US987932A - Flow-motor and valve operated thereby. - Google Patents

Description

R. 1I.' WHITE. PLOW MOTOR AND VALVE OPEBATED THEREBY.

unicum: num nov'.1`z, 190e.

Patented m28i 1911 5 .State et'.

NITED STATES PATENT y OFFICE,A

BOLLIN H. WHITE, OF CLEVELAND, 011:10, AssIGNon, BY MESNE AssxGNMEN'rs, 'ro THE WHITE COMPANY, or CLEVELAND, OHIO, A CORPORATION OF OHIO.

Speeication of Letters Patent. Patented ltIar. 28, 1911-;

Application filed November l2, 1906. Serial No. 342,911.

. B. 't known that I, ROLLiN-H, Yrirrn, a ci iz'en of the United States, ,residing at Glaveland .in the county of Cuyahoga and hio, have invented a certain new and useful. Improvement in F1ow-Motors andYalves Operated Therety, el' which the following is a fullyclear, an ensei. descripH iqny This 'invention is intded paricuiarly for-lise es a,- part of an ap aretus for auto- :natically ogntrol'lin the ow Of water tO a steam generator an the flow of fuel to a burner for heating the generator,particu y when a paratus is a part of the steantproducing p ant of a, steam motor oar. The Objclvqf'the invention are, first, to preserve a definite quantitative relation betweent-he lfuel, allowed to passte the burner andthe water. allowed to pass into the-gen` erster-through the 110W motor; and., Secend to lirnit the rate of flow of water throu h the motor Sorbet it .Shall never exceed. tie capacity. of the generator, re ardless 0f lthe retest which Water is ferte` mtdthe flew.

motor casing u d The apparattlf of Whiehthe present inven- ,tion maybe a, art,- orms the ,sublect matters of en app ication filed contemporane- OUSlY with this application,

The present'invelltion consists of the coh-V struction 'and combinations of parts hereiinafter described and pointed out definitely iii-the Claims In the drawings Figure lis a central longitudinal sectional Vview of the'invention; and Fig. 2 is a plan view thereof. Figs. 3, 4; and 'are transverse sectional views in the,

planes oi lines -3a-3, 4 4 and 5:-5 respectively on Fig. 1. s I

' Referring to the parts hy letters A represents the motor easing having an inletopening a at onel end an anoutlet 'opening' of near the .other end,-said openings being referably through'the sides of the Casin gVithin the casing is p, piston B whic always occupies a positionA between said inlet 'and Outlet,-sad piston being snbject to the influence of a sprin C acting to force it toward theinlet en of the casing. There must be within the casing ,a restricted passage through which water may flow est the piston from the inlet to the'outlet eny s there ',of. This restricted passage may be'secured by making the piston ef smaller diameter h. This relief than thecasing, So that there will he sutl- .cient clearance between t stricted passage required by one or more holes b5 through the piston, as indicated in Fig. 1, or by'a horizontal groove a2 formed in the interior of the caslng wall, Any or all of these lsonstmotions indy be adopted ;f but only one of theni is necessary,-the preferred construction heing groove a2. Then Water is forced into t e casing through the inlet a the piston will e moved in Oppnsition to the spring. The

higher the rate at' which water is forced into' the casing,`the more rapidly will the water `flow. past Vthe piston through the re.- strieted passage; but" the pressure u mn the piston will be'co,rrespondmjgly grenier and consequently the pis(' 'u1 }vill lienimfwlfrom lts nornnll posit-ihn, which is'llonjn in Fig.

l; and the trovarne; t 'of the pist-0u from its normal OsltlQ-n will. be substantially .proportionL e to the rate of flow of, water through the motor casingpast said piston,A The up .er end. of this ca smg szlosed by a' screw png H through which ia e relie port 1s .normally close valve D, which is pressed to its seatoy a spring d. The stem d of this valve passes a part of the piston, an is provided with a shoulder d?, which is al opted to be engaged hy a shoulder 52 on the piston, aftertho lab ter has been rnoved a certain distance It follows; therefore, that' when the Vpiston moves still farther in the saine direction the valve D will he drawn open, thereby per" mitting some of the water forced into the Casing to escape therefrom through said relief port.

The specific construction. by. which the piston .is able to open the valve D, as shown nl the drawing, is as follows: The piston B is Iiirovided with a hollow stem 5, 'the upper en( Dort he. piston and cas. mg for the passage 0f seid Water- Th re may be provided' by .e-

of which is closed by-a. screw nut B.

The stem of the valve D passes loosely through this nut, and has a nut D screwmi upon its lower end. These two nuts ffm ish 'the shoulders d2 and b, before referred to.

Thedescrbed parts are to be so'propor tioned, and th spring C is to be under such tension, that when water is flowing through the motor casing at the maximalen mie at which it is gesired tol have it so flow, the two shoulders and b will be in contact. When waterie forced into the motor casing:

at a higher rate, it will move the piston still farther, and this will result in opening the valve D and permitting the excess of water to escape through the relief-port h.

A valve G is connected with the piston and its purpose is to control the rate of flow of fluid fuel through aport e which connects a passage e with a passage e2,-these two passages being formed in a' casing E which must be yfixed in definite relation with the flow motor. In the construction shown,

lit is rigidly fastened to two yoke arms a,

which extend downward from the screw plug a which forms the bottom of the motor casing; so that the axis of port e is alined with the axis of the'piston B. The stem g of the valve G passes through port e and through an alined'hole out of the top of the casing E and through a stuffing box K fitted thereto; then through another stufling box J intothe flow motor casing; and said stem is adjustably connected with the piston. It

, is preferably screwed into the piston a suitable Idistance and locked in position bythe lock nut F. The spring C, therefore, not only pushes the piston B upward in the motor casing, but it lso draws the conical valve G on the lower end of said valve stem g tight against its seat. The seating of the valve determines the position of the piston in the motor casing, and therefore determines the tension of the spring when this slight pressure due to the income of water will move the piston far enough to bring,- the 'tapered or reducedvpartv-of the valve stem G into the ort e, and thereby permitting a very sma lquantit of fuel to flow through said port. .The arther the. piston is moved by the water pressure the farther will this stem be moved through s aid port, and consequently the larger will be the opening through the port for the passage ofthe fuel. TheI gradual reduction in cross sectional'area'of the valve stem must be made with due regard for the size of the restricted opening a, and the tension of thers'prin'g C, so that whatever may be the actual rate of flow of water past the piston in the motor' casin the ratio between said flow of water and t e flow of fuel through the port e will remain constant.

Having described my invention, I claim:

1. The combination of 'allow motor whose casing has an inlet, an outlet, and a relief port at the inlet. end, a self closing valve for said relief port,'a movable piston within -the flow motor casing,-said piston and valve being res ectively provided with lshouldersv which will be brought into engagement by the movement of the piston to a predetermined position whereby a further Inovement, of the piston inthe same direction will cause a like movementnofvthe valve in the openin direction.'V j' 1 42. T e combination of a flow motor casin having an inlet and a relief. port at Yone end andan outlet at the other end, a movable piston within said casing, which will be moved by the waterliowmlg through said casing a distance proportionate to the rate of iiow of water t rough said casing, there beingwthin the casing a restricted passa e through .which water' may flow past t e piston fromfthe inlet to the outlet thereof a self-closing valve for the relief portf'S d valve and piston being provided-respectively with shoulders adapted to be brought into engagement 'after the piston has moved a deternlined1 distance in o position to its spring v,wherebyA 4the relie valve will be opened by 'a 4further movement of said piston, l l 3'. The combination of a flow motor casing having a relief port through one end, an

an outlet through its, side near the other end7 a piston 'within said casin a 'spring acting to move" it towardthe in et end thereof, a self-closing valve for the relief ort, and

two shoulders secured respectivey to theing extended loosely through said nut and -into the hollow stem of the piston, a nut adjustablywseeured upon the end of said stem, and a' spring actin to force the piston toward the inlet end o the casing,-tl1ere being within the casing a restricted assage through which water will flow past t e plstoni from the inletto the outlet of the casing. j The combina-tion of a liow motor casing having an inlet near one end, an outlet near the other end, 'a piston within said casing, n spring acting to forcethepiston toward the vinlet end of vthe casing,-there being 'within said casing a restricted passage' inlet through its side near said. end andnews2 a through which Water may flow past the urea upward from a point adjacent to said piston from the inlet tothe outlet of said fuel port. v. casing, a easing secured to said motor `casing In testimony whereof, I hereunto aHiX my and containing a port, a Valve for closing signature in the presenceof two Witnesses.

5 said, port having 'a stem which passes` ROLLIN H. WHITE.

through said port and enters the moto; cas- Witnesses: ing and is secured to said piston, saidste'm E. B. GILCHBIST,

l-be'mg of gradually` reducedoross sectional R. SULLIVAN.y

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