 1 the work spindles and at ii relatively rapid f speed ascoinpared with the of 4the. work spindles, whereby the cutting speed of .the tools is increased notwithstanding the decreased rotation of the work spindles, and

means for tapping each successive blank at the speed at which saiilblank is rotated 'and comprising a tap and means for operating the saine, the tapv being effective to withdraw the tappedV blank from its work spindle and for discharging the same from the. free end thereof.-

3. ln a machine of the class described, the combination ofa turret having a plurality of work spindles adapted to carry blanks,

means for indexing the turret., nieans'for rotating the work spindles in one direction at a relatirel y slow speed, a sliding tool carrier carrying a plurality of tools, iiieaiis for` reciprocating the tool carrier, means for rotating the tools in a direction opposite'to the direction of rotation of .the work ino spindles and at a relatively rapid speed as compared with t-he speed of the. work spindles, whereby the cutting speed of the tools is increased notwithstanding the decreased rotation of the work spindles, and means for tappingv each successive blank at the speed at which said blank is rotated and comprising a curved ended tap, means for operating the same, the tap being effective to withdraw the tapped blank from its work spindle and for discharging the same from the free end thereof, and swinging means for supporting the curved end of the tap 'thereby t-o preventl the cramping of the blanks as they pass along the tap.

4. In a machine of the class described, the combinationof a turret having" a Iplurality of work spindles adapted to carry blanks, means for indexing the turret, means for rotating the work spindles, a sliding tool carrier carrying a plurality .of tools set one in advance of another, means for locating a blank in position relatively to each of the work spindles, means for reciprocating said tool carrierso that the most advanced tool will feeda blank to the work spindle, and means forrotating'the tools'.

ln a machine of the class described, the combination of a turret having a plurality of work spindles adapted to carry blanks,

,means for indexing'the turret, means for rotating thcI work spindles, a sliding tool carrier carrying a plurality of drills set one in advance of another, means for reciprorating' said tool carrier, means for rotating the drills, and means for tapping each successive blank and comprising a curved ended tap, means for operating the same, the

tap being effective to withdraw the tapped blank from its work spindle and for discharging the same from the free end of the tap, and swinging means'for supporting the curved end of thetap thereby to prevent the cramping of the blanks as they pass along the tap.

6. In a machine of the class described, theY combination of 'a rotary turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret,

means for rotating the work spindles, a sliding tool carrier carrying a plurality of drills setone in'advance of another, means for locating a blank in alinement with a Work spindle and with one of the drills', and means for operating the tool carrier whereby one of the drillswill feed ablank to a work spindle and drill .theblank part way therethrough, the companion drills operatA ing from points where the preceding drills 7. ln a machine of thc class described, the combination of a rotary turret having a plurality of work spindles adapted to carry blanks, means for I means for rotating the work spindles, a sliding tool carrier leit indexingr the tnrret.`

carrying a plurality of drills set one 1n advance of another, means for locating a blank in alinement-with a work spindle and `with one of the drills, means for operating the tool carrier whereby c-ne of the drills will feed a blank to a workspindle and drill the blank part way therethrough, the companion drills operat-d ing from' points wherethe preceding drills left ofi', and means for tapping each successive blank 8. ln' a. machine of the class described', the combination of a. rotary turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret, means for rotating the work spindles, a sliding tool carrier carrying a plurality of drills set one'in advance of another, means lfor locating a blank in alinement with a work l.spindle and with one of the drills, means for operating the tool carrier whereby'one of the drills will feed ajblank to a work spindle `and drill the. blank part wayI therethrough, the companion ldrillsvroperat-` ing from points where the preceding drills off, and means for tapping each' successive blank and comprising a curved ended tap, means for operating the same, the

tap being' effective to withdraw' the tapped blank from its work spindle and for dis* charging the same from thefree end of the tap, and' swinging means forsupporting the curved end of the tap thereby to. prevent the cramping of the blanks as they pass along the tap.

9. in a machine of the class-described, the' relatively rapid speed as compared with the 'i speed of the work spindles, whereby the cut ting speed of the tools is'v increased notwithstanding thef decreased rotation of the work spindles, and means for threading each successi-ve blank at the speed at which said blank is rotated. Y

10. ln a machine of the class described, the combination of turret having a plurality of work spindles adapted to carry blanks, means for' indexing the turret, means for rotating the work spindles in one direction at a relatively -slow speed, a sliding tool carrier carrying a plurality of, tools set one in advance of another, means for reciprocating said tool carrier, means for rotating the tools in a direction opposite to the dirccticn of rotation of the work spindles and at a relatively rapid speed as LSL) compared 1 with the fspeedf offthe work spinsdles, wherel'iythc cutting speed of then-tools is increased notwithstandinfl the deereasedf blank,- meansl for-'f indexing" the turret,

means forrotatingthe work spindles in: one direction at a 4relatively slow,` speed,=al slid-- set one inadvance-ofianother, means for reciprocating said toolqearrier, means for rotating the tools 'in' a direction opposite to the direction of rotation of the work spindles and at'a relatively-ra id speedas compared with the speed of t 6 work spindles, whereby the cutting s eed of the' tools is increased notwithstandin the decreased ro tation of the work spind es and means for tapping each successive blank at the speed at which said blank is rotated and comprising a tap and means for operating the same, the tap being effective to withdraw the tapped blank from its work spindle and for discharging the same from the free end thereof.

12. In a machine of` the class described, the combination of a turret having a pluralit of work s indles adapted to carry blan rs, means for indexing the turret, means for rotating the work spindles in one direction at a relatively slow speed, a sliding tool carrier carrying a plurality of tools set one in advance of another, means for reciprocating said tool carrier, ineiins for rotating the tools in a direction opposite to the direction of rotation of the work spindles and at a relatively rapid speed as compared with the speed of the work spindles,whereby the cutting s eed of the tools is increased notwitlistandin the decreased rotation of the work spin les, and means for tap in each successive blank at the speed at w ic i said blank is rotated and comprising a curved ended tap, means for-:operatin the same, the ta being etl'ectiveto with raw the tapped b ank from its work spindle and for dischar ing the same from the free end thereof, and swingin means for supporting the curved end of tie ta thereby to prevent the cramping of the b anks as they pass along the tap.

13. In a machine of the class described, the combination of n. turret-having a plui'ality of 'work spindlesadapted to carry blanks, means for indexing the turret, means for rotating the work-spindles in one direction at a-relatively slowY speed,qa sliding tool carrier carrying-.ial plluralityaofstools set one inadvanceo anot er, means-forl reciprocating the tool carrier, means for' rotating the tools in a direction opposite to the di- 'ralit blan is, means for indexing the turret, means reciprocatin jtatin the the irection of rotation of the work spin- `pared with the speed of t i'cotion of rotation of the work spindles and at a relatively rapid speed as compared with the'speed of the work spindles, whereby the cutting s eed of the tools is increased notwithstail ing the decreased rotation of the work spindles, means for locating a blank in'alinement with a work spindle and with loriel of the tools whereby ou the toi-ward -movement of the sliding tool carrier the tool will feed the blank to the work spindle,

' and-means for tapping each successive blank l 'yat the'speed at which said blank is rotated. ingtoolcarrier carrying a plurality of' tools 14.` In ainachine of the class described, the combination of a turrethaving a plufralityof work spindles adapted to carry blan {s,f-means for indexing the turret, means for rotating the work spindles in one direction at a relatively slow speed, a sliding tool carrier carrying a plurality of drills set one in advance of another, means for reciprocating the tool carrier, means for rotating the drills in a direction opposite to the direction of rotation of the work spindles and at a relatively rapid speed as compared with the speed of the work spindles; whereby the cutting speed of the tools is increased not-withstanding the decreased rotation of the work spindles, means for locating a blank in alineineiit with a work spindle and with one of said drills whereby said drill will feed the blank to the work spindle and drill the blank (part way theretirough, the companion rills operating;r from points-wliere preceding drills left. oil', and means for tap ing each successive blank at the speed at wliich said blank is rotated and comprising a curved ended tap, means` for operating the saine, the ta i being et'leetive to with( raw the tapped blank from its work s indle and for discharging' the saine from t e free end thereof, and swinging means for supporting the curved end of the tap' thereb to prevent cramping of the blanks as tliey pass along the tap.

v15.*In a machine of the class described, thecombination of a turret having a plu of A work spindles adapted to carry for rotating the work spindles in one direct-ion at a relatively slow speed, a sliding tool carrier carrying a plurality of drills set'one in advance of another, means for the tool carrier, means for rorills in a direction opposite to dies and at airelatively rapid speed as coniie work spindles` whereby the cutting speed of the too s is increased notwithstanding the decreased rotation of tli'e work spindles, means for locating `ablank in alinemeiit with a work spindle and with oneof said drills whereby said drill `will feed the blank to the work spindle and drill' tlie blank part way therethrough, `the companion drills operating from points where preceding drills'lefti-"o, means for tapping each `successive blank at the., speedA at which said blank is rotated'aiid comprising a curved en ded tap,- means -forfoperating the same, the ta ibein effective'l to withdraw the ta ed lank rom its work s indle and for iscliarging the saine from tie free end thereof Swingin means for supporting the curved end of t e tapv thereby to prevent cramping ofthe blanks as they pass along the tap, and means operated by an unextracted piece of work for throwing a part of the driving mechanism out of operation on the failure of the tap to extract such piece of work.

16. In a machine of the class described, the combination of a turret having a pluralitv of work spindles adapted to carry blanks, means for indexing the turret, means for rotating the work spindles in one direction at a re atively slow speed, a sliding tool carrier carrying a lurality of drills set one in advance of anot ier, means for reciprocating the tool carrier, means for rotating the drills in u direction opposite to the direction of rotation of the work spindles and at a relatively rapid speed as compared with the speed of the work spindles, whereb the cutting s )eed of the tools is increase notwithstanding tlie decreased rotation of the work spindles, means for locating a blank in alineineiit with a work spindle and with one of said drills whereby said drill will feed the blank to the work spindle and drill the blank iart'way therethrough,the companion dri ls operatin from points where preceding drills left o means for tap in each successive blank at the speed at w ic said blank is rotated and comprising a curved ended tap, means for operating'the same, the ta) being effective to withdraw the tapped blank from its work spindle and for discharging the sinne from the free end thereof, swingin means for supporting the curved end of tie ta thereby4 to prevent cramping of the blanltts as they pass alon the tap, means operated by an unextracte piece of work for throwing 'a part of the driving mechanism out of operation on the failure of the tap to extract such gieceof work, and means for preventing t e feeding of a blank should the feeding mechanisin become clogged.

17. In a machine of the class described, the combination of a rotary turret having a plurality of work spindles means for mdexing the turret, meansl orrotating the spint] es, a sliding tool carrier carrying a plurality of tools set one in advance of another, means for locatin a blank'in valinenient with a work spind e and with one of the tools and includin driving means therefor, means for operating the tool'carrier so that the most advanced tool will feed a blank to a work spindle and operate thereon, the companion tools operating from points where the preceding tools left olf, and

means permitting the blank locating means to be ineffective and to remain stationary should the same become clogged, without interfering with the operation of such driving means.

18. Iii a machine of the class described, the combination of a rotary turret having a ilurality of work spindles, means for inilexin the turret, means for rotating the s ind es, a sliding. tool carrier carrying a p urality of drills set one in advance of another, a magazine for carrying blanks, sliding means for feeding blanks successively in alinemeiit with one of the work spindles and wit-li one of the drills and including drivin means therefor, means for operating the too carrier whereby one of the drills will feed a blank to a work spindle and drill the blank part way therethrough, the conipanion drills o eratin from points where the preceding d[iills lefyt ofi', and means for perniittin the sliding blank feeding means to be. ine ect-ive and to ren'iain stationary should the same become clogged, without interfering wit-li the operation of such driving means.

19. ln a machine of the class described, the combination of a rotary turret having a )lurality of work spindles, means for indexing the turret, a sliding tool carrier carrying a plurality of drills set one in advance of another, means for locating a blank in 4ulinement with a work spindle, means for olpernting the tool carrier whereby one of t ie drills will feed a blank to a work spindle and drill the blank part way therethrough, the companion drills o )erating from points where the preceding drills left oil, a tap for tapping each successive blank and extracting the same,'and means operated by an un extracted piece of work for throwing a part of the driving mechanism out of operation on the failure of the tap to extract such piece of work.

20. In a machine of the class described, the combination of a turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret, a sliding tool carrier carrying a plurality of tools set one in advance of another, means for reciprocatin the tool carrier, means for lo eatin a b ank in alinement with the work spin e and with one of the tools whereby said tOOl will feed n blank to the work s indle and operate upon the same part way t erethrough, the companion tools operatin from points where the preceding tools le t otl, means operated by an unextracted iece of work for throwing a part of the riving mechanism out of operation on the failure of the tap to extract such piece of work, and means for tapping each successive blank and comprising a tap ctlcctive to withdraw the tapped blank from its Work spindle and for discharging the same from the tree end thereof.

21. In a machine of the class described,

the combination of a turret having a plural-` ity of work spindles adapted to carry blanks, means for indexing the turret, a slid` means for indexing the turret, a sliding toolcarrier carrying a plurality of tools, means for reciprocating the tool carrier, means for rotating the too-ls, means 'for tapping each successive blank and comprising a tap, means for opera-ting the same, and means for automatically supplying oil to each Work spindle from the rear end of such spindle during the tapping operation.

23. In a machine of the class described, the combination ot a turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret, a sliding tool carrier carrying a plurality of tools, means for reciprocating the tool carrier, means for rotating the u'ork spindles or the tools, means for tapping each successii'e blank and comprising a tap and means for operating the same. and means for automatically supplying oil at the rear end of each Work spindle during the tapping operation and for cutting ott the same during the indexing of the turret.

24. In a machine of the class'described, the combination of a turret having a plurality of work spindles, each provided with an opening therethrough and adapted to carry `a blank, means for indexing the turret, a

sliding tool carrier` carrying a plurality of tools, 'one or more effective to penetrate entirely thro-ugh a blank, means tor reciprocating the tool carrier, means for rotating the work spindles or the tools, and means for automatically supplying oil to each work Aspindle at the rear end thereof and for cutting oil' such supply during the indexing ot' the turret.

25'. In a machine of the class described, the combination of a rot ary turret having a plurality of Work spindles adapted to carry blanks, means for indexing the turret, a` sliding tool carrier carrying a plurality ot tool` spindles, Imeans for reciprocating the tool carrier, means for rotating certain spindles, means for tapping each successive blank and comprising a slide and a tap carried by the tool carrier, and means for automatically advancing the tap slide and tap independently of the tool carrier to start the same into the Work. 'f

Q6. In a machine of the class described, the combination of a rotary turret having a plurality of Work spindles adapted to carry blanks, means for indexing the turret, a sliding tool carrier carrying a plurality of tool spindles, means for reciprocating the tool carrier, means for rotating some of the spindles, means for tapping each successive blank and comprising a slide and a tap carried by the tool carrier, and means for advancing the tap slide and tap inde )endently of the tool carrier, the tap' being e ective to withdraw the tapped blank from its work spindle and for discharging the same from the free end thereof.,

27. In a machine of the class described, the combination of a rotary turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret, a sliding tool carrier carrying a plurality of tool spindles, means for reciprocating the tool carrier, means for rotating some of the spindles, means for tapping each successive blank and comprising a tap carried by the tool carrier, means for advancing the tap independently of the tool carrier, the tap being effective to withdraw the tapped blank from its work spindle and 'for discharging the same from the free end thereof, said tap having a curved ended shank, and swinging means for supporting the shank of the,tap thereby to prevent the cramping of the blanks as they pass along the tap.

28. In a machine of the class described, the combination of a rotary turret having a plurality of work spindles adapted to carry blanks, means for indexing the turret, a sliding tool carrier carrying a plurality of tool spindles, means for reciprocating the tool carrier, means for rotating some of the spindles. means for tapping each successive blank and comprising a tap carried by the tool carrier, means for advancing the tap independently of the tool carrier,a.nd means for automatically supplying oil to each of the work spindles from the rear end thereof during the tapping operation' and for cutting off such supply during the indexing operation.

.QEL In a machine of the class described, the combination of a rotary turret having a plurality of rotating work spindles adapted to carry blanks, means for indexin the turret, means for rotating the Work spindles iu one direction. a sliding tool carrier carrying a plurality of drills set one in'advance of another, means for reciprocating the tool carrier, means for rotating thedrills in a direction opposite to the direction of rotation of the Work spindles, means for tapping each successive blank and comprising a tap supported for movement with and independently of the tool carrier, means for operating the tap, means for automatically supplying oil tothe rear end of the work spindles suceessively as each is brought into the tapping position, a magazine for holding blanks,

where the preceding drill left off.

'30. In a machine of the class described, the combination of a rotaryV turret having a plurality of work spindles, a cam shaft, means carried thereby for indexing the tur` ret, a sliding tool carrier carrying a plurality of'tools, means carried by the earn shaft for reciprocating the sliding tool carrier, a worm wheel on said shaft, a worm shaft, a wormloosely mounted thereon and in mesh with said worm wheel on the cam shaft, a pair of clutch members mounted on said worm shaft and one fastened to the worm thereof, and means for disconnecting the clutch members thereby to stop the rotation of the cam shaft on the breakage of a tool or part.

31. In a machine. of the class described, the combination of a rotary turrethaving a plurality of work spindles, a cam shaft, means carried thereby for indexing the turret, a slidin tool carrier carrying a plurality of too s, means carried by the cam shaft for reciprocating the sliding tool carrier, a worm wheel on said shaft, a worm shaft, a worm loosely mounted thereon and in mesh with said worm wheel on the cam shaft, a pair of clutch members mounted on said worm shaft and one fastened to the worm thereof, and means for disconnecting the clutch members thereby to stop the rotation of the cam shaft on the breakage of a tool or part.` said means comprising a member in position to be operated on the indexing of the turret.

32. In a machine of the class described,

. the combination of a rotary turret having a plurality of work carrying spindles, means forindexing the turret, a sliding tool carrier, a plurality of tools carried thereby, means for reciprocating the tool carrier, tapping mechanism carried 'by said tool carrier and having a movement independently thereof and comprising a curved ended tap, and swinging means for supporting the curved end of saidtap thereby to prevent the cramping of the tapped blanks as they pass along the tap.

33. In' a machine of the class described, the combination of a rotary turret having a plurality of work carrying spindles, means for indexing the turret, a `sliding tool carrier, a plurality of tools carried thereby,

means 'for reciprocating said tool carrier,

the combination of a rotary turret having a plurality of work carrying spindles, means for indexing the turret, a sliding tool carrier carrying a plurality of tools, means for reciprocating the tool carrier, tapping mechanism comprising a curved ended tap supported in position to successively work upon blanks .carried by the work carrying spindles, and movable means for supporting the curved end of the tap thereby to prevent the cramping of the. tapped blanks as they pass along the tap.

35. In a machine of the class described, the combination of a rotary turret having a plurality of work carrying spindles, means for indexing the turret, a sliding tool carrier carrying a plurality of tools, means for reciprocating the tool carrier, tapping mechanismcomprising a curved ended tap supported in position to successively work upon blanks carried by the Work carrying spindles, vmovable means for supporting the curved end of the-tap thereby to prevent the cramping of the tapped blanks as they pass.

along the tap, and means for advancing the tap independently of the tool carrierf r36. In a machine of the class described, the combination of a rotary turret having aplurality of workcarrying spindles, means for indexing the turret, a sliding tool carrier cari-ying a plurality of tools, means for reciprocating the tool-carrier, tapping mechanism comprising a curved ended tap supported in position to successively work upon blanks carried by the Work carrying spindles, movable means for supporting the curved -end of the tap thereby to prevent the cramping of the tapped blanks as they pass along the tap, and means for advancing the tap independently of the tool carrier, said tap being supported by and having a forward and backward movementwith the tool carrier.

37. In a machine of the class described, the combination of blank supporting means and tap supporting means, a curved ended tap, swinging means for supporting the curved end of said tap thereby to prevent the cramping of the tapped blanks as they pass along the tap, means for operating one of said means toward and from the other, and means for imparting relative rotation between the blank and tap.

In a machine of the class described, the combination of blank supporting means and tap supporting means, a curved ended tap, swinging means for supportingI the eurved end ot said tap thereby to prevent the cramping of the tapped blanks as they pass along the tap, means for operating` the tap toward and romthe blank, and means for imparting relative rotation between the blank and tap.

of the class described, the combination of a bed, blank supporting means carried thereby, tap supporting means carried thereby, a curved ended tap carried by said tap supporting means, movable means for supporting the curved end ot the tap thereby to prevent the cramping of the tapped blanks as they pass along the tap, and means for imparting relative rotation between the blank and tap.

4,0. ln a machine of the class described, the combinatior of a bed, blank supporting means carrie( thereby, tap supporting means carried thereby, a curved ended tap carried by said tap supporting means, movable means for supporting the curved end ot' the tap thereby to prevent the cramping of the tapped blanks as they pass along the tap, means for advancing the tap to the work, and means for imparting relative rotation between the blank and tap.

Hlll. ln a machine ot the class described, the combination with a bed, of blank supporting means carried thereby, tap supporting means carried thereby and having a bore for the passage of the blanks. a curved ended tap carried at one part by the blanks passing through the. bore of said tap supporting means, movable means for support ing the curved end of the tap thereby to preventI the crampimgT of the blanks as they pass along the tap, means for shifting one of said snppizrtiogzf means to etlect the tapping olf the bank. and means tor imparting rel attive rotation to the biank and tap. i

ln a machine ot the ci described. the combi ation of blank supporting means, tap supporting means, a curved ended tap carried thereby, swinging means for supporting the curved end et said tap thereby to prevent the crampingy oi' the tapped blanks as they pass along the tap, means tor impartingr to the tap a movement inflepentt 39. In a machine ent of a part of its supporting means, and means for imparting relative rotation between the blank and tan.

3. ln a machine ot the class described, the combination with a bed, of blank sup porting means carried thereby, tap support.- ing means carried thereby and comprising a compound slide consisting of a pair of slides, a curved ended tap carried by said compound slide, movable means for supporting the curved end of the tap thereby to prevent the crainping of the blanks as they pass along the tap. means for shitting the compound slide. and thereby the tap, means or advancing one slide of said compound slide and the tap carried thereby independently of the other slide of such compound slide, and means for imparting relative rotation between the blank and tap.

44. ln a machine of the class described, the f :ombination with a bed, ot blank supporting' means carried thereby, tap supporting means carried thereby and having a bore for the passage of the blanks, a curved ended tap carried at one part by the blanks passing through the bore ot' said tap supportinglr means, movable, means also having a bore for the passage ot the blanks for supportingthe curved end ot the tap thereby to prevent the cramping of the blanks as they pass along the tap, means for shitting one of said supporting means to effect the tapping of a blank, and means for imparting relative rotation between the blank and tap.

45. ln a machine. ol the cl. described, the combination with a bed. ot a blank supporting member carried theizeon, t; tap supporting member carried thereon, a curved ended tap carried by said tap supporting; member, movable means for suplliorting the curved end ot' vsaid tap thereby lo prevent the cramping of the tapped blanks as they pass along` the lap. means tor moving one of said members toward and from the other, and means tor imparting relative rotation between theI blank and tap.

Signed at (,`le-.'eland, Ohio. of June, lQll.

this Elst day OSCAR A. SMITH.