US475201A - church - Google Patents

Description

(Model.) 2 sheetssheet 1. C. E. CHURCH. INJEGTOR.

' UNrrnD STATES CHARLES E. CHURCH, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE .HANCOCK INSPIRATOR COMPANY, OE SAME PLACE.

lNJEoToR.

SPECIFICATION forming part of Letters Patent No. 475,201, dated May'l'?, 1892. Application filed April 22, 1890. Serial-No. 348,982. (Model.) v

To @ZZ whom/.it may concern: f

Be it known that I, .CHARLES E. CHURCH, of Boston, in the county of Suffolk, and in the State of Massachusetts, have invented certain new and useful Improvements in Injectors; and I do hereby declare that the following is a full, clear, and'exact description thereof, reference being had to the accompanying drawings, in which- Figure l represents a vertical longitudinal section through the center of my improved apparatus; Fig. 2, a similar section of a modi- Iied construction, and Fig. 3 a horizontal section through dotted lines x @cof Fig. 2.

Letters of like name and kind refer to like parts in each of the 'figures My invention relates, primarily, to the class of injectors known as single-jet forcing-injectors, and also to those injectors in which a lifting-jet apparatus and a forcing-jet apparatus are combined and known as doublejet injeotorsf but it relates more particularly to the well-known Hancock inspirator-an injector of the latter kind.

It has for its object to increase the amount of uid delivered and to enable such injector to operate more efficiently over a wider range of steampressure, especially on long lifts, and also when the supply-water or other (luid is of a higherv temperature.- than has been heretofore practicable.

To this end my improvement consists, when applied to a single-jet forcing-injector, in the construction and arrangement of a supplemental inlet to the combining and delivery tube of the apparatus formed by one or more ports communicating with the interior of said tube through one or more openings therein (preferably at or near its throat) and with the water-supply chamber, with a valve adapted to permit a flow ot' fluid from the said chamber through the said inlet to the interior of the tube when the pressure within said tube at the point therein where the inlet communicates therewith is about equal to or is less than the pressure in the water-chamber, and which valve will close automatically when the pressure within the tube at the `said point therein is about equal to or is greater than the pressure in the water-supply chamber,

gthereby preventing reflux of the fluid from the tube through the inlet into the said charnber.

adapted'and 'arranged to deliver water or* other fluid continuouslyA to `the said forcer; second, in combining with the said forcer a lifter, the combining and delivery tube of which lifter is provided at its mouth with the usual inlet from the suction-chamber and is v provided, also, with a supplemental inletl formed by one or more ports ,communicat- `ing with the interior of the tube through :one or more openings and with the suctionchamber, with a valve adapted to close the `said supplementalv inlet when the pressure within this tube is about equal to orA greater than the pressure in the suction -chamben such lifter being suitably adapted-and arranged to deliver water or other uid continuously to the said forcer; third, in combining with an ordinary forcer the above-described lifter having a supplemental inlet land valve to control the same, said lifter being adapted and arranged to deliver water ATENT Oritron;Y 4

or other fluid continuously tothe water-sup.

ply chamber of said forcer, and, fourth, in combining with the forcer, having a supplemental inlet, as described, and either with or without a valve to vcontrol the same a lifter `also having a supplemental inlet, as described, fand either with or without a val-ve to control this inlet, such lifter being adapted and arranged to deliver water or other duid continul ousl y lto such. forcer.

In thedrawings, the casing of theappara- The pi per?` forrthg tus is designated by A B. Y ad mission ofthe actuating-steam is to 4be connected with the chamber S, the pipe'conmuni-t' eating with. the well or reservoir is to be *connected to the suction-chamber C, and the pipe i' for delivery or discharge of water to the boiler ris to'be connected at I).

In Fig. 1, E is the steam-jet tube of the lifting apparatus seated inthe partition P. F F is its combining and delivery tube made in two portions, the upper portion F,inclosed in IOO the suction-chamber C, being seated in the partitionT, andthe lower portion, inclosed in the intermediate .or forcer supply chamber J, being seated in the partition '1"'. Between these two partitions is formed a chamber G', connected With the water-chamber through theconduitf and' 'aperture g, forminga sup`' plementary inlettothe interior ol" this tube,

whichq'nlet is controlled by the valve G, seated in the aperture g and guided by means of itsstem, which fits loosely in the bonnet hf screwed into the casing A. The water-chamber C extends around that portion ofthe interior casing which incloses the 'conduit f vand chamber G', so that water f rom'the'wellmay rise around the upper portion of the tube F t enterv the-mouth'thereof, and,asfis clearly substantially las does'thevalve G of thelit't-A shown; may '-also enter the interior of the ytube F F through the conduitfand chamber G' W'h'enthe'valveG is open. This lifting apparatus,"-though slightl-ylmoditied 'in `its construction,r` is substan tiallythe-same inprinci'- ple as that described (and shownby Figy ofI the drawingsfthereo'f) infLetters Patent of the UnitedStates No. 405,992, dated J une 25, 1889,

whichwere granted to me -for improvements in ejector's, in which patent some of its advantagesare more clearlygrset forth.

K'is `the-steam-jet tube ofthe forcing vapparat-us, and LL' is its combining and delivery tube, made in'two portions and seated in partitions which form a chamber M and conduitv mwhich' connect with the intermediate or` for'cer'supply-chamber J through aperture m', forming a supplementaryinlet to theinterior Ioiithis combininganddelivery; tube, which inlet is controlled byv` the valve My operating ingfap'paratus.'v The vintermediattla or forcer supplychamber J surrounds that portion* of theinteriorcasing-which incloses the chamber -M and the tube-Land when theinjector is inroperation conducts thewater delivered by the lifter upto the-mouth of the combining-.tube L of the forcer and also through ap.-

'erture "m, conduit n, and chamberM' to the interiorlof the tube L L' when'the'valve M is open.Y The chamber Jcommunicates, also,

with the delivery-pipe D through an aperture controlled by the valve Q, and an ordinary V being closed andthe intermediate'overowvalve Q andthe final overflow-valverbeing open,-s'team is 'admined-'through' thepipe S and will iiow through the liftersteam-jet tube `E,ithe lifter combiningand delivery tube 'F F', the intermediate chamber J, and thence through theforcer combiningv and delivery tube-'L' L', and also through the outlet con'- trolled by the valve Q into the delivery-pipe the well or reservoir in the pipe andl chamy vber() and willV pass up around the exterior of'thetube F F' and enter the latter at its mouth, where, being acted upon by thesteam issuing from the jet-tube E, its velocity will be accelerated, and the Water drawn from the .well or reservoir will follow the course heretofore taken by theI steam. The valve Q should then be closed. All the water delivered from thelifter will then pass through the forcer combining and delivery tube L L' to the final overiiow. The valve yV should then beopen to admit steam tothe forcer steam-jet tube K, which in 4issuing from'that tube will'impartsuch velocityto the stream of water in the tube L' L'f that after closing the final overflow-valve the lWater will entery the boiler from which the actuating-steam is taken.

Both in starting the instrument and after it isin'full operation, whenever the pressure inthe combining and 'deliverytube-F F' at` G, and through the conduit f, and will enter' thecombining and delivery tube F F' at the Y'supplemental inlet G', andw-heneverfthel pressure .within the tube'F F' at the point vwherethe supplemental inlet G'. communi.

cates therewith is about equal to or is greater- 'than the pressure inthe water-chamber C the valve G will beautomatically closed and TOO `rios will prevent fa reiuxof the water from -the "ever the pressure in the tube L L' at the supplemental inlet is about equal to or is in ex- I'IO cess of that in the chamber J-the valve M will `be automatically closed and will prevent a refiux of the water from the tube L L' intothe 'supply-chamber J. While this valve remains @closed the supplemental inlet M" performs no function and the tube L L operates substantial-ly as itit were a continuous tube.

Fig. 2 of the drawings represents an alternate construction, showing how the supplemental inlet and a valve for controlling it automatically can be formed whollyin the combining and delivery tube and be arranged in` .the casing of an inspirator as 4nowmanutactured without making any material change` in said casing for their reception. In this figure E is Vthe steam-jet tube or nozzle of the lifter, and F F the lifter combiningand delivery tube, which tube is made of two pieces F and F', joined by screw-threads, as shown,

and screwed into and held in position in the partition-T. Vithin this combining and delivery tube an annular chamber G is formed, which communicates with the water or suction chamber C through the ports or passages f f g g `and with the interior of the tube through the opening between the adjacent ends of the two portions F and F. An automatic annular valve G, seated on the inner upper end of the lower portion F of the tube and encircling and loosely fitting the cylindrical lower end of the upper portion F within the casing' G', controls the supplemental inlet formed'by the ports f fg g in.

the'lower portion F of .the tube. This construction of a lifter is substantially the saine as is shown in said Patent No. 405,992, Figs. l and 2. The forcer of Fig. 2 is similarly constructed. K is the steam-jet tube or nozzle, and L L the combining and delivery tube. Its supplemental inlet is formed by the ports fm m p p and space M between the two portions LL of the tube. It communicates with the forcer supply-chamber J and is controlled by the valve M in the chamber O in the tube The arrangement ofthe passages or ports m m and lo p are more clearly shown in Fig. 3,which is a horizontal section through the tubeL on dotted line xx, and the arrangement of the similar ports in the liftertube F is substantially identical therewith.

The operation of the apparatus shown in Fig. 2, being the same as that shown in Fig. l, needs no further description.

An injector constructed as shown in said figures possesses all the advantages of the inspirator, and in addition it will operate with more efficiency over a greater range of steampressures, especially on long lifts and with hot supply-water, and over the range of steampressure at which an inspirator withordinary continuous tubes of similar bore and proportions is usually operated my improvement will increase the quantity of water delivered, more especially on long lifts with comparatively high pressures ofsteam.

With an injector constructed as shown in Figs. l and 2, operating under certain favorable conditions ot' lift, steam-pressure, temperature of supply-water, and quantity delivered, no injurious excess of pressure willlbe created in the combining and delivery tube ofthe lifter or of the forcer atthe inlet, even though one or `both ofthe Valves G and M be removed from the'casing, and yet an advantage will be obtained by reason of the supplemental inlets G and M; but, as when theinjeetor is operated under more unfavorable conditions, suchexcess of pressure will be created which will require one,and sometimes both, of the valves to close the respective inlet or inlets, I` prefer to use the said valves,

combining and delivery tube as communicating with the interior of the tube at or near the throat, where the velocity of the iiuid is at its maximum, and hence where the press- An advantage will be obtained by both combinations.

ure in the tube is thought to be atits minimum; but I do not limit myself to this exact location, as they will evidently perform their function with some degree of efficiency if they v communicate with the interior at some other point along the axis of these tubes betweenY the mouth and delivery end. More than one supplemental inlet to each combining and delivery tube, communicating with its interior at different points along the axis of the tube and with the water-supply chamber, with a separate'valve to control'each inlet independently, may be used, and as the valves would not then necessarily open or close simultaneously doubtless better results would be obtained and a more uniform pressure be maintained Within the'tube than with the single inlet and valve I have shown and described;l

vbut the latter construction, being more simple and less'expensive to manufacture, is therefore deemed preferable.

Although I have shown and described'my improvement applied to a lifter and to a forcer having central steam-jet nozzles, yet it is alike applicable to those having annular ones, and therefore I do not propose to limit thes'cope of my invention by confining its use to injectors that have central steam-jets only. It is also applicable to those double injectors in which the lifter discharges directly into the mouth of -the combining-tube of the forcer, instead of into an intermediate chamber, (as

J in the drawings.) The supplemental inletto the forcer combining and delivery tube in this injector could then communicate with the suction-chamber or with the delivery-tube "of the lifter through a suitable conduit leading therefrom.

In the combined lifter-and forcer arranged and constructed as hereinbeforedescribed and shown in the drawings-there is a co-operatiou and interdependence of action of the parts, the Vresult` ofwhich is anl improved and more certain operation of the apparatus to suppl yi 'water to a boiler than can be obtained in the other forms of combined Vap paratus heretofore made and used.

As indicated hereinbefore, `one partfof my injector will adapt its action to that of the IOO IIO

other part, with theresult of makingthe op bersof the lifter andforcer to the'spaces be-v tween therespective combining and delivery tubes. Inrsuch case, as already set forth hereinbefore, injurious excess of pressure in the combining and delivery tube of the lift-er or at the inlet ofthe forcer will be prevented when' the injector is workingunder favorable conditions.

To further improve the operation of the ap:- paratus and make it more certain, evenunder unfavorable conditions ofv steam-pressure, height of lift, and temperature of water, I make .use lof the automatic valves which have been-shown and described. The-useof one of-'these Valves on` either Y the lifter or forcer is advantageous, though I prefer to supply both? of 'suchrparts offtheapparatus withthe valves. Where'the lifter only is valved and' the forcer has a port oropening fromthe chamber into whichv the. lifter discharges'to the space between its combining and delivery` tube', the automatic valve in the lifter can act to regulate theiwater delivered according to the needs or capacity oftheforcer. Should theflit'ter tend to delilver vmore water than the forcer couldfactupon, sothat thel pressure is-raised in the lwater-chamber between the lifter and'forcer, the valve would, because of back-pressure on the delivery-tube of the lifter, be c1osed,sol as to'diminish the delivery of Waterinto said chamber. On the other hand, if the forcerlshould be delivering more water than the lifter with its Yvalve closed could supply, said valve would, because of the lowering of the'pressure in the communicating chamber `or passage between the lifter and forcer, and consequently in the deliverytube ofthe lifter and the space between the combining and delivery tubes of the latter, automatically open to admit more water to the delivery-tube;

It -the forcer only be provided with the de-v I scribed supplemental automatic valve to close the opening into-the space between its combining andwdelivery tubes whlch communicates with the space or chamber to which al lifter delivers water, it is possible to insure such' action ofthe lforcer as will keep down the pressurein the chamber or space to which the lifter-delivers its water, so that such lifter.

delivery tubes of theforcer, the valvel M.

would be opened to allow water to pass from said `chamber into the delivery-tube,fand lthe pressure against which the lifter would have to act would be diminished, said valve will also, by automatically closing, when' the pressure in the chamber or space to which the lifter delivers tends to get below' th'at between the'combining and delivery tubes of the forcer, act to prevent said pressure from gettingtoo low.

The use of the specified valve on the forcer ofi/a combined lifter land forcer, whatever thek formzof lifter,- for supplying'water tothe water-chamber .of the forcer, isthen'productive of a new and useful result in causingthe action of the forcer to be automatically adj ust-V ed to that of the lifter andconsequently preventing undue back-pressure on the latter.

While the use of one of my supplemental valves on either the lifter or the forcer is advantageous as improving and making more certain the action ofthe apparatus under varying circumstances, I prefer thc construction and combined in any of the ways set forth in my claims, will deliver a greater quantity of` water `than when the lifter and forcer Iare arranged and combinedV as heretofore in the inspirator upon which the apparatus shown and described herein is an improvement.

Having thus described my invention, what I claim is 1. In an injector, a forcerthe combiningk and delivery tube of. which is-provided at its mouth with the usual inlet from the watersupply chamber and is provided, also, with a supplemental inlet formedV by one orJnore ports communicating with the interior of said tube through one or more openings therein and with said supply-chamber, with a valve IOO IIO

adapted to close said supplemental inlet automatically when the pressure within said tube at said' openings therein is about equal to or is greater thanlthe pressure inv said supply-chamber, substantially as andfor the purt pose described.

2. In an injector, a forcer the combining and delivery tube of which is provided at its mouth with the'usu'al inlet from its `watersupply chamber and is provided, also, with a supplemental inlet formed by one or more portscommunicating with the interior of said v tube at said openings therein is about equal to or isl greater than the pressure in said supply-chamber, and a lifter which is suitably adapted and arranged to deliver Wateror other iiuid continuously to the supply-chamber of said forcer, substantially as and for the purpose described.

.3. In an injector, a forcer the combining and delivery tube of which is provided at its mouth with the usual inlet from its Watersupply chamber and is provided, also, With a supplemental inlet formed by one or more ports communicating with the interior of said tube through one or more openings therein and with said supply-chamber, and a lifter the combining and delivery tube of which is provided at its mouth with the usual inlet from the suction-chamber and is provided, also, with a supplemental inlet formed by one or more ports communicating with the interior of thetube through one ormore openings there in and with the suction-chamber, such lifter being suitably adapted and arranged to deliver Water or other fluid continuously to the supply-chamber of the said forcer, substantially as and for the purpose described.

4. In an injector, a forcer the combining and delivery tube of which is provided at its mouth with the usual inlet from its Watersupply chamber and is provided, also, with a supplemental inlet formed by one or more ports communicatingwith the interior of said tube through one or more openings therein and With said supply-chamber, with a valve adapted to close the said supplemental inlet automatically when the pressure within said tube at said openings therein is about equal to or is greater than the pressure insaid supply-chamber, and a lifter the combining and delivery tube of which is provided at its mouth with the usual inlet from the suctionchamber and is provided, also, with a supplemental inlet formed by one or more ports communicating with the interior of the tube through one or more openings therein and with the suction-chamber, such lifter being suitably adapted and arranged to deliver Water or other fluid continuously to the supplychamber of the said forcer, substantially as and for the purpose described.

5. In an injector, a forcer the combining and delivery tube of which is provided at its mouth with the usual inlet from its Watersupply chamber and is provided, also, with a supplemental inlet formed by one or more ports communicating With the interior of said tube through one or more openings therein and with said supply-chamber, and a lifter the combining and delivery tube of which is provided at its mouth With the usual inlet from the suction-chamber and is provided, also, with a supplemental inlet formed by one or more ports communicating with the interior of the tube through one or more openings therein and with the suction-chamber,with a valve adapted to close the said supplemental inlet automatically when the pressure Within this tube at the said openin gs therein is abc ut equal to or greater-than the pressure in the suction-chamber, such lifter being suitably adapted and arranged to deliver Water or other fluid continuously to the supply-chamber of the said forcer, substantiall y as and for the purpose described.

6. Injan injector, a forcer the combining and delivery tube of which is provided at its mouth with the usual inlet from its Watersupply chamber and is provided, also, With a supplemental inlet formed by one or more ports communicating With the interior of said tube through one or more openings thereinand with said supply-chamber, With a valve to close said supplemental inlet automatically when the pressure Within vsaid tube at said openings therein is about equal to o r is greater .than the pressure in said supply-chamber, and a litter the combining and delivery tube of which is provided `at its mouth with the usual inlet from the suction-chamber, and is provided, also, with a supplemental inlet formed by one or more ports communicating with the interior of the tube through one or more openings therein and with the suction-chamber, with a valve adapted to close the said supplemental inlet automatically when the pressure within this v tube at said openings therein is about equal to or greater than the pressure in the suction-chamber, such lifter being suitably adaptedand arranged lto deliver Water or other fluid continuously to the supply-chamber of the said forcer, substantially as and forthe purpose described.

"7. In an injector, a forcer and a lifter, the combining and-delivery tube of the latter being provided at its mouth With the usual inlet from the suction-chamber and provided,

also, with a supplemental inlet formed by one or more ports communicating With the interior oflsaid tube through one or more openings therein and With the suction-chamber,

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with a valve adapted to close said supple.

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