US655096A - Governor cut-off valve for engines. - Google Patents

Description

No. 655,096. Patented July 3|, I900.

F. A. LARGE. GOVERNOR GUT-OFF VALVE FUB ENGINES.

W a. WW

(Application filed Oct. 27, 1899.)

(No Model.)

Noam n: s cc Pnoro-umo. WASHINGTON. u. c.

UNITED STATEs P TENT Orrros.

FRANK A. LARGE, on PITTSBU'RG, PENNSYLVANIA.

GOVERNOR CUT-OFF VALVE FOR ENQINE S.

SPEOIFICA'I'ION forming part of Letters Patent No. 655,096, dated July 31, 1900. Application filed 001:01961'2'7, 1899. Serial No. 734,916. (No model.)

To all whom it may concern:

Be itknown that I, FRANK A. LARGE, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful'lmprovement in Governor Out-Off Valves for Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to governor cut-off valves for steam-engines, and has special reference to a self-contained governor for rotary steam-engines. Y

The object of my invention is to provide a variable length to the opening in the valve of the governor for the purpose of regulating the supply of steam and the expansion thereof in the cylinder or piston-chamber of the engine by a simple and compact device.

My invention consists, generally stated, in the novel arrangement, construction, and combination of parts, as hereinafter more specifically set forth and described, and'particularly pointed out in the claims. 1 i

To enable others skilled in the art to which my invention appertains to construct and use my improved governor, I will describe the same more fully, referring to the accompanying drawings, in which Figure 1 represents a sectional view of the steam-chest of a rotary engine, showing my improved governor, applied, thereto.- Fig 2. is a plan or face ,view of the governor, looking in the direction of the arrow shown in Fig. 1 and showing the same removed from the steam-chest of the engine, andFig. 3 is alike view looking at the same side of the same and showing the face-plate thereof removed.

Like numerals herein indicate like parts in each of the figures of the drawings.

My improved governor is illustrated as ap-.

plied to a rotary engine, such as shown and.

described in an application for United States Letters Patent filed by Isaac V. Large on the 2d day of July, AD. 1898, Serial No. 685,008. A portion of such rotary engine is shown at 1, which has a cylinder or piston-chamber 2 therein, through which passes the main shaft 3, and a, steam-chest 4 is formed on one side of the piston-chamber 2, through which said shaft 3 passes and which communicates with said piston-chamber 2 by the steam-port 5. Fitting around the shaft 3, within the steamchest 4, is the valve 6, whichis formed of the circular casting 7, having the face-plate '7 secured thereon,which is adapted to fit against the inner wall 4 of said steam-chest 4 and form:a steamtight connection therewith. The face-plate 7 is provided with an annular recess 7 which is adapted to form a steamspace 7 between the face-plate 7f and the inner wall 4 of the steam-chest 4. Around the periphery 8 of said circular valver'oasting 7 is the loose, ring 8, which is provided with a segmental opening or slot 9 therein, which slot 9 opens into the steam-chest 4 on one side of the loose ring 8, so leaving said slot 9 entirely open on the periphery of said loose ring 8 or on a radial line from center of shaft 3. The valve-casting 7 of the valve 6 fits loosely around the shaft 3, but gets its motion and is held in place through a pin 11, secured on said shaft 3, engaging a segmental slot 12,

formed in the bore 10 of the valve-casting 7.

j The valve-casting 7 is formed hollow, as at 13, having placed therein a segmental pinion 14, which is mounted on a stud 15,secured within the casting 7, and is adapted to mesh with an internal segmental gear-face 16, formed on the inner. face 17 of the loose ring 8 around 3 the outer face 8, of the valve-casting 7. Piv? oted at one end 18' to a link 18, which is piv-v oted at19 to the body portion 14' of the segmental pinion 14, is thespiral or leaf spring 19, the opposite end of which is adapted to be secured or bear against a collar 20 on the 'valvercasting 7, and this collar 20 has a lug or flange 21,'whicl1' fits within the slot 9 of the loose ring 8. A centrifugal weight 23, having a recess 24 therein for fitting around the shaft 3, is connected to and formed as part of the A body 14' of the pinion 14, and the outside face 25 of said weight 23 corresponds to the same radius as the inner face of the collar 20 in the casting 7.

The use and operation of my improved governor for steam-engines is as follows: Steam being supplied to the steam-chest 4 in any desired manner will actv on. said valve, 6, and when the slot 9 is oppositethe steam-port 5, leading from the steam chest 4 to the pistonchamber 2, the steam willfiow or pass through the port 5 during the fraction of the revolution of the valve 6 equal to the length of the slot 9. As the steam-port 5 is at right angles loo slot 9 is passingacross the face of the port 5.

As the shaft 3'is thus revolved by the entrance of steam into the piston-chamber 2 from the steam-chest' t' through the port 5, the, valve 6, looselysurrounding said shaft 3, is made to operate therefrom by means of the pin 11, engaging the slot 12 in the casting 7i "of said valve, and such slot 12 is of sufficient length to provide for the different positions of the valve 6 when the engine is reversed. When an abnormal high speed of the engine is attained, the centrifugal force generated from the revolution of the shaft '3 will act to throw out the weight 24 on the pinion l ifrom the center or axis of the pinion 14 and shaft 3, so overcoming the tension on the spring 19, pivot-ally connected to the pinion 14 and link 18,and causing the loose ring 8 to move around within the piston-chamber 2 by reason of said 7 'segmental'gear-face 16 on the internal face on the casting? within the steam-chests inanopposite direction from that of the piston 17 of the ring 8 being in mesh with the se mental pinion 14. This reverse movement ofthe loose ring'S will cause the closing up or shortening of the steam-slot 9 in the ring 8 of the'va'lve 6 by means of the lug or flange 21 onthe'collar 20, whichtravels withinsaid slot; 9,1 thereby cutting off the steam from the steam-chest 4 to the piston-chamber'2 through the slot 9 and port 5 at an earlier point in the revolution of the piston in the chamber 2.- When the speed of the engine drops below normal, the conditions are exactly reversed, an'd'the falling or dropping of the weight 24; by reason of the tension on the spring 19 beinggreater than the centrifugal force of said i weight 24c, will increase the length of the slot 9in'the ring 8 from the flange 21 on the collar 20, caused by the reverse movement of the said'ring' 8, through the medium of the pin ion14 engaging the gear-face 16 on said ring 8 :andthe weight 24 and spring 19 being connect edito said pinion 14. The steam-space '7 between theface-plate 7 and the inner wall 4 of thesteam-chest 4 acts as a cushion for the steam therein, which passes from the steam-chest 4 around the shaft 3 and so acts to balancethevalve 6. g

"It "will thus be seen that my improved gov-' ernorfor steam-engines is cheap and simple in its construction and operation, and by its use the steam from the steam-chest of the engine can be so regulated or supplied to the cylinderor piston-chamber of the enginefrom the'valve of the governor as to insure the runningoftheengine at the normal speed re q-uired. The device is efiective and practical in its operation and contains veryfew parts','-so'insuring-its being less liable to get' out of order and allowing such partstobe made strong and durable. v

ton-chamber.

steam and the expansion thereof in ;inder or piston-chamber.

. cylinder or piston-chamber.

Various modifications in the construction and design of the various parts of my improved governor may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

What I claim as my invention, and desire tosecure" by Letters Patent, is

1. In governors for steam-engines, the combination with a steam-chest having a supplyport leading therefrom to the cylinder or piston-chamber of the engine, a shaft, passing through said-steam-chest and cylinder or piston :ehamber, and .a circular valve loosely mounted around saidshaft within the steamchest for regulating the supply of steam and the expansion thereof in the cylinder or pis- 2. In governors forstean1'-engin'es,the com bination with a steam-chest having asupplyport leading therefrom to the cylinder or piston-chamber of the engine, a shaft passing mounted around saidshaft within thesteamchest and provided with a, segmental opening or slot therein for regulating the supply of t-he 1 3. In governors for steam-engines, the combination with a steam-chest having a supplyport leading therefrom to-the cylinder or pisston-chamber of the engine, a shaft passing through said steam-chest and cylinder or piston-chamber, a valve castin g or collar loosely .mounted around said shaft and within said isteam-chest, and a loose ring fitting around 1 said casting or collar having a segmental opening or slot therein for regulating the-supply of'the steam and the expansion thereof inthe 4. In governorsfor steam-engines, the combination with a steam-chest having a supplyport leading therefrom to the cylinder or piston-chamber of the engine, a shaft passing through-said steam-chest and cylinder or piston-chamber, a valve casting or collar loosely mounted around said shaft and within said steam-chest, a loose ring fitting aroundsaid casting or collar having a segmental opening or slot therein for regulatin g -Su p y of steam and the expansion thereof in the cylinder or piston-chamber, and mechanismconnected to said casting or collar and loose ring for varying the size of the segmental opening or slot in the loose ring-according to the speed i of the engine.

'5. In governors for steam-engines, the combination with a steam-chest'having a supplyport leading therefrom to the cylinder or piston-chamber of the engine, a shaft" passing through said steam-chest, and cylinder or piston-chamber, 'a valve casting or collar loosely mounted around said shaft and within the steam-chest, a loose ring fitting around said casting or collar having a segmental opening or slot therein forregulating the supply of steam and the expansion thereof in the cyl- ICC inder or piston-chamber, a flange or lug on said casting or collar extending across the se mental opening or slot in the loose ring, and mechanism connected to said casting or collar and loose ring for varying the size of the segmental opening or slot in the loose ring by the flange or lug on casting or collar.

6. In governors for steam-engines, the combination with a steam-chest having a supplyport leading therefrom to the cylinder or piston-chamber of the engine, a shaft passing through said steam-chest and cylinder or piston-chamber, a valve casting or collar loosely mounted around said, shaft and within the steam-chest, a loose ring fitting around said casting or collar having asegmental opening or slot therein for regulating the supply of steam andthe expansion thereof in the cylinder or piston-chamber, a flange or lug on said casting or collar extending across the opening or slot in the loose ring, and a pinion on said casting or collar adapted to engage with theloose ring for varying the size of the opening or slot in the said loose ring by the flange or lug on the casting or collar.

7. In governors forsteam-engines, the combination with a steam-chest having a supply-- port leading therefrom to the cylinder or piston-chamber of the engine, a shaft passing through said steam-chest and cylinder or piston-chamber, a valve casting or collar loosely mounted around said shaft and within the. steam-chest, a loose ring fitting around said casting or collar having a segmental opening or slot thereon for regulating the supply-of steam and the expansion thereof in the cylinder or piston-chamber, a flange orlug on said casting or collar extending across the opening I or slot in the loose ring, a pinion on said casting or collar adapted to engage with the loose ring to vary the size of the opening or slot in said loose ring by the flange or lug on the casting or collar, said pinion having a Weighted arm connected thereto, and a spring pivotally connected to said Weighted pinion and to the casting or collar.

8. In governors for steam-engines, the combination with a steam-chest having a supplyport leading therefrom to the cylinder of the engine, a shaft passing through said steamchest and cylinder, a circular valve loosely mounted around said shaft within the steamchest for regulating the supply of steam and the expansion thereof inthe cylinder, and a cushioning steam-space between the valve and wall of the steam-chest for balancing said valve.

9. In governors for steam-engines, the combination with a steam-chest having a supplyport leading therefrom to the cylinder of the engine, a shaft passing through said steamchest and cylinder, a circular valve loosely mounted around said shaft within the steam chest for regulating the supply of steam and the expansion thereof in the cylinder, and a plate secured to said valve having a recess therein adapted to form a steam-space between the plate and Wall of the steam-chest for balancing said valve.

In testimony whereof I, the said FRANK A. LARGE, have hereunto set my hand.

FRANK A. LARGE.

Witnesses:

J. N. CooKE, JAMES L. WEHN.

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