US655737A - Fluid-actuated valve. - Google Patents

Description

No. 655,737. Mmm Aug. s4, mun.

J. mums.

FLUID ACTUATED VALVE.

(Application med Nov. 17, 1899.) (No Model.) 3 Sheets-*Sheet l,

No. 555,737 Patented Aug. i4, i900. J. B. RHDDES.

FLUID ACTUATED VALVE.

(Application led Nov. 17, 1899.)

3 Sheets-Sheet 2l (No Model.)

-1| lH u w; ...w 1 .i .n

Vyl r EE E E E.

Patented Aug. I4, |900.

J. B. BHDES.

FLUID ACTUTED VAMVE.f

(Application filed Nov4 17, 1899.)

3 Sheets-Sheet 3.

(No Model.)

. Vlauw EEEEE dramas JAY li. RHODES,

intr" AUSTIN, OF CHICAGO, lLlilNOlS. n

stemmers/irse vente.

SJEEMJIEIEUATIN forming part of Letters Patent No. (555,737, dated August ld, 1900.

l Application led November 17, 1899. Serial No. 737,338. (No modell) To all wiz/ont t may concern: y

lie it known that l, JAY l. RHODES, a resident of Harvey, county ot Cook, State of Illinois, have. invented a certain new and uscfnl` Improvement 'in Motivewliluid-Actuated Valves for Engines, of which the following is a speciiication. y

My invention relates to motivo-iluid-actuated engines in general, but more particularly to Stcam-pnmps, and especially to steam` pumps provided with steam-actuated reversing-valves. I

The objects oi' my invention are to provide a simple and highly-ellicicnt constructionv of steam-pump, to provide a construction tending to reduce the cost oi manufacture, to improve the working of the val-ve, to facilitato the admission and exhaust., and to provide certain details and features of improvement 'tendingwto render a device of this character serviceable and thoroughly reliable.

To the attainment of the foregoing and other useful. ends my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a side elevation of a steam-pump embodying the prineiplesof my invention, the cylinder and valve-casing or steam-chest being shown in vertical section. Fig. is a crossseetion on line t o; in Fig. l.

valve-casing on line y y in Fig. Fig. i is an enlarged view of the steam-actuated re vcrsingvalve, the saine being shown in longitndinal section. Fig. 5 is a cross-section of the valve on line e in Fig. e. Fig. (i is a view similar to Fig. l, but showing the piston at the limit of its stroke Vto the left and the valve. at the right, and in this View the valve is shown in longitudinal section.

In Figs. l and (l it will be understood that the right-hand portion of the pump, which is simply shownin outline, may be of. any known or approved construction and may comprise any suitable arrangement of valves, plunger7 duc., requisite to a pump of this character. The left-hand portion of the pump, which is shown in vertical section, comprises the cylinder A and the steam-chest or valve-casing B. The said cylinder incloses a spool-shaped or donble-headed piston C. The steam-chest Fig. 3 isa horizontal4 section through the central portion of the contains a spool-shaped reversing-valve D. Between the two heads oi' the piston there is, it will be'observed, suiiicient space to afford a chamber, and into this chamber steam is admitted at full-boiler pressure, as will hereinafter more fully appear. The rcciprocation of the piston is effected in the usual mannerthat is to say, by alternate admissions of steam to the opposite ends of the cylinderiei.4 Such admission of steam to the cylinder, as well as the exhaust therefrom, is controlled by the steam-actuated reversing-valve D. The piston is reciproca-ted by steam admitted from the valve, and the valve is actuated by steam admitted from the space between the two heads of the piston.V in. this way each serves as a valve for reversing the other. The system of ports and passages by which such action is obtained consists as follows: The valve-casing B is constructed. with a couple of end chambers Z1 and b, and leading from these two chambers to the ends of the cylinder are the two passages l .and 2. These passages serve alternately as'supply andexhaust passages, and for such purpose each leads from the inner end of a valve-chamber to and opens into one end of the piston-chamber d. .Further communication between the cylinder and steam-chest is afforded by a couple of passages 3 and e, it being observed that the former leads from the outer end of chamber h to and opens into the cylinder at a point somewhat insideof the port or passage l and that the latter leads from the outer end of chamber b' to and opens into the cylinder at a point a similar distance inside of port The cylindric middle portion d of 'the valve D is arranged to fit and slide in the cylindric opening or bore b2, which connects the two chambers .b and b and which is of course oi smaller diameter than the latter. (See Fig. 3.) This middle chamber bzis pro vided with three circumferential grooves 5, 6,' and 7, which encircle the valve. Grooves 5 and 7 serve as exhaust-passages and for such purpose are connected and arranged to open intothe common enhaust-passage 8. (See Figs. 2 and 8.) Groove 6, which occupies a middle position, is,'however, a live-steam passage and is connected with the steam-pipe 9 through the medium ofa passage-l0. A

-dgisks d and d2.

team to enter the constant-pressu re chamberin the pistonJ/,f The by-pass openings or passagesJQ and .113, which respectively' connect cham erh with Ipassage llandchamber b" with passage 2, co plete the system of portage in theQengine-ca ing. J'

' The/ steamy'.- actuatedh'reversing valve D,

which ccperates with the pprts in admitting v'ffxhausging# steam/to ad from the cylinspool-shaped or lijnd icmiddle portion d and the tvvo heads or Preferably the-'cylind ic portion d is made hollow and l V'provided'V ith a central )ivall or diaphragm d4,

" iA to nh 'diaphragm d4, are-designed to reg'gister alter- ,nptely vvithl"'groves 5-and 6 andi-6 and 7 for y ,purposeof' admittingr steam l." alternately portatil' and d1? aref. in constanteommunica-.

tion wi-ith-fthe chambers h and b', and the port-s d dfwhficlnit will be observed, open valve at either side of the Wallior lef/opposite fndsof the 'cyl'fnfden These ports intheffvagve also serve vs 'exhaust-pas- 'sagem/as Will Iire/fully appear from the fol- 'lewin-g which isltaydescription lof the operation between the chamberI b and the constant- In the val e being at ,the left, steam is entering tll it'aivhand ,end of the cylin; der by vif/ay of .peri ,lOl` groove 6, ports dgjin the'vafve, chamber d6 irl' the valve, ports dw;

in the valve, ycharhls'gr1)., andthe duct or passage 2. Ine-,this iiglireg'ftherefore, the/piston is travelinlfo the left and Jthe exhaustlfrom, the left-han end of the cylinder is escaping by way' ofi'passage 1, chamber b, ports d7 in 'the val.vee'l1amber d5 in the valve, ports als 'i'ir the valve, groove 5, and the ltimate exhaust-passage 8. vThe h'ead c of! the piston 'isi it will be observed, about to' uncover the nd to thereby e'stablix h communicaress ure chamber in the piston. The live team th'us admitted to the left of the valve 'will'shift the latter to the right, and the ad- Inisipland'exhaust of steaml Wi ll then be as Iiollovvs; InjFig. 6the pif'ston is shown Ilat the ,limit of its/'stroke' to the left, andthe valve,

tareas on o'f the aforesaid admission of steam ptits'left, is atj the right. With these relagive positions of the valve and piston live steamis entering altr-theI left of the piston by wa' i. of passage 10. groove 6, ports d8 in the va ve, chamber in the valve, ports 17in the valve, chamben'b, and the duct or passag l., Also intliis ligure the exhaust'from the i'ghtof the ypiston is escaping by Way of The'. heads or disks d and* f Z2 are held upon the ends of the cylindric i portion cl by means'fof nuts d3.

'passage 2, chamber b', ports d10 in the valve,

chamber d6 in the valve, ported9 in the valve, grbove 7, and the nal exhaust-passage 8. I t will also be seen that an exhaust has taken place from the right of the valve by way of passage 4, the right-hand end of the cylinder, passage 2, chamber b', ports d10, chamber d6, ported", groove 7, and the exhaust-passage 8, and the exhaust from the left of the valve when the latter shifts in such direction is of course permitted to escape in a similar manner by way of 4passage 3. In this saidf'Fig. G thepiston is therefore just starting on its stroke to the right. The movement of the piston to the right will cause' the head or disk c to cover the port 3, thereby cutting off the admission of steam from the constant-pressure chamber to the left of the valve, and at such time the valve would but for the bypass 12 flyfback to the position shown in Fig. 1 as a result of thepreponderance of pressure on the inner surface of the disk d. This by-pass 12, however, permits live steam to enter at the left of the Valve from the passage 1, and in this way the valve is maintained in the proper position until the piston has reacheddthe v'limit of its stroke to the right. The by-pass 13 serves in a similar manner to maintain the valve at the left While disk c' is passing port 4 and until the piston has reached the limit of its stroke to the left.

It will also beseen at this juncture that, for4 instance, Jthe valve when shifting to the right will pass or uncover by-pass 12 before bring- 6 and that consequently the reversal of the piston is in this case accomplished, primarily, by an admission of steam from the constantpressure chamber by Way of port 3, chamber In this lway the piston is eifectively cushioned at the end of its'stroke to theleft, and by reason of b3, by-pass 12, and the passage 1.

the ports 2, 4, and 13a similar result is of course obtained at the end of its stroke to the right. A

Thus it will bev seen that while I employ liveI steam for actuating the valve the construction of the latter is simple and, together with the arrangement of ports, dac., of a character to render the manufacture of the pump comparatively inexpensive. The two chambers in the valve serve alternately as supply and exhaust/passages, and the long bearingsurface'r afforded by the bore or opening h2 permits the valve to reciprocate smoothly and with but little weas In this Waylealage is avoided,v and,furthermore,the eonstructionis,

it'will be seen, such as to render the pump easy of repair. i l

Whatl claim as my invention is ICO 'ing the ports ds into-register with the groove '1. The combination of a cylinder, valvecasing, piston and steam-actuated reversingvalve, the said cylinder and valve-casing having suitable ports or passages for admitting and.' exhausting steam to and from the piston'- chamber, and, the Valve being provided with anylindric portion having ports which serve alternately as supply andexhaust passages llO for the cylinder.

2. The combination of a cylinder, valvecasing, piston and steam-actuated valve, the cylinder and valve-casing having suitable ports or passages for admitting and exhaustpiston-chamber,

ing steam to and from the and the said valve being ported and having a couple of chambers which serve alternately as supply and exhaust passages -for the cylinder. y

12.- The combination of a cylinder, valvecasing, piston and steam-actuated reversingvalve, the cylinder and casing having suitable ports or passages for `admitting and exhausting steam to and from the piston-cham.

ber, and the said valve having a reduced cylindric middle portion which slides in a borel oropening in the casing, and which is provided with ports serving alternately as supply and exhaust passages.

4.*The combination of a piston provided with a constantpressure chamber, a cylinder j and valve-casing having suitable ports or pas- 2 5 sages, and a valve which is actuated by steam from said constantpressure chamber and which is provided with a cylindric middle portion having ports which serve alternately as supply and exhaust ports. i

5. The combination of the spool-shaped piston and the spool-shaped valve, the cylindric middle portion of the latter being hollow and provided with ports whereby both. the live steam andv the exhaustfare conducted through the interior of said valve.

6. The combination of a cylinder, valvecasing, piston and steam-actuated reversin valve, the valve-casing having a central bore or opening provided with three grooves or channels which encircle the cylindric middle portion of said valve, and the said cylindric portion of the valve being provided with ports which coperate with said grooves or passages and which serve alternately as snpply and exhaust passages. Y

7. The combination of a recessed or chambered piston, a spool-shaped steam-actuated reversing-Valve, anda cylinder and valve-casing having the ports or passages l, 2, 3,' 4 and ll, and the by-pass openings 12 and 13; the valve being provided with ports which serve alternately as supply and exhaust ports, substantially as shown and described.

8. The combination of a cylinder, valvecasing, piston and steam-actuated reversingvalve, the cylinder and casing being provided with suitable ports or passages, and the valve being provided With ports which serve alternately as supply and exhaust passages for the cylinc er and .vhich also serve as exhaust-passages for the exhaust from the valve.

9. In combination with a suitable cylinder, piston and l valve-casing, steam-actuated reversing-valve D, having the chambers d5 and d and the lateral ports di, d8, df and d1, substantially as and for the purpose set forth.

10. AIn a steam or other motive-fluid actu'- ated engine, the combination of a cylinder and piston, the said piston being recessed or chambered to provide a'constant-pressure chamber, and thev said cylinder being provided With suitable ports or passages for admitting and exhausting steam to and from the ends oi' said cylinder, and also with a passage for supplying live steam to the said constant-pressure chamber in the piston; a

the spoolshaped steam-actuated reversing-valve which is subpiston arranged for reciprocation within said cylinder, the spool-shaped steam-actuated reversing-valve arranged for reciprocation Within said steam-chest, both the cylinder and steam-chest being provided with suitable portsor passages for admitting and exhausting steam to and from the said cylinder and steam-chest, and a passage being also provided forsnpplying live steam to the cylinder at a point between the heads of the pistong'and the said spoolshaped reversingvalve, which is actuated by steam admitted from the constant-pressure chamberin the piston, having a `hollov and cylindric middle portion which is ported to permit live steam 'to pass through the valve to the cylinder, and

which is also' ported to permit the exhaust ,les

from the cylinder to escape through @the said valve, substantially as shown anddeseribcd.

JAY n. encens'. Witnesses:

.An F. DURAND, A. A. DnvINn.

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