US1465372A - Mining machine - Google Patents

Description

- Aug. 21, 1923.

G. W. STARR ET AL MINING MACHINE Filed July 425 1921 6 Sheets-Sheet l VIII/IM Aug. 21, 1923 G. W. STARR ET AL MINING MACHINE Filed July 25 1921 6 Sheets-Sheet 2 .m wm@ V M maw/m m, l... N

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Aug. 2l 1923.

G. W. STARR ET AL MINING MACHINE 6 Sheets-Sheet 3 Filed July 25 1921 Aug. 21, 1923. 1,465,372

G. w. STARR ET Al. l

MINING MACHINE Filed July 25, 1921 6 Sheets-Sheet '4 ATTORNEYS Aug. 21, 1923. 1,465,372

G. w. STARR ET Al.

MINING MACHINE Filed July 25, 1921 e sheets-sheet 5 Illlll Bv la/gft w; ATTORNEYS Aug. 21, 1923. 1,465,372

G. W. STARR ET AL MINING MACHINE Filed July 25, 1921 6 sheet's-sheet e fig z2.

lllllIlIlullIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII l I I I l I I l l 58 l NVENTORS A M am A TTORNE YS Patented u. 21, 1923.

UNETED STATES PATENT OFFICE.

GEORGE W.`STARR AND WILLIAM D. PAYNTER, OF GRASS VALLEY, CALIFORNIA.

.MINING MACHINE.

Application led July 25,

To all whom t may concer/a.'

Be it known that we, GEORGE W. STARR fand VILLIAM D. Pilvrfrmz, citizens or' the `United States, residing at Grass Valley, in the county oi' Nevada and State of California, have invented certain new and useful Improvements in Mining Machines, of which the following 'is a specification.

Our invention relates to mining machines, and more particularly to machines for chippingl out ore bodies.

rlhe primary object oit our invention 1s to provide a machine for mechanically chipping out a vein of orewithout removing any appreciable quantity of the surrounding waste rock. By the use of such a machine, the necessity Ylfor blasting is obviated, with appreciable qirantity of the surrounding rock and relatively large expense for re lmoval ol waste and increased timber-ing, and the cost ol working and handling the ore is greatly reduced, not only by the elimination or' much hand labor, but also by the iact that the ore removed is clean and practically free from waste rock; as well heving in a more linely di vidcdstate than when removed by blastinv.

InY the use oi the machine embodying our invention, a series of substantially horizontal er slightly inclined stope drifts are run int@ the vein, parallel with each other and at regular and frequent intervals. In actual practice, it is desirable to make these stepe drifts about four lfeet in diameter, and about leight reet apart. After the sto pe dri'lts are driven, the eight feet oi" vein re maining between them is chipped out, care being taken t0 remove as little of the waste rock as possible. It is for this chipping out or the vein,between adjacent stope drifts, that the machine embodying the present invention is primarily intended, but it is to be distinctly understood that the use ot'the machine is not'limited to this purpose. @n the contrary, our machine is capable of use in a variety oli' situations and for a great Anumber of purposes, and` may, in lact', be

' used for any chipping Yprocess to which its construction lends. itself.Y

It will be seen from the foregoing explanation that such a machine must have two principal characteristics, viz: it must be capable ci operating at right angles to the axis oi' the stope drift and within a comd parativeiy wide range of elevation and de-l i921. serial No. 437,348. v

pression; and it must not only be sulhciently compact to operate within the relatively small stope drift, but must be capable oil' lateral extension sullicient to enable it to penetrate at least to the center oi that portion of the vein betweentwo adjacent stopes.

The machine embodying our present in# vention has these two described characteristics; and by reason of its novel construction, is well adapted for working efficiently, even at the limit of its extension. This will be apparent from the following description, when read with reference to the accompanying drawings. lt is to be understood, however, that our invention is herein described and illustrated only in its preferred i'orm, and that changes, within the scope oit the claims hereto appended, may be made in the form and construction ol: the machine, without departing in any manner from the essential spirit ol: the invention.

Broadly speaking, our invention coni-Y prises an apparatus ifor supporting a. battery oil percussion machines ot any desired type, and operated by compressed air or other motive power. Said percussion machines are directed laterally, that is at right angles to the longitudinal axis of the sup- Y porting carriage, are operable through wide angles of elevation and depression above and below the horizontal, and are ied into the vein or ore body as the latter is chipped away by the action of their drill bits. lVloreover,` the entire battery is continuously and automatically reciprocated, both vertically vand horizontally, so that the entire working face ol' the vein is covered by the drills.

In order to l'ully comprehend our tion, reference should be had to the panying drawings, wherein-- Fig. l is a plan view of our complete mining machine, extended nearly to its limit, certain .parts being sliownin section.

F ig. 2 isa plan view ol the machine fully retracted. i

Fig. 3 is a plan view oi the carriage and bed 0f the machine, a `portion 0i. the latter beingbroken away.

. Fig. et is asectional front elevation of the complete vmachine taken approximatelyon the line lf-l of Fig. 2 and viewed in the direction of the arrow.

y Fig. 5 is an .end elevation, certain parts beingbroken away, showing themacliine invcnaccomwithin the stope drift and te chip out the vein.

Fig; 6 an `end elevation machine 'fully retracted.

Fig"V 7- is a central vertical section, `ta'len in av'plane represented by the line 7-7 oi: Fig. l and viewed in the direction of the arrow, the machine being shown fully retracted and certain parts sake of clearness. Y- v 'Fig 8 isa sectional detail taken in the direction o'i'i `the arrow on the line 8-8 of Fig.7. Fig'. 9 is a horizontal sectional detail, enlarged, ol the lower et extension eylinders. takeiiin the directionv olif tlie'arioiv partially extended showingthe Y Vou the line 9--9`of Fig. 1 0.

Y head, taken iii the direction of Fig. l() is a transverse sectioiioif the saine cylinders, taken in the direction of the arrow oii the line lU-J-l() ci' Fig. 9. Y y

Fig'.V ll isfa vertical sectional Vdetail lol p one ofthe sets of upper extension cylinders, Y taken iii the direction ofthe arrow on the line ll-ll or Fig'. 12. l

Y Fig'. l2 is a transverse section oi theirsame cylinders, taken in the direction oi the arrow on the line lf2- 12 oit' Fig. ll. y

Fig. 13 is a detailed 'Front elevation oit' ai vportion Vof the head i'or carrying lthe percussiouina'chinesor drills.

Fig, 14 is a sectional plan, enlargerhof the hydraulic cylinders for vertically reciproeating the drill'head.V Y i i Fig. l is a part sectional side elevation of the saine,`ta`lien yin the direction of the arrow on the line 15-15 oi Fig. lll.' i

Fig. 16' is a transversesection, enlarged, of 'the control valveor the saine, taken in thedirection ofthe arrow on the lineA 16-16 of Fig. l5'. Y

Fig.. 17 a sectional. plan, ol? thel said control valve, taken iii the direction ofthe arrofiir on the lines 'LL-17 o i' Figs. 16 and 1 8.

Fi is a transverse ser-tion o'l' .thesaine, taken in the direction oit the arrow on the 1in@ ice-18erv Fig; i7.

' Figi'. 19 isa sectional detail showingthe means for mounting' the percussion machines oii'their head, taken' in the directioii'of the arrow on the lineA lil-15) of Fig. l.

F in. Y2O is a transv rse section oit the drill l the arrow on theline 20e-2O of Fig. l. 2l' isa similar section vtaken in the Vdirection oi? the arrow VLAon theiline ofFig-1. A

Y Fig. 22 isa diagrammatic plan view of the entire machine, showingiihe 'iiui'dfconf nections ior its control v and operation;

' Figsi'QB anjd24 are respectively a diagrammatic plan and side elevation showing the method ofoperafting the machine in 'chip ping out a l vein of ore'.A

Reerringjnow more particularly At0 the omittedY for Ythe tegrallv -f ab di.awii i"s,"tlie reference numeral 25" desigadapted to run on rails 28 laid in the stops.

drift, the latter..being'designated-, .ii' the views inwhich it appears, by the letter A.

` rlhe vcarriage is movable laterally, for a limited distance, withvrespect to its wheels, for the purpose of Vshifting-v the entire machine to one sideor the other. 'Fo' permit such iiiovon'ient there is provided, upon eachfaiile i 26, a. removable split and liingijed'collar 29, Y

shown iii- Figs. 5, 6, Tand S, which acts as:v

a spacer between tliel'side oiitliecarriage 25 and the wheel 27. By removing these collars'the ige may be moved laterally,to 'Y the left as viewed in Figs.. 5, 6 and?, and the.

collars can thenl be replaced on the opposite or right-hand sidev of sail carri fre. :The axles 26 slide through-the wheels 2.4' in thisV movement, as shown byv he dotted lines.

v'ihe carriage 25 is formed witli'floiigitudiiially directed lguides 30 atits sides, and in said guides is V h tted, for `reciprocal sliding` movement longitudinally oi'i said carriage, a

bed 3l. shown in Figs. l ro-7. The means Y "for which itis done, will be hei'einaii'ter? Vforth. The bed 3l carries tivo spaced liear- Y .shown iii l, 2. 45, 5 and (5.". Saidcylin# der casting is therefore eapableloiaiocking Y for reciprocating said bed, andthe purpose i lThis longitudinal axis .oit the carriage. Y'

movement is 'produced by ther following mechanism. l Y i K y l Secured Vto the end of each tri'ii'ii'iionaworniwheel sector 35, Figs. 1,2, and',

with which is nieshed a worin 3G carried ii pron "airinclined Vslia'ft rotatably incl. ited fin suitablebearings 38; The rear end` oiY i shalt 37 carries a worin-wheel 3Q. eda15 e to inesli. with a wor-inkl() rnoii'nted oii'jthe ui''pei.' end e'l a second inclii'ied shalt lll.

iflerel gears i2 at'fthe lower ends o'j the shal'ts iii'esli with Vcorresnonding' bevel 'gears #l-3 secured to a longitudinally directed shaft; lei extending' entirely through the bed This latter shaY is provided; with squared ends'. upon which may beltiited cranks, one such crank'being shown atll "imi n ier;

lli)

iis

in F ig. `ll. Thus by turniiiin'the'crank 451.v

iiianually,":the cylinder castiiig'rllmay'lief veither direction"within its; noar-v The cylindercasting` l-l'carries thr allel setsl o i extensible l'elesepiiief'ey-hi adapted to support theperciissioii and between the other twoifas shown clearly ire Y l M iaie iiiies,; for drills,V one -set beingv positioned; below by water under pressure.

larger portion ol: the outer cylinder.l SiniN ilar'i'q the interior diainieter o'f the inner cjlinder is reduced it its forward portion,

as shown :it 52, to 'li' "n zi guide Jfor the pis ton rod l-S, and seid piston rod cnrril'fs zi rusten heed 53 operable in the larger portion ol seid inner cylinder. Suitzfile packing l is provided llie y'Forward ends olf lioth the outer :nui the inner cylinders.

uhesecylinders are operated preferably lfor entendu ,g

the piston rod 8, water is edinittei'l through n passage in ille reni' heed l-Si, thus 'forcin g both pistons 5l and out. To retract seid pistons, water is yadmitted through ai port 56, Figs. 9 :ind l0, into the forward end vof the outer cylinder, :rnd ilows thence through passages 57 'formed in the wall o''i the inner cylinder into the forward end ot seid inner cylinder, thus 'forcing both pistons '5l and. 53 rearwardly. ',lhe arrows in Fig. 9 indicate the direct-ion ol' iiow of the water :nid the direction oi triii'el ol liie pistons durinj-gl their reni-wird stroke.

he forward end ot the piston rod fiS cirrries a yoke 5S, l :ind t, whose ends are Iixed to Aand support the rear cylinders 59 or' the two upper sets, so that seid upper cylinders are nioved forward sind lizickr-fsird hv seid lower piston rod 4&8. The two upper cylinder sets ure identical in construction, .sind are shown .inost clearly in Figs. l. il and l2 wherein one set is shown in section.

YThe cylinders 59 are guided :indl :idditioimlly supported liy pui oi? telescoping' sleeves 60, Fig'. l. the rearinest ot which telescijipe into O Ylinf'lriczd portions 6i ot the cestino" Each oi the cylinders 59 is provided with ifrezir head 62, Figs. l und lhan inner sliding' cylinder (33, and n piston rod Gilsliduble within seid inner cylinder. These Vlinders are similar in construction to the lower cylinders described above, there lil' piston heads and 66 secured to the leur ends et theinncr cylinder 63 and the pistonk near. its 'forward end, and thence through passages 72 in the well oi the inner cylinder G3 to its interior near its forward end. The arrows in Fig'. il indicate the direction liow of the water und the dir iction ot trvel oi? the pistons when retrlictingg. lt should he apparent ifi-oui the imfegoing that, by :rdniitting water to the lower cylinder set, the relie 5o', airrying` the upper cylinder is first nioved out or in. :as the crise muy ile, and that 'oy admitting writer to lhe upper cylinder sets, the piston rods :ire moved still farther out or in.

n 'llic upper piston rods ceri-y, :it their outer ends, the hond 'l'or sul lifting the percussion nnichines or drills. "ihis head coni prises u relatively stationary portion and e reizitireiy niovnole portion. 'ihe relatively slationzrry portion consists ot it tinnsverse recllznigulzir inar, i, :ind T, sec red te the ends or the piston reds (il, rnd hei i115` slni'l'ts Tl Al'orined integrally wi n und enter lingY considerably beyond the ends ot sli-id rectangular bnr. Therelzrtireiy nier-- able portion comprises e bur 75 mounted tor iiniited rocking inotion about the shaft portions yllVncind secured thereto by hearing caps 76j 'ihe central portion or the rear face oi seid bar 75 is cut eivziy, as shown fit T7 in lf 'grsf and 2i., to allow it to rock in iront oi' the lined her T25. y

The birrf is provf'ided-inits iront. iiice with :L series of Vertical undercut tapering slots 752 Figs, l, 52, l and l), in which are secured the corresigiondingiy toi-ined ceses T5) oli the percussion nniehines` or drills Si). llzich drill T) is proifided with e. stud und nut to lock it seiirely within its sio; 78, ns shown'lit 8l in Fig. i9. The percussion machines Si) nitty he 'pera-ted lijf any suitlilile 'torni olf nietivc gower :ind may lie of any desired torni rind construction adepted lo r ceive sind operate drill hits L52 for chi'l'ipinln' sway the working tace l5 oi' the ore vein, hut tor convenience in illustration, we here represented these lziehines as compressed sir drills of the usual weil ,known type.

rEhedrill-heed supporting lier T3 has exn teniling 'from it :t pair ol" rigid brackets 323-- lfigsjl, 5 end t3, whose rear ends :ire l'orled to striiddle the niovnbie drill-heed if), and whose forward ends curry horizontally dispf ed rollers adopted to heer einrinst the w nur; ilicefl ofthe rein, to prevent the dnlls troni heini: ted into said working,

nice too rapidly ey the hydraulic pressure ineinteined in the .extension cylinders described ELO -neld togetherv by bolts 85 passing` through slots, indicated rit S6 in Fig. l, in their for* 6@fthe.portsleadingfrom Vthe valve casing 98 Jet avai-d portions. kThe drill-head supporting barv 73. is also provided with rollers 87, Figs. :E and 13, which bear against thelower face C of the working, thereby supporting the weight 'of the drills and drill-,headV when the vein has been worked outto a depth greater than the length o' the drills.V

YThe drill head75, as stated above, is ca- V'pable @t oscillation about its supporting Vshafts 711, to enablethe drillsto operate throughout the width of the Vein.' This osc'illationV Ais carried lon. automatically andv continuouslyduring the operationgof the machine, movingthe drill bits'sl'owly up Y the drill-head 75, so that'reciprocating Y inovementot' said pistons 90withintheir the valve itself. controlled by a valve 'operated by the movement of the pistons.

said drill-head.

inexas shown in Fig. 5. V erating the pistons 901s controlled by a valve, shown in 14: to 18, and said`V e valve is preferably operated by compressed cylinders causes oscillating movement of Y The pistons 90 are preferably operated byV water` undery pressure. It should be pointed out, infthis connection, that We pre- 'lfer t0 use two tandem cylinders merely tor therpurpose oi securing the necessary power 'to oscillate the drill-head, and still keep down the diameter of said'cylinders, so Athat they will enter the relatively narrow work- YThe water Vfor opair, to secure greater speed'of operation of The air supply 1s, 1n turn,

A valve operating rod 94, Fig. 14is se# cured to the rear piston 90,V and extended through the head of the rear cylinder. Said rod carries two spaced collars 95, which, near the ends of the stroke, abut against and `more a lever 96 whose outer end is connected' with thel air control valve 97. This valve, asf'shown in Figs. V16 and 18, is ofY the piston type, operating within a casing 98, and controls the air'supply to a working cylinder 99, F igs.'` 16, l17 and 18, in whichis a piston 100 mounted on the' rod of theiavater control valve 101. -In Fig. 18V

102 is the air inlet, 103 the outlets, Vand' 101- "to'theffworkingfvcylinder' V99. The water control valve 101 lis .alsof'of the piston'type, working within Va casing,V `105, and controls the(l waterfsupply to the` hydraulic cylinders" se. Y in Figs-1 6 ana-'17,' roe is are water-iniet, 107 the discharge, `and 10e ai@ poi-ts leading to the cylinders 88. `Said ports communicate with passages 109, Fig. 1l`,

which'arerformed partly Within the cylinder walls and 'partlv by connecting pipes 110 and which lead to the opposite ends or' both hydraulic cylinders.

lin order to support` a portionv of.V the 'i weight of the drills, we provide balancing springs 111, Figs. 1, 2 and 20, extending :be-

.tween fixed arms 112 secured to the drillhead shafts 74C and brackets 113 secure-d 1n v any suitable manner to Athevdrills atV some.V

point suiciently far orward'otl said Vshafts- 7 rlhe arms 112 extend through slots 1111, Fig. 20 in the drill head. There may be as many .olifsuch springs as structural consid#YY erations necessitate., but for/convenience only two are shown in the drawings..

As previously stated, Vthey bed 31 is capableY of reciprocating movement upon the carriage 25 in a direction parallel with the longitu- Y dinal axis of the 'stope drift A. This move-jment, like the oscillating motion of the drill head, is automatic andy continuous during te:k

the operation of the machine, andV carries the drill-bits back and forth horizontally over the working face B. Thus the drillbits are l working face., both vertically and horizon'- tally/,gin

continuously traveling overk the order to: enable them to reach allV portions of said face. The feed guide rollersY Y w 811, being carried by the non-oscillating drill head support 73, travel over the Vworking face only in a Y horizontal direction.' The drill-head supporting rollers 87, also, travel bac-k and forth over vthe lower face C of the working. The vertical Aoscillation of the 'Y drill head is clearly indicated Figs. 5 and Qlof the drawings,`andthe horizontal reciprocation of the bed, 'and its effect on the g working, is-indicated vdiagrammatically' in Fig. 23. Y

The aforesaid reciprocating movcmentof the bed 31 is, produced by a pairv of oppo sitely disposed cylinders .115, Figs. 1, 3, 4,

5,V 6 and 7, mounted rigidlyon the forward side ot' the carriage 25. Said cylinders con- Y e tain slidable pistons 116,1Fig.'4;, ixed uponpiston rods 117 whose outer ends are secured' Ato the carriage 31 by brackets 118, as shown .Y

in Figs. 3, 1 Vand 7. V VSaid cylinders are preff erably operatedA` by water under pressure,

lcontrolled by'A an air-operated valve 119,

Figs.A 3 andvGpositioned beneath the carriageY 25Y near one end thereof, and. similar incoi'istruction and'operation tothe valve 'for controlling thehydraulic cylinders88,

iisL

describedrabove. Said Vvalve 119v is operated vby aflongitudinahy"disposed s livdable rodA 120, Figs. 8 and'l, provided Ywithespaeed vcollars 121 which are adapted to be .engaged by thefforked endfof an f armY V12p?. ixedlt'oY 'Y tliebedgjand extending!devnwardly'the from through Vafslot123, k3y, 'formedlin the carriage 25. The valve 119 is connected,

i-.n thc proper arrangement, with the cylinders by pipes 124, Figs. 3 and 4.

rlhe various fluid connections for controlling and operating the machine are shown diagrammatically in Fig. 22. To extend the lower cylinder set, comprising the cylinders and 4T and the piston rod 48, water is admitd through a flexible connection 125, a1 i for extending the upper cylinder sets, comprising the cylinders 59 and G3 and the piston rods (34, water is admitted through the flexible connection 126. For retracting 'the .lower and `upper cylinder sets, water is admitted through the connections-127 and 128 respectively. It is to'be understood that the waste water is exhausted from all cylinders through the same connections. Suitable valves are indicated at129 in all .the said connections. l

vsater for operating the bed reciprocating cylinders 115 is introduced through a connection .13() to the control valve` 119,.l to and from said cylinders by the pipes 114, and orihausted through the connection 131. Similarly, water for operating the drill oscillating cylinders 8S is introduced Ythrough a connection 132` to the control valve casing 105, and Y 133. Air for operating said valves is' sup plied through connections 134, and that for operating he drills S() is supplied at 135.

The operation ot the machine may be briefly suumiarized as follows. in the be- ;inni g, the cylinder sets are all fully restope dritti-1, as shown in Fig. G. Then hy means oin the crank 45 shown in Fig. 4, the shait 414. is rotated, thereby elevatingror depressing the drill-head to the proper angle toenable the drills to enter and follow the vein. The machine is capable ol" a considerable range ol3 elevation and depression, as shown diagrammatically in Fig. 24. The bed'l is cut away, in its central front and rear regions, as shown at 136 in Fig. 3, to clear the lower cylinder set when the cylinder casting is swung to the limits of its mo vement. l

l'Vhen the machine has been properly set to follow the vein, water is turned into the extension cylinders through the flexible connections and 126, F 22, thus forcing the Vdrill-bits S1 and their guide rollers 84 against the exposed face of the vein, as shown in Figs. 1 and 5, and at the same time air is supplied through the connection 135 for operating the drills 80. Air and water are then supplied to thevalves of the reciprocating cylinders 88 and 115, through their respective connections as previously described, thus causing the drill head to oscillate up and down and the bed to reciprocate back and forth, carrying the drill-bits over every portion of the working face of the exhausted through the connectionl to enable the machine to enter the` vein. As said face is chipped away, the drill-bits are automatically fed forward by the water pressure in theextension cylinders until the limit of their extension is reached. The Water is then shut off from the connections 125 and 126, Fio. 22, and turned in to the connections 121- and 128, thereby retracting the extension cylinders to the positionshown in Fig. 6. it the same time, the power. for operating the drills and the reciprocating mechanism is shut oli". Finalf ly, when the machine is suiliciently retracted, it is moved to a new position and the operation is repeated.

l. A mining machine .comprising a carriage; telescoping cylinders mounted on the carriage; a piston in the innermost cylinder; a drill-head associated with said piston; and fluid-pressure connections adapted to reciprocatively extend and retract said piston and cylinders, to feed and withdraw the drillhead into and 'ron'i the ore vein.

2. A mining machine comprising a carriage; telescoping cylinders mounted transversely on :the carriage and adapted for eX- tension and retraction laterally therefrom; a drill-head associated with said cylinders; andv Huid-pressure connections adapted to reciproca-tively extend and retract said cvl-V inders to feed and withdraw Ythe drill-head into and from lthe ore vein. Y

3. A. mining machine con'iprising a carriage; telescoping cylinders mounted transversely on the carriage and adapted for eX- tension. and retraction laterally therefrom; a drill-head associated with said cylinders; fluid-pressure connections adapted to reciprocatively extend and retract said cylinders to feed and withdraw the drill-head into and .from theore vein; and fluid-pressure mechanism for angularly elevating and depressing; said cylinders.

Y 4. .ln a mining machine, a carriage; a plurality' of sets of telescoping cylinders mountedthereon; pistons in the innermost cylinders of. each set, the piston of one set being connected with the outermostcylinders of the other set; a drill-head carried by the pistons of said other sets; and fluid pressure means for extending and retracting said cylinders'and pistons. i

5. In a mining machine, a carriage; a series of telescoping cylinders, the outermost cylinder being mounted riage; a pistonl within the innermostl cylin der; asecond series of telescoping cylinders. the outermost cylinder thereof being cony nected .with and moved by the piston of the first series of cylinders; a piston within the innermost cylinder oit said second series; a drill-head carried by said second piston; and fini d pressure means for operating said cylinders and pistons. A

6. In a mining machine, a carriage; a cylupon said can Y inder casting mounted th'ereoii; a series of scoping guide sleeves surrounding the'outermost cylinder of' said second series;

saidv sleeves operating Ywithin a cylindricalbore foi-ined insaid casting; Va piston Within the .cylinders and pistons.`

drill-head carried loysaid 'second piston;

and fluid pressure nieans for operating said innermost cylinder orl AtheY secondY series; a

7. lnrainiiiing inachiiiei a rcarriaege;` a d illiead; means 'tor supporting vsaid drilli head from said carriage; mechanism Vfor 20,

.oscillating Vdrilllieed in a vertical plane; and mechanism 'for reciprocating said sup- )oitino ineans unen saidjcarriaee in aili'oria drill-head lcarried i Y and Vconnected therewith.

Zio

sontrfilrplane perpendicular'to the plane oit oscillation'oi said drill-head. 25. .i

S. i'iiinining inacliine 4cfunpiising a 'cai"'- ris-.oe3 a series et telescoping cjyilinders,{the outermost cylinder.heinev mounted uponsaid carriage Y a pistoniivitliin the innermost' cyl i vsecond series ot telescopingcylindei-s, :the outermost cylinder thereof loeingY connected ivithand inoved hy the' piston oi the iirst series oit cylinders; a1 piston Within the innermost cylinder oi said second series; by said second piston 'for oscillatory inoveinentg iluid pressure 'ineans for oscillating' said drill-head; and fluid pressure `means or iccipro-eatino' said inders 'and pistons ina plane perpendicular to the plane oit oscillation et the thrill-head.

[if mining inacliineeoiiiprisingry a car-` riage series oilitelescopini: cylinders, the outermost cylinder being nieunted'iipon said carriage; a piston uit in the innermost cylinder; a second. seiies'oi? lielesco'ping cylinders, the outermost cylinder thereof heing connectifdn'itli andv inoved by the piston of the ist' series o' cylinders; a piston ivithin Y the iiiiieiiiiost cylinder of said second series;

oy said second piston ,oscillatory a drilllhead ,carried and connected t'lieieivitli tor inoi'enientg' 'duid pressureV ineens lor oscillatinelsai@L drillfhezid; A[luid pressure ineans Y id cylinders andlpistons inv a plane perpendicular to the plane ot oscillation oi" the drill-head; and v'fluid pressure nieansitoi' angulaily elevating and de-v pressing` said cylinders and pistons.

l0. il ininintgY vmachine coinprising'a car# riage;fa 'series oi? telescoping cylinders mounted transversely upon said carriage; a

said cylinders pendii mar to Vthe plane of oscillation of the? drill-lieadg 'and fluid vpressure means elevatingf v and depressing said piston VVWithin the innermost cylinder of said series; a second series ot telesco-ping outermost 'cylinder ol said second series heing` connected with and .moved by thel pis- 'cylinders parallel with the first series, the Y tono the nrst serios; a piston Within the.

innermost cylinder Voit said second series; y,a drill-head carried Vhy said secondpiston and Vconnected therewith tor oscillatory nieveL i'liiidpressure ineans i'oiV oscillatingV nient: said driil-headg and 'lluid pressure ineens for reciprocating'said' cylinders 'and pistons in a' plane perpendicular to plane O''oscillation"Y of' the drill-head.

. il. ifi. mining; machinecomprising'a Carli'` riesgo; a series of telescopi'ng eyiindcrsAv mounted transversely upon sai-d .f-ari'iagega piston ivitliin the innermost cylinder ol said series; a second series oi telescoping cylinders parallel With the iirst series, tlieoute'rmost cylinder of said second series l'ieing` con-` nected 'ivitli and moved bythe piston ofthe iii Y fes; a piston ivi'tl'iintlie `innermost cyl. der oi.' sind second series; a drill-.head

Vcai'iied hyv said. second piston and connected y scillatory movement; iluid pressure means vfor oscillating said Clfm..

head; fluid piessiireineans tor reeiprocatino' angiul arly y cylinders and pistons.

ln a mining machine, a carriage.;Y an oscillatory drill-head; means for supi'iortingr anliv-` drill-head from'said carriage; draulic cylinder carried by said supporting i 1?). ln a mining machine, a carriage gfa bedr mounted thereon for ieciproeative movesl nient; a drill-head supported from said hed;

an hydraulic cylindeiginounted on said caraiid pistons in a plane per` a piston Within said cylinder, said stonlieingg connected'ivitli saidl drill-head' for causing oscillation et the latter upon its a va veV tor 4controllin5;'`

and ypneumatic devices' iio riage; a pistou operable ivitliin said cylinder and connected with said bed; a valve for conf trollingl the admission nand discharge OtYH ivatei to and 'from said cylinder g' and pneu- :nia'tic devices for operating said valve; saidv pneumatic devices being automatically vcontrolled by the movement oi said leed.

ln testimony ivhereoif ive have signed ourY naines to this specification.

Y GEORGE W. STARR. Y

NILLAM D. PAYNTER.

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