US1076256A - Steam-engine valve. - Google Patents

Description

- E. P. WILLIAMS.

STEAM ENGINE VALVE.

APPLICATION FILED MAY 13, 1913.

1,076,256, Patented 0013.21, 1913.

ATE FQ lnnwm' WILLIAM-8,0]? new, rniinsizii vamle swam-ENGINE VE. I

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mammalia 13,1913. 'seri 1nd. 'z e'zlsie Be it 'lmown that I,- EDWIN eitiien of the United States residingfat. Erie; in the C01U1 t-y ,0f"Efi"e and State; of Pennsylvania, have. inventeti. certain newand useful Improvements in Steam-Engine Yalves, of .Whichthe following is a specifica- This invention relats fto steam -'engine alves and is illustrated as applied to valves of thepiston: tyne, operating in connection with a steame ngine oylinder having or hav: I not a middle or mainexhaust port oozitrolled byithe nia'i'n piston intl1e cylinder,

with auxiliary ioztsflocatedhnear; the .eppo- {site-endsof-theieylirider.

--Th' vention comprises i separate inlet and outlet valves, operating ionv the same seats; and mounted on the same rod, th e inlet yal$'es being; rigidly connected to the rod, land J the. outlet valves, having a slight lost motion 011- the rod; whereby the exh aust 'iialtfeiialthough operated mainly by the rod,

have someffre'edom of'm'ovement or lostmotion in the direction of the rod movement.

' Thereby theexhaust ralves are caused to 'lag I behind the movement-ofthe steam YfilVES.

ffton at B.

': cates with the cylinfierthrough-a middleex andithis' lost motion' has the effect of retard;

ing'li'oth the opening aml closing of the ex haust, Whichis What the-invention isinteniied hoaccomplish; ::That is it causes a'later exhaust ac'tlon than would occur "at thesame -eut .ofi with an ordinary governor mechanism, mi this gle'layecl exhaust action pre' vents 'ct1onabl'e. excessive compression iiieikle itto the ordinary result of the exhaust. aiction-at the shorter cut oil's.

Infernal to cause theexhaust value to fol-- low the inlet valve and to take up the lost mot-ion at or about the'e'nd lot the stroke I p ovide means for admitting steam intothe mtery'ening spaces between the inlet and e haiust "valyes when the valve: movement :hringsthenijin position to register said Spaces with holes cylinder.

communicating with the The accompanying drawing-"is a longitudinal section of the 'valveapplied to the cylinder of an-engine'of the type referred to.

a The cylinder is indicated at- A and the pis- C is the inletpipe to the D is the exhaust pipeleading from central exhaust. spaee"F= which communisteam cha'nihers E at the ends ofthe cylinder. a

the

.1 haust or poritsK-tahieli are coveredand" .WiLLIAMs,

uncoi'eredhy-the piston Has it reciprocate's.

the inlet valves Land J fixedfto ithe valve rod-H and admitting live steam from the cha bers Ewhen'the arts are uncoyered'by said valves. I

R- and S r auxiliary eithaust aortishea tween themiddle port K an-cl'the entlsof the cylinder, and; these ports are'contrcllecl, by

the val i'es K1 and I which are. connected by a- .sleeveG aroundth rod H ,'-and act; to coverand uncover said ports to dose or open co'n1-.

. O and P are; holes dr lled from the cylm munication with the exhaust space? F.

'der to the valve-seats.

from the valves- J and L; and the ports; 0

and P" communicate with these spaces when :they register-,5 Thespace permits a cert'am The talves and I .arespa'cecl slightly .Talid-iN-are theinlet hortsgcontrolled byv amount of lost motion or delay in the. move-i mentot. the valves'K and I asthe valve rocl vis reciprocated, and this lost inotio'neiiects v the delayed action. of the exhaust. V

The drawing shows thevalves at mid strokeg Assuming that the valves.- are moving to the right and the piston B to the left,

the exhaust R is about to-he closed, and compression begins in the crank end of the cylinder A. W The valve Kis' close 1;) to. the valve L, which delays theclosing o the exhaust, aswell as a delayed opening ofthe exhaust port S bythe'val-vel at 'the other end, said valve-Tinting hacked or dragged away from the inlet valve J. WVhen the i'a'l'v'e' has moi'erl-suiticiently to register the hole 0 with the slight space between the .valt-es K and. L,the.Icompression will enter haust valves la and 1 to travel forwardly r through said opening'O ancl' force the ekfollow until the'valve Iji s nearly in contact with the valve J. The movement will be-a irested by llIE'COIDpIkSSIOD between the valves I and J so that thetwo valves will not strike or come ln'actual contact. There Wlll thus Y. in the other. direction. a

, In case the exhaust valves aienot setoi'er by the compressed steam withinthe cylinder (assuming that itmight not be of-suflicient; force) it will surely beset overfhylthe-livesteam admitted during the earlier expansion as the space between the valves passes. the hole 0 or P during the'earlier part of the reverse stroke. it will he -understood that when thevalves K and l uncover the ports ltand S respectively the auxiliary exhaust =takes place into the'central exhaust chamher F. There is thus provided an automatic movement of the exhaust valves to produce a delayed exhaust without the necessity for s ecial controllin mechanism for that uri:

pose.

What I claim as new is:

1. The combination with an engine cylinder having separate inlet and exhaust ports, of inlet valves controlling the inlet ports, means to operate said inlet valves, and separate exhaust valves controlling the exhaust ports, said exhaust valves being movable with, and operated'by the same, means as the inletvalves, and having lost motion with respect thereto, to delay the operation of said exhaust valves. M

2. The combination with an engine cylinder having separate inlet and exhaust ports opening at the same valve seat, of separate inlet'and exhaust valves controlling said .ports and movable on the same seat, the exhaust valve having lost motion with respect to theinlet valve, to delay the action of the former. a

3. The combination with an engine cylinder having separate inlet and exhaust ports opening at the same valve seat, of separate inlet and exhaust valves =controlling said ports and movable on the same seat, the exhaust valve having lost motion with respect to the inlet valve, to delay the action of the former and means to take up such lost motion, after the action of the exhaust valve with respect to its port.

' 4. The combinationwith an engine cylinderhavingseparate inlet and exhaust ports, separate inlet and exhaust valves controlling said ports respectively, the exhaust valve having lost motion to delay its action with respect to the inlet valve, and means to takev up such lost motion by pressure admitted from the cylinder.

5. The combination with an engine cylinder having separate inlet and exhaust ports to each end thereof, a reciprocating valve rod, inlet valves fixed to said rod and controlling said inlet ports, and exhaust valves mounted on said rod and operated thereby, and having lost motion with. respect thereto, to delay the exhaust action.

6. The combination with an engine cylindr r havinp' separate inlet and exhaust ports to each end thereof, a reciprocating valve rod, inlet valves fixed to said rod and cohto each end invents trolling said inlet ports only, and exhaust valves mounted on said rod and operated ,thereby-and controlling the exhaust ports only, and having lost -1notion.with respect thereto, to delay the exhaust action, and means to admit pressure behind said ex hanst valv a, to take up said lost motion, after the act -on thereof with respect to the exhaust ports. Y

Z. The combination with an engine cylinder having separate inlet and exhaust ports thereof, of a reciprocating valve rod, piston inlet valves mounted on said rod and controlling the inlet portsP'only, and piston exhaust val ves connected together and loosely mounted on said rod'loelween the inlet valves, contfolling the exhaust portsonly, the exhaust valves being spaced lrom the. inlet valves to permit lost motion of the former witli respect to the latter, as the rod is reciprocated.

S. The combination with an engine cylinder having inlet and exhaust ports to each end thereof, oit a reciprocating valve rod, piston inlet valves mounted on said rod and controlling the inlet ports, and piston exhaust valves connected together and loosely mounted on said rod between. the inlet valves, and controlling'the'exhaust ports, the exhaust valves being spaced from the inlet valves to permit lost motion of the rormer with respect to the latter, as the rod is reciprocating and openings communicating with said cylinder independently of the said ports and adapted to register with the 4 .der havin inlet )orts at omosite ends thereof, and exhaust ports spacedfrom each. end, of a reciprocating valve rod, inlet valves thereon, controlling the inlet ports, exhaust valves loose on said rod located between and spaced from the inlet valves, and having lost motion with respect thereto, and openings communicating at one end with the cylinder between the inlet and exhaust ports and. at the other'end with the space between the respective inlet and exhaust valves at aoer tain period of travel of said valves,".to-. admit cylinder pressure to said space and take up said lost motion. I

in testimony whereof, I do aifix my signature in presence of two witnesses.

Wit ucsscs Gunners G. Bnnvinninn, ll. Cxnnson.

nnwnv r. vvinnnins.

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