US405990A - church - Google Patents

Description

3 Sheets-Sheet 1.

(Model.)

0. E. CHURCH. INJECTOR.

No. 405,990. Patented June 25, 1889.

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O. E. CHURGH. INJECTOR.

No. 405,990. Patented June 25, 1889.

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No. 405,990. Patented June 25, 1889.

UNITED STATES PATENT OFFICE.

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

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 405,990, dated June 25, 1889.

Application filed July 17, 1888. Serial No. 280,198- (ModeL) To all whom it may concern.-

Be it known that I, CHARLES E. CHUncH, 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 drawiu gs, in which Figure 1 shows a vertical section of my improved injector through the axial lines of the lifting apparatus and forcing apparatus and the valve-connection, a portion only of such connection being shown in section. Fig. 2 is a .horizontal section on line 00 (ref Fig. 1. Fig. 3 is a vertical section through the axial line of the valve-connection, on line y y, and at right angles to the plane of the section represented in Fig. 1, a portion only of the valveconnection being shown in section. Figs. 4: and 5 show plan views of the steam-admission valve on its seat in different positions, and showin section steam-passages leading to the lifting apparatus and forcing apparatus, respectively. Fig. 6 is a plan view of the upper portion of the valve-connection and the top of the overflow-valve, together with the bonnet removed from the machine. Fig. 7 is a horizontal sect-ion through the instrument on line 2 of Fig. 1, looking from above, the seat of the overflow-valve being in section, and the position of the overflow-valve below being indicated by dotted lines. Fig. 8 is a horizontal section of the overflow-valve seat on the same line .2, Fig. 1, looking from above, but the overflow-valve is shown in a different position, as indicated by the dotted lines. Fig. 9 is a plan view of the overflowvalve seat, looking from below, when the valve and bonnet are removed. Fig. 10 is a perspective View of one of the caps which hold in place the steam-j et tube of the lifting and of the forcing apparatus, and Fig. 11 is a similar view of a modification of the cap shown in Fig. 10.

Letters of like name and kind refer to like parts in each of the figures.

My invention is an improvement upon the injector patented to John T. Hancock J anuary 2, 1877, No. 185,861, known as the inspirator, and its object is, first, to so arrange the liftinginjector apparatus of the inspirator relatively to its forcing-injector apparatus that the admission of steam to the steam-jet tube of each and the opening and closing of overflows for each are controlled by two valves connected to and operated by a single stem controlled by a single handle; second, to provide each apparatus of the combined instrument with a free outlet or overflow to the atmosphere substantially in a direct line with the axial line of each apparatus, in order that the fluid issuing from the combining-tube of each may be discharged into the free air in starting the injector by a direct and unobstructed passage, thereby lessening the detrimental effect of friction due to abrupt changes in the course of the discharged current; third, to so arrange the chambers and water-passages in the instrument when it is set vertically with the overflow pipe at the bottom that when steam has been shut off from the instrument the water re maining in it shall. all run out at the over flow-pipe, or back into the well, thereby obviating danger from freezing, and enabling the lifting apparatus to start readily; fourth, to simplify the construction and permit easy ac cess to the several tubes without disturbing the steam-and-water connections, and, fifth, to hold the steam-jet tube of the lifting apparatus and the steam-jet tube of the forcing apparatus firmly in place by means of the cap-nuts which close the top of the steamchamber of each of said apparatus.

The casing of the injector is designated by A B. The pipe for the admission of the actuating steam is to be connected with the chamber S. The pipe communicating with the well or reservoir is to be connected at \V, and the pipe forthe delivery or discharge of water to the boiler is to be connected at K.

The steam-jet tube of the lifting apparatus is at a, and its combining-tube is at (1. Steam is supplied to it from the chamber S through a port 11 in the seat '1 controlled by the portion V of the valve V, and through passage D and chamber D, and the water risesin the passage W and around the exterior of the combining-tube b and enters the latter at th space between the tubes (2 and b.

The steam-j et tube of the forcing apparatus is at c, and its combining-tube is at d. Steam is supplied to it from the chamber S through a port '1) in the seat 1 controlled by the portion V of the valve V, and through passage E and chamber E, and the fluid delivered from the lifting apparatus rises in the passage or chamber J and around the exterior of the combining-tube cl and enters the latter at the space between the tubes 0 and cl. The chamber J as shown in Figs. 1, 2, and 3, extends around the exterior of the lower end of the chamber N hereinafter described, a portion of the delivery-chamber K, and the combining-tube cl.

The steam-admission chamber S is formed in a bonnet which is screwed to the body of the instrument. l/Vithin this chamber is the flat raised seat 1) of the steam-admission valve V, formed on or attached to the body of the instrument. The steam-admission valve V, located within this chamber, is a disk-valve having projections V and V controlling the ports 1) and 12 respectively. A recess is formed in its under side, symmetrical to its axis, into which the flattened end N of the connection N loosely fits, so that the valve must turn when the connection is turned, but which admits of a slight movement of the valve in other directions in order that it may remainin contact with its seat, even if the seat for any reason is not in a plane exactly at a right angle to the axis of revolution of the stem, and to allow for wear of the valve or its seat and fbr wear of the overflow-valve L and its seat, hereinafter described. By removal of the bonnet,within which is the steamchamber S, the valve V can be removed by merely lifting it from off the stem, and access can then be readily had to its seat.- When the instrument is in operation, this valve is held to its seat by the pressure of steamin the chamber S, and the interior contour of the bonnet is so formed asto act as a stop to prevent it from being disengaged from the stem whenever the pressure is removed.

In the body of the instrument a cylindrical chamber N is formed intermediate between and connecting the steam-chamber S at the top of the instrument with the overflow-valve chamber M at its bottom,within which, loosely fitting, the connection N is journaled. The overflow -valve chamber M is constructed similarly to the steam-admission chamber, being formed in a bonnet M, screwed to the body of the instrument. Within this chamber is the flat raised seat 1 of the overflow-valve L, formed on or attached to the body of the instrument and provided with two ports, one Z communicating with the chamber J and the other Z communicating with the chamber'K.

. The overflow-valve L, located within this chamber,is a hollow cylindrical disk-valve ively come in contact with a pin 19, attached to the body of the instrument, limit the motion of the valve. The hollow prolongation O of the valve L projects through the bonnet M, and to its projecting end is attached a handle P, by means of which, in operating the machine, the movements of the valve L and the valve V (by means of the connection N,which is shown as a stem formed integral with valve L) are controlled.

The connection N, by means of which the valves V and L are connected in the intermediate chamber N instead of being made integral with the valve L or rigidly attached to it, may be made independent of it and be loosely fitted in a recess in the valve L like that in. the valve V.

Within the bonnet M, at its lower part, a space is formed to receive an elastic packing M to preventleakage around the tubular prolongation O, which is confined in position by a gland M loosely fitted in the bonnet and around the tubular prolongation O, and by a spring M interposed between the enlarged portion of the valve L and the gland M It is also compressed around the tubular prolongation 0, when the instrument is in operation, by wateradmitted from the chamber K, through the port Z and the depression L in the seating-surface of the valve L, thence around the exterior of the enlarged portion of the valve L in the overflow-valve chamber, and through ports M formed in a shoulder in the bonnet M beneath the valve L. These ports M ar e partially shown in plan in Fig. 7, and one'of; them is shown in elevation in Fig. 1. The object of thus admitting the water into the overflow-valve chamber is not i only to hold the packing-ring M confined in position, but primarily to hold the valve L up to its seat against the pressures which exist in chambers J and K.

In order to prevent the removal of the valve L from its seat when there is no pressure beneath it in the interior of the overflow-valve chamber M a shoulder M is formed, between which and the seat Z there is space enough for the valve L to be moved on its seat freely, but not enough to allow more than a slight movement away from its seat. If the spring M be made stiff enough to hold the valve L to its seat against the pressure in the chambers J and K, the shoulder M in the interior of the overflow-valve chamber will not be, necessary; and if the valve L be then modified so as to shut off the influx of water to the overflow-valve chamber from the deliverychamber K, when the instrument is in full operation, the elastic packing M may also be omitted.

The steam-chambers I) and E are closed at the top by caps F, which not only serve this purpose, but also hold in position the steamjet tubes to and 0. Each is provided with a screw-thread F which fits in the threaded body of the instrument, and with a shoulder F, which, when the cap is screwed down, closes the top of the chamber. One or more projections F Fig. 10, are provided, extending below the threaded portion of the cap, which are made long enough to bear upon the steam-jet tube before the shoulder F comes to its seat on the body. lVhen the cap-nut is screwed down to its seat, the projections F are sprung inwardly, being thereby shortened, and thus hold the j et-tube firmlyin position. This construction allows for slightvariations in the relative distances between these parts, whether due to workmanship or expansion and contraction of the body, or to wear.

Instead of deflecting the spring projections, they may project straight below the cap and be made long enough to bear upon the steamjet tube before the shoulder F comes to its seat. In this construction, when the cap-nut is screwed down, the projections F if made, as they should be, of comparatively small area, will be compressed and will thus hold the stean1j et tube firmly in position. By removing the cap-nuts it is apparent that the steam-jet tubes may be lifted out and easy access had to remove the combining-tubes or obstructions in them.

The operation of the instrument is as follows: lVhen the handle Pis turned to put the valves V and L in the positions shown in Fig. 1, steam is shut off from the apparatus, as both the ports 1 and r are closed, and the ports L and L in the overflow-valve L are partially open, so that an outlet is afforded from both the lifting apparatus and the forcing apparatus to the free air. Upon turning the handle P to bring the valve V into the position shown in Fig. 4 from the position shown in Fig. 1, and by the dotted lines in Fig. 5, steam will be admitted through the portr, the passage D, and chamber D to the steam-jet tube a of the lifting apparatus. The port 42 remaining covered, the steam is still cut off from the forcing apparatus. This movement of the handle P will have turned the overflow-valve L to the position shown in Fig. 8, so that its port L will register with the port Z in the seat Z, and the port L will register with the enlarged lower part of the port Z An unobstructed passage to the atmosphere from the chamber J is thus afforded through the ports Z L and the hollow pro- 'longation O. A portion of the steam may pass up through the chamber J and through the combiningtube d of the forcing apparatus into the chamber K, whence it will have free course to the air through the ports Z and L and the hollow prolongation 0. When water rises from the well or reservoir as a result of this action of the lifting apparatus, it will pursue the same course through the instrument as did the steam, and it will be discharged at the lower end of the hollow prolongation 0. When the water appears at 0, (showing that the lifting apparatus is in operation,) the handle P is turned farther in the same direction as before, and the port L of the overflow-valve will be moved so that it will cease to register with the port Z, while the port L will still register with the port Z In the meantime the port r will remain open, and the port o through which steam is admitted to the forcing apparatus, will remain closed until at or about the time when the overflow from the lifting apparatus is cut off by the valve L. The lifting apparatus will now be fully in operation, and the water delivered from it must pass through the chamber J, through the combining-tube (Z of the forcing apparatus, and into the chamber K, whence, as before, it escapes to the atmosphere through the 1101- low prolongation O. The handle P being now turned still farther in the same direction as before, the port 11 in the steam-valve seat will be opened and steam will thus be admitted through the passage E and chamber E to the steam-jet tube 0 of the forcing apparatus, where it will act upon the water passing through the tube (Z and accelerate its velocity. After the port o is wide open the fart-her movement of the handle P in the same direction as before will cause the port L to no longer register with the port Z in the seat, and consequently the escape to the atmosphere through 0 will be out off and the water discharged from the forcing apparatus will be delivered to the boiler through a pipe connected to the chamber K. The steamvalve will then be in the position shown in Fig. 5 and the overflow-valve in that indicated by dotted lines in Fig. 7, the stop L being in contact with the pin p. The combined apparatus will now be in full operation, raising water and delivering it to the boiler, as does the inspira'tor. The overflowvalve L, as has been described, will be held tightly against its seat by water admitted from the chamber K through the port Z the depression L around the exterior of the enlarged portion of. the valve, and through ports M beneath the valve, and at the same time the packing M will be held compressed, so as to prevent any leakage around the eX- terior of the prolongation 0.

Instead of the packing M and gland M located as described, a stuffing-box of the usual construction may be applied on the outside of the bonnet.

Chamber N need not be closed, for the steam-valve V, if tight, prevents any access of steam to this chamber, and the overflowor the chambers J and K, and vice versa, and

thus leakage is doubly guarded against.

Itis obvious that my improved arrangement of the steam and overflow chambers with the valves controlling, respectively, the admission of steam and the overflow to the atmosphere, is equally well adapted to a single lifting apparatus or forcing apparatus as to the combined apparatus herein shown and described. For example, if a lifting apparatus only is desired, the portion V of the valve V and the corresponding port v in its seat would be dispensed with, the port L would be closed, the tubes of the forcing apparatus and their inclosing-chambers would be removed, and the chamber J would be made to discharge into the chamber K. The port Z should remain to aiford a connection with the overflow-chamber, as before. If a forcing apparatus is desired, it would only be necessary to substitute the tubes 0 and cl for the tubes at and b in the chamber in the casing A of the apparatus as modified for a lifting apparatus.

Having thus described my invention, what I claim is- 1. In an injector, a steam-chamber containing a valve to control the admission of steam, and an overflow-chamber containing a valve to control the overflow to the atmosphere, the two chambers being connected by an intermediate chamber N communication between the steam-chamber and the overflow-chamber through the intermediate chamber being prevented by one or both of the valves, substantially as described.

2. .In an injector, a steam-chamber and an overflow-chamber, a valve in the former'to control the admission of steam and a valve in the latter to control the overflow to the atmosphere, the two valves being connected to and operated by a single stem, substantially as described.

by a stem extending through the valve-seats,

leakage around which is prevented by the valves, substantially as described.

l. In an injector containing two sets of jet apparatus, a steam-chamber and an overflowchamber, a valve in the former to control the admission of steam to each apparatus and a valve in the latter to control the overflow to the atmosphere from each, the two valves being connected to and operated by a single stem, substantially as described.

5. In an injector, a steam-chamber and an overflow-chamber, and an intermediate chamber N connecting the two, the steam-chamber being provided with a valve to control the admission of steam, the overfiow-chamber with a valve to control the overflow to the atmosphere, the two valves being joined by a connection inthe intermediate chamber, whereby the movement of one of the valves operates the other, substantially as described.

6. In an injector containing two sets of jet apparatus, the combining-tubes of which converge in the direction of the fiow of the fluid through them, an outlet or overflow passage to the atmosphere, located substantially in line with the respective axial lines of the two combining-tubes, whereby the fluid issuing from each combining-tube is discharged into the free air by a direct passage, substantially as and for the purpose described.

7. In an injector, a valve controlling the admission of steam and a valve controlling the overflow to the atmosphere, the two valves being connected to each other and operated the one by the other, the discharge-outlet from the over flow-valve being formed within a prolongation of that valve, substantially as described. 8. In an injector, an overflow-valve located in a chamber the interior of which is provided with a shoulder, between which and the valve-seat there is space enough to permit the valve to be rotated freely on its seat, but not enough to allow more than a slight movement away from its seat, substantially as and for the purpose described.

9. In an injector, an overflow-valve having a discharge-outlet to the atmosphere formed in its prolongation and located in a chamber, in combination with a spring whereby the valve is held against its seat, substantially as and for the purpose described.

10. In an injector, an overflow-valv'ehav- 'ing a discharge-outlet to the atmosphere formed in its prolongation and located in a chamber, a passage from the delivery-chamber of the injector extending into the overflow-valve chamber and beneath the exterior of the valve, whereby, when the injector is in operation, the valve is held against its seat by water under pressure, substantially as described.

11. In an injector, an overflow-valve having a discharge -outlet to the atmosphere formed in its prolongation and located in a chamber provided with elastic packing about the exterior of the prolongation, a passage from the delivery-chamber of the injector extending into the overflow-valve chamber, whereby, when the injector is in operation, the valve is held against its seat and the packing about its prolongation is compressed by pressure of the fluid thus admitted to the overflow-Valve chamber, substantially as described.

12. In an injector, a cap-nut F, provided with a shoulder F, a screw-thread F and one or more projections F in combination with the casing of the injector and the steamjet tube, whereby, when the cap-nut is screwed to its seat, the steam-chamber is closed and the steam-jet tube is held firmly in position, to

substantially as an d for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand this 22d day of May, 1888.

CHAS. E. CHURCH. Witnesses:

ELMER P. IIoWE,

HARTLEY F. ATWOOD.

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