US1218498A - Valve. - Google Patents

Description

1. Q. WALTON. VALVE.

v ,PPLICATION FILED SEPT. 23, l9I 0. 1,21 8,498. Patented Mar. 6, 1917. v 2 SHEETS-SHEET 1- 1. Q. WALTON.

. VALVE. APPLICATION FILED SEPT. 23. [910.

i. Q 8 w m A 1 M PA F/ JOHN Q. WALTON, OF WASHINGTON, DISTRICT OF COLUMBIA,

VALVE.

l m...- Specification of Letters Patent.

Application filed September 23, 1910.

To all whom it may. concern:

Be it known'that 1, JOHN Q. /VALTON, a citizen of the United States, residing at lVashington, in the District of Columbia,

have invented new and useful Improvements in Valves, of which the following is a specitication.

This invention relates to certain improvements in valves,- and consists of several new features of construction and combinations of parts substantially as hereinafter described and particularly pointed-outin the subjoined claims. Theimprovements embodied in the present invention are particularly but not exclusively applicable to steam stop valves and this application of the invention, which is preferred, accordingly is shown in the accompanying drawings and will be hereinafter described in detail witl out however intending to restrict the invention, considered in itsbroadest aspects, thereto. 1 One of the important purposes of the presenti invention is to provide a means which will prevent the danger of a ruptured steam connection by a water ram or hammer caused by the careless or sudden opening of a stop valve. v

Another of the important purposes of the present invention is to provide a valve which will operate automatically to cut off the flow of fluid, under pressure to the connections in the event of an accident in the latter.

There are other purposes of the invention scription.

In accordance with the foregoing stated purposes the present'invention embraces:

First, a stop valve comprising a main valve and an auxiliary valve, arranged be tween steam connection and a source of supply of steam to said connection; the auxiliary valve being provided with means for opening it manually and when so opened f establishing communication of the steam connection with the source of supply, so re .stricted however that the steam connection fills gradually, whereby the temperature of the steam connection is gradually raised and the pressure in the steam connection is caused gradually to approach the pressure in the source of supply; the main valve bewhich will appear from the hereinafter de- 7 than that in the Patented Mar. 6, 1917. ste m. 583,448. I i

ing provided with means whereby it is automatically operated to uncover its port in the passage between thesource of steam supply and the steam connection when the pressure in the latter has attained one pre determined with relation to that in the source of supply, the predetermined relative pressures at which the main valve shall automatically open being such that the main valve is opened only when the pressure in the steam connection has attained a degree which precludes all danger water rain or hammer, such as might result in a ruptured steam connection, produced when full communication offthesteam connection with the source of steam supply is established;

SecondaA stop valve comprising-a main valve and a manually-operated auxiliary valve arranged between a steainconnection and a source of supply of steam to said connection, the auxiliary valve when opened serving to establish the previously mentioned restricted communication of the steam connection with the source. of supply and being so located with relati'onj'to the steam connection and stop valve that when it has been opened the steamconnection and stop valve will be thoroughly draine'dand the tcmperatru'e thereof and pressure therein gradually raised before the admission of steam under full pressure is permitted.

Third: A: valve arranged in the passage between a connection and a source of supply of fluid, under pressure, and having means whereby it is automatically operated under centrol of predetermined relative pressures in the connection and source of supply, the valve being held 'toits seat and serving to cut off communication of the connection with t source of supply, through the port within said seat, when. the pressure in the connection is at a predetermined degree less source of supply, whereby, as a consequence of any sudden lowering of the pressure in theconnection,"suchas would be caused, for example, by anaccident to the of there being a dangers to life and propert which may ex- 3 ment of parts and in certain novel combinations of elements substantially as hereinafter described and particularly pointed out in the subjoined claims.

In the accompanying drawings there are illustrated several slightly difi'erent forms of stop valves to exemplify what is now regarded as the best embodiments of the present invention. It is to beunderstood, however, that the invention considered in its broader aspects is not restricted to these particular embodiments and that changes may be made therein without departing from the spirit of the invention, or the scope of the subjoined claims. It, further,.should be understood that the particular illustrated embodiments have several important advantages over other means capable of carrying into practice the fundamental purposes of the invention hereinbe'fore particularly named, and for this reason said particular embodiments are specifically made the subject matter of some of the sub'joined claims.

Tn the drawings:

Figure 1 is a view partly in elevation and partly in section of one form of stop valve embodying the present improvements, showing the parts in the position they occupy to hold the valve against being accidentally opened. Fig. 2 is a section on the line 2-2 of Fig. 1..

' 'Fig. 3 is a section on the line 3-3 of the same. I

Fig. at is a view similar to Fig. 1 of a slightly different form of valve embodying my improvements.

Fig. 5 is a similar view of another form of valve embodying the present improvements.

Fig. 6 is a section on the line 6-6 ofFigs. l and 5.

Fig- 7 is a detail view showing the relative position of parts when adjusted for operation of the valve.

Fig. 8 is a detail view of a stop for supporting parts when the valve is being overhauled. I

Similar characters of reference denote corresponding parts in all the views.

In all the different forms of the present valve, herein exemplified, there is a body,

marked 10, which is provided with a chamber, marked 11, having an outlet 12, and an, inlet 13. This inlet is controlled by a valve, marked it, whose seat is marked 15. When this valve 14 is fully opened, the steam pipes connected with the outlet 12 are thrown into full communication with the boiler, marked A. If this occurs when the body 10 or the steam pipes are cold, or if,

through carelessness or otherwise, the valve is opened quickly, instead of slowly and gradually, a water hammer or ram results, with consequent danger of a ruptured steam connection, and when a ruptured steam connection occurs the communication between said connection and the source of steam supply must be instantaneously cut oil, to save men in the immediate vicinity of the rupture from being scalded, andalso to save possible dangerous boiler explosion. To eliminate all liability of a ruptured steam connection made possible by the use 01? a valve which can-be fully opened or opened too widely before the steam connection is in condition safely to receive full, or approximately full, steam pressure and which when so opened will permit the steam to be supplied vided an auxiliary steam' connection from the boiler, whereby the steam initially enters the pipes in quantity such as to cause a gradual heating thereof, and the valve 1% is maintained upon its seat until the steam pipes have become thus heated. The valve l l is provided with means whereby it is then automatically opened to permit the full pressure of the steam from the boiler to enter the steam connection. 7 V

The auxiliary steam connection hereinbefore referred to preferably comprises a chamber or channel 16 which communicates with the chamber 11 and is provided with a manually-operable valve 17 by which it may be opened and closed. As one of the important factors in the total elimination of water hammer or ram when steam is admitted to the steam connection the auxiliary valve 17 is so arranged that when it has been opened any water in the steam connection and, preferably, also in the body 10, will be automatically drained bygravity from said connection and body while steam of small volume is being admitted thereto, thereby, further, eliminating the necessity of draining the steam connection by a separate operation before admitting steam to the same;

The operating means for the valve 14 may comprise both a spring 18, and a differential piston 19, mounted on the valve stem 20, as shown in Fig. 4t, or the dilierential piston may be omitted, as shown in Fig. 1, or the spring may be omitted, as shown in Fig. 5; or in fact other than the means herein illustrated, capable of holding the valve 1a to its seat until a predetermined pressure or temperature has been reached in the steam connections, or of opening said valve when such predetermined pressure or temperature h as been at tained, may be resorted to, without departing from the spirit defined by some of the hereto subioined claims. V I

Having thus, in a general way, set forth of the invention as some of the main or most important features of the present invention, I will now particularly describe the embodiments thereof illustrated to exemplify its most satisfactory forms.

The body 10 may be suitably mounted, as shown, on a boiler A, or in any other suitable location without departing from the spirit of the invention. This body in the forms shown in Figs. 1 and 4 is provided with a cover or bonnet, which extends a frame, preferably of open formation. This frame is of a length adapt ed to contain the spring 18, and preferably is composed of spaced arms 22 relatively disposed to form a yoke having a bearing 23 at its end remote from the bonnet.

Within this frame are spring abutments 24 and 25 which are relatively adjustable to regulate the power of the spring. In the exemplified arrangement both abutments are adjustable. The abutment 24 is shown as provided with a sleeve 26 which is slid ably fitted to the valve stem 20. This sleeve is externally threaded and engaged by anwhich is mounted adjusting nut, marked 27,

a hand wheel 28 in the bearing 23 and has for adjusting it. longitudinal movement, preferably by having a flange 27 which engages the inner end of the bearing 23, while its hand wheel 28 bears against the outer surface of the bearing. F or preventing rotative movement of the abutment 24 and guiding it in its reciprocatory movement, it is preferably provided with radially-arranged arms 24 suitably engaged with the frame. In the illustrated embodiment, the arms 22 of said frame are provided with ribs or flanges 22 which extend longitudinally thereof and are received by recesses 24 in the arms, respectively, as shown best in Fig. 3. V

The lower abutment, 25, is similarly shown as provided with radial arms, 25 whose ends engage the ribs or flanges 22 and serve to guide the valve stem in its reciprocatory movement. The ribsor flanges 22 are provided with cut away portions, marked 22, for convenience in assembling and disassembling the parts.

It will now be seen that the spring 18 may be placed in compression by the abutment 24 and that this compression may be variably regulated by adjustment of the abutment 24. It will also be apparent that the valve is automatically opened by the spring, when the power of the latter, added to the pressure of the steam acting on the valve in the same direction, overcomes the force of the steam acting contrary thereto. Hence, it becomes possible so to co-relate the forces that the valve will be maintained in closed position until the valve body has become heated sufiiciently to avoid a water ram or hammer, all danger of which will marked 21, from This nut is held against indicated in Fig. 7.

be completely avoided 'When the spring is set to open the valve when the steam pressure in the st am connection and the body of the valve is practically equal to that in the boiler and the pipe orconnection.

In all the illustrated embodiments of the invention, the valve stem 20 is made hollow and formed to provide the hereinbefore referred to chamber or channel'l6, and the latter has communication with the chamber 11 throughports 29 in said valve stem.

he auxiliary valve 17, by which communication of the chamber 11 with the boiler A is controlled, is shown as provided with a stem 30 which extends longitudinally through the val .-'e-ste.in 20 and has a handwheel 31 for adjusting it to and from its seat 32 formed upon the valve 14.

The seat 15 for the valve 14 is preferably formed on a hollow member 33 separate from the body 10 and threaded or otherwise removably secured to the latter, as shown. The inlet 13 hereinbefore referred to is inthis member. A spider, marked 34, or other suitable means, preferably integral with the member 33, is provided as a guide for the valve-stem. 20. A bushing 35 mounted on the cover or bonnet, serves as a packing and guide for the valve-stem 20 intermediate of the length of the latter. 95

Upon the valve stem 20 there is adjustably mounted a stop, marked 37, to limit the opening movement of the main valve. This stop preferably has a hand-wheel 37 for ad-- justing it.

Attention is called to the fact that when the parts are in the position shown in Fig. 1, the stop 37 is in. contact with the upper end of the sleeve 26. This is the position of the parts when the valve is not in use and by reason thereof the main valve is positively fixed against being opened by pressure accidentally applied to its stem. In this position the parts are left when a boiler associated with the stop valve is cut out of line.

As a preliminary to the operation of the valve, the hand wheel 28 is turned to withdraw the sleeve 26 from its contact with the stop 37 and to place the spring under compression. This position of the parts is The stop 37 is next adjusted, if necessary, to determine the extent of opening movement of the main valve 14.' In practice, it is preferred to turn the hand wheel 28 until the spring has been compressed suliiciently to open the main valve automatically when the pressure in the main body of the valve and the steam connection is practically equal to that in the boiler.

The parts having thus been set and steam pressure being on the boiler and all closed, the hand wheel 31 is turned to open the auxiliary valve 17 and steam enters the chamber 16 and thence passes into the body r yes with the sleeve 26, or

ment of the main valve.

. valve instantly will close and V ment 2 1.

'a chamber 100, here shown of the valve and the steam connection. As soon as the pressure in the body of the valve and the steam connection reaches the point predetermined at which the main valve 14 shall be opened, said main valve will be automatically forced from its seat the distance determined by the stop 87 which, moving with said valve, will come in contact some other suitable part which may be provided to cooperate with said stop to restrict the opening move- During its movement, said main valve is guided by the engagemen't of the arms 2t and with the webs or flanges 22 of the frame 22.

In the event that rupture of the steam connection occurs, takes place whereby the flow of steam is suddenly increased the pressure of the steam on the back of the main valve will overcome the compression of the spring, and the main cut the boiler out of line.

A clamp collar marked 39 is fitted to a recess turned in the valve stem 20 above the guide PA, for suporting the weight of the main valve and stem when overhauling the same, and a perforated cap, marked 10-, is fitted to a threaded boss on the main valve for supporting the weight of the auxiliary valve 17 and its stem. under similar conditions.

If it is desired to convert this automatic safety stop valve into an ordinary screw stop valve, this may be done by adjusting a stop 41, which is shown as a nut or sleeve threaded upon the stem 20 between the abutments 24 and 25, until it bears When this has been done the sleeve 26 is locked betweenthe stops 37 and a1 and thereby fixed to the valve stem 20, whereby the latter may be raised or lowered by the hand wheel 28, the sleeve, stops 37 and ll and the valve stem moving as a unit.

If the spring 18 weakens, the abutment 25 may be adjusted nearer to its companion, 24L, to compensate for such weakness.

If preferred, a differential piston may be mounted on the valve stem 20, either to supplement the spring 18, as shown in Fig. 4 or as a substitute for said spring, as shown in Fig. 5. When this piston is employed the valve body is formed or provided with by extending the body outward beyond the plane of the outlet 12. T he pistonhere shown comprises an annulus 101 provided with radially-arranged arms 102 extending thereto from a bearing 103 which preferably is threadably engaged with the valve stem 20. This piston thus has openings through which the chamber 11 at one end of the piston has communication with the space or chamber at the other end thereof. A greater area of piston surface for the steam to act on in opening the valve or some other accident 26, nut 27, hand'wheel 28 and stop against the abutis provided by enlarging the diameter of the corresponding end thereof, as shown. Preferably, the piston is beveled toward said end to lighten its weight, as shown at 104. The outer circumferential wall of the annulus engages the inner wall of the piston chamber, packing rings 105 being preferably interposed between the two in order to make a steam-tight fit which will permit wear to be compensated for. 106 designates a relief )ort which, in practice, may be provide with a relief cock, not shown. A part of the steam initially admitted by the auxiliary valve 17 flows through the openings between the arms 102 and acting upon the up per end of the piston and againstthe beveled surfaces 10a tends to force the piston toward its valve-opening position. This tendency, however, is counteracted by the boiler pressure acting in the contrary direction on the main valve and also, to a comparatively slight extent, by the pressure within the chamber 11 acting against the lower face of the piston, until the latter pressures are overcome by the raising of the pressure within the chamber which it is intended the main open. 7

In event that the spring 18 is dispensed with, the yoke or frame can be made materially shorter than before,such a frame being shown in Fig. 5 and marked 122.

In the latter form of the device the sleeve ll, all of which are shown in Fig. 5 (as well as the abutment 25 which is not shown in said figure) also may be omitted, but it is considered preferable to employ the illustrated parts in order that the valve may be operated manually for testing purposes, this being done by adjusting the stop 11 into contact with the sleeve 26, as before described. It will be apparent that by means of the auxiliary valve the steam connections above it and also the chamber 11 may be drained as well as gradually warmed up. It will be seen that the herein exemplified embodiments of my invention are well calculated to cause a gradual heating of the steam connections and body of the stop valve, or the gradual equalization of the pressure between said body and the steam connection and the boiler, before said body and connections are subjected to full boiler pressure, and, moreover, affords provision for the preheating of the connections and valve body by valve shall the auxiliary connections, whether the main valve is operated auto- 11 to that at Y matica-lly or its operating means are ad-f justed for manual operation. It will also be seen that provision is made for locking the main valve against its being accidentally opened. Further, it will be seen that provision is made for varlably determining the extent of the automatic opening of the main valve: and that these several important features are embodied 1n a constructlon of simple, durable and practicable nature, whose (Lil parts are not liable to get out of order, may be readily assembled and relatively adjusted, and readily disassembled for cleaning purposes and for renewals. Again, it will be noted that while it has herein been stated that the auxiliary valve 17 is opened manually by turning the hand wheel 31, it is quite practicable to open it simultaneously with the adjustment of the stop 37 to determine the extent of opening of the main valve; for example, by setting the hand wheel 31 until the shoulder 51 on the sleeve 31 thereof is in the path of the stufiing-box casing 31, which moves with the hand wheel 3".

It 'will further be noted that when the primary supporting means for the valve stem 20, which primary means are composed 01" the elements by which the valve stem is held. against dropping through the casing or valve body when the parts are assembled, are removed, as they are in the overhauling of the valve, the valve stem unless otherwise supported would drop into the boiler or into the steam pipe, upon either of which it may be mounted in practice. The secondary supporting means composed of the stop 39 and the spider or support 34, in the exemplified embodiment, now becomes operative to support the valve stem, the latter dropping until its stop 39 rests upon the spider.

Again, it will be noted that the auxiliary valve is seated at the lowest part of the structure whereby thorough draining of the body, and the connections above said valve is provided for, and that the main valve is located t the lowest part of the body and outside of the latter and in position to enter the boiler or pipe from which the body receives its supply of steam, whereby no steam will enter any part of the body and said body is relieved of steam pressure when the valves are closed. Further, it will be noted that the auxiliary valve may be moved from or to its seat wholly independently of the main valve and hence may be opened and closed at any position of the latter, or may be set to close with the maiii valve.

Having now described the invention What I believe to benew and desire to secure by Letters Patent. is

1. Means for controlling communication between a source of steam supply and a steam connection, the said means comprising a main valve and an auxiliary valve, each having a stem, said valves severally controlling such co-nnnunication, the auxiliary '-.alve having means independent of the main valve stem whereby it is manually operated and being movable with and relatively to the main valve and adapted when fully open to admit steam to the connection in volume such as to cause a gradual increase in the temperature of and pressure within the latter, the main valve being arranged to be held to its seat until a predetermined pressure has been reached in the connection and adapted when fully opened to admit steam under full pressure to said connection and means having connection with the stem of the main valve and operable to open the same.

2. Means for controlling communication between a source of steam supply and a steam connection, the said a body having an inlet to the source of steam-supply and an outlet to the connection, a main valve and an auxiliary valve each having a! stem, said valves severally controlling communication between the inlet and the outlet, the auxiliary valve being movable with and relatively to the main valve and having means independent of the main valve stem whereby it is manually moved from its seat and being adapted when fully open to admit steam to the outlet in a quantity such that the temperature of and pressure within the connection will be gradually raised, the main valve being subject to and held to its seat by the pressure of steam at the inlet side of the body until a predetermined pressure has been reached in the connection and adapted when fully opened to admit steam under full pressure to said connection, and means having connection with the stem of the main valve for automatically opening said valve when said predetermined pressure is reached.

8. Means for controlling communication between a source of steam supply and a steam connection, a body having an inlet to the source of steam-supply and an outlet to the connection, a main valve severally controlling communication between the inlet and the outlet, the auxiliary valve being movable with and relatively to the main valve and having means whereby it is manually moved from its seat and being adapted when fully open to admit steam to the outlet in quantity such that the temperature of and pressure within the connection will be gradually raised, the main valve being subject to and held to its seat by the pressure of steam at the inlet side of the body until a predetermined pressure has been reached in the connection and adapted when fully opened to admit steam under full pressure to said connection, and means cooperating with the pressure at the outlet side of the body for automatically opening the main valve when the two pressures have reached a predetermined relation.

4. Means for controlling communication between a source of supply and a connection, the said means comprising a main means comprising the said means comprising and an auxiliary valve.

- predetermined valve, and an auxiliary valve and their seats, severally controlling such communication, the seats of the valves having different areas, the port of the main valve-seat being of larger area than the auxiliary valveseat, the auxiliary valve being movable with and relatively to the main valve and having means whereby it is manually operable and means for automatically opening the main valve when the pressure in the source of supply and connection have reached a predetermined relation.

5. A stop valve comprising a body having a steam inlet and a steam outlet, a main valve for controlling the How of steam from the inlet to the outlet, means operable to open the main valve automatically when a pressure on the outlet side of said body has been obtained, and an auxiliary means including a valve arranged to be seated upon the main valve and movable relatively thereto adapted to permit this predetermined pressure to be gradually obtained.

6. A valve comprising a body having an inlet, an outlet and an intermediate chamher, a main valve for controlling the flow of fluid, under pressure, from the inlet to the outlet, said valvebeing arranged to open in a direction opposed to that of the tlow of the fluid, means for adjustably regulating the amount of its opening, means operable to open the valve automatically when a predetermined pressure on the outlet side of the body has been obtained, and an auxiliary means adapted to permit this predetermined pressure to be gradually obtained, said auxiliary means comprising a passage leading to the intermediate chamber and a. manually operable valve for controlling said passage.

7. A valve comprising a body having an inlet and an outlet, a main valve for controlling the fiow of fluid, under pressure, from the inlet to the outlet, said valve being arranged to open in a direction opposed to that of the flow of the fluid, means for adjustably regulating the amount of its opening, a spring connected with the said valve and adapted to open the same when a predetermined pressure has been obtained on the outlet side of said body, and means whereby such predetermined pressure is obtained gradually.

8. A valve comprising a body having an inlet, an outlet and an intermediate chamher, a main valve for controlling the flow of fluid, under pressure, from the inlet to the outlet, said valve being arranged to open in a direction opposed to that of the flow of the fiuid, means for adiustably regulating the amount of its opening, a spring connected with the said valve and adapted to open the same when a predetermined pressure has been obtained on the outlet side of said body, and means whereby such predeterpiston having an opening mined pressure is obtained gradually, comprising an auxiliary channel leading to the intermediate chamber and provided with a manually-operable valve for controlling it.

9. A valve, comprising a body having an inlet and an outlet, a main valve for controlling the flow of fluid under pressure from the inlet to the outlet, a differential piston and a spring connected with the said valve and adapted to open the. same when a predetermined pressure has been obtained on the outlet side of said body, and means whereby such predetermined pressure is obtained, gradually.

10. A valve comprising a body having a chamber, an inlet and an outlet, a main valve controlling the how of fluid, under pressure, from the inlet to the outlet, a dift'erential piston having connection with said valve and mounted. in said chamber, said for the passage of fluid, under pressure, from one of its sides to the other, and being adapted to open said valve when a predetermined pressure has been obtained on the outlet side of said body, and means whereby such predetermined pressure is obtained, gradually.

11. A. valve comprising a body having a chamber, an outlet in open communication with said chamber and an inlet, a main valve and an auxiliary valve and their seats, interposed between the chamber and the inlet and severally controlling the admission of fluid, under pressure, to the former, the auxiliary valve being movable with and relatively to the main valve, the port in the seat for the auxiliary valve being of less area than the main-valve seat port, means for opening the auxiliary valve manually without aii'ecting the main valve and means whereby the main valve is opened automatically when the pressure in the chamber reaches one having a predetermined relation to that at the inlet side of the main valve.

12. A valve comprising a body having a chamber, an outlet in open communication with said chamber and an inlet, a main valve and an auxiliary valve and their seats, interposed between the chamber and the inlet and severally controlling-theadmission of fluid, under pressure, to the former, the auxiliary valve being movable with and relatively to the main valve, the port in the seat for the auxiliary valve being of less area than the main valve-seat'port, means for opening the auxiliary valve manually without affecting a spring the mam valve and operatively connected with the' main valve and serving to open the same automatically when the pressure in the chamber reaches one having a predetermined relation to the pressure at the inlet side of the main valve.

13. A valve comprising a body having a chamber, an outlet in open communica tion with said chamber and an inlet, a main said valve having valve and an auxiliary valve and their seats, interposed between the chamber and the inlet and severally controlling the admission of fluid, under pressure, to the former, the port in the seat for the auxiliary valve being of less area than the port in the main valve-seat, means for opening the auxiliary valve manually without affecting the main valve, a differential piston mounted in the chamber and a spring, said piston and spring being operatively connected to the main valve and serving to open the same automatically when the pressure in the chamber reaches one having a predetermined relation to the pressure at the inlet side of the main valve.

H. A stop valve having a body provided with a steam chamber, a steam outlet in open communication with said chamber and a steam inlet, a main valve interposed between the steam chamber and the inlet, a hollow stem with a lat eral outlet port o iening into the steam chamber and an inlet port toward the source of supply of steam, an auxiliary valve having its seat adjacent to said inlet port, means independent of the main valve stem for manually opening the auxiliary valve to admit steam to the interior of the steam chamber for preheating the body and the connections connected to the outlet, and means for opening the main valve when a predetermined pressure has been attained in said connection.

15. A valve comprising a body having a chamber, an outlet in open communication with said chamber and an inlet, a main valve interposed between the chamber and the inlet, said valve having a hollow-stem with; a lateral outlet port opening into the chamber and also having an inlet port, an auxiliary valve having its seat adjacent to the mlet port in the main valve, means for manually opening the auxiliary valve to admit fluid, under pressure, to the interior of the chamber and means for automatically opening the main valve when a predetermined pressure has been obtained in said chamber.

16. A valve.

comprising a bodv, a reciprocatory valve, its stein, a pair of abutments, one of said abutments being fixed on the stem and the other slidably mounted on the stem, means connected with the slidable abutment for preventing rotative movement of the same on the stem, means con nected with the fixed abutment for pre venting rotative movement of the stem, a spring mounted between the abutments and tending to move the valve and stem in one direction, and means for moving the valve and stem in opposition to the spring, the latter means comprising a sleeve'connected to the slidable abutment, a nut threaded upon the sleeve and held against longitudi- .through which the fluid nal movement and an adjusting device for the nut.

17. A valve, comprising a body, a reciprocatory valve, its stem, a frame having abearing, a spring tending to open the valve, an abutment for the spring, having a sleeve slidably engaged with the stem and a part engaged with the frame, the interengaging parts of the abutment and frame be- 111g adapted to prevent rotative movement of the former, a nut mounted in said bearing and threaded upon said sleeve, an adjusting device for the nut, said nut being held against longitudinal movement, and a second abutment for the spring fixedly secured to the stem and provided with a part which engages the frame and is held against rotative movement thereby.

18. A "alve, comprising a body having an inlet and an outlet, a valve for controlling the inlet, means operative to open said valve automatically when a predetermined pressure has been obtained. in the body, auxiliary means arranged to permit this predetermined pressure to be obtained, and adjustable means for variably regulating the extent of the opening movement of said valve, comprising a stop adjustably mount+ ed on the stem of the valve and means adjustable to engage said stop to prevent accidental opening of the valve.

19. A valve, comprising a body having an inlet for the admission offiuid under pressure and also having an outlet for the fluid, a valve for controlling the inlet, a bypass of area less. than the area of the inlet may enter from the source of supply to the outlet side of the valve, a spring cooperating with the'pressure of the fluid in the body to open the valve automatically when the latter pres-- sure has attained predetermined relation to that of the source of supply, abutments for the spring, one of said abutments being connected with the valve, a sleeve connected with the other abutment, and means for adjusting the sleeve to put stress on the spring.

20. A valve, comprising a body having an inlet and an outlet, a valve for controlling the inlet, a valve stem, a spring, abutments for the spring, one of said abutments being connected with the valve stem and the other adjustably mounted with relation thereto and having a sleeve, and a stop on the valve stem adapted to be engaged by the sleeve, said sleeve being adjustable to a place where it cooperates with said stop to prevent any seat and from said place to put stress the spring, and said relatively to the stem 21, A valve, comprising a body having an inlet and an outlet, a valve subjected to fluid pressure tending to hold it to its seat,

on stop being adjustable and sleeve.

movement of the valve from its admit fluid, under pressure,

means operative to between a source of supply of fluid, under pressure, and a connection, the said means comprising a'valve having an inlet for connection with said source of supply and an outlet to the connection, a main valve for controlling the inlet, means controllable to to the outlet side of the main valve in volume adapted to raise the pressure in the body of the stop valve gradually and means for opening the main valve automatically when the pressure in the body of the valve has attained a predetermined relation to that in the source of V supply, the latter means comprising a spring having connection with the main valve, and means adjustable to put variable stress on said spring.

23. Means for between a source of supply pressure, and a connection,

controlling communication of fluid, under the sa1d means comprising a valve having an inlet for connection with said source of supply and an outlet to the connection, a main valve for controlling the inlet, means controllable to admit fluid, under pressure, to the outlet side of the main valve in volume adapted to raise the pressure in the body of the valve gradually and means for opening the main valve automatically when the pressure in the body of the valve has attained a predetermined relation to that in the source of supply, the latter means comprising a spring having connection with the main valve, means adjustable to put variable stress on said spring, and a stop movable with the main valve, said stop and means being so correlated that they are adapted coopera tively to prevent movement of the main valve from its seatwhen relatively adjusted to a certain position.

24. A valve comprising a body having an inlet and an outlet, a valve, means operative to open said valve automatically when a predetermined pressure has been obtained in the outlet, means through which said pressure can be obtained, and adjustable means for rendering the automatic means inoperative or operative, at will without interfering with the operation of the main valve.

25. A valve comprising a body having an inlet and an. outlet, a valve, means operated to open said valve automatically when a predetermined pressure has been obtained in the body, means through which said pressure can be obtained, adjustable means for rendering the automatic means inoperative and a manually operable means for adjusting the valve when the automatic means are inoperative.

26. A valve, comprising a body, having an inlet and an outlet, a valve, its stem, means operative to open said valve automatically when a predetermined pressure has been obtained in the body, means through which said pressure can be obtained, a hand wheel, a sleeve slidably mounted on the valve stem, means whereby the hand wheel is prevented from moving longitudinally and has threaded engagement with the sleeve, lock the sleeve to and release it from said stem.

27. A valve, comprising a body having an inlet and an outlet, a valve, its stem, a spring operative to open said valve automatically when a predetermined pressure has been obtained in the body, means through which said pressure can be obtained, a hand wheel, a sleeve slidably mounted on the valve-stem and having means whereby it puts stress on the spring, means whereby the hand wheel is prevented from moving longitudinally and has threaded engagement with the sleeve for adjusting the latter, and means adapted to lock the sleeve to and release it from said stem.

28. A. valve comprising a body having an inlet and an outlet, a valve, its stem, means connected with said stem .for opening the valve automatically when a predetermined pressure has been obtained in the body, means through which said pressure can be obtained, a hand wheel, a sleeve slidably mounted on the valve-stem, a stop mounted on the stem at one end otthe sleeve, a stop adjustably mounted on the stem at the other end of the sleeve, said stops being adapted to clamp the sleeve between them, and means whereby the hand wheel is prevented from moving longitudinally and has threaded engagement with the sleeve.

29. A valve, comprising a body having an inlet and an outlet, a main valve, means operable to open the main valve automatically when a predetermined pressure in said body has been obtained, an auxiliary valve adapted to permit this pressure to be obtained gradually, adjustable means for determining the extent of opening movement of the main valve and means whereby the auxiliary valve is opened by adjustment of saidadjustable means.

30. A stop valve, comprising a body having a steam inlet and a steam outlet, main and auxiliary valves, the main valv having a port which opens directly into the body near the steam inlet and through which steam is admitted in quantity adapted to heat the body and steam connection gradually, and the auxiliary valve being seated in the main valve and controlling said port, said main valve having a hollow stem and and means adapted to I closing said inlet,

the auxiliary valve being provided with a stem extending through the stem of the main valve and means applied to each stem for operating the valves independently of each other.

31. A stop valve, comprising a body having a steam inlet and a steam outlet, main and auxiliary valves, the main valve having a port which opens directly into the body near the steam inlet and through which steam is admitted in quantity adapted to heat the body and steam connection gradually, and the auxiliary valve being seated in the main valve and controlling said port, said main valve having a hollow stem and the auxiliary valve being provided with a stem extending through the stem of the main valve, a hand wheel mounted on the stem of the auxiliary valve outside the stem of the main valve and means applied to the stem of the main valve whereby the same may be opened manually.

32. A stop valve, comprising a body having a steam inlet and a steam outlet, main and auxiliary valves, the main valve having a port which is in communication with the steam outlet and through which steam is admitted in quantity adapted to heat the body and steam connection gradually, and the auxiliary valve being seated in the main valve and controlling said port, said main 'va-lve having a hollow stem and the auxiliary valve being provided with a stem extending through the stem of the main valve, a hand wheel mounted on the stem of the auxiliary valve outside the stem of the main valve and means whereby the main valve is opened automatically when a predetermined pressure of steam has been obtained in the body.

33. A stop steam valve comprising a body having a steam inlet at its lowest part and also having a steam outlet, a main valve for said main valve being provided with an inlet port which is in open communication with the steam outlet when said port is uncovered, and an auxiliary valve for said port, the auxiliary valve being movable relatively to. the mam valve, whereby the body is thoroughly drained and steam in comparatively small volume is admitted to the outlet when the auxiliary valve is opened.

Copies of this patent may be obtained for five cents each, by addressing the 34. A stop valve comprising a body having a steam inlet at its lowest part and also having a steam outlet, a main valve for closing said inlet, said main valve being provided with an inlet port which is in open communication with the steam outlet when said port is uncovered, and an auxiliary valve for said port, the auxiliary valve being movable relatively to the main valve, whereby the body is thoroughly drained, and steam in comparatively small volume is admitted to the outlet when the auxiliary Valve is opened and means for automatically opening the main valve when the pressure of steam admitted through the port in the main valve attains a predetermined relationship with that On the outer side of the main valve.

85. In combination with a steam boiler, a stop valve comprising a body mounted on said boiler and having an inlet port, a downwardly-opening valve for controlling said port, located outside said body in position to enter the boiler, an auxiliary inlet port, an auxiliary valve for closing the latter port, means for manually operating the auxiliary valve, the valve body also having a steam outlet and a passage through which the auxiliary and communication with its said outlet, and means whereby the main valve is automatically opened and closed under control of pradetermined variations in pressures in the 36. A valve comprising a body having an inlet and an outlet, a main valve for con trolling the flow of fluid under pressure from the inlet to the outlet, means operable to open the main valve automatically when a predetermined pressure on the outlet side of the body has been obtained, and an auxiliary means including a valve arranged to be seated upon the main valve and movable relatively thereto adapted to permit this predetermined pressure to be gradually obtained.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN Q. WALTON. Witnesses:

C. J. STOCKMAN, A. STOCKMAN.

Commissioner of Patents,

Washington, D. 0.

main inlet ports have

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