US276898A - Injector - Google Patents

Description

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v2 Sheets-fSheet 1.

L SCHUTTB.

anyl 1,1883

Patented M N4 PETERS. PhalLilhugrnpmr. Washinglen. D. C.

.'(Model.) 2 sheets-'sheet 2.

fL. SGHUTTB.

` INJBGTOR. l, y No. 276,898. Patented May 1,1883.

8 l G l [Imam/5f f UNITED STATES PATENTN OFFICE.

LoUIs scHurTE, on PHILADELPHIA, PENNSYLVANIA.

INJECTOR.

SPECIFICATION forming ,part of Letters Patent No. 276,898, daf-.ea May 1, 1883.

Application filed February ll, 1883. (Model.)

To all whom it may concern:

Be it known that I, LOUIS SGHU'ITE, of Philadelphia,in the county ofPhiladel pha and State of Pennsylvania, have invented certain Improvements in Steam-Jet Injectors, &c., of which the following is aspeci'tication.

My present invention relates to starting and relief valves on injectors and other steam-jet apparatus for the forcing ot' liquids and tlnids,

and more particularly those that may be `sub jected to sudden counter-pressures exceeding the nominal counter-pressure which they have been constructed to overcome.

The accompanying drawingsillustrate an injector or stealnjet apparatus of simple form having my improvements embodied therein.

Figure l is a longitudinal section ofthe apparatus and valve attached. Fig. 2 represents a cross-section on thecenter-line x .fr of the valve, showing the valve-seat, discharge, and overflow passage. I"ig.3 shows an elevation, partly in section, ot' the apparatus in a modifled form. With reference to Figs. 1 and 2, I will explain its action.

The principal parts ot' the apparatus are the steam-nozzle A, combining-tube B, delivery# tube C, steam-inlet I), Water-inlet E, and discharge F, all 'of substantially the usual form and arrangement.

Gr is the starting and relief valve, which, with its connections, forms the subject of the present invention. 'lhe valve G, opening from the discharge F ot' the instrument outward, carries on its outer end a piston, H, working in a cylinder, and beyond this a stem, I, with a washer and nut, against which a spring, K, acts upward, so that if no other influence is brought to bear on the valve the action ot' this spring will cause it to be kept open. If, however, suicient pressure is applied on top of the piston H, the valve will close against the pressure from the discharge-pipe F, exerted against the under side ot' the valve Gr. The spac'e above the valve and below the piston communicates with the waste or overiiow passage L. By applying ontop of piston H the same steam-pressure as that under which the injector or steam-jet apparatus is operated, and by properly proportioning the area of the piston H and the valve Gr, the valve can be made to open as soon as the pressure in the discharge end ot' the instrument exceeds that bearing a lixed relation to the steam-pressure, and will remain closed or will close whenever it is lower than would be admissible as determined by the relation ot' areas and pressures.

Among cases where such an instrument will find useful application is thatot -feedinga nest ot` boilers where the admission to each boiler can be regulated or closed separately, where it may occur that thejdischarge from the instru` ment may temporarily be greatly contracted or entirely closed, in which case the counter; pressure in the discharge will rise till it opens the discharge-valve, and the instrument will continue to work, discharging through the passage L. Another case is that where the instrument is used as a ireengine, where a bend or obstruction in the hose or a closing of the discharge-nozzle may cause all excessive pressure, in which case the relief-valve will open and allow of a continuous working ot' r the apparatus.

as shown in the accompanying drawings. Re,

ferring to these connections, asshownin Fig-1, M is a passage from the steam-supply, opening into a small steam-chamber, N, containing a slidevalve, O. P is a passage leading from beneath the slide-valve to the waste or overtlow L. rEhe slidevalve has its rod or stem connected to the operatingstem of the ma'in Steamadmission valve.

In the position ofthe parts shown in the IOC l paratus, will be readily understood.

The slide-valve 0 is made sufficiently long or the connection vbetvveen it and the operatingstem of main valve has sufficient lost motion to admit ot the main valve being'opened sufficiently to bring the apparatus into action before a change in the communication from above the piston with the waste-passage is eiected, while a further movement cuts off this communication and opens the passage P through M with the steam-chamber, thereby placing a pressure on the piston and closing the valve G. In this way it will be seen that a ready starting ot the instrument can be effected through the valve G at all times, while it acts at the same time as a relief-valve inthe event of the pressure ot' the discharge becoming higher in proportion to the governing steampressure than that limited by the proportionate areas of valve and piston.

Fig. 3, showing a modified form of the ap- It has the leading parts for the same purpose as explained with regard to Fig.A 1. In this case the valve G isplaced below and connected with the piston H by means of a lever, 1t. The object ot' this moditication is to reduce the area ofthe steam-piston H, which controls the opening and closing of the valve. The admission I of steam on this piston is in this case effected by a three-way cock or valve, O, Which, Whenv closed against the steam, communicates with the atmosphere, thereby relieving thepressure 'rom under the piston. This starting and relief valve may be advantageously applied to any form of steam-jet apparatus or injector, be it double tube, self-adjusting, or any other. A diaphragm may be substituted for the piston H. The valve may also be separate from the body of the injector, and simply connected thereto by pipes or other suitable means.

The present invention is restricted to those matters and things which are hereinafter claimed, and as to all matters which may be described or shown, but which are not claimed, the right is reserved to make the same the subject of a separate application.

Having thus described myinvention, what I claim is 1. In a jetapparatus for the forcing of liquids or iiuids, an overowyalve, substantially as described, arranged to be acted upon on one side by the pressure of the discharge and on the other side by the pressure of the steam or fluid by which the apparatus is operated, whereby an excessive counter-pressure or resistance causes the automatic opening of the overflow-valve.

2. In a steamjet apparatus, substantially such as shown, an overiioW-valve communicating with the discharge end and subject to the pressure of the outgoing fluid, combined with a closing-piston having an area greater than that of the valve, and a conductor or passage whereby the pressure ot the steam or actuating-duid is applied to hold the overtlow 'normally in a closed position.

3. In a steam-jetapparatusfor moving fluids, a main valve for admitting the-actuating-steam to the apparatus, an overiiovv and starting valve at the delivery end, a piston to close the overflow-valve, and a valve connected and arranged to admit steam behind the piston after the opening of the main valve, substantially as described, whereby the overflow-valve is relieved from the closing-pressure and permitted to remain open until alter the apparatus has been set in action.

4. In a jet apparatus for moving Huids, the combination of the overflow-valve, the piston to close the same, the passages P Q, and the valve O, acting in connection With said passages and with the steam-supply.

5. In a steam-jet apparatus, an overflow relief-valve constructed and arranged, substantially as described, to receivel upon its outer side aiiuid-pressure .in excess of the normal pressure of the fluid discharged by the apparatus.

6. In a jet apparatus of the character'hereiu represented, the combination ot the valve Gr, -9

Witnesses:

JOHN D. YANON. J AMES E. CLARK.

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