US364708A - d avisos - Google Patents

Description

(No Model a SheetS-Shee t 1.

G. W. DAVISON.

MEANS FOR CONTROLLING THE SUPPLY OPATOMIZED FUEL.

Patented June 14,1887

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- MEANS FOR CONTROLLING THE SUPPLY OF ATOMIZED'FUEL. No. 364,708.

Patented June 14, 1887 or, wasvkn um n. c.

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MEANS FOR CONTROLLING THE. SUPPLY OF ATOMIZBDIFUEL. No. 364.708. Patented June 14, 1887.

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. UNITED STATES PATENT OEFicE.

GEORGE W. DAVISON, OF- ROCHESTER, NEW YORK, ASSIGNOR TO THE ROCHESTER MACHINE TOOL WORKS, OF SAME PLACE.

MEANS FOR CONT'ROLLING THE SUPPLY OF ATOMIZ ED FUEL.

SPECIFICATION forming part of Letters Patent No. 364,708, dated June 14-, 1887.

Application filed February 11,1886. Serial No. 191,627. (Nomodcl) To all whom it may concern.-

Be it known that I, GEORGE W. DAVISON, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement "in Means for Controlling the Supply of Atomized Fuel, which improvement is fully set forth in the following speciticatiomand shown in the accompanying drawlugs.

The object of my invention is to produce a means for controlling the supply of atomized fuel for steam-generators and other purposes,

the same being hereinbelow fully described, and more particularly pointed out in the claims.

Referringto the drawings, Figure 1, Sheet 1, is a'side elevation of an upright steamboiler in which atomized oil is employed as a fuel, there being shown a reservoir for the oil, an atomizerfor the oil, a valve for opening the steam-passage leading to the atomizer,adevice for operating said valve, with steam and oil pipe connections for the parts, the small projeeting end of the combustion-tube being centrally sectioned to show the spray of oil entering the same; Fig. 2, an enlarged sectional view of the steam-valve and device for operating the same, drawn to show the interior construction of those parts. Fig. 3, Sheet 2,shows a portion at the base of a steam-generator,

drawn to ascale much larger than that to which Fig. 1 is drawn, showing a slight difference in the construction and arrangement of the steamvalve and the operator for the same, a portion of the oil-reservoir, and the oil-conduit and other parts, a portion of the shell of the steamgenerator being vertically sectioned and broken away toshow the pipe-connection, the steam-valve and operator for the same being vertically and centrally sectioned, as in Fig. 2, a detached portion of the steam-pipe with a stop-cock being also shown; and Fig. 4,Sheet 3, a modification in the manner of controlling the flow of oil to the atomizer, the stop-cock in this instance being placed in the oil-conduit, instead of the steam-pipe.

Referring to the parts, A is a steam-generator of common form; 13, a reservoir for the oil for fuel; 0, the tapering fire-tube; D, an atomizer; F, the oil-conduit, and G asteam-pipe leading to the atomizer.

The atomizer shown is substantially of common kind, located at a point upon the pipe joining the steam-generator and oil-reservoir. The part G of said pipe for the steam between the steam-space in the boiler and the atomizer is of small caliber, and the part F of the pipe first named for the oil communicates between the interior of the oil-reservoir and the atomizer.

H is a casing or body containing valveg for opening and closing the passage in the steampipe, and K a device for operating said valve from steam or water pressure, which valve and device for operating it, withtheir connections, are mainly the subject of my present invention. The valve gis equally well adapted to operate in the oil or the steam,.and maybe located on the pipe between the oil-reservoir and the atomizer,as well as upon the pipe between the latter and thesteamgenerator.

The valve which is used wholly to check or regulate the flow of steam or oil to the atomizer, as the case may be, is formed with a body, b, referring more particularly to Fig. 2, to which is connected a section of steam-pipe, d, leading from the boiler, and another section of pipe, f, leading to the atomizer, there being an opening, a, formed within said body to make the passage continuous between the pipes. A valve-seat, c, is formed in the body b, the opening a passing to and through said seat, and a valve, g, fitted to the seat,by means of which the passage in the pipe may be opened or closed by a longitudinal movement of said valve. The valve rests longitudinally within the body I), and extends out thereof through a stufiing-box, h, at the end of the body, a slight longitudinal motion of the Valve being sufficient to open or close the passage a, as the case may be.

K is a device, the interior of which opens into the steam-space of the boiler, adapted to be used to operate the stop or valve 9 for closing the passage a. This device K is formed of a barrel, 7c, and an inclosed plug or piston, l, the inner end of which rests upon a seat, 6, within the barrel. A stopper, t, is fitted to enter with a screw-thread the interior of the larger end of the barrel, between the inner end of which stopper and a collar, u,'of the piston a spiral spring, 8, is inserted, the tendency of which spring is to hold the piston firmly down upon its seat i. The pressure'exerted by the spring to urge the piston against its seat may be regulated by turning the stopper farther or less distant into the barrel. The pressure of steam against the inner end, 1', of the piston tends to overcome the force of the spring and lift the piston off the seat 1'. The outer end of the piston is formed with a longitudinal cavity, a, fitted to receive the outer end of the valve 9, the axes of the casings H and K forming a straight line. A spiral spring, 0, is inserted in the cavity it below the end of the stop 9, the tendency of which spring is to hold the stop or valve 9 moderately against its seat 0 and close the passage a. From this construction it will be understood that when the steam or water pressure against the end r of the piston Zis sufiicient to compress the spring 8 it will move said piston endwise sufficient to press the valve g against its seat and close the steam-passage a.

In Fig. 2 is shown a means by which the stop 9 may be adjusted to its seat 0. The stop is divided, one part being formed with a threaded socket, w, and the other part threaded to enter said socket, a jam-nut, 51;, serving to hold the parts rigidly together when properly adjusted. The adjustment is usually such that a pressure of steam of eight or ten pounds to the square inch will be necessary to force the step back and open apassage-way for the steam to the atomizer. After the valve or stop is once forced back the passage-way will remain open for all pressures of steam within the boiler until the same gets so high as to force the piston lagainst the action of the spring 8 toward the valve 9 and close the latter, as above stated. When the flow of steam is cut off, the oil ceases to be drawn from the reservoir and no fuel is carried into the firetube. As soon as the steam-pressure in the boiler falls sufliciently to permit the spring 8 to carry the piston back against its seat i the pressure upon the valve or stop 9 will again open the passage-way for steam to the atomizer, which will draw the oil thereto and again supply the fire-tube with atomized fuel, a constant flame being kept at a proper point in the fire-tube to reignite the atomized fuel after the flow of the same has for a time been out off. The spring 0, being inserted in the piston Z at the end of the valve I also serves the purpose of preventing said valve being too forcibly pressed against its seat from the pressure at '2', which otherwise might result in the injury of the parts in contact.

The valve or device shown at K in Fig. 2 is substantially a pop blow-off valve of common kind used upon steam-boilers, it serving the purpose in this case of a safety blow-off valve and also for an operator for the fuel-supply valve H.

It is sometimes convenient and desirable to operate the valve g from the pressure of water in the boiler by connecting the valve K with awate'r-leg of the boiler near the bottom of the latter. To do this I make a slight change in the form of the piston lot the valve (shown in Fig. 3) by inserting a disk,f, of packing material-such as india-rubber or similar substancewhich is compressed between alooselysliding washer, it, upon the pistonl and the collar 9' by means of the springs. Thewaterpressure at? tends to force the piston Zupward and drive the valve 9 against its seat, as above stated. A pipe, N, may be inserted between the valve K and water-leg of the boiler, communicating between the water therein and said valve. As a matter of precaution, a stopcock, O, is inserted in thepipe, by which to cut off the flow of water, should it be necessary at any time to remove the valve K or other parts for repairs.

The design of the valve y is to open or close the passage between the boiler and the atomizer,or between the latter and the oil-reservoir, for the purpose of controlling the delivery of fuel to the furnace.

Under some circumstances and on some accounts it is more desirable to connect the valve K with the lower part of the water-space within the boiler than to the steam-space, for at that part of the boiler-thc same being below the combustiontube-the water is comparatively quiet and acts more steadily upon the piston of the valve; besides, it being considerably below the boiling-point in temperature, it expands the parts of said valve to a less degree than if they were acted upon directly by steam or water near the surface. The expansion of the parts of the valve from highly-heated water or steam sometimes interferes with the perfect working of said parts.

Fig.4 shows a valve, 0, of common kind, preferably a valve formed with a tapering plug, located in the oil-supply pipe, by means of which the flow of oil to the atomizer may be cutoff or regulated, which valve may be used in lieu of the valve above described, the same being used in the oil-conduit or steampipc, as may be thought desirable. To operate this valve automatically, I place a valve,K, vertically in the upper part of the boiler, in position to have the outer end of the piston I bear upward against a lever, I), held to the boiler by a simple standard, 22. The lever is held so that its free end stands over the lever c of the valve 0 in the oil-conduit, being connected therewith by a rigid rod, d. The hole for the passage of the oil through the plug of the valve is formed with reference to the lever 0, so that when said lever occupies, for instance, the position shown in full lines, a passage for the oil will be opened through the pipe; but when said lever is raised to the position shown in dotted lines the oil-passage will be closed.

Too high a pressure of steam in the boiler will raise the lever b to the position shown by dotted lines, which will act to cut off the flow of oil to the atomizer by closing the passagev and thus stop the supply of fuel to the furnace. In this case the flow of steam through the v A 364,709 a 3 atomizer into the combustion-tube continues, but no bad results follow, for the waste of steam through the same orifice in the atomizer is of little account, as it occurs when the steam is at a high pressure and there is a surplus in the boiler. Besides, the fiow of a jet of steam in onto the heating-surfaces of the boiler tends to remove incrustations of soot or other matter adhering to said surfaces resulting from combustion. This device will work equally well to regulate the flow of liquid fuel, whether the same be atomizedor no Yielding diaphragms acting under pressure have heretofore been used as means in controlling the flow of fluids through pipes. I am aware of this fact, and in this application for a patent do not show nor describe 'nor make any claim for a diaphragm. This part cannot be made very strong or durable, and any injury to it disables the regulating-valve. In my construction the part directly acted on by the steam is a solid piston. Again, I employ two springs, one of which holds the piston to its seat and thus prevents the valve from being actuated by less than a predetermined al'nount of pressure, which is adjustable by screwing the casing in or out, while the other spring prevents the valve from being pressed too tightly into its seat. The previ ous constructions above referred to use either no spring at all or only a replacing spring or weight, which of course cannot do the work of my two springs. These are of different degrees of resistance, and the effect of the steam on the valve is graduated accordingly.

\Vhat I claim as my invention is- 1. In combination with a steam-generator and an oil-supply pipe, a spring-pressed piston having its inner end exposed to the pressure of the steam, a valve longitudinally movable in the outer .end of said piston, a spring which forces said valve outwardly, and a pipe which is closed by said valve in order that the steam-pressure may govern thesupply of steam or oil, substantially as set forth.

2. In combination with the oil-supply and steam-generator A, the chamber K and piston Z, having one end accessible to the steam and the other recessed, as shown, a spring, 8, bearing against said pisto11,'a valve, g, having its stem longitudinally movable within the recessed end of said piston, and the passage a and seat 0, arranged to receive said valve for closing said passage, substantially as set forth.

3. In a device for regulating the flow of fluids through pipes, in combination with a steam-generator and pipes for said fluid, a valve-body formed with a valve-seat and provided with a valve for said seat, abarrel conimunicating with the interior of said steamgenerator containing a movable piston formed with a cavity at its outer end in which to re- I ceive the outer end of said valve, and a spring placed within said cavity to bear against said valve, substantially as and for the purpose set forth.

4. In a device for regulating the flow of fluids through pipes, in combination with a steam-generator and pipes for conducting said fluids, a valve-body formed with a valve-seat and provided with a valve proper for said seat, and a barrel or inclosure connected with the interior of said steam-generator, containing a movable piston formed with a cavity at its outer end in which the end. of said valve rests, and a spring placed within said cavity and adj usted for said valve, substantially as and for the purpose set forth.

5. In combination with the steam-generator A- and valvebody K, having valve-seat i, the piston or valve Z, recessed at one end and fitting at the other against said seat, the spring s, bearing against said valve, the additional valve 9, longitudinally movable with respect to said piston, and the valve-body H, having passage a, connecting the pipes 01 f, substantially as set forth.

GEO. W. DAVISON.

Y Witness es:

E. B. WHITMORE, H. KNIGHT.

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