US2639895A - Self-propelled drilling machine - Google Patents

Description

y 1953 n. L. GALLO SELF-PROPELLED DRILLING MACHINE 4 Sheets-Sheet 1 Filed March 25, 1951 \IITJ...

Richard L Gal/0 INVENTOR.

9y I Emmi May 26, 1953 R. GALLO 3 SELF-PROPELLED DRILLI'NG MACHINE v Filed March 25, 1951 4 Sheets-Sheet 2 I88 Richard L. 607/0 =Ei [5 I INVENTOR.-

' I82 1 I80 BY W ff M m May 26, 1953 R GALLO 2,639,895

SELF-PROPELLED DRILLING MACHINE Filed March 25, 19 51 4 Sheets-Sheet 3 v IIIEEER II a May 26, 1953 R. L. GALLO I 2,639,895

. I SELF-PROPELLED DRILLING MACHINE Filed March 25, 1951 4 Sheets-Sheet 4 Fig. /4

Richard L. Gal/a 4 290 INVENTOR.

W W MW Patented May 26, 1953 iuusiriso iS-"TA'TFES PATENT OFFICE Richard L. Gallo, Maytown, 'Pa., assignor of onehalfto Charles Bitner, Milton Grove, Pa.

Application March: 23, 1951, Serial No.21'l,140

12 Claims. 11

This invention relates to new and useful ,improvements in drilling machines, andmore particularly -to self-propelled drilling .machines especially well adapted for use in quarries.

The primary object of this. inventifln is to provide means whereby holes may bedrilled at various verticaland horizontal inclinations and at various heights.

Another important object .of the present inventionis to enable the operator of the machine to forcibly advance thedrill irrespective of the angle of drilling.

.A vfurther object of theHpresent invention is to enable the operator to control the drilling from various remote positions for maximum safety whenidrilling intothabreastof a quarry, and to permit the operator .to view the drilling operation from a position of vantage.

Still other important objects of the present invention are toprovidea machine of this character whichmaybeeasily moved toaposition of use, and which will be exceptionally flexible in use .ford-rillinga plurality of holesfrom asingle position of the machinaand which machine will also easily remove bits that are binding .in the holes.

A meritorious feature .of the present invention resides in the means providc-ad forpropelling and steering the machine.

.A further important feature of the present invention resides in the boom construction, ,and the manner in whiehthedrill carriagaismounted and driven thereon.

Stillanother important feature of the present invention is the flexible control means ,forcontrolling the advance of the drilLcarriage, sothat the operator may stand .clearof the machine so as toavoid falling rocks and the like.

Yet another important .ieature .of the present invention. iresides in the mast construction and the means by which the boom is .mounted -on the mast for vertical as well as pivotal. move.- ment.

Final important features of the present invention to be set ,forth, specifically herein reside in the mast beingsupported on a rotatable turntable, which turntable-is in: turn mounted on ;a vertically adjustable boom carriage, and :the turntable. and the boom-carriage. being provided with registrable openings for the drillinglof ,vertical holes.

These; together withva-rious ancillaryieatures andobjects .of the invention which will later becomeapparent asathe following clescr iptiomnlioceeds, are attained with the present invention,

a preferred ambodiment of" which has been illustrated byway of example only in ithe accompanying drawings, wherein:

liignire 1 is: a side. elevational view of the ldrill.-

ing unachine with po tions he same heme:

2 shownb'roken away,.and with alternate positions of the arch and the boom being indicated in dotted outline;

Figure 2 is a 'top plan view of the machine shown in Figure l with.the,means for .grotating i theturntable beingremoved Figure .3 is an enlarged rear elevational view of the upper portion of themast construction, and illustrates particularly the mountin means for the boom and the means by which theboom iselevated relative to the mast construction;

Figure 4 is a detail sectional viewtaken upon the plane of the section line l l of FigureB;

Figure 5 is a side elevational detail view of the means by which the boom construction is pivotally secured on the boommountingmeans;

Figure 6 is a longitudinal detailed sectional view of the boom construction with portions being broken away, this view being taken iipon the plane of thesectionline 6;6 of Figure 7;

Figure 7 .is a transverse sectional view taken upon the ,plane of thesection line -17 in Figure 4;

Figure 8 is a bottom plan view of the drill carriage;

Figure 9 is an enlarged detail viewillus'trating themannerin which the lower ends of'the mast standards arepivotally securedto theturntable, with an alternative position of=the ,mast standard being. shown in dotted outline;

Figure loisa detailsectional ViEBW taken upon an enlarged scale and upon the plane of thesection line l0.l,0 of Figure 1;

Figure .11 is another detail sectional view, this view being taken upona plane at right angles to theplaneofqthe section shownin Figure 10;

Figure 12 is a -vertical sectional viewsimilar to thatshown inFigure -10;-how ever,'this view beingtakenat the-other end of the arch;

Figure 13 is-ancnlarged sectionaldetail view of a portion of the means by which-theboomcarriage-is elevated and lowered Figure 14 is a detail view, partially-in-vertical section, of the means provided for selectively driving the individualtreadsvof the machine;

Figure 15 is anelevational view of the drive gear provided with clutch sleeves;

Figure 16 is-an elevational view of 1 one of the slidably mounted clutch elements shownin- Figure .15 and,

Figure .17 is a side-elevational detailiview, partially in section, of the meansprcvidedfor selectively braking one ofthe treads of themachine.

Reference is nowmade more specificall y to the same comprises broadly a self-propelled vehicle l2, the frame I4 of which supports a boom carriage I5, such boom carriage I6 being vertically adjustable with respect to the frame I4. A turntable I8 is rotatably mounted on the boom carriage I8, and such turntable I8 carries a mast construction 29 for rotation therewith about a vertical axis. A boom construction 22 is pivotally mounted intermediate its ends (see Figures 3 and 4) on a boom mounting means 24, such means 24being adjustable vertically with respect suitably fixed or keyed upon the shaft 56 (see Figure 13) whereby the shaft 56 may be rotated to rotate the links 69 to raise and lower the boom v, carriage I6. The Worm pinion I4 is operatively to the mast construction 29. A drill carriage 26 is mounted for reciprocation along the length of the boom construction '22, and a pneumatic drill 28 is carried by the drill carriage 26 for drilling holes.

From the above general description it will be seen that within the limitations of the movements afforded by the boom carriage I6, the turntable I8, the boom mounting means 24, and the pivotal movement of the boom construction 22 relative to the boom mounting means 24; the drill28 may be operated and advanced along any line intersecting the vertical axis of rotation of the boom construction within a large spacial region, and that the line selected may intersect such vertical axis at vertically adjusted positions and be vertically inclined thereto.

In detail, the vehicle I2 is self-propelled and includes endless treads of the caterpillar type 39 and 32 suitably mounted upon the opposite sides of the frame I4. The frame I4 includes longitudinally extending side members 34 connected adjacent the rear end of the vehicle I2 by a cross member 36, and a pair of rearwardly extending frame members 38 are formed on the member 34 in spaced relationship to the side members 34. The drive shafts 49 of the drive sprockets 42 for the endless treads 39 and 32 are suitably journaled in the frame members 34 and 38, and sprockets 44 are suitably secured to the shafts 49, in the spaces between the frame members 34 and 38.

Aligned drive shafts 46 and 48 are rotatably mounted for rotation on the frame members 38, as at 59, and are provided with sprockets 52 in the spaces between the frame members 34 and 38. Drive chains 54 are entrained over the sprockets 52 and the respective sprockets 44 in the spaces between the frame members 34 and 38, whereby the action of the treads 39 and 32 may be controlled respectively by the shafts 46 and 48. Means shown in detail in Figures 14-17 to be described presently are provided for selectively driving and braking the shafts 46 and 48.

A transverse shaft 58 is disposed forwardly of the transverse frame member 36 and has its opposite ends suitably journaled in the frame side members 34, as at 58, A rear pair of transversely spaced links 69 have their lower ends fixedly secured to the shaft 58 for rotation therewith, and have their upper ends pivotally secured as at 62 to depending brackets 64 carried by the boom carriage I6. In addition, a pair of forward, transversely spaced links 66 is provided,

the upper ends of which are pivotally connected as at .68 to depending brackets I9 carried by the boom carriage I 6, the lower ends of the links 68 being pivotally connected, or mounted upon inwardly extending stub shafts 12 carried by the frame members 34. It will be understood that the links 69 and 66 are all of equal length and in parallel relation to each other, whereby the boom carriage I6 may be moved vertically along the arc defined by the links 69 and 56 with the engaged by a worm I6 mounted upon a shaft I8, the end of the shaft I8 adjacent the worm pinion I4 being suitably journaled in a bracket 89 carried by the the frame I4 by means not shown, an intermediate portionof the shaft I8 being suitably journaled in a bearing 82 carried by the transverse frame member 36, and the rear end 7 of the shaft I8 being provided with a crank handle 84, whereby rotation of the shaft 56 may be effected.

'The turntable I8 is rotatably positioned on the top of the boom carriage I6, and any suitable means may be provided for retaining the turnv table I8 from lateral displacement from the top of the boom carriage I6, and such means may conveniently take the form of retaining flanges 86 carried by the boom carriage I6 that are in- I turned to overlie the upper surface of the turntable I8. Means is provided for rotating the turntable I8 upon the boom carriage I6, such means comprising gear teeth 88 formed upon the annular periphery of the turntable I8.

boom carriage I6, in which bracket 89 is rotatably mounted a pinion 99 that is in mesh with the gear teth 88, the arrangement being such that -rotation of the pinion 99 will effect rotation of the turnable I8. In order to rotate the pinv ion 99, the latter is provided with a shaft which projects upwardly from the bracket 89 and has in the erect full line position by fastening means I92, such fastening means I92 being of the releasable type to permit angular movement of the standards 94 when desired.

The upper ends of the standards 94 are connected by a transverse arch I94, one end I96 of the arch being pivotally mounted on the corresponding standard 94 for horizontal swinging movement of the arch I94, while the other end I98 of the arch I94 is detachably secured to the other standard 94, the arrangement being such that the arch I94 may be disposed in its full line position or swung to the position indicated in dotted outline at H9 in Figure 1. The purpose of this arrangement will presently appear. While the arch I94 may be secured by any suitable means to function as described above, in the preferred construction, and as shown in Figure 12, the extremity of the end I96 of the arch I94 is flanged at H2 and is rotatably received in the split upper portion II4 of amounting collar II 6 so as to bear upon the upper end of the standard 94. The collar H6 is fixed to the standard 94 by a transverse pin H8, and the flanged end I96 of the arch is retained within the split portion I I4 of the collar I I6 by a suitable sectional clamp I29 embracing the portion H4,

As best shown in Figure 1, a bracket 89 is carried by the will :be tightened to only such an extent .as to permit rotation of thearch iil l With respect to the end IllIl of the arch AM, it will be seen upon reference to Figures wand 11 that thesame has'fixed by a pin I22 to one side thereof a section I-Zdof a sectionalclarnp designated generally at I26. The other section I28 of the clamp I2fi is carried-above the upper end of the standard 9% by a collar I30 fixedly secured to the standard 94 by means'of a pin I32. The arrangement is such that upon the arch Iii- 4 being swung to the full line position, the releasable fastening bolts I34 may be secured to the sections I24 and I28 to retain the arch in the full line position.

The boom mounting means .ZZI comprises a horizontal tubular shaft I36, the opposite ends of which are suitably secured by welding or .the like to a pair of upstanding guide sleeves I38 received on the standards .94. The sides of each of the sleeves I313 opposite the shaft I are slotted at H30, see Figure 1, and provided'with a pair of lugs I42. that fastening bolts I44 pass through the lugs I42 to adjustably clamp the sleeve I38 to the standard '94 associated therewith. It will thus be seen that the mounting means M may be releasa'bly retained at'any adjusted vertical position by tightening the bolts I44, and that the means 24 maybe moved vertically when the bolts I'M are loosened.

Means is provided for raising and lowering the boom mounting means 24, which in the preferred form of the invention comprises a cable reel I til suitably mounted on the top of the central portion'of the arch IN. The reel I46 is driven by any suitabletype of air motor I48 also mounted on the arch I04 and supplied air through the flexible conduit I59. A pair of cables I52 and I54 have their inner ends suitably fixed to the reel I46 and their outer ends secured to brackets I56 carried on the sleeves I38, the intermediate portions of the cables I52 and I5 3 being guidably received through vertical guide openings I53 provided in the arch I04. As will be apparent upon reference to Figure 3, when'the reel I is turned to'take up the cables I52 and I54, the mounting means 24 is raised, and when the air pressure .is relieved from the motor I48 and the bolts M4 loosened, the boom mounting means 24 descends by gravity. It will be understood, of course, that if desired or deemed expedient'the air motor I48 may be of any suitable reversable type or employreversing gearing, not shown, to drive the reel I45 in either direction.

As best shown in Figures 3-5, inclusive, a sectional sleeve lfiIl is pivotally mounted on an intermediate portion of the shaft I-Bi, the upper and lower sections I52 and Iiit, respectively, of the sectional sleeve IGI] being releasably retained. in :assembled relation by fastening bolts I'M. The boom construction 22 is fixedly secured to the upper section I62 and the drill carriage driving means to-be presently described is'fixedly secured to the :lower section I64 'as will be described presently.

As best shown in Figures 3, 4 and '7, the boom construction '22 includes an elongated base plate I68, upon the top of which base plate is suitably secured by welding orthe like apair of channel members lit. The channel members I'll! each includes-a web portion I'IZ and vertically spaced flanges I'M, and are disposed with the web portions H2 in back to back spaced, parallel relation.

The drill carriage (25 includes a web, portion I15 y The arrangement is such.

wearin t e mem er 4 9 nd 9 n ude less I18 disposed onfl'the opposite {sides of the members If Brac ets :I 81.0 fixed. to th .a

jacent faces .of thelegs 1:18, such brackets I carrying rollers I82 that :rotate about vertical axes and engage theinner facesofthe web portions I12 oil the members I It to restrain the carriage zfiagainstlateral displacement. In addition," the adjacent faces of the legs IIBare provided withsets of vertically spacedstub axles IM, upon which axles I84 are ,journaled rollers IBIS thatengage the adjacent facesof the upper I85 disposed betweenthe' opposite ends of the members I10. Each of the sprockets I96 isjour naled in a yoke 13a, .and the bightporticn 200 of the yoke L98 is secured to a threaded belt 202 that extends through 'end plates 204 connecting the oppositeends of the members Ill].- The outer or free endof the bolt 20.2 is-provided with a pair of :threaded nuts 2116 that "bear against the end plate 204 to lock the bolt 262 in longitudinally adjusted'position, the arrangement being such as to. afiord'meansfor adjustably" of reversibleairmotor2 M. Upon an output'shaft ZIG of the-motorZI-dis fixed a drivesprocket 213. A yoke 220 iixed .to'the housing of the motor 2 It partially :surrounds the sprocketlzm in spaced relation thereto and has its free. ends-extending upwardly. into a :slot 222 provided in the base plate 168,. The upper-ends of the yoke 220 are provided with idler .sprocketslfl'over whichthe lower flight 4-34 of the chain 19% is entrained, with the portion 20f the, chain 190 intermediate the sprockets 224 being depressed and entrained under the drive sprocket M8, whereby the chain i510, and consequently, thedrill. carriage 2.43 may be driven by the, air motor :2; IA.

The air motoritl l, which isof any'suitable reversable type, is "supplied air through the flexible conduit 2-26. iiniwhieh conduit .2225 is operatively disposed a-control valve 2280f any suitable type for controlling the operation of the motor 2-H, As best shown in Figures 1 and t. the'valve 2,23 includes a pivoted.pontrollev er 2.3.52, and means is proyided for actuating the lever. 2.3.0 from a remoteposition selected at. the. option of the machine operator. .Such actuating .rn'eans .inj-

cludes a Bowden wire 4232,thehousingtii lv of which is f xedly securedto the'base plate by a bracketT236jc1osely spaccd to the .leverifldll, and the, wire 1238. of. which-is operatively connected to the outer end'of the lever 230'. Finger control same such means 246 are normally retained in a spring clip 242 carried by the base plate I68. The arrangement is such that the means 246 can be operated when the same is supported by the spring clip 242, or the same may be removed from the spring clip 242 and used at any selected position within the range of the flexibility of the Bowden wire, which may, of course, be of any desired length.

Suitable means, not shown, may be provided for tilting the boom construction 22 on the shaft I36, and could conveniently take the form of a manually operable gear journaled for rotation on the air motor housing 2|4, which gear would mesh with a gear keyed on the shaft I36.

As clearly shown in Figure 1, the drill 28 is suitably mounted in any suitable manner upon the carriage 26 for movement therewith, such drill 28 being of any suitable pneumatically op erated character and including a bit 244, with air being supplied to the drill 28 through a flexible conduit 246.

Obviously, the present invention is to be used in conjunction with any suitable means for compressing air, not shown, and that if desired such air compressing means could be conveniently mounted on the vehicle 12. Furthermore, it will be obvious that the air conduits I56, 226, and 246 will be connected to such air compressing means, and suitable control valves will be provided in the conduits I56 and 245 as well as in the conduit 226.

As will be appreciated, the purpose of pivotally mounting the arch I64 upon one of the standards 94 is to .permit the boom construction 22 to be swung to a vertical position, and in order that the drill 28 may be utilized when the boom construction is in the vertical position, the boom carriage l6 and the turntable [8 are provided with cut-out openings 248 and 256, respectively. As best shown in Figure 2, the turntable [B may be rotated to such a position that the openings 248 and 256 are in registry so that the drill 28 may be moved vertically therethrough when the machine is used for drilling vertical holes.

As described, it will be evident that the machine may be utilized for drilling horizontal holes closely spaced above the ground level upon which the machine is supported when the boom carriage I6 is lowered, and that by virtue of the turntable l8 and the slidable mounting of the boom mounting means 24 on the mast construction, extreme flexibility in the use of the machine is afforded,

As mentioned hereinbefore, means are provided for selectively driving and braking the shafts 46 and 48, and such means are clearly shown in Figures 14-17. Upon reference to Figure 14, it will be seen that a drive housing 252 having integral mounting flanges 254 is fixedly mounted on a rearwardly projecting frame portion 256 carried by the frame member 36 by fastener 258. Although not shown as such, it will be apparent that the housing 252 may be sectional in character and detachably held in assembled relation by a pair of peripheral flanges to permit easier assembly of the parts to be described that are retained therein. As will be evident upon inspection of Figure 14, the opposite sides of the housing 252 are open and the reduced adjacent ends of the shafts 46 and 48 project into the housing 252.

A gear 266 is disposed in housing 252 and is provided with oppositely extending integral sleeves 262 and 264 which project outwardly from'the housing through the open sides thereof in concentric relation to the shafts 46 and 48. Each of the sleeves 262 and 264 is surrounded by anti-friction bearing 266, with the inner and outer races 268 and 216 thereof respectively engaging the sleeve and the housing 252. It will be noted that lateral movement of the races 268 and 216 is limited by the gear 266 proper and an annular retaining flange 2T2 carried by the housing 252, it being apparent that a flange 212 is [provided for each of the bearings 266. In this manner, the gear 266 is securely mounted for rotation within the housing 252. In a similar manner, antifriction bearings 214 are interposed between the reduced adjacent portions of the shafts 46 and 46 that are disposed in the housing 252 and the sleeves 262 and 264, respectively, whereby the gear 266 securely supports the adjacent ends of the shafts 46 and 48 for relative rotation. It will be noted that the adjacent ends of the shafts 46 and 48 are received in cylindrical pockets 216 formed in the opposite sides of the gear 266 so that the gear 266 limits endwise movement of the shafts toward each other.

The outer ends of the sleeves 262 and 264 are provided with axially extending clutch teeth 218 and 286, respectively, through which the rotary motion of the gear 266 may be communicated selectively to the shafts 46 and 48. Inasmuch as the means 282 for selectively driving the shaft 46 from the gear 266 is substantially identical to the means 284 for driving the shaft 48 therefrom, it is deemed that only a description of the former will suiflce for the purposes of this specification. In order to drive the shaft 46 from the gear 266, a sleeve-like clutch element (see Figures 14 and. 16) 286 is slidably mounted on the shaft 46 for movement toward and away from the housing 252, the shaft 46 being provided with elongated keys 288 engaged by the element 286 to prevent relative rotation of the latter with respect to the shaft 46. As clearly shown in Figure 16, the outer periphery of the end of the element adjacent the housing 252 is provided with a plurality of circumferentially spaced recesses 296 that open toward the housing 252, the arrangement being such that the clutch teeth 216 on the sleeve 262 are received in the recesses 296 when the element 266 is moved to the dotted line position shown of the same in Figure 14 to establish a positive driving connection between the gear 266 and the shaft 46, as will be apparent to those skilled in the art.

In order to selectively engage the element 286 with the clutch teeth 218, a handle 292 is pivoted to a bracket 294 carried by the housing 252, the handle 292 being connected to the element 286 by means of a ring 296 rotatably mounted on the element 286 and retained thereon by spaced ribs 268, such ring 286 carrying a bracket 366, with a link 362 pivotally connecting the bracket 366 to the handle 292. The arrangement is such that when the handle 292 is swung toward the housing in the direction indicated by the arrow 364, the element moves from the full line position to the clutching position shown in dotted outline in Figure 14.

As thus far described, it will be clear that either conventional type is mounted on the frame memmeans for verticalswinging movement between the vertical standards, means for elevating and lowering the mounting means, clamping means carried by the mounting means for releasably retaining the latter in a vertically adjusted position on the vertical standards, a drill carriage movably mounted on the boom, and means for advancing the drill carriage along the length of the boom, said boom carriage and the turntable having registrable vertical openings permitting drilling along a line substantially parallel to the standards and closely spaced to the plane of the latter.

6. In a drilling machine, a frame and a boom carriage carried thereby, means for elevating the boom carriage relative to the frame, a turntable rotatably mounted on the boom carriage, an upstanding mast supported on the turntable, said mast comprising a pair of parallel vertical standards connected at their upper ends by a transverse arch, boom mounting means slidable on the vertical standards and extending therebetween, an elongated boom pivotally carried by the mounting means for vertical swinging movement between the vertical standards, means for elevating and lowering the mounting means, clamping means carried by the mounting means for releasably retaining the latter in a vertically adjusted position on the vertical standards, a drill carriage movably mounted on the boom, and means for advancing the drill carriage along the length of the boom, said arch having one end pivotally connected to the upper end of one of the standards for horizontal swinging movement, the other end of the arch being detachably secured to the upper end of the other standard. I

7. In a drilling machine, a frame and a boom carriage carried thereby, means for elevating the boom carriage relative to the frame, a turntable rotatably mounted on the boom carriage, an upstanding mast supported on the turntable, said mast comprising a pair of parallel vertical standards connected at their upper ends by an arch, boom mounting means slidable on the vertical standards and extending therebetween, an elongated boom pivotally carried by the mounting means for vertical swinging movement between the vertical standards, means for elevating and lowering the mounting means, clamping means carried by the mounting means for releasably retaining the latter in a vertically adjusted position on the vertical standards, a drill carriage movably mounted on the boom, and means for advancing the drill carriage along the length 01 the boom, sai-d boom carriage and the turntable having registrable vertical openings permitting drilling along-a line substantially parallel to the standards and closely spaced to the plane of the latter, said arch having one end pivotally connected to the upper end of one of the standards for horizontal swinging movement, the other end of the arch being detachably secured to the upper end of the other standard, whereby the arch may be swung to one side to permit alignment of the boom with said openings.

8. In a drilling machine, a mast comprising a pair of vertical parallel standards, a transverse arch connecting the upper ends of the standards; boom mounting means comprising a horizontal shaft extending between the standards and having means at its opposite ends slidably guided on the standards, means carried by the arch for elevating the mounting means, means for releas- 12 ably securing the boom mounting means against vertical movement, one end of said arch being pivotally connected to the upper end of one of the standards for horizontal swinging movement, the other end of the arch being detachably secured to the upper end of the other standard, an elongated boom pivotally mounted on an intermediate portion of the shaft for vertical swinging movement, a drill carriage movably mounted on the boom, and means for advancing and retracting the carriage along the length of the boom.

9. In a drilling machine, a frame and a boom carriage carried thereby, means for elevating the boom carriage relative to the frame, a turntable rotatably mounted on the boom carriage, an upstanding mast supported on the turntable, said mast comprising a pair of parallel vertical standards connected at their upper ends by a transverse arch, boom mounting means slidable on the vertical standards and extending therebetween, an elongated boom pivotally carried by the mounting means for vertical swinging movement between the vertical standards, means for elevating and lowering the mounting means, carried by said transverse arch, a drill carriage movably mounted on the boom, and means for advancing the drill carriage along the length of the boom.

10. In a drilling machine, a frame and a boom carriage carried thereby, a turntable rotatably mounted on said boom'carriage, a boom associated with said turntable for movement about a horizontal axis, said boom carriage and turntable having registerable vertical openings permitting movement of said boom into a vertical position.

11. In a drilling machine, a frame and a boom carriage carried thereby, a turntable rotatably mounted on said boom carriage, a boom associated with said turntable for movement about a horizontal axis, said boom carriage and turntable having registerable vertical openings permitting movement of said boom into a vertical position, said boom having mounted thereon for longitudinal movement a drill carriage.

12. In a drilling machine, a frame and a boom carriage carried thereby, a turntable rotatably mounted on said boom carriage, a boom associated with said turntable for movement about a horizontal axis, said boom carriage and turntable having registerable vertical openings permitting movement of said boom into a vertical position, said boom having mounted thereon for longitudinal movement a drill carriage, said boom being adjustably supported from said turntable by a vertical mast for both pivotal and vertical movement.

RICHARD L. GALLO.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 7,972 Fowle Mar. 11, 1851 1,098,014 Carter May 26, 1914 2,044,878 Curtis June 23, 1936 2,048,072 Johansen July 21, 1936 2,268,573 Osgood Jan. 6, 1942 2,271,821 Hart Feb. 3, 1942 2,365,749 Curtis Dec. 26, 1944 2,377,279 Stewart May 29, 1945 2,389,558 Slater Nov. 20, 1945 2,396,365 Feucht Mar. 12, 1946 2,512,497 Lee June 20, 1950

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