US1099238A - Controlling mechanism foe hydraulic motors - Google Patents

Description

A. V. T. DAY.

GONTROLLING MECHANISM FOR HYDRAULIC MOTORS.

APPLIOATION FILED JUNE 20,1907.

1,099,238, Patented June 9,1914.

3 SHEETS-BHEBT 1.

WITNESSES INVENTOH A. V. T. DAY.

GONTROLLING mncmmsm FOR HYDRAULIC MOTORS. APPLIOATION FILED JUNE 20, 1907.

Patented June 9,1914.

@llwgflm WITNESSES UNITED STATES PATENT, OFFICE.

ALBERTV. 'r. DAY, or NEW YORK, N. Y., ASSIGNOB 'ro comun HUBEBT, or NEW YORK, N. Y.

con'monmue mucnamsm ron. HYDRAULIC MOTORS.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed June 20, 1907. Serial No. 879,898. 7

To all whom it may com-em Be it known that I, ALBERT V. T. DAY, a

borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Controlling Mechanism for Hydraulic'Motors, of which the following is. a specification, reference being bad therein to the accompanying drawings; forming a Part thereof.

My invention relates particularly to means for governing hydraulic motors which are adapted to operate under substantially constant hydraulic pressure, such, for example,

i as when the hydraulic motors are connected in parallel relation with each other in a conduit circulatory hydraulic power trans mission system, the motors being individually subjected to varying loads, and also required to operate at varying fixed speeds; and the principal object of my, invention is to secure delicacy and accuracy of speed regulation or governing of the hydraulic,

motors operating under such conditions.

Other objects and advantages of my invention will appear from the following description.

My invention comprises improved hydraulic means for determining and regulating the speed of a hydraulic motor, such hydraulic speed-regulating means being controlled by an automatic governor for giving a fixed speed to the motor under varying loads, and the governor in turn being manually controllable so as to change the fixed speed at which the motor operates.

My invention also includes means for employing the above-named hydraulic speedregulating means for reversing the motor independently of and without interfering with the governing or speed regulation of the motor. 3

My invention also includes certain other features and details of construction which will appear from the particular description of the embodiment of my invention shown. Such embodiment will now be described with reference to the accompanying drawings, after which I will point out my invention in claims.

Figure 1 is a side elevation, partly in section, of a hydraulic motor, together with the complete hydraulic regulating mechanism, including" the automatic governor,

mea-ns for reversing the motor. Fig. 1 is a detail view showing the reversing valve 1n its other position or phase from that shown in Fig. Fig: 2 is "a longitudinal central vertical section of thehydra'ulicifim tor shown in Fig. l. Fig. 3 is a transverse central vertical section of the same as viewed from the right. Fig. 4 is a diagrammatic representation of a complete'system, including three hydraulic motors.

The hydraulic motor shown is of the type which consumes variable quantities of liquid per cycle or during a complete series of operations, for example, for each 'rotation of-a rotary motor, according to the amount of load upon the motor or the amount of work that it is required to do and belongsto the particular class of this type'inwhich" the liquid consuming capacity is altered by changing the eccentricity of a rotary piston relatively to its cylinder.

casing comprising the flanged side inclosure or frame 1, havlng downward extensions as form also cylinder heads for the motor. The side inclosure' and the hea'dsare joined together in a liquid-tight manner with intogether by bolts as shown. A rotary shaft 3 passes centrally through the heads" 2 and has its bearings therein made liquid-tight by packing glands. Exteriorlyto the cas ing the shaft 3 carries a gear wheel 4 for.

u gal force.

rectangular block 7 embracing the piston and slidable with a close fit .in the casing" bore of the cylinder is'shown as cylindrical and is oflarger diameter than the-piston,

exclusive of the radially movable terpo'sed gaskets'upon which they are drawn transversely to the axis .of the piston: The

manual governor controlling means and the This hydraulic motor has a rectangular shown forminga' base or support for the motor, and the end pieces orhead's 2 which 7 operatively connecting the motor to any tool The cylinder for the motor comprises a I posite positions of the cylinder.

' the motor.

which in operation are held in contact with the inner surface of the cylinder by centrifugal force. Relative eccentricity of the piston and cylinder to each other in either one of two opposite directions and to a haust ports respectively extend equally in opposite directions circumferentially of the bore of the cylinder, so as to preserve corresponding relations to the iston in the op- The ex,- haust port is of sufiicient width to prevent trapping of the exhaust liquidby the rollers or wings of the piston such as would look The lateral. slidin movement of the cylinder is limited in eaci direction by shoulders or lugs located in the path of the cylinder, and shown as formed integrally with the frame 1.

It is evident that the direction of rotation of the piston will be changed by shifting the slidable cylinder from one side to the other of the piston. If a motive liquid be supplied to the motor at a constant pressure or at a pressure that does not vary so widely as to be beyond the limits of motor control. then the speed of the motor will depend .upon the extent to which the cylinder is shifted away front its middle posit-ion. It is obvious that the motor will run at the highest speed or will produce the greatest torque, when the piston eccentricity is greatest. By shifting the cylinder so as to produce different degrees of eccentricity to its piston, the motor may be kept at a constant or fired speed while doing variable amounts of work, and likewise the motor may be made to operate at different set or fixed speeds regardless of the amount of work that it is doing, within the. capacity of the motor.

The means for shifting the cylinder to different ositions will now be described. The cylinder is retained at or restored to its middle position or with its bore concentric with the piston by equal opposed resilient means or resisting means, shown as comprising helical compression or thrust springs, h (11 22 f l t t Wh th e. an e or manna ac ua ion. en e valve-20 is in the position corresponding to 12 acting in a lateral direction between t cylinder 7 and its inclosing frame 1. Such mutually opposed springs are shown as eight in number, four at each side, arid as reframe.

tained in place by having their ends resting in sockets formed in the cylinder and in the The springs 12 are at all times under opposin tensions and always tend to restore the cy inder 'to its middle or concentric position and will do so whenever the cylinder is left unrestrained.

Power means are provided for .movmg' the cylinder away from its concentric position in opposition to the springs 12 and to a position of eccentricity with reference to the piston. .Such means are shown as hydraulic power means, and include liquidcarrying controlling-pipes 13 and 14: openg into the casing at each side of the slidable cylinder, through openings 15 and 16 in the frame 1. To operate the motor in one of its directions of rotation motive liquid is supplied under pressure through one of the pipes 13 or 1 1, and acts upon the cylinder as a plunger and in opposition to the springs 12 at the opposite side of the casing, and slides the cylinder over to an cecentric location, as shown in Fig. 3, wherein the cylinder has been moved to the extreme position resulting from the pressure of liquid admitted through the pipe 13. The cylinder will be forced overv to a more or less eccentric relation according to the quantity of liquid admitted. If the liquid pressure in the pipe 13 or 14, as the case may be (13 as seen in Fig. 3) be relieved, then the compressed springs will restore the cyl- .inder to its concentric relation, or will partly so restore it, according to the quantity of liquid that is permitted to escape.

Hence, to regulate the speed of the motor,

pressure-liqu d is either supplied to or allowed to escape from the casing through one of the pipes 13 or 14, the other such pipe being left freely open.

Pressure-liquid is thus supplied to the one or the other of these pipes accordin to the direction of motor rotation desire The motor receives its supply of motive liquid through a supply-pipe or supply-conduit 17 connected to the inlet 10 of the motor, and the exhaust-liquid leaves the motor through an exhaust-pipe or exhaust-conduit 18 connected to the outlet or exhausbopcnhe pressure-liquid for regulating the speed of the motor is supplied through a regilating-pipe 19 which is connected to ei er the one or the other of the controlling pipes 13 or 14 accord to the position of a four-way reversing va 've 20, the other of the controlling-pipes being concurrently connected through the same valve 20 with a relief-pipe 21 opening into the exhaust-pipe 18.

The reversing valve 20 is provided with a thehorizontal position of-the handle 22, as

was

regulating-pipe 19 will be placed in comj munication with thecontrollin -pipe 13 and the controlling-pipe 14 will e placed in communication with the relief-pipe 21. (Fig. 1) and the direction of rotation will be clockwise as viewed'from the right of Figs. 1 and 2 and as indicated by the arrow in Fig. 3. When the reversing valve is in the position indicated by the vertical posi- 111 Fig. 3. It isapparent that the actuation of the reversing valve interferes in no manner with the speed-regulation, as in one instance and for one direction of motor rotation speed regulation is effected through V the controlling-pipe 13 while the controllingpipe 14 is freely open, and in the other instance and opposite direction of motor rot-ation speed regulation is eifected through the controlling-pipe 14 while the controllingpipe 13 is freely open. A

The means for supplying and for relieving the liquid pressure in the regulatingpipe 19 to eflect the speed regulation of the motor, include a speed-controlling or speed regulating valve shown as a balanced piston-valve having a cylindrical valve-chamber 23 open to the atmosphere at both ends. I Within the valve-chamber 23 are located slidable valve-heads 24 and 25 carried by a valve-stem or actuating-rod 26 extending to the outside of the valve-chamber for actuation of the valves, and shown as supported in and slidable through a bearing formed in a spider carried by one end of the valvechamber 23. The valve-chamber 23 has three ports or openings at different longitudinal points of its circumference; a medial port 27 and ports 28 and 29 equally longitudinally spaced from and at opposite sides of such medial port. The medial port 27 communicates with the regulating pipe 19; the port 28 communicates with a pressurepipe- 30 leading from the motor supply-pipe 17; and the port 2-9 communicates with an overflow-pipe 31 opening freely into the exhaust-pipe 18 of the motor. Hence the port I 28 forms an inlet for motive liquid to the valve-chamber and the port 29 forms an outlet from the valve-chamber to the exhaust. The inlet 28 is controlled bythe valve-head 24 and the outlet 29 is controlled by thevalve-head 25, the medial opening 27 being always open into the valve-chamber 23 but sealed away from any other communication when the valve-heads occupy their middle positions. The valve-heads 24 and 25 are spaced such a distance apart on their actuating-rod 2 and are of such a lengt that in, their 111 dial or middle positions the inlet port 28 and the outlet port 29 are both covered (Fig. 1). When the valve-heads are moved to the right the medial .port 27 and the outlet port 29 are put in communication with each other through the valve-chamber, the inlet port 28 being closed (B, Fig) 4). When the valve-heads are moved to the left the inlet port 28 and the medial port 27 are put into communication with each other while the outlet port 29 is closed (C, Fig.- 4). It is evident without further explana-. tion that when the inlet ort 28 is in communication with the medial port-27, motive liquid will pass from the supply-pipe 17 by pressure-pipe 30, valve-chamber 23, regulating-pipe 19, and controlling-pipe 13' or 14, as the case may be, to the casing, and will produce or increase the eccentricity of the cylinder to its piston; .and that when the medial port 27 is in communication with the outlet port 29, the-springs 12 will reduce or eliminate such eccentricity by forcing the regulating liquid back through the controlling-pipe thatis in communication with the regulating-pipe 19 and thence through the valve-chamber and out to the exhaust-pipe 18 by way of the. overflow-pipe 31. The extent of movement of the slidable cylinder depends upon the quantity of liquid that ,is

the regulating-pipe 19. In turn the admission of regulating liquid to or the escape of such liquid from the regulating-pipe 19 depends upon the positions of the valve-heads 24 and 25, as determined by their common valve-stem 26. To give increased delicacy of regulation the lap of the valve-heads over the pcrts28 and 29 toward the middle of the valve-chamber is of small extent when the valve-heads occupy their middle positions, as may be seen in Fig. 1, so that only a slight movement of the valve-stem 26 suffices to effect regulation of the motor.

To prevent sudden, too great or oscillatory movementof the slidable cylinder in the operation of the speed-regulating means such as might cause sudden speed fluctuations in the motor, means are provided for choking or restricting the passageways through the controlling-pipes 13. and 14 so as to produce a dashpot effect upon the cylinder. The choking or restricting means are preferably adjustable, so as to give more or less dashpot effect as -desired, and are shown as ordinary globe valves 32 interposed in the controllingpipes 13 and 14. I

To secure a substantially constant motor. speed at varying loads the valve-stem' 26 is actuated by a speed-influenced governor 100 forced into or is permitted to escape' from shownas of the centrifugal ball type. The

' verhor balls 33 are carried at the ends of t e' longer arms of bell-crank levers '34 I which are pivoted to a collar or governorwhirl 35 fixed onthe motor shaft 3. The

shorter arms of such bell-crank levers, are

connected by links 36 with a second'collar or governor-head 37 rotatively seated in an annular groove in the enlarged head of the valve-stem 26 which constitutes also a governor-stem andis axially alined w1th the motor shaft 3. The centrifugal movement of the governor balls is resisted by a coiled thrust spring 38 surrounding thecombined governor stem and valve-stem 26 and interposed between the enlarged o'rtion thereof and a collar.39 throughwhic the governorstem is slidable. The collar 39 is retained in stationary position at the desired location by a governor-controllinglever 40.

Hit be assumed that the motor is receiving motive liquid at a substantially constant pressure, then so long as the load upon the motor is constant the positions of the governor and speed-controlling valve will not change and will be asshown in Fig. 1. Should the load on the-motor be diminished, the tendency of the motor to increased speed will be checked by the centrifugal movement of the governor balls, which will slidethe piston-valves 24 and 2%}. to the right, putting in communication with each other the ports 27 and 29 (B, Fig. 4)','and permitting the springs 12 to reduce the eccentricity of the motor piston, as liereinbefore explained unspring 38, which will put the ports 28 and.

27 into communication (C, 4), per mitting the pressure of the motive liquid to increase the eccentricity of the'motor piston,

"until thespeed of the motor becomes steady at the normal rate, whenthe former medial positions of equilibrium of the governor and controlling-Va ve will be restored, due-tothe restoring of such normal speed.

It is now apparent that the motor is adapted to and is automatically controlled 'so as to maintain a substantially fixed speed while operating under varying loads. It is also obvious that variations in the pressure mechanism.

of the motive liquid within certain restricted limits will not vary the speed of the motor, by reason of the operation of the governing As the speed-regulati movements of the slidable cylinder are-e ected by hydraulic power, such hydraulic power being controlled by the governor, the speedregulation of the motor is rendered much. more accurate and delicate thanj'we're the governor itself connected direct! T to theHslid'able cylinder. By reason 0 the fact thatf the regulatin movement of the slidablecylinderun or hydraulic controlling. pressure is opposed'by resilient cylinder-restormg means, such as the s rings 12,'speedregulation is much simplified, also the reversing mechanismris simplified and rversal is facilitated without interfering with' the speed-regulation. To permit of a change in the-fixed or normal speed of the motor,.means are provided for manually controlling the automatic overnor. These manual governor-control ing means are effective to cause the state ofslidable collar 39 and has its fulcrum, shown as a slotted pivotal connection, in a station: ary bracket 41. For retaining the lever at any desired position against the tension of the spring 38 a stationary rack 42 and pawl 43 with spring 44 are provided. As the spring compresslon, the teeth of the rack may slope as shown to facilitate convenient mahipula: tion of the lever. If the controlling lever be placed at the extreme right, that position will represent and will result in producing the lowest fixed motor speed for which provision is made, because then the governor spring 38 will be under the least tension,

correspondingto a decreased speed of governor and contro1ling'-valve equilibrium. Conversely. if the controlling lever be placed at the extreme left. the highest fixed motor s ed will result. Intermediate speeds of.

t e motor may be secured by intermediate positions of the lever 40. As illustrated in the drawings, the set or temporarily fixed speed of the motors would be between the lowest and medium, as indicated by the po: sition of the controllin levers.

38 only acts in one direction, under Suppl -valves 45 an 46, shown as ordil nary glo e valves, are located in the supplypipe 17, and either one or the other of these valves may be used, or both may be used in conjunction, as desired. It is to be noted that the pressure-pipe 30, leading to the speed-controlling-valve, is connected to the supply pipe 17 at a point between the valves 45 and 46. If the valve 46 alone is used, then the pressure-pipe 30 is at all times in communication with the motive liquid under pressure, and when the motor is at rest motive liquid will have access to the valve- Ill ' motive liquid is .cut

pipe 30 and the motor would probably usumemes chamber 23 of the cont-rollingevalve C, Fig.

4) and will force the slidahle motor cylinder over to an extrei'ne eCtiHIltllC position, as seen in Fig. Under some conditions of service there wouhlbe an advantage in this as 1tenables-the motor to start always under full torque. If the valve 45 be used alone then when the motor is stop )ed pressure of the al y come to rest with its cylinder in" a medial or concentric position, or possibly at an intermediate point. according to hou much liquid, if any, is left imprisoned in the pipe and its connections. This would result in a more gradual starting of the motor when the motive liquid is again admitted thereto. If, after having stopped the motor by closing the valve 45, it is desired'to start the motor under the strongest torque, first the valve 46 would beclosed and then the valve-45 opened, to slide the motor cylinder 5 to its most eccentric position, after which the valve 46 would he opened, to start the motor. immediately assumes control of the speed as The autol'natic overnor of course soon as the motor has started.

"The motor-mechanisms above described are best adapted and are intended to operate underasubstantially constant hydraulic pressure, and are especially or particularly intended andadapted to be connected in parallel relation with each other for operation in a hydraulic conduit circulatory sys item, such as illustrated in Fig. 4, the motors being independently operable and controlable without interference with each other. .Tn'snch a system' a common supply-pipe or feed-conduit.,4=7 communicates with all of thesupply-pipes 17, andall of the'exhaustpipes'18 open into a-common exhaust-pi 'ie or retm-n'conduit 48. -Any desired'meal'is may 'bewemployed for circulating a motive liquid in the-systemunder the conditions required of lnaintaining a'substantially con-J sta-nt circulatory pressure. The means shown comprise an automatically-controlled steam-operated pump for transferring the motive liquid from a receiving tank 49', into which the return-conduit. 48 discharges, to

' a1 pressure reservoir 50 from which the feed- Ill. "open to the atmosphere through its neck (31.

from the pressure certain positional relation,

' mltted" to pass through thefdev tion, poweropera-ted" means for shifting the "movable eoa.ct-ing'i parts; "to each other toffproduce" from the pressure-reservoir ;50, thc upper part of wliich contains air under the pressure present the pressure reservoir, the dotted lme nd cating the liquid level there: As shown the receiving tank ls freely Tt is obvious. that vi'irimisfiuodifiwtions may beqnade-in'thc construction shown and above particularly described-Within the principle and scope of my invention. v

I claim: 1 i

LI-n" combination in a hydraulic power device comprising 'a plurality otrelatively movable coa'cti'ngiart s Shifta ble relatively. "to each other to produce'ditferent coactivc relations ofthese-pa'rtfs thereby to vary the capacity'of the device for motive liquid permitted to pass through the 'devi'ceduring a complete series of operations, resilient means tending to maintain the coacting parts in a and"power operated' means "Eor shifti'ngthe coact ing parts relatively to each other in-opposition to the resilient means. 2%;Int'oinbinationina hydraulic power device'compr'is'ing a pluralitybf relatively rotary co'acting-parts shiftalile "relatively to each otherto produoe different coactive relations of these: partsftherbyf tof'vary the capacity of the device for motivefliquid pcrper-'rotacoac'ting parts relatively to each other, and resilient means opposed to the pfoiifer operated-@meansand tendingftoresto're the coacting parts ton certain relative position.

3. In combination in ahydraulic power device comprising a phirii tyfof relativeh fble relatively I n if'erent coactive relations of these' parts th'er y to vary the capacity of thedevice for niotivefliquid permit-ted to passfthroiigh the devi e'di1ring a complete series of operations, resilient means tending 'to niaintaini'ithe enacting; parts in a certainrelative ositioh, an

hydraulic power means for s "4-. In combination in a hydraulic power device comprising aplurality of relatively rota ry coact-ing parts shi ftable relativelyto each other to produce different coactive relations oft-hese parts therbyto vary the capacity of the device for motive liquid permitted to pass through the device per rotation, resilient means tendingto maintain the coact:

. ing parts in a certain relative position, and

hydraulic power means for shifting the coacting parts relatively to each other in opposition to the resilient means.

5. In combination in a hydraulic power device comprising a plurality of relatively movable coacting parts shiftable relatively to each other to produce different coacting ifting th'e'coacting parts relatively to each other in opposition to the "resilient means. 1

relations of these parts thereby to vary the capacity of the device for motive liquid permitted to pass through the device during a complete series of operations, reslhent means tending to maintain the coacting par-ts in a certain relative position, power operated means for shifting the coacting parts relatively to each other in opposition to the re silient means, and an automatic governor in control of the power operated means.

6. In combination in a'hydraulic power device comprising a pluralit of relatively rotary enacting parts shiftab e relatively to each other to produce difi'erent coactive relations of these parts thereby to va the capacity of the device for motive liqui permitted to pass through the device er rotation, power operated means for shi ting the coactmg parts relatively to each other, resilient means opposed tothe power operated means and tending to restore the coacting parts to a certain relative position, and an automatic governor in control of the power operated means.

.7. In combination in a hydraulic power device comprising a plurality of relatively movable coacting parts shif table relatively to each other to produce difl'erent coactive relations of these parts thereby to vary the capacity of the device for motive liquid permitted to pass through the device during a complete series of operations, resilient means tending to maintain the coacting arts in a certain relative position, hydrau ic power means for shifting the coacting parts relatively to each other in opposition to the resilient means, and an automatic governor in control of the hydraulic power means.

8. In combination in a hydraulic power device comprising a plurality of relatively rotary coacting parts shiftable relatively to each other to produce difierent coactive relations of these parts thereby to vary the capacity of the device for motive liquid permitted to pass through the device. per rotation, resilient means tending to maintain the coactin parts in a certain relative position, hydrau ic power means for shifting the coacting parts relatively to each other in opposition to the resilient means, and an automatic governor in control of the hydraulic power means.

9. In combination in a hydraulic power device comprising a plurality of relatively movable coacting parts shiftable relatively to each other to produce diiferent coact-ive relations of these parts thereby to varv the capacity of the device for motive li uid permitted to pass through the device uring a complete series of operations, resilient means tending to maintain the coacting parts in a certain relative position, power operated means for shifting the coacting parts relatively to each other in opposition to the resilient/means, and a manually-controllable variable-speed automatic governor in control of the power operated means.

10. In combination in a hydraulic power device comprising a pluralit of relatively rotary coacting parts shiftab e relatively to each other to produce difierent coacting relations of these parts thereby to var the capacity of the device for motive ,liqui permitted to pass through the device per rotation, power operated means for shifting the coacting parts relatively to each other, resilient means opposed to the power operated means and tending to restore the coacting parts to a certain relative osition, and a manually-controllable varia le-speed automatic governor in control of the power operated means.

11. In combination in a hydraulic power device comprising a plurality of relatively movable coacting parts shiftable relatively to each other to produce dilferent coacting relations of these parts thereby to var the capacity of the device for motive li ui permitted to pass through the device uring a complete series of operations, resilient means tending to maintain the coacting parts in a certain relative position, hydraulic power means for shifting the coacting parts relatively to each other in opposition to the resilient means, an automatic governor in control of the hydraulic power means, and a manual device for controlling the governor so as to compel'it to become operative at different selected speeds.

12. In combination in a hydraulic power device comprising a plurality of relatively, rotary enacting parts shiftable relatively to each other to produce different coactive re laticns of these parts thereby'to var the capacity of the device for motive liqui permitted to pass through the device per rotation, resilient means tending to maintain the coactin parts in a certain relative position, hydrau ic power means for shifting the co actin parts relatively to each other in opposition to the resilient means, an automatic governor in control of the hydraulic power means, and a manual device for controlling the governor so as to compel it to become operative at different selected speeds.

'13. Incombination in a hydraulic power device comprising a rotary piston and a cylinder for the piston, the piston and cylinder being relatively shiftable toward and away from concentric relation regardless of the rotation of the piston, thereby to vary the rotative coactive relation of the piston and cylinder, resilient means tending to maintain a concentric relation of the cylinder and piston, power means opposed to the resilient means to produce an eccentric relation between the piston and cylinder, and a manually-controllable variable-speed governor in control of the power means.

14. In combination in a hydraulic power device comprising a rotary piston and a cylinder for the iston, the iston and cylinder being relatively shifts, le toward and away from concentric relation regardless of the rotation of the piston, thereby to vary the rotative coactive relation of the piston and cylinder, resilient means tendlng to maintain a concentric relation of the cylinder and piston, power means opposed to the resilient means to produce an eccentric relation between the piston and cylinder in any one of a plurality of directions, manually-controllable reversing means in control of the power means to determine the direction of piston eccentricity and -a manually-- controllable variable-speed governor in control of the power means to vary t-he'degree of such eccentricity.

15. In combination in a hydraulic power device comprising a rotary piston and a cylinder for the piston, the p ston and cylinder being relatlvely shifta le toward and away from concentric relation regardless of the rotation of the piston, thereby to vary the rotative coactive relation of the piston and cylinder, resilient means I tending to maintain a concentric relation of the cylinder and piston, hydraulic power means opposed to the resilient means to produce an eccentric relation between the piston and cylinder in either of two,opposite directions, and manually-controllable reversing means in control of the hydraulic ower means to determine the direction 0 piston eccentricity.

16. In combination in a hydraulic power device comprising a rotary piston and a cylinder for the piston, the piston and cylinder being relatively shiftable toward and away from concentric relation regardless of the rotation of the piston, thereby to vary the rotative coactive relation of the piston and cylinder, resilient means tending to maintain a concentric relation of the cylin-. der and piston, hydraulic power means opposed to the resilient means to produce an eccentric relation between the piston and cyl-' inder in either of two opposite directions, manuallyecontrollable reversing means in control of the hydraulic power means to determine the direction of piston eccentricity. and a manually-controllable variable-speed governor in control of the hydraulicpower means for moving the cylinder in the easing toward the sition of concentric relation of the cylin er and piston.

18. In combination in a hydraulic power device comprising a rotary piston, a casing within which the piston has its bearings, and a cylinder for the piston slidable within the casing transve'rselyto the axis of the piston to produce different amounts of piston 'eccentricity in either of opposite directions re gardless of the rotation of the piston, therey to'vary the rotative coactive relation of the piston and cylinder; resilient means tending to maintain a 'concentric relation of the cylinder and isior, and means for subjecting the cylinder to hydraulic pressureto produce eccentrical relations bet-ween the cylinder and its piston.

19. In combination in a hydraulic power device comprising a, rotary piston, a icasin within which the piston has its bearings, an a cylinder for the piston slidable within the casing transversely to the axis of the piston to produce difi'erent amounts of piston eccentricity in either of opposite directions;

resilient means tending to maintain a conpassages openin into the casing at each side of the cylinder aterally, means for supplying liquid under hydraulic pressure through such passages to one side or the other of the cylinder to slide the cylinder to an eccentric relation in one direction or the other, and means for adjustably restricting the bores of the passages to produce a damping efl'ect upon the sliding movements of thecylinder.

20. In combination in a hydraulic power device comprising a rotary piston, a casing within which the piston has its bearings, and

a cylinder for the piston slidable within the casing transversely to theaxis of the piston to produce different amounts of piston ec centricity in either of opposite directions; resilient means tending to maintain a con centric relation of the cylinder and piston, controlling-passages opening into the casing. at each side of the cylinder, a regulatingconduit, and a manually-controllable fourway valve for opening communication between the regulating conduit and either one or the other of the controlling-passages and for concurrently providing a free outlet for the other controlling-passage, whereby the hydraulic pressure will be opposed to the resilient means and will slide the cylinder to one position or the other of eccentricity to centric relation of the cylinder and piston,

its piston according to the position of the other of "the controllings ent means" tending 'to. maintain a centric relation oithe cylinder-311dp g controllin -passa opening into'thec'asing at each side of t ej-cylinder, a" r'egu'lating-- conduit, -a manuallycontrollable. fourway .valve for openingwommunication between the regulatingconduit andeither one or the A ssages and for concurrently providing a ree outlet for the other controlhng passage, a source of liquidunder pressure, and :a; controlling-valve adapted when in its middle. position to seal the regulating-conduit and when moved in one "direction to admit pressure-liquid from such source to the regulating-conduit and when moved in the, other direction to open a" .free outlet from the regulatin -conduit,'

whereby movement of the contro ling-valve regulatesthe amount of eccentricity between the cylinder audits piston.- I

22. In combination in' a hydraulic power device comprising a rotarypiston, a casing within which the piston hasiits bearings. and a cylinder for'the pistonislidable in t'ne casingtransversely to the axisof the piston to produce diflerent. amounts of piston eccentrieity'; a controlling-passage opening into the casing laterally of the cylin, er, a source ofliquid under pressure, a controlling-valve adapted according to its position to seal the controllingpassage or to admit pressureliquid from such source to the controllingpassage or to open a free outlet from the'coin. trollingpassage, and resilient means tending to preserve c'oncentricity of thecylindei and piston in opposition tothe hydraulic pressure from the above-named source, M

23. In combination in a hydraulic power device comprising a rotary p1ston, a casmg within which the piston has its bearm s, and

a cylinderforthe piston slidable-in t ecascontrolling-passage, resilient means tending topreserve concentricity of the cylinder and Z piston in o position to the hydraulic pres- .matie governor responsive to speed sure from t e above-named source, an autovariations in the motor and for actuating the controlling-valve,.and a manual device for controlling the governor so as to render 1t actuative at any selected "motor speed.

[24. In combination in a hydraulic power device comprising a rotary piston, a casing within which the piston has its bearings,

and acylinder for the piston slidable within the casing transversely to'the axis of the piston to produce different amounts of piston.

controlling-pass: into the casing a eccentricity in either of opposite directions;

resilient means tending to'mai'ntain a cones opening respectively each sideof the cylinder laterally, a regulating 'conduit, a manuallycontrollable fourway valve for opening comcentric relation og/thecylinder and piston,

munication between the regulating conduit and either .one or the. other. of the controlling-passages and for. concurrently I prov ding a freeoutlet tor the 'other controlling passage, a source of liquid under pressure, acontrolling-va-lve' adapted whenin its middle position to seal the regulating-conduit andpwhen moved in one direction to admit pressure-liquid from such source to the reg ulatirig-conduit and when moved in. the 1 otherdirection to open a free outlet from the motor speed.

' 25. In combination in-a hydraulicpower device comprising a rotary piston, a casing ands cylinder for the iston slidablejin-the casing transversely tow-t c axis of theEpiston'.

regulating-conduit, an automatic overnor responsive to speed variations-in t e motor, for actuating the controlling-'valve,-and a manual device for controlling the governor so as torender it actuative at any. selected.

so as to change the eccentricity" of the piston relatively to the cylinder; resilientmeans,

tending to maintain a concentric relation of the cylinder andpiston, a "controlling-passage opening into'the casing laterally of the ;cylinder, means for supplying liquid under pressure to such passage, and adjustable means for reducing the bore of the controlling-passage so as to clamp sudden sliding of i the cylinder. v

26. In comblnation in a hydraulicipower device comprising a rotary piston, a casing, and a cylinder for. thepiston slidable in the casing transversely to the axis of the piston. so as to change the eccentrlcity of the piston,

relatively to the cylinder; resilient means tendingto maintain a concentric relation of the cylinder and piston, a controlling-passage opening into the casing laterally ot the cylinder, and means for supplying liquid under pressure to such passage, such passage;

having a restricted portion for checking sudden movements of the cylinder.

27. In combination in a hydraulic power device comprising a rotarypiston, a casing, and a cylinder-for the piston slidable within the casing transversely to the axis of the piston to produce different amounts of piston eccentricityin either of opposite directions; resilient means tendin to maintain a concentric relation of the cy indei' and piston, passages openin into the casing at each. side of the cyhnder, and means for supplying liquid under hydraulic pressure through such passages toone side. or the other of the cylinder to slide the cylinder toan eccentrlc relation in one direction or the other, such passages having restricted portions for preventlng sudden sliding of the device comprising a rotary piston, a casing,

and a cylinder for the piston slidable in the casing transversely to the axis of the piston to produce 'difi'erent amounts of piston eccentricity; a controlling-passage opening into the casing laterally of the cylinder, 21. supply-conduit for the motor, a pressurepipe communicating with the su ply-conduit, a controlling-valve in control of communication between the pressure-pipe and the controlling-passage, resilient means tending to preserve concentricity of the cylinder and piston in opposition to the h draulic pressure from the supply-conduit, and a pluralityof supply-valves including one in the supply at each side of the point of communication therewith of the abovenamed pressure pipe.

29. In combination in a hydraulic power device comprising a rotary piston, a casing, and a cylinder for the casing slidable in the casing transverselyto the axis of the piston to produce difi'erent amounts of piston eccentricity in either of opposite directions;

resilient means tending to maintain a concentric relation of the cylinder and piston, controlling-passages opening respectively into the casing at each side of the-cylinder laterally, a regulating-conduit, a manuallycontrollable fourway reversing valve adapted when in one position to open communication between the regulating-conduit' and one of, the controlling-passages while concurrently providing a free outlet for the other controlling-passage and adapted when in its other position to open a free outlet for the last-named controlling passage, a supply-conduit for the motor, a pressure-pipe leading from the supply conduit, a controlling-valveadapted when in its middle position .to seal the regulating-conduit and when moved in one direction to open communication between the pressure-pipe and the regulating-conduit and when moved in the other direction to open a free outlet from the regulating-conduit, an automatic 60 governor responsive to speed variations in the motor for actuating the controllingvalve, a manual device for controllin governor to render it actuative at di erent selected motor speeds, and a supply-valve in the supply-conduit at each side of the oint of communication therewith of the a ovena-med pressure-pipe.

In testimony whereof I have aflixed mysignature in presence of two witnesses. V ALBERT V. T. DAY.

Witnesses:

' WM. ASHLEY KELLY,

BERNARD COWEN.

the y

Images