US1189537A - Slide-valve. - Google Patents

Description

F. D. BUTLER.

suoe VALVE. APPLICATION FILED :unzs. 1915.

Patented July 4, 1916.

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suns VALVE. APPLICATION FILED JULYZG, I915.

Patented July 4, 1916.

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SLIDE VALVE.

APPLICATlOH FILED 1ULY26. I915.

Patented July 4, 1916.

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SLIDE VALVE.

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Fl TTOR/VEVS FRANK D. BUTLER, OF BURLINGTON, IOWA.

SLIDE-VALVE.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed July 26, 1915. Serial No. 41,855.

To all :whom it may concern:

Be it known that I, FRANK D. BUTLER, a citizen of the United States, a resident of Burlington, in the county of Des Moines' and State of Iowa, have invented new and useful Improvements in Slide-Valves, off which the following is a specification.

My invention relates to improvements in slide valves for steam engines and the principal object is to provide a valve with a maximum port and passage opening for the control of the admission and exhaust of steam to and from the cylinders thereof.

A further object is the provision of a valve of the character specified, having a plurality of seating surfaces, each surface having a plurality of admission ports and a plurality of exhaust ports and passages so as to afford double admission and double exhaust to and from the cylinder of the steam engine through the ports and passages in each of said seating surfaces of the valve.

Another object is the provision of a valve packing that is economical in construction and maintenance and is efficient in aflording a steam-tight joint between the steam chest cover and the valve.

A further object is the provision of a combined steam chest cover and exhaust and inlet manifold, which Will reduce to a minimum cracking of the cylinder which is caused by the superheated steam in the ordinary arrangement of steam passages.

A further object is the provision of a steam chest with a plurality of valve seats, each seat having a plurality of inlet and exhaust ports or passages, leading to either end of the cylinder adapted to cooperate with ports or passages in the valve so as to provide double admission and double exhaust to and from either end of the cylinder.

To the accomplishment of the foregoing and such other objects as may hereinafter appear, my invention consists in the combination, construction and arrangement of parts hereinafter described, and then sought to be defined in the appended claims, reference being had to the accompanying drawings forming a part hereof, and which show merely for the purpose of illustrative disclosure, a preferred embodiment of my invention, it being understood that various changes may be made in practice within the scope of the claims, without digressing from my inventive idea.

In the drawings, Figure 1 represents a vertical transverse section of the cylinder construction of a locomotive steam engine, constructed to embody my invention, taken on line ll of Fig. 2. Fig. 2 is a vertical longitudinal section of that portion of the mechanism taken on line 22 of Fig. 1; Fig. 3 is a top plan view of the valve seats provided in the steam chest; Fig. 4 is a vertical transverse section thereof, taken on line 4-4 of Fig. 3; Fig. 5 is a longitudinal sec- -tion of the lower portion of the valve, the

seats therefor, and the upper part of the cylinder, taken substantially on line 55 of Fig. 1; Figs. 6 and 7 are similarviews, the valve being shown in different positions; Fig. 8 is a side elevation of the valve; Fig. 9 is a top plan view of the valve; Fig. 10 is a bottom plan view of the valve, connection of the same with the valve spindle or stem being shownin section to facilitate the disclosure; Fig. 11 is an end view of the valve looking at the end to which the valve spindle or stem is attached; Fig. 12 is a transverse section of the valve taken substantially on line 1212 of Fig. 9; Fig. 13 is an elevation of the other end of the valve.

Throughout the various figures of the drawings, the same characters of reference are used to refer to the same parts in the different views.

Referring now to the drawings, the numeral l designates the cylinder casting, which includes the cylinder 2 having the flat top portion 3 to receive the steam chest, having the connection 4 to the boiler for the admission of live steam and having connections 5 on either side thereof to the stack for the passage of the exhaust steam. The steam chest proper 6 is mounted on the fiat top portion 3 and has the steam chest cover 7, which is provided with the passage 8 registering with the passage 4 for the inlet of 'live steam and the plurality of passages 9 which register with the connection 5 for the passage of the exhaust steam. The steam chest proper 6 includes the base portion 10 which is secured to the flat top portion 3 of the cylinder casting by means of studs 11,

suitable gaskets 12 being interposed therebetween. The body portion 13 of the steam chest extends upwardly and is secured to the steam chest cover 7 by means of the bolts 14. This steam chest is provided with the intermediate valve portion 15 which valve portion comprises the two flat surfaces 16 which are inclined at substantially right angles to each other as shown particularly in Fig. 4. These are the valve seats which are provided with the plurality of ports 17 17, 18 18, 19 19 and 20 20, the ports of each valve seat being connected in pairs to the passages 21 and 21 and 22 and 22 which lead into the ports 23 and 24 at the opposite ends of the cylinder.

The valve proper 25 is actuated by means of the stem or spindle 26 passing through the head 27 and provided with a suitable packing 28. This valve is of general triangular cross section, being provided with a plurality of seating surfaces, corresponding to the valve seats 16 previously described, these seating surfaces being designated by the reference numeral 29. The valve is hol low for a portion of its length, having the compartment 30 which communicates with the live steam inlet 4 by means of the opening 31, which registers with the opening 32 from the passage 8. This opening is provided with the cylinder packing member 33 which has the resilient packing rings 34 and which has the annular flange 35 against which springs 36 bear to force said flange in the steam-tight manner against the under part ofthe steam chest cover, as shown in Figs. 1 and 2. These springs 36 are seated in recesses or sockets 37 formed in the top portion of the valve 25.

As stated before, the hollow compartment 30 is in constant communication with the source of live steam supply and a plurality of ports or pasasges lead outwardly from this compartment 30, said passages or ports being designated 38 38, 39 39 and 40 40. Located between said steam admission ports or passages just referred to, are the exhaust ports or passages 41 41, 42 42, which are formed by cutting away parts of the side portions of said valve member, as shown in Fig. 12.

The valve spindle or stem is connected to the valve by means of the studs 43 which are screw threaded on their inner ends and have the shoulders 44 with the reduced screw threaded outer ends 45, washers 46 bearing against said shoulders 44 and the securing nuts 47 engaging said washers. The stem or spindle has the extended portion 48 provided with the recesses 49, which are greater in diameter than the studs 43, so that the spindle and valve may have a slight relative movement. I provide between the valve seats 16 in the bottom of the steam chest, a

a groove or recess 50, which prevents the valve from riding on its triangular point out of its proper position, thereby assuring that the ports orpasasges will always register properly.

Assuming that the parts are in the relative position shown in Fig. 6, the operation is as follows. On the movement of the valve to the right, to the position shown in Fig. 5, live steam will be admitted from the connection 4, passage 8, into the compartment 30 and thence through the pairs of ports 38, 38, 39 39 in the valve and 17 and 17 and 18 and 18 in the valve seats to the passages 21 and 21 which discharge into the passage 23 into the right hand end of the cylinder, as shown in Fig. 5. The exhaust steam passes out through port or passage 24 into passages 22 and 22 and thence to the pairs of ports 19 19 and 20 and 20 to the exhaust passages in the valve 42 and 42 and by the edges of the valve into the compartment provided in the steam chest outside of the valve proper, and thence through the exhaust passages 9 to the connection 5 to the stack.

When the valve moves to the left, as shown in Fig. 7, the course of the inlet and exhaust steam is reversed; that is, the live steam being admitted through the compartment 30, ports 39 39, 40 40 in the valve, ports 19 19 and 20 20 in the valve seats to passages 22 and 22 and thence to the passage 24 to the left hand end of the cylinder, the exhaust steam passing through the passage 23 to the passages 21 and 21, ports 17 17, 18 and 18 in the valve seats, ports 41 41 in the valve and beyond the edge of the valve into the compartment provided in the steam chest, outside of the valve proper and thence through the exhaust passages 9 to the connection 5 to the stack.

It is therefore obvious, that I have provided a valve having a plurality of seats, each seat having a plurality of connecting ports or passages, whereby a double admission and exhaust of steam to and from the cylinder is provided; further, by utilizing the particular structure shown, the entire steam chest may be removed and also the valve and valve seats for the purpose of repair and examination in a very simple mannecting said pairs of ports with the opposite ends of'the cylinder, aslide valve of triangular cross section and having a pair of inclined seats, each seat having a plurality of live steam ports and a plurality of exhaust steam ports adapted to register with the pairs of ports in said seats, a steam chest cover having exhaust and inlet manifolds adapted to supply and receive steam to and from said steam chest.

2. In combination in a steam engine having a cylinder, a steam chest thereon having a pair of inclined seats provided with ports leading to the ends of the cylinder, a hollow slide valve triangular in cross-section and having a pair of inclined seating surfaces provided with inlet and exhaust ports adapted to register with the ports in said seats, a steam chest cover having exhaust and inlet manifolds, the inlet manifold opening into said hollow valve, a packing construction for said valve including a cylindrical body portion fitting into the hollow portion of said valve and having resilient packing rings, said packing construction also including an annular flange and resilient means bearing against said valve and said annular flange to force the same against the opening from said inlet manifold.

3. In combination in a steam engine having a cylinder with passages leading to each end of the same, a steam chest thereon having a pair of inclined seats, each seat having a plurality of ports leading to said passages to one end of the cylinder, a valve triangular in shape and having a hollow compartment therein, said valve having a pair of inclined seating surfaces and having a plurality of inlet ports on each seating surface communicating with said hollow compartment and a plurality of exhaust ports on each surface communicating within said steam chest,'said ports adapted to register with the pairs of ports in said seats in said steam chest, a steam chest cover having inlet and exhaust connections, said inlet connection supplying live steam to the hollow compartment within said valve.

4. In combination in a steam engine, a cylinder having a comparatively flat top and provided with an upper extension with connections for exhaust and supply of steam, said cylinder having passages to each end thereof, a steam chest mounted on said fiat top and having a pair of inclined seats provided with a plurality of ports communicating with said passages, a valve having a pair of inclined seating surfaces corresponding to said seats, said valve being hollow and having an inlet opening out of said hollow portion, a steam chest cover having passages adapted to communicate with said inlet and exhaust connections, said inlet passage communicating with said opening from said hollow portion, said valve having a plurality of ports on each of said seating surfaces communicating with said hollow portion to supply live steam to the cylinder and also having a plurality of exhaust ports on each seating surface communicating with the compartment provided outside of said valve for the exhaust of steam from said cylinders.

5. In combination in a steam engine, a cylinder, a steam chest thereon having a plurality of rectangular valve seats, a valve of triangular shape in cross-section fitting said seats and having an inner compartment, said steam chest having an inlet passage, said valve having a flanged packing member surrounding the opening of said inlet passage so that said inlet passage is in communication with said compartment, said valve dividing the steam chest into compartments outside thereof which are the exhaust steam compartments a plurality of ports leading from each enc oft-he cylinder to said seats, said valve having a plurality of ports leading from said inner compartment to said seats, whereby a plurality of passages are provided to each end of the cylinder.

6. In combination with a cylinder and steam chest of a steam engine, said cylinder having ports leading into each end thereof, said steam chest being mounted on said cylinder and having two rectangular seating surfaces arranged at an angle to each other and separated by a groove or clearance channel, each of said seating surfaces having a plurality of pairs of ports in communication with their respective cylinder ports, there being a pair of ports in each seating surface in communication with one end of the cylinder and a pair of ports in each seating surface in communication with the opposite end of said cylinder, said steam chest having a cover with inlet and exhaust passages in communication with the compartment formed between said inclined valve seats and the ends of said steam chest, a reciprocating slide valve fitting within said steam chest and having an upstanding packing member adapted to embrace said inlet passage in said steam chest cover, said valve having a plurality of inlet ports or passages communicating within said upstanding packing member and adapted to register with said inlet and exhaust ports in the seating surfaces, said Valve also having a plurality of exhaust ports communicating without said upstanding packing member and adapted to register with, said inlet and exhaust ports in the seating surfaces, these ports or passages being so arranged as to provide a double admission and a double exhaust through each seating surface to and from either cylinder end.

7. In combination with a cylinder, steam chest and steam chest cover having inlet and exhaust passages and a plurality of rectangular seating surfaces, a reciprocating hollow slide valve having two rectangular seating surfaces located at an angle to each other and fitting said seating surfaces of the steam chest, said valve having an upstanding packing member adapted to form a steam tight connection between the hollow compartment within said valve and the inlet passage in said steam chest cover, each of said seating surfaces in said steam chest having a pair of cylinder ports at each end thereof in communication with their respective cylinder ends, said valve having two outer ports and an intermediate port on each of its two seating surfaces and in communication with the hollow compartment within said valve, said valve also having two exhaust ports on each seating surface, said ports being located on either side of said intermediate ports and having communication with the compartment within the steam chest around said valve, said ports in said valve cooperating'with said ports in said steam chest and arranged as to give a double admission and a double ex- 1 mounted thereon having two rectangular seating surfaces located at an angle to each other and having a clearance groove between said seating surfaces, each of said seating surfaces having a pair of ports at each end thereof and in communication with the cylinder ports, said steam chest having a steam chest cover with inlet and exhaust passages therein communicating with the steam supply and exhaust, a hollow reciprocating slide valve fitting between said seats in said steam chest and having a steam tight connection between the inlet passage in said steam chest cover and the interior chamber in said valve member.

FRANK D. BUTLER. WVitnesses:

P. F. CARSPECKEN, LAURA H. CARLsoN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0.

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