US537279A - Sylvania - Google Patents

Description

I V 2 Sheets-Sheet 2. T. M. EYNON 8v J. W. GAMBLE Mod e1-.

INJECTOR.

Patented Apr. 9, 1895 UNITED STATES PATENT Fries,

THOMAS M. EYNO N AND, JOSEPH W. GAMBLE, OF PHILADELPHIA, PENN- SYLVANIA,ASS1GNORS TO THE EYNON EVANS MANUFACTURING COM- PANY, OF PENNSYLVANIA.

INJECTOR.

- SPECIFICATION forming part of Letters Patent No. 537,279, dated April 9, 1895.

' Application filed May 26,1894. SerialNo. 512,504. (Model) Toall whom it may concern.-

Be it known that we, THOMAS M. EYNOYN and JOSEPH WILLARD GAMBLE, citizens of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in .Injectors, which improvement is fully set forth in the following specification and ac companying drawings. P

Our invention relates to that class of injectors known as the double tube injector, and our object is to construct a compact and symmetrical injector, embodying all the essential features of Patent No. 497,269, granted to Thomas M. Eynon, as regards accessibility to all portions of the interior, and simplicity of working parts, and to incorporate some additional features, which will be hereinafter referred to.

Figure 1 represents a longitudinal section of an injector embodying ourinventionj Fig. 2 represents a horizontal sectional view ofthe casing, taken on the line 02, cc, of Fig. 1. Fig. 3 represents a transverse section on line 00, :20, Fig. 1. Fig. 4 represents a longitudinal section of an injector, showing the connections for throttling, arranged exteriorly of the injector casing.

Similar letters of reference indicate corresponding parts in all the figures.

Referring to the drawings: A designates the body or casing of the injector; B, the

steam inlet; 0, the water supply inlet, and D the outlet to the boiler.

Steam entering at B passesinto the chamber E, which is provided with a valve body F, which has a valve seat G, said valve F being hollow and containing a second valve, as will be hereinafter explained, and being adapted to close a passageleading to the forcing steam chamber H,which supplies steam to the foreing nozzle K.

Ldesignates the suction steam chamber, which supplies steam to the suction nozzle M, which is suitably secured to the partition V the admission of steam tothis chamber being controlled by the valve N,which we term the secondary valve. 0 designates passages leading to said chamberL, as shown in Fig. 3 especially a communication being effected between said chamber and the chamber-E by -1neans of the said passages 0, port P and the opening A in the valve F.

, Q designates an opening in the end of the body- F, in which the valve stem R moves freely.

S designates a chamber connecting the discharge end of the suction combining tube T, with the supply end of the forcing combining tube U, into which the nozzle K projects a short distance.

The tube U has its screw-threaded portion R which engages a partition N between the chambers S and W. The end S 'of the tube U passes through the diaphragm T substantially sealing the chamber W from the chamber E. V designates the suction chamber into which the water is first conducted. T is suitably secured at W to the partition which separates the chamber V from the chamber S.

W designates a chamber having communication with the atmosphere by means of the passage Z, and the cored passages X, which The tube lead downwardly and then turn into the overflow nozzle Y, as shown in dotted lines in Fig. l, at the right.

Through the chamber W water can escape freely from the suction combining tube T and chamber S through the check valve A, passages Z and X to the atmosphere when starting the injector.

The check valve A is located in the partition between the chambers S and N, and has its seat in the screw-threaded ring B, which has the cage 0', cast thereon, the valve A being guided top and bottom by wings.

The plug D is cast integral with the ring B and cage 0, which extends above and below said ring, and has the openings U for the passage of fluid. Access can be had to said valve A and its seat B, and both can be removed at the same time for inspection or reairs b sim ly unscrewing the ring B, the P Y P plug, seat, valve and cage being withdrawn together, it being noticed that the portions of position by the latch O, which is pressed downwardly by the spring P, so that it can engage in slots in the are or quadrant R. The latch O is raised by pressing the bent lever S, which is pivoted. at T, toward the handle G.

U designates an arm carrying thearc or quadrant R and is connected to the handle G. by the pin V. The armUis secured to the valve stem R. as at Y, and.is bored out at Z so thatit can slide on the elongated stullingbox \V, which formsa guide forthe same, thus relieving the valve stem R from any injurious bending strain.

The valve body F which isadapted to be seated at G, is madein the form of a hollow shell or barrel, and is provided with thevop enr ing A for the admission of steam.. In said shell moves the enlarged head .X ofthe valve stem R, which has suitably secured to it. the valve N, whiclris adapted to closethe port P in the, valve F, which leads to the chamber 0.

The port between the chamber H and the passages O, is closed by means of the piston B which is integral withthe valve body, F.

The hollow portion of the valve]? is made long. enough to allow amovementof. the en: larged head X and the valve N, equal to the amount required for regulation, so that the initial movement of the handle G will move the valve N from its seat, bringing the enlarged head X against the. shoulder inside the valve F, opening the port P, and allowing steam. to enter the passages O, anda further movement of said handle will move thevalve F from its seat G... The valve F is connected by means of the stems Y and Z" with the overflow valve A and the throttle piston B said stems passing through thestufting boxes C and D which prevent the escape of steam from the overflow while the injector. is inoperation. The valve N is secured to the en.- larged head X. in any suitable manner, in the present instance by a pin.E

F and G designate. plugs in the casing A, by. removing which,.access can. be readily had to the interior.

The check valve H in the discharge open.- ing of the injector is seatedonthe ring K which can be readily removed. The ringL acts as a stop,limiting the movement of said valve which is provided with wings similar to the valve A. The nozzle K is screwed into the partition Miand extends a short distance into the tube U, which is screwedinto the partition N The valves A and B are adapted to open and close the apertures in the parti tions O andP as will be hereinafter set forth.

The operation will now be apparent. Assume the parts to be in the positions shown in Fig. 1. G to the left, moves the valve N from its seat on the. port P, allowing steam to pass from the chamber E, through the passage A and port P intothe passages O, which lead downwardly into the chamber L. The steam then blows through the suction nozzle M, and the suction combining tube T lifts check valve A and escapes through the chamber W, passages Z and X into the nozzle Y to the atmosphere. Thesteam blowing through the nozzles, as just described, produces a vacuu m in the chamber V, which causes the water to enter therein, passing thence through the suction combining. tube, T, condensing the steam in itspassagc, liftingthecheck valve A, passingthrough chambers W, Z, and X, and nozzle Y, and finally. making its exit into theatmosphere. A.further movement of the handle G, causes the enlarged head X of the valve stem, to come in contact with the interior of the valve F, withdrawing the same from. its seat, but steantis prevented from entering theforcing chamber H by the piston Qfbn the valve F,.until the piston 15 has moved far enough to close the port in the partition, P to the atmosphere. 'A still. further movement of the handleG allows steam to freely flow into the forcing chamber II, and to enter the forcing nozzle K, pass through the. combining, tube U, where it comes in contact with a stream of water, which is.already being delivered through said combining tube U, by the suction tube '1, the speed of the water being accelerated by the steam from the forcing nozzle K. The water is still permitted. to escape through the passages E, F and X, into the atmosphere, but as the valve A 'is gradually closed the communication is shut off. between the chamber E and the atmosphere, and the water which has now attained a high velocity, rushes through the tube U, opens the check. valve H and is conducted. to the boiler or elsewhere- The injector is now delivering its maximum quantity of water,.and if it is-desired toregulate the same, the handle G is moved forward sutiiciently to cause the valve N to partiallyclose the port P, thereby throttling the steam entering the. suction chamber, L, whereby the quantity of water entering the boiler can. be reduced 'fifty per cent. of the maximum capacity.

It is of course obvious, that the throttling of the overflow passages may be effected by means of connections direct from the valve stem R, to the valves whichcontrol said passages,.which connections may extend outside the injector casing ifdesired.

In Fig. 4 I have shown, for the most part in full lines, the, preferred arrangement and location of the external connections, the overflow passages being arranged vertically in A slight movement of the handle the present instance instead of horizontally, as seen in Fig. 1, the object and function however being the same as in said figure.

A designates a stud which is attached to some portion of the arm U, and which is engaged by the walls of the slot 13 in one end of the bar C the other end of said bar being pivotally attached to an end of the lever D by means of astud M, which latter is attached to a suitable portion of the stem Y, said lever D being fulcrumed at E the other end of the same being pivotally attached to a link F and the other end of the latter being pivotally attached to the arm G of the bell crank H, the other arm K of said bell crank being suitably connected in the present instance by an intervening link,-to a sleeveL in the vertically-exteudin g overflow passages, by which means the throttling is effected.

B designates the valve piston which is capable of longitudinal movement as is evident.

The operation is the same as has already been described, the first movement of the handle G, acting to withdraw the head N, so as to open the port P to live steam which passes into the chamber L, as before, the stud A moving freely, in the meanwhile, in the slot B. A further movement of the handle G causes the said stud to contact with the wall N of the slot 15, whereupon by reason of the connection between the bar (3 and the stem Y, the head F will be moved from the seat G, thus allowing live steam to flow into the chamber H, the throttling in the meanwhile being simultaneously effected by means of the connections D F, H to the sleeve L the 7 functions of the different parts being the same, and occurring in the same sequence, as has already been described with respect to Fig. 1.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In an injector, a casing,a double seated valve body, a suction chamber and a forcing chamber, a secondary valve controllinga passage leading to the suction steam chamber, and the valve body controlling a passage leading to the forcing steam'chamber, said valves being connected axiallyin line with the overflow valve A and the throttle piston B said valves A and B controlling passages leading from the interior of the casing to the atmosphere, said parts being combined substantially as described.

2. In adouble tubeinjector, asuction chamber, a forcing chamber, steam inlets therefor, a valve device for said inlets, a chamber W having passages leading therefrom to the overflow and main discharge respectively, valves controlling said passages, mechanism for positivelyactuating said last mentioned valves, by the first mentioned valve device, a chamber S adjacent said chamber W, and a check valve between said chambers, said parts being combined substantially as described.

3. In an injector, a suction steam chamber,

a valved steam inlet therefor, the nozzles M and T, chambers S and WV, a check valve between said chambers,-a passage leading from said chamberW to the main discharge of the injector, a second passage leading to the overflow, a valve device for said passages and means for positively actuating the same, the above parts being combined substantially as described.

4. In a double tube injector, a double seated valve structure or body, adapted to contact the steam inlets, to the suction steam chamber and the forcing steam chamber respectively, said valve body having the port P leading to the suction steam chamber andcontrolled by the valve N, the chambers S and IV, overflow and discharge passages leading from said chamber, a check valve interposed between said chambers, S and NV, a seat B for said valve, said seat having attached thereto, the cage Oand the plug D the latter contacting with the injector casing whereby by the removal of said plug, the seat, valve and cage are simultaneously withdrawn, substantially as described. I

5. In an injector, the combining tube U,

suitably secured in a partition between the chambers S and'W, said chamber W having valved passages communicating with, the atmosphere, the discharge end of said tube terminatingin a.chamberE,and passing through the diaphragm T whereby the chamber E is substantially sealed from the chamber W, a suction inlet and a valve controlled steam inlet for said combining tube, said parts being combined substantially as described.

6. In adoubletubeinjector, adouble seated valve structure or body adapted to control the steam inlets tothe suction steam cham-. ber, and the forcing steam chamber, the said valve body having a port Pleading to the suction steam chamber controlled by the valve N, whereby the capacity of the injector may be regulated by a movement of the handle which actuates the whole valve body, in com- IIO bination with overflow and discharge passages, said parts being combined substantially as described. V

7. In a double tube injector, a forcing steam chamber, a suction steam chamber, a double seated valve body F, comprising a suitable shell or barrel having the piston Q adapted to be seated at G, and the port P controlled by a valve N, said valve structure controlling the passage between said chambers, an overflow leading from the suction chamber S to the atmosphere, and controlled by .a valve device A connected to the valve structure F in such a way that thethrottling of said overflow passage is efiected simultaneously with the admission of steam to the forcing nozzle K, said parts being combined substantially as described.

8. In an injector, the elongatedstufling box W, adapted to serve as a guide for an arm U, connected to the valve stem B, said arm being suitably attached to a handle G the latter having a connection at its end with a fixed point, said parts being combined substantially as described.

9. In an injector, an unthreadcd plug, connected by an apertured cage, to a threaded ring, the latter being adapted to engage a partition in said injector, and the plug adapted to engage the injector casing and to form a closure for the same, substantially as described.

10. A plug connected by an apertured cage to a threaded ring, adapted to serve as a valve seat, a check valve provided with wings on each side which serve to guide said valve above and below its seat, said plug, cage and ring being integrahsubstantially as described.

11. In a double tube injector, a forcing steam chamber and a suction steam chamber. valved steam inlets therefor, a chamber W having a valved passage leading to the overflow, a second chamber E having also a valved passage leading to the overflow, means for actuating the above valves by one handle, whereby theoverflow from a chamber W will first be throttled, then the overflow from the chamber E, substantially as described.

12. In a double tube injector, a forcing steam chamber, a double seated valve body separating said chambers and adapted to control the admission of steam to both, the chambers V, S, \V, and E, suction and forcing combining tubes, a check valve between said chambers, Sand W, overflow passages leading from the chambers W and E and means for positively controlling and throttling said passages, the above parts being combined substantially as described.

13. In an injector, the casing A, chambers II, 0, M, V, S, W, and E valved passages leading from the last two chambers to the atmosphere, the valve body F constructed as shown, having the stem R, valve N and port P, and connections to valves A and B nozzles K and M, tubes U and T, and check valve A, said parts being combined substantially as described.

14. In a double tube injector, constructed substantially as shown, and provided with the adjacent chambers S and W, the check valve A adapted to seat on the ring B, said ring having a cage and a plug D cast integral therewith, said parts being combined substantially as described.

15. In an injector, a suction chambcr,a suction combining tube, a forcing combining tube, a chamber S connecting the same, a chamber W through which said forcing combining tube passes, the discharge end of the latter being outside of said chamber, suitable overflow passages, and a check valve located between said chambers and said overflow, substantially as described.

16. In adouble tube injector, a forcing and suction steam chamber, a double seated valve structure actuated by the valve stem R for controlling the passage between said chambers, suction and forcing combining tubes, an overflow leading from the suction chamber to the atmosphere, and an overflow passage leading from the main discharge to the atmosphere, valve mechanism for controlling said overflows and. adapted to be operated in unison with the valve stem R, substantially as described.

17. In a double tube injector, havinga suction combining tube and a forcing combining tube, chambers into which said tubes discharge, a separate overflow passage for each of said chambers, and means for positively throttling said overflow, substantially as described.

18. In a double tube injector, a forcing steam chamber and a suctionsteam chamber, a double seated valve structure controlling the passage between said chambers, a suction combining tube, and a forcing combining tube, chambers into which said tubes discharge, a separate overflow passage from each of said chambers, and means for positively throttling each of said overflow passages, said means being actuated by the same device which moves said double seated valve structure, substantially as described.

THOMAS M. EYN ON.

J OSEPII W. GAMBLE.

Witnesses:

JOHN A. WIEDERSHEIM, R. H. GRAESER.

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