US735684A - Fluid-motor. - Google Patents

Description

No. 735,684. PATENTED AUG. 4-, 190a.

. e. WHITE.

FLUID MOTOR.

APPLICATION II LED NOV. 29, 1901.

15m- MODEL. 50 a SHEETS-SHEET 4.

WITNESSES:

IN VENT OR 'ATTORNEY.

PATENTED' AUG. 4, 1903.

G. WHITE. FLUID MOTOR. APPLIOATION FILED NOV. 29, 1901.

6 SHEETS-SHEET 5.

no MODEL.-

IN VEN T OR %TORNE Y WITNESSES:

UNITED STATES v i'atented August 4, 1903:.

PATENT OFFIC GEORGE WHITE, OF JERSEY CITY, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO MANLY M. GILLAM, TRUSTEE, OF NEW YORK, N.Y;

FLUID-MOTOR.

SPECIFIUATION forming part Of Letters Patent NO. 735,684, dated August 4, 190%.

Application filed November 29, 1901. Serial No. 84,001. (No model.)

To all whom, it may concern.-

Be it known that I, GEORGE WHITE, of Jersey City, in the county of Hudson,in the State of New Jersey, have invented new and useful Improvements in Fluid-Motors, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to an engine operated by any suitable elastic fluid, such as steam, compressed air, or carbon dioxid; and it consists of a drum carrying in its interior a series of cylinders arranged radially with reference to a fixed axis, a shaft about which the drum and cylinders are revolved, and of pistons connected witha fixed crank eccen trically arranged with relation to the shaft, so that by the ad mission of the motive fluid a change in position of the cylinders with relation to the piston is produced, whereby the parts are rotatedthat is, by the admission of the motive fluid to the cylinders on each side of the piston in alternation their relative position is changed as they rotate together.

The essential parts of my engine are the fixed shaft of two sections, on which the drum is jonrnaled, and the crank and crank-pin on one section eccentrically arranged in reference to the shaft and forming a second center,-to which are connected a plurality of piston-rods on the pistons fitting a corresponding number of cylinders arranged in the drum revolving on thetwo-part fixed shaft as a center, but eccentrically with relation to the crank-pin. This fixed shaft is the drumbearing, and to its respective sections are fitted the tubular main shafts of the drum, carrying one or more power-pulleys. One section of the fixed shaft may be made hollow or tubular for the exhaust and the other section tubular for the admission of the motive fluid, which passes through suitable channels, inlets, and ports formed in one head of the drum to the steam-chamber and thence to the cylinder. These parts are formed in shells jonrnaled on trunnions between the drum-heads, so as to swing and adapt themselves to the changed position of the pistons. chamber is fitted a main valve operated by To each steam-chest or valve cams to admit and cut off the steam from the cylinder, and within the hollow interior of each main valve is arranged an adjustable valve operated by valve-rods fitted to and rotating on an eccentric-pin secured eccentrically to the inner end of one section of the fixed shaft, whereby the motive fluid is cut 06 sooner or later in the stroke. This section of the fixed shaft carrying the eccentricpin is adjustable by an exterior arm to effect such change in the cut-off. For the sake of convenience in explanationI here call the head of the drum, adjacent to which the cyl inders and pistons are arranged, the front head and the front of my engine, and the opposite head, adjacent to which the valvechambers are arranged, and adjacent parts the rear of my engine.

My invention is explained with reference to the drawings herewith, in which the same reference-numerals used in the specification indicate the same parts in all of the figures.

Figure I is a longitudinal section of myinvention. Figs. II, III, and IV are cross-sections thereof, taken, respectively, onsectionlines II, III, and IV of Fig. I. Fig. V is an elevation of the rear face of the drum, showing the inlet-passages dotted. Fig. VI is a cross-section of Fig. V. Fig( VII is a top plan view of the cylinder-valve-chamber shell. Fig. VIII is a longitudinal section of Fig. VII. Fig. IX is an elevation of the main valve. Fig. X is a longitudinal section of Fig. IX. Fig. XI is a longitudinal section of the cutoff valve. Figs. XII and XIII are respectively front and side elevations of the piston-rod. Figs. XIV and XV are respectively front and side elevations of the eccentric-rod or valve-rod. Fig. XVI is a plan of the mainvalve cam-groove block. Fig. XVII is a cross-section on line XVII of Fig. VII,

showing inlet-passages through the trunnion carrying suitable standards 2 2, in whichis journaled the drum 3 on front andrearbearings or tubular main shafts at 16, integral with the drum and carrying one or more powerpulleys 5. In front standard is fixed the front section 6 of fixed shaft, which may be called the crank-shaft or exhaust-shaft, made tubular for the exhaust and carrying the integral crank 8 and crank-pin 9.

The drum is a cylindrical shell for carrying the operative parts and might be merely a framework, except that it receives the exhaust passing through outlet 7 in the crankshaft 6. It is composed of two heads of disk shape, 13 and 14, called, respectively, the front and rear heads, between which is bolted the cylindrical shell 15 to complete the drum. The front main shaft 4 is intogral with the front head, and the rear main shaft 16 is integral with the rear head and is fitted as a journal-bearing on the rear section of the fixed shaft,called the inlet-shaft 17, because it is formed with the channel 18 for the admission of the motive fluid. The inlet-shaft 17'is secured adjustably in position by means of mechanism hereinafter described.

Around the inner periphery of the drum between the heads are journaled a plurality of cylinder-valve-chamber shells 24, journaled on trunnions between the heads of the drum, so that they may swing during rotation and adapt themselves tothe changed position of the pistons. 25 is the solid front trunnion fitting the front drum- head 13, and 26 the hollow rear trunnion fitting the rear head 14 and formed with inlet-channel 27 and ports 28 for the admission of the motive fluid. 29 are bushings, and 32 lock-nuts fitted to both trunnions. By means of outer and inner plates 30 31 on these cylinder-shells are formed and completed in each shell a cylinder 35 and avalve-chamber 36, with suitable passages for the inlet and exhaust of the steam, to lie hereinafter described. There may be one or more of these shells with cylinder-valve chambers and corresponding pistons; but four, as here shown and described, is a desirable number to avoid the dead-center and effect a good balance of the parts.

To each cylinder 35 is fitted a piston 40, connected by jointless solid rod 41, having its opposite end formed with a head or tongue 42, curved to fit the bushing and groove 43 and secured by screw-threaded collars 44 44 on the crank-pin bushing 45, turning on the crank-pin 9 and held in position by the screw 46. These jointless solid piston-rods are simple and economical to construct and as formed and connected to the crank-pin are free to swing or shift on the bushing as it rotates and to adapt themselves to the changed position of the cylinders. Toeach valve-chamber 36 is fitted the main valve 50, formed with valve-ports 51 51, through which the motive fluid passes to the steam-ports 52 52 at each end of the cylinder when these valve-ports register therewith alternately, and through said ports 52 the cylinders alternately exhaust from each end into the exhaust-space 53 and thence through opening 54 into the interior of the drum, whence the exhaust is carried out through channel 7 in the fixed shaft or in any other convenient way.

48 represents channels in the rear heads of each cylinder-shell, and 49 ports from each end of said channels to the valve-chamber.

The main valves are operated by means of blocks 55, fitting slots in the exterior of the valves, and connected by bolts 57 to crosshead 58, carrying cam-pin 59, engaging with cam-groove 60 in the cam-block 61, secured within the reinforcing-ribs 62 on disk 63, bolted to inner face of rear drum-head 14. As the cylinder-shell swings the main valve necessarily swings with it, changing the position of the cam-pin with relation to the camgroove in which it slides, thereby operating the valve at proper times to admit and cut off the steam.

Within the central bore or opening 69 of the main valve is fitted the cut-off valve 70, whose operation may be regulated or adjusted to cut off the motive fluid sooner or later, permitting more or less expansion. This valve is operated by block 72, engaging in slot 73 in the cut-0E valve and moving in elongated slot 74 in main valve made to receive it and connected by bolts 75 to crosshead 76, formed with a curved groove 77, in which engages pin 78 on pin-block 79 on end of valve-rod 80, having head or tongue 82, by which by washers 83 it is secured to fit bushing 84 on the eccentric-pin 85, arranged eccentrically on the inner end of inlet-shaft 17, whereby the valve-rods are secured to said inlet-pin and are free to shift thereon as the position of the cylinder and valve-chamber shell changes in reference thereto. 86 is screw for securing theparts in position. The pin-block 79 is secured to the guide-rod 87, pivotally bolted at 88 to the inner face of the rear drum-head, so that the pin-block swings on 88 as a center and is held in proper position relative to the cut-off valve to control said cut-off valve.

All the pistons and valves may be provided with suitable steam-tight packing.

'Ihe cut-0E valves are adjusted to operate and cut ofi sooner or later by means of the following mechanism,by which the inlet-shaft may be adjusted and held in its fixed position after such adjustment: On the outer end of this inlet-shaft 17 is keyed the arm 92, having pin 93, provided with set-screw 94, fitting the segmental groove 95, so that the arm may be swung to one side or the other and secured in desired position, thereby adjusting the position of the inlet-shaft and the eccentric-pin thereon and the operation of the cut-off valves. One end of the groove corresponds to the greatest amount of expansion and the other to the least.

From this description the operation of my engine will be clear. The steam or other motive fluid is delivered through inlet 18 to channel 96, formed in rib 97 on inner face of rear drumhead, port 28, trunnion-channel 27,

cylinder-shell channel 48, and port 49 to steam-ch est or valve-chamber, whence its admission to the cylinder is controlled by the two valves, as hereinbefore described.

I have here described the essential features and a convenient and useful arrangement of parts for producing an engine of this general character well adapted for the use of carbon dioxid, compressed air, or any other elastic fluid under a higher pressure than common in the use of steam. The point of admission of the fluid is controlled by my arrangement of valves and may be cut off very early in the stroke, as often desirable in case of high pressure. For instance, the range-of cut off may be from one-sixteenth to seven-eighths of the entire stroke. I do not limit myself to particular details of construction, for they may be much varied.

In Fig.VII, 98 98 are bolt-holes for bolts to secure outer plate 30 (and inner plate 31) on the shell, 99 99 holes for bolts 57 57 of the main valve, and 100 100 holes for bolts '75 of the cut-off valve.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a motor, the combination of a fixed shaft composed of two separate sections, suitable supports for said sections, a drum journaled between said sections, an arm or crank arranged within the drum on one of said sec,- tions, a series of shells arranged within the drum around the fixed shaft each shell having a cylinder and a valve-chamber, pistons fitted to the cylinders and connected to the crank, valves arranged in the valve-chambers to cut off the motive fluid, means to operate the valves, and means to admit the motive fluid to the valve-chambers and to the cylinders.

2. In a motor, the combination of a fixed shaft composed of two separated sections having a common axis, suitable supports for said sections, a drum journaled between said sections, an eccentric crankarranged within the drum on one of saidsections, a crank-pin on the crank arranged eccentrically with reference to said axis, a series of shells arranged within the drum around the fixed shaft, each shell having a cylinder and a valve-chamber, pistons fitted to the cylinder and connected to the crank-pin'by a rigid' piston rotatably fitted to the pin, valves arranged in the valve-chambers to cut off the motive fluid, means to operate the valves, means to admit the motive fluid to the valvechambers and from the valve-chambers to the cylinders, and means to permit the exhaust of the motive fluid from the cylinders.

23. In a motor, the combination with a suitable support, of a shaft fixed thereon in two sections, of a crank within the drum on one section eccentrically arranged with reference thereto, a drum having integral, hollow shafts fitted to said fixed sections and journaled thereon, shells radially arranged and journaled around the periphery of the drum in its interior, each shell-having a cylinder and a valve-chamber, the cylinders and chambers being arranged at right angles to the fixed shaft, a piston fitted to each cylinder and connected by a rigid piston-rod tothe crank, the piston-rods being journaled on the crank, main valves and cut-off valves fitted to the valve-chambers to control the motive fluid, means to operate the main valves to admit the motive fluid and means to operate the cut-off valve to regulate the cut-off, said drum being formed with suitable channels and ports to admit the motive fluid to the valvechambers and cylinders.

4. In a motor, the combination with suitable supports,ofafixed shaftarraugedthereon in two sections, a supporting-drum journaled between said sections, an eccentric crank and crank-pin on one of said fixed sections arranged within the drum, a series of shells journalecl between the drum-heads around the fixed shaft and formed each with a cylinder and a valve-chamber, pistons fitted to the cylinders, rigid piston-rods pivotally connected to the pistons and rotatably connected to the crank-pin, main valves fitted to the respective valve-chambers, means to operate the main valves to admit and cut off the n10- tive fluid, cut-01f valves fitted within the main valves, and means to operate the cut-off Valves to out off the motive fluid sooner or later in the stroke, said drum and shells being formed with channels and ports to admit the motive fluid to the valve-chambers and from the val ve-chambers to the cylinders.

5. In a motor, the combination with suitable supports, of a fixed shaftsupported' thereon, said shaft being divided into front and rear sections, a drum journaled between said sections, an eccentric crank and crankpin arranged within the drum on the front section, a series of shells journaled between the drum-heads around the fixed shaft each having a cylinder and a valve-chamber, pistons fitted to the cylinders, piston-rods connected to the pistons and rotatably secured on the crank-pin, a hollow main valve fitted to each valve-chamber, means to operate the main valves to admit and cut off the motive fluid, a cut-off valve fitted within each hollow main valve, means to operate the cut-off valve to cut oif the motive fluid, and means to adjust the operative mechanism of the cut-01f valve so that the cut-0E of the motive fluid may be effected sooner or later in the stroke, said shell and drum being formed with ports and channels to admit the motive fluid to the cylinders.

6. In a motor, the combination with suitable supports, of a fixed shaft supported thereon in two sections, a drum journaled between the sections, an eccentric crank and crank-pin arranged within the drum on the front section; a series of shells journaled between the drum-heads around the fixed shaft having each a cylinder and a valve-chamber,

pistons fitted to the cylinders, a bushing fitted to turn on the crank-pin, solid piston-rods connected to the respective pistons at one end andhaving their opposite ends fitted to the 5 bushing, means to clamp said opposite ends on the bushings so that the piston-rods can swing thereon as the drum rotates; hollow main valves fitted to the valve-chambers, means to operate the main valves to admit l and cut off the motive fluid; cut-off valves fitted within the main valves, means to operate the cut-off valves to cut off the motive fluid, and means to adjust the operative mechanism of the cut-off valves so that the cut-olf I of the motive fluid may be effected sooner or later in the stroke; said shell and drum being formed with ports and channels to admit the motive fluid to the valve-chambers and from the respective valve-chambers to the cylinders.

7. In a motor, the combination with suitable supports, of a fixed shaft supported thereon in two sections, a drum journaled between the sections, an eccentric crank and crank-pin arranged within the drum on the front section; a series of shells journaled between the drum-heads around the fixed shaft having each a cylinder and a valve-chamber; pistons fitted to the cylinders, a threaded o bushing fitted to turn on the crank-pin, solid piston-rods rigidly connected to the pistons at one end and formed at the opposite end with grooved slots and a grooved head fitting the bushing, collars screw-threaded to engage 5 with the bushing and formed to engage with the slots to secure the various pistons on the byshing so that they can swing in relation ,1" thereto as thedrum rotates; a main valve fitted to each valve-chamber and having a cen- 0 tral bore, means to operate the main valves to admit and cut 0E the motive fluid; cut-off valves fitted to the bores of the main valves, means to operate the cut-off valves to cut off the motive fluid, and means to adjust the op- 5 erative mechanism of the cut-off valves so that the cut-off of the motive fluid may be offected sooner or later in the stroke; said shell and drum being formed with ports and channels to admit the motive fluid to the valvechambers and from the respective valvechambers to the cylinders.

S. In a motor, the combination with a suitable supporting-base, of a shaft in two sections fixed on the base, an integral crank and crank-pin on the front section, a bushing rotatably fitted to the crank-pin; a drum having front and rear heads and integral hollow shafts fitted to the respective sections of the fixed shaft, the drum being formed to rotate between the sections; a series of shells journaled between the drum-heads so as to swing as the drum rotates, the shells being formed in front with cylinders and in the rear with valve-chambers; pistons fitted to the cylinders, piston-rods rigidly secured to the pistons and secured to the crank-pin bushingso as to swing thereon as the drum rotates; hollow main valves fitted to the respective valvechambers, blocks formed with cam-grooves arranged on the rear head of the drum, 0perative means connected to the main valves and engaging in the cam-grooves; cut-off valves fitted within the hollow main valves; a pin arranged eccentrically in the rear section of the fixed shaft, a bushing rotatably fitted to said pin, connections between the cut-0E valves and said eccentric-pin bushing, and means to limit the movement of said cut-ofl": valve connections; the various parts being formed with ports and channels for the admission of the motive fluid to the valvechambers and thence to the cylinders.

9. In a motor, in combination with a suitable base and suitable standards on the base, of a fixed shaft divided into front and rear sections and adapted to be secured in a fixed position on the standards, said sections being formed respectively with outlet and inlet for the exhaust and for the admission of the motive fluid; an integral fixed crank and crank-pin on the front section, an externallythreaded bushing rotatablyfitted to the crankpin; a drum having front and rear heads and integral hollow shafts fitted to the respective sections of the fixed shaft, said drum being arranged to rotate between the sections; a series of shells journaled around the fixed shaft between the drum-heads on integral trunnions so as to swing on said trunnions as the drum and parts carried thereby rotate, said shells having cylinders in front and valvechambers in the rear; pistons fitted to the respective cylinders, solid piston-rods rigidly secured to said pistons and having at their opposite ends curved slots and curved heads to fit the crank-pin bushing, threaded collars and a screw to connect the piston ends to the bushing so as to swing thereon as the drum rotates; main valves having central bores fitted to the respective val ve-chambers,blocks formed with cam-grooves arranged on the rear head of the drum, rods connected to the main valves, cross-heads on said rods and pins on said cross-heads fitting the camgrooves, whereby the main valves are operated; cut-off valves fitted respectively to the bores of the main valves; an eccentric-pin arranged eccentrically in the rear section of the fixed shaft, a threaded bushing rotatably fitted to said eccentric-pin; blocks engaging with the cut-off valves, rods securing said cut-off-valve blocks to a cut-off cross-head formed with a curved groove, the cut-off cross-head; valve-rods having pin-blocks on their outer ends engaging said curved grooves and formed on their inner ends with curved tongues fitting the eccentric-pin bushing; threaded washers to connect the valve-rod to the eccentric-pin bushing so as to swing thereon, guide-rods pivotally connected to the rear drum-head and to the respective pin-blocks; an exterior arm keyed to the rear section of the fixed shaft, a segment formed with a segmental groove adjacent to said arm, a pin on said arm fitting said segmental groove, and a lock-nut for locking-said pin in said groove; the rear drum-head, rear trunnious and the shells being formed with channels and ports to admit the motive fluid from the rear section of the fixed shaft to the valve-chamber, and thence through ports in the main valve alternately to the ends of the cylinder and for the exhaust of the motive fluid through the hollow front section of the main valve.

10. In a motor, the combination with a suitable base, front and rear standards and jour nal-bearings thereon, a hollow crank-shaft fixed in the front bearing, a hollow rear inletshaft correspondingly fixed in the rear hearing, said shafts acting as fixed bearings for the rotating portions of the motor, a crank and crank-pin on the crank-shaft eccentricfitted respectively to the crank-shaft and inlet-shaft; a power-pulley on one of said main shafts; a plurality of shells radially arranged around the edge of the drum in its interior, each shell being journaled on trunnionsin the drum-heads, the front trunnions being solid and the rear hollow to communicate with the steam-channels in the rear drum-head, each shell being formed with a cylinder in front and a valve-chamber in the rear, with motivefluid channels from the va1ve-chamber to each end of the cylinder and with channels from the hollow trunnions to each end of the valve-chamber; pistons fitted to the cylinders, solid jointless rods connected rigidly to the pistons, said piston-rods being provided on the opposite ends with tongues fitting the bushing and with grooves, collars and screws connecting said piston-rods to the bushing so as to swing thereon and to rotate on the crankpin; hollow main valves fitted to the valvechambers formed with external grooves, blocks fitted to said grooves, main -valve cross-heads, a cam-piece formed with a camgroove bolted to the rear disk, pins on the cross-heads engaging in said grooves; cut-off valves fitting within the main valves and formed with exterior grooves, blocks-fitted to said cut off-valve grooves, out-ofi-valve crossheads having curved grooves, connectingbolts between the cut-off-valve blocks and cut-off-Valve cross-heads; an eccentric-pin eccentrically, arranged on the inner end of the valve-shaft within the drum, an eccentricbushing fitted to rotate on said eccentric-pin, valve-rods having pin-blocks engaging in the cut-off-valve cross-head grooves, and having heads at their opposite, ends, collars securing said valve-rod to the eccentric-bushing so as to turn thereon, guide-rods pivotally connected to the pin-blocks and to the drum-head; an

external segment on the rear of the frame formed with a segmental groove, an arm keyed to the outer end of the inlet-shaft to turn said shaft and the eccentric-pin thereon, and a pin and lock-nut on the end of said arm engaging with the segmental groove to lock it in the positions in which it may be adjusted.

11. In a rotary engine,the combination with a fixed shaft composed of two separate sections, of a drum journaled between said sections, a crank fixed on one section within the drum, a series of shells mounted pivotally within the drum and each shell having formed Within it a cylinder and a valve-chamber, pistons in the cylinders, a straight solid rod extending from each piston to the fixed crank, valves in the valve-chambers for controlling the supply and exhaust of motive fluid and means for operating the valves, substantially as herein shown and described.

12. In a motor, the'combination with a fixed shaft composed of two separate sections, a drum journaled between said sections, a fixed crank on one section within the drum, a series of shells pivotally mounted within the drum, each shell containing a cylinder and a valve-chamber, a piston in each cylinder, a rigid piston-rod extending from each piston to the fixed crank, avalve in each valve-chamber, means for reciprocating the valves substantially as herein shown and described.

13. In a motor, the'combination with a fixed shaft composed of two separate sections, a drum journaled between said sections, a fixed crank on one section within the drum, a series of shells pivotally mounted within the drum, each shell containing a cylinder and a valve-chamber, a piston in each cylinder, a rigid piston-rod extending from each piston to the fixed crank, a valve in each valve-chamber, a disk attached to the drum, which disk has segmental slots at angles to the radii of said disk, pins in said slots, cross-pieces car rying said pins, and means for connecting these pieces with the valves, substantially as herein shown and described.

14. In a motor, the combinationwith a fixed shaft, composed of two separate sections, a

drum journaled between said sections, a fixed crank on one section, a series of shells pivotally mounted within the drum, each shell containing a cylinder and a valve-chamber, a piston in each cylinder, a rigid piston-rod extending from each piston to the fixed crank, a

tending from each piston to the fixed crank, valves in said chambers for controlling the admission and exit of motive fluid to the cylinder, cut-01f valves within the above-mew tioned valves for cutting off the supply of motive fluid and means for operating said supply-valves, and cut-oh" valves, substantially as herein shown and described.

16. In a motor, the combination with a fixed shaft composed of two separate sections, a drum jonrnaled between said sections, a fixed crank on one section, a series of shells pivotally mounted within the drum, each shell containing a cylinder and a valve-chamber, a piston in each cylinder, a rigid piston-rod extending from each piston to the fixed crank, a valve in each valve-chamber for controlling the admission and exit of motive fluid to the cylinders, cut-olf valves in said supply-valves, an additional eccentric on the other shaft-section, and means for operating said cut-0K valves from said eccentric, substantially as herein shown and described.

17. In a motor, the combination with a fixed shaft composed of two separate sections, a drum journaled between said sections, a fixed crank on one section,a series of shells pivotally mounted within the drum, each shell containing a cylinder and a valve-chamber, a piston in each cylinder, a piston-rod extending from each piston, the fixed crank, a valve in each valve-chamber for controlling the admission and exit of motive fluid to the cylinders, cut-0E valves in said supply-valves, an additional eccentric on the other shaft-section, and means for operating said cut-off valves from said eccentric and means for adjusting the position of said eccentric, substantially as herein shown and described.

18. In a motor, the combination with a fixed shaft, composed of two separate sections, a permanent eccentric on one section and an adjustable eccentric on the other section, a drum journaled between said sections, a series of shells pivot-ally mounted within the drum, each shell containing a cylinderand a valve-chamber, pistons in the cylinders, piston-rods extending from the pistons to one eccentric, valves in valvechamber, means for operating said valves, cut-0E devices in the valves and means for operating said outon? devices from the adjustable eccentric, substantially as herein shown and described.

19. In a motor, the combination with a fixed shaft, composed of two separate sections, a permanent eccentric on one section and an adjustable eccentric on the other section, and a drum journaled between said sections, a series of shells pivotally mounted within the drum, each shellcontaining a cylinder and a valve-chamber, pistons in the cylinders, piston-rods extending from the pistons to the permanent eccentric, valves in the valvechamber, a disk attached to the drum and rotating within the same, slots in said disk, which slots are eccentric to the centers of oscillation of the shells, pins in said slots, crosspieces carrying said pins and rods extending from said pins to the valves, cut-off devices in the valves and means for operating the cut-oflf devices from the adjustable eccentric, substantially as herein shown and described.

20. In a motor, a suitable journal-bearing, a suitable drum forming a supporting-frame fitted to and rotating on said bearing, a crank eccentrically arranged with reference to said bearing and within the drum, shells mounted in said frame and formed each with a cylinder and a valve-chamber, pistons fitted to the cylinders, rigid piston-rods connecting the pistons to the crank, valves in the valvechambers for controlling the motive fluid and means to operate the valves.

In testimony whereof I have hereunto signed my name.

GEORGE WHITE.

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