US309160A

US309160A - And bror f

Info

Publication number: US309160A
Authority: US
Publication date: 1884-12-09
Anticipated expiration: 1901-12-09

Description

(No Model.) 3 sheets-sheet 1.

H. 1:". PARSONS 8v B. F. BERGH.

1100K DRILLING MACHINE. No. 309,160.

Patented Dec. 9.,V 1884..

By #wir .dltarneys Y (No Model.) 3 Sheets-Sheet 2.

H. PARSONS 8v B. F. BERGH. ROCK DRILLNG MAGHINE.

No. 309,160. u Patented Deo. 9, 1884.

lll/lllll/ (No Model.) l v Y 3 Sheets-Sheet 3.

H. P. PARSONS 8v B. F. BERGH.

ROCK DRILLING MACHINE.

Patented Dee. 9, 1884.

INVENTORS;

WITNESSES- N PETERS. Phew Lnmgmphw. wmwgmu, 11C4 ilnrrnn @rares Parenti* Ormea.

HENRY FRANCIS PARSONS, OF JERSEY CITY, NEW JERSEY, AND BROR F. BERGH, OF NEV YORK, N. Y., ASSIGNORS, BY MESNE ASSIGNMENTS, TO

EDYARD J. N. STENT.

ROCK-DRILLING MACHINE.

.SPECIFICATION forming part of Letters Patent No. 309,160, dated December 9, 1884.

Application tiled May 24, 1883. (No model.)

Zh all whom it may concern:

Be it known that we, HENRY F. PARsoNs, of Jersey City, New Jersey, and BROR F. BERGI-I, of New York city, New York, have in` vented certain new and useful Improvementsiu took-Drilling Machines, of which the following is a specification.

O11 the 12th day of September, 1881, said Parsons and oneHugo Borchardt filed an application for a patent, which application was allowed on the 7th day of March, 1883. Said application shows and describes a hand rockdrill machine. On the 29th day of September, 1882, said Parsons led another application forimprovement upon said hand rock-drill machine.

The present application relates to improvements upon the rock-drill machines shown in said applications.

The first part of ourinvention relates to an improvement in mechanism by which power is obtained for causing the hammer to give its blow; and it consists in the combination, with a rubber spring, of mechanism which compresses the rubber when the hammer is raised, and which communicates the expansive power of the rubber to the hammer when the latter is released.

rFile second part of our invention relates to the mechanism by which the drill-holder is raised; and it consists in the combination, with such drill-holder, of a lever which receives its motion from the hammer-arm, substantially in the manner hereinafter pointed out.

rlhe third part ol" our invention relates to the mechanism by which the drill is revolved and directed; and it consists in the combination, with the mechanism for revolving the drill, of mechanism which insures its retention in the revolved position, and prevents it from being revolved back again on its return to the bottom of the bore-hole.

The fourth part of our invention relates to an improvement in mechanism by which the machine is fed forward on its supports as the drilling` proceeds; and it consists inthecombination, with a rack or equivalent device attached to the supports, of a pinion or equivavthe drill-holder or plunger.

lent device attached to the machine, the motion of which pinion is governed by mechanism which is in turn set in motion by the action of the drill-rod upon astop whenever the drill has advanced to a certain point relatively to the other parts of the machine. l

The iifth part of our invention relates to the manner of securing the drill-machine to a column whenever one is used.

The sixth part of our invention relates to an improvement in the manner of securing the drill to the drill-holder or plunger; and it consists in the construction of a socket with removable lining, so that by simply changing the lining ofthe socket to one having a proper interior configuration the socket may be adapted to receive drill-rods in various forms in section.

XVe will now proceed to describe in detail the specific form of machine in which we prefer to embody our inventions, though we do not limit ourselves to the special construction shown.

Figure l represents a front view of our machine as mounted upon a column in the shaft of a mine. 'Fig 2 represents a side view of the same, with portions of the drill and guide-rods removed, the hammer being down. Fig. 3 represents a top view of the same, with the hammer-head and a portion of the hammer-arm removed, the parts being in the position they occupy when the hammer is raised. Fig. et represents a side view of the thing shown in Fig. 3, but with portions of the parts removed and other portions in section, to display the mode of operation. Fig. 5 represents in detail a front view of a portion of the parts employed in controlling the motion of the pinion by which the machine is fed forward on the rack. Figs. 6 and 7 represent, respectively, a sectional plan view and a sectional side view of the mechanism by which the drill-rod is attached to Fig. 8 represents a sectional plan view through the line 8 8, Fig. 2, showing the arrangement of the ratchet and pawl for governing the rotation of the drill-holder. Fig. 9 represents averti- Cal section showing the arrangement by which e 'eoalee 4ni@ Striking-piu is secured to the drin-holder or plunger. Fig. l() represents in detail the relative arrangement of the pawl of', and its two arms and pivot, and the wheels 0 and p with which it engages, as they appear when looking from the rear of the machine.

a is the drill.

b is the drill-holder or plunger. Y

c is the frame upon which the operative parts are mounted. In the forward part of this frame is formed the barrel which serves to hold and direct the plunger, and from this barrel the frame extends backward in two divisions, which receive parts of the machine between them, and converge toward each oth-- er at the rear, where they unite to form the bearing of the hammer-arm.

d is the hammer arm or helve, which bears the head d, and is pivoted to the rear end of the frame at c. Attached to this helve is an arm, c, which is acted upon by cams, similar to those described in the applications already referred to, which cams receive their motion from the levers ff', as described in said applications.

g is a lever pivoted intermediate its two ends to the frame at g. One end of this lever g is connected with the helve of the hammer at a point in the rear of the pivot e by the link h, which is pivoted bothto the lever g and the helve cl of the hammer, so as to permit of the requisite motions of the two. rlhe lever f/ is forked at its forward end, so as to partially encircle the plunger b, as shown at g", Figs. 3 and 4, below the collar b', which is attached to the plunger, and with which the lever g engages, so as to lift the plunger.

t is a rod which passes through the lever g, and to which it is secured by a set-screw, as shown. The rod t' projects downwardly below Vsaid lever until it terminates in the head fi, which is made to reciprocate within the inclosure or box j, which box is open at the lower end and closed at the top, save where the rod t' passes into it, and which is attached to the frame c. X'Vithin this box is placed around the rod t' an annular collar of rubber, t, which is held between the top of the box j and the head i of the rod 7c k are the guidc-rods ofthe machine,whieh are preferably rectangular, and which are notched into the frame c ot' the machine on either side of the plunger, as shown in Fig. 3. These guide-rods are joined together at top and bottom by the piece c/at'the top and the piece c at the bottom, which are each bowed forward sufficiently to permit the drill, drillholder, and hammer to operate between the guide-rods. rlhe piece 0"is also attached only to the outerportions of the guide-rods, as shown in Fig. 3, and does not surround the guide-rods, so that the frame c may slide up past the piece c on the guide-rods, and the operative parts of the machine be thus readily placed upon or detached from the supports when in position. To one of these guide-rods is attached the rack Z; or the rack maybe formed directly on the face ofthe guide-rod, as shown in Fig. 3. m is apinion mounted fast upon the shaft n..

rlhe object of the rack Z and pinion m is to provide a traveling connection between the frame supporting the hammer and the standards of the machines, and other mechanism might be employed for the same, which I should consider the equivalent of the particular mechanism shown. This shaft n extends across between the branches of the frame c, and upon it is also mounted loosely the wheel o. In the periphery of this wheel is cut one notch, o', and on its face are provided serra` tions inclined on one side and vertical on the other, which engage with corresponding serrations in the wheel p, as'shown in Figs. 5 and 10.

p is a wheel also mounted upon the shaft n and fast to said shaft, which wheel is provided upon its periphery with a series ot' notches corresponding in width and depth with the notch o.

q is a rod which is pivoted at one end to the face ofthe wheel o, near its periphery, and which projects thence upwardly loosely through a hole made in the lever g to receive it, as shown in Fig. 4. Upon its end,whieh projects above the lever, there is screwed a nut, so that it is prevented from passing down through the lever g by reason of its passing loosely through the hole. v

r is a pawl which is pivoted intermediate its two ends, and provided with a downwardly-extending lip on one end. The two arms of this pawl, r and r, are not opposite each other, but are arranged along its pivot, as shown in Figs. 3 and l0, so that the arm r is in the line of travel of the shoulder b on the plunger, while the arm r is arranged so that the downwardly-extending lip at its extremity rests upon the peripheries of the wheels o and p, upon which it is pressed by the spring 1", so that when these wheels have revolved so as to bring the notch o and one of the notches in the wheel p under the lip upon the pawl r, said lip will be yforced to engage with such notches by the -spring r', as shown in Fig. 4. rllhc opposite end of the pawl r is in such position that when the plunger or drillholder has passed beyond a certain point, the shoul der b situated upon it will engage with the pawl and lift the lip upon its opposite end out of the notches already referred to.

Upon the side of the wheel p next the frame c the wheel is beveled off, so as to present a male conical frictioirsurface, which engages with a female conical friction-surface turned upon the inner side of the frame c, as shown in Fig. 5. Between these conical surfaces leather may be introduced to improve the frictional connection.

Cast with the wheel o on the opposite side from the wheel p is a sleeve, a', which extends concentrically around the shaft u from the wheel o, nearly tothe inner side of the IOD IIO

t'ranie c, sullicient space being lett between the end of the sleeve a and the frame cto admit of sufficient longitudinal motion ot' the wheel o away from the wheel p, for the disenA gagement ot' the serrations shown upon the opposing faces of the two wheels. y

s is aspiral spring, situated upon the sleeve n', and attached to that sleeve and the inner side of the frame c in such manner as to constantly tend to revolve that sleeve in the direction of the arrow, Fig. et, and also to tend to press the wheel p toward the frame c next it, whereby the conical frictional surfaces already referred to are held in contact, and the serrations on the two wheels are held in engagement by a yielding pressure.

ai is a cra-nk attached to the shalt n, by which the pinion m may be turned by hand, s as to raise the machine on the rack Z when it is desired to do so. r r

9 is a rod which may be revolved and retraeted` by t-he head 10. Vhen this rod has been retracted and revolved half round, the V-shaped lip (shown in Fig. 3) on the face oll the head next the i'rume will hold the rod in the retracted position until it is turned round, so that the lipffalls into the groove provided for it. This rod i) is provided with a groove at 7 into which the flange o" of the wheel o lits, so that when the rod 9 is retracted the wheel o will be drawn away from this wheel p against the pressure ot' the spring s until the serrations between the wheels 0 and p are disengaged. rlhe rod 9 is also provided with a notch on one side, which, when the V-shaped lip on the inner side of the head l() rests in the groove on the frame, as shown in Fig. 3, is directly below the spring fr'. ln this position of the rod S) the rod does not touch the spring i" by reason ot' the notch referred to; but when the rod i) is turned so as to bring the unnotched surl'ace ot' the rod 9 under the spring i", the position o'l'l the parts is such that the spring is raised and rests upon the rod 9.

- The raising oll the spring raises the lipped end ofthe pawl r, to which the spring is attached, out ol" the notches on the wheels o and p, so that the lip on the pawl is held disengaged from the notches on the wheels so long as the rod i) remains in the revolved position. It will thus be seen that by a simple rotation of the head 10 the rod i) is at the saine time retracted and revolved, and sinniltaneously the serrations on the wheels are disengaged, and the lip on the pawl is disengaged trom the notches on the wheels. This throws the parts out of gear, so that the operator may, by turning the crank ai, adjust the niachine at any height on the rack Z.

Upon the periphery ot' the wheel o is placed the projection z, Fig. AVt, which comes in contact with the rod Sl, and acts as a stop to regu1 late the extent to which the wheel o can be revolved by the spring s.

o c is a column ot' ordinary construction. Upon this column is mounted a split sleeve or strap, e, having ears w w projecting downward] y on each side ofthe split.

l is a rod secured to the piece c', which piece c is bowed outwardly around the path ofthe hammer, and extends from the guide-rod 7c to the guide-rod 7.a at their tops.

ln the front ofthe rod l is cut a longitudinal T- groove.

3 is a T-bolt the head of which is within the T- groove of the bar 1, and the sha-nk of which projects outwardly through holes drilled in the ears zu i0.

Upon the shank ofthe bolt 3 are also arranged two disks, 4- 5, having their adjacent faces serrated to correspond with each other, as shown in Fig. 2, one disk beingattached to the guide-rod 1, the other to the ear nl of the sleeve on the column..

6 is a setfnnt litted onto a screw-thread on the shank of the bolt 3 in such manner that when the set-nut is loosened the T- bolt 31nay slide freely in the groove ofthe rod 1, :and the serrations between the disks 4 and 5 may disengage, and the split sleeve t may slide freely on the column n; but when the set-nut 6 is tightened it brings together the ears w and w, which causes the sleeve c to clamp the column o, and also causes the head of the Tbolt 3 to clamp the groove ofthe bar 1, and also causes the serrations of the disks l and 5 to engage with each other, so that by a simple tightening of the set-nut the connection between the eolkunin and the bar 41, attached to the machine, which was previously a universal and sliding joint, is made rigid in anyposition in which it is desired to hold the machine.

The construction ofthe socket for receiving the driltrod is as follows: A round hole is bored into the lower end ot the plunger, leaving the downwardly -projecting shell ll 12, through the sides ot' which the longitudinal slot is cut, as shown in Fig. G. The roof or upper extremity of this hole in the plunger is beveled oli' and formed into an incline, as indicated-at 13 18, Fig. 7, which is supposed to be a longitudinal section Ythrough y y, Fig. G. Upon the outer surface ot' the shell 11 12 a screw-thread is cut.

141-1 is a metallic lining for the shell l1 12. which lining is made in two parts. Each part contains a semicircular portion, 15, iittingl within the shell, and extending not quite halt way round the shell, and provided on its back with a longitudinal rib, 16, which tits within a longitudinal groove in the shell, and pre* vents any rotation between the shell and its lining. The lining is slightly longer than the shell, and is beveled oit at each end, the upper bevel being termed to lit the bevel 13 13 on the plunger, andthe lower bevel being formed to lit the bevel 17 17, formed at the lower end of the serew-thread on the n ut 18. The nut 1S is made to screw onto the exterior of the shell 11 12. TVhen the lining 15 is in place, as the nnt 18 is tightened the inclined surfaces on each end of the lining are forced against the inclines on the IOO IIO

vof the drill-rod are the lining 15, which, be-

ing removable from the other parts and being light and easily adjusted, may be providedin various sets suited to various forms of drillrods. The operatorl may thus use a drill-rod formed of any of the ordinary-shaped steel bars from which drills are made without the necessity of turning off the end of the rod to iit the socket of the machine. To prevent the nut 18 becoming loose in operation, the locking device shown at 19 or any other suitable locking device may be employed. 20 is a spring which tends continually to force the plunger downward with a yielding pressure.

The construction of the mechanism by which the rotation of the plunger is regulated is as follows: 21 is a ratchet-wheel mounted upon the plunger, and provided with an interior rib or ribs,which engage with a spiral groove or grooves on the exterior of the plunger, in the manner described in the patent granted to said Parsons, dated October 25, 1881, and numbered 248,787. 22 is a spring-pawl operating in connection with said ratchet-wheel, as described in said patent. 23 is another ratchet-wheel, (not shown in said patent,) and provided with a spring-pawl, 24.-, of the same` character as said first-named Vratchet-wheel and pawl. rlhis ratchet-wheel 23, however, differs from the ratchet-wheel2lin tl1at its interior rib engages with a straight longitudinal groove, 32, on the plunger, so that while a longitudinal movement of the plunger compels a rotation between the plunger and the ratchet-wheel 21 through the medium of the spiral grooves, all rotation between the wheel 23 and the plunger under any circumstances is prevented by the engagement of the straight longitudinal groove with the rib on the interior of the ratchet-wheel 23. A e

The following is an arrangement for attaching the striking-pin to the drill-holder orplunger, which we have found useful, since it prevents the striking-pin from becoming so wedged fast to the other parts that it is difficult of removal, which has been the case with other arrangements in use. Our arrangement is shown in detail in Fig. 9, which is a longitudinal section through the center of the nut 30. b represents the upper portion of the drillholder. A29 is the striking-pin, which is of about the same size as the drill-holder in diameter, and which is held on top of the drillholder by the nut 30. rlhe nut 30 is attached to the drill-holder by the screw-thread formed around its upper portion, as shown. Ashoultop of the nut. To attach the striking-pin to the drill-holder,it is only necessary to unscrew the nut 30, place the striking-pin 29 in the position within it, so that the top of the strikingpin projects through the opening at the top of the nut, and then to screw the nut down upon the drill-holder until the lower portion of the striking-pin comes in contact with the top of the drill-holder.

rlhe operation of the machine is as follows: The machine is first placed in position, which may be as shown in Figjl, or may be suchY that the drill is directed in any other direction which may be required; or the machine may be supported on legs, such as are shown in the applications already referred to. The drill being placed in position in its socket on the end of the plunger, the crank n2 is turned until the point of the drill rests against the rock. Hand-power is then applied to the levers ff, which are attached to the casting bearing the cams, as described in the applications alrcadyreferred to. The oscillating niotion given to these cams is communicated to the hammer, which is thus caused to oscillate around the pivot c. Vhen the hammer' is raised, the rear end of the lever g is depressed through the link h, and the forward end is raised. This action forces the pin t upward, and strongly compresses the rubber spring t. At the same time the upward motion of the forward end of the lever g causes its forked end to engage with the collar b on the drill-holder or plunger, and the drill is thus raised at the same time that the hammer is raised, the motion of the two being in unison. When, by the action of the cams, the hammer is released so as to fall, the spring t quickly reacts upon the head of the rod 1'-, and forces the forward end of the lever gdownward. A quick sharp motion is thus conveyed to the hammer in a downward direction, and at the same time the forked forward end of the lever g descends until it ceases to engage with the collar b upon the plunger, and the plunger or drill-holder is forced forward by the spring 2O until it is supported solely by the point of the drill resting upon the rock.

At Fig. 2 it will be noticed that the forked forward end of the lever g has descended lower than the position in which the collar b is held when the drill rests upon the rock, and this is necessary to prevent the blow of the hammer coming upon the end of the lever g, which would be the case if it remained in contact with the collar b when the blow was struck. ln'the manner described, between each blow of the hammer the drill-holder is raised by the lever g in unison with the motion of the hammer, and is allowed to descend until it rests upon the rock just before the hammer delivers its blow, Awhich is a quick sharp blow by reason of the efficient reaction of the spring t, which may be used in connection with a steel spring or not, as desired.

The operation of the mechanism which re- IOO IIO

volves the drill is as follows: As the plunger is raised by the lever g in the manner de scribed, (the ratchet-wheel 2l being held by the pawl 22,) the lips or ribs of the interior of the ratchet-wheel 21, which engage with the spiral grooves on the exterior of the plunger, compel the latter to revolve a certain distance as it is raised. Vhen the plunger begins to descend, its tendency is in turn t-o revolve the ratchet-wheel, and this is permitted on the downward stroke by the pawl 22, which holds the ratchet-wheel only from revolving in one direction. Thus in the machine there 1s nothing to cause the plunger to revolve back again on its downward stroke; but it has been found that the contact of the point of the drill with the rock, acting as a sort of a cam upon the lower end of the drill, has a tendency to returnthe drill to the same position which it previously occupied at the bottom of the borehole, and this has a tendency to revolve the plunger back again in accomplishing this result. To obviate this, the ratchet-wheel 23 is also placed upon the plunger, and is provided with a spring-pawl similar to the other ratchet-wheel. This second ratchet-wh eel has a lip on its interior surface, which engages with a straight longitudinal groove upon the exterior of the plunger. This second ratchetwheel is free to revolve in the direction in which the plunger is revolved during its upward stroke, but is held by the pawl from revolving in the opposite direction, and since there can be no revolution of the ratchetwheel around the plunger, the plunger is compelled,lby the engagement of the lip on the interior of the ratchet-wheel with the groove on the exterior ofthe plunger, to descend in a straight line without rotation. It is thus insured that the drill should always cut the rock in a different position from that where it previously rested upon it, which new position is determined by the extent to which the plunger is revolved by the combination of the spiral grooves and the ratchet first named.

The operation of the mechanism for feeding the machine forward as the drilling proceeds is as follows: Generally the rod q will occupy the position shown in Fig. 2, so that while the end of the lever g is below its highest position the rod q will project above it, and will not be acted upon by the motions of the lever g; but as the drill enters farther and farther into the rock the time will come when the shoulder b on the plunger will strike against the short arm r of the pawl lr and raisethe lip upon the opposite end of said pawl out of the notches in the wheels o and p. As soon as this is effected the wheel o .is free to revolve around the shaft a in the direct-ion of the arrow, Fig. 4, and is compelled to do so by the action of the spiral spring s until it is revolved so far that the projection a on its periphery comes in contact with the rod 9. The rotation of the wheel o in this direction independently of the wheel p is permitted by the form of the serrations bctween the two wheels, as shown in Fig. 57 and during this motion of the wheel o, and while the lip of the pawl r is disengaged from the notches in the wheels o and p, the wheel p is prevented from revolving by the engagement of its conical friction-surface with that upon ,the frame c, as shown in Fig. 5, said surfaces being pressed together by the end pressure of the spring s. The wheel p, and consequently the shaft a, to which it is fast, are thus held from revolving during the rotation of the wheel o in the direction of the arrow, the eX- t-ent of which rotation is regulated by the p0- sition of the stop z. This stop prevents the further rotation of the wheel o in the direction of the arrow. The rotation of the wheel o in the direction of the arrow, as described, carries downward the rod q, which is pivoted to it, as already described, and the parts remain in this condition until the lever g, moving upward again, raises the rodi q to the position which it previously occupied. This upward motion, however, of the rod g compels the wheel o to revolve backward to the position from which it started. In doing so, by reason of the form of the serrations between the wheels o and p, it carries with it the wheel p, which, being fast to the shaft n, compels that shaft and the pinion m to revolve in unison with the wheel 0. The rotation of the pinion m, however, causes the latter to travel upon the rack l, and the machine is fed forward on the rack a distance which is dependent upon the extent of rotation of the pinion m. In the meantime the contact between the short arm of the pawl r and the shoulder on the plunger is broken, and the spring r' compels the lip on the pawl i to return into the notches in the periphery of the wheels o and p as soon as the wheel 0 is revolved back to the position from which it started. The position of the parts shown in Fig. 5 is thus held positively until the drill has again progressed so far that the shoulder b on theplunger again on its downward stroke raises the lip upon the pawl fr out of the notches of the wheels o and p, when the operation just described will be repeated. AIn this manner the position of the machine is held positively until, at determined intervals, it is fed forward, causing the position of t-he machine to keep pace with the travel of the drill. Vhenever it is desired to remove the drill entirely from the hole for the purpose of renewing it or changing its posit-ion, the operation is simply to retract and turn the rod 9, as already described, and then, by turning the crank n?, to run the pinion to any desired position in the rack Z.

It will be observed that the pinion fm and rack Z act as the mechanism to support and feed the machine on the guides 7c k; that the mechanism shown Vin Fig. 5 acts to alternately lock and actuate the feeding mechanism; that the said locking and actuating mechanism is unlocked by the travel of the drill-holder, and that the power for driving the feed-actu- ICO ating mechanism forward is received from the l rod, the drill-holder, and the hammer of a reciprocating hand-levers.

We claim- 1. rlhe combination, with the drill-holder b and hammer-arm cZ of a drill-machine, of the lever g, having one end connected with the hammer-arm and its other engaging the drillholder, the inclosnre y', attached to the drillframe, and the spring t, connected to said lever, substantially as described.

2. The combination, in a rock-drill, of the frame c, the feeding mechanism, and the drill-holder with a lever pivoted to the frame, and constructed and arranged f to both act directly on the drill-holder and feed the frame toward the rock, substantially as described.

3. In a drill-machine, the combination, substantially as described, with the pivoted vibrating hammer-arm d, of lever g, the link h, connecting said lever and hammer-arm, and a spring attached to said lever, for the purpose set forth.

Ll. In combination, the framec, the drillholder b, the vibrating lever g, pivoted to the frame and operating directly on the drillholder, and connected with the vibrating hammer-arm (Z, whereby the raising of the hammer causes the drill to rise, and the release of the hammer causes the drill-holder to be said pawl and said pinion, constructed to revolve said pinion a certain distance when the drill has advanced far enough to bring said pawl into action.

6. In combination with the frame of a rockdrilling machine, the rack Z, the drill-holder b, sliding on said frame, the pawl 1', and the wheel o, both supported thereon, the springs s, for actuating said wheel when released by said pawl, the pinion m, operating on said rack and having the wheel p connected therewith, connecting mechanism between said wheels, whereby rotation of the wheel o in one direction may be effected while the wheel p is at rest, while rotation of the wheel o in the opposite direction carries the wheel p with it, and mechanism, substantially as described, connecting said wheel o with the source of power.

7. In combination, the hammer, the lever g, pivoted to the frame of the drill and operated by the motion of said hammer, the rack Z, connected to the guide-rod of said frame, the pinion m, operating on said rack, the wheel 0, connected with said pinion, and mechanism, substantially as described, connecting said wheel 0 with said lever g, whereby said pinion is operated by the motion of the hammer, as setforth.

S. The combination of the frame, the guiderock-drilling machine,the rack Z, supported on the guide-rod, the pinion m, operating on said rack, thc pawl r, constructed to be operated by the drill-holder and to regulate the motion ot' the pinion, with the friction mechanism, substantially as described, constructed to prevent the mechanism.operating said pinion from overrunning when released by said pawl.

9. In combination with the drill and hammer-actuating mechanism, the frame c, constructed in two branches, both ends of each branch being firmly united to the other branch, thef'bearings for the drill-holder being formed at one point of unison, and the bearings for the hammer-operating mechanism being formed at or near the other point of unison, and space being provided between the two branches to t accoln modate the mechanism intermediate the drill-holder and the bearings for the hammer.

10. In combination, the grooved bar l, the bolt 3, having its head tting in the groove in the bar, the sleeve c, provided with the ears w w', and the nut 6, whereby the joint between the drill-machine and a column may be tightened or loosened and the machine raised or lowered, substantially as described.

1l. The combination, in a drilling-machine, of the guide It for the frame thereof, along which said frame travels, the rack Z, connected with said guide, the pinion m, operating on said rack, the ratchet-wheel p, connected with said pinion, the drill-holder sliding in said frame, and the lever g, fulcrumed on the same, constructed to raise the drillholder and move the frame in opposite directions simultaneouslythrough mechanism, substantially Vas described, interposed between said lever g and said wheel p.

12. The combination, in a drill-coupling, of the drill and the drill-holder, said holder having a socket inclinedjn ward at the top with a divided lining having its top and bottom ends tapered inward, and anut fitting athread on the outside ofthe drill-holder, and provided with an inclined iiange, substantially as described.

13. The combination, in a drilling-machine, of a hammer, the vibrating-lever pivoted to the frame and connected to the hammer and to the drill-holder, and a spring constructed and arranged to force forward the drill and assist in giving the hammerits forward stroke, substantially as shown and described.

14. In a drillmachine, the combination, with feeding mechanism, as the pinion m and rack Z, and mechanism, as the wheel o and the clutch connected therewith, and the pawl r, connected with the pinion m, for controlling the motion of the same, of the rod 9, moving in the frame; and constructed to engage' with and move said wheel o and pawlr,where by said feeding mechanism may be disconnected and operated by the hand, substantially as described.

15. In a drilling-machine, and in combina- IOO IIO

tion with the supports and frame thereof, a drill-holder or plunger, as b, working in said frame, an oscillating handle, as f, pivoted to the frame, a holding1 device, as the rack Z, connected with said supports, and feeding mechanism, as the pinion m, operating on said rack, locking and actuating mechanism, substantially as described, connected with said feeding mechanism, controlled by the motion of and combined with said drill-holder, whereby said locking and actuating mechanism is unlocked by motion derived from the travel of the drillholder, and mechanism, substantially as described, connecting said locking and actuating mechanism with said hand-lever, constructed to give the forward motion of the feeding mechanism from the motion of the hand-lever, substantially as shown and set forth.

16. In combination, the drill-holder b, the nut 30, having flange b, engaging with the lever g and the strikingpin 29, said strikingpin being provided with ashoulder which engages with the corresponding flange on the nut 30, whereby said nut perfornis the double function of holding the pin and engaging with the lever g, substantially as described.

17. In a rock-drilling machine, and in combination with the frame thereof and the guiderod for the same, the rack Z, connected with said guide-rod, the pinion m, operating in connection with said rack, the vibrating lever g, pivoted on the frame, and mechanism, sub stantially as described, between said lever g and pinion nl, the drill-holder, and a device, substantially as described, communicating with the drillfholder, and constructed to automatically throw out of gear the connection between the lever g and pinion m, as set forth.

1S. In a rock-drilling machine, and in combination with the frame thereof and the guiderods for the same, the drill holder working in the frame, the vibrating lever y, pivoted to the frame and constructed to raise the drillholder as the hammer is raised, the rack Z,

said pinion, whereby the motion from said lever is communicated to said pinion to Vfeed the machine, as set forth.

19. In a roclcdrilling machine, and in combination with the frame thereof and the guiderod for the same, the drillholder sliding in said frame, the hand-lever and the vibratinglever g working thereon for raising the drill, and a cani operated by said hand-lever interposed between said handlever and the lever y, the rack Z, connected with the support for the frame, the pinion m, operating in connection with said lever r/ and rack Z, whereby said pinion is actua-ted through said lever g by the power applied tothe hand-lever, as set forth.

20. In a rock-drilling machine, and in combination with the frame and guide thereof,the drill-holder sliding in said frame, the lever g, working thereon, the rack Z, connected to the guide, the pinion m, working on said rack, and the lifter moving with said drill holder, whereby the connection between said pinion and said lever g is made when the drill has advanced to the point where further feed is required, but broken when the feed has been accomplished, as set forth.

2l. Ina rock-drilling machine, and in combination with the frame and the guide thereof, the drill-holder sliding in said frame, the lever y, working thereon, the rack Z, connected to the guide, and pinion m, working on said rack, the lifter moving with the drill-holder, and the mechanism, substantially as described, connecting said lever with said pinion, and controlled by the position ofthe drill-holder, whereby the connection between` the pinion and leverg is made when the drill has ad vanced to a predetermined point and broken when the feed has been accomplished, as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

HENRY FRANCIS PARSONS. BROR F. BERGH.

XVitnesses:

L'IvlNGs'roN Girronn, DANIEL I-I. DRIscoLL.