US1067285A - Rifling-machine. - Google Patents

Description

J. H. TORNEY.

RIFLING MACHINE.

APPLICATION FILED JULY 21, 1910.

Patnted July 15, 1913.

6 SHEETS-SHEET l.`

mw Q J. H. TORNEY.

RIFLING MACHINE.

APPLIOATION FILED JULY 21, 1910.

1,067,285. Patented July 15, 1913.

6 SHEETS-SHEET 2.

` JNI/ENTo/e 2% yf@ Wwf 'zy mamey JL H. TORNEY. RIFLING MACHINE.

APPLICATION FILED JULY 21,1910.

J. H. TORNEY.

RIFLING MACHINE.

ArrLloATmN FILED JULY 21, 1910.

1,067,285. Patent-,ed July 15, 1913.

6 SHEETS-SHEET 4 J. H. TORNEY.

RIFLING MACHINE.

APPLICATION FILED JULY 21, 1910.

Patented July 15, 1913.

B BHBETHHEBT 5.

S mm.

OQ lllfl- J. H. TORNEY.

RIFLING MACHINE.

urmouxon FILED JULY 21, 1910.

Patented July 15, 1913 6 SHEETS-SHEET 8,

l 1v1/15N TOR UNITED STATES PATENT OFFICE.

JOHN H. TORNEY, 0F WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR 0F ONE-THIRD TO HARRY WILSON AND ONE-THIRD TO JOHN C. RINEHART, 0F WASHINGTON,

DISTRICT 0F COLUMBIA.

RIFLING-MACHINE.

Specification of Letters Patent.

Patented Ju1y15,1913.

Application tiled July 2l. 1910. Serial No. 573,017.

To all whom it may conce-rn Be it known that l, JOHN ll. TORNEY, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful improvements in Riding-Machines; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to rifling machines of the class used in forming the grooves in the riding of ordnance.

The invention especially relates to what is known as the ritling head of auch a. machine.

ln rifling wherein the grooves are of uniform depth and width throughout, the portion of the band which is forced into the grooves is worn away to some extent during the passage of the projectile 4through the bore of the gun. This causes aspace to be left between the side of the, groove and the ortion of the hand projecting therein with the result that the gases produced bv' the combustion of the powder escape through the opening` left at a very high velocity. 'l`hc.int.ense friction set up by theaohgases together with the high degree of temperature causes the metal of the band to wear away more rapidly and also causes: seourin of the metal of the groom to the Pgreat injury of the gun. It has long been recognized that. this might he prevented hvtaperinfgy the, grooves so that they would have less erosiel neetional area at the muzzle than toward the hree-eh hut it has heretofore been impracticable to so taper the grooves.

The principal object of the present. in vention is to provide a mechanismadapted to riie a gun in such manner that tapering grooves ivill be formed therein, the taper being in the depth or in the depth and width combined.

In the art of rilling guns a head is ernploycd which fils the bore of the gunand carries tools which eut the yroovcs by a planing' operation. These too s have heretofore been lubricated by oil introduced against the movement of the rllling head, the latter cutting as it moves from muzzle to breech While the oil has been introduced in a stream toward the muzzle. The effect of this is to drive the Small chips formed against the riling head with the consequence that the tools become rapidly dulled by working over these chips.

A second object ofthe invention is to provide a lubricating means wherein the ubricant will be forced through the head lin the same direction as that in which the being j head is moving when cutting ie eiiected so that the chips formed will be Washed away from the head and injury to the edges of the rifling cutters due to the chips will be eliminated.

A third object of the invention is the provision of a mechanism wherein tapering grooves may be out in a p-iirtion of the length of the here, the remaining portion of such here being rified with parallel .sided grooves of uniform depth.

With the above and other objects in view, as will be hereinafter apparent, the in'ven tion consists in general of a ritling'head provided with mechanism arranged to cui; grooves tapering in depth from muzzle to breech of a gun.

'lhe invention .further consists in certain novel details of construction and combinations of arts hereinafter' fully described, ilhistratee in the accompanying drawings and speciflcaliy forth in the claims.

ln the accompanying drawings, like char acterf-i of reference indicate like parts in the several views, and -Figure l ieaaide elevation ot' a portion of a riling machine shone ing the improved mechanism in poeition thereon; Fig'. 2. an end elevation ot a portion of auch a machine provided with the im )reveil nierhaniein; Fig. 3. a, longitudinal] median section through a riding head conetrurtcd in accordance with thi.:J invention; Fig. 4, a 'face view of auch a head; lfig. 5, a section on the line ."i--- of iiig. 3; Fig. a detail view of a riding, head hody constructed in accordance with this` invenn tion; Fig. i', an end view of the body; Fig. S, a section on the-line 8-8 of Fig". fig Fig. 9, a view of the rear of the face plate: Fig. 10, a section on the line Or---lO of Fig. i); Fig. il, a section on the line 11m-ll or" Fig 9; Fi l2 and 13, detail viewg of a eertain s eeve used herewith; Fits. 14 and 1,5. detail A7iews of' a certain dial plate used herewith; Figs. 16 and. l?, detail views of tapered sh ank a portion of a locking device used herewith: and, Figs-18 and 19, details of an arin used herewith.

It is well understood in the art that a riding machine consists of a bed having suitable gun supports formed thereon, a fixed rifiing bar support through which the bar slides and rotates, a movable carriage traveling over said bed and supporting and carrying the ritiing bar` a rifling head on the bar and suitable :utuatiner means t'or said bar. In the present instance only those parts of auch a machiiu` have been shown as either foi-1n a part, of this invention or direct'lv coliiicrate therewith, and the bed is indicated at 10.

On the bed is a carriage supporting" a fixed ritling' bar bearing; through which the bar slides, the bearing being provided with guide means to engage the groove common to riliing bars. rl'his carriage and support are of the ordinary form.

At l?, is indicated the movable carriage whereto is attached the ritiing bar bearing 171. This bearingI or suppTrt lethal-ries a rifling bar 15, the bar being so secured to the support that as the support travels the bar will also more. The bar is provided with t the usual rifling grooie 1G and the support has suitable guide means. details of which l are not here shown as forming; no specitic l i'orin of the invention. This bar 15 is holll low throughout .its length and is provided l on the end adjacent the 2gjun with external i screw threads 17y l The riilinpv head consists of a cylindrical il body portion 1S on which is titted a jacket, y, 1f), the iat-het closely i 1 head and being ot a bore correspon-.litigi properly with the diameter ol" the gun to he rifled. This jarltet 1*.) is held fro-1u numnxent rearwardly on the body by means oi' a ringV 2t) which is screwed on to a reduced and threaded portion 21 formed on what is preferably termed the rear or ritiingr bar end il of tho body 1S. il a second reduced portion 22 which is cyengaging the ritliru lindrical in torni and on this reduced por tion is held the forward end of a sleeve 2?. the. bore of the sleeve being reduced forward end to tit on the body portion while the remainder of the sleeve is spaced 1 troni said body. Adiacent the reduced porl tion 2Q is a third reduced portion 24 which threaded exteriorly and between the sleeve l l at said oo if? and said threaded portion 524 is fitted a threaded ring Q5 which serves to hold the sleeve .23 so that the `latter freely rotatable on the portion 2Q while it is prevented from movement longitudinally of said body. l The body-18 terminates toward the rear in a l 26 having a keV 27 titted l therein and the rear portion of the sleeve 28 i is threaded interiorly as at 28 and provided exteriorly with a polygonal surface forming t these bolts being received This body is provided with l.

l head t8 formed on its for a nut 29 for the reception of a wrench. The ritling bar l5 is hollow interiorly as previously noted and the rear end of this bar is formed with the hollow portion of uniform diameter throughout as indicated at 30 while the forward end of the bar is pro vided with a tapered bore S1, the taper being such as to fit the tapered shank 2G and the here being,r provided with a key seat 32 for the reception of the key 27. The head is connected t0 the bar by inserting the shank 26 in the tapered bore il in such inaniner that the l-:ey 227 slips into the key seat 3Q, thus` permitting the engagement of the threads 28 on the sleeve 23 with the thread 17 on the har. The sleeve Q3 is then rotated and the shank 26 forced firmly back into the tapered bore 31 until the two parts are rigidly connected. The toi-ward end of this body 18 is provided with a series of radial slots 33 .here shown as four in number although any other number which may be found preferable can be used'. Between the adjacent slots there are provided threaded holt receiving' recesses 31. On the front of this head is a face plate 35, the face plato being secured to the head by suitable bolts 3G whieh pass through the face plate and into the threaded recesses 34, the heads of in oountersunk reresses :37 formed in the face plate 35. In the slots are held cutter holders 38. Each of these cutter holders is provided with a pocket 3). ltlxtendmg across the pocket 39 ot each of these holders is a pivot pin 40 1 and the walls of the holder pocket 39 are provided with portions 4.1 concentric with tht` pivot pin 40. These concentric walls are hinted toward the outer end of the respective pocket and held in this outer end is the body Yt? ot' a blade carrier which tits this outer end ot the pocket $39 and is provided with arcuate surfaces fitting the surfaces 4t. This body Vti pivoted on the pin 40 so that it is freely rotatable thereon. Extending' into the inn u' end ot'- the recess is a stern 43 which is formed on the body 42. Each of these cutter ladders 38 is provided with an opening ll extending' through the rear wall and connnunieating with the pocket 39, the rear end of this opening being threaded for the reception of a screw plug etz'i. wall ot each of said `cutter holders is also provided with an opening* indicated at 46, the openinfafy being,Y threaded and alined with the opening' 44. 'l'hroueh this opening;y 46 extends a threaded pin 117 havintr a square 'ard end for the reception of a suitable wrench. Between the portion 4?) and the plugr 45 is a spiral spring 4S which normally forces said portion Yt3 Jforward againstihe respective pin 47. By this means the blade carrier is permitted to move in one direction about its pivot by the compressii of its spring 48 The front mames whileits' `Iiiovement in the opposite direction is nreventedby its pin 47.\ Each of these 4 blade carriers is providedwith a pocket or seat 49 wherein is heide cutting blade 50,

the blade being secured in position by a suitable screw 51.

The parts just described am so arranged that by the proper adjustment of the pins 47 the cutter blades 50 will (bite into and cut the springs 48 will compressand relieve thev pressure on the edges ,of the respective cutting tools. For the purpose of adjusting the .l pins 47 thesepins roject forward through slots 52 formed in t e face plate 35.

The body 18 of the' head is rovidcd with a centrally disposed longitu inal opening 53 which extends from oneend to the o L er of said head and communicates with 'the -bore or opening extendin through the riding bar. .In'the forward en of the opening 53 there is mounted a sleeve 54 the forward end of which projects into the space formed by the intersection lof the slots 33. This 'sleeve is rovided at the forward end with tapered ove-tailed portions 55 which cooperate with dovetailed portions 56 formed on the members 138, the portions 56 Vbeing likewise tapered to conform to the taper of the portions 55. The taper of these portionsis such that if the sleeve 54 bemoved forwardly in the head 18 the members 38 will be moved radially outward in theirk respective slots while if the sleeve 54 be moved rearwardly said members will be drawn inward in these slots. For the purpose of moving the sleeve in this manner two arrangements are provided, one a manual adjustment and the other the automatic means by which the sleeve is moved forwardas the riling head is'carried forward by the riiling bar.,

vThere will first be considered the means by which the cutters are caused to move outwardl from the axis of the riding head during e movement of the bar from the muzzle to the breech of the gun and inwardly when the movement is reversed. vAs previously noted both the rifling head and the riding bar are hollow throughout their lengths'. Through the riding head extends a. 'rod 57 having at one end a head 58 pro- `vided .with a socket 59 polygonal in cross section. .Through the riding bar extends a rod 60 having a polygonal end 61 of such size as to fit thesocket. 59 when the parts are assembled. This rod 60 projects beyond the riding bar and is provided near its rear end with a collar 62 which contacts with vthe arts are in position, the bar being fitted Vw1th a suitable washer 63 to permit a close contact to be made. Located on the carriage 13 isa from rotation.

standard G4, the standard being preferably toward the rear of the carriage. The carringe is provided with a T-slot 65 and the standard 64 is secured to the carriage by means of Tbolts 66, 'the latter passing throu h the basesof the standard and being provi ed with nuts 67 b means of which the standard may be fixe in position on the carriage or, if the nuts be loosened, may be allowed to slide along said carriage. This standard is provided with a head 68 having a lateral slot 69` formed therein, the slot. prefere-bl being in the. same horizontal plane with the axis of the riding bar. Upon the rear end of the rod 60 is secured an arm 70 provided with a split clamp 71 the rvparts of which are drawn together by a suitable bolt 72 after the clamp has been placed upon the rod 60. The end of this arm 70 opposite the clamp is provided with a head 73 'adapted to fit in the slot- 69. It will thus be observed that When the arm is `properly clamped on the rod and the head 73 held in the slot 69'the rod will be prevented Upon the forward end of the rod 57 is a threaded sleeve 74 whichis held within the sleeve 54, the'latter being provided with suitable threads to engage the threads on said sleeve 74. This sleeve is normally kept in engagement or locked to the rod 57 by means hereinafter to be described. Now, inthe operation of this feature of the invention, as the rifling bar is moved forward it carries the rifling head with it and by reason of the guide in the front supportthe'. riding 'bar is rotated to give the proper twist to the rifling. Meanwhile the rod 57 is held from rotation by its connection with the rod (S0, the latter being held from rotation by the arm 70. Now, if the sleeve 74 be locked to the rod 57 the sleeve 54 will rotate on the sleeve 74 with the result that the sleeve 54 will be advancedby the action of the threads on said sleeves in direction toward the front of the riding head. By means of the beveled surfaces on the sleeve 54 and the members 38 the latter will move radially outward l and will carry the cutter blades 50 with dthem thus causing said blades tocut a deeper groove the farther the riding head is advanced.

.In order to prevent longitudinal move-4 ment of the sleeve 7 4 on the rod 57 the face plate 35. is provided lwith a centrally disposed threaded opening wherein is held a threaded )lug 75. This plug 75 is also provided wit a central opening wherethrough passes a cylindrical portion of the sleeve 74, and the forward end of the opening in .said plug is recessed for the reception of' a collar 76 formed on said sleeve 74 and still further recessed to a greatendiameter than the collar' receiving recess for thc reception of a plate 77 which is held by suitable screws tudinal movement with respect to the head 18. The sleeve 74 is continued forwardly through the plate 77 and has -fixed thereon 'rear entleieduced as at 85 nndprovided a nut 79. This nut carries a. dial plate 78 provided with suitable graduations and havipg the graduated portion brought to a knife.. edge bearing against the plug 75, the latter being provided with Ian index adapted to indicate the starting point from which the measurements taken by said graduations are made. In 'front of the nut 79 is a second plate S0 preferably formed integral with the nut. The rod 57 extends through this see'- ond plate 80 and'on the. end of this rod is fixed a. dial plate 81 carrying a boss 82 wherethrough passes a spring pressed plunger S3 provided with a knurled head The plate 8O is provided with a series of recesses S5 arranged concentrically to the center of said plate and at the saine dis- -tance from said center as the center of the plunger S3, the latter being thus adapted to tit within any one of said recesses` S5. New so long as the plunger is engagedl in one of the recesses the sleeve 7st and rod 57 will be locked together so that one cannot rotate without the rotation of the other. "hen itV is desired to move the sleeve 5t fora-'lard as when in setting the depth of the vcut te be taken, the knui'led head 84 is grasped and the plunger 83 withdrawn frpm therespeetive reces-s S5 in whiehit may be, engaged. A wrench is then applied to/th'e nut 79 and the latter is rotated.- This will canse the rotationV of the sleeve 74l and vaetuate the sleeve 54 to move the cutters .outward in the manner previously described. Y

Considering now the manner in which the oiling is accomplished.

with suitable4 pipe threads for the reception of an oil pipe leadi 0f from the'usual oil pump Comme-n to rifling machines. Furthermere` the rear Aelild of this. rod 60 is vrecessed as at 86 to provide an oil passage and the for ward end of this recess extends,V forwardly Yof the collar 62 and is there provided with ports 87 which open into the; space between said rod and the bore of the ritling' bar.

As previously noted this bore is continuous with AVthe bore 53 in the ritliiig head. The riflintr headis provided intermediate itsends with a plurality of ports SS which lead radially outwardly through the head te transverse oil 'grooves 89 formed eircumterentially of the surface. of said bod v and coumiunica-ting each wit-h a. series of forwardly extending longitudinal oil grooves 9() whielrterminatt: between theslots Iii', in ports 91. liy reason ol' the fact. that the jacket t9 is a close tit on the body it. covers tlwgrooves both transverse and longitudinal and thereby makes The rod (30 hasI its passages for the oil and directs the same to the ports 91. The ports 91 are arranged to communicate with the inlet ends of ports 92 formed through the 5face .plate and so'disposed that the stream ,of oil issuing from them flow directly in fi'nt of' the cutters and with otherports 93'also foi-inediti'` said face plate and lying in radial planes but forwardly and 'outwardly directed, the latter ports being for the purpose of =lubricat-A ing the lands ofthe rifling during the passage of the. head tliiongli-.tlie bore of the un l For the purpose of preventing the oil in the bore 53 of the head from passing' into the forward end of said bore and coming in contactI with the sleeve 74, thus injuring the threads through the minute chips carried therein cutting said threads, the bore 53 iS provided with a suitable` stopper or plug. In the presentl instance there is used to oiin the rod 57 and. forward of this collar is a. second collar 95"against which rests packing 9G held in position by a-follower plate 97, the latter being forced tirmly against the packing by a spring J8 interposed between the collar 9:4 and said follower plate.

From the foregoing it will be plain that oil introduced through the rear end of the rod G0 will flow forwardly between said rod and the wall of the bore 30 intothe bore 553` of the head. Thencethe oil will pass through the openings SS into the grooves 89 freni where it will [low forwardly through the grooves 90, ports 91, and ports 92 and 93 in front of the cutters and the ritling heath.

the streams of oil ,being all directed away from the' face of the .rifling head so that they carry the chips eut away from said head and prevent injury to the cutters bysaid chips` In order to arrange for cutting a. portion of the groove of uniform depth throughout it. is merely necessary to release the arm 70 from the slot 69 when the arni will rotate with the rifling bar andthe sleeve 54 thus.

remain stationary with relation to the rifiing head. To this end a knock-off arm' 99 is provided which is adjust-able along the bed of lthe ritiing machine andthe arm isdarranged to .project inwardly in the path of the standard et. illhen it is desired to change this method of ventt-ing the grooves the nuts 67 are loosened and the arm 99 placed in the desired position. Now as the carriage. advances tlirongli lthe first portion of the cut the rod ('O with the parts connected thereto will be held from rotation and the cutters will be moved gradually outward 'as the rifling bar progresse-s from the -iniiz- '/.le toward the breech. til reaches the point at. which it engages with the arui 99 the carriage 13 willcontinue to move forward het the Standardt will be stopped. As the. carriage 13 moves When the standard this vstopper a collar 9l which is fixed upon Leonesa fmwiard it carries with it the arm which thus becomes disengaged from the groove (it) and the anni is thus permitted to rotate as previously described with the ellect of stopping ythe movement of the sleeve 54 toward the face plate. .it will thus` be seen that the device may be set for either cutting: grooves which taper throughout the entire length or for vatting grooves which taper a portion oi' the iength and are of uniform depth throughout the remainder` or. by removing the arm T0 may be used tor cutting grooves of uniform depth throughout their entire lengt-h.

1n the operation of the tie-:ue the cutters are moved out by hand by releasing the plunger 83 and using a wrench on the nut 79 in the manner previously described until they have been set to out the required depth of groove. The machine is then started and the cutters will engage the metal of the gun and out the same away to form the groove, the cutters moving farther out as the head advances provided it he desired to cut a tapering groove and the machine he ar ranged therefor in the manner previously deocribed. iVhen the riding; head has reached the forward iimit of its movement the riding; machine is reversed and the head drawn back through the bore. The springs its" will relieve the pressure on the entiers and at the same time the sleeve 54 will be drawn back and pull the carriers 8S inward, thus preventing jannniug of the cutters` in the hallovv portions ot the groove. The riding bar having reached the rearward limit of ite stroke adjustment is again. made for a sew ond depth ot out and the operation repeated. these outs and adjustments beingr alternately mudo until the grooves are completed.

It to be understot'id that the pitch of the screw and rraduations of the dial plate may he rcadilv arrangeil so that each gradu ation indicates a detinite traction otan inch or other measurement, thu@l greatly zu sist'ing in the setting ot the ruiters and it is also to be observed that the number ot' reces. es.: S5 and their spaeings maiv also be arranged to assist this setting.

It will be obvious that the cutters may be drawn iii-aard at any time. even it the head be in the here of a gun, by releasing the arm from the standard and rotating' the rod GO in the proper direotion h v using the arm a lever for this purpose. lt will also be obvious that. any change in thc taper ot the dove- tails 55 and 56 or in the pltoh of the screaY connecting the members .'34 and T4 will alter the rate ot outward feed of the cutters so that by propertyY prtuiorlinning` these parts any desired elianges oi' feed ma); he obtained.

There has` thus been provided a simple and ,efficient device of the kind described and for the purpose specified.

It is obvious that minor changes may be made in the. form and construction of this invention without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all such as properly come Within the scope vt the appended claims.

Having thus described the invention. what is claimed as new, is:

l. 1n a riding' n'iachinc, a rotatable riding head provided with laterally opening slots, a cutter carrier movably mounted in eaoh of said slots. said Cutter carriers each having its inner face at an angle to the axis of said head. a sleeve having inclined outer fares engaging the inner faces ot said carriers. said sleeve being provided with a threaded bore, a threaded member engaged in the threaded bore, means to prevent the rotation of said member, and a release mechanism for said means operable upon completion ot' a predetermined movement, of said head.

2. 7in a ritling machine, a rotatable riding;r head provided with laterally opening slots, a ruiter carrier movablv mounted in eaoh of Isaid slots, said cutter carriers each having' its inner faire at an angle to tht` axis of said head. a sleeve having inclined Outer tat-cs engaging' Vthe inclined faces of said carriers, said sleeve being provided with a threaded bore, a second sleeve threaded to lity ysaid bore. a rod runningr through said second sleeve, a releasablelockingdeviocconneming said second sleeve and rod7 and means to prevent the rotation of said rod.

il. in a ri'liug machine, a rotatable rilling head provided -with laterally opening slots. a cutter carrier movabl)y mounted in each olL said slots. said cutterrarriers nach having iti,I inner tare al, an anglo to thc axis of Said head. a sleeve havin;r inclined outer faces engaging the inclined fares of said tmrriers. said sleevc being: prmided with athreaded bore. a second sleeve threaded to tit said bore. a :od running through said second sleeve. a releasahle ita-king device c0nnccting SaidA second sleeve and rod, means to prevent the rotation of said rod. and a release mechanism for said means operable upon completion of a predetermined movementi o said head.

4. ln a riding machine, a rilling har, a carriage supporting oneend of said ritlintlr bar. a riding! head on the opposite end of said bar. cutters carried by said head and movable tovard and from the axis of said bar. an operating mechanism connected toi said cutters to move the cutters relative to' said axis and includingv an actuating ele ment, said operatingr mechanism beingI actuated b v the relative rotation ot` the head and actuatiingr element, a rod extendin through said Ariding bar, releasable locking meaus to imuunablv connect said rod and aetuating element. and enacting engaging means on said rod and carriage to prevent the rotation of said rod.

ln a 'ritiing machine, a rifling bar, a earrianfe supporting: one end of said riiing har. a ritling' head on the opposite end of said bar, cutters carried b v said head and movable tovvard and from the axis of Said bar. au operatingT mechanism connected to said ruiters to move the cutters relative to said axis and inehidingr an aetuatingy element. said operating merhanism being a0- tuated h v the relativ(` rotation ot' the head and aetuatiurr element. a rod extending through aid 1'. lin bar`r releasable loekingir means to in'unovably eonueet said rod and aetuatin;Y element, eoaeting engaging means on said rod and Carriage to prevent, the rotation of said rod, and a release mechanism tor said eoaeting' engaging means operable on Completion of a predetermined movement. (if Said ha?.

(l. ln a ritling;r marhine, a ritiing bar, a rari-lage supporting one end of Said riflin bar. a rifling head on the opposite end o' said bar, Cutters4 Carried by said head and movable tovvard and from the axis of said bar, an operating: meehanism connected to said Cutters to move the Cutters relative to said axis and including an actuating element, said operating mechanism being aetuated by the relative rotation of the head and aetuatingelementl` a rod extending through said ritiing bar7 releasable locking means to ilnlnovahly Connect said rod and actuating element, an arm tixed on said rod, and a standard on said Carriage provided with a slot to receive the end. of said arm and hold the same from movement.

7. ln a rifling marhine` a riding bar, a carriage supporting one end of said ritling bar. a ri'tiing head on the opposite end of said liar, rutters carried by said head and movable toward and from the axis of said bar`r an operating' mechanism Connected to raid cutters to move the cutters relative to said axis and ineludingy an actuating element, said operating; mechanism being aetuated by the relative rotation of the head and actuating element, a rod extending through said ritling' bar, releasable looking means,` to immo 'ably connect said rod and actuating element, an arm lixed on said rod,

a standard movable on said carriage, and provided with a slot to receive the end of said arm and hold the same from movement, -and a stop .member fixed in the path of said standard to move the standard outy of engagement with the arm.

8. In a ritliug marhine, a rifling head, and cutters carried b v said head, said head being provided with a chamber formed therein and further having lubrirant duets leading from said Chamber and provided with mouths arranged to direct the luhfieant in advanoe of and in the paths of said cutters, said head also having other duets leading ltrom said chamber and provided with mouths arranged to dirert the lubricant outvvardly in advanee of said head and between the pathsof Said cutters. l

9. ln a riding machine, a ritling head. and Cutters carried by said head` sa id head being provided with a chamber formed therein and further having lubricant ducts leadinfY from said chamber and provided with mouths arranged to direct the lubricant in advance el and in the paths of said cutters, said head also having other duets leading from said chamber and provided with mouths arranged to direct the lubricant out- Wardly in advance of Said head and between the paths of said Cutters; in combination with a ritiing bar having a bore extendin therethrough and communicating with sai by sa id bar,

chamber formed therein and provided with lateral openings leadin f from said rhaxnbr to the outs'de of the )ody and located in spaced rela 'on to the. front;y end of the body, said body heilig further provided with peripheral grooves in which said openings terminate and with longitudinal grooves eX- -tending forwardly from said peripheral grooves, a jacket surrounding said easing and covering said rooves, and a tare plate on the front of sai( bod)v and having ports extending through the piate and communicating with said groovrs.

ln testimony whereofA l atfix mv sigma ture, in the presem'e oi' tvvo Witnesses.

JOHN ll. TORNEY.

vitnesses llenar T. Bnnnrr, J. M. Bit-unir.

Chamber, and an oil pipe connection Carriedv 10. In a riding head, a body having a.,

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