USRE5005E - Improvement in steam-engines - Google Patents

Description

G. H.. BAILEY @L` Hf H. BURRITT.'

A Impravedmednt in Steam-Engnes No. 5,005..y

Reissue@ July 30,1872) Vida j? L E, m

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UNITED 'STATES PATENT l*OFEIcEl I GEORGE E.. BAILEY AND HARVEY n. nURRimgoF NEWARK, VNEW JERsEY,

ASSIGNORS, BYV MESNE ASSiIt'Nll/IENCIS, OF 'ONE-HALF INTEREST T()V QITARLES M. BOLEN, THOMAS S.CRANE, AND F..K. DAY.

IMPROVEMENT iN `sTsAiii-lineales. l

Specification forming part ofLetters Patent No. 117.362diitcd VJuly 25, 1871; reissue No. 5,605, dated July SPECIFICATION- v steam-piston of the other pump. Our inven- To all whom it may concern: tion is designed to improve on this mode of Be it known that we, GEORGE H. BAILEY construction by making a single pump operate and HARVEY H. BUBRITT, of Newark city, in i'ts own steam and water valves, and yet sethe county of Essex and State of New Jersey, cure a. rest or panse of the pistons at each end have inventedcertain Improvements in Steamof thev stroke. Y

, Engines, of the class commonly used for pump- That our mode of construction may be fully ing water by the immediate attachment of a. understood, we will describe all the parts ot' steam and waterpiston to the same rod. the mechanism employed, referring to the These improvements relate to those parts drawing attached tok this application. of the machine which regula-te the entrance Figure 1 is a rear elevation of the steamand exit of the steam to and from the steamcylinder 0 of a steam-pump constructed accylinder, the piston of which, by its movecordiug to our plan, with a steamchest, E, atments, operates the pump attached to the matached to it, in which a piston-valve, F, operchine. Our invention relatesto that class of ates to admit steamto either end of the cylinsteam -pumps employed for forcing water der 0, as required. Fig. 2 is a side elevation against pressure as in pumping water into -of the steam-cylinder 0, with the steam-chest steam-boilers and into elevated reservoirs for E,va1ve A in its box, and valve-gearing I J water-works, or mains for the same. It is K L. Fig.3is a plan, showing steam-chestE well known 'that in such pumps a great dealA and piston-valve Fin section, so as to exhibit of jar is producedby the rapid movement of the arrangement of the steam-passages B U the water-piston, causing the valvesv at each and the exhanstfpassages Q. Fig'. 4 is an enend of the stroke to open and close suddenly larged and detached view ofthe rotating valve and the currents of water in the suction an A and the box in which it `,rotates, between discharge pipes to change velocity suddenly. the ports B C. Fig. 5 is a connected view of The object of our invention is to produce such the steam-cylinder O and water-cylinder P,

^ a. movement of the water-piston that all conone ei'id ot which is shown in the view. Fig. cussive action of -the valves and the water in 6 is a side sectional view of the steam-chest the pipes connected with the pump ,shall be E with the piston-valve at the end of its stroke, p

.y avoided. This we accomplish by a novel arso that steam is entering the passage Z to the rangement of valvegearing and novel cousteam-cylinder andthe exhaust-passage Z' struction of the val ves attached to .the steamis open, connecting with the opposite end of cylinder, the piston of which controls e'l'ectnthe cylinder O. -Y

a ly the movements of the water-piston. The The obJects of this mechanism are, tn admit valve-gearing described is operated by a consteam to the steam-cylinder at the beginning A nection with the steam or water piston, so as of the st-ieke, to cut off the supply of steam a to receive vau impulse before the. end of veach little before the end 'of the lstroke, and to close i stroke of the pistons. This movement is oomthe GOITQBPOUIUS exmust-P014;- at tha Same municated to a rotary valve, A, provided with time, (ahttle'before the end ofthe s troke,) so ports B and YO, for conducting live steam from as to prevent the escape of the outgoing steam the boiler to either end of the steam-chest E', and cushionV 1n the cylinder on what remains in which a piston-valve, F, is arranged to supconned,'u1 ordern) bring the piston to rest ply steam to the steam-piston of the pump in Bti-.Slly $1,151 qllletl The -tlme ll f0l i `auch a manner as to bring the steam-'piston to this cushioning, and the .pausepf the piston l rest at each end of the stroke. This resi: or at the eudof the stroke, is obtained by. makpause ofthe pistons in a. steam-pump has been Aing the parts ot' the Y piston-valve (marked in produced hitherto y connecting two pumps Fig-3 as F FF Flthat cover the steam-ports together, in sucha manner that the'valve- Z Z (Mill thBHGXhBUBt-Ports Q) 0f a greater gearing on encli pump was operated by the` width than the stenmports themselves; and

this time is further regulated by a reguf lating-valve, T, Fig. 1, which controls the rapidity with which the valve F makes its movements in chest E. Supposing all the parts of. the pump to be in a, central position, as shown in Figs. l to 5, and the steam to be ad mittcd to chest E by inductionpipe G, if the valve A be then turned so as to admit. steam to port l, the cii'ect of that steam is to move the piston-valve F into the position shown in Fig. 6, where steam-port .Z` (admitting steam to the rear end of the'main vsteam-cylinder) is shown open to the livesteam chamber G', and steam-port Z' (allowing the escape of exhaust steam from the front end of steam-cylinder) is Vshown connecting with the space Z" ,between two of the parts o f the piston-valve F. This space Z",`when the valve F stands as in Fig. 6, also connects with the main exhaust Q', thus making an open communication between the cylinder 4O andA the air (or condenser, if the exhaust steam is to be condensed.) With the steam and exhaust ports in this condition, the steam-piston Y makes its forward stroke until the .arrnM attached to piston-rod N strikes the collar X' on valve-shifting rod L. This moves the rod L, knocker or dogi K,i'rog J, and valve A so as to open steam-port U, and admit steam into v chest E to move piston-valve F.` It will be noticed that when the valve A is moved to open port U it also brings chamber NV into communication with passage yI) and port H. This H is the exhaust-port for steam-chest E, (required for the discharge of the spent steam trst used to give motion to valve F,) and it opens directly into passages S and R, which lead to the main exhaust-outlet `Q of the cylinder O. But before theexhaust steam from either end of chest E can' pass from passage H into S, it vmeets the face or button-disk of regulating-valve T, which may beset more or less open, at the will of the operator; and it is evident that the rapidity with which the piston-valve F moves in its chest E s'o vasilo close the port that' supplies one en of the cylinder 0 with steam and opens the port to supply the other end) will depend upon the opening of this valve T, which' regulates the escape of steam from the `end of chest E, to-

ward which the valve F is moving. As it is possible to rotate valve A from one of its usual positions to the other with a very small movement of rod L and arm M, it is easy to secure the opening of the port B or 0 before the piston-valve F (cheeked in its motion by the regulating-valve T) has entirely closed the -steamport Z or Z'; but even after that port has been closed the steam already' in cylinder 0 may produce motion of piston Y by its expensive force. As observed, the faces of valve F are made much wider than the ports Z Z' and Q Q'. The eect of this construction is to closethe exhaust-port Q or Q' by the irst part of thevalves motion F and then. the remainder of the motion (the time of which is wholly controlled by valve T) is occupied by the passage of the lap of the valve over the closed port. Dnrin g all this time, the exhaust being closed, the pistonYis cushioning against ythe'exhaust steam confined in the cylinder,

and is thus brought to a state of rest without concussion, the duration of this rest being easily controlled by valve T, which permits valve F to take any time .desired to complete its travel and throw live steam into the cylin-v der to start the piston in the opposite direc; tion. It will be noticed that the piston-valve F requires a cover, F" and F' (which might be made continuous,),attache to it, (shown in Figs. 1 and 3,) to cover the exhaust-ports Q and Q' when at the extreme ends of its stroke. A small recess, with plunger fitted to it, might be made in each end of the chest E, to check the motion of valvelF at the ends ot' its stroke and avoid concussion with hard metal. The steam from main steam-chest E is admitted to valve A by an opening marked V on Figs. 1 and 2. I is the stem of the rotating valve'A, by which it is turned in itsl box.

Having thus full yy described the nature and objects of our invention, what we claim, and' desire to secure by Letters Patent, is as follows, observingthat, although ywe have shown the application.' of this steam mechanism simply to a water-pump, we do not confine ourselves to any particular application 'ot' our invention v Claims. Y

'1. The piston-valve F, as described, with four pistons and cover F" and F"-'.

, 2. The combination of the rotating valve A with the piston-valve F, as described.

3. The valve-chest E,constructed with steaminduction port G, lpasszuges V Q Q', and 'eduction-ports Zand Z', arranged substantially as shown and described. c A I c 4. A regulating-valve, T, when used in combination with apiston-valve, to regulate the discharge of the exhaustV steam which has been. used te give motion thereto.

G. H. BAILEY. Y H. H. BURRITT. 'Witnessem c Fnnnx. K. DAY, THos. S. CRANE.

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