US571718A - Steam-injector - Google Patents

Description

(Mods a1.) 2 Sheets-Sheet 1.

P. BROWNLEY.

STEAM INJECTOR.

No. 571,718. Patented Nov. 17,-1896.

ATTORIIEY.

(MMQL 2 Shets-Sheet 2.

P. BROWNLEY.

STEAM INJECTOR N0. 571,718. Patented Nov. 17, 1896.

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UNITED STATES PATENT tries.

PATRICK BROWNLEY, OF NElV YORK, N. Y.,' ASSIGNOR TO THE BROWNLEY MANUFACTURING COMPANY, OF NEV JERSEY.

STEAM -lNJ ECTO R.

SPECIFICATION forming part of Letters Patent N0. 571,718, dated November 17, 1896.

Application filed April 17,1896. Serial No. 587,928. (Modeh) To ctZZ whom it may concern: and lifter to pass direct to the atmosphere a Be it known that I, PATRICK BROWNLEY, of vacuum is instantly created and both sets of New York, in the county of New York and tubes serve to raise the water into the in- State of New York, have invented certain new jector. Thus a maximum boiler supply can 5 and useful Improvements in Steam-Injectors; be constantly maintained.

and I do hereby declare the following to be a The invention will be hereinafter fully set full, clear, and exact description of the invcnforth, and particularly pointed out in the tion, such as will enable others skilled in the claims. art to which it appertains to make and use Figure l is a view in side elevation of my an the same. improved injector. Fig. 2 is a vertical lon- This invention contemplates certain new gitudinal sectional view thereof. Fig. 3 is a and useful improvements in steam-injectors, detail sectional View showing the position having special reference to that class known occupied by the cock after water is lifted as litters and forcers. into the injector. Fig. 4c is a similar view The object is to increase the starting and showing the position of said rock when the working capacity of a double-tube injector. injector is working. This I accomplish by doubling the lifting Referring to the drawings, A designates power of the injector by making the set of the casting or casing; a, the steam-inlet; a, tubes constituting the forcer serve equally the water-inlet; a the overflowopcning, and 20 with the other or lifter set of tubes in raisa the delivery-outlet leading to the boiler.

ing water into the injector. Steam is supl3 designates the forcer and G the lifter. plied simultaneously to both sets of tubes, Of the former, b is the steam-tube, l) the whereby the injector can be started and maincombining-tube, and If the deli 'ery-tube, the tained at a very low pressure, at a maximum two latter tubes being integral. Said deliv- 7 5 25 degree of high pressure, or at any intermecry-tube is secured in a tapering or conical diatc pressure. These results are obtainable wall or partition I)", which divides the waterbecause the only pressure to be overcome in chamber b from the delivery-chamber b of startingthe inj ectoris that of the atmosphere, the forcer, said latter chamber being in line since no check-valve for the primary overwith the delivery-outlet o By thus extend- 8o 30 flow is employed. In lieu I use a cock subing the combining-tube out in the waterstantially of the character shown and dechamber and elongating the same the water scribed inLetters PatentNo. 513,378, granted in said chamber will insure better condensato me January 23, 189st, said cock having tion in starting and the same will be heated ports which, in starting the injector, open up by said tube when the injector is working, direct communication between the deliverythus preventing too great condensation upon chamber of the litter and forccr with the the water intermingling with the steam. Of overflow-opening, and when the column of the lifter, cl is the steam-tube, d the combinsteam and Water is established will instantly ing-tube, and (Z the delivery-tube, said latter cut off the overflow of the lifter and gradutubes being integral and secured in partition 0 o ally out cit that of the forcer, at the same (i separating the water-chamber (I from the time opening up direct communication be discharge-chamber (2- The latter chamber tween the latter and the outlet to the boiler. opens direct into the water-chamber b of the lIeret-ofore in injectors of this class steam forcer. The steam-tubes b and d are mount could not be admitted through the foreer in ed in a wall or partition D of a steam-cham- 5 5 starting the injector, as it would tend to her E, into which the steam-inlet CL opens, create back pressure on the first or primary said steam-chamber being common to both of overflow-valve, or at least form an equilibsaid steam-tubes, so that steam is supplied riuni, preventing the starting of the injector, simultaneously to both sets of tubes, no valve and have the effect of forcing the steam back being employed for cutting off the supply of loo 0 into the suction-pipe; but by allowing the steam to the foreer in starting the injector. initial flow of steam through both the forcer The outlet for the overflow from the lifter is through a passageway e, surrounding the delivery-chamber U, and substantially diametrically opposite the outlet end of this passageway is the inner channel e of the overflow-openin g (0 Hence, if extended, the passageway c and overflowchannel 6 would intercept the delivery-chamber b and boileroutlet a F is a cock located transversely of the machine, so as to intercept the delivery-chamber If, the outlet a, the overflow passageway 6 of the lifter, and the channel of the overflow-openin g. To one end of this cock is connected an operating-handle f, by which it can be easily and quickly turned, the movement of said handle being limited bya finger f and stops f This cock is constructed, in the main, as shown and described in the before-mentioned patent. It is provided with a wide transverse opening f and opposite cut-aways f and f forming overflow-ports for the delivery-chamber of the forcer. In starting the injector the wide opening of the cock assumes the position shown in Fig. 2, thus establishing direct communication between the passage-way e and the overflowopening a the side f of said cock closing the delivery-outlet a leading to the boiler. Hence the use of a check-valve to prevent back pressure from the boiler interfering with the injector is rendered unnecessary. When the cock is in this position, the port formed by the cut-away f establishes communication between the delivery-chamber b of the forcer and the overflow-opening a As soon, however, as the water has been lifted and the column of steam and water is being establishedthe operator turns the cock F, causing the side f thereof to entirely out off the overflow of the lifter through the passageway 6. (See Fig. 3.) As this is being done any further overflow from the forcer is allowed to pass through the port formed by the cut-away f to the overflow-opening a the further movement of the cock cutting off or closing this overflow and establishing direct comm unication between the delivery-chamber of the forcer and the outlet to the boiler. (See Fig. l.)

The operation is as follows: The cock being positioned as shown in Fig. 2, closing the outlet to the boiler and opening up communication between the passage-way e and overflowopening a ,steam admitted to the steam-chamber E will pass simultaneously through both sets of tubes and out to the overflow. Upon overcoming the atmospheric pressure and reaching the overflow-opening a vacuum is instantly created, not onlyin the water-chamber of the lifter, but also in the chamber of the forcer or body of the casing, causing the immediate lifting of water, which, passing through the combining and delivery tubes of the lifter, will pass from the discharge-chamber of the latter through the passage-Way c and opening f of cock F to the overflow-opening a and the overflow of the forcer passes to said opening a through the cut away f". As soon as the column is established, or about to be, the cock is turned, cutting off immediately the overflow of the lifter and gradu ally that of the forcer, (see Fig. 3,) and the now established column of steam and water will pass through the opening in the cock on to the boiler, said cock being turned to the position shown in Fig. 4.

The advantages of my invention are apparent to those skilled in the art. No check valve for the overflow of the lifter being employed and only the atmospheric pressure having to be overcome, and steam being admitted simultaneously to both sets of tubes, the forcer also acts as a litter, thus doubling the capacity of the apparatus. The injector can be started at a low pressure and can be continuously operated at such a pressure or at a very high pressure of steam, or at any intermediate pressure. There is a decided acb vantage in the employment of a cock for controlling the operation of the injector, since the cock being of substantially conical or cylindrical form and extended transversely through the injector at right angles, so to speak, to the line of travel of the steam and water there is but little, if any, pressure to be overcome in turning said cock. It will also be noted that the overflow of the forcer is only gradually cut 0d, thus allowing any additional overflow from the latter, after the closing of the overflow of the lifter, to pass to the opening a An injector constructed as herein described is extremely simple and inexpensive and, be in g composed of but few parts, is not liable to readily get out of order. The single cock employed for controlling the working of the injector being positive in its action is not affected by any clogging of foreign or gritty substances, as frequently occurs with looselymounted valves.

I claim as my invention- 1. A double-tube injector having direct communications for the forcer and lifter with the overflow-opening, means for positively closing the boiler-passage in starting the injector and a single steam-chamber common to both said lifter and forcer whereby steam is supplied simultaneously thereto in starting the injector, as set forth.

2. A double-tube injector having separate overflows for the lifter and forcer, a cock for quickly closing the overflow of the lifter and gradually closing that of the forcer and a steam-chamber for supplying steam simultaneously to both the lifter and forcer in starting the injector, whereby the forcer will also act as a lifter, as stated.

3. A steam-injector of the character herein specified having overflow-passages for the litter and forcer and a cock intercepting said overflows having three ports, one of said ports allowing of the gradual closing of the overfiow of the fol-oer after the overflow of the lifter is closed, as stated.

4. A steam-injector of the character herein specified having overflow-passages for the lifter and foroer, and a cook having a main opening or port extending transversely there- 'throngh, and two smaller ports for the overflow from the forcer, as set forth.

5. A steam-injeotor of the character herein specified having overflow-passages for the lifter and foroer, and a cock having a main opening or port extending transversely therethrongh, and two opposite out-aways forming ports for the overflow from the foreer, as set forth.

6. The herein described steam -injector having two sets of tubes forming a foreer and ing witnesses.

PATRICK BROWNLEY. lVitnesses:

LoUIs O. VAN DOREN, WILLIAM S. SMITH.

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