US578751A - Txcavator - Google Patents

Description

(No Model.)

G. w, KING.

BXGAVATORA.

No." 578,751. Patented Mar; 16, 1897.

PATENT GEORGE \V. KING, OF MARION, ()lliO.

EXCAVATOR.

srscmxcAnonformin part of Letters Patent 1%.

' Application'filed March 9,

To all whom "(it may concern:

Be it known that I, GE RGE W. KING, of Marion, Marion county, Ohio, have invented certain new and useful Improvements in Excavators; and I do hereby declare the following to be a full, clear, and exactdeseription of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

Myinvention relates to improvemen ts in excavators; and it consists, among other things, in-the location of the lower vertical center or axis of the swinging boom or crane low down relative to the stationary framework or body 'nally for portion of the machine, and the provision of a raised upright frame or platform for supporting the feet ofthe so-called A-frame," or invcrted-V- hape'd framathat is instrumental in supporting the boom and in supporting a brace or braces employed for'bracing the excavator laterallyand externally, boom, when it is swung laterally and rearwardly into one of its extreme rearward positions, shall abut or come against one side of the raised frame or platform, a foot of the A'frame, and upper portion of the external brace at said side of the raised platform or frame, and thereby permit the boom to be swung rearwardly beyond a line at a right angle to the body portion of the excavator and at the same time accommodate the location of the feet of the A-frame and the ex: ternal brace or braces in closer proximity to the lower pivotal point or axis of the boom.

My invention consists, also, in constructing the raised frame or platform that supports the A-frame with a chamber or hollow interreceiving the rear portion and aeeommodating the-operation of the turn-table and to extend said platformor raised frame far enough rearwardly to accommodate the most desirable arrangementof crossed braces internally thereof, and thereby brace the entire frame elfeetually and render it adequately rigid.

M y in vention consists, of the lower portion'of said raised platform or frame forwardly to form a support for a lower' brace connection and to form a bolster over the truck that supports the forward end of "the niachines body portion and form also, in the extension so that the 578,?51, dated March 16, 1897.

l896llSe1-ielNo. 522,324. (No modcld a SllppOl Efiilll'i-ilOlillOlO, for the l wer pivotal bearing oi'"ti1e boom.

lliy invention consists, furthermore, in a turn-table so constructed asto receive the foot of the boom well down into it and to extend well up on the sides of the boom, so as to cause the boom-swinging chains to exert their work well upon the boom.

My invention consists, moreover, in a pcculiar construction of the turn-table whereby no damage will be done to the table should the boom accidentally fall.

struetion and 'combinationsof parts hereinafter described, and pointed out in the claims. In the accompanying drawings, Figure l is a side elevation of an excavator embodying my invention. tion, partly in section; and Fig. 3is a top plan of portions of ures show the boom swung laterally and rearwardly beyond a line at a right angle to the body portion of the machine. Fig. 4 is a side elevation, mostly in central'vertical section, of boom-bearing members of the excavator and more clearly illustrates-the raised platform or frame that supports the A-i'rame. Fig. 5 is an enlarged side elevation, mostly in central vertical section, of the A-frame head, Showing more clearly certainfeatures -of construction hereinafter described. Fig. 6 is a section on line (3 6, Fig. 5. Fig. 7 is a top plan of the turn-table and foot of the boom or crane. Fig. 8 is a right-hand side elevation of said table and foot. Fig. 5) is a front side elevation of the turn-table. Fig. 10 is 'a section on line 10 10, Fig; 8.

Referring to Figs. 1, 2, 3, and lot the drawings, A designates the car or body portion of the excavator that is mounted upon twowheelcd trucks LL a, arranged at the forward portion. A raised platform or upright frame within the forward end of car A. The soealled A-l'rame C-an inverted V-shaped frame-is mounted upon the forward portion of platform or frame 13 and is arranged width.- wise of the machine. Frame 0 is instrumental in supportingthe laterally-s\\'ingin g boom My invention consists, also, in several other meritorious and important features of ron- Fig. 2 is a front end clevathe excavator, and these iig-' end and rear end, respectively, of the body B is suit-ably constructed at and partially or crane D of the excavator and at its upper table F, whose rear portion extends into frame ing upon a shoulder or seat jacent'sideof frame By hollow B internally thereof (see end bears the upper vertically-arranged bearing E, upon which the boom swings. form or frame B extends below the machines body portion, as shown in Fig. 1, and has its lower part enlarged or extended forwardly to form a bolster I) over the forward truck of the excavator, and the forward portion of said member or bolster baft'ords bearing for and supports the horizontallyarranged tu rn- B, that is constructed to form a chamber or Fig. 4) to accommodate its location as far forwardly as practicable Without interfering with the location and operation of the turn-table. The lower end or foot of the boom is suitably connected, preferably as hereinafter described, with the turn-table, and the axis of bearing E is coincident with the axis of the turn-table, and said tables axis constitutes the lower axis or lower pivotal center of the boom. The upper end of the boom is connected, by means of a tie-rod d, (see Fig. 1,) witha collar d, rotatably mounted upon hearing E and rest- E, (see Fig. 5,) formed at the lower end and external'lyof said bearing, and rod (1 is detachably secured at its rear end, by aihorizon tally-arranged pin d, (see Fig. 1,) to an car (1 formed upon and externally of collar d. Platform or frame B extends rearwardly into car A far enough to accommodate the extending between diagonally opposite corners of the frame, so as to brace the whole frame effectually and render it suflieiently rigid. The raised frame B is also instrumental in supporting the two bars or members G and G (see Fig. 2) of the frame of a brace employed for bracing the machine externally and laterally It will of" course be understood that an excavator is usually provided with two external braces arranged at opposite sides, respectively, of the machine, and referring. to either one of the braces with which the machine illustrated is provided it will be observed that the lower horizontally arranged bar or member of its frame is detachably secured at its inner end, by means of a horizontally-arranged bolt or pin G to a bracket b, depending from and rigid with the under side of the bolster-forming member b I of raised frame B; that the otherbar or member G of the braces frame is arranged diagonally betweenthe outer end of member G and the upper portion of frame B and is detach'ably secured, by means of ahorizontallyarranged belt or pin G to'a bracket B secured to the upper portion ortop-of the adthat bar or member G is detachably secured at its outer end, by means of a horizontally-arranged belt or pin G, to the lower end ofibar or member G; that the lower end of said member G projects beyond. the outer end of member G and has a nut G5 formed or provided therein; that a Plat- 1 provision of two strong" crossed braces B internally of said frame and vertically-arranged screw 9' extends through and engages the nut and that said screw at its lower end, below the jack-frame, bears upon the ground-engaging base or foot 9 of the brace; that said screw at its upper end, above the engaging nut is operativelyprovided with a pulley g and, that the screw is turned in the direction required tocause it to bear downwardly upon foot or base 9 or in the other direction as required to release the base or foot, according as pulley g is retated in the one or the other direction. The extension of frame B below and forward of car A to form bolster Z) accommodates the location of the lower vertical pivotal center o-r axis of the swinging boom low down relative to the body portion of the machine, and this feature, together with the elevated support that said frame B affords for frame 0, renders possible the arrangement whereby the boom can be swung laterally and rearwardly beyond a line at a right angle to the machines body portion, and the boom, when swung rearwardly, as far as practicable, engages or bears against a foot of frame 0, frame B, and adjacent brace, at the junction of said brace and frames, as shown very clearly in Figs. 2 and 3, and the extremely lowlocation of the lower pivotal point of the boom at the same time accommodates the desirable closer proximity of the brace or braces and feet of frame 0 to a line coincident with said pivotal point. v

A rear support for the upper end of frame 0 consists, preferably, of a rod H, (see Fig. 1,) that at its forward end is secured, preferably detachably, by means of a pin H, to an ear 6, formed upon and externally of the rear side of the head or cap e, that embraces and secures together the upper ends of the two bars or beams composing the A-f-rame, and I would here remark that bearing E is preferably a vertically-perforated or hollow lug formed upon and integral with cap or head 6, as shown in Fig. 5. Rod II (see Fig. 1) extends rearwardl y and downwardly from cap or head 6 is secured, preferably detachably, by means of a pin 7L, to a rod or bar 72, that extends in I over the rear truck and thence extends to and overlaps or books ever the rear end of the car, as at 7L2.

A-frame C is preferably horizontally hinged or pivoted at its lower end or feet to frame B, as at C,.so as to render it capable of being swung in a vertical plane longitudinally of the machine as required to lowerit out of :the way upon/detaching rods (2 and H therefrom preparatory to transportation or shipment of the machine. i

C (see Figs.'1 and 3) designates a chain or cable for raising and loweringframe C. Chain C is attached at one end to and preferably near the central portion of frame 0, thence leads rearwardly to and over a sheave C suitably supported from the forward end of the under and abuts the under side of the bolster through the floor of car A, and below said floor top of car A, and thence rearwardly and downwar'dly into operative engagement with a winding-drumC, loosely mounted upon a horizontal shaft M, suitably supported from and arranged transversely of the ear. Shaft M is driven, when operated, continuously in one direction in any approved manner, and a suitably-operated clutch 0 controls operative connection between drum C and the shaft.

A washer J (see Fig. 5) rests upon the upper end of 'lug E and overlaps and prevents upward displacement of collar d andis suitably held in place. \Vasher J upon its under side is preferably provided with any suitable number of lugs or projections J, projecting downwardlyinto lug E and preventing lateral displacement of the washer.

The means employed for retaining washer "J in lace vcrticall com rises )referablv the following elements: an upright eyebolt K, arranged with the screw-threaded portion of its shank uppermost and extending vertically through cap orhead e; a nut or nuts K mounted upon the bolts shank at the uppei sideof the 'asher; a chain K attachd atits upper end to the eye of the bolt and arranged in line with the axes of the boom andsccured at its lower end to a bracket L, secured to the upper side of the turntable. (Sec'hig. 1.) Chain K also performs the function of preventing the A-frame (J from being thrown backwardly when the boom swin rearwardly more than a quarter-turn. Said chain does not interfere with the operation of the turn-table, but merely twists when the table turns.

o prevent the bolt K from turning upon the twisting or turning of chain K and thereby avoid loosening of washer J apd nuts K, I make the bolt-en gaging hole 6 in the top of head 6 and centrally-of thelower end of lug or bearing E angular, as shown more clearly in Fig. (l, and make the bolts portion that extends through said hole correspondingly annular in cross-section. v

(see Fig. 2) designates the two turn-table-actuating chains or cables that are attached to the table in the usual manner at opposite sides, respectively, of the boom and lead rearwardly and operatively engage different winding drums F F respectively, looselymounted upon opposite ends, respectively, of shaft M, and a suitably-operated clutch F is provided for each of said drums for establishing operative connection when desired between the respectivedrum and shaft.

N (see Fig. 1) represents the excavating dipper or shovel of the machine, N its bail, and N its handle or arm provided with a rack N arranged longitudinally of the arm and meshing with a pinion N suitably supported from the central portion of the boom and driven in any approved manner, and it,i s obvious that the shovelis thrust outwardly, as required, to exea'vate or returned inwardly after excavating, according as pinion'N is turned in the one or the other direction.

a (see Fig. 1) represents the hoisting chain or cable that is attached at one end to the shovel-bail, thence leads upwardly to and over a vertically-arran ged sheave a, supported from the outer end of the boom, and thence leads downwardly and inwardly along the boom to and in under a bear-down sheave n supported from bracket L a suitable distance forward of the axis of the turn-table. Sheaven is also arranged longitudinally of the boom,

and from said sheave cable n leads rearwardly to and between the sheaves of a pair of sister sheaves a" at, (see Fig. 3,) supported from bracket L side just forward and'at opposite sides, respectively, of said tables axis, and thence cable n leads rearwardl y and'operatively engages the inding-d rum it", called the hoist ing-drum, and loosely mounted upon shaft M, and a suitably-operated clutch of controls operative connection bctweemsaid drum and shaft. It is obvious that the excavatingshovel is hoisted upon winding up cable a and lowers by gravity upon paying it out from the drum. It will also be observed that the supporting of sheaves n and a from a bracket L, that is secured to the turn-table, accommodates a vertical adjustment of the boom.

The construction of turn-table preferably employed (see Fig. 4) comprises a centrallylocated metallic hub j, rotatably mounted upon the upright -circular lug or bearing b, suitably secured to the forward portion of the bolster forming member I) of frame B, as shown in Fig. l. The boom comprises in the main two beams arranged side by side. The

rear extremity of the turn-table, and their width at their central portion is somewhat less than the height of the turn-table and is gradually reduced toward each'extremity, as shown in' Figs. 4 and 8. To and externally of the upper portion of each plate f 3 is secured the vertical member of an angle-iron f that extends from the forward extremity to the rear extremity of the turn-table. The horizontally-arranged segmental plates f rest upon and are secured to the horizontal 'members of an gle-irons f Plates f form the up? per surface of the table around the latters foot of the bottom.- A vertical opening 1,

rps tending downwardly through and forward of the tables hub is thus formed, and the boom extends downwardly through said opening into pockets f Plates f have their outer l edges concentric with the tables axis. segt-he reception of the Two vertically-arranged hub and at opposite sides, respectively, of the and arranged horizontally side by mental band f resting on edge upon the up- -m with a sprocket Wheel M, operatively per surfaceof plates f a suitable distance mounted upon shaft-M. Asuitably-operated from the latters outer edges and arranged clutch g is provided for each drum and eon- 7o concentric with the tables axis, extends from trols operativeconnection between the re- 5 one side of opening f around the table tothe spective drum and drum-supporting shaft, opposite side of saidopening. The upper surand it is obvious that pulley-g and consefaee of plates f at the outer side of band f quently screw g, is turned in the one direcforms a seat for the table-actuating chains. tion or the other, according as operative com 75 Said band is held firmly in place by augle- 'nection is established between shaft m-and o platesfi, arranged at suitable intervals along theone or the other drum. Chain g leads theinner'surfaceof the band and mature forwardly from one of the drums to and over the band and band-supporting plates. To the a horizontally-arranged sheave g suitably outer side of the central portion of each plate supportedfrom'and below the floor of car A, 80

f, below the angle-iron f ,'engagin'g said thence forwardly and laterally to and over plate, is secured a vertically-arranged plate pulleyg thence to and over aguide-shea-ve f, that extends below said plate 1" and'is se- 9 supported from the car-floor in close proxcured at its lower end to the adjacent lug or imity to sheave g and thence to the other enlargement f of the hub of the turn-table. winding-drum. Two diagonally-arranged braces f f are ar- I would remark that the raisedframe or ranged at opposite sides, respectively, of the platform 13 forms 'a'support as near the fortable, and each brace f is secured atits lower ward end of the machine as practicable for end to the adjacent enlargement of the tables the external braces and A-frame and at the hub and-at its opposite or upper end to the same time accommodates-a desirable distance 9'0 outer portion of the plate f above it. between the upper and lower points of c0n- The construction of turn-table hereinbenection of the braceswith the excavator, and, fore described is not only exceedingly si nfurthermore, accommodates a shortening-of ple and durable, but accommodates placing the A-frame, so as to render the latter stifier ofthe foot of the boom well down into the taand require less trussing; also, the raised 95 ble and has the latter extending well up on frame affords a most convenient stand for the v .30 the sides of the boom, so that the boom-swingoperators-the engineer and dipper-tender.

ing chains are rendered capable of exerting In fact, the. operators, as they stand on the their work upon the boom'a desired-distanceraised frame or-piatfollii,are'in plain view of from the booms lower or inner extremity. their work'and out of danger. v 100 To tie together the tables portions at the sides What I claim is of opening 1 and at the same time prevent 1. An excavator comprisinga body portion damage to the table should the boom aeciden- A, a suitably-actuated turn-table supported tally fall, I connect said table portions to at the forward end of the body portion, the gether by abolt O, that extends through openboom operatively connectedwith said table, I05 ingf and through upright slots f in plates a raised frame or platform B overhanging 40 f 3 and angle-irons f and has hearing at or the rear portionof the turn-table, the so-called near its ends in plates or washers P, secured A-frame mounted upon the forward porto the outer sides of angle-irons f respection of said raised platform or frame and contively, by means of two rivets P. VVashor nected with the boom, and the external braces x to Pat the headed end of the 'bolt is interposed having their upper portions receiving their between the bolts head and adjacent anglesupport near the upper or forward portion of iron ffland washer Pat the opposite or threadsaid raised frame or platform, and the lower ed end of the bolt "s interposed between a nut portion of said braces receiving their support Q, mounted upon said end of the bolt and the near the lower part of the-machines body :15 adjacent angle-iron f Slots f in plates f portion, substantially as set forth.

and angle-irons f are open at their lower 2.'An exeavatorcomprisingabodyportion; ends, and hence the boom, should it fall a'ca suitably actuated turn-table supported at cidentally, would deliver a blow. upon bolt 0 the forward end oft-he body portion; theboorn and shear rivets I", and thereby free the bolt or crane; a braced platform or frame overs I20 to drop with the boom through opening f hanging the rear portion of the table; the A- without incurring any damage to the turnframe mounted upon said overhanging'framo table. r I or platform; a connection between the boom Referring again to the operation of the screw and A-frames upper end, and the parts being 9 of either one of the machines external so arranged that the boom shall be capable of :2 5

braces, it will be observed that pulley 9 upon swinging laterally and rearwardlyof a line said screwis operativelyconnected byachain arranged at a right angle to the machines or cable 9 (see Fig. 3) with different windbody portion, and, in said rearwardly-swung ing-drums g g, respectively, looselymounted position, shall engage -or abut the A-framo uponahorizontal shaft on, arranged rearward and A-frame-supporting platform or frame, of and parallel with shaft- M and supported substantially as set forth.

.6-5 from and below car-.body'A, A sprocket- 3. An excavator comprising a-bodyportion wheel; t, operatively mounted upon shaft m, A, as'uitably-actuated turn-tabIeFsupported isdnelh fivelyconneeted by means of 'a chain at the forward end ofgthe' body-portion, the

,boom or crane, a rigidly-braced platform or frame overhangingthe rear portion of the talaterally and externally,

'spectively, of the body portion;

his, the so-called A-frame C mounted upon said overhanging frame or platform, a connection between the boom and upper end of the A-frame, and the arrangement of parts being furthermore such that the boom shall be capable of swinging laterally and rearwardly of a-line arranged at a right angle to the machines body portion, substantially as shown, for the purpose specified.

4. An excavator comprising a body portion A; a suitably-actuated turn-table F placed low down relative to, and suitably supported at the forward end of, the body portion; the boom or crane; a rigid platform or frame overhanging the rear portion of the table; the

so-called A-frame O mounted upon said overhanging frame. or platform; a suitable connection between the boom and upper end of the A-frame; an external and late'ralbrace of said overhanging plat--" and the arrangement of parts arranged at the side form or frame, being furthermore such that the boom shall be capable of swinging laterally and rearwardly of a line arranged at a right angle to the machines body portion, and, in said rearwardly-swung position, shall engage or abut the brace, A-frame, and A-frame-supporting platform or frame, substantially as shown, for the purpose specified. v

5. An excavator comprising a body portion A; a suitably-actuated turn-table F suitably supported at the forward end .of the body portion; the boom or crane ;arigid platform or frame overhanging the-rear portion of the table; the so-called A-frarnei Gmounted upon said overhanging frame or platform; a suitable connection between the boom and upper end of the A-frame, and a brace or braces, for bracing said overhanging platform or frame and connected with the upper and lower portions of said frame or platform, substantially as set forth.

6. An excavator comprising abody portion A; trucks (1. a supporting opposite ends, re-

a rigid raised platform or frame B'erected at the forward end of the body portion above the forward truck, and having its lower portion extended forwardly to form a bolster I) over said truck; the suitably-actuated turn-table supported from a forward extension of said bolster, and

I 'having its rear portion overhung by the upper portion of said platform or frame; boom or crane; the so-calledA-frame mounted upon ,said upper portion of the table-overhanging frame or platform, and a suitable connection between the boom and upper end of the A- frame, substantially as set forth.

7. The combination with the car or body portion, rear truck, bolster over said truck,

' and suitably-supported so-ealled A-frame,

at or near the forward end of the body portion, of a connection between the upper end of said frame and rear end of the car, said connection extending from said frame downwardly and rearwardly to and in under the aforesaid bolster and thence to and hooks over or overlaps the rear end of the car, substantially as shown, for the purpose specified 8. The combination of the car or tion; rear truck; bolster over said truck; metallic bar or strap extending in under and forwardly of the bolster, and rearwardly thereof body porl to and over-hooking or overlapping the rear end of the car; the so-called "A-frame at or near the forward end of the car; the metallic cap oihcad embracing the upper end of said f rame 'ind having a rearwa'rdly-proj ecting ear or meinber; the rod II arranged between and detachably secured to said rearwardly projecting member of the aforesaid head and the forward end of the aforesaid strap or bar, substantially as and for the purpose set forth.

9. The combination with the swinging boom; so-called Aframe; the cap or head 6 embracing the upper end of said frame and provided, at its upper end, with the verticalcylindrical lug or hearing E having a seat E at its lower end and externally, and the connection between the boom and said bearing and terminating, at its inner end, in the sleeve. or collar (1 engaging the aforesaid seat and embracing the lug: of the washer J mounted upon the upper end of the lug and overlapping the collar, and means for holding said washer in place, substantially as set forth.

10. The combination with the Inachines body portion, turn-table, boom, so-called A- frame, connection between the boom and upper end of the A-frame, tween said frames ranged substantially as indicated,of a chain or twistable connection K between said frames upper end and the turn-table, substantially as v V and for the purpose set forth. 11. The combination with boom; the A-frame provided, at its upper end,

with the vertical cylindrical lug or bearing E having a seat Eat its lower end andexternally, and-the connection between the boom and said bearing and terminating, at its innor end, in the sleeve or collar (1' engaging the aforesaid seat and embracing the lug; of

the upper end of the the washer resting upon H lug and overlapping the collar, a-mernber bearing downwardly upon chain or twistable connection between the and connection be .J n upper end and body perv tion rearward of the frame, all relatively ar- 95;

the swinging said washer and a boom at ornear the latters lower pivotal center, and iheafores'aid bear-down member, substantially as and for the purpose set forth. 12. The combination with the machines body portion; turn-table boom; so-called A- frame, connection between the A-frames upper end and body portion rearward of said' frame; the cap or head 6 embracing the up per end of said frame and provided with the r 36 upwardly-projecting vertical cylindrical lug E and the shoulder or seatE atthe lower end of said lug; the connection and upper end of the A-frame and terminat-' ing, at its inner between the boom end, in a sleeveor collar em upper end and body portion rearwardly of end of said lug; the connect-ion between the ble of resisting a blow delivered thereon by ported boom, and boom-swinging turn-table bracing the aforesaid lug and resting upon ing upon the washer, and a chain extending I 'lar embracing the aforesaid lug and resting pose set forth.

the aforesaid seat; of a washer J resting upon said lug and overlapping said collar; an upright bolt centrally of said lug and arranged with its shank projecting above the lug; a member upon the bolt-shank above and hearfrom the head of the bolt tothe turn-table and suitably connected at its upper end and lower end to the bolts head and'table, respectively, substantially as and for the purpose set forth.,-.

.18. The combination with the machines body portion; turn-table boom; so-called A- frame; connection between the A-frames said frame; the cap or head 6 embracing the upper end of said frame and provided with the upwardly-projecting vertical cylindrical lug E and the shoulder or seat E at the lower boomand upper end of the A-frame and terminating, at its inner end, in a sleeve or col- 14. The combination with the suitably-supported boom, and boom-swinging turn-table having, in its forward side, an opening engaged .by the boom, which opening extends downwardly through, and forwardly to the forward extremity of the table; ,of a safety bolt or member extending across the opening below the boom and instrumental in tying together the por ions of thetable at opposite sides of said opening, and said safety-bolt'or connecting member having'a support incapathe boom should the latteraccidentally fall, substantially as and for the purpose set forth.

1 5. The combination with the suitably-suphaving, in its forward side, an opening engaged by the boom, which opening extends downwardly through, and forwardly to the safety bolt or member extending across said forward extremity of, the turn-table: of a Y opening'below the boom and instrumental in tying together the portions of the table at opposite sides of said opening, and the holes in the tables members through which said safety member extends being elongated downwardly and open at their lower ends, and the two platessu portingopposite ends, respectively, of the be t,'and riveted to the adjacent portions of the turn table, substantially as shown, for the purpose specified.-

16. The turn-table in amachineof the character indicated, composed of the cent-rallylocated hub having a pocket or pockets for the reception of the boom; two vertically-arranged plates f f arranged between the rear and forward extremities of the table and at opposite sides, respectively, of the hub; horizontally-arranged segmental plate'sf forming the upper surface of the table around the latters hub; the angle-ironsf the segmen-' tal band f angle-plate s f plates'f", and

braces f al-l'arranged and secured in place,

substantially as shown, for the purpose specified.

17. In a machine of the character indicated, the combination with the upright screw adapted to bear upon the base or platform of an external brace of the n ia 3h 1fg d 51W tienarynutrengagingsaid screw: of a'chainpulley operatively mounted upon the screw; a suitably-driven shaft supported below the car-body;- two drums loose upon said shaft;

a clutch for each of said drums for control ling operative connection between'the respective drum and shaft, and cable operatively.

engaging the different drums and leading from one of saiddrums to and over the pulley and thence to'the other drum, substanstantially as and for thepurpose set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this 19th day of.l ebruary, 1896.

I GEORGE w; KING.

Vtitnesses:

FRANK. A. HUBER, S.- 0. BowEN.

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