US872417A - Rock-drilling machine or engine. - Google Patents

Description

PATENTED DEC. 3, 1907. H. HELLMAN & L. O. BAYLES. ROCK DRILLING MACHINE 0R ENGINE.

APPLICATION FILED JULY 12. 1905.

4 SHEETS-SHEET 1.

PATENTED DEC. 3, 1907. H. HELLMAN & L. 0. BAYLES. ROCK DRILLING MACHINE OR ENGINE.

4 SHBBTS-SHEET 2.

APPLICATION FILED JULY12. 1905.

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. R; 3\ on No. 872,417. PATENTED DEC. 3, 1907. H. HELLMAN & L. G. BAYLES.

ROCK DRILLING MACHINE 0R ENGINE.

APPLIOATION FILED JULY 12. 1906.

4 SHEETSSHEET 3.

. No. 872,417. PATENTED DEC. 3, 1907.

H. HBLLMAN & L. 0. BAYLES.

ROCK DRILLING MACHINE 0R ENGINE.

APPLICATION FILED JULY IZI 1905.

4 SHEETS-SHEET 4.

UNITE l HENRY HELLMAN AND LEWIS OONDIOT BAYLES, OF JOHANNESBURG, TRANSI/AAL.

ROCK-DRILLING MACHINE OR ENGINE.

To all whom it may concern:

Be it known that we, HENRY ITELLMAN and LEWIS CONDICT BAYLES, Citizens of the United States, both residing at Johannesburg, Transvaal, have invented certain new and useful Improvements 'in.Rock-Drilling Machines or Engines, of which the following is a specification.

Our invention has reference to drilling machines or engines, and in particular to that class of engine adapted to be actuated by compressed air or other elastic or expansive gaseous fluid.

The invention has for its es ecial object the providing novel and simpie means for producing and transmitting to the drill bit or oring tool an intermittent rotary motion.

The invention will now be described in detail by aid of the accompanying drawings, wherein Figure 1 is a lon itudinal elevation of the machine showing the external and supporting casing partly in section. Fig. 2 is a longitudinal section drawn to an enlarged scale,

the plane -of section being represented by the dotted lines Figs. 8, 9 and 10. Fig. 3 is a transverse section of Fig. 2 on line :c:x:. Fig. 4 is a transverse section of Fig. 2 on line y Fig. 5 is a transverse section of Fig. 2 on ine zz. of Fig. 2 on line wy. Fig. 7 is a transverse section of Fig. 2 on line 20-2. Fig. 8- isa transverse section of Fig. 2 on line y z. Fig. 9 is a transverse section of Fig. 2 on line Fig. 10 is a transverse section of Fig. 11 is a transverse Fig. 12 is a Fig.

Fig. 2 on line y y. section of Fig. 2 on line zz. transverse section of Fig. 2 on w -y.

'13 is a transverse section of Fig. 2 on line Fig. 14 is a transverse section of Fig. 15 1s a longitudinal'section of the front head and a portion of the front end of the ower cylinder showing a slightly modifie construction. Fig. 16 is a transverse section of a portion of the external casing and the adjustable supporting sleeve, illustrating a modified-means for securing the latter round the casing, and

' Fig. 17 is a sectional elevation of the front end of the machine showing the power piston and impact piece in their inoperative positions, when the machine 1s used as a nonporoussive machine.

In the drawings 1 is a hollow cylinder .which constitutes a protective casing in Fig. 6 is a transverse section Patented Dec. 3, 1907.

which the machine roper-is slidingly mounted or adapted to e moved longitudinally thereof in either direction.

2 represents a sleeve or band which encircles the rotective casing 1 and serves for adjustab y attaching the same to a column clampor other supporting device. The construction of this sleeve 2 is fully illustrated in Figs. 1 and 9. As shown it consists of the split band or sleeve constructed with thecone 3, by which it can be firmly secured in a column clam Instead of the cone 3 it may be otherwise constructed to allow of its being attached either to a column clamp or any other suitable support.

One end of the sleeve 2 is bifurcated or constructed with the two parts 4, separated by a space 5, and the other end 6 is shaped to project into or fit the bifurcation. The ends of the parts 4 and the end of the part 6 are turned upwards and inwards in the form of hooks 7 (see Fig. 9). When the band 2 is encircling the casing 1 and the part 6 is in the bifurcation a space 8 is left between the upturned or hooked parts 7, in which space 8 is placed a taper key 9. When the key is driven in one direction it forces the part 6 forward into the bifurcation, reduces the internal diameter of the sleeve and so tightens it round the casing 1. When the keyis driven in the reverse direction, the band 2 releases its grip of the casing 1 and allows the casing to be adjusted therein or moved the recesses 8. Over the projections 7-is arranged a tapered key 9 w iich is shaped to fit the recesses 8. This key 9 when driven in one direction draws the projections 7 a toconstructed with the projections 7 forming gether and so tightens the sleeve 2 on the a casing 1.

The power cylinder represented at 1-1 is arranged concentrically inside the protective casing 1 and adapted to slide longitudinally thereof in either direction within certain limits. In the forward end of the casing land encircling the power cylinder 11 is a bushing 12 shown secured to the end of the casing 1 by means of rivets 13. The internal diameter of this bushing 12 is such that it makes a gdod sliding fit with the ower cylinder 11. In thebushing 12 and ormed parallel with the longitudinal axis of the casing l or at any suitable angle or in-' I tuating fluid from said casing 1 towards the face upon which the machine is operating to prevent any of the cuttings emanating from 23 is made of the same shape in transverse the bore hole being thrown in the direction of the machine. Exhaust ports 15 y are shown formed in the forward end of the casing 1, which may be used either alone or in conjunctionwith the ports 14in the bushing 12, or if preferred, be dispensed with when the latter are employed.

The power cylinder 11 at its forward end is shown constructed with an external screw thread 16 round a reduced portion 17. Over this portion 17 is screwed the front head .18. The front head 18 is constructed with a hole 19 of square, or other polygonal cross section, and at the rear of the hole 19 with a cylindrical cavity 20. In the forward end of the power cylinder 11 is located an impact piece 21 which serves to receive the impacts of the power piston 22 or reciprocating percussive member and to transmit the same tothe drill bit or boring tool 23. The impact iece 21 in its rear portion is made a sliding t in the bore of the power cylinder 11, and

in its front portion is made somewhatlarger forms an abutment or shoulder 24 for the enlarged front portion of the impact piece 21. The shank'end of the drill steel or bit section as the transverse section of the hole 19 in the front head and so that it may slide longitudinally thereof, but is compelled to rotate with it. 1 -tndinally of the drill steel 23 along which ofsaid bit, which converts the comminuted dust.

A hole 25 is formed longiwater is conducted to the cutting extremity rock or cuttings into sludge and prevents it emanating from the bore-hole in the form of A small hole 26 is formed longitudinally of theimpact' piece 21 through which a quantity of the actuating fluid ay pass from the front end of the power cy fi nder 11 to assist in forcing the water through the steel 23 and ejecting the cuttings from the bottom of the hole being drilled. Inthe front end of the impact piece 21 is formed a hole 27 somewhat larger in.diameter than the hole 26 which leads into or communicates'with it at the bottom.

Round the enlargedpart of the impact piece 21 isformed an" annular groove 28, and from the annular groove 28 ports or passages 29 are formed communicating withthe hole 27 at or near the bottom or at the point clined in a forward direction from the annuwater asses from the annular groove 28 to the ho e 27 and from the latter along the coincident hole .25 in the drill steel 23. The actuating gaseous fluid passing along and -by tending to create a vacuum 1n the and conveys it along the hole 25 in the drill steel 23 to the=cutting extremity-thereof.

Round the front head 18 is arranged a swivel ring 30. This swivel ring 30' on the one side rests against a'shouldern31 formed by an abutment on the front head 18 and on the other side is held in position by means of a nut 32 and locknut 33 screwed over the front head 18. The swivel ring 30 is constructed with an internal annular groove or recess 34 and through the front head 18 are formed holes 35 which place said annular groove 34in communication with the annuimpact piece21 has a imited movement inside the front head' 18 (when it pushes the head 18 at any position said impact piece 21 may assume in thefront head 18.

In a hole 36 in the swivel ring 30 which is arranged a hose stem 37 formed with a The stem 37 is revolubly attached to the swivel ring 30 by means of the-screw plug 39. To the outer extremity of the stem 37 is at tached the hosepi e 40 by means of the hose-clamp 41. Tfiis construction rovides a convenient detachable connection etween the hose 40 and swivel 30 and obviates the defects of the previous constructions of su'chdevices. The hose pipe 40 may lead v the water will be drawn hy suction or forced by pressure into the swivel ring 30 and from drill steel 23. r

In the modified construction illustrate in longitudinal section in Fig. 15, the impact piece 21 as a separate part is dispensed with,

in one piece with the cylindrical extension 21 of reduced diameter which projects in a rearward, direction'th'rough. the front head 18 into the forward end of'the bore of the cylinder 11. The hole 25 along which the water is conducted toithe cutting end of the drill steel 23 is carried through to the inner end. of the shank 'so that a quantity of the largroove 28 in the im act piece 21. 'As the.

head or enlargement 38 at the inner end.

to any source of Watersupply from which and the shank of the drill 23 is constructed 5 where .the hole 26 opens into it., These ports or passages 29 areas shown'preferab ly I angularly disposed-in relation. to .the longitudinal axis of the impactpie'ce 21 and inlar groove 28 to the-hole 27. The 'orts 29 serve as the water ducts along ,w 'ch the the hole 26 as it enters the hole 27 expands, I

water ducts 29 draws the water by suction drill steel 23 forward) the annular groove 28 is made sufficiently wide to remain in communication with the ports 35in the front,

communicates with the annular groove 34 the latter through the impact piece 21 to the cylinder 11. The annular recess 28 is formed in the front head 18 and the angular made of any suitable polygonal transverse with the internal annular groove 34 is arthe same manner.

a tion with the annular groove/34' in the '20 .and' prevent the reversal of the piston 22 tudinallyof the cylinder 11 is formed a port '45 i for the forward end of the haust port for the power cylinder exhaustport 43 for the forward end of the cylinder said recess 28 and the longitudinal hole25 ,tsecurely attach it thereto.

close said exhaiist .4 minder 11 is the valve 44 which. controls the actuating fluid may pass along it out of the and forwardly inclined ports 29 between are formedin the cylindrical extension 21 of the shank; The part-23 of the shank is olygonal hole 19 in'the he swivel 3O constructed section to fit the front head 18.

ranged round the front head in a similar manner. to that described with reference to Fig. 2, and is secured thereon by means of the nut 32 and lock-nut 33 in precisely The holes 35 are formed radially or otherwise in the front head to, place the annular recess 28 in communicaswivel piece 30. The swivel piece 3O is constructed with the tapped hole 36 for the hose 'connection' The front head 18 is shown screwed over the front end of the power cylinder 11 as indicated at 16 to An exhaust port 42 is formed in the front end of the power cylinder 11 which in the normal running of the machine is closed by the -im act piece 21, or (as in the arrangement sliown in Fig. 15) by the inner end of In the event of the the exhaust port 42 and the piston 22 overlapping the supply port 43 then any actuatinlg fluid which may leak past the piston 22 W' l escape through said exhaust ort 42,

untilthe impact piece 21 is moved back to v port 42. f Attached to the rear end of the power cyladmission of the actuating fluid alternately .to either end of the power piston 22; Longi- 43 which constitutes the main supply port ower cylinder 11 and communicates with t e latter at the rear of the impact piece 21. 45 is the exing into the protecting caslng 1.

The rear end of the power-cylinder 11 is formed with an external screw thread 46. Next the end of the cyli der 11 is laced a valve plate 47 which is 'ormed wit a hole 48 communicating with the main supply 11 and'with a central hole 49through which 'the actuating fluid passes from the valve 44 t0 the rear end of the power cylinder 11. 50-is the valve box in which is arranged the valve 44. The valve 44, valve box 50 and the valve plate 47, are'retained in position by means of the hollow cylindrical piece 51, which constitutes the valve box cap which is screwed over -the rear end of the power 1 which is adapted to automatically control the admission of the actuating fluid to either end of the power cylinder 11.

In the valve box cap 51 and round that portion which incloses the valve box 50 are formed a number of ports 52 which serve as the exhaust ports from the valve 44 and communicate with or open into the protective casing 1. In the circumference of the valve box cap 51 is constructed an annular groove in which are located a packing ring 53 and a packing ring spring 54, which serves to keep said packing tlghtly pressed against the internal walls of the outer-casing 1 and so prevents the passage of the actuating fluid admitted to the casing 1 at the rear of said packing 53 passing to the front portion of the casing or beyond said packing. 55 is a port which constitutes the inlet for the gaseous fluid to the valve 44. This port 55 communicates with the interior of the valve box cap 51 at the back of the valve box 50 and the actuating fluid enters the valve box 50 through the supply ports 56, 57. 58 is a port communicating with the port .43 for the forward end of the cylinder.

In the center of the valve box cap 51 is a screw threaded hole in which is screwed a cylindrical piece 59 which constitutes the ratchet box. This piece 59 is made hollow at its rear end and on the inner surface is constructed with ratchet teeth 60 as seen in Fig. 7. Between the ratchet box 59 and the end of the valve box cap 51 are interposed a number of rings or liners 61, which serve for taking up any play resulting from wear between the rotating surfaces, the

free to rotate relative to a hollow c lindrical piece 62 and the tail pipe 63 to w ich it is attached. The hollow cylindrical piece 62 surrounding the ratchet box 59 is at its forward end constructed with a flange 64 which fits into a recess formed between the valve box cap 51 and ratchet box 59. In an annularrecess formed round the cylindrical piece 62 and valve box cap 51 and inclosing the joint betweenthem, is a leather or other suitable ring ,65, and'66 is a spring arranged round the leather ring 65.

Screwed into the rear end'of the cylindrical piece 62, is a tail pipe 63, which extends for some distance in a rearward direction through the rear end of the protective casing 1. This tail pipe 63 is as shown made tail pipe 63 and screwed over the rear end of the protective easing 1 is the casing cap 67 which internally is made of the same shape as the external'shape of the tailpipe 63, or otherwise constructed to prevent'said tail pipe 63 rotating therein. Round the tail pipe 63 at the rear end of the casing cap 67 is placed a cup leather packing 68 and gland 69, secured by the gland nut 70 screwed over the end of the casing cap 67.

The bore or interior walls of the tail pipe 63 are made parallel for aportion of their length, say to the point a, then tapered i11 wards for a portion of their length or to the point-b and then made parallel to the end, where it abuts therear endof the ratchet box 59.

Inside the tail pipe 63 is arranged a cylinder 71 which is tapered for the greater portion of its length to correspond to the tapered portion'of the bore of the tail pipe 63. cylinder 71 made a tight fit with the interior of the tail pipe 63. I

In the cylinder 71 is located a piston 72 which is constructed with a rearward extension or tail piece 73. This tail piece 73 projects into a hole 74 in. the rear end of the cylind'er 71 and when the piston-72 is reciprocated inside the cylinder 71 it moves backwards and forwards therein. Inside the cylinder 71 and round the inner end of the hole 74 is screwed a nut 75 (see Fi 5) which is shaped internally to correspon to the shape of the tail piece 73 and serves for preventing the rotation of the piston 72 inside the cylinder 71. The piston 72 is constructed with a longitudinal hole 7 6, in front of which is fitted a rifle nut 77, through which works a rifle bar 78. The rifle bar 78 at its forward extremity is constructed with ahead 79 which is located in the ratchet box 59. In circular recesses 81 formed in this head 79 are fitted the ratchets or pawls 82 which are maintained inengageinent with the ratchet teeth 60 in the ratchet box 59 through the medium of pins 83 and springs 84 located in holes formed in the head 79. fitted in holes formed in. the front end of the head 79 and rear end of the ratchet box 59 on the inside to maintain true axial alineinent of these parts. of the head 79 of the rille bar 7 8 and the forward end of the cylinder 71 is located a rotation washer or plate 86 which serves to keep the pawls 82 in position in the head 79 and in engagement with the ratchet teeth 60, and alsoacts as a bearing for the forward end of the rifle bar 78. The hole 76 in the piston72 into which the rifle bar 78 projects is made sufiicient ly deep to allow for the full stroke of the piston 72, and the parts are so arranged that when the piston 72 is at the end This A steady pin is Between the rear end sent the main'supply ports and 90, 91,'the.

exhaust ports. 92 is a small port fro m the interior of the cylinder 71 to the valve 93 by means of which air is conducted for reversing the position of the valve 93. The actuating fiuidis admitted to the protective casing 1.

through an inlet 94in the casing cap; 67.

This inlet 94 is fitted with a bush 95 formed with an internal screw thread adapted to receive the throttle valve on the actuating fluid supply pipe. To the inner end of this bush 95 is fixed a gauze wire strainer 96 which Y serves for preventing the ingress into the machine of any particles of solid matter or other impurities that may be contained in or carried by the actuating fluid. This strainer 96 being fixed to the inner end of the bush 95 provides a ready means for removing it when required to cleanse it or for any other purpose. The actuating fluid passes from the inlet 94 along the groove 97 into the rear end of the protective casing 1. end of the tail pipe 63 is formed a port 98 In the forward which communicates with the port 89.' A similar port (not shown) is formed in the tail pipe 63 communicating with the port 88.

On the rear end of the c linder 71 is fixed a I valve plate 99 and next t e valve plate 99 a valve box 160 in which is locatedthe valve actuating gaseous fluid passes from the pro 'tective casing 1' communicates with the.

valve box 100 by theport 89, as seen in Fig. 2. At the rear of the valve box 100 is placed a circular plate 102 which in the outside is formed with a recess 103. In the rear-end of the tail pipe 63 is located a crosshead 104 which is fixed by means of the bolts -105 These bolts 105 also serve to secure the handle 106 to the rear end of the protective casing 1. At the center of the crosshead 104 is arranged a belt 107 fitted-with a locknut 108 which at its inner end projects into the recess 103 in the circular plate 102 and serves to secure in position the parts at the rear end of the cylinder 71. The handle 106 is provided for the purpose of retracting or sliding operated upon.

the machine in a rearward direction inside the protective casing 1.

On the casing cap 67 is fitted an oiler or device 109 for introducing a lubricant between said cap 67 and the tail pipe 63.

The manner in which the machine operates is as follows :The actuating fluid ontering at the inlet 94 after passing through the strainer 96, passes along the port ,97 in the casing cap 67 into the rear end of the protective casing 1. From the casing 1 it passes throu 11 the port 55 into the rear end of the valve ox cap 51, and the" valve 44 is thereupon-automatically actuated to alternately admit the fluid to either end of the power cylinder 11 or either side. of the power piston 22 and to place the same in communication with exhaust through the ports,45, 52, protective casing 1 and ports14, 15 in the bushing 12 and forward end of the protective casing 1. The actuating fluid being unable to pass the packing ring 53 exerts its expansive force on the rear end of the valve box cap 51, keeps the power cylinder 11 pressed forward and therock-drill or bit 23 up to its work or incontact with the surface of the rock being By this means the drill 23 is automatically fed forward as the hole deepens. The actuating fluid being used at its initial pressure for the purpose of feeding the drill,it is only requisite to provide a comparatively small area upon which the fluid can act to accomplish this. The attachment tothe rear end of the valve box Cap 5101 power cylinder 11 inside the protective casing 1, of the cylinder 71, by reducing the area upon which the fluid can exert its pressure, permits of its being utilized as the means for feeding the drill. At the same time the actuating fluid passes from the external casing 1 through port 98 into the port 89 and along the latter to the valve box 100, and by means of the valve 93 is antomatically admitted alternately through the opening 101 and'port 87 to the rear and front end of the piston 72. In Fig. 2 the valve-93 is shown placing the rear end of the piston 72 in communication with the port 89 to admit the actuating fluid, and with the port'87 communicating with the front end of said piston 72, open to exhaust. The actu ating fluid forces the piston 72 in a forward direction andthe latter being restricted to a rectilinear non-rotative motion inside its cylinder 71, the nut 77 rotates the rifle bar 78 and with it the head 79. The ratchet box 59 being rigidly attached to the valve box cap 51 and through the latter to the power cylinder l1 imparts a corresponding intermittent rotary motion to s 3 power cylinder 11 and through the latter to the drill or bit 23.

Once the machine is brought into operation its action is continuous until it reaches thelimit of its forward travel. The forward movement of the powercylinder 11 in the protecting casing 1 is limited by the annular projection 110 formed round the rear end of the power cylinder 11 engaging the rear end of the bushing 12 in the front end of the easing 1. When the machine reaches the end of its forward movement, the piston 22 then by driving the-impact piece 21 and drill or bit 23 forward, overlaps the ort a3 and the actuating fluid escaping by tfie exhaust port 42 automatically puts the power cylinder 11 out of operation. It is then necessary to retract the machine in the casin 1 and after removing the drill or bit and inserting a longer tool, the machine is again brought into operation.

In the operation of the machine, in the event of soft material being encountered in which the ordinary bits as employed in percussive tools would so far penetrate the material as to render their rotation impossible and to render the rotative ear inoperative, then the drill or tool could be replaced by one of the auger bit type (see Fig. 17). The shank of such auger bit would be made somewhat shorter than the bits for percussive tools; After the insertion of such a bit, on again starting the machine, the piston 22 would overrun the inlet port43 for the forward end of the power cylinder 11 and the actuating fluid then escape from the cylinder 11-by the ports 42. When the piston 22 is in this position the percussive apparatus would be put out of operation, while the rotative gear would remain in action and the boring be continued with the auger bit 23". Such an arrangement is represented in Fig. 17 of the drawings. In this figure the shank 23 of the auger bit 23 is made somewhat shorter than the bit shown in connection with Fig. 2, so that it does not project so far into the bore of the front head 18. This permits the impact piece 21 and'piston 22 to assume the positions in which they are shown in Fig. 17, which results in the percussive apparatus being put out-of operation while the other parts of the machine are permitted to operate as previously described.

The means for mounting the rock-drilling machine hereinbcfore described, and shown in Figs. 1, 9 and 16 of the accompanying drawings, constitute the subject-matter of an application, Serial No. 327469, iiled July 24, 1906, for Letters Patent of the United States; and the water-supplying attachments for rock-drilling machines. which are hereinbefore described, and illustrated in Figs. 1, 2, 12 and 15 of theqrccompanying drawings, constitute the sub ect-matter of an application, Serial No. 327470, also liled July 24, 1906, for Letters Patent of the United States.

What we. claim as our invention and desire to protect by Letters Patent is 1. In a drilling or boring machine or engine actuated by fluid pressure, in combination, a casing, a hollow or tubular piece slid- 0 erated y the piston for transmitting to tl ie revoluble piece and drill or bit an intermittent rotary motion in one direction, and means for admitting the fluid to reciprocate said piston.

2. In a drilling or boring machine or engine actuated by fluid pressure, in combination, a casing, a hollow or tubular piece slid- I ingly and non-rotatably carried by said casmg, a head or tool holding device revolubly attached to the forward end of'said tubular piece inside the casing, a drill or tool operativelycarried therein, acking between the exterior of said revolub e head and the interior of the casing, means for introducing the actuating fluid to the casing at the rear of said packing to feed the drill, a plston 1n the tubularpiece, means operated by the piston for transmittin to the revoluble piece and drill or bit an mtermittent rotation in one direction, a valve located in the tubular iece for alternately admitting the actuating fluid to either end of the piston, and means for introducin the actuating fluid to said tubular piece an valve- 3. In 'adrilling or boring machine or engine actuated by fluid pressure, in combination, a casing, a hollow or tubular piece slidingly and non-rotatably carried by said casing, a head or tool holding device, a drill or tool operatively carried therein, packing between the revolnble head and easing, a cylindrical piece or ratchet box fixed to the tool holding device, a swivel revolubly attaching said ratchet box to the forward end of the tubular piece, a piston in said tubular piece, means for permit-ting said piston to reciprocate therein while preventing it rotating, a rifle nut carried by said piston, a rifle bar working through said rifle nut constructed with a'h'ead located in the ratchet box, said head carrying ratchets adapted to be moved in one direction to rotate the ratchet box and tool holding device and free to move in the reversedirection, and a valve and valve box carried by the tubular piece for alternately admitting the-actuating fluid to either side of the piston to reciprocate it.

4. In a drilling or boring machine or engine actuated by fluid pressure,-in combination, a casing, a hollow or tubular piece of polygonal external section, a cap or cover on the casing shaped internally to correspond to the tubular piece and fitted with a gland through which the tubular piece works, a

enter? revoluble head or tool holdin device, a drill V or tool operatively carried t erein', packing between the revoluble head and easing, means for admitting the actuating fluid to the casing atthe rear of said packing, ,a cylindrical piece or ratchet box fixed to the tool holding device, a swivel revolubly' attaching I said ratchet box to the forward end of the tubular piece, a cylinder in said tubular piece, a piston in said cylinder constructed with a tail or rearward projection, a nut in which said projection works to prevent the rotation of the piston while permitting of itsreci rocation, a valve and valve box carried at t e rear of the cylinder inside the tubular piece the cylinder being constructed with ports placing the casing in communication with the valve box and the latter alternately in communication with either end of the cylinder, a rifle nut carried by the piston, a rifle bar working throughsaid rifle nut, said riflebar being constructed with a head located in the ratchet box, ratchets or awls carried by said head for locking the ri e bar to the ratchet box and tool holding device when moved in one direction by the piston.

and rifle nut.

5. In a drilling or boring machine actuated bv fluid pressure, the combination of a rotatable power cylinder, a cylinder revolubly connected totheLrear end of said power cyl' inder, means for preventing rotation of said rear cylinder, and means carried by said rear cylinder for rotating the power cylinder.

6. In a drilling or boring machine or engine actuated by fluid pressure, the combination of a rotatable power cylinder, a cylinder lOQ revolubly connected to the rear end of said 8. In a drilling or boring machine or engine actuated by fluid pressure, the combination with a rotatable power cylinder and percussive apparatus carried thereby, of an outer shell or casing in which said cylinder is'slidingly and rotatively mounted, a second cylinderrotativcly connected to the rear end of the power cylinder, means for preventing rotation of said second cylinder, and means located in said second cylinderifor rotating the power cylinder by means of the actuating fluid. I

9. In a drilling or boring machine or engine actuated by fluid pressure, the combination with a rotatable power cylinder of percussive apparatus therein, an outer casing in which said cylinder is slidingly and rotatively carried, means for feeding the drill by the pressure of the actuating fluid, a second cylinder rotatively connected to the rear end of the power cylinder, means for preventing rotation of said second cylinder, and means located in said second cylinder actuated by means for admitting the actuating fluid to the power cylinder to actuate the percussive apparatus, means for utilizing the pressure of the'actuating fluid to feed the drill, a second cylinder rotatively connected to the rear end of the power cylinder, means for preventing rotation of said second cylinder. and

means located in said second cylinder for I rotating the 'power cylinder by the pressure K which said power cylinder ,is slidingly and rot'atively' carried, means carried by said cylinder for admitting the actuating fluid to said power cylinder to actuate the percussive apparatus, a second .cylinder rotatively connected to the rear end of the power cylinder,

' means for preventing rotation of said cylinder, means located in said cylinder adapted to be actuated by fluid pressure for rotating the powercylinder, and means for admitting alternately'toeither end of said rear cylinder the actuatingfluid to actuate the mechanism for rotating the power cylinder.

12. Ina drilling or boring machine or engine, the combination of a rotatablepower cylinder and percussive apparatus therein, an outer casin means carried by'the power cylinder for a mitting the actuating fluid to said cylinder to actuate the percussive apparatus, means for supporting the drill bit or tool at the forward end of said power cylinder, said means compelling the bit or tool to retate with the cylinder, means for utilizing the pressure of the actuating fluid to feed the drill',"a second cylinder rotatively connected to the power cylinder at the rear end, means for preventing rotationiof said second cylinder, means interposed between the power cylinder and rear cylinder for imparting rotary motion to the power cylinder, means located in the rear cylinder for actuating said rotative gear, and means carried by the rear cylinder for controlling the admission of the actuating fluid to said cylinder to operate said rotatin gear. r

13. In a drilling or boring machine or 'engine, the combination of a rotatable power cylinder and percussive .apparatus therein, an outer casing in which said power cylinder is slidingly and revolubly su aported, means for admitting the actuating uid'to therear end of said casing, means carried by the power cylinder for admitting the actuating fluid to said cylinder to actuate the percussive apparatus, means located at the rear of the power cylinder which by confining the motive fluid at the rear end of said cylinder utilizes the pressure of said fluid tofeed the drill, a tail pipe revolubly attached to the rear end of the power cylinder, means carried. by the casing for preventing the rotation of said tail pipe, a cylinder locatedin said tail pipe at the rear of the power cylinder, rotating mechanism interposed between the two cylinders, meansin the rear cylinder for actuating said rotating mechanism, and means carried by the rear cylinder for admitting the actuating fluid alternately to either i end of said cylinder to operatethe rotative-mechamsm. y

14. In a drilling or boring machine or engine, the combination of a rotatable power cylinder and percussive apparatus therein, a protective casing: in which said cylinder is slidingly and rotatively carried, a tubular tail piece revolubly connected to the power cylinder, inside said casing, ratchet mechanism located between said tailpiece and power cylinder adapted to impart an intermittent rotary motion to the latter, a cylinder supported in the tail piece, a piston arranged in said cylinder carrying a nut for engaging a rifle bar actuating the ratchet mechanism, means for admitting alternately to either end of said piston a quantity of the actuating fluid to actuate the ratchet mechanism to rotate the power cylinder about its point of attachment to the tail piece, and connections for preventing the rotation of the tail piece, cylinder and. piston.

15. In, a drilling or boring machine or engine, the combination of a rotatable. power cylinder and a reciprocating percussive member therein, means for slidably and nonrotatably supporting a drill or bit in the forward end of said cylinder in position to receive the impacts of said percussive member, an outer protective casing inclosing said power cylinderand permitting rotation of the latter, a valve and'valve box carried by the power cylinder for controlling the admission of the fluid thereinto to actuate the percussive member, a, valve box cap securedto the rear endof the power cylinder, packing located between the valve box cap and the inside of the casing which packing forms said valve box cap into a piston to feed the drill by the fluid pressure, a cylinder revolubly 40 by said power cylinder and means for comin said power cylinder, means for slidably and non-rotatably supporting a drill or bit in the forward end of the powercylinder in po sition to receive the impacts of the percussive member, a valve and valve box carried at the rear end of the power cylinder for admitting the actuating fluid alternately to either end of the power cylinder, a valve box cap secured to the rear end of the power cylinder, packing located between said cap and the interior of the casing, a port in said cap placing the valve box incommunication with the casing at the rear of the-packing for admitting the actuating fluid'to the rear of said valve box cap, a tail pipe or extension of polygonal external section revolubly at-' tached' to the valve box cap, a cap fitted at the rear of the protecting casing through which the tail pipe works, packing between ,said cap and tail pipe, a piston in said extension, a valve carried by'said, extension for controlling the admission of the actuating fluid to either end of said piston, and means actuated by the piston for imparting an intermittent rotary motion to the power cylinder and bit, substantially as described,

17. In a drilling or boring machine or engine, a rotatable power cylinder, containin percussive apparatus, a drill or tool carrie pelling said drill or tool to rotate with said cylinder, a second cylinder rotatably connected to the rear end of said power cylinder, means for preventing rotation of the second cylinder, means carried by said second cylinderfor rotating the power cylinder, and a valve and connections for retaining the rotation means in action when the percussive apparatus is put out of operation.

18. In a'drilling or boring machineor en gine, a casing havin a bushing secured to the forward end of the casing and provided with holes or ports, a power cylinder slidably and rotatably fitting said bushin means for rotating said power cylinder, an a tail piece rotatably engaged with the power cylinder and held by the casing against rotation.

19. In a drilling or boring machine or engine a casing'havin a rear cap a power cylindei' rotatively and slidably mdunted in'said casing and non-rot atably carrying a'drill or bit at itsiorward end, a tail piece or pipe slidably and non-rotatably fitting said rear cap and revolubly attached to the power cyl-,

inder within the casing, packing surrounding the rear end of the'power cylinder and. ar-

' rangedbetweensaid cylinder and the interior of the casing, and means for supplying fluid under pressure to the casing at the rear of said packing, i i-combination with means for imparting intermittent rotation to the 5 power cylinder and including a piston mounted for reciprocation in the tail piece or pipe and held against rotation therein, a rifle nut carried by the piston, a riflebar engaged by said'nut, and a pawl and ratchet mechanism connecting said rifle bar with the rear end of the power cylinder.

20. In a drilling or boring machine or engine, a casing, a power cylinder rotatively and slidably mounted in said casing and nonrotatably carrying adrill or bit at its forward end, a tail piece or pipe. slidably and non-rotatably fitting the casing and revolubly attached to the power cylinder within the casing, and means for supplying fluid under pressure to the casing, in combination with means for imparting intermittent rotation to the power cylinder and including a piston within the tail piece or pipe, means for con trolling admission of the actuating fluid to either side of said piston and rotative mechanism engaging the piston and the power cylinder. 21. In a drilling or boring machine or enand slidably mounted in said'casing and nonrotatably carrying a drill or bit at its forward end, a tail piece or pipe slidably ,and non-rotatably fitting the casing, and means for supplying fluid under pressure to the casing, in

gine, a casing, a power cylinder rotatively combination with means for imparting inter- I mittent rotation to the power cylinder and including a piston within the tail piece or pipe, means for controlling admission of the actuating fluid to either side of said piston and rotative mechanism engaging the piston and the powercylinder.

In witness whereof we have hereunto set our hands in the presence of two subscribing witnesses.

HENRY HELLMAN. LEWVIS CONDICT BAYLES.

Witnesses:

CnAs. OVENDAPE, RJ OVENDALE.

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