US1157081A - Valve mechanism. - Google Patents

Description

F..D.BUT LER. VALVE MECHANISM. APPLICATION FILED MAR. 5. 1915.

Patented 0er. 19, 1915.

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w/TNESS'ESI narran singes radianti enrich. 1

FRANK DAVID BUTLER, OF BUBLINGTGN, IOWA.

VALVE ifincrianisi/i.

T o all whom it may concern Be it known that I, FRANK D. Burma, a citizen of the United States, a resident of I Burlington, in the county of Des Moines and State of Iowa, have invented new and useful Improvements in Valve Mechanism,

of which the following is a specification.

My invention relates to improvements in valve mechanism and particularly, valve parts hereinafter described and then sought vto be defined in vthe appended claims, reference being had to the accompanying draw- I ing forming a part hereof and which shows merely for the purposes o-f illustrative d isclosure, a preferred embodiment of my invention, it being understood that various longitudinal section through a cylinder and changes may be made in practice withinthe scope of vthe claims, without digressing from iny inventive idea.

n .the drawings, .Figure l isv a vertical valve, vconstructed according to 'my invention; Fig. 2 is a vertical transverse section through a cylinder, valve and connecting ports orpassages; Fig. 3 is a top plan view of the valve; Fig. 4 is a vertical-loiigitudina 1 section of the'valve.

. I provide an'iiiiproved valve construction.'

which gives a double steam admission and a double exhaust, this being-.Controlled L particular form of valve. In Figf2, Athe section shows substantially half of a loco motive, 2 indicating the ange providingthe 'boiler seat, 3 being the steamr supply passage and 4; the exhaust passage, The steam supply passage leads into thehead of the steam chest 5, which is located'ontopof' the cylinder 1. The valve seat' G is as f shown, and provided with the pairs of passages or openings 7 and 8, which are com.

nected togetherl as shown, and leadinto the ends of the cylinder as at 9. These ports or' passages.serve falternately as inlet and eX'- haust ports-. At'opposite ends. ofv-'the valve -seat 6, 1 provide the passages'l, which conpacking rings 1&1: and 15.

- Specicatdn of Letters Patent. Patented @(313, 19,' 1915" Application filed March 5, 1915. Serial No. 12,269. v i

vey the exhaust .steam through the port l1 I y to. the exhaust 'passage at, these'ports being shown best in Figs. 1 and The. valve is ooeratedby the usual stem and 4connected 60 parts. This valve is substantiallyrectangu-- lar in shape as shown in Fig. 3, and has a central and. circular flange portion 12 which extends about the opening of the steam supply passage 3. This circular flange is provided with a shelf or seat 13 to receive the isa resilient ring split as at 16 and these rings are forced against the cover .of the steam chest by means of the weighted levers or arms `17170 pivotally mounted as at 18 on top ofthe valve, whereby a steam tight connection is' continuously maintained.

As stated before, the steam is admitted through the passage 3 into the chamber'or 7.5 compartment, provided .bytheI circular flange4 12. Anintermediate port or passage 19 communicates therewith and in' addition,

the end ports or passages 20 communicate therewith, these -last mentioned .ports being .80. formed in built-up or extended portions 2 1,

which extend acrossthe valve longitud# 1 inally, from 'end to., end, as shown Figs 3 ande, particularly.;v The exh'aust portsIPf-f. passages are indicated.' as '22 and open at "23, $5]

'outside of the chamber or compartment pro-1 vided by the circular flange v12.u It is Witli' this outer chamber or compartment, that is,

the one provided betweenthe-'walls of the l steam chest 5 and -thawalls'j of thef valve 90" itself, that the exhaust passages 10 com' municate.

It is to be notedt'liat the chamber or 'colin partinent provided by 'the crcular'fiange 12 ofthevalve is the live steam'A compartmentf95 and that the chamber-orcoinpartment providedV outside of this-circular ange 12'ai`id.

between the side Walls a 1id to,r of the steain chest may be termed: the exhaust steam coin'.-

zpartinent. T. unimportant featura-as 10- 0 fit materially assists inthe .prevention of steam leakage around thesteam chest kets, and valve steam packing. ..The-. operation ofthe valve gas- 1 particularly, itis seen. thatwhen the lvalve is positioned to the right, the forward s ideof the= pistonis open to live steam admissionetlirough the registration ofthe' foiward.4 and intermediate admission ports 19,116' and 20 with the forward '.cylnderj,ports` Z "iid 8 'It slkeiis Seen that. the reared@ -is obvious 'frein-the xabove description. Referring tofloof the piston is open to exhaust passages 10 and 11 by and through the opening allowed by the rear edge of the valve over the rear; cylinder port 7 and by and through. -the reg-* istration of the rear exhaust port Q2 in "the valve with the rear cylinder port 8. When the valve is going toward its closing position, its travel is back, the travel of the valve l being in the same direction asthe travel ofthe piston. Now then, when itrmoves to the position shown in Fig. 1, the cut-off occurs between said admission ports in lthe Vvalve and said cylinder ports previously described.

From the point of cut-off tothe point of release, shown in Fig. 1, expansion occurs on the forward side of the piston.v At the pointf release shown in' Fig. 1, the forward side of the piston isl about to be opened lto exhaust, hence the release, the reargsifile of the piston is being cut o from ,its exhaust. From position shown in Fig. 1, exhaust occurs on the forward side of the piston forl the remainder of the back stroke ofsai'd. pis.- ton and on the next forward stroke until the piston reaches a like position as shown in Fig. 1, forward of its central position. From position shown in Fig. 1 until the piston nears its back crank dead center, the space back of the piston is shut off, hence is on compression. As the piston nears its back crank centeryadmission occurs .to the rear side of piston by and throughthe registration of the rear admission port 20 and inter-" a slide valve which will give double admis-4 sion and doublel exhaust, whereby a very efficient mechanism of this character is provided.

What I claim is:

1. In combination with the cylinder of a steam engine, having inlet and exhaustA ports, a steam chest having a steam inlet connection, a valve for controlling the passage of steam from the inlet connection to the cylinder, said valve having a circular flange, a plurality of packing rings supported Abysaid flange, the lower'packing ring being split and a plurality of weighted levers .engaging said split ring to force the uppermost ring into engagement with the cover of the steam'chest to form a continuous steam tight fit. p

2. A slide valve for a steam engine having a body portion, a flange upstanding therev-from, said body portion having a plurality '-ofl steam supply ports with which the chamber or compartment provided by said upstandingflange, is in constant communication, said orts or passages serving as inlet passages orlive steam, said body portion also having ports or passages opening with- "out' said upstanding flange, .said ports or passages being exhaust portsorl passages.

cluding a` bodynportion substantially rectan- .v gular in shape and having a circular upstanding flangeQsaid body portion having' a 3.. A'slidev valve' forma steam engine, in-

pluralityv ofl built-up or extended, portions -which provide ports or passages communicating within said upstanding flangel and which provideinlet ports or passages for live steam, said body portion also having an additional inlet Vpassage locatedintermediate said `liist, mentioned `ports or passages and communicating Vwithin 'said upstanding flange, said body portion also having `a plurality of other ports or passages communi-.

cating without said upstanding flange and providing exhaust portspr passages for the exhaust steam.

4. lIn combination vwith a cylinder of. a steam engine having inlet and exhaust ports for each end, a reciprocating 4slide valve therefor, having an upstanding flange portion adapted to receive steam from the. source of steam supply, a plurality of inlet portsor passages communicating within said flange portion and adapted to register with said inlet and exhaust ports and said valve lhaving a plurality of exhaust ports communicating without said flange and adapted to register with said inlet andexhaust ports.

5. In combination with acylinder and steam chest of a steam engine, said steam chest being mounted on said cylinder and having a substantially flat valve seat with prts or passages communicating with opposite ends of said cylinder, a reciprocating slide valve fitting within' said steam chest and having an upstaiiding flange portion adapted to embrace the inlet from the source of steam supply, said valve having a plu-- rality of inlet ports or passages communicating withinsaid upstaiiding flange and adapted to register with said inlet and exhaust ports for the cylinder, said valve also having a plurality of exhaust ports communicating without said upstanding flange and adapted to register with said inlet and exhaust ports for said cylinder, these ports or passages being so arranged as to provide a double admission and a double exhaust.

6. In combination with a cylinder and steam chest of a steam engine, the steam chest being mounted on the cylinder and .having communication with a source of iso or passages leading to each end of said cylinder, a reciprocating-.slidcvalve positioned on said seat and having an upstanding flange engaging the top of the steam chest labout the 1nlet connection, said valve having a plurality of inlet ports or passages communicating. within said upstanding flange and adapted to register with the inlet and exhaust passages for said cylinder, said inlet ports or passages in said valve including a pair arranged on opposite sides of said valve and an intermediate port or passage, extending longitudinally across-said valve, said valve also having exhaust ports or'passages communicating with the steam chest without said flange portion and adapted to register with the inlet. and exhaust ports for said cylinder, said exhaust ports or passages in said valve being disposed between the side inlet ports or passages and the intermediate inlet port or passage in said valve, the eX- treme edges of the valve providing'an eX- haust opening and cut-off in the other of said plurality of inlet and exhaust ports of said cylinder, whereby a plurality of portsare provided for the admission of steamfto one end of the cylinder and a plurality of ports are provided forfthe exhaust of steam from the other end of the cylinder.

7. In combination in a steam engine, having a cylinder and piston, a steam chest thereon having communication with -a source of steam supply and with a steam exhaust, an enlarged flat valve seat provided in said steam chest, a slide valve mounted thereon. said cylinder having a plurality of pairs of inlet and exhaust ports or passages leading valve in constant communication with they chamber or compartment provided by said flange portioinand a plurality of ports or passages in said valve in communication with the chamber or compartment provided inthe steam chest lwithout the flange portion of said valve.

8. In combination .in a steam engine, having a cylinder'and piston, a steam chest thereon having communication with a source of steam supply and With a steam exhaust, an enlarged flat valve seat provided in said steam chest, a slide valve mounted thereon, said cylinder havinga plurality of pairs of inlet and exhaust ports or passages leading to either end thereof, said valve having a ange portion embracing said inlet connection, a plurality of ports or passages in said valve in constant communication with the chamber or compartment provided by said lange portion, and a plurality of ports or passages in said valve in communication with the chamber or compartment provided in the steam chest without the flange portion of said valve, said Hange portion of the valve having packing rings, and means for holding said packing rings against the top of the steamA chest about the inlet connection to form a' continuous steam tight joint.

FRANK DAVID BUTLER.

In the presence of*v GUY F. TOWN, f I). F. CARSPECKEN.

Copies of this patent may he` obtained for ve cents each, by addressing the Commissioner of Patents.

- Washington, D. C.

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