US819755A - Rock-drill. - Google Patents

Description

No. 819,755. PATENTED MAY 8, 1906. H. HELLMAN & L. G. BAYLES.

ROCK DRILL.

APPLIOATION FILED AUG.1o. 19o4.

S i usage such machines receive at t e hands of iran l sfrafrns PATENT orrioii.

i HENRY HELLMANAND LEWIS ooNDIor BYLES, oF JoHANNEsBURG,

l riniNsvAAL.

soon-DRILL. I

No. 819,755." i.

LEWIS CoNDIoT BAYLEs, citizens ofthe United States, residing at Johannesburg, Transvaal,

have invented certain-new and useful Im provements in Rock-Drills or Rock-Drilling Machines, of Which the following is a specification. e v L The present invention relates to rock-drilling machines or engines, and has for its object to provide an efficient and compact machine of comparatively small dimensions and one in which the operative parts are completely incased and the machine thereby rendered capable of withstandin -the rough the operators.

The improvementshave reference, iirst, to means for introducing the motive Huid into.

'the power-cylinder;l secondly, to means for feeding the machine or for traversing the power-cylinder longitudinally of its protecting and supporting casing; thirdly, to means for imparting rotarymotion to the power-cylinder and drill-bit or cutting-tool;..fourthly, to means for conveying a quantity of the motive fluid to or in roXimity to the cutting extremity of the drill) or bit to remove the rock cuttings from between'the cutting edges ofthe bit and the bottom of the hole, which luid by expansion serves to prevent the overheating of those parts through which it passes; ifthly, to .means for forming and directing around the mouth of the bore-hole a spray or sprays'of Water to meisten or saturate the pulverized rock issuing therefrom to cause it to settle andprevent it passing into the surrounding atmosphere, and, sixthly, to the f general construction and arrangement ot the machine, as hereinafter more particularly described, and'pointed out in the appended` claims.

. The several improvements constituting our invention will now be described in detail by 'aid of the accompanying sheet of drawins, Wherein.-

j pigure 1 representsl a longitudinal partsectional'elevation of the complete machine or engine; Figt 2, a transverse section on line m Fig. 1;Fig; `3, a transverse section on line y, y, Fig. 1 ;F1g. 4, a transverse section on line Iz z, Fight.' Fig. `5 is a transverse section on line 1... Figf isa transversesec- Specification of Letters Eatent. l Application iled August 10,1904. Serial No. 220,176.

`the column-bar or other sup ort.

assembling these v Patented may s', 190e.

I verse section on line z z', Fig. 1. Fi ..8 is a longitudinalsection of a portion of t e-rear end"of Y the machine and its attachments. Fig. 9 is a View of cap 12 detached as seen from the inside. Fig. 10is a view of cap 13 detached as seen from the inside. i

The machine' or engine -consists of3 the 1 power-cylinder 1, which is slidably supported inthe cylindrical casing 2. The cylindrical casing 2 is adjustably mounted in and carried by the sleeve 3, which latterV is constructed With the cone or tapered boss or projection 4, fitted With the bolt 5 for fixing it to Instead v of the cone 4 and bolt 5 the s eeve 3 may be provided With any other ordinary or suitable means for fixing it in position. is constructed With a central slot 6, which divides it into two arts or rings joined by the cone 5. ln the siht 6 andencircling the casing 2 is arranged a ring 7. (ShoWn in Figs. 1 and 4.) This ring7 is constructed'to -fo'rm a recess 8 onthe inside, in which is located a Wedge or tapered key 9. 4In the outside of the two parts of the sleeve 3 and longitudinally thereof are formed shallow grooves 1() 11, in which the back or parallel edge of the key 9 rests when it is in position vinside the recess 8 in the rin 7. .The tapered or inclined edge of the lgiey 9 its the recess 8, which latter is tapered to correspond.

arts the ringl 7 is first placed in position in the slot 6 in the sleeve `3 and the recess 8 brou ht into line with the grooves 10 11 and the rey 9 then projected The sleeve 3 y along the grooves 10 '11 through the recess 8l `9o The casing 2 is ,now projectedthrough the sleeve 3 and the inside of the ring 7. When the casing 2 hasj`been adjusted or laced in Athe desired positioninfth'e sleeve 3, t e Wedge y or key 9 is then drivenforward vin the recess 9 5 8 and by drawingfptlie ring 7 secures the-` casing 2 betweenthe 7 on the oneside f and the interior surfacel o the sleeve 3.at the opposite side.'l The grooves 410 11 in the .sleeve 3 prevent the'ring 7 and key 9 moving roo round the sleeve 3, and the casing 2 1s thereby securely iix'ed inside the sleeve V3.

. By driving the key 9 in the opposite direction the casing 2 is released, so that it may be moved longitudinally .of the sleeve in either direc 1:5 `tion and again secured inthe manner above described. v

The casing '2 1s fitted with ,the caps or covw ers 12 13 'at each end. The cap 12 for the front end of the casing 2, which is-securely iixed thereto by means of screws or otherwise, -is formed 'at the front with an eccentric boss or projection 14: The cap 12, as also the boss 14,v are bored to form a loose iit with the eXteriot1 of the power-cylinder 1, so that the latter may slide freely therein in either direc# tion.' Thus the ower-cylinder 1 isarr'anged eccentrically inslde the casing 2, as is clearly illustrated 1n Figs. 1 and 5 of the drawings.

'The cover 13 on the rear end of the protecting-casing 2 is secured in any convenient Inanne'r. This cover 13 is .constructed with an elongated boss 15, which formsla bearing for a short spindle 16'. On theouter extremity of this splndle 1 6 is keyed or otherwise secured 'wheel 18.

.designedto op crate without a crank 17, which serves for rotating said s indle 16in either direction. On the end of. t e spindle 16 inside the casing l2 is fixed a toothed wheel 18. Inside the casing ,2 and arranged longitudinally thereof are two parallel rods 19 20, the yextremities of which run in bearings 19a 20a',- -formed in the insideof the .caps 12 13,' respectively. On the rear ends of the rods 19 2Q are keyed pinions 21 22, which .mesh or gear with the toothed When the spindle 16 is rotated' by means of the crank 17, the two rods'19 20 are rotated through the mediumvof the toothed..

wheel 18'andpinions 21 '22.

23 is the cap, fitted on the rear end of the ower-cyl'inder ,11. This cap 23 may serve or inclosing thevalve-box'and valve which admits the motive side of the piston,

.ed with an annular. internal roove orrecess 26, and in -that portion of t e.eXtension 24 projectlng through the recess 26 are formed oles 27 ,.which place said recess 26,Y in comf iially unication with a hole 28'7 formed'longitudimunlcates with the interior of the cylinder `1. (See Fig. 4.) As seen in Fig. 8', the swivel 25 is preferably fitted with cup-leathersor other t eit I I vsuitable. packings piece 25isattach Serves :fOr-9 Y ,other motiv sagesl a er side of the annular recess 26 to revent leakage ofthe motive fluid from said swivel 25. To the swiveled the eXible pipe 29, whichJ ying the compressed vair or f and 30 vdesignates the pasy wivel. aloilgwhich said `iiuid flows fromthe flexible pipe 29 into the recess in th ports for vthat purpose.' Ar-v .,which meshes A allow 'the pinion 39 of saidextension 24, which hole 28 com-A 26. f The motive-fluid-sup ly pipe 29 passes through a suitably-curvedEholeBl formed in the cover 13. The hole 31 is curved inorder to prevent the pipe 29 coming into contact with the crank 17 and would` also operate to preventthe formation of a kink in the pipe 29,Cwhich would tend to throttle'the motiveflui'd supply by restricting the `area. f the inlet-passage v into or outof the casing 2 as t e power-cylin-I der 1 iswmoved in either a. forward or rearward direction.

The swivel 2 5 is constructed withtwo lugs or l which h/oles areformed projections 32 33, in

the two longitudinallyand through which arranged rods 19 20 ro'ect.

and so that the pi e 29 may pass projecting-throu h t e olesvin the 'swivel 25,

.act as guides an supports for the rear end of the ower-cylinder 1.

feeding the machine or for advancing or receding the ower-cylinder 1 in the casing 2 ed rod 19 is formed. in the lug 32 on the swivel-piece 25isfitted a nut 34,- formedwith the longitu inal1yarran with a screw-thread, an

an internal screw-'thread corresponding Atothe thread -on the rod -19, which screws .through it." The nut 34 is keyed, as at 34a in Fig. 4, or fixed any 'other'convenient manner in the swivel 25, so that it is incapa# ble of rotary or longitudinal movement there,

in.- When the rodl or screw `19 is rotated, the nut 34, and with it the swivel 25 and power- For the purpose of I cylinder 1, .are .traversed longitudinally of t e casing in either direction, corresponding tothe directlon offrotation ofthe screw 19.

On Vthe extension 24 next the swivel 25 is fixed a toothed wheel 35, which is shrouded or formed with ariiange'36 round the teeth on 'i the one side, 24 next. the toothed wheel.:35 is p laced .a washeror ring 37, twhich 'isvequal to or a proximately equal to the diameter -of-tllie wheel35. On the outer extremit 'of the eX- tension 24 screwed a nut 38, w "ch serves 11i-position thereon the swivel 25 for kee in toothe Wfeel M35,'-an'd washer 37.' Onthe other-longitudinally-arranged rod 20 at. the

is l-arrang'ed a pinion 39,

the lug' 33 the toothed wheel 35 and wih rear of is kept in gear vflange 36 on the one side. of the teeth 35 and the washer orrmg 37 on the other side. To

the rod` 20 while preventing it rotating ln'deendently thereof, a longitudinal .groove or eather-way 4.1 is formed in the rod 20, and inthe. pinion 39 is :fixed a feather-key 40, which proj e'cts intosaid feather-way 41. vThe 'swivel- 'iece 25'isfree to slide on the rod 2O e means described the feeding of the v En mac e and rotation of the power-cylinder 1, and with itthedrilling bit or tool 50, vare simultaneousl' are. accomplis ed in the following manner:-

.The' rotatlonof theA crank 17 rotates the therewith by means of thel to move longitudinally `of.

and on the end of the extension .irc

effected. These operations toothedA wheel 18 and through the medium of the pinions 21 22 the two longitudinally-arranged rods 19 20, as previously explained.

" The rotation of the screwed rod 19 causes the nut 34` to be traversed lon itudinally of said screw and being xed to t e swivel-piece and the latter being attached to the `powercylinder 1, the power-cylinder is accordingly moved forward or backward according to the direction of rotation of said crank 17, as may be required in the operation of the machine. The rotation ofthe other rod 204 drives the pinion 39, which, meshing with the toothed Wheel 35, rotates the power-cylinder 1 bodily in its bearings in the swivel-piece 25 and front cap or cover 12 of the casing 2. As the powercy inder 1 advances or recedes in consonance with the feed` mechanism the pinion 39-is free to slide longitudinally ofthe rod 20 on the feather 40 in the feather-way 41, hereinbefore described. 1

The means for supplying and directing one or more sprayls of water or other suitable liq` e bore-hole comprisesa swivel'` formed with two branches 46 47, to which are attached flexible pipes 48 49, the one communicating with a source of su ply of compressed or other gaseous uid an the other with a source-of supplyjQf water or other suitable liquid under pressure. The air-supply may be taken from the main supply-pipe, and it ma be referred to so connect the pipe 48 wit sai main supply-pipe as to admit the air to the swivel 42 simultaneously with its l y In the front of the swivel 42 four (more or less)small admission to the power-cylinder 1.

apertures 61 are formed, which communicate with the annular hole 44, through which a'pertures 61 the spray issues. vThese holes 61 may, if desired,' be slightly inclined outward Vto cause the spraysto encompass a larger areajo'f the rock-face.

The means we illustrate for rotating he drill o`r bit 50 in unison with the power-cylinder 1 are substantially those described and illustratedV in a prior application for United States Patent'led by us, Serial N o. 210,'519, `1n which the ower-cylinder has xed to it at the front en a cap'- 51, formed with a hole 52 Vof square or polygonal section, in which-fits `the shank end of the drill or bit 50, formed with a art of corresponding shape, which 1n- Sures t e s nchronous rotation of the drill or bit 50Iwit the power-cylinder 1. We also show-the shank-piece53, which serves for rev. ceiving and-transmitting lthe impacts ofthe feciprocalpiston to thedrilling-bit orboringtool 50. 54 is the resilient pad, and 55 a protecting ring or washer located in the front end of the power-cylinder 1 inside the cap 51 for receiving the impact of the shank-piece 53 should it be driven forward owing to the drilling-bit 50 n'ot being in contact with. or in close proximity to the bottom of the hole and at the same time for preventing the escape of the motive fluid round the inner shank of the bit 50. 56 is the port for admitting the motive fluid to the front end of the power-cylinder, and 57 the port which allows the motive fluid to escape round the piston and prevent g it reversing it when the shank-piece 53 is moved forward and the machine ut out of operation until such time as the s ank-piece 53 and piston are pushed back in the c lmder 1 by the feeding forward of the mac ne or otherwise. While we illustrate this particular arran ement, our present invention is not restrictedz to such a construction, and the several improvements forming the subject-matter of this ap lication may be employed or adapted to otlier constructions in which the drill-bit is preferably rotated by and in unison with the power-cylinder.

Themeans we provide for conductingfa quantit of themotive fluid from the frontend of t e power-cylinder 1 to the bottom of the hole being drilled consists in forming longitudinally through the shank-piece 53 a holey 58. The aperture 58 is ofsuitably-small dimensions, so that only a small'quantity of the motive fluid is able to'pass through it. vThe hole 58 in the shankiece 53 is increased in diameter at a short istance from the inner roo end. The object we have in view in increasing the diameter of the hole 58 is to utilize the fall in temperature which results, owing able that said piece 53 should be a fairly good" fit in the'bore of the cylinder the means1 de` scribed avoid the possibility of the shank-v piece 53 binding in the cylinder, as it wouldv do were the temperature ofthe shank-piece' 53w raised sufficiently.

A hole 59 is formed mngitudinauyof the drill-bit or cutting-tool 50. The hole 5 9 in the shank of the bit 1sA alined with the hole 58h11' the shank-piece 53, so that the motive fluid is free to flow from the shank-piece 53 along the hole 59 and to issue at orin` proximity to the cutting point or ed es of the bit 50'.- By

directing a uantity o the motive fluid in this manner Vetween the cutting edges of the tool and the bottom of the hole the rock cut-- tings are blown away from the cutting-face of the tool, and by the repeated reciproca- V tions of the tool 50, combined with the action of the motivel fluidissuing at the cutting- IlO point, the pulverized rock issues from the mouth of the bore-hole, where it is met by the sprays and the solid particles thereby satur-v atedv and caused to settle. downwardly-inclined and wet holes the water and particles of rock are kept constantly agitated and the cuttings are thereby prevented rom settling or accumulating in the bottom of the hole. by removing the cutt s from between the cutting ed es of the dril -bit and thev bottom of the ho e immediately they are formed the eiiciency of the bit is thereby materially increased.. The motive fluid, ilowing along `the drilling bit or tool- 50, also tends to prevent the undue heating of the same. It is,

well known that in the operation of rockdrilling machines or engines the cutting end o'r' the drill or tool ordinarily becomes Vvvery zovrnuch heated,- more especially in the drilling of'upwardly-inclined and dry holes, so much so thatthe durability of the` bit is thereby materiallyim aired l, v c What we -c aim as oui` invention, and' desire to protect. b Letters Patent, is-

1. In a rockmachine or engine, 1n

' combination, a casing,` a power-cylinder therein,v al cap iiXed at the rear end of1 the Tower-cylinder, 'formed with a rearward eX- tension, a swivel and adapted to admit' the motive iiuidthrough said extensionto the `power-c vlinder, a pipe for conducting-the-motive lui t'o said swivel, pacldngs arrangedat either side of said swivel to prevent from between the'swivel andthe extension upon which'it is arranged, .and 4 screw connectlons leading from the-outside of the cap and passing thiough the swivel,A for moving the power-cylinder. v

2. In a rock-drilling machine or engine, .in

combination, fa' casing, a power cylinder therein, a-capratf the-rearfend of the powercylinder, formed with a rearward extension,

a swivel arrangedy on saidnextensionformed withan internal annular recess, ports formedin saidextenslonfand placing said'extension 1D communication with the. power-cylinder and-packings itted'in the swivel to prevent fthe escape'of the motive fluid Jr'rom between the swivel and extension, and means for conducting-the motive fluid into said swivel, and

y screwv connections Iea'dingfrom the outside of the cap and-passing-through the swivel, for moving the power-cylinder.

`3. In a rock-drillingmachine or engine, in combination, a power-cylinder, Va c 'lindrical casingcomlpletely surrounding sai cylinder dab , and sli and rotatably sup orting. the same,iadri1 -orbit carried'at the orward end ofsaid cylinder, afe'ed-screw arranged longitudmally'ofalrd inside the protecting casing,

'a swivel looselyy embracin a part carried by avmg ab working In the case of".

It will be obvious that arranged on\'saidl extension the escape ofthe motive fluid yfor rotating the screw'to move they power#l cylinder in the protecting-casing.

4. In a rockdrilling machinel or'engine, in' combination, a power-cylinder,, a c lindrical' .casing completely surrounding sai cylinder and slidably and4 rotatably supporting the1 same, a= drill bit or toclcarried by the forward extremity of said' cylinder, a: swivel'- piece having passages'foileading the-motive fluid to the power-cylinder and. loosely embracinga part carried'- thereby' and having' ax workingconnection with a feed-screw, and means for rotating'v the screw to" movethe power-cylinder in the protecting-casing.

5. yIn a rock-drilling machinecr engine, in combination', a power-c linder, 'al protectingcasing in which said cy inden isslidably and rotatably mounted, a= drillbit or tool carriedbythe forward: extremity of'said cylinder, a swivel-piece having passages for leading' the motive fluid to the powercylinder and loosely connected therewith and' having "a working connection' with= afeedi-screw, v alpin# ion arranged on the rear end of said screw, a spindle carried by the protectingecasing', a toothedwheel;iXed-thereon and? gearingwith the ieedL screw, to move the power-cylinder in its protecting-casing.

6.- In a rock-drilling machine on engine,..incombination, a protectin"-casing, af powercylinder slidably mounts therein, a ca fit:- ted at therear end thereofl formed@ with a rearward4 extension, a swivel adapted to-in troduce the motive iiuid-intol'the'powereoyl'- inder throughsaid extension, a feedmut canried by said swivel, a feed-screw arranged lon itudinall'y of thecasing working through sai nut-1, a:toothed'wheeharrangedon the'ex* tension of the cylinder-ca a-rodor spindle arranged longitudinally o thecasing, a-pin- ICO ion mounted 'thereon and slidable longitudinally thereoi1 gearing thetoothed: wheel on the extension and means forrotatinig the feedscrew to feed the drill and forrot'atingthe rod or spindle torotate the-po-weucylinder,

substantially as descbea- 7. I'n a rock-'drilling machine or'engin'c', in' combination, a 'power-cylinder", a cap-fitted- Jward extension, a swivel mountedthereen for.

introducingy the motive fluid toi the` pow/ercylinder, means for introduoingthe-motive at the rear end thereofi formed' with a rear`- fluid to said swivel, a toothedwheelbnthe' I extension, a feed-nut carried'by the swivel, ai feed-screw supported longitudinallyoff the power-cylinder workin through sand-nut', a-

Irod or spindle arrangeI longitudinally ofthe` power-cylinder rojected t ough:A ra. holeyin the swivel, whic rod oryspindle-in conjunction withthe fee/screw serves to support IZO and'guide 'the lrear ofthe pow-efec linder; A a pinion on the extension.andl means* or com' pellin l saidpim'on'to rotate'withfsaid rod'or spmd e while permitting it' to slide -lcngituii-` nally thereof and' for compelling it t'oremain-` in gear with the' toothed wheel on theextension, and means for rotatingthe feed-screw and rod' or s indle to advance or recede the power-cylin er and for rotating the same, substantially as described.

8. In a rock-drilling machine or engine, in combination, a ower-cylinder, a protectin casing in whic said cylinder 1s slidabIy mounted, a cap fitted at the rear end thereof formed with a rearward extension, a swivel arranged on said extension, ports placing said Yswivc in communication with the power-cylinder, a toothed wheel on theextension, a feednut carried bythe swivel, a feed-screw journaled in the ends of the casing worln'ng throu h said nut, la pinion Xed' on the rear end O, said screw, a rod or spindle nj ournaled in the ends ofthe casing, a mion ngthe rod or spindle gearing the toot ed wheel on the cylinder-cap extension, means for compelsaid pinion to move longitudinally of thefro or s indle tb maintain it in gear with the toot ed wheel,` means for compelling said pinion to rotate with the rodor spindle while permittingit to slide longitudinally thereof, agspindlejournaled inthe rear end of the casing, a toothed lwheel fitted on the inner end thereof engaging the pinions on the rear end of the feed-screw and rod or` spindle and means for rotating said toothed wheel to rotate the feed-screw and rod ons indle to advance or recede the power-cylin er and to rotate the same, substantially as described. f

` 9. I narock-drilling machine orengine, in

combinationfa protectin -casing, a power-` .cylinder slidably mountetherein," a cap itted at the 'rear end of the-poWer-cyhnder formed with a rearward extension, uports formedin said extension communicating with the interior bf the power-cylinder, a swivel arranged `o`n said extension communicating through said portswith thewinterior of the lpower-c linder,= a pipe for conducting the motive uidto said swivel, an aperture formed in the end of the protect' casing or cover through which the motiveuid-supply pipe projects, a feed-nut carried by the swivelfra eed-screw journale'd in the ends of the protecting-casing working through said feednut, a pinion fixed on the rear endJ ofsaid feed-screw, a rod` journaled in thejends' of the; protectin -casing passin .through a vhole in the swivel, a pinion fixeon the rear end of' said rod, a pinion arr' ed on said rod and movable longitudinally thereoin a 'feather- Way formed therein, a toothed-wheel fixed on the cylinder-cap extension caring the pinion;

movable longitudinally of t e rod and means foilcompellin the inion toV remain in gear 6o:with'-the' toot ed wheel on the extensiomaIn spindle journaled in the ends ofthe rotecting-casing, a toothed wheel fixedfon t einner -end thereof, pinions gearing the inner ends of the'screw and rod and a .crank for rotatin y said spindle to rotate the screw and ro in combination, a

and securing' said protectin -casing through `the toothed wheel and pinions to feed and rotate the power-cylinder, substantially as described.

V10. In a rock-drilling machine or engine,

ower-cylinder, a protecting-casing in whic said c linder is slidably mounted, a cap fitted at t e forward end of saidprotecting-casing formed with an eccentric bore throughwhich the power-cylinder works, a cap fitted at the rear end of said casing, a screw journaled longitudinally of the casing and a parallel rod journaled in the ends of the casing, means for simultaneously rotating said screw and rod, a swivel carried on the rear end of the power-cylinder, said swivel carrying a nut through which the screwed rod works and through a hole in which swivel the rod projects to supportand guide the power-cylinder, means for introducing the motive fluid into said swivel, and gear-wheels on the rear end of the cylinder andflongitudinal rod for rotating the cylinder, substantially as'described. l 11.In a rock-drilling machine or engine, in combination, aprotecting-casin a power- 9o. cylinder slidably mounted in sai casing, aswivelfor conductin the motive iiuid to said cylinder said swive carrying a'feed-nut, a feed-screw journaled in the ends of the casing working through said feednut for' traversing the cylinder. lon itudinall of j the casing, a rod journaled in t e ends o the casing formed with a lon itudinal feather-way, apinon fitted with a eather-key traversing said featheri way to compel the pinion to rotate with the roo rod while permittin it to de longitudinally, a toothed whee secured at the rear end of the power-cylinder constructed with a shroud or iiange at one side and fitted Witha rin or washer at the other side of the teeth for eeping the pinion on therod inear with said toothed Wheel and for compe the A. pinion to move longitudinally of the rod as the cylinder is advanced or receded in the `protecting-casing, substantially as described. r 1o 12. In a nook-drilling machine or engine, in 'combinat1on, a power-cylinder, a protect- -casing nclosing thesame inwhichsaid cyler is slidably mounted ,means for mounting on a col- I 1 5 umn-bar or other support a justab e longitudinally 'of said protecting-casing, means located at the rearendof the oWer-cylinde`rfor admitting `the motive fluid) to either end of said cylinder, a feednut carried byJ/ usaid 12o means, afeed-screw journaled longitu ally of the` casing workingythrough'said nut for advancingand receding the power-c linder, a gear-wheel, carried bythe rear en of the power cylinder, a f longitudinally arranged I 2 5 i' rod jou'rnaled in the protecting-casing, a 1n- A.

ion mounted. thereon in gear with the w .eel -at the rear of the power-cylinder, said plmon' l being movable longitudinally of Vsaid rod, and

means for compellingsaid pinion to slidelon- .1go l ing-casing in whic gitudinally of th'e rod to maintain it in gear with the toothed wheel when the cylinder -is moved in either direction in its protectingcasing, and means for rotating the feed-screw c and rod, Substantially as described. l 13. In a rock-,drilling machine or engine,

ower-cylinder, a protectin combination, a

said cylinder is slidably mounted, a cap iitted at thel front end of said casing, a 4swivel mounted on said cap, apertures formed in said swivel forfdirecting, a spray or sprays around the mouth ofthe bore-hole, and means for conducting water and`A air 'to` said swivel to form the spray-or sprays, substantially as described. 14. In a rock-drilling machine or engine,

1 'in combination, a power-cylinder, a protecting-casing in which said cylinder is slidablymounted, a cap fitted at the i'ront end of said casing formed with an extension, a swivel mounted on`said extension formed with an annular hole, a piece formed with two branches attached to'said swivel and communicating with the annular hole, a pipe -conf nected to one branch for conducting compressed air or other gaseous fluid to the swivel and a pipeconnectedwith' the other branch Ass ' cutting en of the drill or tool toremovethefor conducting water'o'r liquid under pressurev to the'swivel, and a plurality of apertures formed in the Jr'ront of the swivel for directing a spray or s rays round the mouth ofthe bore-hole, su stantially as described. i

15. In a rock-drilling machine or engine,

in combination, a power-cylinder, a shank-- piece fitted in the forwardv end thereof which receives and transmits the impacts of the reciprocating ercussive member to the drilling bit or too -*formed with a longitudinal hole for permitting a quantityfof the motive fluid to ower-cylinder through said pass from the n shank-piece, a 'll bit or toolcarried by the forward endY of said power-cylinder and constructed 'to rotate in unison therewith and formed with a longitudinal hole which coin.

cideswith the 'hole in the shank-piece for conductinga uantity of the motive uidto the rock-cuttings and for keeping the shank! i'ece ing-casing in'whic described. p v

16` In a rock-drilling machine orengine, in combination, a oWer-cylinder, a protectsaid cylinder is slidably mounted, a ca fitted on the orward end of said power-cyinder formed with ,an extension, a swivel mounted on said extension con-v structed with an ,annular hole, a piece ttedL to i, said extension-swivel ,for-med with two,-` v branches, a pipe attached to lone branch for conducting compressed' air or otherv aseous iuid t o said swivel anda pipe attache `vto* the other branchl for conducting v'vat'er 'under pressure to said swivel, apertures formed in .th Viront of the swivel for directing round the'mouth of the'bore-hole, a

andldrilling bit or toolv cool, substantial y as' der which receives and transmits the impacts of the reciprocating percussive member to of square or polygonal section, a drill-bit formed with a portion of its shankror corre- (siponding section fitting said cap s'o-that the ill or bit is com elled to rotate in unison with the power-cylinder and with a longitu- .dinal hole for conducting the Huid passing hole to'blow out the rock-cuttings, substantiall5r as described.

17. In a rock-drilling machine or engine, in combination, a power-cylinder, a protectl mounted, a shank-piece iitted in the forward end of said cylinder formed with a hole longitudinally thereof for 'permitting aquantity of the motive fluid to pass throughit from the ower-cylinder, a drill or bit carriedj by the orward end of said cylinder engaging'the front end vof the shank-piece, means for compelling said bit to rotate iriunison with the power-cylinder, said bit being formed with a in progrimty to the bottomfof the hole for removing the rock-cuttings a swivel mountv 1 ed on the cap or front engiof' the protecting-'- pipes'communicatingwith said swivel y l casing,

`for con ucticompressed air or? cthermoswivel, aperturesf'ormed in the swivel for directing sprays round' the mouth of the bereescape from the bore-hol'e',means adjustable mountiig: andsecuringthe same, and means lfor' sim taneouslyjeeding and` rotating the power-cylindelin retecting-casin'g7 substantiallyas describ 18,. In a rock-drilling machine orrengine', incombination, a power-cylinder, a protect-- ing-casing inclosingisai'di cylinder, a capfitted on the front ci" sai cylinder formed with ancylinder slides, a swivel'meuntedon said ecto said swivel, apertures formed inthe swivcl' 'tive Huid an Water or other liquid! to said' longitudinally ofv the prlc'itectifng*-casingv for' for directing spraysvv around the meutht off-the carried'- bytheswivel, a eed-serewworkiig piece fitted in the forward endof said cylinthe drin-bit, said Shank-piece beingtimedV 5 with a longitudinal hole,- a cap fitted at the end of the power-cylinder formed with a hole through the shank-piece to' .the bottom of the ing'casing in which said cylinder i's slidably l longitudinal hole for conducting the motive fluid passing through the shank-piece to or hole to saturate the' particles ofl rockas they eccentric bess andboreainl which the powercentri'cboss, pipes cornmunieating with said swivell for conducting motive i'uidv and water the rear end of the power-cylinder, substan-- tially as described.

19. .In a rock-drilling machine or engine, L in combination, a protecting-casing, a powercylinder slidably mounted therein, a cap fitted at the rear, end thereof .and formed with `a rearward extension, a feed-screw arran ed longitudinally of said cylinder, a toot ed 2 wheel arranged on the extension of the cyltudinally of the casing, a pinion mounted thereon and slidably lon 'tudinally thereof in mesh with a toothed W eel on the eXten- 2 5 sion, and means for rotating nthe feed-screw to feed the drill, and for rotatin the rod or spindle to rotate the power-cy der, substantially as described. 20. In a rock-drilling machine or engine, 515 in combination, a. casing, a power-cylinder therein, a cap fitted at the rear end of the power-cylinder, formed with a rearward extension, a swivel mounted thereon for intro- 'ducing motive fluid to said cylinder, a ginde- 55 rod for the swivel, a feed-screw supported longitudinally of the power-cylinder, and connections whereby the feed-screw will drive the swivel, said connections including a piniomon the'aforesaid rear end ofthe cap, 40 and means for compelling said inion tofrotate while permitting it to sli e upon the guide-rod a oresaid, and for compelllngfit to -remain in gear with the toothed wheel on the extension,'and means for rotating the feedscrew. and the guide-rod to advance or recede the power-c linder-and fos` rotating the same, s'ubstantia y as described.

.21. In a rock-'drilling -machine or engine, in combination, a: ower-cylinder, a protecting-casing in whic said cylinder is slidabl mounted, a cap fitted at the rear end thereo and formed witlaa rearward extension, a

swivel` arranged-jonfsaid extension, ports4 lacing-said swivel in connection'with 'the S5 power-cylinder, atoothed wheel on the extension, afeed-screw journaled in the ends of the c and connecting with the swivel to drive t e same, a pinion fixed on the rear .p Vend of Said screw, a rod or spindle journaled 6 in the endsof the casing', a'pmion on the rod' or spindle. in mesh with the toothed wheelon the cylinder-cap extension, means for compeiling said pimon to move longitudinally'of thel rod or spindle to maintain it 1n ear with thgl ,toothed wheel, means for compe said `power-cylinder, a pipe for conducting' motive luder-cap, a rod or spindle arranged longipinion to rotate with the `rod or s indle while permitting itto slide longitudina y thereof, a spindle journaled in the rear end ofthe casing, a toothed wheel fitted on the inner end thereof engaging the pinion on the rear end of the feed-screw, a rod or spindle and means for rotating said toothed wheel to rotate the feed-screw and a rod or spindle toadvance or recede the power-cylinder and to rotate the same,` substantially as described;

22. In a rock-drilling machine or engine,' in combination, a protecting-casing, a powercylinder slidably mounted therein, a cap fitted at the rear end of the ower-cylinder and formed with a rearwar extension, ports 8o formed in said extension connecting withinterior of the power-cylinder, a swivel arranged on said .extension and connecting through said parts with the interior of the uid to said swivel, a feed-screw journaled in' the ends ofthe protecting-casing and con- ,nesting with the swivel to drive the same, a

pinion fixed on the rear end of said feedscrew, a rod journaled in the ends of the protecting-casing, and with which the swivel has a sliding engagement, a pinion fixed on the rear end of said rod, a pinion arranged onv said rod and movable longitudinally and nonrotatably thereof, a toothed wheel fixed on the cylinder-cap extension and connected with the pinion and movable longitudinally of the rod, and means for compelling the inion to remain in gear with the toothed w eel on the extension, a spindle journaled in the ends of the protecting-casing, a toothed wheel fixed on the inner end thereof, pinions gearing the inner ends of the screw and rod, and a crank for rotating said spindle to rotate the screw and rod through the toothed lwheel and inions to feed and rotate the power-cylinder, substantially as described.

23. In a rock-drilling machine or engine, combination, a ower-cylinder, a protecting-casing, in whic said c linder is slidably mounted, a cap fitted at t e forward end of said protecting-casing andprovided with an eccentric bore throu h which the power-cylinder works, a cap tted at the rear endof said casing, a screw 'ournaled longitudinally of the casing, a para l rod journaled/in the ends of the casing, vmeans for simultaneously IIO ' rotating said screw and rod, a swivel carried on the rear Aend of said power-cylinder, connections whereby the feed-screw drives the swivel, connectlons whereby said swivel slidably en ages .the rod to support the power-c lin er, means for introducing motive lui intosaid swivel, and gear-Wheelson the rear end of the cylinder and a lon 'tudinal rd for rotating thecylinder,` su stantially as described. i

24. In a rock-drilling machine or engine, in combination, a vprotecting-Casin a powercylinder slidably mounted in sai casing, a 13o IOO swivel lfor conducting the motive fluid to said cylinder, a feed-screw journaled in the ends of the casing and connections whereby the feed-screw drives the swivel for traversingthe cylinder longitudinally of the casing,

a rod journaledv in the ends of the casing, aV pinion slidably and non-rotatably mountedin combination, a power-cylinder, a protecting-casing inclosing the same and in which Y said cylinder is 4slidably mounted, means for mounting and securing said protecting-casing on a' columnfbaror other support adjustab e lon itudinallyrof said protecting-casing, means. or admitting the motive fluid to either end ofvsaid e linder, a feedscrewjournaled longitudinal y within the casing, and

connections, engaging the means for admit-Y ting the motive fluid, whereby the feedscrew is utilized for advancing and receding A.

nally-arranged rod journaled within the pro;

tectmg-casing, a pinion mounted thereon in gear with the wheel at the rear of the'powercylinder, said pinion b'eingmovable lon' itu dinally of said ro'd, and means-for com' e lin' said pinion to slide longitudinally of gli to maintain it in gear with the toothed'wli'eel when the cylinder is moved in either dii'eei tion in this protecting-casing, and means for rotating the feed-screw and rod, substan tially as desc `bed.

our hands in the presence of two' subscribing Witnesses.

lHENRY HELLMN. s l NLEWIS' CONDICT BAYLES.-

Witnesses: l

CHAs. OvENDALE, R.'()v1n\IDAL1'-1.4

In witness whereof -we have 'hereunto setv

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