US695021A - Valve-movement for steam-engines. - Google Patents

Description

No. 695,021. Patented Mar. l l, l902.'

C. C. WORTHINGTUN VAEVE. MOVEMENT FDR STEAM ENGINES.

' (Application filed July 26. 1897.)

(No Model.) 5 Sheets-4M0 I.

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mums PEIERS ca. momma. wasnmmon, n. c,

No. 695,021. Patented Mar. n, I902.

I v c. c. wonmmerou. y I VALVE MOVEMENT FOR STEAM ENGINES.

(Application-flied July 28, 1897.)

(No Model.) 5 Sheet s$heet 2.

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THE mums mavens c0. PHOTO-LUNG" vnsmum'on, n. c.

m. 695,021. Patented Mar. n, 1902.

c. c. womumemu. VALVE'MOVEMENT FOR STEAM ENGINES;

(Application filed July 26, 1897.)

5 Shank-Sheet 3.

(No Model.)

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No. 695,021 Patented Mann, I902. c. c. wumnmm'ou.

VALVE MOVEMENT FOR STEAM ENGINES.

(Application filed July' 26, 1897.)

5 Sheets-Sheet 4..

(No Model.)

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Patentd Mar. ll, I902.

C. U.-WURTHINGTON.

VALVE MOVEMENT FOB STEAM ENGINES.

- A nmziun filed July 26, 1897,;

5 Sheets-8het 5.

(No MudeL) UNITED STATES PATENT OFFICE.

CHARLES C. WORTIIINGTON, OF IRVI NGTON, NEW YORK.

VALVE-MOVEMENT FOR STEAM-ENGINES.

SPECIFICATION forming part Of Letters Patent No. 695,021, dated. March 11, 1902.

Application filed July 26, 1897. Serial No. 645,905. (No model.)

To all whom it may concern:

Be it known that I, CHARLES C. YVORTH- INGTON, a citizen of the United States, residing at Irvington, county of Westchester, and State of New York, have invented certain new and useful Improvements in ,Valve- Movements for Steam-Engines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of the present invention is to provide an improved valve-movement for steam and'other expansion engines of that general class in which a single valve controls the admission and cut-d of the motor fluid at each end ofthe steam-cylinder, and, further, to provide an improved valve-movement for such duplex and other multiple cylinder di rect-acting-eugines by which the valves of each cylinder shall be actuated to cut 0d the motor fluid by the piston of their own cylinder and shall be actuated for the admission of motor fluid and released for the cut-off movement by the piston of another cylinder.

7 description will now be given in connection with the accompanying drawings, forminga part of this specification, and showing the movement applied in its preferred forms to a duplex direct-acting pumping-engine of the class now well-known as duplex pumps and to a single-crank pump, and certain modifications in the application of the invention and the features forming the invention will then be specifically pointed out in the claims. In the drawings, Figure 1 is a side elevation of a duplex pump provided with the improved valve-movement in its preferred form. Fig. 2 is a plan view of the same. Figs. 3, 4, and 5 are diagrammatic side elevations of the steam end on one side with the respective pistons shown in light and heavy dotted lines,

and showing the parts in different positions.

Figs. 6 and 6 are detail views showing/the parts of the valve-movement at the opposite ends of the cylinder shown in Figs. 3, 4, and 5 and in the position illustrated in Fig. 5.- Fig. 7 is an enlarged side view of the valvemovement at the left end of the cylinder shown in Fig. 5, with parts broken away to show the construction. Fig. 8 is an enlarged edge View of the same valve-movement looking to the right in Fig. 5. Fig. 9 is a similar View of the valve-movement looking in the opposite direction to Fig. 7 or to the left in Fig. 5. Fig. 10 is a detail section on the line 10 of Figs. 8 and 9. Fig. 11 is a side view looking to the right in Fig. 12, showing a construction by which the Valve is actuated for cutoff by the opposite side in case of accident to the cut-off connections or may be run without cut-off. Fig. 12 is an edge view looking to the left in Fig. 11. Fig. 13

is a side elevation of the steam end of a duplex engine, showing a construction in which the admission and exhaust valves are operated from a single rocker. Fig. 14: is a similar view'of a crank and iiy-wheel engine with the valve-movement actuated for admission and cut 0H by separate eccentrics on the crank-shaft and the cut-off controlled by a governor. Figs. 15 to show a slightlymodified construction in which the member actuating the valves for cut-01f has a straight= line movement. Figs. 15 and 16 are side views corresponding to Figs. 3 and 4 and showing the same positions of the parts, the valves and pistons being projected above the cylinders to show their positions. Fig. 17 is a side elevation of the valve-movement at the right end of the cylinder, partly in section to show the construction. Fig-.- 18 is a view on the line 18 ofFig. 17 looking to the left. Fig. 19

tion shown in Figs. 1 to 10, the engine shownis, as to general construction, a single-expansion duplex direct-acting pu mp having steamcylinders A A and water-cylinders B B on opposite sides of the pump, with steam-pistons a a connected to the plnngers of the water=cy1inders by piston-rods h b. The steamcylinders are supplied with steam through .with a projecting lug 12.

valve-chests at the top of the cylinders by induction-pipe O and exhaust through valvechambers at the bottom of the cylinder and exhaust-pipe D. The pump has compensating cylinders E, which may be of any approved form and supplied with fluid in any suitable manner, and these cylinders may be connected to the piston cross-heads c, as

shown, or connected otherwise, so as to act with and against the pistons, as usual. The steam-cylinders have the admission-ports 1 at the top of the cylinder and exhaust-ports 2 at the bottom of the cylinder, the'admission ports being controlled by oscillating Valves d and the exhaust-ports by oscillating valves e, separate ad mission and exhaust valves thus being used, as is preferable, at opposite ends of each cylinder and a single Valve at each end of the cylinder controlling both the admission and cut-0d. The valves d on each side of the engine are operated for the admission of steam by the opposite side of the engine and are operated for the cut-off by the same side of the engine.

The valves (Z are thusoperated in the construction shown by the following mechanism: Each valve-stem 10 of these oscillating valves has rigidly secured thereto or formed therewith a crank shown as formed by a sleeve f, which constitutes a crank-disk and is provided on one side with a circumferential groove 11, terminating in a shoulder 3, and Outside the crank f is mounted loosely upon the valve-stem 10 a sleeve g, having a crank-arm 13, carrying an inwardly-projecting stud 14, upon which stud is a spring-pressed catch 15, which is positioned to move in the groove 11 in the crank f and engage the shoulder 3 to actuate the valve for the admission of steam, and this catch carries on the inner side of the catchpoint a block 4, positioned to move inside the crankf. Inside the crankf is mounted another sleeve it, having a crank-arm 16, a circumferential cam-groove 5, arranged in line with the block 4, so that the block is in the groove during a part of the movement of the sleeve g, and a lug 17, positioned to engage the lug 12 to rotate the crank f and oscillate the valve for cut-01f. By this construct-ion the crankj, carrying the valve-stem, is rotated in one direction by the sleeve 9 through the engagement of catch 15 with shoulder 3 for the'operation of the valve for admission of steam. The catch 15 is then thrown out of engagement with the shoulder 3 by block 4 coactingwith the end of cam-groove 5 in sleeve 'h, so as to permit the return of the crank f,

and the crankfis returned by the sleeve h for the operation of the valve for cut-0E through the engagement of lug 17 on sleeve h with lug 12 on the crank f, as will be fully describedhereinafter in connection with the operation of the engine.

The connections for operating the sleeve 9, which may be called the admission-sleeve, and the sleeve 72, which may becalled the cut-off sleeve, from the'respective pistons are as follows: The two crank-arms 13 on the admission-sleeves of 'each cylinder are connected together by a link 18 and by link 19, connected to a crank-arm 20 to one of two crossover-shafts 'i, which are operated from the opposite sides of the engine by levers it, connected by links 21 to the cross-heads c, the crank-arms 13 on'each side of the engine thus being connected to the crossover-shaft i, which is operated from the opposite side of the engine.

Mounted upon the side of each steam-cylinder is a rocker Z, connected by links 22 to the crank-arms 16 on the cut-off sleeves h at the opposite ends of the cylinders, these links 22 preferably being made adjustable in length, as shown in Figs. 3, 4, and 5, so as to secure cut-ofi at the desired point in the stroke. Each of the rockers Z is connected by a link 23 to a crank-arm 24 on the crossover-shaft 2', which is operated from the same side of the engine, so that each rocker Z and the cut-01f sleeves h are operated from the piston of their own cylinder-that is, from the same side of the engine.

The exhaust-valves e of each cylinder may be operated from the opposite side of the engine by anysuitable connections, the stems of these valves being shown as carrying crankarms 25, connected together by links 26 and connected by link 27 to a crank-arm 28 on rock-shaft 29, having a crank-arm 30, connected by link 31 to a crank 32 on the shaft '11 operated from the opposite side of the englne.

The operation of the construction above described will be understood from the drawings, especially Figs. 3 to 10, showing the cylinder A with its valves in three different positions, in connection with a brief description.

As shown in Fig. 3, piston a has just begun its stroke to the left, the admission-valves (Z atthe right end of the cylinder having been opened for the admission of steam and the exhaust-valves ev properly shifted by the piston Cl, on the opposite side of the engine, the piston a being now at about two-thirds stroke and both the pistons moving to the left, as indicated by the arrows. As the piston a moves to the left from the position shown in Fig. 3 the lower or actuating arm of rocker Z, connected to the link 23, is moved to the left in that figure by the connection ofthis link to the crank-arm 24 on the shaft 71, which is operated from and moving in the same direction as the piston of cylinder A, and through the link 22 the crank arm 16 on cut-0E sleeve h at the right end of the cylinder is thus moved to the right, and by the engagement of the lug 17 on sleeve h with lug 12 on the crank f oscillates the valve to the right, the catch 15 on sleeve g having been thrown out of engagement with shoulder 3 at the end of slot 11 on crankfby the engagement of the block 4 with the end of the cam-groove 5 in the sleeve 72, and as the piston (it reaches the point of -cut-ofi,whicl1 is shown in the drawings as about half-stroke, the valve (Z is thus oscillated sufficiently to cut off the steam from behind the piston, the parts then being in the positionshown in Fig. 4 with the piston a at the end of its stroke and about to move to the right on the shifting of the valves in cylinder A by the piston a. As will be seen from a comparison of Figs. 3 and 4, this movement of the rocker Z does not change the position of the sleeve 9 at the left endof the cylinder A, the arm of the rocker Zwhichis connected to the crank-arm 16 of that sleeve swinging in such an are as to produce this result. As will be seen from a comparison of these figures, also, the piston ct thus finishes its stroke to the left from the position shown in Fig. 3 to that shown in Fig. t without action upon either of the valves 61 of cylinder A, although the sleeves g are thus rotated to the right, as the catch 15 at the right end of the cylinder has been thrown out of the groove 11 and moves freely over the outer surface of the crank f, and the catch 15 at the left end of the cylinder is simply drawn backward in the groove 11 of the crank fwithout moving the latter. As the piston a continues its strokefrom the position shown in Fig. 4:, it shifts the valves (2 and e on cylinder A for the reversal of the piston ct and (3031-. pletes its stroke without further control of the steam through either of the valves d of cylinder A, the arm of rocker Z, connected by link 22 to the crank-arm 16 on sleeve hat the right end of the cylinder A, now moving in such an arc as to move the crank-arm but very little, and-the movement of the cut-off sleeve hat the left end of the cylinder A by. crank-arm 16, link 22, and the. other arm of. rocker 1 being in the same direction as and moving with the crankfas the latter is movedby the admission-sleeve g, actuated bypiston a for opening the valve 01 atzthe'left endof the cylinder-A. In the shifting of the valve 01 at the left end of the cylinder A by the piston to for the reversal of the piston a the catch on crank-arm 13, carried by the sleeve g, engages the shoulder3-when the catch 15 is moved from the position shown in Fig. at to the end of the groove 11, and the crankf and valve-stem of this valve are then rotated to the left in the figures from the position shown in Fig. 4 to that shown in Fig.5, so as to open the valve at the left end of the cylinder Afor the admission of steam. This movement of the piston a does not afiect the position of the valve (1 at the right end of cylinder A, as the catch- 15, carried by sleeve 9 at: the right end of the cylinder, is then simply moved backward over the crank f and in the groove 11 therein. As the piston a, in cylinderA opens the admission-valve cl at the left end of the cylinder A it also reverses the exhaustvalves e on cylinder A for the next stroke of the piston through the connections previously described. All the parts are now in the posi- V tion shown in Fig. 5, with the pistons a a. both moving to the right. As the piston C6 in cylinder A moves to the right from the position shown in Fig. 5 it shifts the valve d at the,

left end of the cylinder to the left, so as to close'port 1 and cut off the steam by moving the lower arm of the rocker Z to the right, and thus through the link 22 and crank 16 rocking the cut-off sleeve h to the left in that figure, with the lug 17on sleeve h engaging lug 12 on the crank fon the valve-stem, this movement being permitted by the throwing out of catch 15 on crank-arm 13 from groove v11 in the valve-stem by the engagement of block 4 with the end of camrgroove 5 in sleeve h. This movement of the rocker I does not change the position of the crank-arm 16 and cut-0d sleeve h at the opposite end of the cylinder sufficiently to affect the control of the steam at this end. When the piston a has thus reached half-stroke, the steam is cut off and the parts again correspond in position to the showing in Fig. 4,. except that the valves at the opposite ends of the cylinder are removement also before'commencing to operate the valve by'engagement of the shoulder3.

This feature is important in such duplex direct-acting engines in which the length of the stroke is variable, and the admission member of the valve-movement actuates the valve during the middle part of the strokeof the piston on the opposite side and with lostmo:

tion at both ends of the stroke.v It will be understood, however, that when this valve movement is applied to an engine having a fixed length of stroke as, for instance, a.

crank and fly-wheelengine-+this lost. motion is not required, and it will probably be found preferable to arrange the parts so that the catch 15 has no substantial movement on either side. of theshoulder 3, but isysirnply thrown out at the proper time .to permit the 7.

return of the valve, and whenwithdrawn for the next. operationof the valveonly passes the shoulder so as to dropinto position to engage thelatter.

In Figs- 11 and 12 I have. shown in detail and indicated in dotted lines inFigs. Band 6 a feature which is preferably employed in all cases, bu t may be omitted, and is not shown in the other figuresin order to more clearly illustrate the rest of the parts. .consists in providing meansby which the valves at will be closed by thev admission- This feature sleeves g in case ofaccident to the cut-off connections or theirfailure to work for any reason and by which the engine maybe run. lowduty when desiredthat is, without cut-oil and admitting steam throughout the stroke. This result is secured in the construction shown byalug 50 on the admission-sleeve g, positioned to engage a lug 51 on the crank f, so as to move the valve d into position to close the admission-port on the return movement of the admission-sleeve in case the cutoff connections fail to act. In such case the admission-sleeve, after the catch 15 has been thrown out by the block 4 and cam-surface 5, moves onward with the catch on the outer surface of the crank f until the stroke of piston to is completed from the position shown in Fig. 5 and on the return movement of the admission-sleeve actuated by the piston a on its next stroke the lug 50 engages the lug 51 if the cut-oft connections fail to act and closes the valve at, this admission-sleeve thus actuating the valves din both directions.

If the engine is to be run low dutythat is, without the cut-off and admitting steam throughout the strokethis result may readily be secured by simply detaching the cut-01f rockers Z from the pistons, so that they will not be operated thereby and securing them in fixed positions, such that the sleeves h are held with the cam-grooves 5 in position to throw out the catches 15 at the proper time, in which position the lugs 17 will be out of the path of lugs 12, so as not to interfere with the movement of the valves, the admissionsleeves Q then acting to open one valve (1 by the catch 15 engaging shoulder 3 and to close the other valve (1 by the engagement of lug 50 with lug 51. In the construction shown and described above this position of the rocker Zis shown in dotted lines, the link 23 being shown-in dotted lines as detached from the crank-arm 24 and secured to the engine-cradle below the piston-rod to hold the rocker Z stationary in the proper position.

In Fig. 13 I have shown a slightly-modified construction in which the valves d are operated for the admission of steam by a wristplate m, connected to the'crank-arms 13 of sleeve g by link 33, and which wrist-plate operates also the exhaust-valves e, being connected to the crank-arms 25 by links 34. The wrist-plate m is connected to the shaft 1', actuated from the opposite side of the engine, by the link 35, corresponding to the link 19 of the construction previously described. In this modified construction the wrist-plate m, actuating the valves 01 for admission, is below the rocker l, by which these valves are actuated for cut-01f, so that for convenience the crank-arms 13 are below the valves and the crank-arms 16 above, the rocker Z being connected to the crank-arms 16 by links 22 and to the crank-arm 20 on shaft 1 actuated from the same side of the engine, by link 19, as in the construction previously described. The construction and operation of the sleevesfg h and their parts is the same as previously described and Will be understood withoutfurther description.

In Fig. 1 11 have shown a single-crank and fly-wheel engine with my improved valvemovement applied thereto, as in the construction shown in Fig. 13, except that the arrangement of the sleeves and crank-arms is varied slightly and the rocker Z is made adjustable and controlled by a governor, so as to automatically vary the point of cut-off in accordance with the speed of the engine. In this construction the rockerl and wrist-plate m are connected, respectively, by eccentricrods 36 37 to eccentrics 'n 0 on the crank-shaft F, carrying the fly-wheel G and actuated from the piston-rod 1) through crank 38 and link q. The rocker Z is pivoted on ablock 39, mounted to slide vertically in guides 6 on thevalvechamber and connected by link 7 to a vertically-oscillating bell-crank lever. 8, connected by a link 40 to another bell-crank lever 9, which is actuated by a governor H, which may be of any suitable form and actuated from the engine in any common or suitable vmanner, the connections being such as to lower the block 39 and secure an earlier cut off in case the speed is excessive and to raise the block 39 and secure a later cut-0ft if thespeedfalls. The operation of thisconstrnction will be readily understood from the drawings without detailed description, the eccentric 37 operating the wrist-plate m so as to open the valves cl at the top of the cylinder for the admission of steam and to open and close the exhaust-valves e at the bottom of the cylinder, and the eccentric 38 through its link 36 operating the rocker Z, so as to close the valves d and cut off the steam at the desired point, this point being controlled by the governor through the sliding pivoted block 39 and connections shown and above described.

The invention may be embodied in constructions in which the parts difier widely in form and movement from those shown, and it will be understood that the invention is not to be limited to valves of the oscillating class illustrated or to valve-movements in which the valve actuating parts move in curved paths. Thus it is obvious that the oscillating crank-disksf of the construction shown or other suitable members having an oscillating movement, so as to form cranks actuated by the valve-movement and actuating the valves, may not be connected directly to the valves, as shown, but may be connected to slide-valves or valves of any other movement by intermediate connections between the cranks and valves of form suitable to secure the desired movement, so that the devices shown may readily be applied to other than oscillating valves.

The oscillating or curved movement of the parts of the valve-motion also may readily be varied to a straight-line movement, if desired, one or both of the admission and cutofi members having such straight-line movement. For the purpose of illustrating this I have shown in Figs. 15 to 20 a construction similar to that shown in Fig. 13, employing oscillatingvalves and a wrist-plate m, actuating said valves for admission, and separate exhaust-valves, but with the cut-01f movement of-the valves d secured by a straightline movement of the cut-off members of the valve-motion instead of by the oscillating sleeves 72 of the constructions previously described. The same reference-letters are used in this construction for parts corresponding to those previously described, and'only a description of those parts did'ering in form or arrangement from those previously described is necessary. In this construction blocks 4 on the spring pressed catches run in grooves 41 in the stationary bearing-sleeves 'r of the valve-stems, while the catches 15 are actuating the cranks f for the admission movement, and the catches are thrown out by the cam surfaces at the end'of these grooves, thesefixed grooves and cams'therefore taking the place of the cam-grooves 5 in sleeves 71- of the construction previously described.' In place ofthe oscillating sleeves h having the projections 17, engaging the projections .12 on the cranksf, for the cut-off movement actuating members 8 are used,

having a straight-line horizontal movement, these actuating members consisting of lugs depending from a sliding support on bar t, moving in guides 42 and actuated from the piston on the same side of the engine bycorn nections similar to those previouslyde'scribed, the link 19 of the construction shown in Fig. 13 being connected to this sliding bar at any suitable point or connections of other suit able form being used. The lugs s are preferably made adjustable, so that the exact point of cut-oh. desired may be attained readily and with certainty. For this purpose any suitable construction may be used; but, as shown, the lugs s are mounted to slide-in slotted holders 43 and adjustable longitudinally in these holders by screws 44, passing through the lugs," a clamping-nut and washer 45 being used to lock the lugs in adjusted position. The operation of this construction will be readily understood from Figs. 15 and 16, in connection with the previous full description of the operation of the construction shown in Figs. 1 to 10, the parts being shown in Fig. 15 with the piston ctjust starting upon its stroke to the left and the piston apast half-stroke, moving in the opposite direction, and in Fig.16 with the piston a advanced-to about'half-stroke and the piston a at the end of its stroke. In the position shown in Figs. 15 and 1? to 20 the catch 15 on the sleeve 9 at the right end of cylinder A has just after the commencement of the stroke of piston a to the left, so as to return the crankf and valve-stem and out olf steam at the proper point, during which mov'ementof the crank fand valve-stem the catch 15 is out of the groove 41 and riding on the outer surface of crankf. On the return movement of the piston on the next stroke the same operations occur at the left end of the cylinder, the catch 15 at the right end of the cylinder being meanwhile returned by the wrist-plate m, so as to drop into the groove 41 in position to engage the shoulder 3 as the block 4 passes off the cam-surface at the end of'the groove, and the lug s at the right end of the cylinder being moved to the right to permit the next admission movement of the crankf and lug 12.

it will be understood that valves of different form and motion from those shown may be used and many other modifications made in the constructions illustrated without de parting from the invention and thatl am not to be limited to the exact form or arrangement of the devices shown;

What 1 claim is-- 1. The combination with an engine-cylinder and a valve controlling the admission and cut-off of the motor fluid, of devices connected to said valve for operating it for admission and disconnected from said valve to permit the return of the valve for cut-01f, and means actuated by a moving part of the engine for operating said valve for cut-off, substantially as described. I

2. The combination with an engine-cylinder and a valve controlling the admission and cut-otf of the motor fluid, of devices connected to said valve for operating it for admission and disconnected from said valve to permit the return of the valve for cut-off, and connections for operating said valve for cutoff by the piston of said cylinder, substan- 'tially as described. I

3. The combination with an engine-cylinder and a valve controlling the admissionand cut-0E of the motor fluid, of devices for operating said valve for admission having a catch connected to said valve during the admission movement and operated to release the valve for the return of the valve for outotf, and connect-ions for operating said'v'alve for cut-0d from a moving part of substantially as described. V I j 4. The combination with an engine-cylinderand a valve controlling the-ad mission and cutoff of the motor fluid, of a valve-actuating member having a catch for operating said valve for admission, means for tripping said catch lZOIJGllllll? the return of the valve for cut-oft, and a second valve-actuating member actuated by a moving part of the engine for operating said valve for cut off, substantially as described.

5. The combination with an engine-cylinder and a valve controlling the admission and cut-off of the motor fluid, of a valve-actuatthe engine,

valve for admission, 3. second valve-actuating member for operating said valve for outoff, and means carried by said second actuating member fortripping said catch to permit the return of the valve for cut-off, substantially as described.

6. The combination with an engine-cylinderand a valve controlling the admission and cut-off of the motor fluid, of a rocking valveactuating member having a catch for operating said "alve for admission, means for tripping said catch to permit the return of the valve for cut-off, and a second valve-actuating member actuated by a moving part of the engine for operating said valve for cutoff, substantially as described.

7. The combination with an engine-cylin' der and a valve'cont-rolling the admission and cut-off of the motor fluid, ot' a rocking valveactuating member having a catch for operating said valve for admission, means for tripping said catch to permit the return of the valve for cut-off, and a second rocking valveactuating member actuated by a moving part of the engine for operating said valve for cutoff, substantially as described.

8. The combination with an engine-cylinder and a valve controlling the admission and cut-off of the motor fluid, of valve-actuating members for operating said valve in opposite directions for admission and c'ut-ofl", means for actuating the member that operates the valve for admission and disconnecting said member from the valve to permit the cut-01f movement, and means for actuating the other member by a moving part of the engine for the cut-off .movement, substantially as described.

9. The combination with an enginecylinder and single valves controlling the admission and cut-01f at opposite ends of the cylinder, of separate valve-actuating members for operating said valve in opposite directions for admission and cut-off, means for actuating the members that operate the valves for admission and disconnecting said members from the valves to permit the cut-off movement, and means for actuating the other members by a moving part of the engine for the cut-off movement, substantially as described.

10. The combination with an engine-cylinder and single valves controlling the admission and cut-cit at opposite ends of the cylinder, of valve-actuating members for operat ing said valves in opposite directions for admission and cut-off, means for actuating the members that operate the valves for admission and disconnecting said members from the valves to permit the cut-off movement, means for actuating the other members by a moving part of the engine for the cut-off movemen t, and separate exhaust-valves and means for operating the same, substantially as described.

11. The combination with an engine-cylinder and avalve controlling the admission and cut-off of the motor fluid, of devices connected to said valve for operating it for admission and disconnected from said valve to permit the return of the'valve for cut-0E, connections for operating said valve for cut-off from a moving part of the engine, and a separate exhaust-valve and means for-operating the same, substantially-as,described.

12. The combination with two cylinders and single valves controlling the admission and cut-off of the motor fluid, of means for operating the valves of each cylinder for admission by the piston of the other cylinder and for cut-ofl by the piston of their own cylinder, and disconnecting said valves from one of said pistons for their movement by the other piston, substantially as described.

13. The combination with two cylinders and single valves controlling the admission and cut-01f of the motor fluid, of means for operating the valves of each cylinder for admission by the piston of the other cylinder and disconnecting the valves from said pistons for the cut-off movement, and means for operating said valves for cut-ott' by the piston of their own cylinder, substantially as described.

' 14. The combination with two cylinders and single valves controlling the admission and cut-off of the motor fluid, of valve-actuating members having catches connected to said valves during the admission movement and operated to release the valves for the return of the valves for cut-off, connections for operating said actuating members to operate the valves of each cylinder for admission by the piston of the other cylinder, and means for operating said valves for cut-ofi by the piston of their own cylinder, substantially as described.

15. The combination with a plurality of engine-cylinders and single valves controlling the admission and cut-ofi of the motor fluid, of valve-actuating members having catches and connections for actuating said members to operate the valves of each cylinder for admission, means for tripping said catches to permit the return of the valves for cut-off, and other valve-actuating members and connections for operating said valves for cut-off, substantially as described.

16. The combination with a plurality of engine-cylinders and single valves controlling the admission and cut-ofl of the motor fluid, of valve-actuating members having catches and connections for actuating said members to operate the valves of each cylinder for admission, other valve-actuating members and connections for operating said valves for cutoff, and means carried by said other actuating members for tripping said catches to permit the return of the valves for cut-off, substantially as described. 1

17. The combination with a plurality of engine-cylinders and single valves controlling the admission and cut-off at opposite ends of each cylindenof separate valve actuating membersfor operating said valves in opposite directions for admission and cut-off, means for actuating the members that, operatethe valves of each cylinder for admissionand disconnecting said members from the valves to permit the cut-off movement, and means for actuatingthe other members to operate the valves for cut-off, substantially as described.

18. The combination With'two engine-cylinders and single valves controlling the admission and cut-off of the motor fluid, of means for operating the valves of each cylinder for admission by the piston ofthe other cylinder and disconnecting the valves from said pistons for the cut-off; movement, means for op,-

- crating said valves for cut-cit by thepiston of their own cylinder, and separate exhaust;

- valves and means for operating the exhaust valves of'eaohcylinder by the pistonot the other cylinder, substantially asdescribed.

19. The combination with two engine-cylinders and single valves controlling the admission and cut-off of themotor fluid, of valveactuatingmembershaving catches connected to said valves during the admission move: ment and operated to release the valves for the return of the valves for cut-oft, connections for operating said actuating members to operate the valves. of each cylinder for admission by the piston of the other cylinder, means for operating said valves forcut-off by the-piston of their own cylindeiy'and sepiarate exhaust-valves and means for operating the exhanst-valves'ot each cylinder by the piston of the other cylinder, substantially as described. r

20. The combination with two engine-cylinr ders and single valves controlling the admission and cut-off at opposite ends of each cylinder, of separate valve-actuating members for operating said valves in opposite directions'for admission and cut-off, means for actuating the members that operate the valves of each cylinder for, admission by the piston of the other cylinder and disconnecting said members fromthe valves to permit the cutod' movement, and means for actuating the other members to operate the valves for out- OK by the piston of their own cylinder,;and

separate exhaust-valves and means for,operating the eXhaust-valves'of each cylinder by the piston of the other cylinder, substantiallyas described.

21. Thecomhination withtWoengine-cylinders and single valves controlling the ad mission and out-off at opposite ends of each cylinder, of separate valve-actuating members for-operating said valves in opposite directions for admission and cut-off, means for actnating the members that operate thevalves, of each cylinder for admission by the piston of the. other cylinder and disconnecting said members from the valves to permit the cut-oft movement, and means for actuating the other members to operate the valves of-eachcylininder for cut-oft by the piston oft-heir own cylinder, said other members being adapted -to be secured in a fixed positionfor the operation of the valves without cut-off, substa'ntially as described. 1 u r 22. The combination with two cngine cylinf dersand single valves controlling the admission and cut-off at opposite ends ofeach cylinder, of separate valve-actuating members for operating said valves in opposite directions for admission and cut-oit, means forac tuating the members thatioperate the valves of each cylinder for admissioirby the pistonof the other cylinder and disconnecting said members from thecvalves to permit the cutoffmovement, said members beingadapted .to closethe valves on their, return movement in case the valves are not closed by the members thatoperate the, valves for cut-ofi, and means foractnatingthe other members to operate the valves of each cylinder for cutoff bythe piston of their own cylinder, said other members being adapted to be secured in a fixed position for the operation of, the

valves without cut-off, substantially as described;

23. The combination With a plurality of engine-cylinders and "single-valves controlling- ,the ad mission and cut-oft at opposite ends of each cylinder, of separate valve-actuating members to operate the valves of. each cylinder for cut-off, substantially, as described.

24:. The combination with an engine-cylinder and a valve controlling the admission and,

cut-oi of the motor fluid, of a valve-actuatingmember having a catch for operating said vvalve for admission, at second actuating member for operating said valve for cut-oft, and:

means carried by said second actuating member 'for tripping saidcatchtopermit the re turn of the valve for cut-offpsaid second actuating member being adapted to'be secured in a fixed position for tripping said c'atchifor the operation of the valve withontcut-oft, substantially as described. a

25. The combinatiouwithan engine-cylin der and a valve con trolling the admission and cut oft of the motor fluid, of devicesforoper ating said valve for admission havinga catch connected to said valve dpringthe admission movement and operated to release. the valvefor the return'ot the valve for fcut oft', said 7 devicesbeing constructed to close the valve,

on their return movement it not previously,

closed, and connections for operating said valves by the engine for cut-off, substantially as described.

26. Thecombination with an engine-cylin- ;der and a valvecontrolling theadmission and,

cut-0E of the motor fluid, of devices for operating said valve for admission having a catch connected to said valve during the admission movement and operated to release the valve for the return of the valve for cut-off, said devices being constructed to close the valve on their return movement if not previously closed, and connections for operating said valves for cut-olT, said connections being adapted to be secured in a fixed position for the operation of the valve without cu t-oif, substantially as described.

27. The combination with a plurality of engine'cylinders and single valves controlling the admission and cut-off of the motor fiuid, of valve-actuating members and connections actuated by the engine for moving said valves in opposite directions for admission and cutoff and for closing said valves by the valveactuating members that operate the valves for admission in case the valves are not closed by the members that operate the valves for cut-off, substantially as described.

28. The combination with an engine-cylinder and a valve controlling the admission and cut-off of the motor fluid, of valve-actuating members and connections actuated by the engine for moving said valve in opposite directions for admission and cut-01f and for closing the valve by the valve-actuating member that operates the valve for admission in case the valve is not closed by the member that operates the valve for cut-oft, substantially as described.

29. The combination with two engine-cylinders and single valves controlling the admission and cut-off of the motor fluid, of means for operating the valves by the piston of their own cylinder for cut-01f and by the piston of the other cylinder for admission and for closing said valves by the piston of the other cylinder in case they are not closed by the piston of their own cylinder, substantially as described.

30. The combination with an engine-valve and a crank connected to said valve, of two reciprocating members actuated by a moving part of the engine for moving said crank in opposite directions, a catch through which one of said members engages said crank, and means for tripping said catch for the return of the valve, substantially as described.

31. The combination with an engine-valve and a crank connected to said valve, of two reciprocating members actuated by moving parts of the engine for moving said crank in opposite directions, a catch carried by one of said members for engaging said crank, and means for tripping said catch by the other member for the return of the valve, substantially as described.

32. The combination with an engine-valve and a crank connected to said valve, of a member rocking concentrically with said crank and engaging said crank through a catch, means for tripping said catch for the return of the valve, and means for actuating the crank by a moving part of the engine to return the valve, substantially as described.

33. The combination with an engine-valve and a crank connected to said valve, of two members rocking concentrically With said crank and acting to move the valve in opposite directions, one of said members engaging said crank through a catch, and means for tripping said catch by the other member for the return of the valve, substantially as described.

34. The combination with an engine-valve and a crank connected to said valve, of two members actuated by moving parts of the engine and rocking concentrically with said crank and acting to move the valve in opposite directions, one of said members engaging said crank through a catch, and a cam carried by the other member for tripping said catch for the return of the valve by said other member, substantially as described.

and a crank connected to said valve, of a reciprocating member for moving said crank in one direction, a catch through which one of said member engages said crank, means for tripping said catch for the return of the valve, a member for moving said crank to return the valve, and rocker Z linked to said last-mentioned member, and means for actuating said members by moving parts of the engine, substantially as described.

36. The combination with a cylinder and separate valves at opposite ends of the cylinder, of cranks connected to said valves, reciprocating members actuated by moving parts of the engine for moving said cranks in one direction, catches through which said reciprocating members engage said cranks, means for tripping said catches for the return of the valves, other members for moving said cranks to return the valves, and rocker Z connected by links to said last-mentioned members, substantially as described.

37. The combination with a cylinder and separate valves at opposite ends of the cylinder, of cranks connected to said valves, reciprocating members for moving said cranks in one direction, catches through which said reciprocating members engage said cranks, means for tripping said catches for the return of the valves, other members for moving said cranks to return the valves, and rocker l connected by links to said last-mentioned members, said rocker Z having a pivot adjustable to vary the operation of the valves, substantially as described.

38. The combination with a valve and crank f connected to said valve, of sleeve g having a catch engaging said crank to move the valve in one'direction, and sleeve h engaging the crank to return the valve and having means for tripping the catch to permit the return of the valve, and means for actuating said sleeves by moving parts of the engine, substantially as described.

39. The combination with a valve, of crank 30. The combination with an engine-valve IIC f connected to the valve, sleeve g having a catch engaging said crank to move the valve in one direction said sleeve carrying also means for engaging the crank on the return. of the sleeve to close the valve, means for tripping the catch to permit the return of the valve, and sleeve h engaging the crank to re turn the valve, snbstantially'as described.

L0. The combination with a valve, of crank f connected to the valve and having shoulder 3 and ing 12, sleeve g having catch 15engaging said shoulder to move the valve in one direction and sleeve h having lug 17 engaging lug 12and cam 5 for tripping said catch to permit the return of the valve, substantiallyas described.

4:1. The combination with a valve, of crank f connected to the valve and having shoulder 3, lug 12 and lug 51, sleeve 9. having catch 15 engaging said shoulder to move the valve in one direction and lug 5O engaging saidlug 51 to move/[he valve in the opposite direction, and sleeve it having lug l7 engaging lug 12- and cam 5 for tripping said catch to permit the return of the valve, substantially as described.

engaging said cranks to move the valves in.v

one direction, means fortripping the catches for the return of the valves, sleeves h engaging the cranks to return the valves, and

rockerl linked to said sleeves h, substantially as described.

43. The combination withvalves d at opposite ends of the cylinder of cranks connected to the valves, reciprocatingmembers havingcatches engaging said cranks to move the valves in one direction, means for tripping the catches for the return ofthe valves, reciprocating members engagingthe cranks to return the valves, and rocker Z linked to said last-mentioned members, substantially as described. 1

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES C. WOBTHINGTON. Witnesses:

ANDREW J. CALDWELL, -BoWEN W; PIERSON.

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