US480921A - Injector - Google Patents

Description

( Model.)

R. HARRISON.

INJECTOILV No. 48 O,921. Patentd Aug. 16, 1892.

WILQEEEEE lnvEnLmP i fi j f Harra's n UNITED. STATES -ATENT FFICE.

ROBERT HARRISON, OF ERIE, PENNSYLVANIA INJECTOR.

SPECIFICATION formng part of Letters Patent No. 480921, dated August 16, 1892.

Application filed November 10, 1391. Serial No. 4ll,526. (Model) .To all whom it may 00771067 7@.-

Be it known that I, ROBERT HARRISON, a citizen of Canada, residing at Erie, in the connty of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Injeetors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention consists in the improvements in injectors hereinafter set forth and explained, and illustrated in the acconpanying drawings, in which- Figure lis a side elevation ot my improved injector. Fig. 2 is a longitudinal central section of the same.

The Construction of my inproved injector (shown in the drawings) embodies both Water lifting or ejector nechanisn and injector mechanisn placed side by side in a shell or body A, having passages therein connecting the ejector and injector mechanisn together, B being the stean-passage, C a water-passage from the ejector mechanism D D' to the injector mechanism E E', and F a passage from the injector E E' to the overflow-valve chamber G. The ejector-tube mechanism D .D' and the injector-tube nechanisn E E' are of usual and ordinary Construction.

Above the stean-jet tube D of the ejector I make a valve-chanber H, to which stean is supplied through a passage I. In this chamber H there is a combined piston and disk valve h d, from which a valve-stem co extends out through a stuffing-box Jto the end of an Operating-lever K, to which it is pivoted, this lever K being fulcruned upon a standard L, pivoted to the body A. The pistonportion h ot' this Valve fits into the chamber c in the Valve-seat M, so as to close the lateral steanpassage b, connunicating with the steanpassage B leading to the stean-jet tube E of the injector, and the disk portion d of this Valve fits down upon the face of the Valveseat M, so as to close the passages e (only one of which is shown) through the Valveseat M, leading to the steam-jet tube D ot' the ej ector, so that when the disk portion d of the Valve h d is first raised off of its seat steam is admitted to the ejector only; but when it is raised far enough to withdraw the pisten porton h thereof out of the chanber c then the steam is also admitted to the injector. The valve-chamber G, into which the overflowpassage F leads, is also provided with a conibined piston and disk overflow-valve f g, having a stern N passing out through a stuffingbOX O, and is pivoted to a connecting-bar P, which extends to and is pivoted to the end of the Valve-stem a, so that the steam-valve h d and the overfiow-valve f g are adapted to be moved simultaneously by means of the lever K, as hereinafter set forth. The piston portion f of the overflow-valve fits into and closes the overfioW-passage 75 through the valve-seat R. when the steam-Valve h d is open, as illustrated in Fig. 2; but When the stean-Valve is closed or only open a sufficient distance to supply steam to the ejector D D' then the pisten portion f of the oVerflow-valve f g is entirely withdrawn from the overflow-passage k, so that the overflow from the ejector passes through it and over the top of the valve-seab R and down through the annular passage n. around the Valve-seat R to the overfiow-discharge passage m; but when the steam-valve h d is raised far enough to commence to ad- 'nit stean to the injector E E' the piston f enters and closes the overfioW-passage Ic and forces the water discharged from the ejector to flow through the passage C to the mouth of the injector-tube E'. Meanwhile the disk portion g of the overfloW-valve f g is still sut-- ficiently above the face of the valve-seat R to allow the overflow from the injector passing through the passage F into the valve-chanber G to pass down around the periphery of the disk g and down through the annular-passage n in the Valve-seat R and out through the oVerfloW-outlet m,this continuing untilthe steam-Valve h d is f ully open, which operation closes the disk g ol' the overiow-valve down tightly upon the face of the Valve-seat R, entirely closing the overflow and forcing the Water discharged froni the injector to pass on to the boiler. When, however, the stean-valve h d is closed, the operation of closing it simultaneously opens the overflow-valve f g, so as to open both the overfiow-passage 79 from the ejector and the oVerflow-passage fron the injector, so as to oompietely drain the waterout of both the ejector and injector.

Having thus fully described my invention, so as to enable others to eonstruct and operate the same, what I claim as new, and desire to secure by Letters Patent of the United States, 15-

1. The combination, in an injector, of acombined piston and disk steam-inlet valve with a. combined piston and disk overflow-valve, a. bar connecting said two valves together, so that they will move in unison, and a. lever pivoted thereto for Operating said valves, substantially as and for the purpose set forth.

2. The combination, in a combined ejector and njector, of a combined piston and disk ROBERT HARRISON. witnesses:

J. C. STURGEON, WM. P. HAYES.

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