US1784963A

US1784963A - Track-shifting apparatus

Info

Publication number: US1784963A
Application number: US365319A
Authority: US
Inventors: Grover J Holt; Longevin Wilfred
Original assignee: RECLAMATION Co
Current assignee: RECLAMATION Co
Priority date: 1929-05-23
Filing date: 1929-05-23
Publication date: 1930-12-16
Anticipated expiration: 1947-12-16

Description

Df- 16, 1930. G. J; Hol- T ET AL `1,784,963

TRACK 4 SHIFTING APPARATUS Filed May 23, 1929 5 Sheets-Sheet l Dec. 16, 1930. G. J. HoLT ET AL. 1,734,963

TRACK S-HIFTING' APPARATUS Filed May 25, 1929 5 Sheets-Sheet 3 u Pf3 1N VEN TOR. @wf/E J #n r N /f By and h//L FRE@ aw/fm Dec. 16, 1930.

` G. J. l-loLT E1' AL TRACK SHIFTING APPARATUS Filed May 2s, 1929 5 sheets-sneet 4 A TTORNEYJ Dec. 16, 1930. G. J. Hour ET AL '1,784,963

TRACK SHIFTING APPARATUS Filed may 23. 1929 5 sheets-sheet 5 Patented Dec. 16, 1930 1,78 ,ses

'en'ovnn J. HoLr AND winrar-m LoNeElviN,

oiiycitosBY, i/iiNNEsorA, AssIeNons, BY

. 'MESNE ASSIGNMENTS, TO THE RECLAIIATION COMPANY; 0F ST. PAUL, MINNESOTA,

A coR-roRArroN or vDrmiwiiai:

A- rr'RAcK siiir'rINe APPARATUS Application filed May 23, 1829.@Seria1 No. 3G5,319.

'lhis invention relates to track shiftingmachines, and has reference more particularly to machines for this purpose employed in open mining and other extensive excavating operations. Vith machines of this class the track-israised from the road bed and shifted laterally in a step-by-step movement, as'v the car carrying the'shifting mechanism is r`run from one-section of track to another.'

Heretofore, machines used for this purpose have been provided with a tiltable thrust boom for raising the track and car upon apedestal, and lateral movement of the track :has generally been produced by shifting the rposition of the boom with reference to the car, .which is held clamped -to the tracks. The

boom is operated mechanically andis allowed angular movement by mounting it in a sleeve which is pivotally supported., Transverse motion is allowed by'mounting the boom upon a carriage that maybe'moved from oneside of the car to the other. TheI lowering and raisins of the boom is accomplishedby means of a gear engaging a rack on the boom. y

Track vshifting machines of the type described have alwaysbeen attended with certain disadvantages which it is the object of this invention to overcome. Among the disadvantages `maybe mentioned the following: excessive strains upon certain parts of the operating mechanism, such as the teeth on the `boom rack, which results in frequent breakage and repairs; excessive shocks due to Jerky operation of the boom mechanism,

r resulting in short life to the machine and increased cost of operation; lack of accurate alignment in the shifted track, due to diiiiculty of close control of the boom mechanism.

In order to cure these defects applicant proposes generically to employ compressed air or hydraulic pressure apparatusinste'ad fof mechanically operated mechanism, as `there are certaindefinite advantages in the use of compressed air, or alluid,iover purely mechancial mea-ns to accomplish track lifting. For example, a fluid cushioning eifect is secured, which is impossible lby mechanical means alone. Another'advantage liesinA the fact that there are no teeth on the boom which can be snapped oil" `due to sudden over-r stress. y A further advantage is the more flexible Vand veasily controlled application of power to thebperating mechanism, which greatly facilitates accurate operation.

We areaware that pneumatic andhydraulic jacks have heretofore been used in connectionwith track lifting, and ballasting machines Vwhere the object is merely .to lift thetrack vertically, but, so Vfar as weare aware, no one has heretofore attempted to `solve the problem of track shifting by the use of fluid-operated mechanism for this purpose.

vi-in `object of this invention is to provide a track shifting machine that operates without excessive shocks operating mechanism.

A further object of thisinvention isto` pro- Y vide a tracl'r'shifting machine in which the power is i'iex'ibly connected and applied to the operatingmechanism.

A further object is to provide Va device of this character wherein the rately controlled.

A still further object of ourinvention isto f provide a track shifting machinewhich is simple, durable, efficient and economical in operation. c y

p A further object is to provide in a device of this kind anleflicient 'and easily operated `mechanism to lirmly clamp the carto the rails and to release said car from the'rails.

More specifically, it is our object to provide-a track shifting machine comprising a self-propelled `car adapted to travel-on the vention consists in the parts andcombinations to1be hereinafter set forth and claimed,

with theundersanding that the several necessary elements comprising our invention may be varied in construction, proportion, and arrangement, without departing from thev spirit and scope ofthe appended claims.

ln' order to make our invention more clearlyl understood, wejhave shown-in thefaccomand strains upon .the` Q power is gradually applied, andthe operating mechanism accupanying drawings means for carrying the same into practical eect, without limiting the improvements in their useful application to the particular' constructions, which, for

sections of one of the clamp mechanisms'inV clampedA and open positions, respectively. Figure 6` is a side elevation of thesame.

' Figure 7 is a plan view of thepipe layout showing connections from pressure tank to operatingcylinders. i v A Figures 8, 9, 10 and'll are horizontal sectional views of the' "fluid control valves in `various operating positions.`

Figure 12 is a vertical section of a fluid control valve. y Y

Figure 13 is a vertical longitudinal section of the thrust boom cylinder and associated` mechanism. Y

Figure 14V is a diagrammaticsection showing the relative positions of the several principal elements during the operationof shifting a track.

Figure 15 is a plan view of the pipe layout showingA connections from the tank to the l operating cylinders for a liquid pressure system.

Referring by numerals to the drawing,

Vwherein the Asame elements are designated by like symbols throughout, 1 designates a steel frame flat car, adapted to travel upon standard ornarrow gauge tracks 2, and upon which are mounted all the necessary machinery to laterally shift said tracks. l

Securely bolted to car 1 is an internal combustion engine or other prime mover 3, having secured to its crank shaft a driving sprocket 4 connected by chain 5 to a driven sprocket 6, which is in turn connected through a clutch 7 to a counter-shaft 8. On the other end of shaft 8 is a driving sprocket 9 connected by a cha-in 10 to a. driven sprocket 1l, which is fixed on the main shaft of a multicylinder air compressor 12 provided with the customary overload relief valve 12a. Pipe 13 connects vthe compressor to a pressure tank 14, from Vwhich a pipe 15 leads to

control valves

16, 17 and 18: Pipe 19 is 'connected with the exhaust outlet of each of the valves and serves as an exhaust manifold. This pipe may exhaust directly 'into the latmosphere or into the ratmosphere through a suit-able exhaust-modifying device.-

Flexible pipes

20 and 21 connect valves17 and18 with main cylinder 22, and

pipes

23 and 24` connect Y couplingy 13.

valve 16 with the four auxiliary cylinders 25. `(See Figure 7 Vhen the track shifting machine is in 0pera-tion, prime mover 3 is in constant motion, and when it is desired to secure air pressure for the operation of main cylinder 22 .and auxiliary cylinders-25, clutch 7, through its operating lever 7a, is caused to engage shaft 8 to sprocket 6 and power isthus transmitted from prime movery 3 to compressor 12, which furnishes'the desired' air pressure to tank 14 and the

operating cylinders

22 and 25.

described with-air as a working fluid, we wish Whilethe fluidpressure system has been v it to be clearly understood-that liquids may Y beadvantageously employed. Such a sys- 'tem employing liquid as a' working fluid is disclosed in Figure 15 where a liquid' pump c V 100, of 'any suitable design, has its low pressure` or intake connected with a sump or tank'14 by means of thev pi 3e lineV orother Liquid fromk the tank 14, which is under substantially atmospheric pressure is forced from the pump'through pipe 15 to the

valves

16, 17 and 18. Pipe 19 is connected with the exhaust outlet of each ofthe valves and the tank 14 so that thev exhaust fluids are returned thereto. As in the case of the pneumatically operated mechanism,

suitable pipes

20 and 21

conyneet valves

17 and 18 with the lifting cylinder 22, while

pipes

23 and 24" connect valve 16 with the four auxiliary cylinders 25. For the purpose of yproviding pressure relief means between the high pressure side of the pump and the sump a suitable by-pass 101 is connected to the line 15 adjacent the pump discharge end and to the sump.

The pump is driven in a manner similar to that employed for the air compressor. Upon the driven shaft' 102 of the pump is mounted a sprocket similar to the sprocket 11,"previously` described; By means of the sprocketchains and couplings disclosed in connection with Figures 1 and 2, the sprocket secured to the pump shaft may be rotated so as to actuate the pump.

Slidably keyed tov one end Vof the main crankshaft of prime mover 3 is a fly wheel 26, .having a smooth face 27 held in frictional contact with driveny wheel 28 by a Vlever 29 pivoted near its center to cary frame 1,and engaging at one end with collar 30,

31 causes fly wheel'26 to be brought into and out offrictional engagement with driven gwheel'28, which is slidably keyed to counter- 'shaft 32, along which it is moved by operlating lever 33 through a system oflinks engaging collar 34 on wheel 28. It is obvious that thev movement of wheel 28 across the face of fly wheel27 causes changes of speedl iii?) llU CTI

in wheel 28 andwill-alsoreverse the-direc` tion ofits r'otation when it is shifted past the center of Wheel 27; Y 4 e Shaft 32 at its freeendcarries a crown gear 35, which meshes with al similar gear 36 fixed to a counter shaft 37, on'which are' slidab'lyV keyed a plurality of clutch collars 37 and 38, which are moved in unison along shaft 37 by a yoke 39attached `to an operating lever 40. As willbe seen in Figures 1 and 2, clutch collars 37 and 38 are .adapted to alternately Vengage similar collars 41 and 42, fixed respectively tosprockets 43 and 44 upon shift of yoke 37 by lever 46. Of course, when `the yoke isin neutral'position, there will be no engagement between any ofthe Lclutch collars. When collar 37 is Vengaged with` collar 42, (as in Figure 1), power is transmitted from prime mover 3 to sprocket Y 44, and from thence through

chains

45 and 46 to screw shafts47. As will be seen in ures 1 and 3,4screw shafts 47 are journaled atl their ends in the frame of car 1and are engaged intermediate their ends by threaded sleeves 48, integral with standards49, which are slidably mounted on cross beams 50 rigidly fastened to frame of ear 1;

rlhis invention further contemplates the substitution of the coupling clutches herein- 1 before described; by friction clutches. In

either event the clutchlactuating mechanism.V

may be either manually or mechanically operated, such as-by associating fluid pressure operated means with the actuating mechar: nisin.

pinion 52 is caused to travel over rack 51 and rotate cylinder v22 about its trunnions 55, which are journaled in the upperpparts'of standards 49. i

`lihen collar 38. is engaged'with collar 41, power is transmittedfrom prime mover 3 to sprocket 43, and thence through chain 56 and sprocket 57 to one pair of wheels of car 1,

which serve to propel the car along tracks 2.

Mounted in cylinder 22 is a close-litting air-tiglit and liquid-tight piston 58, to which is attached a piston rod 59, which passes through a stuffing boi? 60 in the lower end of cylinder 22, and has pivotally secured to its freeend a shoe 61 with corrugated face 62.

lfvhen valves

17 and 18 are turned to the positions indicated in Figures 11 and 13, com- Y pressed airifrom tank 14 flows through

pipes

15 and 21 to the lower raising the piston 58 to the top of the cylinpart of cylinder 22,v

der, as shown. TheL air above thev piston es-v i capes through pipes v2O and19 and valve 63A into the outside air.

f'valves V17 and 18. are now turned as shown in Figure 10,'the flow of air to andv from cylinderC 2 is cut olf and piston 22 will remain inthe position shown in Figure 13.

f

valves

17 and 18 are now turned as shown in Figure 9, air will enter the upper part of cylinder22, forcing piston 58, rod 59 and shoe 66 downward until'slice 60 engages with the ground between the ties of track 2, as shown in Figure 14.

1f valves

17 and 18 are still left in the position shown in vFigure 9, piston 58 will continue to` descend in `cylinder 22, and

then reaction of shoe 62 on the ground will raise car 1 therefrom. The travel of piston 58 can be arrested at any time and in any po.- sition desired and heldin such position for any desiredlength of timeby turning valvesr 17`and 18 to the position shown inFigure 8 and cutting oil the supply and escape of air to and from cylinder 22.

1t obvious that when the liquid pressure system of Figure 15 is employed, upon the valves -17 and 18 being positioned as described in connection with'the similar valve-

s

17 and 18 used with the compressed air system, the piston 58 within the lifting cylinder willbe similarly.controlled.v In this instance, however,instead of the fluid being exhausted into the atmosphere, it is returned through the exhaust line 19 to the sump 14 and recycled;

Each auxiliary cylinder 25 contains an airtight piston 64, rod 65, which passes through a stuling box in the lower part of cylinder 25 andis attached by a yoke 66 to a pair of pivotally mounted tong clamps 67 and 68. Links 69 and 76 connect clamps 67 and 68 to lifting bar 71, which surrounds piston rods y and is` slidably mounted in theV frame of car 1; i v

Lifting bar 71 is provided at its upper end with a heavy, annular flange 72, which en-` gagesiwith frame of car 1 when in lowermost position, Vas in Figure 4. When, however, piston rod 65 is retracted' until tong clamps 67 and 68 are wide open, (as in Figure 5), further retraction of piston rod 65 results in raising bar 71, asshown in dotted lines in Figure 5, so that clamps 67 and 68 completely clear tracks 2 when car 1 is traveling thereon.

rllheoperationnfclamps

67 and 68 is controlled by valve 16, which admits compressed air from tank 14 through pipes i 15 and 23 and 24 toy cylinders 25. llVhen valve 16 is turned to the position shown in Figure 11, air enters the tops of cylinders 25, depressing piston 64 and rods 65, and causing

clamps

67 and 68 to embr ce the balls of rail 2, the air in the lower part of cylinders 25 Vescaping through pipe 19. If valve 16 is' now turned to which is attached. a piston 4from entrance Yand exit from cylinders 25,

causing piston rods 65 to remain in lowermost position, as shown in Figure 4.

If valve 16 is now turned as shown in Figure 9, air enters the lower ends of cylinders Q5 through

pipes

15 and 24, raising piston rods 65 to position shown in Figure 5, and when valve 16 is turned as shown in Figure 8, this position is held. When piston 65 and clamps 67 and 68 are in position shown in Figure et, and air is admitted to main cylinder 22, depressing` piston 59 and raising car 1, it is manifest that the frame of car lengages the iianges 7 2, and through bars 71 and clamps 67 and 68, also raises track without causing any stress on piston rods 65.

`When the liquid pressure system of Figure 15 is used, positioning of the valve 16 in a manner similar to that described in connection with the valve 16 will cause the track clamps to be controlled as described above.

As will be appreciated bythe foregoing description, our invention contemplates broad- .ly a machine for raising or shifting the position of tracks, either standard gauge or narrow gauge, by means of compressed air or hydraulic cylinder. The machine consists mainly of a power unit, (prime mover), air compressor or hydraulic pump with a receiver or liquid tank, compressed air or hydraulic cylinder, and such accessories as are necessary to accomplish the results stated above.

In our improved track shifting machiney the car, platform, or mounting is` attached to they rails by track clamps.` These track clamps are-operated by means of a control valve in such a Way that on moving the valve lever in one direction, the track clamps are lowered into place and clamped to the rails, and when the lever is moved in the opposite direction, the track clamps are released from the rails and raised upward for the purpose of avoiding obstructions when traveling. The unique feature of our track clamps is that by means of one lever lthe clamps may be loweredV and attached to the rail, and the same lever furnishes the means of detaching the clamps from the rail and raisingthem up. Another feature of these clamps is that the greater the weight to be lifted the greater the clamping power exerted, also no strain of lifting is transferred to thelever mechaiii-sm used for raising or lowering.

The power unit (prime mover) is connected to the air compressor or hydraulic pump either directly or by chain, gears, belts, clutches or a combination of these so that the air compressor or hydraulic pump may be stopped even though the power unit be left running. This air compressor or hy- In the case of compressed air, the air is compressed by the usual method and delivered under pressure to the air receiver or reservoir. From this reservoir a pipe line or lines leads to a system of operating valves operated separately or together in such a way that the air or liquid may be delivered to either top or bottom of the cylinder, raising or lowering the piston and piston rod therein and by this means raising or lowering the track upon a supporting shoe. These saine valves may be used also to close the openings leading to or from 'the top or bottom of the cylinder so that the track, after being raised, may be held in place, or by further manipulation of these valves the top or bottom openings in Vthe cylinder may betank and through the pump discharge delivers the liquid through a pipe or pipes to the operating valves. These `valves are theninanipulated ,in the manner described, for raising, holding, the only difference between the compressed air and a hydraulic system is that where with compressed air the exhaust ports are openedl to the atmosphereina hydraulic system the liquid is returned to the liquid tank by means of a pipe or pipes and is not exhausted.

In order to facilitate the raising of either one side of the track at a time, raising both sides together, or raisingand shifting the position of the track, the cylinder isV mounted upon the car in a carriage, `which is caused to slide at right angles to the track direction by means of ordinary worm' type screws, which in turn are operated by the prime mover through shaft gears, belts, chains, or clutches, or a combination of these, so that the direction of sliding of rthis carriage may be reversed to place the cylinder in any position within the limits of the worm type screws.

The cylinder may be tilted at any angle by means of a hand wheel and gear attached to the cylinder by a pin, upon which the hand wheel and gearare free to revolve together. The gear engages in teeth cut in the top of the carriage, V.thus causing a tilting of the cylinder by revolving the `hand wheel in either direction, since the cylinder is attached to the carriage by means of pins which are free to revolve in bearings.

The car, platform, or mounting to which this equipment is attached is to be propelled in either direction by means offa transmission of `power through shafts, gearsbelts, chains, or clutches or a combination of these.

The car, platform, or mounting, in case of the use of wheels, may be equipped with hand or foot controlled brakes, which may be acor shiftingthe track, and

tuated either manually of by means of a fluid is thenslid intoproperposition as described above andthe cylinder giventhe correct an-` gle of tilt for the raising or shifting by means of the hand wheel. `By means ofthe operating valves,vair. or liquid,y as the case may be, is forced into-the top of the cylinder, causing the plunger and shoe -to descend, and this in turn raises the track together with the car, platform, or mounting. By the correct angle of cylinder tiltrand placing of the cylinder carriage the track may be raised on either side, bothv sides together, or may be shifted to, either side through the com bined efforts of the cylinder and the forces of gravity- After the trackhas'been loweredA or shifted, the machine may be movedto a new position. Figure 14 shows the relative' positions assumed bythe principal elements of our machinein shifting a `track from right to left. v

It is apparent f romthe above description that our pneumatic ;or hydraulic valves afforda means ofl carefully controlling the movement and operationof our machine so as to avoid a sudden jerk, shock or jar such as arecommonly. encountered in mechanically operated machines of this kind. This not `only enables the-operator to more accurately align his shifted trackbut adds greatly to the life of the machines and avoids e breakage ldue tosudden loverstress of vital arts.

The cushioning effect' of fluid pressure Y operation greatlyfacilitates these beneficial results. v y

, While we ,have shown and described the preferred embodiment of ourfinvention, we

wish it to be understood that we d o not con? fine ourselves to the precise details of con-` struction herein set forth, by way of illustration, as it is apparent that many changes and variations may be made thereinby those skilled -in the art, without departingV from the spirit of the invention, or exceeding the scope of the appended claims A,

We claim: f v n 1. In a track shifting machine, a power source and a fluid pressureactuated track raising and shifting mechanism. Y

2. Ina track shifting machine, a power source and angularly adjustable,'a fluid pressure actuated means for raising and shifting a track. v Y

3. In a track shifting machine, a car having a power source mounted thereon, said car adapted to be securedy to the rails to be shifted, and a fluidpressure actuated means for raising shifting said car and track. l. a 4track shifting machine, t-hecom# bination of a car adapted vto be secured to the-rails tobe'shifted, and an angularly ad-vk Y justable fluid*pressureactuated meansl for i raising and shifting, said car and track.

5. In a track shifting machine, the com-V bination of acar adapted to be secured toithe rails to be shifted, `and a'fiuid pressure ac.- tuated thrust boom adaptedfoA raise and shift saidcar-andtrack.` c'

6.r In 'fa track shifting machine, com;vv v n bination ofa car adapted to be secured to the rails to be shifted, and an angularly adjust? able fluid pressure actuated "thrust boom adapted to'raise and shiftsaid vcar andtrack. 7. In a track .shifting `lmachine, a. car adapted Vto't'ravel onthe tracks to be shifted, meansfor securing said carto said tracks, fluid pressure actuated means for operating said lsecuring means, and means for lifting` said car and track without. exerting .strain upon said operatingmeans.

.. 8: In a track shifting machine,` a car adapted to travelon the tracks to 4be' shifted, Y

meansfor securingsaid cartosaid tracks, fluid pressure actuated means forapplying said securingmeans to saidtracks'and` for withdrawingsame vabove said tracks. f

'9; `In a track shifting machine, a railway car,`mean s to clamp same tothe rails upon which it rests, a fluid pressure actuated thrust boomjpivotally and s lidably mountedlo'n said car, and means to angularlyL adjust said boom.

10. .Ina trackpshifting machine, a railway caiyfluid pressure actuatedclamping means` sov carried thereon adapted to firmly secure said car to the track upon which it rests and fluid pressure .l actuated means g for raising vand shifting said car and track. f

11. Inga track shifting machine, a railway car, hooks carried by said'car adapted to engage the rails upon which said car rests, fluid pressure actuated means to raise and lower said hooks and to apply andwithdraw them from said rails.` 1 i j 12. Inatrackshiftingmachine, a railway'- car, hookscarried by'said caradapted Vtovengage the rails" upon which said car rests, fluid pressure actuated meansto'raise and lower said hooks and to apply and withdraw them from saidv rails, andmeans'to raise said car and track without applying str-ess to the hook actuating means. c v v 13. In a track shifting machine,a railway car, fluid pressure actuated-means on said car adapted izo-clamp sameyto the rails upon .which it rests,a carriage transversely adjustable car adapted to clamp-saine to the rails-upon which it rests, a carriage transversely adjustableon said car, a fluid'piessure actuated thrust boom pivotally mounted on said carriage, and a prime mover for propelling said car and actuating said clamp means, carriage and boom.

15. In a trac-k shifting machine, arailway car, fluid pressure actuatedineans on said car adapted to clamp same to the rails upon which it rests, a carriagetransversely adinstable on said car, a fluid `pressureactuated thrust boompivotally mounted on said carsaid boom.

riage, a source of power, and powertrans. mitting mechanism to operate said car, clamp means, carriage and boom. Y

16. In a track shifting machine, a railway car, fluidpressure actuated means .on saidy car adapted to clamp same Lto the rails upon which it rests,'a carriage transversely ad` justable on said car, a fluid pressure actuated thrust boom pivotally mounted on said car# riage, a shoe pivotallyattaclied to saidboom, and mechanism to angularlyY move and adjust sure operated means to lift and shift said car and rail-s. v

' 19. In a track shifting machine, a railway car, adapted 'to travel on thef'rails [to be shifted,` hydraulic means to clamp said car to said rails andhydraulic meansto lift and shift saidv car and rails.` f

20. In a track shifting machine, a power source, and angu'larly adjustable, a f luidpresiv sure actuated means for raising a track and holding the same-in raisedposition.

21. In a track shiftingmachine a car hav.

ing a power source mounted thereon, said car` adapted to be secured'to the rails to be shifted, a fluid pressure actuated means for raising said car andtrackcontrolling means for said fluid pressure actuated means so thatthe car and track may be held in a raised position and lowered therefrom when desired.

Q2. A track shifting machine comprising a car havinga power source mounted thereon, said cai" adapted to besecured to the rails to be shifted, a fluid pressure actuatedmeans for raising 'and shifting saidv cai' and track, controlling means for said fluid pressureactuated means so that the carand track may be held in a raised and Ashifted position and may be lowered when desired. j v v 23. A device for clamping a railway car to nected to the free end' of said piston rod, and y a link connecting each tong clamp with said bar. t ,Y c

24. A device for clamping a-railway car to a track comprising a cylinder mounted upon the body of the car, a piston therein adapted to be actuated by fluid pressure, a piston rod and a tubular bar surrounding the same eX- tending through the carfbody, said bar being slidably mounted inthe car body and provided with a lange at-one end ladapted to ki'est'upon the car body when the piston is at one eXtreme position, the other end of said rod being connected by a plurality of links to a pair of tong clamps pivotally mounted on ythe free end of said piston rod.

25. In combination with a track shifting machine `comprising a railway carhavingfluid pressure actuated track raisingand shifting` mechanism mounted tliereon'iiiiid pressure actuated trackQclamps forts'ecuring the carto a track on which it runs,eachY of of said clamps 'comprising a cylinder, a piston and piston rod therein', a pair yof tong clamps mounted upon the free, endV of Veach of said piston rods, and means-forf'opeiiing and closing said clamps upon the movement of said pistons, v

26. Incombination with af track shifting machine comprising aprailway car having fluid pressure actuated Vtrack raising and shifting mechanismfniounted thereon, fluid pressure actuated trackclamps for securing the car 'to a track on which it runs,ec`ah of saidclamps comprising a cylinder mounted vupon the body of theY car, a piston therein,

a piston rod therefor andv atubular bar surrounding-the same extending through the car body, said bar being slidablymmountedzin the car body and provided with aflange atl one end adapted to lrest upon thebodywhenA said piston is at one extreme position, the other end of said rod being connectedbya plural? ity of linksto a pair of tong clamps pivotally mountedgupon' a yoke secured to .the free end of said piston rod, said yoke adapted to bear against the end v.of said bar when the piston is moved away from the car body so as to raise'said bar with said clamps.

y27. A -track raising and shifting machine comprising a car adaptedtobe clamped to the rails on which it runs,"cross beamspositioned transversely of-said car, a standard slidablymounted on each cross beam, a fluid p essure actuated thrust boom mounted between saidV standards, means for adjusting the position of said standards and means for ier `aiigularly `,adjusting the position of said :thrust boom.

.A v, track shifting machine con prising a car adapted to beclamped to the rails on which vit runs, crossbeams'positioned trainsk versely ,of said car, a standard slidably mounted von each cross beam, a cylinder'piw otally mounted 'between said standard, said -cylinder being provided with a piston-and piston rod therefor, pedestal mounted kupon the free end of said piston rod, means upon the car for movingsaid cylinder transversely thereof, said piston-being actuated by fluid pressure to raise and shift the car and track,

29. A track shifting machine comprising a car `adapted to be `clamped -torthe rails on Vwhich it runs, a power source mounted upon said can-cross beams positioned transversely -of the car, astandard slidably kmounted on each cross beam, a Vcylinder pivotally mount ed betweenv said standards, `said cylinder lbeing `provided with a piston and piston rod therefor, a pedestal mounted upon the free end ofsaid piston rod, each of said stand-r ards provided witlra threaded sleeve adaptards, means upon one of said standards for adjusting the angular position of said cylinder, each of said standards being provided with a threaded sleeve adapted to engage a screw shaft rotatably mounted on said car, and means for connecting said screw shafts to said power source so as to rotate the same and move said cylinder transversely of the car, said piston being actuated byV fluid pressure to raise and shift'the car and track.

y3l. A track shifting machine comprising a car, a power source and a liftingcylinder Vprovided with a piston and piston rod therefor, said cylinder being pivotally mounted between standards slidable transversely o f said car, each of said standards being provided with a threaded sleeve adapted to engage a'screw shaft j ournalled in said car, said piston rod being provided with a pedestal for lifting and shifting a track, a plurality of cylinders provided with pistons and piston rods, the latter having clamp mechanism mounted thereon for securing the car to the track on which it runs, means for coupling said power source with said screw shafts so as to rotate the same and adjust the position of said cylinder, and means for coupling said power source with a fluid mounted onsaid car. i y 32.A A track shifting machine comprising a caradaptedto be clamped tothe rails on Y i`7o sure generator, and Huid pressure yactuated which it runs, a power source, a fluid prestrack raising and shifting mechanism mount ed on ,said` c ar, said track raising and shifting mechanism lbeing slidable transversely of the car, means for coupling said power source ,to said track raising and shifting mechanisml so as to positionv the same, means for coupling said power source withsa-id fluid pressure generator so` as to actuate the i same, and `means for coupling said power` source with an aXle of said car so as to propel the ear along the track. v

33. In a track shifting machine, a power source, airl compressor and `compressed airY actuated track raising and shiftingniechanism.

`secured to the rails t0 be shifted, and means `for-'conducting the air .compressed by said pressure generator 34. In a ltrack shifting machine, a cari having a powersou'rce andl air compressor mounted thereon, said car adapted to be compressory to a track raising andshifting mechanism so as to raise track. Y Y I: A i Y j 35.A In atrack shifting`- machine a car havinga power source and an air compressor and shift the car and mounted thereon, said car adaptedto be se-k cured tot the vrails to be shifted, an angularly adjustable compressed air actuated means for raising ,andfshifting said car yand track, and means for conducting air .compressed by said .compressor to said `raising vand shifting mechanism. f

Y 36. A track raising and shifting machine comprising acar adapted to beclamped to the rails, on which it runs, a power source,

air compressor, a tankpand alifting cylinder Vmounted thereon, said cylinder provided with a piston and piston rod, the latter pro vided with 1 a t pedestal i for `raising and shiftthe admission and exhaustion of airtherein, an air inlet Vlinefrom said tank :and an eX- haust .line connectedto each'valve.

37. A track shifting machine comprising a car, adapted to beclainped to the track upon which itruns, a plurality of clamp actuating cylinders,a Amain lifting cylinder having a piston and piston rod provided with a pedestal, a power source, anair compressor and va tank mounted on said car, means for `couj pling said' power source with said comlpresser so as tok actuate the -same, the air con'ipressedthereby being stored in said-tank, a three-way valve associatedvwith each end Of,theliftingcylinden:a four-way valve assoand exhaust line connected'to each of theralves, said valves adapted to control the admission and; exhaustion of air in the cylinders. 'y

3S. In a track shifting machine, a power source, a liquid reservoir, a pump and a hydraulically actuated track raising and'shifting mechanism. 1 q

' 39. In a track vshifting machine a car adaptedto be clamped to the track on which it runs, a power source, a pump,.a liquid reservoir and hydraulically actuatedV mechanis'm for raising and shifting said track and car.

40. In a track shifting machinea car adapted to be clamped to the track on which 'it runs, a power source, a pump, a liquid reservoirand angularly adjustable hydraulically actuated mechanism for raising and shifting said car and track.

4l. In a track shifting machine a car adapted to be clamped to the track on which vit runs,'-a power source, a pump, a liquid reservoir and a hydraulicallyactuated thrust Vboom adapted to raise and shift saidcar and track."

42. Ina track shifting machine a car adapted to be clamped to the track on which it* runs, V"a power source, a pump, a liquid reservoir and an angularly adjustable hy- A draulically actuated thrust boom adapted to raise and shift said car and track.

43. A track shifting machine comprising a power source, a liquid reservoir land pump mounted on said car, means for securing the carto the track on which it runs, hydraulically actuated mechanism for operating said securing means, and means for lifting said mechanism for raising and shifting the car and track,means for couplingsaid pump to said power source, said pump adapted to force the liquid through said raising and shifting mechanism so as to actuate the same, means for returning the liquid therefrom to said reservoir, said pump positioned on the high pressure side of the system, and means for controlling the fluid admission and eX- haustion in said raising Vand shifting mechamsm.

47. in a track shifting machine comprising a car, hydraulically operated track clamps for securing the car to the track on which it runs, hydraulically .operated mechanism for raising and shifting the car and track, a power source, aV reservoir and a pump mounted on said car, means for coupling the power source to said pump, said pump adapted to draw liquid from said reservoir and force the same through said pump to the clamping and the raising and shifting mechanism to actuate the same, means for returning the liquid Jifrom said clamping and raising and shifting mechanism to said reservoir,

and means for controlling the admission and exhaustion of said liquid in the clamping and the raising and shifting mechanism.

In testimony whereof we aiiix our signatures. t

i GROVERJ. HOLT. Y Y WILFRED LONGEVIN.

car andtrack without exerting a strain upon said operating mechanism.

In a track shifting machine, a railway car, apower source, a liquid reservoir and pump mounted thereon, hydraulically actuated clamping means carried'upon said ,car adapted to secure the car to the track upon which it runs, and hydraulically actuated means for raising and shifting said car and track.

45. Ina track shifting machine comprising a car, a power source, a liquid reservoir, a i

pumpk and a hydraulically operated track raising and shifting mechanism mounted upon said car, means for connecting Y said power source to said pump, said pump adapted to -orce liquid through said raising and shifting mechanism so as to actuate the same, means'for returning the liquid therefrom to said reservoir, and means for clamping the car to the track.

46. `In a track shifting machine comprising a caradapted to be clamped to the track on which it runs, a power source, a liquid reservoir, fa pump and hydraulically operated