US900951A - Tunneling-machine. - Google Patents

Description

0. S. PROCTOR.r

TUNNELING MACHINE.

' APILIGATION FILED rmsfu, 190s.

Patented 0015.13, 1908.

4 slums-SHEET n.

0. s. PROGTOR.V TUNNBLIN'G MACHINE.

I V APPLICATION ILBD PEB. 1'7, 1908. 900,951 y' Y .Patented Oct. 13, 1908.

4 BHEETSQSHB'ET 4.

UNITED STATES PATENT OFFICE.

OLIN S. PROCTOR, OF DENVER, COLORADO, ASSIGNOR, BY ASSIGNMENTS, TO THE NEW YORK.

TERRY, TENCH & PROCTOR TUNNELING MACHINE COMPANY, A CORPORATION OF TUNNE LING-MACHINE Specification of Letters Patent.

Patented. Oct. 13, 1908.

Application led February 17, 1908. Serial No. 418,874.

To all whom 'it may concern: Be it known that I, OLIN S. PaoeTon, a citizen of the United States of America, re-

iding in the cit and county of Denver and State of Colora have inventeda new and usefulTunnelingfMachine, of which ,the following is a specification.

My invention relates to improvements in tunneling machines.

The objects of the invention are: First, to

rovide a, tunneling machine comprising a rotatable head carrying a plurality of drilling machines or engines o erated` by iluid under rassure, which are ai apted to cut away the lireastrof the tunnel as the head revolves, means being employed for supporting the said head and 'for feeding the same forward against the tunnel breast as the drills cut away the surface of the saine. Second, to provide a tunneling machine comprising la rotatable head carrying a plurality of drilling machines provided with drills or inols arranged in groups, and so positioned that the drills or moils in one group travel in a diilerent area or circular path from those' in thc preceding group, the drills of each group radiating from a common point, and being set at an angle towards the direction of rotation of the head means being provided for moving the' inachineagainst the breast of the tunnel, as the nioils cut away the surface thereof, and for removing the muck or rock cliip ings continuously during tbc operation of tie machine. IAnd third, to provide means for conveying the exhaust when steam is used as the actuatmg fluid, from the tunneling machine out of the tunnel. These objects are accomplished b v the mechanism illustrated in the accompanying drawings, in which:

is a side elevation of the im roved tunneling machine as it appears w en in operation, the moils being arranged in groups o six in number. Fig. Ris a plan view of the machine iartly broken awayin places for.

the sake of c eaier illustratipn. F ig. 3, is an enlarged, front elevation of the revolubley cutter head, showing the manner of disposing the moils in order that 'they shall o )crate upon the whole surface of the tunnel rcast between the innermost and outermost nioils` the moils in this instance being arranged in groups of live each. Fig. 4, is an enlarged, vertical, sectional view of the revoluble head, showing particularly the manner of convey ing the exhaust from the drilling machines. Fig. 5, is an enlar d, vertical, lo itudinal, sectional view of t 'e car by which t e cutter head and its supporting. carriage are propelled leither forward or backward, the adjustable connection between the said car and carriage being clearly shown. F ig. 6, is av rear e ovation of the revoluble cutter head and carriage, showing the o enings through the end of the head, throng which access may be had to the drilling machines (omitted), and also the openings through which the muck is discharged upon a chute attached to the carriage, by which it-isconveyed to an endless carrying belt. Fig.- 7, is a perspective view-slightly enlarged-of oneof the bearing spools, that forms a part of the carriage steering and guiding mechanisin of the car. Fig. 8, is an enlarged view of a cylindrical nut forming an element ofthe adjusting means. Fig. is a vertical, sectional view of a pressure cylinder. And Fig. l0, is a plan view ofthe saidcylinder.

Similar let-ters of reference refer to similaiparts throughout the several views.-

Referring to the accompanying drawings: The numeral 1, designates a carriage com prising an I beam 2, supported at i-ts 'forward end by a pair of wheels 3, the axles of which are iournaled in a bearing carried by a bracket 4, which is secured to the under side of the I beam. The 4tread of each wheelv is beveled, as shown, to conform to the rotundity of the tunnel, and the treads are broad in order to support the weight upon them without cutting into the surface of the tunnel. hollow shaft 5, is supported in bearings 6, secured to the upper side of the I beam, and upon the forward end of this shaft is rigid-ly mounted, in any suitable manner, a circular cutter head 7, which comprises a band or rim 8, supported by four spokes 9, which areV formed iniiegralI with the band, and which are connected by an integral-hub. The rear cnd of the head is closed by a plate 10, which is in the foim substantially of the frustuni of which are turned edgewise to stand atan angle, or sot-hat each s oke inclines from its rear edge toward the irection of rotation of the head, and from the hub they extend at right angles to the axis of the head, for about half theirI length, while the remaining ortions extend back at an angle correspon ing to the flared portion of the end late 10. t

Upon' the rear side of each spo e, is secured a plurality of -rock` drilling maehines,and thesemay be independent rock drilling engines, such as are in common use, ora single casting 12, may be employed, as illustrated,

in `which is formed the desired number of hammer piston c .linders,'and one of these castings'is secure y bolted to each spoke of i the head, a cushioning medium 13, being inis ap f quic' `place of the common terposed'between the casting and the spokev to absorb the jar occasioned by the contact of the cutting bits with the tunnel breast.'v By employing a single casting with a plu' rality of hammer piston cylinders, a great saving of time and expense is effected, as it arent that the casting can be more y and easily secured in position than could a plurality of independent drills. The cylinders are formed Within the casting. to radiate from a common point, and they are of the usual type, and are each provided with the usual fluid operated hammer iston. In

14, such as illustrate are preferably ern` plbyed, and the outermost moll in each group extends slightly beyond the eriphery of the head, and these outer moi s cut a circle slightly greater than 'the diameter of the head, so as to give clearance to the said head, and enable it to revolve freely. t

The moils of one grou are designed to revolve in circles or paths li'ctween those of another group, and'tlius the whole surface of tlietunnel breast is acted upon, and as the nioils of each grou i radiate from a common of rotation of the head, the rock is given asla'ntingblow similar to that imparted by amanuallyV operated moi-l, and the rock` ,is

niore'easily'and effect ively chipped away.

Fluid under pressui'cis admitted to each grou of cylinders, through a common pipe 1'5,

Y whic i communicates with the valve chambers 16,-of each cylinder, and with'the forward end ofthe hollow shaft 5, which shaft enters the hub of the head, and is provided with apertures 17 which register with similar apertures in the hub, into which the free end of the pipes 15 are secured. Fluid under pi'es- Sure is admitted to the 'shaft 5, through a supply pipe 1S, which connects with a source of sup y, and with a ni ple 19 in the rear endA o theshaft 5, wliicl i has connection with the shaft, but low the shaft totum independe ery of the dis preferab ype'of dri bit, moils` ine toward the direction is rigidly secured to the end plate of the head,

and a flanged disk 24, which extends partially` into the band gear so as to clo'se the chamber. This disk 24, has an axial ho'le through which .the sliaft'5,'passes, and a suitable packing box 25 is formed on the disk to surround the shaft.

A packing rinJr 26, also surrounds the periph` 24, where it enters the band gear, and the exhaust fluid is thus revcnted fromv escaping either'around the si'aft or at the periphery of the disk. The diskl is held stationary by being bolted either to the I beam, or the forward shaft bearing 6, and an outlet ni )ple 27 is'forined upon the saiddisk,

ly in position to lie beneath the I beam, and to this nipple is secured `one end of a hose 28, which extends rearward beneath the carriage and car, and conveys the exhaust without the tunnel. This arrangement is especially desirable and even essen-y forward end in mesh with t ie band gear 23.

A worm ear 32 is also secured upon this shaft, ain meshes with a worin pinion 32^,

on the crank shaft 33, of a suitable engine 34,

supported on brackets which are secured to the I beam. Actuating lluid is admitted to the engine through a pipe 35, which connects with the supply pipe 1S, and which is provided. with a' valve 36, for regulating and cutting off the actuating fluid. andl its cutter head are propelled by a power driven car or truck'37, which is connected to the carriage in such a niannci' as to ,permit of the lateral and vertical adjustment of the. rear end of the said carriage, as will presently appear. The car 37, comprises heavy side castings 37A, which are connected by cross hars, and which are mounted on fianged track wheels 38, adapted to run upon-tracks 39, which arclaid onheil timbers 40, the

vtracks and timbers being extended, as the iiiachine advances.y The side castings are. formed with semi-circular bearing recesses 40^, near their forward `ends, in which are seated circular flanged blocks 40, which are licld in the semi-circular slots, but so as t'o be capable of beine` turned therein, by strap irons 4l, which lic between the flanges of the blocks and are b'olt-ed'tothe side castings.

Each of these blocks is provided 'with a pair of dianietrically opposite apertures 42, which,

The carriage isti1 .which connect the two blocks. ma be rigidly connected to the two blocks, 'am has a finished surface, while the rod `44 is threaded between thel two blocks and is arbeing employed to slipport a pair of rods 43 and 44 res ectively, T ie lod 43 y adjacent block, and is provided with one or more transverse holes through which any `suitable implement, such as a bar or rod, ma

be passed for the purpose of turnin the ro Upon these rods is mounted a circuar nut 45 (see Fig. 8), having diametrieally opposite apertures 46 and 47, one of which'is smooth and receives the rod 43, and the other is threaded and receives the threaded rod 45. Thus, by turning the rod 44, in the manner above mentioned, the mit 45, is moved laterallythereon, being held against rotation by the rod '.43, upon which it slides freely. Edgewise through the nut, and centrally between the apertures 46 and 47, is formed a .Y threaded aperture 48, which receives a verf tically. disposed threaded rod 49, the extremities of which are smooth and are jour naled in beai'i o0, whichV are formed on or secured to vertically disposed angle bars 51,.

which are bolted to the rear end of the I beam 2. The upper end of the rod 49,'cxtends beyond its bearing, and is provided with one or more transveise holes. 52, in

` which a lever may be inserted to turn the said rod, and by turning this i'od it is moved either up or down through the nut 45, thereby tiltingthe I beam 2, and changing the vert-ical angle of the cutter head.

The car 37, is propelled, and held against backward movement, while the machine is operating, in the followingr manner: A cog track 53, .is laid upon the bed timbers, between the car'tracksSQ, and upon the rear axle of the carv is rigidly mounted a gear wheel 54,- which meshes with the cog track. On the saine axle is also rigidly mounted a worin gear wheel 55, which is actuated by a woi'ni pinion 5G, ona shaft 57, suitably supported in bearings attached to theundcr side of the cross bars of the car. A worm gear 58 is also rigidly mounted on the shaft 57,.and is actuated by a worm pinion 59, on a shaft 60, mounted in bearings 61, secured to the car. v f v Upon the inner end of the shaft 6U, is mounted a beveled gear'w heel G2, which 1s actuated by a similar. beveled gear 63, on a shaft G4,

. moved back or forth upon l he shaft by a yokeshaped follower block GS., which is mounted on a threaded sli-aft 69, journaled in the upper V ends of the bearings G5. llie shaft 69, is

provided at one end, with a crank handle 70, and when the shaft is turned thereby the follower block will be moved either forward or backward, carrying with it the friction wheel 67, which is engaged by the yoked portion ol' the said follower block. The friction wheel G7, is actuated by a friction disk 71, on the crank shaft 72, of a suitable engine 73, which is supplied with actuating uid through a flexible pipe 74, connecting with the general sup )ly pipe 18. The pipe 74 is provided wit i a'cut oi'l' valve 75, as shown.

1t will be apparent'that when the wheel 67 is on one side of the axial center of the disk 71, and engaged thereby, it will be turned in one direction, and that when it is on the opposite side of the axial center of the disk and engaged thereby, it will be turned in the opposite direction, and that contact with the disk'adjacent to its periphery imparts to the wheel the highest degree of speed relatively to the diameter of the disk, while the speed ol the wheel is gradually diminished as it ap- ;roaches the axial center of the disk. Thus, )y contact of the disk 71 with the wheel (i7 motion is imparted to thc car through the train of bevel and worm gearing, which turns the gear 54 in mesh with tho cog track. The speed as well as the direction of niovement of the car is determined by thc proper manipulation of the. shalt (i9, and consequent moyement of thcl friction wheel (57.

The end plate 1t), oi" thercvoluble head 7, is provided with openings 76, adjacent to the rear ends of' the drilling engine castings l2,

ses'

through which access may be had` to the said any purpose, when the. machine is iu the tunnel. thereby molding the necessity ol backing the machine out. 'l`he end plate 1t), is also pro\ ided with openings 77, which occur about midwa)V olI the length olI the spokes, and at tlreir l'orwardsides, and through these opening.; the rock cliippings or muck is discharged, as (lic head revolves. Plates 7N are secured to the spokes of the head lo project at right angles therefrom, and these plates are positioned at the inner edges of the dischargev openings 77,and their function is to receive the muck as'it slides down the spokes, and guide it. through the discharge openings-T7, hence it. falls upon a chute 7l), which Vis attached to thc carriage (see Fig. (il. which delia'ers it upon an endless belt Sl). ol" any pr'eferred type, the forward end of which lies beneath the said chute. 'lhe belt Si), is mounted on suitably drums or sprocket wheels, as the case may be, according to the style of belt. As illustrated, a drum S1, on a shaft S2, suitably secured to the I beam, supports the belt at the forward end of `the carriage, and a sprocket drinn S3, on a shaft 5.4, supported in bracketsattachcdto the car., supports the belt at its rear end, The shaft St,

also carries a sprocket Wheel S5, which is conn the belt, ar l this car rests upon a platform S9, which rests upon the tracks 39, and which is attached to the main propelling ear, so that it w ith the ear may always stand beneath the discharge end of the belt., as the machine moves forward.

The recesses 11, in the .band portion of the head, occur at the outer ends of the drilling engine castings 12, and the band or rim sections, formed by the recesses 11, serve as sera ers which gather up the muck, as the hea( revolves. In order to steady the cutter head, and. prevent twisting of the carriage during the operation of the machine, I su port a pressure cylinder 90 in any suitablle manner on the forward end of the cal'- riage. This cylinder is rovided with a piston 91 on the lower em of a pistonrod 92, which is refcrably rectangular in cross section, andpextends out through a similarly shaped aperture in' the upper cylinder head 93. This cylinder head is formed with diagonally op )osite concentric slots 94, through which bo ts or cap screws 95 are inserted and screwedl into lugs formed on the upper end of the cylinder 9U. By loosening these bolts, the c linder head 93 may be turned axially, whic 1 movement of the head also turns the piston rod 92, and when the bolts 95 are screwed down, the head 93 and piston rod are held against axial movement. Upon the upper end of this iston rod is mounted a pair of wheels or ro ers 96, which are designed to contact-with the top of the tunnel, andfrom the lower end ofthe cylinder 9U, a

ipe 97 extends to the main supply pi e 18.

his pipe 97, is provided with an or( inary' three way valve 9S, which when properly mani ulated'admits actuating Huid to the cylim er 90, below the piston 91, whereby the wheels 96 are forced against the top of the tunnel, and by turning the valve to another position the supply is cut o f between the valve and pipe 18, v,and theiuid exhausts from the cylinder, allowing' the piston to drop. Should the carriage rave a tendency. to work Ato one side, owing to the excessive weight u on the side of -the cutter head which vgat 1ers the muck, it is only necessary to set the wheels 96 at a slight opposing ano'le to the direction in which the carriage is eing moved, and this-tendency on the part of the carriage vwill bc overcome, and it will move forward without swerving from a true eourse. l

The operation of the improved tunneling machine is as follows: The bed timbers 40,

.and tracks 39, having been laid., as well as the cog track 53, th maehinefisassernbled ing main an Fig. 1.` Actuating fluid isadmitted to the rear engine 73, which operates the friction v disk 71., and thereby communicates `motion to the gear wheel 54, in mesh with the cog track 53, as follows: The disk 71, actuates the friction wheel 67, and shaft C1, by which the beveled gear 63 on said shaft is turned. The beveled gear 63, aetuatcs a similar beveled gear G2, on the shaft 6l), upon which is also mounted a worm pinion 59 in mesh with a worm gear 5S, on a shaft 57 and this shaft carries a worm pinion 51j, which actuates a Worm gear 55, on the rear axle o f the car 37, and tlus axle carries the gear 54, in mesh with the cog track. In this manner the machine is moved against therock breast to be oper- .ated upon, and the valve 20 is opened, ad-

mitting air to the hollow shaft 5, whence it passes through the outlets 17, in the ends lof the shaft, and through theyseveral supply pipes 15, to the cylinders of the drilling engines. At the same time, airis admitted to the forward engine 34, the crank shaft 33 of which carries the worm pinion 32, in mesh with the worm gear 32, on shaft-31), which shaftalso carries the pinion 31, which actulates the band gear 23, and thereby'revolves As the head revolves, the moils slanting low, as accomplished by the inclination of the drilling engines, the rockis more easily and c ffectually chipped away, and the arrangement of the groups of moils causes the whole area of roc; Within the'radius of the moils to be actedupon. e

The band sections of the head scrape up the muck as it falls to the -bottom of the tunnel, and from the head it discharges through the openings 77 onto the belt S0, which delivers it to the car 88. The threaded rods 44 and 49, are yo eratcd togive thedesired inclination to t ie head, which is steadicd and heldin a true course by the contact ofthe Wheels 96'with the top of the tunnel. Some of the elements of this invention are shown in my pendinur vapplication for imrovements in tunneing machines Serial i umher 359,533, filed February y26, 1907, said prior application disclosing the supportsupplementary frames consisting of the beam and the track-wheeled frame and the adj ustablc joint between the two, to-

1.1111 tunpeling al supporting Agether with the rotary cutter head, rovided 'for rotating said carriage, a circular head carrying a plurality of independent drilling machines, and means head; a power diiven car; an adjustable connection between the head and car; and a conveyer supported on said car and connected to said carriage and arranged to receive muck from said head and adapted spokes, provided -a common point; a

. are inclined ed ewise,

to convey the muck from saidhead to the rear of the machine as it advances.

2. In a tunneling machine, a circular head; a plurality of drilling machines in the headV provided with moils which are set at an angle to the axis of the head; a power driven car; a carriage supportingthe head; adjustable means connecting the carriage and car; and means connected withl the carriage and car for removing the muck as lthe machine advances. I

3. In a tunneling machine, a rotatable head, comprising'a circular band, and a pluralitv of spokes which incline ed ewise to- Ward the direction of rotation of t e' head; a plurality of drilling machines on each of said with moils which incline in accordance with the incline of the spokes, the moils on each s oke also radiating from ollow shaft u on which said headis mounted, connected wit a source of Huid under pressure; a carriage upon which the shaft is mounted; and means for adjusting the rear end of the carriageA both vertica ly and horizontally; suplplylpipes connecting the hollow shaft wit t e drilling machines; means for rotating the head; and means connected with the machine for removing tlie muck as the machine advances. 4. In a tunneling machine, the combination with a carria e, which is laterally and verticall adjustabe at its rear end, cfa hol low sha t mounted on said carriage, connected with a source of fluid under pressure;

a rotatable head on the shaft,vl comprising a ban'l and spokes anda hub in which the said shaftis secured; a gear wheel' on the head;'a

power driven pinion in mesh with said ear` wheel, for turning the head; a oup of uid actuated drilling engines on eac spoke, 4each of said groups being inclined towards the direction of rotation of the head, while the engines of each group radiate Vfrom a common point, and are provided with moils; supply i es connectin thel engines of each group with the hollow s aft.; pipes for conveying the exhaust from the en ines; and means connected with the` mac. ine for removing the 'muck as the machine advances-- 5. In a tunneling machine, the combina.- tion with a carriage, laterally an'd vertically adjustable at its rear end, of a hollow shaft mounted on the carriage, which is connected at one end with a source of Huid under pressure; a rotatable head on the shaft,'complrising a band, and aplurality of spokes, w ich toward the direction of rotation of t ie head; a group of fiuidvopla rotatable cutter block tothe other, and

erated rockV drilling engines, spokes, whichincline in accordance with the spokes, the engines of each goup radiating from a common point, and eing provide withmoils; supply pipes connecting the enon each of said gines of each group with the hollow shaft,

and pipes for conveyi the exhaust from said engines; a gear whee on the head; a pinion in mesh with the gear wheel; and an engine on the carriage connected with a source of-power for operating the pinion to turnthe head; and a power driven endless belt on the carriage, operating in connection with the head, for removing the muck as the machine advances. ,i 4 6. In a tunneling machine, the combination with a carriage, laterally and verticall adjustable at its rear end, of a hollow s t mounted on the carriage, whichis connec at one end with a source offiuid under pressure; a circular cutter head mounted on' the shaft, havi a plurality of groups of fluid actuated dr ing engines arranged at an ang e towards the direction of rotation of the head, and being provided with moils; an end plate closing the rear of the cutter head, having openings inline with the rear ends of the drilling openings for the discharge o muck; means for rotatin the head; means'whereby' the muck is at ered and discharged through the said disc arge openings as the head revolves; andan end ess conveyor suppprted by the carrialgJ for receiving the-muc v7. a tunneling machine, they combination of a power justably connected at its rear end to said car; aihollow shaft on said carriage, connected at one end with a source of fluid under pres sure; a circular rotatable cutter head on the shaft, having a plurality of iiuid operated drilling engines, connected with the hollow shaft andvprovided Withvmoils, said engines bein arranged in groups which incline towar the direction of rotation of the head; a diaphragm on having discharge o enings; means whereb the muck is collectes and discharged thro said openings. as the head rotates; and power driven endless conveyor supported said car and carriage for catching and conveying away the muck as ist discharges from `thecutter head.

8.-.In a tunneling machine,the combineetion with a j ing a shaft journaled thereon provided with comprisin a pair of oppositelyd cular bloc vs pivotally mounted 1n of thev car; a pair of. rods exten engines, and

operated car; a. carriage ad ower d ven car; a carriage hav` thsid from one mounted stein, one 'of said rods being threaded on the portion of Vits surface lying between j connected with the hollow shaft, the engines of each group being the rear end of the cutter head i iis head; of an` adjustable coupling for; connecting the'caandes 'age,

thabiksfsndiisyf A4,me l

extending through the nut between the other two o enings and at right angles to them; a

threa ed rod in' the lost mentioned aperture; and stands rds secured to the rear end of the carriage, havingiloxes inpwhich the ends of thesaid threaded rod are pivotally' mounted, one of said ends extended to receive a lever.

9. In a tunneling machine, the combination with a carriage having a rotatable power driven cutter head mounted thereon, -a'nd a power driven car; of means for-adjustablv connecting the rear end of the carriage Wit the car, com rising a pair 'of oppositely dis-` posed circu ar an ed bloc s pivotally mounted in semi-circu a'r recesses in the sidesv of the car and -means for securing them With. inthe recesses;^a smooth rod and a threaded rod uniting the blocks, the threaded rod being extended beyond o'ne of the blocks and provided with lever receiving apertures; a

. nut mounted on the two rods, and provided lvei'ticall with'a smooth and with a threaded aperture to receive ythe res ective rods, and with a dispose threaded aperture ex' tending etween the, other two a rtures; a

threaded rod extending through t e vertical tion with a power being radially disposed While the aperture.; standards on. the rear end of the carriage,` having bearings in which the ends of the said rod are journaled, one of said ends being provided with lever-receiving apertures; and means connected with the car and carriage for removing the muck as the car advances.

10. In a tunnelin machine, the combinaadjustabl connected at its rear end to said car; a lho ow shaft mounted on the carriage, and connected at one end with a source of actuating fluid a rotatable head mounted on saids a t,-having a plurality of groups of fluid o eratedfv \dri1ling engines connected with saidshaft, the engines of each group oups in oline towards. the direction. of rotation of the head; a'gear wheel on the head; a shaft vliavi mg a pinion inmesh with the gear'wheel; a' worm gear on said shaft; a crank-shafthaving a Worm pinion in mesh with the Worm gear; an engine on said ycarriage connected with a source of actuating fluid, for operating Vsaid crank shaft; and means connected with the machine' forfcollecting and discharging the muck as the machine advances.

11 In-a tunnelingmachine,` the combination with a carriage, of a hollow shaft .mounted thereon, connected with a "source of actuating Huid; a rotatable headmounted on the shaft', having a vplurality 'of groups of ing a hub portion ii'vencar, of a carriage chine for automatically collecting and discharging the muck as the machine advances. 12. In a tunneling machine, a carriage having a hollow shaft mounted thereon, connected with a source of actuating iiuid; a rotatable head mounted on the shaft, comprisvprovided with 4a plurality lura drilling engines on -the rear of s okes, v a'y lui ac'tuate side of each spoke, and a cushioning medium interposed between the said -engn'nes and spokes, the engines being connected with the hollow shaft.

13'. In a tunneling machine, the combination with a power driven car, vand acarriage adjustably attached at its-rear end to said car; of a hollow shaft mounted on the carriage and .connectedwith a source of actuating fluid; a circular head mounted on the shaft, having a rim divided by gaps or recesses into shovel sections; spokes attached to the shovel sections and uniting in. a -hub which receives the end of the .hollow shaft; an end Vplate on the rear of the head'liaving discharge o enings on a plane with the spokes; iui actuated drilling engines connected withthe hollow shaft, and arranged in radial form on said spokes; a-chute on the carriage in the radius of the discharge openings; a power driven. conveyor beneath the chute; and means for rotating the head.

machine, the conibina- .v 4

Y 14. In a tunnelin tion with a rotatable power` driven circular head, havin fa' rim divided by' gaps or recesses into ovel sections; spokes attached to the shovel sections andunitin to form a central hub; a carriage; a ho low shaft mounted on the carriage, one end of whichis connected with a source of fluid under. pres`` .sure, whilethe other end enters the hub of.

the head and su orts -the same; agroup of iluid actuated dril g vmachines secured upon each spoke at an angle of inclination toward ity o f radially disposed 1go i the direction of rotation of the wheel, the eny gines of each group'being radially disposed and connected with the hollow shaft an end plate on the rear of the head, having-discharge openings; and achute on the carriage projecting 'into the pathv ofv the discharge openings; of a car connected to the rear end o the carriage by an adjustable connection;

and 'm'eans for ropelling the car; and `a -power driven en ess conveyer supported at one end by the carriage so as to lie beneath the chute and at the opposite end by the car.

15, In a tunneling machine, the combina- 130- tion with a carriage, and means for pro ellingr thc same; of a hollow shaft mounte on thc carriage connected at one end with a source ol' actuating fluid; a rotatable head mounted on the other end of the shaft, having n plurality of groups of fluid actuated drillingr nmchines inclined at varying angles und connected by pipes with the interior of the hollow shalt; a band gear wheel on the rear of the head; a power driven pinion in mesh with said gear;'a stationary circular llanged late mounted axially on the hollow shalt, w rich projects into the band gear and closes its rear end to lform a chamber in said gear; packmv `boxes around the axlal hole of the plate and around its perlphery; exhaustv pipes leading from the said engines, and coning.r a rcvoluble cutter nccting with't-he chamber in the gear; an outlct pipe connecting with the chamber through the stationary plate, and leading away from the machine; and means connected with the head whereby the muck is collected and conveyed away as the machine advances.

1G. A rotary tunnelin(lr machine, comprisiead; a supporting beam 'forsaid cutter head; an abutment car or truck for said 'cutter head, and its support-ll in beam; and a universal joint connecting said cutter head and its supporting beam to said car, said connecting joint bein arranged to permit any desired degree of inc ination to be given to said beam and cutter head relative tothe longitudinal axis of said car.

17. A rotary tunnelin machine, comprising a revoluble cutter ead a supporting beam for said cutter head; an abutment car or truck for said cutter head, and its supporting beam; a universal joint connecting said cutter head and its supporting beam to said car, said connecting Joint being arranged to ermit any desired egree of inclination to e given to said beam and cutter head relative to the longitudinal axisvof said car; and diametrically arranged radial adjustable roller abutment sup orts on said beam adjacent to said cutter lliead for supporting said cutter head in predetermined positions relative to the longitudinal axis of said car.

In testimony whereof I affix my signatureu in presence of two witnesses.

oLIN s. PRooToR;

Witnesses:

G. SARGENT ELLIOTT, ADELLA M. FowLE.

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