US1233477A - Drilling-machine. - Google Patents

Description

Patented July 17, 191'?.

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C. A. HULTQUIST. lDRILLING MACHINE.

DRILLING-MACHIN E.

Specification of Letters Patent.

Patented July 17, 1917.

Application filed January 22, 1917. Serial No. 143,648.

To all whom it may concern:

Be it known thatl, CHARLES A. Huur-A especially in some respects to that type of' drilling machine in which a stream of water is employed to minimize the production of dust and to flush the borings from the hole being drilled.

An object of this invention is to prevent the pinching or cutting off of the air and water pipe..

Another object is to make provision for the utilization of exhaust air from the cylinder for normally accelerating the flow of water, carrying away the borings, and for the utilization at times of live air for acceleration of the flow of the water for cleaning out the duct and grooves of the drill steel when said grooves become plugged up with clay or other tenacious material.

Another object is to effect the foregoing by a comparatively simple construction and one that is reliable in operation.

Further objects and advantages will appear in the subjoined detail description.

The accompanying drawings illustrate one embodiment of the invention:

Figure 1 is a side elevation of a stopin machine embodying the invention.

Fig. 2 is an enlarged vertical mid section of the upper portion of the machine shown in Fig. 1.

Fig. 3 is an inverted plan view from line indicated by m34-w3, Fig. 2.

Fig. 4 is a plan section on line indicated by :eL-m4, Fig. 2.

Fig. 5 is an inverted plan section on line indicatedby @v5- m5, Fig. 2. I

Fig..6 is a plan section on line indicated by sa-m6, i'Fig. 2.

Fig. 7 is an inverted plan viewon line indicated by 7-7, Fig. 2.

Figs. 8, 9 and 10 are plan sections on lines indicated by wfg-ac, 90g-m9, and x10-w10, re-

spectively.

Fig. 11 is a sectional plan view on the irregular line indicated by :vH-m, Fig. 2.

Fig. 12 is a sectional detail on line indicated by aan- 0012, Fig. 2.

Fig. 13 is a perspective view of the valve shown in Figs'. 2, 11 and 12.

In the drawings the inventionis embodied in a stoping machine, but it is understood that certain features of the invention hereinafter described are applicable to drilling machines other than stoping machines. In Fig. 1` the feed cylinder of a stoping machine is indicated at 1 and the feed piston at 2 and next to the-feed cylinder is an air chest 3 which may be of any well known yco'nstruction and which contains a recprocative valve 4 of any well known or desired construction. Dowel pins 5 may be employed, if desired, to prevent relative rotation of the cylinder 1 and air chest 3.

Next to the air chest 3 is a water chest 6 and, if desired, dowel pins 7 may be employed as shown to prevent relative rotation between the air chest and water chest.

Next to the water chest 6 is a cylinder 8 containing a plunger or hammer 9 adapted to Work therein and the cylinder 8 also contains an anvil 10 having a reduced head 11 adapted to be struck by the hammer 9 in a mannery well understood in the art.

It is readily understood that it is preferable to extend the air and water tube of a inachinelof this description a short distance -into the air and Water duct of the drill steel so as to minimize leakage of the air and water around the head of the drill steel when the drilling machine is in operation and such construction is not new; but

' when the air and water tube is thus inserted in the drill steel, it frequently occurs that after the machine has been in use for some time the drill steel wears away the bore of .the chuck. in such manner that the drill steel is not always perfectly alined with the air and water tube but is disposed at an angle thereto. chuck the head of the drill steel is sometimes so` eccentric to the axis of the anvil that the discharge end of the air and water tube is pinched or broken 0H; and it is to After such wearing of the overcome these diiiiculties that some of the principal features of the invention are provided and these features will now be described.

The anvil 10 vis provided in its drill-steel engaging end with a guide way in the form of a recess 12 of any suitable shape. In the drawings the recess 12 is circular but it is understood that it may be hexagonal or any other shape. At the bottom of the recess' 12 is an annular groove 13 around'a boss 14 which engages the head 15 of a drill steel 16,` said head being of appropriate shape to fit the recess 12`and to be guided by the sides of the recess so as to maintain the head end of the drill steel, that receives the blows from the anvil, concentric with said anvil and its boss 14.

The cylinder 8 is provided internally with 7 end of said tube projecting beyond the face of the boss 14 into the recess 12 and into the bore or duct 22 of the drill steel 16. In the 'drawings thedepth of the recess 12 is the same as the distance thatthe tube 2l projects beyond the face of the boss 14 in' consequence of which the outer end of the tube is Hush with the outer face of the anvil 10. v

The cylinder 8 is provided with air inlet ports 23, 24 and with air valvel ports '25, .b

26, said ports 23 to 26 inclusive extending through the water chest 6 andinto the air chest 3 and communicating with the valve chamber 27 of said air chest.

The valve chamber 27 is provided with an air intake or intakes 28 and with exhaust ports 29, 30. One of the exhaust ports 29 is provided with a plug 31 and is connected by a duct-32 with a valve chamber 33 having a rotary valve 34 adapted to be turned by a suitable handle 35, said valve chamber 33 bein formed in the water chest 6. The valve c amber 33 communicates by a duct 36 with a nozzle chamber 37 which is provided with a water nozzle 38 projecting into vthe intake end of the air and water tube 21, the portion of said nozzle within said tube being of less outside diameter than the inside diameter oii the tube 21 so that air vadmitted through the duct 36 to the nozzle chamber -37 will discharge around the nozzle 38 into the tube 21 to accelerate the flow of water issuing from the nozzle 38.

The rear end of the nozzle 38 communicates with a water duct 39 which receives its supply of water through a water supply pipe 40 provided with a valve 41.

The valve 34 is provided with a recess 42 forming a spring chamber containing a coil spring 43,' one end of which pressesr against the bottom of the valve chamber' 33 and the other end against the valve 70 34 so as to hold said valve tight against the inner face of a bushing 44 that vis screw-threaded into the outer end of the valve chamber 33, the shaft 45 of the valve projecting through said bushing. The valve j recess 42 is provided with a port 46 adapted to register with the duct 32 when the valve 34 is turned into appropriate position for that purpose.v The valve recess 42 is also provided with a port 47 adapted to register with a duct 48 when the valve 34 is turned to the appropriate position, the ports 46, 47 being at different points circumferentially of the lvalve so that only one 'of said ports at a time may be turned into open positlon and so that both may be closed when desired.

The duct 48 communicates with one of the air intakes 28 so that when desired live air or air under comparatively high pressure may be inducted intol the tube 21 to cause greater acceleration of the flow of the water in the tube than 4can be e'ected by exhaust air from the cylinder 8.

The nozzle 38 is provided with an annular 95 flange 49 which is seated in the bottom of a recess 50 of the Water chest 6. Seated against the fiange 49 is a washer 51 which is brazed or otherwise firmly fixed to the inner end of the tube 21 so as .to form an annular ange on said tube. The ange 51 is tightly held against the flange 49 by a ushing 52A screw-threaded into the recess 50 and against the flange 51, the tube 21 extending through said bushing.

Air is admitted to the valve chamber 27 through the air intake 28 which extends into a throttle device 53 of any Well known or desired construction, the; throttle handle being indicated at 54 and said throttle controlling the flow of air from the air supply hose 58 to the machine in a manner well understood in the art.

Ears or lugs 55, 56 on the cylinders 1 and 8 respectively and bolts 52'V hold the cylinders, throttle device 53, and airV and water chests 3, 6 in assembled position.

In practice, assuming that the hose 58 is connected with a suitable compressed air supply, not shown, and that the water pipe 40 is connected with a water supply, the operator, to drill, will operate the throttle 11andle 54 to admit compressed air through the duct 28 into the valve chamber 27. Assuming, for example, that the parts are in the position shown in Fig. 2, the air thus admitted will force the valve 4 from the position shown toward the opposite end of the valve chamber so as to admit air through the port 23 into the cylinder 8 to force the hammer-130 mesma 9 on its inor idle stroke. When the hammer moves suiiciently far to uncover the port 26, air will liow through said port into the valve chamber 27 to force the'valve 4 into the position shown in Fig. 2 to admit air through the port 24 soas-to force the hammer 9 on its out or working stroke, and said hammer will strike the anvil 10 so as to deliver a blow to the drill steel 16 in 0rder to cut the material engaged by the drill steel. Owing to the head 15 resting in and beingv guided by the recess 12, it is clear that the duct 22 of the drill steel will always be axially alined with the tube 21 so that the end of the tube 21 projecting into the duct A 22 will not be injured by the drill steel striking it, 'a's often occurs in. devices not provided with this feature of my invention.

The valve 4 and hammer 9 continue to reciprocate in the manner above described so as to deliver a succession of blows to the anvil 10.

To minimize the production of dust and to wash away the borings created by the drilling steel in the cutting operation, under normal working conditions, the operator will turn the handle 35 to bring the port 46 into registration with the duct 32 so that exhaust air will flow from the valve chamber 27 through said duct and port into the recess 42, thence through the duct 36 and nozzle chamber 37 into the tube 21 to accelerate the motion of the stream of water iowing through said tube so as to wash away the borings or cuttings from the hole being drilled. Thus, normally, only the exhaust air from the cylinder is used to accelerate the flow of the water, but in some instances, especially when the drill steel is working in clayor other substances of like nature, it may be advisable to impel the water into the hole with great force so las to force the clay or other substance out oi' the hole and out of the grooves of the drill steel. To dothis the operator will turn the handle 35 so as to move the port 47 into reg. istration with the duct 48 so as to admit live air through said duct and port into the valve recess 42, thence through the duct 36 to the nozzle chamber 37 and thence to the tube 21 i to accelerate the flow of water in said tubeand practically blow the clay or other substance out of the hole and grooves of the drill steel so as to greatly facilitate the drilling operation.

I claim:

1. A drilling machine comprising a cylinder, a hammer reciprocating in said cylin-4 der, an anvil to receive blows from the hammer, said anvil having a recess, a drill steel having its head in the recess, a tube extending through the anvil and projecting into said recess, and a chuck in the cylinder for the drill steel.

2. A drilling machine comprising a cylmwill ' der, ananvil in the cylinder provided with a recess, a drill steel having itshead in the recess, there being a boss at the bottom of said recess, a hannner in the cylinder to v strike the anvil, a tube extending through 4. A drilling machine comprising a cylin-4 der, a hammer in the cylinder, a water chest.

having a recess, a nozzle having a flange in the recess, a tube extending through the hammer and provided with a flange engaging the flange of the nozzle, said nozzle projecting into said tube, means to supply water to the nozzle, and a bushing in the recess around the tube to hold the flanges in place.

5. A drilling machine comprismg a cylinder, a hammer in the cylinder, a watei' chest having a recess, a nozzle having a flange in the recess, a tube extending through the hammer and provided with a flange engag ing the flange of the nozzle, said nozzle proj ecting into said tube, means to supply water and said tube, and means to change the connections at will to supply either exhaust fluid or full pressure fluid to the tube.

7 A drilling machine comprising a cylinder, a hammer in the cylinder, a water chest at one end of said cylinder having a nozzle chamber, a tube extending through the hammer and fastened to the water chest, a nozzle projecting into said tube, a duct to carry water to said nozzle, an air chest having a valve chamber, intake and exhaust ports extending from the air chest to the cylinder,

' a valve in said valve chamber to control the intake and exhaust ports, an air intake communicating with the valve chamber, a second valve chamber, a duct extendingI from the second valve chamber to the nozzle chamber, an exhaust port for the first valve chamber, a duct leading from the last named exhaust port to the second valve chamber, a duct leading from the air intake to the second valve'chamber, and a valve in said to the nozzle, a bushing in the recess around lll@ Fai 1.233,4??

second valve chamber to control the ducts extending through the anvil and projecting leading thereto. beyond the drill-steel engaging face of sai 8. In a drillin machine provided with a anvil.

hammer, an anvi having a recess to receive Signed at Los Angeles, California, thisy 5 the hed ofllche drillhsteel, alnd ai Waterr tube 11th day of January, 1917.

exten 'ng t rough t e anvi an projecting into Said recess. g CHARLES A. HULTQUIST.

9. In a drilling machine provided with a Witnesses: hammer, an anvil' having means `to guide Gnonon I-I. Hime, 10 the head of a drill-steel, and a water` tube `A. F. SoHMmTBAUnR.

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