US1146374A - Automatic lathe. - Google Patents

Description

A, C. VEITH. AUTOMATIC LATHE.

APPLICATION r1150 SEPT. 21. 1912.

- 1,146,374. Patented July 13, 1915.

6 SHEETSSHEET I.

4 W Wax 11%, d4. 7%?? 1 KO I 1 A. C. VEITH.

AUTOMATIC LATHE.

APPLICATION FILED SEPT.

Patented July 13, 1915.

6 SHEETS-SHEET Z.

n v E Eg Filii e i A. C. VEITH.

AUTOMATIC LATHE.

APPLICATION FILED SEP'LZI, 1912.

i mfifim. Patentedluly 13, 1915.

6SHEETSSHEET 3- it. C. VEBTH.

AUTOMATIC LATHE.

APPLICATXQH min SEPT.2h 1912.

"Patented July 13, 1915.

e SHEETS-SHEET 4.

naalunubikuuunnu A. C. VEITH.

AUTOMATIC LATHE. APPLICATION man SEPTQZI, 1912.

1,146,374, Patented July 13, 1915.

6 SHEETS-SHEET 5- '1 A. c. E lTH. AUTOMATIC LATHE.

APPLICATION HLE'D SEPT-21,19. I

Patented July 13, 1915.

. 6 SHEETS-SHEET 6.

Drag/am UNITEDSTATES*PATENTOFFICE.

ALFRED C. VIEITH, OF PONTIAC, MICHIGAN, ASSIGNOR TO GRANT AUTOMATIC MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AUTOMATIC LATHE.

T all ii /10m it may concern Be it known that I, Aprnnn C. VEITI-I, a resident of Pontiac, county of Oakland, and State of Michigan, have invented a new and useful Improvement in Automatic Lathes, of which thefollowing is a specification, the principle of the invention being herein explained and the best mode in which Ihave contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to automatic latches, its object being to provide such a lathe which will be economical in its construction and eflicient in its operation.

A specific object of the invention is to provide an automatic lathe which will economically produce what are known as castle or castellated nuts.

My said invention consists of means hereinafter fully described and particularly set forth in the claims. g

-The annexed drawings andthe following description set forth in detail certain means embodying my invention, the disclosed means however constituting but 'one of va i'ious mechanical forms in whi'ch the principle of my invention may be employed.

In the said annexed drawings, which illustrate my invention as embodiedin a machine especially adapted to the manufacture of castle-nuts: Figure 1 represents a longitudinal vertical and axial section of such an automatic lathe. Fig. 1 represents a perspective view of a section of bar-stock or blank-bar used in the device. Fig. v1 represent-s a perspective view, 011 an enlarged scale, of the puslrbar, of the blank-bar feeding device. Fig. 2 represents a plan of said lathe. Fig. 3 represents a'horizontal section taken upon the plane indicated by line III III in Fig. =1 which latter figure represents a vertical transverse section taken upon the plane indicated by line IV. I IV in Fig. 2. F ig. 5 represents a fragmentary vertical section taken upon the plane indicated by line \-V in Fig. Fig. 6 represents a fragmentary vertical section taken upon the plane indicated by line'VI-VI in 2.

Fig. 7 represents a fragmentary vertical section taken upon the plane indicated by line VIIV1I in Fig. 8, which latter represents a vertical transverse section taken upon the plane indicated by line VIII VIII in Fig. Fig. 9 represents a fragmentary plan,

upon an cnlarged scale, showing parts m Specification of Letters Patent.

are keyed two driving pulleys 5,

ateuted July 13, 1915.

Application filed September 21, 1912. Serial No. 721,637.

horizontal section. Fig. 10 represents a detail section, upon the scale of Fig. 9, of one of theblank gripping devices. F ig. 11 represents an enlarged detail fragmentary end view of the cutting-off device. Fig. 12 represents an enlarged detail vertical section taken upon the plane indicated by line XII-XII in Fig. 9. Fig. 13 represents a perspective view of a detail part of the cutting-off device.

In the form of my invention illustrated by the drawings, a main frame 1 is provided,

supported upon suitable legs 2, upon which are mounted the various parts of tlie'mechanism, hereinafter described.

Mounted in suitable bearings 3, 3, Figs. 2and' 7 ,is a main driving shaft 4.- upon which Upon this shaft is secured a sprocket-wheel 6 over which passes a sprocket-chain 7 which drives asecond sprocket-wheel '8 fixed to a secondary di'ivingsl1aft 9 mounted on suitable bearings 10, 10, on the frame. A suitable housing 11' isprovlded for incasing said sprocket-wheels and cham. as clearly shown in Figs. and 7.

At the inner end of shaft 4: is secured a. pinion 12, F ig. 2, meshing with an idle pim ion 13 which drives a gear 1% which is keyed to a rotatable sleeve 15, Fig. 1. This sleeve is ll'lOUIltt-Bd upon a hollow journalmember 16 which is fixedly secured in a box 17. The pinions 12, 13, and gear 14- are suitably incased in a housing 18, Fig. 2.

The inner end of sleeve 15 is formed with an enlarged portionulfl through which the bore of sleeve 15 projects, and which is incased in a housing,20, Figs. 1 and 9. The inner end of journal-member 16 projects into the portion 19 as shown in said figures, and has the end of its bore formed with an outwardly diverging conical surface. The remainder of suchborc is occupied by a collet sleeve 21. which is movable therein longitudinally but rotativcly fixed by means of asuitable key and key-way, (not shown) as will be understood. The inner end of colletsleeve 21 is formed with an outwardly-diverging frusto-eonical portion'or collet 22 105 ble of expansion after contraction as a. re-- sult of its own elasticity. It will hence be seen that an endwise movement of sleeve 21 releasing of a bar -of stock or blank-bar' when the. latter is lying in the sleeve with its end 'proJecting from the inner end thereof, in a manner heretofore well known to those skilled in the art. For the purpose of effecting such endwise movement, the

collet sleeve is formed at its outer end with' acollar 22 which is en a ed b two fin ers j 23, 23, Fig. l,-actuated by a hollow cone 24 movable in the direction of the sleeves axis and mounted upon member 16. This cone is engaged by a sliding member 25, formedwith a rack 26 upon its lower sur- 5 face, engaged by a segment 27 formed onone arm of an oscillatory lever 28 whose other arm carries an anti-friction roller 29 traveling in a cam-groove 30 formed upon a cam-drum 31. This drum is fixed upon a l30 shaft 32 mounted in suitable bearings 33, i 38, formed on the frame and has fixed to itsouter-end a worm\\-'heel 3i driven by a worm a.) which is fixed to a transverse shaft 36 suitably mounted in the frame. This l35 shaft 36 has secured to it a spiral gear 37 which is driven by a spiral pinion 38 mounted upon the end of the secondary driving-shaft J, Fig. 7.

-For the purpose of 'reauily dismounting 10 the parts, 1 provide a transverse groove 39 communicating with the cam-groove 30 and intersecting the-one face of the drum, so that by turning the drum until roller 29 is opposite groove 39, the lever 28 may be 5 swung so as to cause said roller to discharge the drum. This disengaging movement is effected by means of a lever 40 mounted upon thejframe, Fig. 2. and engagingthe sliding member 25 For feeding the hollow hexagonal blankv ar through the collet-sleeve, -I provide a teedinp or push-bar 41, Fig. 1", of hexagonal cross-section, snugly fitting the hexagonal bore of thesaid sleeve and freely slidng therein. The inner end of this bar is split so as to be contractible and is formed with a reduced portion having its ex-' .tremity slightly chamfercd and of a di- .meter such that with slight contraction, such portion may be caused to enter the bore )f the blank-bar and thereby be detachabl y secured to the latter The outer end of the puslrbar is formed with a collar 43 which detachably engages a. sliding carriage 44,- Fig. 1, which travels in an extended slide-way 45. This carriage hasattachcd toit one end of a cord 4L6 which travels over pulleys 47, i7, and has its other end attached to the frame 1. In a bight of this cord is a pulley -18 to which is attached 'a suitable weight 49. This weight, therefore, tends to fall and to push the carriage 4.4 toward the collet-sleeve, move the push-bar through the latter and likewise push a blankbar attached to the end of such bar. In order to render, when desired, the weight 49 inoperative, a latch '50 is mounted upon the carriage which may be manually caused to .engage the end 0. the slide-way and thus hold the said carriage in a stationary position. To facili- ;ate the movement of said carriage to the 2nd of the slide-way in the last described operation. a handle' 52 is provided, a. shown.

The mechanism thus far described constitutes the feeding- :ch; iism of the lathe .and operates as 'f'uil0\\5l Assuming no blank-barto be in the feeding device, the carriage 44: is pulled back and rendered in operative as above described and the pushbar 41 withdrawn from the collet-sleeve. The blank-bar, having been j' reviously cut to a suitable length, is now laid inthe slideway and pushed into and entirely through the collet sleeve 21 until it strikes a stop (hereinafter described) which permits the required portion'of the bar to project from the sleeve 15 for the cutting-off operation. The push-bar is now laid in the slide-way and its inner end caused to engage, as previously described, the outer end of the blank-ba'r. The carriage 4-1: is then released and the outer end of the push-bar caused to cngagesame. lhemachine now being operated. the cam drum 31 periodically effects. through the medium of the described parts, the alternate clan'iping and release of the blank-bar. During the periods of clamping, the cutting-off operation takes place as will he hereinafter described, and during the subsequent periods of release, the carriage and attached push-bar, moves the blank-bar inwardly against the stop, so as to place such bar in readiness for .the next cutting-off operation. By providing a p11sli-bai' 1')assing through the collet it will be seen that the entire blank-bar may be used up with the exception of a small end portion thereof, the length of said pushbar being such as to push the blank-bar a distance such as to reduce this remaining end portion to a minimum, as will be'understood by those skilled in thei'art. lVher such point in the operation has been reached, the push-bar and attached stub of the blank-bar may then be withdrawn from the collet-sleeve and such stub-end thereby readily removed.

For cutting-off the blanks fromthe' blilILK- inseam bar and partially forming the completed nut, I provide the following means: The inner face of the enlarged portion 19 of sleeve 15, Figs. 9 and 11, is provided. with two radial under cut grooves 53, 58 in which are slidably mounted carriers 5%, 54. These carriers have detachably secured thereto, the cutters 55, 55, which are circular in form and which may be adjusted about their axes. For such adjusting purposes, the adjacent faces of the carriers and cutters are radially serrated and secured to each other by means of centrally located screws 56, 56, Fig. 13. By these means the cutting edge 57 may, after wearing, be ground to assume a radial position, which, as will be understood, is to be desired. The back of each carrier is formed with a groove 58 engaged by one arm of a lever 59 pivoted on portion 19, the other arms of which are engaged by inclined surfaces 60 formed upon a reciprocable member 61 slidably mounted but ro tatively fixed on sleeve 15. This member 61 is provided with a groove 62 engaged by a yoke 63 fixed to one end of a lever pivoted upon the frame 1, and having its other arm engaged by a canrgroove 65 formed upon a cam-drum 6G fixed to the previously mentioned shaft 32. This cam-drum, therefore, reciprocates the member 61, during one stroke of which reciprocation the cutters travel inwardly a distance siulicieut to cut off the blank nut. The cutting edges 57 are preferably formed so that in addition to cutting off the blank, the latter will have its end reduced or chamfcr'ed to assume the form customarily given to the outer ends of castle-nuts.

The main frameis formed with a hori- Zontal annular bearing surface 67, Figs. 1 and 4, upon which is seated a secondary turret 68 of general annular construction and whose upper horizontal surface torms an annular bearing for an annular primary turret 69, said two turrets having coinciding axes at right angles to the axis or" the feed iug-mcchanism or at right angles to the direction of feed of the blank-bar. Said pri -mary turret is provided with a downwardly extendinghollow sleeve 70 through-which extends an upright hollow portion 71 of'the main-frame preferablyformed-with a circular disk 72 closing the circular central opening of the primary turret. The top of the frame-portion 71 carries a horizontal fixed hearing or friction plate 72, Fig. 9, in which is secured a horizontal cam 73 to whose upper surface is secured a second hearing or friction-plate 74. The said plates form a groove adjacent to the periphery of cam '73 as shown in Figs. 1 and l.

The primary or main turret 69 carries six emu-distant clamping or nut-holding de vices 75, each identical in construction and operation with the others and similarly placed with reference to the center of a hori- Zontal circle having its center lying in the turrets axis. Each such device comprises a main cylindrical member or sleeve 76 having its axis horizontal and intersecting the turrets axis, rotatably mounted in bearing 77 fixed to or forming part of the main turret structure. This sleeve 76 ms slidably mounted in its bore a collet-sleeve 7 8 similar to collet-sleeve 21, whose frusto-conical split end engages a similarly formed interior surface 79 of member T6 as shown in Fig. 9. The outer end of sleeve 78 is formed with a hexagonal seat 78 in horizontal alinement with the blank-bar when the latter is seated in the feeding device and has its sides in exactly the same planes respectively with the sides of such bar when so seated. This relation of the said seat and blank-bar is obtained by the use of spring-actuated ball 80, Fig. 10, adapted to engage notches 81 formed in the periphery of'the member 7 6 and distant from each other exactly sixty degrees. The horizontal aliuernent or coaxiality of said seats and 'bar is obtained through the medium of a ring 82 secured to the hollow sleeve 70 and formed with six equidistant notches 83 in its periphery' One oscillatory stroke of said shaft is im-' parted by a plunger ;88, Fig. 8, actuated by a projection 89 on cam-drum 66, Fig. 1, the

outer end of said plunger engaging an arm 7 90 secured to said shaft 87. -The other oscillatory stroke is effected by means of a suitable coil-spring 91, Fig. 4, bearing against the end of bar 84, as will be readily understood. Loosely mounted upon the sleeve 70 is an annular drivin spiral gear 92, Fi 4, which carries two Friction rings 93 of her, the upper of which engages ring 82 andis so held by means of an annular ring94 threaded upon the lower of said sleeve as shown.

Thegear 32 is in engagement with a .4 5.1 pinion 95 mounted upon the secondary drivingshaft 9. which is continuously driven in the direction indicated by the arrow in Fig. 8, when the machine is in operation. The gear 92 is therefore also continuously driven. It will hence be seen that whenever the bar 84 disengages a notch 83 the main turret is unlocked and is rotated in the direction of said arrow, as a result of the frictional engagement of gear- 92, until the said bar is again caused to engage another notch 83. The movements of the parts are so timed that such locking and unlocking takes place i once for each sixth part of a revolution of revolut 1o shaft 32 and held in such position.

6(3 and the relation of pinion 95 and gear 92 is such that one sixth of a. revolution of said turret will take place during the period in which said turret is unlocked. It will now be seen that the succeeding clamping or holding devices are inti-irniittently carried to a position. of alineinent with the blank-bar at intervals equal to the time 01 one complete ion of the cam-drum 66 and hence of A feeding operation in which the said bar is moved forward also takes place in each such period, as will he 'iuiderstoml. as well as a cuttingotl' operation. Each such. feeding; operation therefore causes the inner end. of the blanle engaged and actuated secured to said end.

5 stem of reciprorable rcau'iers hold the reamer against rotation.

Ha ge 10S)" formed on the path of revolution 30 yoke 10: engaging 0-1 mounted upon the collet-,

bar to enter the blank-seat 78 ot' the adjacent clamping device, and the inner end of such scat acts as a stop for arresting the feeding movement Oscillatorily mounted in the portion 11 of the frame is an oscillatory lever ac, Figs. 1 and *1, whose lower end is engaged on the one side by a spring-actuated plungm' 9'7 and upon the other side by a reciprocable rod 98 by a cam-face 99 formed upon acamalruni 100 also mounted upon the slnit't 32. The upper end of lever 91; engages and actuatcs a reciprocable horizontally .uiounted bar 101 which carries a a groove 103 formed in a sliding cone 1 sleeve 78. Fig. 9. This cone engages two pivoted fingers 105, 105. which are mounted upon the member 713 and lineages a collar-.1013 collct-sleeve. Itwill there fore be seen that the rotation oi druni 100 will el'l'ert the reciprocation of the colletsleeve and hence the :lteruate opening and closing of the blank-seat 78 i'ormed in its The ca1n-'l a .:e 5l l is so located that such closing operation will take place. immediately after the end oi the blank-bar is caused to enter the sea Seated in. the bore of each sleeve 78 is the 107 whose cutting head has a path oi travel intersecting the seat 78. The inner rad 01 such stem is lattened at the top and bottom so as to fit between the plates 72 and H which thus The said inner stenneud is "furthermore held in lrictional engagement with the cam 73 by means ofla coil-spring 108 hearing against a shoulde" 109 formed on said stem, and an annular the interior oi? the sle ve 78, as shown in Fig. l). The cam 73 is so located that the head of each rcanier is withdrawn from the respluztive seat '78 at the time the latter is opposite the feeding device. The exterior of each member 713 is formed wit worm-wheel teeth 110 which. are en paged by a worm 11.1 mounted upon a short vertical shaft 112, Fig. 12. The lower end of each of these shafts carries a pinion 113, of whose teeth about sleeve the turret axis is intersected by two gear segments 111, Fi 3, secured to the portion 115 of the secondary turret, the latter being formed with a groove 116 in which said pinions travel, as shown in Figs. 3 and 4. It will. therefore be seen that rotation of pinions 113 hers 76. The segments 114 are of a length such that they will each impartto said pinions a rotative movement sufficient to rotate the members 76 through exactly one sixth of a revolution. The secondary turret 68 has mounted in itthree vertical spindles 117 whose axes intersect the circumference of a circle at points sixty degrees apart. The upper end of each such spindle carries a circular saw 118, Figs. 2 and 1, and the lower end carries a. pinion 119. These pinions all engage an annular gear-wheel 120 which is mounted upon the outer cylindrical'surface of the said turret as a journal, as clearly shown in Fig. 1. Said gear-wheel meshes with a pinion 121, Fig. 6, which is mounted upon the upper end of a. spindle 122 whose lower end carries a spiral gear 123 meshing with a spiral. pinion 121 (see also Fig. 7) secured to the secondary driving shaft 9. It will thus be seen that the saws are driven continuously. These saws are so located that they intersect the path of revolution of nutdfihnks held in the gripping devices.

An os .'illatory movement is imparted to the secondary turret during the operation of the machine tiu-oughthennedium oil the ca1ndrum 100. This drum is formed with a camgroove 125 which engages a roller 126, Fig. 1 mounted upon a reciprocable bar 127 havin s, a rack 128 formed upon it, as shown in Fig. .4. This rack engages a gcar-segrment 129 secured to the downwardly projecting sleeve 130 of the secondary turret. The throw of the ('anrgi'oow is made sull'icient to cause the saws to travel entirely acrohs the face of the nut blanks held in the gripping devices. 1

As thus tar described the machine operates as follows: A blank bar having been placed in the l eeding'device as described, whereby the inner end of such bar is introduced into the gripping seat of one of the gripping devices, and the pulleys 5 being rotated, shafts 9 and 3*. are also rotated along with the cam- Chums 31, 66, and 100. The primary turret is locked by bar 81 and nien'iber 1!) is rotating at a high speed, the blanl-z-ba r being held stationary. (am face 5)!) now actuares the bar 98 to operate love. 96 to oprrate the cone 101 to cause the collet- T8 to contract and thus clamp the blank-ha r end in the gripping scat. Meanwhile cam-drum (513 is operating to move lever 61 to cause the'cutters 55 to move inwardly-to perform the cuttingbfl' operation. and (ll1Il-(ll'lllll ill to actuate, hrough the intermediate parts, as previous. described,

will effect the rotation of memthe collet-sleeve 21 to clamp the bar in the feeding device. The cutting-0E operation is thus performed with the blank bar securely held. Such operation having now been com pleted, locking bar Set is withdrawn as a result of the engagement of projection 89 with the plunger 88 and the consequent actuation of the gear segment 86. This allows the primary turret 69 to rotate sixty degrees while the nut-blank is still securely clamped in the gripping scat. At the same time, out ters are being retracted and collet-sleeve 21 loosened by the actionof cam-drum 31 so as to allow the blank-bar to be pushed inwardly to haveits end inserted in the gripping seat of the next gripping device on the primary turret, whereupon the above described operations are repeated. In the meantime, however, the nut-blank just formed has-reached a position of rest sixty degrees distant from its starting point and immediately thereupon, cam-drum actuates bar 127 to impart one oscillating stroke to the secondary turret and so cause the first saw to pass across the nuts face to form the first groove. Upon the nextpartial rotation of the prin'iary turret, the nut so cut is carried to the next saw, but during such travel, the corresponding pinion 113 engages the first sefnuent 114, and a result the member TG' together with the nutdslank is rotated through an angle of sixty degrees. While this is occurring, the inner end ofrearner 107 is eng, ged by cam 73 and the reamer thus pushed outwardly and into the end of the bore of the nut-blank. The reamer being held, as before described, against rotation, and the nut-blank rotating, a partial reaming operation will take place as the blank travels from the first to the second saw. The primary turret having traveled another sixty degrees now comes to rest and the second saw is caused to form a second groove at an angle of sixty degrees to the first-former, groove. During such time it will be observed, a third wit-blank is be ing cut oil and the first groove is also being formed in the second-formed blank. Upon the next movement of the primary turret, the gripping" device holding the first-formed nut-blank is again rotated sixty degrees, a further reaming operation is effected and a third groove formed in exactly the previously described manner, wvhile a fourth blank is being cut oil, the first groove is be ing cut in the third-formed blank, and the second groove-cutting and first reaming op eration is being performed on the. secondtormed blank.

Located so as to have its field of operation sixty degrees from the field of operation of the last saw, and 'mounted upon the main frame,.is a nuttepping device 131, Figs. '2 and G. This device may be of any suitable or Well-known construction, the details of rack 136 formed thereon.

which form no part of my present invention. As shown, however, it consists of a hollow spindle 132 carrying a chuckfor holding the tap 133. This tapping mechanism is so ar ranged thatthe spindle 132 is pushed fortap before the next turret movement takes place. To effect the forward movement of the, spindle 132, a lever 183? is mounted on the frame as shown in Fig. 6, having its upper end engaging the outer end of a rod 18% seated in said spindle, and its lower end engaged by a reciproca-ble rod 135, having a Said rack meshes with a spiral pinion 137 mounted upon a rock-shaft 138. Said shaft has securedto it a pinion 1339, Figs. 7 and 8, which is engaged by a rack-bar 140 arranged to be periodically actuated by a cam 1&1 formed in the camdrum 66. The rotation of the spindle 132 is effected through the medium of an upright spindle 142 and intermediate detail parts. Said spindle 142 is driven by a chain 143 itself driven by a sprocket-wheel 1 1 1 mounted upon the lower end of spindle 122, Fig. 6. Sixty degrees from the tapping device is an extracting and ejecting device. The latter comprises a horizontally reciprocable tube ll?) having its inner end split. as shown in Fig. 5, and adapted to slip over the end of a out while held in a gripping-device. This tube slides upon a fixed ejector-rod which passes into its bore. A lever 1&7 is mounted on the frame and has its upper end engaging the said eXtrector-tube, the lower arm of which is engaged by a spring-actuated plunger 148 tending to draw the tube outwardly. The lower end of said lever is engaged by reciprocable bar 149 formed with a rack 150 engaging a spiral gear 151. The latter is fixed to a sleeve 152 rotatably mounted upon the aforementioned rockshaft 138, Fig. 7. The outer end of said sleeve has fixed to it a pinion 153 engaged by a *ack-bar 154 which is actuated by a second cam on cam-drum 66. Each. revolution of the latter, therefore, causes the extractor 'tube to move inwardly. surround and ii I is eii'ected.

cam-groove 156, Fig. 9, which at the proper time engages a projection 157 formedon said cone, whereby such required movement This groove terminates as shown, at a point such as will allow the cone to be again moved to'eiiect a locking operation immediately after the end of the blankbar has been inserted in the seat from which a nut has just previously been removed. In this manner, it will be observed, that the blanks are cut, sawed, tapped and ejected, and that all of the tools are operated. simultaneously, thereby reducing the time for completing a nut to a minimum.

Having fully described my invention, vhat I claim and desire to secure by Letters Patent is:

1. In an automatic lathe, the combination of non-rotatable means for feeding a blankbar in the direction of its axis; a revolving cutter having its field of cutting operation adjacent to the end of said means and having its axis coinciding with the axis of the latter; and means for automatically reciprocating said cutter radially with reference to its axis.

2. In an automatic lathe, the combination of a tubular member Whose bore forms a slide-Way for a blank-bar; and having a conical, contractible end-portion; means in which said member is slidable and adapted to eflect the contraction and permit of the expansion of said end-portion; and a' rotatable cutter mounted upon said means is a journal and having a central opening egistering with said bore.

3. In an automatic lathe, the commnation of a turret; a rotatable gripping device mounted on the latter and having a radially disposed bore; a non-rotatable cutting tool slidably mounted in said bore and having a path of movement intersecting the blankseat of said gripping device; means tending to retract said tool from said seat; a stationary cam engaging the inner end or saidtool; and means for rotating said gripping device.

I 4. In an automatic lathe, the combination of a turret; a rotatable gripping device mounted thereon and having a radially disposed bore; a non-rotatable reamerslidably mounted in said bore and having a path of movement intersecting the blank-seat of the gripping device; means tending to retract said reamcr'from such seat; a stationary cam engaging the inner end of said reamer; and means for rotating said gripping device.

In an automatic lathe, the combination of a turret; a rotatable gripping device mounted thereon and having a radial bore; a non-rotatable cutting tool slidably mountedin said bore and having a path of operation intersecting the blank-seat oi the gripping device; means tending to retract said cutting tool from said seat; a stationary cam engaging the inner end of said cutting tool;

and means for intermittently and partially rotating said gripping device.

6. In an automatic lathe, the combination of a turret; a rotatable gripping device mounted thereon and having a radial bore; a non-rotatable reamer slidably mounted in said bore and having a path of operation intersecting the blank-seat of the gripping device; means tending to retract said reamer from said seat; a stationary cam engaging the inner end of said reamer; and means for intermittently and partially rotating said gripping device.

7. In an automatic lathe, the combination of a turret; means for intermittently and partially rotating same upon. its axis; a gripping device mounted radially and rotatably uponsaid turret; a plurality of cutting too'ls mounted upon a. secondary turret and so as to have a field of operation intersected by a blank held in said gripping device, during the revolution of the latter about the turrets axis; means for rotating said turret; and means for effecting movement of said secondary turret.

8. In an automatic lathe, the combination of a turret; a gripping device mounted rotatably and radially thereon; a plurality of saws mounted so as to have field of operation intersected successively by a neat held in said gripping device, during the tlevolution of the latter about the turrets axis; means for periodically and partially rotaltihg said turret; means for periodically and partially rotating said gripping device during the partial rotation of said turret.

9. In an. automatic lathe, the combination of turret; provided with a plurality of radially extending rotatable gripping devices; means for imparting to said turtret a succession of partfail-rotations of amplitude such as to bring the gripping devices successively to the same given position; three saws placed adjacent to the periphery .of said turret; in succession in the direction .of tin-ret-rotation and mounted upon a secondary turret; means for partially rotating said gripping devices after leaving the first saw and before reaching the second; means vfor similarly rotating said device after leaving the second and before reaching the third saw, and means for periodically reciprocating said secondary turret.

10. In anautomatic lathe, thecomomation of a turret; a plurality of gripping devices rotatably mounted thereon with their axes radially disposed with reference to the turrets axis and at right angles thereto; each such device having a rotating member formed with worm-wheel teeth; a Worm engaging the latter and mounted upon a spindle carrying a pinion; and stationary racks lying at interwls in the path of revolution oi said pinion.

11. In an automatic lathe, the combinaion of a main turret; a plurality of gripping devices rotatably mounted thereon with their axes radially disposed with reference to the turrets axis and at right angles thereto; a main frame in which such turret is mounted; a secondary turret on said main frame, surrounding said main turret, oscillatory on said mam frame, and having its axis coinciding with the of the said main turret; a plurality of cutting tools having the' axes parallel with the main turret axes, mounted upon said secondary turret, and having their field of operation intersected, by the path of revolution of blanks held in. such gripping devices; means for periodically and partially rotating the main turret;

means for periodically effecting a gripping and releasing operation on the part of said gripping devices; and means for actuating said cutting tools.

12. In an automatic lathe, the combination of a main turret; a plurality of gripping devices rot tably mounted thereon With their axes radially disposed with reference to the turrets axis and at right angles thereto; a main frame in which said turret is mounted; a secondary turret on said main frame surrounding said main turret, ()SClllatory on said main frame and having its HXIS colnclding with the main turrets axis;

a plurality of rotatable cutting tools having their axes parallel With the main turlets axis, mounted upon said secondary turret and'having their fields of operation inter said secondary turret during such rotation;

a. tapping device mounted upon saidmain frame and having the taps axis radially disposed with reference to the turrets axis; means for operating said tapping device periodically; an extractor for removing the finished nuts from the gripping device; and" means for periodically operating said'extractor.

Signed by me this 80th day of August,

1912. ALFRED C. VEITH.

Attested by-- v H. W. HOLMES, Ronnnr H. GRANT.

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