US330964A - John desmond - Google Patents

Description

Darren diaree Farrar 'Ottica JOHN DFSMOND, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO I/VILLIAM R. GERHARD, OF SAME PLACE.

|NJECTOR.

l SPECIFICATION forming part of Letters Patent No. 330,964, dated November 24, 1885.

Application filed February 6,1885. Serial No. 155,083.

y useful Improvements in Injectors; 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 pertains to make and use the same.

My invention relates to improvements in,

injectors for steam-boilers, the object being to provide check -valves for the hotV Yand cold water overflow, that open outward and operate automatically, being opened at first by the pressure of steam from within, and are afterward closed by atmospheric pressure from without, to the end that with the exception of the stop-valve in the steam-pipe the injector in all its parts is made automatic.V

My invention also consists in the details of construction hereinafter described.

In the accompanying drawings, Figure 1 is a side elevation, in section, of my improved injector. Fig. 2 is a plan view of the plug F and cross-barf.

A represents the body ofthe injector, that in crosssection is rectangular withronnded edges. At the ends are respectively the nozzles B and C. To the former is attached a steam-pipe, B, leading from the boiler and provided with a stop-valve. To the latter is attached the feed-water pipe C', leading` to the boiler and provided in the usual manner with a check-valve. By the side of the nozzle Bis an opening secured by the plug B2, by remov ing which access is had internally to this part of the injector. On top is the nozzle D, secured by the plug D. This nozzle has lateral openings d, known as Coldwater relief or overiiow.7 Below is the nozzle E, to which is secured the suction or cold-water pipe E', and an opening secured by the hollow plug F, the opening through the plug forming the hotwater relief or overflow j'. Internally are the longitudinal central walls, G and H, that join, respectively, the transverse diaphragme G and H and divide the injector in the main into the ve chambers I, I', I2, I3, and I4, and the diaphragm g, extending from the wall G to the outer wall of the injector, and between the diaphragm G', and has a bore, 7c, somewhat (Model.)

this diaphragm and the plug B2 is the small chamber t', and by means of an opening, i', throughV the wall G this chamber is in open relation .with the chamber I. Through the wall H is an opening closed by the checkvalve F', opening outward, the stem of which passes through a small cross-bar, f', attached to the plug F, and formsa guidei'or the valve. This valve is balanced by the coil-spring f 2. From the inside of the nozzle D an opening 6o leads into the chamber I2, and is closed by the check-Valve d', opening outward, and thestem,

of the valve operates in the bore of the plug D, that serves as a guide for the valve. A plug, J, screws -into an opening'in the dia- 65 phragm g, and has a small bore, j, the end of the bore terminating in the chamber i being slightly Haring and funnel-shaped. In line with the plug Jis the plug K, that screws into 7o larger than the orifice j. The adjacent ends of the plugs .Tand K are separated a short distance, and the intervening space is about midway over the pipe E". A hollow plug, L,

is screwed into the diaphragm G between the chambers I and I2, Vtheend of the orifice presenting toward the chamber I being slightly flaring. In line with the plug L, and separated from it but a short distance, is a plug, M, screwed into an opening in the diaphragm H. The bore of this plug is larger than the bore in the plug L,and is funnel-shaped at the end next the plug L.

N is a tube, with a bore of the same diameter as the cylindrical part of the bore in the plug M. This tube and plug almost come in contact, being separated perhaps one-hundredth part of an inch, more or less. The outer end of the tube nts i'n the nozzle C, and has a shoulder, n, that abuts against a corre spending shoulder in the nozzle, and is held in place from the outside by the coupling of the feed-pipe that abuts against the end ot' the tube.

In starting the injector by means of the valve in the steam-pipe a small quantity of steam is first admitted, and is received first into the chamber I, and from thence a portion of the steam passes direct through the plug L to the chamber I2, and the balance roo of the steam passes through the orifice i and' through the plugs J and K to the chamber I2. Some of the steam also passes through plug M and tube N and into the feed-pipe as iar as the check-valve therein, and a small portion of the steam finds its way through the slight opening between the plug and tube into the chamber I3. The admission of steam expels the air from the injector, forcing it out rst by opening the more accessible valve d, and afterward, as the pressure increases, by opening the valve F. rIhe expulsion of the air produces a partial vacuum in the injector, which, togethcr'with the action 'ofthesteam in passing from the plug J to the plug K across the mouth of the suction-pipe E', raises the water,which is-carried by the current of steam through the plug K into the chamber I". The momentum of the water, and urged along perhaps more'or less by thev current of steam,l

Y carriesitth rough'the valve-d and out.through the overflow-openings d, and more or less conden-'ed hotV water finds its way through the opening betweenthe tube and plug intothe chamber J3, Vand'is dischargedthrough thevalve F. The introduction of thewater causes a condensation' of steam that.' produces apartial vacuum that results in the closing of the valves dand F by! atmospheric pressure from without, the valve d,beingy in the immediate vicinity of where the greater' part' of thelcondensatio'n' takes place, closing lfirst. The steam continuing' to lo'w' through' the steam-pi pe as the pressure! increases, a current yof vsteanlisy established through the plugs and tubes L, M,-

and "N, that'draws'the'water inwith it and forces'it 'along'- the'eed-pipe to the boiler.

In operating 'this 'injector therey is but the one Valve to manipulate, (the valve inthe steam-pipa) all* the other'parts operating lau-- tornatically.

No skinv is required. nnforu'inary'workman can learn itn'afew minutes -to operate this Theinjector wilt-start lpromptly and with certainty, and will continue to act as long as the supply of steam and water is furnished.

I am aware that a double injector is not new, and also that it is old to provide an injector with two automatically operating reliefvalves; hence I make no claim, broadly, to

-ond passage-way parallel and in open relation at either end with the first passage-way, re-

lief-valves. opening outward and connected K with the first passage-way, and a suction-pipe connected with and at right angles to thev second passage-way, with the ports arranged substantially as described.

2. In an injectorfor steam-boilers, the com bination, with a direct `passage-way through the injectorg'vfrom'thesteampipe to the feed- --pipe thereof, a second passage-way leading across the mouth of the suction-pipe parallel andl in open relation withtheurst passageway, eachpassage-wayprovided with a succession vof` hollow plugs with spaces between,

arranged substantially as indicated, ofcoldv and hot water reliefs `or overflows, each pro- `videdwith a valve opening outward, the for- 'mer arranged above, lso t'hatwater will escapel therefrom-by, pressure from within, and

`vthe latter arranged below,1so that water' will y-escape therefrom -by-gravity, substantially as shown. v

In testimony whereof I sign this'specifcation, inthepresence `of two witnesses, this 30th daybfiJanuary, 1885.

JOHN DESM'OND.

/'Yitnesses:l l

HENRY GCRowELL, GSW. SHUMWAY.

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