US1511009A - Flushing valve - Google Patents

Description

Patented Oct. 7, 1924.

umrizn STATES aaranr eities.

HOWARD A. srnaa, or snanver rnnn, massacuusgr rs, ssrgnon onoN -HALF '10 JOHN s gacy, or sgamqi nihn, 'ii ljnssacau'sn r iisi rnusnrnevALvn Application fil ed August 4, Serial. Ho 655,686.

To all who-m it may concern:

Be it known that I, HOWARD A. SPEAK, a citizen of the United States of America, and a resident of Springfield, in the. county of Hampden and State of Massachusetts, have invented a new and useful Flushing Valve, ()f'WlllCll the following is a specification.

My invention relates to improvements in tlushometers,and consists generally ofabocly having therein inlet, outlet, pressure, and relief chambers, said relief chamber communicating with said outlet chamber, a main valve between said inlet and outlet chambers. movable compression means between said outlet and pressure chambers, the same being connected with said valve, a downwardly-opening, spring-pressed relief valve between said pressure and relief chambers, a tubular member extending downwardly from the floor of said relief chamber. through said pressure chamber and the parts and members below the same, into said inlet chamber, a valve-stem extending downwardly from said relief valve and carrying at the lower end. in said tubular member, a dash-pot which ser'vesas a retarding valve, said (lash pot comprising a member which has an interior passage. with a gravity ballvalve to close said passage at the top, means (it communication between opposite ends of said dash-pot outside of said passage therein, and mechanical means for opening s'aidrelief valve. together with such other parts and members as may be necessary or desirable in order to render the flushometer or flushing. valve complete and serviceable in every respect. all as hereinafter set forth.

The primary object of my invention is to produce a flushing valve that is simple in construction and operation and positive in action. consists of few parts which are not liable to get out of order or become inefficient or ineffectual. is ,-omparativel v inexpensive in construction. and strong and durable. and \vhercwith are obtained a quick d scharge and a slow closing movement involving a predetermined time interval, the action of the valve being automatic throughout the opening and closing operations. after the initial impetus is given through the medium of a cam. plunger, or other more or less similar device.

Another object is to produce a flushing valve which is non-leakable, free from watershammelz, and withal: highly practicable. and eficient.

Many flushing: valves heretofore constructed have been of such a complicated nature orcharacter and. consisted of such a large number ofipartsasto render the same ulisatisi'actony. and impracticable in many respects, and one of-"themost; important ad vantagesof the present: flushing; valve residesiin its. simplignty. of construction.

A further object is. toafl'brdmeans for obtaining ready accessto the partsandmemhers vcontained. within the body of the Hushing. valve to the end that adjustments, repairs, and replacements. ofsu cl parts and members, should any. be required, can be made easily and. quickly, and. this without impairing the eflici ency, of said. valve after the same-has been restored to its former whole and. complete condition.

Other objects and advantages will appear in the course, of the following; description.

If attain the. objectsfand secure the advantages of my invention by the means illus trated in the accompanying, drawings, in which 1. is a centra vertical section through a flushing valve which embodies a practicalform of. my invention, the movable parts eingdisnosed in closed or otherwise normal or, initial positions; Fig. 2, a lefthand end elevation ofthe operating membe'rs, shown inthe. preceding, view, for the relief. valve; Fig. 3, a central, vertical section through the upper portion of aflushing valve which is: equipped with a plunger,

instead of rocker members and a.ca;m, for

operating or opening the relief valve, and.

Fig. 4:. a cross sectionthrough'the central,

tubular member. and valve-stem therein looking down onto the dash-pot or retarding-valve.

Similar reference characters designate similar parts throughout the, several views.

The lowerv m of the body and the main valve elementsof: this flushometer are generally similar in construction tof what iscommonly known as the Jenkins valve.

' As shown in the drawings, the valve body comprises a casing 1, and a hollow cap or dome 2. secured to said casing by means of a'nut 3.. A horizontal member; or plate 4- is mounted on the upper edge ofv the casing lbeneath the lower "edge oi the dome 2, such plate having. on the under. si e thereofan annular flange 5 to engage the inside of said casing adjacent to said upper edge of the same for the purpose of centering said plate. A packing-ring 6 is interposed between the upper edge of the casing 1 and the adjacent edge portion of the plate 4, and a packiug-ring T is interposed between such edge portion of said plate and the bottom edge of the dome 2. The dome 2 is provided at the bottom with an outwardlyextending, annular flange 8 which is engaged by the nut 3 when said nut is screwed down onto the upper portion of the casing 1, such portion being externally screwthreaded to receive said nut. A tight joint is thus formed between the casing and the cap, and means afforded for readily disconnecting and removing said dome from said casing, and restoring and securing in place again said dome.

The casing 1 is designed to be connected with the usual supply and discharge pipes of an ordinary water-supply system, and said casing has therein an inlet chamber 9 and an outlet chamber 10. The chambers 9 and 10 are separated by means of a partition 11 which is provided with a horizontal valve-seat 12. There is a brass-lined pressure chamber 13 in the casing 1 below the dome 2, and a relief chamber 14 in said dome. The plate 4 forms the top of the pressure chamber 13 and the bottom of the relief chamber 14.

A by-pass or passageway between the relief chamber 14 and the outlet chamber 10 is formed by an opening 15 in the plate 4 and a passage 16 in the casing 1 above said outlet chamber, which opening and passage are in alignment, such passageway necessarily extending through the packing-rings 7 and (i. in order to facilitate the alignment of the opening 15 with the passage 16, when the parts are assembled, the flange 5 may be provided with a downwardly-extending pin 17 which extends from the flange 8 through openings in the packing-ring 7. plate 4, and packing-ring (i into a passage in the casing 1 below. The arrangement is such that the plate 4, when positioned on the casing 1 by the pin 17, is located with the opening 15 directly above the passage 16. The pin 17, Furthermore, insures the location of the dome :2 in a predetermined manner such as necessary in order properly to position the relief-valve, operating members presently to lie described.

A, tube 18 depends from the plate t and is rigidly secured thereto. The bottom of the tube 18. which is located in the inlet chamer 9 near the bottom of the casing 1, is ilUQPCl by means of a screw-cap 19. In the mini center of the plate 4 is a valve-seat 1'1), the axis of said valve-seat being in line ith the axis of the valve-seat 12.. and a line connecting the axial centers of said valve-seats coincides with the axis of the tube 18. This tube has one or more openings 21 therein a short distance below the plate 4. Communication between the tube 18 and the compression chamber 13 is established through the openings 21. In one side of the tube 18 is a vertical passage or flattened part 22, such part extending from the horizontal plane of the openings 21 downwardly to the bottom of said tube. The passage or that tened part 22 might be omitted in the event the main-valve parts and members hereinafter described have a fairly loose fit on the tube 18.

Within the tube 18 is a valve-stem 23 which extends upwardly through the valveseat 20, and is provided with a downwardlyopening, relief valve 24 for said valve-seat. At the top of the valve-stein 23 is a head 25. A spiral-spring 26 encircles the valvestem 23 above the valve 24 and between the plate 4 and the head 25, and normally causes said valve-stem to be disposed in its high position with said valve in closed position. A retarding piston 27 is connected with the base of the valve-stem 23 by any suitable means, such as a pair of obliquelyarranged and downwardly-extending arms 28. There is an axial passage 29 through the piston 27, which passage flares at the top to form a seat 30 for a ball-valve 31. The arms 28 are spread sufficiently wide apart at their bases to permit the ball 31 to be raised from its seat. There is in one side of the piston 27 a vertical passage or flattened part, as represented at 32 in Fig. 4, although such passage or flattened part might be omitted in the event said piston have a fairly loose fit in the tube 18. The ball-valve is normally held on the seat 30 by gravity.

Slidingly arranged on the tube 15 is a hollow member 33 which serves as a valvestem for a valve This is the main valve for closing the valve-seat 12. The valvestem 33 below the valve 34 is tapped into a valve member 35. A sleeve 36, having a top flange 37 and a bottom flange 38, is mounted on the valve-stem 33. The valvestem 33 has a top flange 39 between which and the flange 37 is a leather washer or cuppacking 40 that tightly fits the walls of the compression chamber 13 in which latter these members move up and down. The flanges 37 and 39 and the cup-packing 40 form a piston-head and the bottom of the chamber 13. The valve 34 is clamped between the flange 38 and the valve member 35, and when in closed position bears on the top of the valve-seat 12, while the upper portion of said valve member at such time fills the opening through said valve-seat. The lower portion of the valve member 35 is frusto-conical in shape, and there is a plurality of grooves 41 in and lengthwise of the luu periphery thereof, consed ipntly;.wlien the valve 34 and said member areele'vated so that. said. irusto conicah, grooved part of The water in the. chambe rises throughthe passage .22, into, the pressure chamber 13, passes thrbugflathe pen i gsQl into the tube L8 above t'e, tarding piston 27, and through the passage 32 111 said piston into the bottom ofsaid. tuber Thustlie chamber 13. and the tube 18 are filledwith-wateig but. no water canenter. the relief chamber 14 while the valve 24: is olosed The area of the pistonshead being greater than hat o the valve member 3.5,,the pressure aboyesaid piston-head, causes the; main, valve, 34 to be retained in closed. position .7 on the valve-seat 12, and, without reliewing, such. pressure. said valve can not be opened. p, i

As one means, for opening the relief valve 24, I provide.- a cam 42, a roolr shaft 43, and an operating lever or arm The rockshatt 43.is journaled in a suitable bearing in one side oi the dome2, .andth cam 42 and the arm 44 are secured respectively to the inner and outer, endsof said, rock-shaft, the latter being a horizontal:member, The rock-shaft 43, is ,held a nstiendwise movement by meansofg-a colTZnABsecured to said rock-shaft outside oi the bearing 45, and a pin4Z projecting from. saldrock-shaft inside of said bearing. A horizontal stop pin 48 extends inwardly. irom the bear ng t5 into the pathoi. the p-in4ZZ, and limitsthe movement; of, the rook-shaft 433m one direction. The rpoleshaft43 os io s. he am 42 directly aboveithe valve-stem head 25, and a spiral-spring 49 is arrangqd to retain said cam tlirou htlle. medium. saidrock' shaft, with the. owpart Q? the cam out of contact with or remote from the head 25. The spiral-spring 49 encircles the rock-shaft 4;, and hasone end, securedto the pin 48 and) the otherend secured to said rock-shaft, and said spring normallyretainsthe pin 47 in contact withthe pin48, which pin, 48 is then behind the pin 47, with.the cam 42 in the position relative to. the head45 that has just beenexplained. Whentheseparts and members are thus disposed. the arm 44 extends upwardly and forwardly tronr the rock-shaft 43.

Upon swinging the arm 44 downwardly, the rock-shaft- 43 is actuated, against the resiliency of thespring49, ,and' in, the direction to carrythepin 47. away from the pin 48 and the cam 42., into. engagement with the head 25.. ,As the arm 44" continues in its downward movement the part of the cam 42, rides, on to the headf'25. and forces said head with the valve-stem 23 downwardlly, against the resiliency ofthe s'pring 2G; .h valve-stem 23 carries downwardly with it the relief valve 24 and the retarding valve 27, thus opening the way from the tube 18, and from the chamber 13 through-the openings in said tube, through the-valveseat 20, into the chamber 14. Tlie ball val've 31 does not materially interfere with the downward movement of the retarding piston 27 through the water in the tube 18, because saidjball-valve is unseated by the-sudden plunge of said piston so that the passage 29 is open at the upper as well as the lower end. The upward movement, however, of the pis ton 27 is retarded, because then the ball valve 81 is firmly seated. Upon the release of the arm 44, the spring 49 immediately uctua tes the rock-shaft 43 in reverse direction until the pin 47 contacts with and is stopped by the pin 48, and the cam 42 is carried away from the head 25 and into a position above the limit of the upward trave of said head.

' Space is left between the head, 25' and'the cam 42, when said cam is in normal or initial position. in order that the complete closin; of the relief valve 24, under the influence of the spring 26, shall not be interfered with by said cam.

The dome 2 is arran ed in a manner to have the arm 44 disposed in a predetermined position, usually in a forwardly-extending direction, and the pin 17 in fixing the position of said dome when turned about its axis, is an important factor in determining the position of said arm and the other rocker members, and insuring that they always be properly located.

The operation of this flushing valve, assuming that the parts and members are disposed as illustrated in Figs. 1 and 2, is as follows:

The handle of the arm 44 is grasped and said arm is swung downwardly to open the relief valve 24, against the resiliency of the springs 49 and 26, and through the medi um otthe rock-shaft 43 and the cam 42. The arm 44 is released and the spring 49 restores the rocking members to their initial positions again. The downward movement imparted to the head 25 by the cam 42 is also imparted to the valve-stem 23', and the valve, 24 and piston 27. In moving downwardlv, the valve 24 opens the valve-seat 20, and waterescapes through said valve-seat into the chamber 14. The retarding piston 27 descends so quickly that it momentarily passes away from the ball-valve 31, the passage 29 being of sufficient size to enable said retarding valve to make the quick descent through the water in the tube 18 and leave said ballvalve behind. The ball-valve quickly descends, however, after the descent of the piston 27', and closes the passage 29 at the upper end. Now the piston 27 can ascend,

under the influence of the spring 26, only so fast as displacement of the water, with which the tube 18 is always filled, can be effected through the narrow passage The compression chamber 13 is full of water which has entered the same from the inlet chamber 9 through the narrow passage and the tube 18 is also full of Water which has eutered through the openii'igs 21. therein, as previously stated, and the water from said tube and said COIHPYQSSlOH chamber ininiedi ately passes through the valve-scat 20 into the chamber 14. from which latter the water escapes through the passageway 46) into the outlet chamber 10. The ater at this time passes from the chamber 1?) through the openings 21 into the tube 18 and through the valve-seat into the chamber 14. As soon as the cam 43 releases the head to the spring 26, the latter forces the valve-stem 23 and valves carried thereby upwardly, but only so fast the water in the tube 18 can be displaced through the narrow passage 82, as previously observed. and the relief valve 24 is eventually caused to close the valve-seat 30. The balLvalve 81, is moved upwardly by and with the piston 27, so that the upper end of the passage 29 is closed securely throughout the ascent of said piston. Previous to the closing of the valve 24, and while the water is escaping from the chamber 13 into the chamber 14. the pressure of the water below the valv. member causes said member. the valve 34, and the valve-stem 33, with the other parts and members carried thereby, to be raised a suflicient distance to open the way through the valve-seat 12, and permit the water to pass from the chamber 9 through said valve seat into the chamber 10. The flow of water from the inlet to the outlet chambers continues until the pressure of the water in the chamber 13 is sufficient to force downwardly the piston-head in said last-named chamber and cause the valve 34 to close the valve-seat 12, when the flow of water from said inlet, chamber to said outlet chamber is cut off. The grooves 41 in the valve member 35 facilitate both the opening and closing operations of the main valve. The water pressure begins to increase in the chamber 13, to bring about the closing of the valv 34, soon as the valve 24 is closed, and continues to increase until the balance oi pressure changes from the chamber 9 to the chamber 13. The way for the water to pass from the chamber 9 to the chamber 13 is always open through the narrow passage 22.

lVater enters the chamber 9 under pressure as usual, and the results described above are due to the fact that a certain amount of water entering said chamber rises through the passage 22 into the chamber 13 until the latter is filled and has a pressure therein equal to the pressure in the chamber 9, and

to the further fact that the chamber 13 is much larger in diameter than the opening through the valve-seat 12, or the area of the piston-head in the chamber 13 is greater than that of the main valve 34, so that said valve is closed by the time the pressure in the chambers 9 and 13 becomes equal, and seated with a force proportionate to the difference in such area, as is well understood. It naturally follows that the opening of the ieliet' valve 24 enables the pressure in the chamber 13 to be reduced, with the result that the greater pressure of the water in the chamber 9 causes the valve 34 to be opened. As soon as the relief valve is closed, however, the water pressure in the chamber 13; begins to increase, by reason of the en trance into said chamber of the water through the passage 22, and continues to increase until the force of the water above the piston-head in said chamber is greater than that below the valve 34, When the latter is caused to descend onto its seat, as previously explained.

in lieu of t e roch-slni't't and cam for opcrating the relief valve 24, a. spring-pressed phonrjer. in Fig. 5, may be employed. The plunger 50 is a vertical member slid ingly arranged in the axial center of the dome directly over the valve-stem head 25, and normally retained out of contact with said head by means of a spiral-spring 5! which is interposed between the plate 4 and a flange 52 carried by said plunger. The flange 52 is located on the plunger 50 in position to contact with the bottom of a bos or bearing 53 through which the pluner 30 extends and in which it operates, said bearing being an integral part of the dome 2. The flange 52 limits the upward movement of the plunger 50 under the influence of the spring 51, and retains said plung at the required distance above the head m. The plunger 50 may be provided on top above the dome 2 with a head 54.

in practice, the hand or footis applied to the head 51 and the plun gger 50 is forced downwardly against the resiliency of the spring 51 and into contact with the head 25, the di'iwnward movement of the p lun ger being sutl'icient to force downwardly said head and the valve-stem 23 far enough to open the relief valve 24. As soon as the plunger 50 is released, the spring 51 actu- .tc. the same upwardly until the flange 52 comes into contact with the boss 53. Otherwise the second flushing valve functions in a manner similar to that of the first.

The plunger 50 is normally retained out of contact with the valve-stem head with which said plunger is associated for the same reason that. the cam 42 is normally retained out of contact with the valve-stem head with which said cam is associated.

More or less change in the shape, size,

construction, and arrangement of some or all of the pa rtsof this flushometer, in addition to those hereinbefore specifically pointed out or referred'to, may beunade,

Without departingfrom .the spirit of my inventionorexceeding the scope of what .is claimed.

'VVhat I claim as my invention. and desire tog-secure by Letters Patent, is-

1.'In-a flushing valve. a. hollow body having 'therein inlet, outlet, pressure, and reliefchambers a valve-seat between said inlet and'outlet chambers, a valve for such seat, a 'piston head in said pressure cham her. a valve-stem member connecting said valve and piston-head, 1 a valve-seat between "said pressure "and relief chambers, a down- '-.\vardly-opening valve for said last-named valve seat, a tube below said last-named val've seat =-a nll extending through said piston-head, said t'ube being closed at the bot tom and'openi'ng into said pressure chamber. but there an topen passage be- 'tween said inlet and pressure chambers. a stem in said tube for said second-named valve, a perforated piston carried by'said stem in saitl tube;- a spring arranged normally t'o force sai'd stem i and its valve and istonu wa1fily, means noimally to close the perforation in said perforated piston, the construction providing for a'oonstantly open gpas'salge between both ends of said per- =forate'd iston.-and means'to open said second -name d valve against the force of said spring.

' '2. In 'a-flilshing valve,a hollow body havinp therein inlet, outlet, pressure, and relief'c'hambersa valve-seatbetween said inlet and outlet chambers, a valve forsuch seat,. a piston head in saitl pressure chamber, a vailve-stem member connecting said valve and :pistonhead, a valve-seat between said ressure and relief chambers, a down- Ward y opening valve for said lastmamed 'valve s'eat, a tube below said last nained valve-seat and extending through said piston-head-said tube being closed at the 'bottom andppening into said pressure chamher, but there being an open passage between said inlet and pressure chambers. a stem in said tube for said second-named valve, a perforated piston carried by said stem in said tiibe, a spring arranged non mally to force said stem and its valve and piston upwardly, means normally to close 'the {perforation in said perforated piston, "the construction providin for a constantly 'open 'pa ssagebetween both ends of said per terated piston, and 'spring actnated means "to open' said se'eond named valve against 'the'f'foreeits 'spring.

?3. In: a flus'liing valve, :a hollow body havtherein 'inletp'oiitlt, "pressure, and relief chambers, a valveseat between said inlet "and outlet hambers a valve for suchseat,

a piston-head in said pressure chamber. a valve-stem member connecting said valve and pistonheai'l, a valve-seat between said pressure and relief chambers, a down" wardly'opening valve for said last-named valve-seat. a tube below said histamine-ll valve seat and extending through said pistonhead. said tube being closed at the bot tom and opening into said pressure chainber, but there beii'ig an open pass between saidinlet and pressure chambers, a stem in said tube for said second-named valve, :1 per'torateiil piston carried by said stem in said tube. a spring arranged normally to force said stem and its valve and piston upwardly. means normally to close the pertorationiu said perforated piston. the construction providing for a constantly open passage between both ends of said .perforated piston, means to act on said valve stem to open said seconde'named valve against the force of said spring, and a spring arranged normally to retain said last-named means out ofcontact with said valiestem.

'ton-head,said tube being closed at the bot tom and opening into saidpressure chamber. but there being an open passage between said inlet and pressure chambers, a stem for said second-named valve extending above thesame into said reliet chamber an below the same into-said tube, a perforated piston carried by said stem in said tube. a spring arranged normally" to force said stein and its valve and piston upwardly. means normally to close the perforation in said perforated piston. the construction providing'for a constantly open passage between both 'ends of said perforated piston. and means adapted to-be actuated into contact with said valve-stem abo e said second named valve to force said stem down\vardlr against the resiliency of its spring 5 in a-flushing valve. a hollow body havtherein inlet, outlet, pressure, and re liefchambers. .a valve=seat between. said iii-- let and outlet chambers, a valve for such seat, a pistoirhead in said pressure clianr her, a valve-stem -member coni'iecting said valve-andipistonhead, a valve-seat between said'pressure and relief chambers, a down weirdly-opening valve for'said last-nan'ied valve seat, a tube below said last-named valve seatandextending through said pistonhead. said tube being closed at the bot tom and opening into said pressure chamher. but there being an open passage between said inlet and pressure chambers, a stem for said second-named valve extending above the same into said relief chamber and below the same into said tube. a perforated piston carried by said stem in said tube. a spring arranged normally to force said stem and its valve and piston upwardly, means normally to close the perforation in said perforated piston, the construction providing for a constantly open passage between both ends of said perforated piston, and a rock-shaft journaled in said body. and provided at one end with a cam to act on said valve-stem, and at the other end with an arm.

6. In a flushing valve, a hollow body having therein inlet, outlet, pressure, and relief chambers, a valve-seat between said inlet and outlet chambers, a valve for such seat. a piston-head in said pressure chamher, a valve-stem mem'ber connecting said valve and piston-head, a valve-seat between said pressure and relief chambers, a down wardly-opening valve for said last-named valveseat, a tube below said last-named valve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamher, but there being an open passage between said inlet and pressure chambers, a stem for said second-named valve extending above the same into said relief chamber and below the same into said tube, a per forated piston carried by said stem in said tube. a spring arranged normally to force said stem and its valve and piston upwardly. means normally to close the perforation in said perforated piston, the construction providing for a constantly open passage between both ends of said perforated piston. a rock-shaft journaled in said body, and provided at one end with a cam adapted to act on said valve'stem, and at the other end with an arm, means to limit the rotation of said rock-shaft in the direction which disposes said cam in inoperative position relative to said valve-stem, and a spring arranged normally to retain said rock-shaft at such limit of rotation.

7. In a flushing valve, a hollow body having therein inlet, outlet, pressure, and relief chambers. a valve-seat between said inlet and outlet chambers, a valve for such seat, a piston-head in said pressure cham' ber, a valve-stem member connecting said valve and piston-head, a valve-seat between said pressure and relief chambers, a downwardly-opening valve for said last-named valve-seat, a tube below said last-named alve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamher. but there being an open passage between said inlet and pressure chambers, a stem for said second-named valve extending above the same into said relief chamber and below the same into said tube, a perforated piston, carried by said stem in said tube, a spring arranged normally to force said stem and its valve and piston upwardly, means normally to close the perforation in said perforated piston. the construction providing for a constantly open passage between both ends of said perforated piston. a rock-shaft journaled in said body, and provided at one end with a cam to act on said valve-stem, and at the other end with an arm, and further provided with an intermediate projecting member, a projecting member fixed in said body in the path of said first-named projecting member to form a stop therefor, and a spring arranged normally to retain said rock-shaft with its pro jecting member in contact with said fixed projecting member, said cam then being out of active engagement with said valvestem.

8. In a flushing valve, a hollow body having therein inlet, outlet, pressure, and relief chambers, a valve-seat between said inlet and outlet chambers, a valve for such 'seat, a piston-head in said pressure chamber, a valve-stem member connecting said valve and piston-head, a valve-seat between said pressure and relief chambers, a (ilOWlh wardly-opening valve for said last-named valve-seat, a tube below said last-named valve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamher, but there being an open passage between said inlet and pressure chambers. a stem for said second-named valve extend ing above the same into said relief cham ber and below the same into said tube, a piston carried by said stem in said tube and having a passage therethrough, a ball valve arranged normally to close said passage at the upper end. a spring arranged normally to force said stem and. its valve and piston upwardly, the construction providing for a constantly open passage be tween both ends of said perforated piston. and means to open said second-named valve against the force of said spring.

9. In a flushing valve, a hollow body having therein inlet, outlet, pressure. and relief chambers, a valve-seat between said inlet and outlet chambers. a valve for such seat, a piston-head in said pressure chain her, a valve-stem member connecting said valve and pistonhead. a passageway be tween said relief and outlet chambers. :i valve-seat between said pressure and relief chambers, a downwardly-opening valve for said last-named valve-seat, a tube below said last-named valve-seat and extending through said piston-head. said tube be ng closedlat the bottom and opening into said pressure chamber, but there being an open passage between said inlet and pressure chambers, a stem in said tube tor said S((' ond-named valve, a perforated piston carried by said stem in said tube. means nor mally to, close the perforalitm i"? said per 10. In a flushing 'alve, a body comprhing a caslng having therein nle and on let chambers with a valve-seat l'ietween. a dome, a plate between said casing and dom dividing the space above said valvc-sca. in said casing and dome, into a pressure chamber below and a, relief chamber above, and means to secure said dome and plate to said casing, a valve for said scat, a pi ton-head in said pressure chamber, a valve stem member connecting said valve and pi ton-head, a Va ve-seat in said plate, a dim wardly-opening valve for said last nained valve-seat, a tube below said lnstanune'l valve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chain her, but there being an open passage bet ween said inlet and pressure chambers. a slam in said tube for said second-named valve. a perforated piston carried by said atom in said tube, a spring arranged norn'iallv to force said stem with its valve and pir-ton. upwardly. means normally to close the pert'oration in said perforate-cl piston. the construction providing for a constantly opew passage between both ends of said pertn ated piston. and means to open sa d serout named valve against the force of its spring.

11. In a flushing valve, :1 body comprising a. casing having therein inlet and outlet chambers with a valve-seat between a dome, a plate between said casing and dome dividing the space above said valvoseah in said casing and dome, into a pressure chanr ber below and a relief chamber ab ve. sa d plate and casing having therein an opening and a passage, respectively. vvhish a e in alignment and form a passageway from :5; id relief chamber to said outlet chamber and means to secure said dome and plate to said casing, a valve for said seat, a pistonhead in said pressure chamber. a valve-sten nieniber connecting said valve and piston-head. a valve-seat in said plate, a downwardly-open ing valve for said last-named valve-seat. a tube below said last-named valve-seat and extending through said piston-head. Sltvll tube being closed at the bottom and opening into said pressure chamber, but there being an open passage between said inlet and pressure cl'iambers. t stem 'in said tube for said secondnamed valve. a perforated piston carried by said stein in said tube. a spring arranged normally to force saidstean with its valve and piston upwardly, means normall to close the pcrtoration in said perforated pistom the construction providing for a eonstantlv open passage between both ends ot said perforated piston. and means to open said second-named valve against the force of its spring.

12. In a flushing valve, a body compris ine a casing havingthereindnlet and outlet chambers with a valve-seat between, a dome, a plate between said rasing and dome dividing the space above said valve-seat. in said casing and dome into a pressure chamber below and a relief chamber above, means to locate said dome in a predetermined position circumferentially on said casin yand means to secure said dome and'platetosaid casing. a piston-head in said pressure chamber, a valve-stein member connecting said valve and piston headya valve-seat in said plate, a downwardlvopening valve for said last-named valve-seat. a tube below said lastnamed valve-scat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamber, but there being an open passage between id inlet and pressure chambers, a steam in said tube for said secondnamed valve, a perlorated piston carried by said stem in said tube, a spring arranged normalv to force said stem with its valve and piston upwardly, means normally to close the perforation in said perforated piston, the construction providing for a constantly open passage between both ends of said perforated piston. and means to open said setond-named valve against the torce of its spring.

t3. In a flushing valve, a body comprisinn a cz'ising having therein inlet and outlet chambers with a valve-seat between, a dome, a plate between said casing and doiue dividing the spare above said valveseat, in said casing and dome. into a pressure chamber below and a reliet chamber above. said plate and easing having therein an opening and passage. respectiwly. which turn] a passageway from said veliet hamber to said outlet chai'nber. means to insure the alignment of said opening with said passage. and means to secure said dome and plate to said casing, a valve for said s at. piston-head in said pressure chamber. a valvesteni member connecting said valve and piston-head. a valve seat in said plate. a do\vnwardly-opening valve for said last-named valve-seat, a tube below said last-named valve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamber, but there being an open passage between said inlet and pres sure chambers, a stem in said tube for said second-named valve, a preforated piston carried by said stem in said tube, a spring arranged normally to force said stem with its valve and piston upwardly, means normally to close the perforation in said perforated piston, the construction providing for a constantly open passage between both ends of said perforated piston, and means to open said second-named valve against the force of its spring.

14. In a flushing valve, a body comprising a casing having therein inlet and outlet chambers with a valve-seat between, a dome, a plate between said casing and dome dividing the space in said casing and dome, above said valve-seat, into a pressure chamber below and a relief chamber above, said plate and easing having therein an opening and a passage, respectively, which form a passageway from said relief chamber to said outlet chamber, means to insure the alignment of said opening with said passage, and to locate said dome 1n a predetermined position circumferentially on said casing, and means to secure said dome and plate to said casing. a plston-head 111 said pressure chamber, a valve-stem member connecting sald valve and piston-head, a valve-seat in said plate,

a downwardly-opening valve for said lastnamed valve-seat, a tube below said lastnamed valve-seat and extending through said piston-head, said tube being closed at the bottom and opening into said pressure chamber, but there being an open passage between said inlet and pressure chambers, a stem in said tube for said second-named valve, a perforated piston carried by said stem in said tube, a spring arranged normally to force said stem with its valve and piston upwardly, means normally to close the perforation in said perforated piston, the construction providing for a constantly open passage between both ends of said perforated piston, and means to open said second-named valve against the force of its spring.

HOWARD A. SPEAR. Witnesses C. C. WEST, F. A. CUTTER.

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