US1554453A - Balanced valve - Google Patents

Description

Sept; 22, 1925;

H. R MATSCHULL. ET AL BALANCED VALVE o nucnlow 1511M Ofiohmam alto "513A 2 Sheets-Sheet l Filed Oct. 17, 1925 Sept. 22, 1925.

1,554,453. H. R. MATSCHULL ET AL BALANCED VALVE Patented Sept, 22,1925.

UNITED STATES; PATENT- orrica.

HERBERT a. uA'rscHUL'L AND oscaze r noiiitan, or MILWAUKEE, wrsoonsm", jessxenoas TO xommme. comranv, or mnwauxnn, WISCONSIN, ,a coaronarron.

BALANCED: we.

Application filed October 17, 1923. Serial 'No. 869,077.

To all whom it may concern:

Be it that we, HERBERT R. ,MA'rso ULL and OSCAR FRoHMAN, citizensof the-United States, residing at Milwaukee,. in the county of Milwaukee and'State of-Wisconsin, have invented certain new and useful Improvements in Balanced Valves, of which theffollowing is a specification.

Under practical conditions of use it is customary to employ in conjunction with concrete mixers, a water tank adapted to supply the mixer with a charge of water propor tioned to the quantity ofsolid aggregates to be handled in-themachine. The water supply tank, or'reservoi'r, is in turn supplied with water from a'main pipe line that leads to a suitable source of water; valve means are usually provided-to. control passage of the come necessary at mostinopportune moments I in the operation of a large mixmg plant dependent upon efiicient water supply control means.

The novel features of the present invention reside. primarily in utilizing a three-way valve under peculiar manual and automatic control; the provlsionof a special construction of the valve and acounter balancing piston soarranged in a valve casing as to be bodily displaceable therefrom in a minimum amount of time,- and by the operation of very few parts; certain provisions whereby the movement of the valve is rendered very quick in action so that accurate measuring of the water delivered by the operation of the valve maybe insured; together with. other detailed provisions,the advantages of whichflwill ap pear quite fully on reference to the appended description. I 1,

In the accompanying drawings, 5

Figure 1 is a general view somewhat in elevation'of the three-way valve mechanism, with its manual and automatic operating "contrivances and water pipe arrangements Illustrated in full lines, and certain parts of a concrete mixing-machine to which the same maybe applied, illustrated in dotted lines.

Figure 2 is a top plan view of the main valve" mechanism features and operating parts, seen in Figure 1, the mixer features being omitted from theillustration. Figure 3 is an enlarged top plan view showing more p'articularlythe'valve casing and the'operatingcontrivances therefor, the automatic operated arm being shown in sec-, tion at its axis, and the manual actuated arm for opening the valve being omitted.

Figure '4 is a vertical sectional View through the valve casing and adjacent parts of the valve mechanism, the dotted lines showing extremes of shifting movement of the valve lifting lever and the arrangement of theparts, when they are moved from a position in which the valve is open to a position in which it is closed.

Referring to Figure 1 of the drawings, the concrete mixing drum is designated A, the supporting frame work B, and the loading skip at C, said skip being illustrated in several positions to show how' the "pin or" lug .1 thereof, engages the lower end of the actuating bar 2,.by which the valve of the invention is opened automatically on the rising movement of the skip, as will appear";

more fully hereinafter Onthe upper portion of the framework B is mounted a valve casin 3 which is equipped with a pipe 4 that lea s laterally from its middle portion to the measuring water tank not shown Said water tank would belocated on the framework B just above the lefthand end of the pipe 4, were there room in Figure l'to illustrate it; said water tank would also be provided with a measuring valve by which to determine the quantity of water to be fed to the mixer drumA Since the measuring valve is well known in the art of concrete mixing machines, and is well exemplified by the construction presented in the U. S. Letters Patent of Koehring No. 1,149,922, issued August 10, 1915, no showingof this particular valve is made herewith as differ-- ent types of such valve might'be employed any way within the purview of the inven- Figure 1 so as to enter the mouth, or charging opening of the drum. Connected with the upper end portion of the casing 3 is the water supply pipe 6, having its lower por- 5 tion 6 leading downwardly and off to'any suitable point of connection with the main pipe line that forms the source from which a suitable head of water is lead to the mixing machine. As the pressure in the pipe 10 line varies greatly under actual conditions of, service ranging from 25 pounds to 250 pounds, the desirability of a balanced valve mechanism for controlling the passage of 1 water with such a pressure, will be quite ob- 5 vious.

25 and the uppermost inflow chamber 9. lAt its I middle portion, or section, the casing 3 is.

equipped with the opposing valve seats 10 and 11, the lower valve seat being carried by an annular web 10 integral with the casing 30 3, and the upper valve seat ll being formed at the lower end of a removable cylinder 12, mounted in the upper portion of the valve casing 3. The cylinder 12 is formed with an annular shoulder 13 that rests upon a similar shoulder 14, projecting from the wall of the casing 3 at its middle portion. The cylinder 12 has mounted therein the counter-, balancing piston 15 through which passes the stem, or piston rod 16 suitably screwed 0 or otherwise applied to the piston itself, the

lower end of aid rod 16 having a pivotal connection, as shown at 17 with the stem 18 of the three-way valve 19 which is mounted between the seats 11 and 10. The valve has a downwardly projecting stem 20 which passes through a guiding-yoke, or spider, 21, that is formed as a part ofthe valve seat, or ring 10. In its circular wall the cylinder 12 is formed with openings .22 that enable the water passing into the upper portion of the cylinder portion of the casing 3, to pass on downwardly through said openings to the middle chamber 7 of the casing 3 when the valve 19 is in the position of Figure 4.

At its upper end, the cylinder 12 is formed with a centering annular shoulder 12 that fits snugly into the casing 3, and there is applied to the casing 3 a cap, or cover plate, 23,

seen best in Figure 3 as comprising a body having three outstanding or diverging lugs 24'through which bolts 25 pass; said bolts also passing through openings in lugs 26 ofi-standing from the upper end of the eas- 0 ing 3. It is notable however, that the rod or flow into the upper end portion of the stem 16 passes through a central opening in the cover plate 23 and the need of a packing box at the opening, is obviated, owing to the provision of'the packing 27 acting between the plate 23 and the internal removable cylinder 12 It should be particularly observed that the valve 19, and itsfremovable seat 10 are of a diameter less than the diameter of the .opening in the casing 3 at theshoulder 14; the reason for this is to enable removal of the valve and the part '10 upwardly through the casing when desired. F urthermore,. it is clear fromthe construction as illustrated,

that when the cover plate 23 is detached from the casing 3, the cylinder 12 with its packing 27 and the valve 19 maybe removed as a unit. A gasket 29 may be located between the shoulder 13 of the cylinder 12 and the shoulder 14 of the casing 3, and said gasket may be readily renewed whenthe parts 12 and 19 are removed, and if necessary, the seat 10 accessible for its removal, something. however, which would hardly ever be necessary because the piston 19 is provided with rubber seats for engagement with the seats 10 and 11 respectively of the parts 3 and 12 respectively.

Operating means for the valve 19 may now be set forth and consists of a lever 30 pivoted to abracket arm 31- on the cover plate 23, said lever having a loose pin and Sl( Y connection at 32 attaching it to the upper end of the stem or rod16. At its free end the lever 30 has pivotal connection at 33 with a link 34, that extends downwardly at one side of the casing 3, and is connected by a cross pin 35 with a throw-over lever 36 pivoted at 37 to the outer end of a bracket 38, which projects laterally from the easing 3 and may preferably be integral therewith. The throw-over lever 36 embodies spaced sides and a cross head 36*, and has connection by bolts 40 at its end with springs ,41.attached at theends opposite the bolts 46 to a rock shaft 42. The attachment means between the shaft 42 and the springs consists of small plates 43 freely pivoted on the rock.

shaft in a loose manner. The shaft 42 is mounted in suitable bearings onthe bracket 38 parallel with the axis 37 of the throwover lever 36, and said shaft 42 carries a pair of curved arms 44, which are keyed to the shaft, as shown at 45 so that when the. shaft is rocked the saigl arms may move the lever 36 up or down dependent upon the direction of rocking. This result is obtained because the outer arcuate moving ends of the arms 44 are connected to the sides of the lever 36 by means of. the cross pin 35 that forms the attachment means between the link 34 and said lever 36. the said pin 35 passing throughslots 36" in the said sides of the lever 36. Mounted on one end of the rock shaft 42 is the operating arm 46 which- I is loose on-the shaft, but has a lug 47 extend-- ing from its hub portion to engage with a collar 48 keyed to The outermoving 'end of. the arm 46 is attached to the actuating bar 23% the ,uppei end of the latter. The bar 2, it will be remembered, is capable of being shifted upwardly by the pin 1 on the skip C, and this movement is relied upon for, an automatic opening of the valve 19 to be shortly described quite fully. The .bar 2 is guided in its up and down movement by a guiding -yoke 50, between the sides ofwhich may be mounted a, roller 51 on which the bar 2 rests and moves easily. The bar 2 furthermore, is made in sections including the :upper-,

end opposite thathaving the arm 46 thereon, is mounted the, operating arm -52 suitably keyed or afiixed on the shaft 42, and being connected by a rod 53 witlia manually 1' operable lever 54 pivoted to the framework of the machine.- The purpose of I the lever 54 will be apparent hereafter.

With the construction of the machine dis-i closed as above the operation of 'thesam'e will be now set forth.'

, Itjwill be assumed that the valve parts; I are in the position of Figure 4, that is, water has been supplied to. the measuring tan through the pipe 4,,and said tank islfullvand readyv to supply the mister. -Under these conditions water fills thecha'mbcr'i'h i pipe 4, the-water t'ankxnot showni, the

upper'endof the casing 3, in fact all of't'he' f casingabove the valve- 19. The pressure of the water acts with'counter-balancing eff-acts.

upwardly against the piston 1 2;and downwardly upon the to of the valve,.19.' Under these conditions, tie expenseof compawfj' g ,the liquid 'aggregatefof a batchofconcr'ete tively littlepower is required inorder to open the valve 19 by an upr'aising action. It is next assumed that the \mixer" will now be charged by the skip C, whichis raised in the customary manner of operation of; these parts of concrete mixing machines, and as said skip rises to supply the solid" aggregates to the mixingdrum A the-'actuating'bar 2 moves upwardly. At a certain time in the rocking movement ,of ,the, lever 46, caused by said bar 2, thef'lug47 cooper-- ates with the collar '48 on the shaft 42 to the shaft 42 and raise the curved arms the shaft 42, as shown,

I ings 22 "into the chem 44 thereof: This action results inliftin'g the link and correspondingly raising the piston 12 and the valve "19. As soon as the link-34 and the lever 36' is raised from a position as shown in Figute 4 in full lines to one. in which'the pivot pin is above a line intersecting the axes 37; and 42, it will be 'clear that the springs 41 will throw the lever 36 over the dead center, or rather,-

quickly move it above the dead center point?- so as to effect a quick'action of closing the valve19 against the seat 11; Under these conditions the supply of water is out off from the upper piston chamber of the casing", v

3, and the pipe 6', and the chamber 7 is opened to the chamber 8 to permit the water to flow from the measuring tank through" the chambers 7 and,8, below -the'=valve'19,

and through the pipe 5 into "the mixing drum A, Should it be that the operator desires to admit a little extra waterv into the mixing drum A, in a quantity greater than thatpermitted by the measured amountthat flows from the tank, the manual lever 54 may be actuatedto rock shaft 42 clock wise slightly, open the "alve 19 and let water pass directly. from the chamber 9' to the chamber 8.- i 1 ,u The' foregoing-condition does not often iarise, but might under practical conditions of service. I As regards the further operation of the will, be seen from Figure ,1- that the ski valve'19 to assume its normal position, it,

operation will move downwards with the actuatin or tri bar 2 without affecting the shaft 42.,

sooneas the water has passed from. themeasuring tank into the mix'er drum, the operator, will actuate the lever 54 aiid throwthe arms 44 and the lever '36 back tgi their, original positions of fulh ,linesgih figure 4.; This action closes 'com- "irnunication between the pi e 4. and .the chamber 7, with-respect to 'the outlet sham be18,'and thereupon the flow qf water'willp' pass from. the'main supply pipe 6 into the" through the open- 7 above the valve 19,-and on through the pipe4. to the measur ngtaglg The latter is thus refilled ready 1. 15 1 3 5 1 charging operation to supply chamber 9 of the casingetl, r

in the mixin drum A;

erably underfpraotically little, or no tension when the lever 36 is'in either of its extreme positions. ,Their tension however/is increased to an operative tension for the purposes described, as the .leve-rr36 approaches a central position in line with the axes 37 and 42, which is practically the dead center oint of movement of said lever. When the ever 36 is moving upwards, or downwards,

past said center polnt, the, action pf the springs 41- is the same in effecting a quick final seating movement of the valve 1%).

. By E- erely, disconnecting the "pivot part 33 t'o d d and removing the threebolts25, theoperator is enabled to lift on the parts '30 "and 23 and withdraw the counter balance piston 15,

the cylinder12, the? valve 19, and' the, di

.rectly' attached parts, from. within the cats ing 3, all practically as g structure. I v Having thus described our invention what we claim as new and desire to secure by Letters Patent is, p F i l; Ina three-way valve mechanism of the class described; in combination, a valve c'asremov,able unit ing, 'a Valve 'movably mounted therin', :1 cyl:

inder removably mounted in, said casing, a countenbalancing piston mounted in said cylinder and connected with the valve, means external to the casing for operating the piston-andthereby operating the valve, and

i means supporting the piston, valve, and cyl inder parts on the casing, so as to permit their,

removal as a unit from the casing.

2. In a three-way valve mechanism of-the class described, in combination, a valve cas-l ing, a valve movably mounted therein, a cylinder removably mounted in said casing, a

counter-balancing piston mounted in said cylinder and connected with the valve, means external to the'casing for operating the pis- ,ton and thereby operating thevalve, means supporting the piston, valve, and cylinder parts on t e casing so as to permit their removal as a unit from the casing, the operate ing means for tlhe piston including a piston '1-od,"a coverplate above to the casin and through which saidrod passes, together with a acking between saidcover late and said -oy inder, and the casing substantially as de c i ed p aft-Inga valvesmechanlsm of the class set i smith, in combination, a'valve casing pro sii'ded with avalve seat therein, and also previded with a supporting shoulder, a cylinder mounted onthe casingand engaging said shoulder, a -valve'mounted in the casing and movablelto and from said seat, a piston openating in, said cylinder and connected witliffth'e; valve, ,andwmeans holding the -eylindeir, litsl ipistomfxand said valve on the caslng but permitting their bodily removal froin the casing. j

' 4. In a valve-mechanism of the class set;

forth', in-comb ination, a valve casing pro *vided with aflvalve seat therein, and alsov provided with a supporting shoulder, a

cylinder mounted on the'casing and engaging said'shoulder, a valve mounted in the casing and movable to and from said seat, a piston operating in said cylinder and connected with the valve, means holding the cylinder,

=its piston, and said valve on the casing but permitting their bodily removal from the v with a seat forthe valve, and sa d cylinder being spacedfrom the casing and formed taoh the link 34 from the lever 30, ,with openings at its sides, a supply opening topass through the openings in the cylinder and past the valve, when said valve is un-v seated from the seat on the cylinder.

5. In a valve mechanism of the class set forth, in combination, a valve casing'having a bottom outflow opening, a middle valve chamber adapted to have communication with a measuring tank and provided also with a fluid supply opening at its upper portion above said chamber, said casing being formed with a shoulder at the upper-fend of said chamber ofa' diameter greater than the valve hereafter mentioned, a; valve disposed in the-valve chamber of the casing and adapted to be moved past theshoulder aforesaid, the casing having a valve seat at the bottom of said valve chamber on which said valve is adapted to seat at its underside, a cylinder disposed in said casing in spaced relation to the'latter and opposite said supply opening, and having a seat adjacent to said shoulder against which the valve is *adapted to seat at its upper side, a piston in said cylinder connected with said valve, and means external to the cylinder and casing for operating the piston, and thereby operating the valve, the cylinder having openings below the piston and between it and thevalve establishing communication bet,ween the,

space aroun chamber aforesaid.

d the cylinder and.- the valve 1 6. In a valve mechanism of the classset v forth, in combination, a.,val ve casing having" a bottomoutflow opening, a middleflvalve chamber adapted to, have communication valve hereafter mentioned, a valve disposed in the" valve chamber of the casing and i 7 adapted to be moved past the shoulder afore said, the casing having a valve seat at the bottom of said valve chamber on which said said shoulder against which the valve is means external to the cylinder and casing for operating the piston, and thereby operating the valve, the cylinder having openings below the piston and between it and the valve establishing communication between the space around the cylinder and the valve chamber aforesaid and a closing means for adapted to seat at its upper side, a piston in i said cylinder connected with said valve,

v the casing removable to the cylinder.

. chamber permit removal of" posed in the valve chamber of thecasing'and adapted to be moved past the shoulder aforesaid, the casing having a valve seat at the bottom of said valve chamber on which said va'lve is adapted to seat at itsunderside, a cylinder disposed in said casingin* spaced'relation to, the latter and opposite said supply opening, and having a seat adjacentto said shoulder a-gainstwhich the valve is adapted to seat at its upper side,

a piston in said cylinder connected with said valve, means external to the cylinder and casing for operating the piston, and thereby operating the valve, the cylinder having openings below the piston and between it and the valve establishing communication between the space around the cylinder and cylindeiya valve disposed in the casing and the valve chamber aforesaid, and a coverplate for the casing'engaging and holding the cylinder inplace therein and detachable to permit=removal ofthe cylinder and the valve with which it is connected.

g the class de- 8. In a valve mechanism of scrlbed, 1h comb nat on, a valve casing, a

cylinder arranged in said casing and removable therefrom, and provided; at its lower end with a valve-seat, the casing liavinga valve'seat spaced from that of the.

operating between the two' va'lve seats.

-scribed, in combination, a valve -casing acylinder varranged 1n sa d casing iandl 're-- movable therefrom, and provide above mentioned, a piston in the cylinder having connection with. the valve, and a coverplate applied to the casingand fengag ing said cylinder to holdit in place inuth'e casing, but permitting. removal of thc'ylin} der with its piston'hndthe said valve, and 1 means for operatingthe piston andlvalve parts, I v y .9. In avalve mechanism of the classdeat its lower end with a valve seat, the casing'havinga valve seat spacedfrom thatofrtthe,

' cylinder, a valve disposed in the casing and operating between the two valve seats above mentioned, a piston in the cylinder having connection WIT/l1 the valve, a coverplateapplied to the casing and engaging saidcylinder to hold it in place-in the casing, but permitting removal of thevcyhnder. with its piston and the said valve, means for operating the piston and valve parts, includ- 1.2. I'n a valve mechanism as set fto'pr'event displacement of sai ing a rod passing through the coverplate aforesaid, and actuating .means forTsaid rod, together with .packlng interposed between the coverplate and the cylinderto establish a fluid tight connection there between. I j 1 10.- In a valve mechanism as set forth, in combination, a casingprovided atits lower portion with a valve seat, a cylinder removablyfitted in the upper portion of the casing and having a valve seat at its lower portion, a valve disposed in the casing and operating on said seats according to adjust ment, a detachable coverplate for' the cas-' ing coacting to prevent displacement of said cylinder therefrom, a piston in said cylinder connected with said valve, and operating means for the piston valve, the valve being removable from the casing with the said cylinder and piston.

11. In a valve mechanism as set forth, in combination, a casing provided at its lower portion with a valve seat, a cylinder removably fitted in the upper portion jof the casing and havinga valve seat at its lower portion, a valve disposed in the casin and operating on said seats according to a justment, a detachable coverplate forgthe casing coactin-gto prevent displacement of said cylinder therefrom, a piston insaid cylinder connected with said valve, operating means and, p'iston, the operating means or the piston and valve comprisinga rod extending a 'to ,a polntexternalto the casing, a lever connected with said rod, a second throwover lever connected with, the first lever and movabl'e' to shift the valve from one ofits seats to the other and spring means co- 'for 'tlre'piston valve, the valvebeing removable, tromthe, casing with the said 0 linden operating withlthethrow over lever to effect ,a quick action of thelatt'er, and correspond- "ing quick movement of the valve when said A valve passes :a point substantially midway of-its'extrem'es ofiriove'menti' I I forth, in combination, a casing provided at its lower portion with avalve seat, a -cylin'derremovably fitted in the upper portion of the casing "and having-"a valve seat at its lower portion,

a valve disposed in the casin and operating on; said seats according to adjustment, a-detachable cove fPlate for the-casin coacting cylinder therefrom, a piston in said cylinder-con- ,nected with said valve, operating means for the piston valve, the valv'e being removable from the casing with the said cylinder and piston, the operating means for the-piston and valve comprising a rodextending to a point egcternal to thecasing, a lever connected with said rod, a second throw-over lever connected with the first lever and mov-,

able to shiftthe valve from one-of its seats to the other, spring means, cooperating with the throvvover lever to effect a quick action of the latter, and corresponding quick move-' mentof the valve when said valve passes a poinflsubstantially midway of its extremes off movement, said spring means comprising a spring attached-to a free swinging end of the said mentioned-lever'antLalso attached 'toai point of attachment which is eccentric of the pivot of said" second lever, whereby the spring actsto shift the lever quickly when it passes a dead center point of its movement a's uregards the point of spring connection was relation to the axis of the lever.

13; In a valve mechanism as set forth, in.

ic'ombina-tion, a valve casing, means for supplying a fluidfrom saidcasing to a mixing drum, amain Water supply pipe connected with the upper portion of the valve casing, a measuring tank Water conducting pipe vleading from the casing, a valve mounted in said casing to -control passage of-.Water through the casing to the mixing drum from a measuring tank, and to control passage of water from the main vater supply pipe, through the casing to the measuring tank, and means for operating said valve com prising a lever external to the casing connected to the valve, a throw-over lever linked to said first lever, spring means for compelling accelerated movement of the throw-over lever after its movement has been initiated a predetermined extent, a rock shaft for initiating the movement of the throw over lever operatively connected thereto, and means whereby movement is imparted to the shaft.

14. In a valve mechanism asset forth, in

combination, a valve casing, means for supplying a fluid from said casing to a mixing drum, a main water supply pipe connected With the upper, portion of the valve casing,-

a; measuring, tank- Water tconducting pipe lead ng/from the c'asmgg a valve mounted 1n said ,casmgjto, control 1 passage of Water through the casing to the mixing drum from a measuring tank, and to control passage of Water from the main water supply; pipe a ifirstlever, spring'means, for compelling ac-- celeratedmovement of the throw over lever through the casing to the measuring 'tank, means for operating" said valv ewcomp'risjng a lever extei nal to t'h e casing connected to thevali e a throw-over lever linked to said after its'mov'ement has been initiated a predetermined extentg'a rock shaft for initiatv m the movement f the throwrover level.

- operatively connected thereto, means Whereby movementis imparted to the shaft, and

means for varying the extent of movement of the last mentioned means, to control the time of operation of the rock shaft.-

15. In a valve mechanism as set forth, in combmatlon, a valve casing, means for supplying a fluid from'said'casing to a mixing weets said first lever, spring means for compelling accelerated movement of the throw over lever after its movement has been initiated a predetermined extent, a rock shaft for initiating the movement of the throw-over" lever operatively connected thereto, means-Where- I by movement is imparted to the shaft, and a manual lever controlling the operation of said rock shaft to restore the valve to 21, normal original position after actuation.

16.In a valve mechanism as set forth, in combination, a valve casing, means for supplying a fluid from said casing to a mixing drum, a main water supply pipe connected with the upper portion of the valve casing, a measuring tank Water conducting pipe leadingfrom the casing, a valve mounted in said casing to control passage of water through the casing to the mixing drum from the measuring tank, and to control passage of Water from the main water supply pipe through the casing to the measuring tank, I

and means for operating said valve comprismg a lever external to the casing connected to the valve, a throw-over lever linked to 7 said first lever, spring means for'compelling accelerated movement of the throw-over lever after its movementhas been initiated a predetermined extent,a rock shaft forinitiating the movement of the throw-over lever operatively connected thereto, means whereby movement is imparted to the shaft, a manual lever controlling the operation of said ro ck shaft to restore the valve to a normal original position after actuationbyt-he skip, a loose connection intermediate the.

' movement imparting means and therock shaft, whereby the said movement im arting means may move independently of t e rock 7 v shaft, said manual means being operable to actuate the valve partially independently of its full restoration to a normal original position.

s17 In a valve mechanism as set forth, in combination, a valve casing, means for sup plying a fluid from said casing to a mixing drum, a main Water supply pipe connected wlth the upper portionof the valve casing,

a measuring tank Water conducting pipe leading from the casing,"a valve mounted in said casing tp control passage of Water through the casing to the mixing drum from the measuring tank, and to control passageof water from the main water Supply pipe through the casing to the measuring tank,

I means for operating said valve comprising a lever external to the casing connected to the valve, a throw-over lever linked to said first lever, spring means for compelling. accel- I erated movement of the throw-over lever after its movement has beefi'initiated a pre: determined extent, and means whereby move-;

v the influence of the throw-over lever.

18. A valvemechanism, in combination, a valve casing, a valve in the cas1ng,operat1ng means for said valve ncluding alever' ex ternal to the casing connected with the valve,

means for actuating'said lever to carry the valve to a predetermined operative position, and adapted to move independently of aetuation of said valve, and manual means for restoring the valve to a normal position after its operation by the actuating means.

i 19. A valve mechanism, in combination, a,

valve casing, a valve in the casing, operatlng means for said valveincluding a lever external to the casing connected with the valve, means for actuating said lever to carry the valve to a predetermined operative. position, and adapted-to move independently of actuation of said valve, manual means for restoring the valve to a normal position after its operation by the actuatin means, and operable to partially actuate t e valve as a separate operation independently, of a full restoration of the valve to its normal position for the purpose set forth, f

20. In valve mechanism of the class described, in combination, a valve casing,"a cylinder arranged on; said casing and re- ,movable therefrom, said cylinder being pro vided at its lower end with a valve seat,'.the'

casing having a valve seat spaced from that of the cylinder,.a valve disposed in the casing and operating between the"two valve seats above mentioned, a'piston in the cylinder having a connection with the valve so that the two may move together, means for holding the cylinder in place on the casing but permitting removal of the cylinder with its piston and valve, from said casing, means for operatingthe piston and valve parts, including connecting parts extending through the cylinder and casing, and a lever device operatively connected with the last mentioned parts for imparting proper movement to the piston and valve.

21. In valve mechanism of the class described, in combination, a valve casing, a cylinder arranged on said casing and rev movable therefrom, said cylinder being provided at its lower endwitha valve seat, the

casing having a valve seat" spaced from that of the cylinder, a valve disposed in the casing and operating between the two valve seats above mentioned, a piston in the c linder having connection with the valve sot at the two may move together, means for holding the cylinder in place on the casing" but permitting removal of the cylinder with its pis- 'ton and valve, from; saidt'casing, means for operating thepiston and valve parts, including connecting parts extending through the cylinder andcasing, and a lever device connected to the last ment-ioned parts at a point above the cylinder and adapted to reciprocate the piston and the valve to cause 00- op'erationof the valve with eitherone of the valve seats in the valve casing, the valve casing having a shoulder upon which the cyl-,

inder aforesaid is seated when assembled with saidcasingfawater inflow passage communieating with the cylinder between its piston ,and said valve, the valve casing being providd with an outflow and i'nflow passage, and

HERBERT R. MATSCHULL. OSCAR FROHMAN.

with a Separate P ge governed by said valve) 1

Images