US2386608A - Stack hung flush tank - Google Patents

Description

1945 V.A.IHOFFMANN 2,386,603

STACK HUNG FLUS H TANK Filed June 12, 1942 3 Sheets-Sheet 1 ATTORNEY.

1945- v. A. HOFFMANN STACK HUNG FLUSH TANK :sfsheets-sheet 3 Fild Jux le 12, 1942 llll llllllllll |l|.ll

ATTORNEY.

Patented Oct. 9, 1945 UNITED STATES PATENT" OFFICE g i a flofaesaeos *s'rAo n'uNc FLUSH-TANK a victcr fAgHoffmann, Haga iApplicationlJune 12, 1942, SQll'iRil-INQ. 446,695 I I 16'Clai'ms.

mufller in reducing. audible operating noises created within the-tank, 1

In addition to the foregoing silencing means there. is also-provided mechanical" means for quicklyopening and closing the-ball cock ;of'a relatively large supply line; Moreover theimproved device is designed and constructed to be positioned within a-wall. Consequently, operating noises arereduced to-a minimum.

One of the principal objects of advantage and importance of the improved? deviceof this -invention is the provisionof means for using a relatively -small float chamber which may be quickly filled after the water. in the body ofithe shell or tankreaches a predetermined level.

Accordin'gly,--the time required for the closing movement ofthe float and associated ball cock inthe supply line is correspondingly short. u I

Another Object 'of advantage and importance resides in the provision of means for venting the sealed flushtank at some remotepoint. The Vent; which provides the. only opening between the interiorof the tank-and atmosphere, may:

be extended to anaattic or some other unused portion of ahouse or building.

A further object of advantage and importance of the improved tank of this invention isthe provision of means forutilizingasiphon inconjunction with a -gravity-ieed ejector for quickly filling the small float chamber.

Another objector importance is the provision of means for positioning a hush box in thedis-:

charge passageway of the tank and providing means for venting the hush box through a vent tube. The hush box includes means -for providing a water seal which tendsto prevent the passage of noise through the tank discharge pipe.

Still another object ofimportance and advantage of the presentinventio-n resides in the pro-" vision of means for securing the improved device to a stack. '1 Accordingly, whenthe improved tank'is associated' with a stack hung bowl,the entire plim lbing fixture is supported independently inwhich itis positioned.

nadditional objectv of advanta eiand iimportance' is the provision of means for supplying 6O additionalwater to the float chamber after the r the framework of the house'or building ball cock is closed to increase the holding and; closingpressure. I W v Sti11 another objectof advantage of the proved device of'this invention is the provision of means for utilizing a siphon as a passageway for emptyingthetank and the'small float cham-, ber,'.in conjunction with a Douglas valve for starting, the siphonicaction. a j A further point of advantage and-importance is the provision of means for positioning areceiving and refill chamber'in the upper portion of'the improvedtank of this invention: V j stillanother object of importance is the provision of means for inspecting the interior of the improved tank by the removal of V a closure meme ber'from the front surface thereof;

Additionalcbjects' of advantage an w im rtance will become apparent asthe following deg tailed description progresses, reference being had to the accompanying drawings, wherein:

Fig. lis an elevational vi wot a stack hun sealed; flush' jtank which embodies the invention, parts thereof being broken away.

Fig. .2 is a horizont 1 section taken on line 2 --l2' of. Fig. 1; looking in the direction indicated by'thearrows', a

3 is .averticaljsection taken on line,3 ,3 of Fig. '1, looking in the direction indicated by the arrows; f l

Fig. 4 is a slightly enlarged section QfiaZ fragmental. portion of the'device. taken on line 4 4 of Fig. 2, looking. in the direction indicated by the arrows. g Fig. 5 is a front elevational view of a slightly modified construction of the inventiomf parts thereofbeing broken away..

' Fig. 6 is'a vertical section arrows.

Fig. '7. is a vertical section taken on line (if-56 of Fig. 5 looking in the opposite direction. .Fig.. 8 is a horizontal section taken on line 8-3101" F g.5.; y

I As sh wn n. th v draw n s:

The reference' numerallfl indicates generally the tank or shell of the improved device of this invention. .In the preferred embodiment, of the invention, he

Formedin the front surface of the tank "I is.

Projecting upwardly fromthetop of the tank It), preferably adjacent one end thereof, is a vent connectionandfpassageway H5. The vent passageway 'may be extended as desired by pipes l8.

Extending upwardly from the top of the'tank taken onlinefi t of. Fig. 5. looking in the direction indicatedby the tank In comprises a sealed she'll.

I is a plurality of supporting lugs 20 which are adapted to be secured to a supporting arm 22. The supporting arm 22 is adapted to be secured to a stack 24, as is clearly shown in Fig. l.

Positioned within the tank It at one end and near th botto-m thereof is a substantially cylindrical float chamber 261' The float chambe 26' extends from a point near the bottom of the tank I0 upwardly as is best shown in Fig. 1.

Projecting outwardly and thence upwardly" from a point closely adjacent the bottom of the float chamber 26 is a discharge pipe 281 Hingedly positioned to cover the upper end of the discharge pipe 28 is a check or gate valve 30. The check valve 30 is adapted to swing freely upon its'pivot; Accordingly thewaterlevel within the float chamber 26' cannot be maintained" higher" than. the waterlevel withinlthe tank. I'O- unless the water level: in. the tank. is. below the discharge end of. pipe/2'81.

Extending into the tank H1v is a supply pipe 32. The supply pipe 32is provided with a-ball cock 34.

Operably secured to the ball cook 34; and ex-' tending to a point. directly above the float chamber ZB'isaneperatingra-rm 3'6.

Qperabhz positioned. within the float chamber 26 and connected. tothe. operating. arm 36 by means of a link 381 is. a float. 4a. The float-40- is preferably mounted upon. a. guide member 42. The guide member 42. limitsthe. movement. ofthe float 40 to verticaltravel...

It. willrbe apparent from the, foregoing. that upwardmevement ofthe float and the left endot the'operating, arm 316- closes the ball' cock 34' and downwardmovement. ofthis portion of'the arm 36. and. the float opens the'ball cock.

Extending. outwardly and-upwardly from the ball cock 84 i av slightly enlarged continuation 32w of. the supply'line. 32.v Positioned on the end of thecontinuation 32a is av fitting 44". 'Ilhev fitting 44 is turned'to a horizontal plane paralleling. the top of the tank II] as. is best. shown-in Fig 1. Thehintermed'i'ate portion 46 of; the. fitting 41" is expanded as is best shown in Figs. 1,.2 and. 4'; The. expanded portion 46.01" the fitting 4'4 extends downwardly, as is clearly shown in the drawings, to form a'sump- The enlargedl'continuation. 32a reduces pressure but does not lessen the volume of water as compared topressu-reand volumebelbw the ball cock-34.

Projecting downwardly within the expanded portion 46- of the. fitting; 44, is a baffle plate. 48. The bafll'e plate 48 is .adaptedrtb directincomingwater downwardly into the expanded portion of the fitting. V

Extending. downwardly from the expanded portion 450i the fitting is an. ejector tube 50. Each en'dof'the ejector tube 50'may be restricted; as is. best shown in Fig. 4, with. the lower opening slightly larger than the upper opening.

Extending downwardly from the restricted pore tio'n of the fitting, 44 isa refill tube 52. The re filltube '2" is'ln alignment'wi-th andi adaptedto deliverwater into a combination vent and overflow tube 54. The upper end of the tube 54 terminates ata point-below the plane of the lower edge of theutility opening. [2 as is clearly shown in'Figs: 1 and.3.

Projecting: downwardly from the terminal of the fitting 44 is a tube 56. Both the upper and the lower end of the tube 55 are open.

It is to be noted that water delivered into the horizontal member. 44 in excess of the capacity of the ejector tube 50will flow through both the refill; tube 52 and'the tank fillingt'ube 56. Pressure is not required to operate refill or any of the other tubes.

Positioned astride the wall of the float chamber 26 is a siphon 58. The discharge leg of the siphon 58 is positioned within the float chamber 26.

Extending from the siphon 58'" to the ejector tube 50 is a tube 60. The tube 68 provides a means whereby air may be withdrawn from the siphon 58. and be discharged through the ejector tube 50.

The function of the air ejector 50 is to quicken the. action: of the ball cook 34 by starting the siphon 58 at a predetermined time thus quickly flllingJt'he small float chamber 26 and raising the float 4B. This. almost instantaneous closing of the; ball cook 34 isdesirabIe and of utmost importance. A slow. acting ball. cock is very apt to whistle andmoreover, foreigni'matter in the water lodges in and adheres to the; valve causing leakage; The quick" acting ball cock eliminates the noise nuisance and provides higher eificiency.

Projecting downwardly from the tube Ellis an extensible tube 82. The extensible tube 62 is adapted to be adjusted at'any desired height within'itsrange.

' The extensible tube 62, when itslower' end is abovethe-level' of the water'in the tank it, provides an air inlet passageway leading to the ejector 50'; When the lower end of the tube 62 is submerged thepassage of'air therethrough is barred. Consequently; action of the ejector tends to} evacuate'thesi'phon 58 through the tube 60.

Positioned on thefl'oor of the tank and extendingtherethrough is an outlet passageway 64'. iA Douglas ball 66 is operablyassociated with the passagewayasis bests-hown: in Figs. 1, 2 and 3 The Douglas ball 66 is connected to an operating handle: 68 through: a link Ill and an operating arm Proper movement of the handle BBrai'ses the? Douglas ball from-"the outlet passageway 64'.

Positinned om th'ebottom oi the tank It! direct- 1y beneath. the. dischargepassageway 6 1 is a hush box14i The hush box 14 providesa continuation of the discharge: passageway 64.

Eormedi within the hush box 14 is a downward-- 1y" projecting center wall 16 which in operation forms a trap o'r' Waterse'al. A irtrappedwithin the' hush bo'x W is vented tl'ir'ough the overflow pipe 54.- The discharge end of the hush box HE is preferably provided with a flange 13* to which a continuationmaybe secured.

The flange? 1-8 is provided with a downwardly extending member 1 9 as is best shown in Figs. 1- and Thisconstruction permitsthe extended portion tube t'e'lescoped within a counterpart; as shown in Fig. 1, and provides a self aligning, lealkiprooii and. substantially foolproof joint. The Weight of the tank alone upon the flanged porti'on ef the fitting- 80 is suflicient' to form a watertight joint.

Operation of the above disclosed structure is substantiallyas follows: The device, after installatiom isfille'd wate'rthrough the supply line 32'. The water flows through the extension 32:; into' the 4.12 and thence downwar'diy through the tubes 56; 52: and: 50- intothe shell om When the water in: the shell reaches the end of.- the extensible tube 62: thespassa'ge of: air thereth-roug-h isprevented. Consequently air is with- V The siphon 58 hasiacomparatively largecapacity box 4 is ented through 'the overflow tube lid' and may then be expelled from the tank through t e en 1.6-" float chamber '26' is maintained at a common level, while descending, through action of the gate valve 3il.- This valve functions to allow waterto, pass from the float chamber 26 into the shell 10 but prevents the passage of water from the shell lilinto the float chamber.

i After thewater level within the float chamber descends the float M also travels downwardly. Thisaction' opens the ball cook 34 and allows water to pass'therethrough. When the water ithin""the shell. is nearly all discharged, the Douglas valve 'closes'and the ,water from the supply line. refills theshell. Concurrently with the refillin a small amount of water is directed through 'the' refill tube, 52 into the overflow pipe 54 and thence into and through the hush box 14; Thiswater refills the bowl, not shown. I 7 When the water level within the float chamber is sufficiently high to cut off the ball cock 3'1 additional water is still within the expanded portion 45 of the fitting 44. The flow of this additional water from the fitting through the ejector tube 50 continuesthe siphon 58 in action thus slightly raising the water level in the float chamber 26., This raising of the water level inthe float chamber exerts an extra pressure on the ball cock and insuresperfect closing. When the expanded portion 46 of the fitting 44 has emptied itself all action with theshell I ceases and the flush'ta-nk is ready for the next flushing operation. In the slightly modified construction of the improved device of this invention as shown in Figs. 6, '7 and 8, the shell lOa is relatively nar: row in respect to its length. This construction has been designed for installations where an in creased volumeiis desired over the volume of the shorter tank of the preferred embodiment.

Formed in the shell Illa is an opening l2 a which is adapted to be employed for inspection and adjustment purposes.- Secured to the shell Illa covering the opening l2a is a closure member [4a. The closure member 14a may be secured in place by any suitable means.

Positioned on the upperportion ofwthe shell Illa is a vent Ilia. The vent lea may be threaded to receive a continuation, such as a pipe or the like. g

Extending upwardly from the tube of the shell Illa isapair of lugs 20a. The lugs are adapted to be utilized for securing the shell to a stack. orother supporting element.

' stricted to vertical travel;

:Water withinthe shell l0 and the Y Positioned within the shell Illa is a float cham I ber"26a. The float chamber 26a is preferably positioned at oneend of the shell Illa as is best shown in Figs.5and 8. v H 7 Extending outwardly and thence upwardly from a point closely adjacent float chamber 26a is an adjustable pipe 28a. The pipeZBa forms a passageway into the float chamher 2% and thus provides a means for filling the float chamber from water within the shell Illa;

the bottom of the Extending into the shell Hla is a supply line 31a; Positioned in the supply line 3|a is a; ball cock 34a. The ball cock 34a is operatively connected through thev operatingarms 36a and the standard 38a to thefloat 30a. Movement of the float 30a operates the ball cock 34a. Positioned within the shell Illa closely adjacent the top' thereof is a chamber 40a. Extending" downwardly from the chamber 30a is a discharge pipe 42a; The upper end of the discharge pi e 42a extends to a point well above the floor of the chamber 40a and the pipe is perforated 4Ia as is clearly shown by the dotted lines in Fi 5. Projecting downwardly from the chamber 40a is a refill tube 43a. The lower end of the refill tube 430 is telescoped within a vent pipe 44a, as is best shown in Figs. 5 and 6.

Extending upwardly from the ball cock- 34a to a point within the chamber 40a is a continuap tion 46a of the supply line 22o. Wat'er passing through the supply line is deliveredinto the chamber 40a.

Positioned within the shell llla as is clearly shown in the drawings is a siphon 48c. Thesiphon48a has an intake leg 50a positioned slightly above the floor of the shell 10a. An auxiliary leg 52a opens into the float chamber 26a. The discharge leg' 54a 7 through the floor'oi the shell Illa as-is best shown in Figs. 5 and-f7. ',Thesipho'n 48a f unctionsas an overflow and the lower "interior surface of the bend therein is positioned below the plane of the lower edge of the utility opening 12a as is best shown in Figs. 5 and 6.

Disposed on, the dischargeleg 54a of the siphon 33a at a point above the discharge end thereof is 3, Douglas valve'56a. Surrounding the Douglas valve is an inverted bell 58a. 1 The bell 58a funcin construction tothe hush box 14 shown in the preferred embodiment. Operation of the modified form of the invention is substantially as follows: The device is positioned in place and after interior adjustments are made theu tility door I la is positioned in place. The water is then turned'on and enters through the supply line 32a. The water is conveyed into the chamber-Mia and as the water level rises abovethe upper end of the tube 42a it overflows into the shell Illa. A portion of the water is directed from the chamber 40a through the refill tube 4321 into the vent tubeMd and thence into the hush box 60a.

When the water level within the shell rises to the top of the adjustable pipe 28a water is directed into the float chamber 26a. The float chamber 260. having a relatively small volume quickly fills. Thus the float action and the associated ball cock action is rapid. After the ball cock is completely closed the water from the chamber 49a drains through the perforation Ma and the refill tube 43a. The additional water delivered through the perforation 4la raises the level in the tank Illa and exerts an increased pressureon the ball cock 14a. The device is now ready for flushing.

32a'and the ball'co'ck 34a of the siphon 48a extends a Elushing; is,accomplished byppening the Douglas valve. 56a. Water poursthroughthe valve into, the discharge leg of the siphont This. action tends.

torarify the air inthe upper portion=of the-siphon 4 8a, and when, the water level has. receded.- sum-- ciently, so that, the-Douglas valve isv drawn to its.

seat, siphonic action is. immediately. started. The fallofthe water level within the tankand within, thefloat chamber is balancedv by, atmospheric pressur e. As the. waterin the tank is.

withdrawn the float 30a lowers and opens the ball. cock 3.4a.

It will be. apparent.- from: the foregoing that hfirein isprovided a compact and. highly efficient flush tank, which. may. be positioned within a. conventional wall orif, sodesired, positioned outside of,,a. wall.

It, will befurther apparent that the modified formyofthe device with. its greaterdepth and greater-pressure is no harderto operate (raisechanges in, desig andconstruction may be made without: departing from, the spirit or scope of the invention, Accordingly, the patent granted hereon isnot to be limitedtothe. precise embodiment here shown nor in any other manner except as is necessitated. by. the terminology of the. appended claims when given the range of equivalents, to-Which they may be entitled.

I claim as my invention:

1, In a, flush tan-k, an, enclosed shell having a valved outlet, a valved supply line extending into.

said shell, afloat chamber positioned within said shell, a-fl o at, opepably positioned within said float chamber, said float being o-perably joined to said supply line, siphon means for filling, the float chamber after the waterin the shell reaches a predetermined level, means operable to; maintain the; discharge end: of said siphon sealed against the passage of air thereintowhen the water in the shell is discharged, and means for discharging the water from the float chamber and the shell; in unison.

2. Ina flush tank, a shell having an inspection opening therein, a closure removably positioned oversaid; opening, a vent passageway extending from the interior of said shell to atmosphere, a valved outlet leading from saidshell, said vent and said outlet providingthe only exits from said shell, a valved supply line leading into said shell, a float chamber positioned within said shell, the volume of said float chamber being considerably less than the volume of said shell, a float positioned within said float chamber, said float being opena-tively linked to said valved supply line, siphon means connecting said chamber and said shell, means for ratifying the air in said siphon means to facilitate siphonic action, and an additional passage connecting said chamber with said shell.

3. In a flush tank, a shell having a valved outlet, a float actuated valved supply line extending into said shell, a float chamber positioned within;saidshell, a float positioned within said chamarttowhiohlthe devicelappertains. that numerous ber, said float, being. connected; tosaid: valved supply, line, siphon means, for filling said float chamber from-said shell when the water therein reachesv a predetermined, level, inlet actuated means; for, evacuating airfrom said siphon, a valved passageway extending fromsaidchamberinto said shell, said passageway being positioned near the bottom, of said chamber, said valved passageway providing means whereby; water is. prevented from. passing from the shell into the chamber but may passfrom the. chamber into the shelL, saidpassageway-being, disposed. to re-. tain asubstantial portion of the water within said-chamber, andmeansfor. manually operating, said valved outlet.

4-. A stack hung flush tank comprising a shell, a. valved supply'line. extending intosaid shell, a valved outlet extending from. said shell, a float chamber positioned within said shell, valved means. for, filling said shell, means. for filling said float chambenmeans for emptying said shell and a portionof said float chamber concurrently, said, filling and said emptying means comprising a. siphon and asecondpassage, and means for withdrawing air from said siphonto vfacilitate siphonicaction.

5 A stack hung flush. tank comprising a shell, a supply: line extending intosaid shell, afloat actuated valve connected to saidsupply line, the delivery portion of said. supply, line extending upwardly toapoint above said valve, the portion ofsupply pipe, above said valve being larger incross section than the. portion of pipeQbelow said,

valve, 2. portion. of the enlarged pipe. being ex-v panded, said, expanded, portion being depressed to form. a. sump, a plurality of, tubes, extending downwardly from said enlarged pipe, a. vent leading from the interior oi said shell toatmosphere, a valved dischargepassageway extending through thelbottom of said shell, said discharge p ssa eway including a pipe having a connection flange near the free end thereof to provide means for making atelescoped connection with an extension therefor, and manual means for operating said valved discharge passageway.

6. Inastack hung flush tank, a shell having a utility opening therein, a closure removably po,-.

sitioned over said opening and in watertight association with said shell, means. for securing said shell to a, stack, a valved supply, line extending upwardly intosaid shell, the valve in said supply line being positioned intermediate the top and bottom ends of said upwardly extending supply line, means for substantially reducing the pressure and the speed of flow of Water between the valve and the outlet end of thesupply without diminishing the volume of delivery into the shell,

a float chamber positioned within said shell, a float. per b positioned w in Said floa hem- .ber, said float being operably connected to said valved supply line, means for timing the starting of the filling of said. shell and said float chamber t ififer t i terv ls a va ed d h r e, a s a e d n r m said shell, m ans or dis ar ing the water from the floatchamber concurrently with the discharge of, water from the shell, and manually operated. meansfor, operating said valved discharge passageway. I

'7. In a flush tank, a substantially rectangular body, an inspection opening in one facev of said body, said opening being. above the normal water level of the device, a cover-removably positioned over said opening, a vent passageway extendin through the upper wall; ofsaid body, a valved outlet e tend n th u hhe o o f as qdy',

a cylindrical float chamber positioned within said body, a float guide extending upwardly from the floor of said float chamber, said guide functioning to limit the movement of a float associated therewith to vertical travel, a float operably po-.

, let, a valved supply extending into said shell, a

float chamber positioned Withinsaid shell, siphon means for filling said float chamber after the water in the shell reaches a predetermined level, and automatically operated valve means for allowing the water in the chamber to escape into the shell as the water in the shell is discharged.

9. In a flush tank, a shell, a utility opening in said shell, a closure positioned over said opening, a float chamber positioned within said shell, a valved discharge passageway near the bottom of said chamber, said passageway comprising an outwardly and thence upwardly turned tubular member, and siphon means for filling said float chamber. l

10. In a flush tank, a shell, a vent passageway extending from the interior of said shell to atmosphere, a valved supply line extending into said shell, a float chamber positioned within said shell,

means for filling said float chamber from said shell after the water therein reaches a predetermined level, a float positioned within said float chamber, said float being connected to operate said valved supply line, siphon means for discharging the water from said shell and said float chamber, and means for rarifying air in said siphon means to facilitate siphonic action.

11. In a flush tank, a shell, a vent passageway extending from the interior of said shell to atmosphere," a valved supply line extending into said shell, a float chamber positioned within said shell, adjustable means for filling said float chamber from said shell after the water therein reaches a given level within a predetermined adjustment range, a float positioned within said float chamber, said float being connected to operate said valved supply line, a siphon positioned within said shell, the discharge leg of said siphon being positioned to empty into a discharge passageway beneath said shell, a valve positioned in the discharge leg of said siphon, ineans for forming a water seal around said valve, and means connected with said siphon for emptying said float chamber. I

12. In a flush tank, a shell, a vent passageway extending from within said shell to atmosphere, a valved outlet positioned at the bottom of said shell, an adjustment and inspection opening in said shell, said opening being disposed to permit inspection and adjustment within the operably filled shell, a closure removably secured over said opening, a float chamber positioned within said shell, the area of said float chamber being considerably less than the area of said shell, a float positioned within said float chamber, a valved supply line extending into said shell, said supply line being operatively connected to said float, means for quickly filling said float chamber after the water in said shell reaches a predetermined level, and means for emptying said float chamber and said shell concurrently, said last named means comprising a siphon having an inlet leg disposed to feed from said shell and a second inlet leg disposed to feed from said float chamber.

13. In a flush tank, a shell having a valved outlet, -a valved supply line extending into said shell,

a float chamber positioned within said shell, a float operably positioned within said float chamber, said float being operably joined to said supvply line, siphon means for filling saidchamber after the water in said chamber reaches a level within a predetermined range, said last named means including supply line actuated means for evacuating the air from the upper portion of said siphon means.

14. In a flush tank, a shell having a valved outlet, a valved supply'line extending into said shell, a float chamber positioned within said shell, a float operably positioned within said float chamber, said float being operably joined to said supply .line, siphon means for filling said chamber after .the water in said chamber reaches a level within a predetermined range, said last named means including a sump in said supply line, a tube extending downwardly from said sump, a restriction in the intermediate portion of said tube, a second tube extending from the upper part of said siphon means to a point in said first named tube slightly below said restriction, said first and said second tubes providing means whereby gravitational flow of water through said first tube evacuates air from said siphon through said second tube thus activating said siphon.

15. A stack hung flush tank of the character described comprising, a shell, said shell being substantially rectangular in shape and having a utility opening formed in the front wall thereof closely adjacent the top of said shell, a closure member positioned over said opening and in fluid tight association with said shell, a hush box positioned on the bottom of said shell and forming a discharge therefor, overflow means extending from said hush box upwardly into said shell, the upper terminal ofsaid overflow being disposed to permit overflow from the shell to occur when the level of liquid in the shell is below the lower edge of said utility opening, a vent passageway 16. In a stack hung flush tank of the character described comprising, an enclosed shell having a front wall, a utility opening in said front wall, a closure removably positioned over said opening and in sealed engagement with said shell, means for venting said shell to a remote location,

i an outlet having a trap therein positioned at the bottom of said shell, automatically operated valved means for supplying said shell, overflow means extending from the interior of said shell to said outlet, the upper portion of said overflow means being disposed to permit removal of said closure and visual inspection of the interior of the shell during flushing and filling operation of said tank, and valved means for controlling flow from said shell.

VICTOR A. HOFFMANN.

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