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' April 20, 1937. £077,850 H. K. PAINTER CARBONATING APPARATUS ( Filed Jan. 6, 1933 \< 42%;” I ‘I ‘Nil. .I HL. m . ‘6 Sheets-Sheet 1 ' .il in. I IHIH I I @509. 1!! @105 371! .znli ‘?xca. M??mdw W a 9w!3/am“ "N”u 8r‘ April 20, 1937. ' H. K; PAINTER CARBONATING APPARATUS Filed Jan. e, 1935 2,077,850 ‘ ‘ ' 6 Sheets-Sheet 2 " April 20, 1937. H. K. PAINTER 2,077,850 CARBONATING APPARATUE Filed Jan. 6, 1933 E€3~5 I // / 6 Sheets-Sheet 3 if I Ill! /,','/,/,’//////1///1 //////////// ///// /////////////////// I .24 \ \ ////// Harrs IQ) Painter‘ Q1}; v :__~ TO R %r 356%” A540 ‘was. April 20, 1937. H. K. PAINTER 2,077,850 ' CARBONATING APPARATUS Filed Jan. 6, 1935 > 6 Sheets-Sheet 6 r / é § //// \ 1’WI? / y Hum-3:3 K‘?03.11. INVLNTOK MM Ba; M@/ ATTORNLZ? Patented Apr. 20, 1937 _ 2,077,850‘ UNITED STATES PATENT OFFICE 2,077,850 CARBONATI‘NG APPARATUS Harry K. Painter, Cincinnati, Ohio Application January 6, 1933, Serial No. 650,449 5 Glaims. (Cl. 261—19) This invention relates to the art of preparing drinks, and is particularly directed to apparatus for carbonating a ‘liquid. It is the object of this invention to provide an 5 improved apparatus of this character wherein a liquid level is maintained in a carbonated liquid supply tank and carbonic gas is constantly ad mitted thereto, in which apparatus a control means is incorporated causing agitation of the 10 water and gas whenever water is introduced into the tank resulting in efficient automatic impreg nation of the incoming liquid with gas as with drawals of carbonated liquid occur. I Figure 2 is a vertical sectional view, corre sponding substantially to the line 2‘—2 of Figures 1 and 3,- ‘ _ Figure 3 is a horizontal sectional View, corre 20 sponding substantially to the line 3-3 of Fig ure 2, Figure 4 is an enlarged fragmentary, front ele vational view, disclosing 'means for actuating the valve control means and agitating means, Figure 5 is an enlarged fragmentary, vertical sectional view, corresponding substantially to the 25 line 5-’5 of Figure 4, _ ‘ ‘ Figure 6 is an enlarged fragmentary, vertical sectional view, corresponding substantially to the ‘ 30 line B—6 of Figure 3, disclosing a safety valve, Figure 7 is an' enlarged fragmentary, vertical sectional view, disclosing a control means em bodied in this invention, Figure 8 is an enlarged fragmentary, vertical 35 sectional view,»corresponding substantially-to the line 8-8 of Figure '7, Figure 9 is an enlarged fragmentary, vertical sectional view, corresponding substantially to the line 9—9 of Figure 3, showing the apparatus in Figure, 10 is an enlarged fragmentary, vertical sectional view, corresponding substantially to the line 9—9 of Figure 3, showing the apparatus in another operative position, . Figure 11 is an enlarged vertical sectional view, . corresponding substantially to the line H-ll of Figure 10, Figure 12 is an enlarged vertical sectional view, corresponding substantially to the line l2-l2 of Figure 10, ' ' Figure 13 is an enlarged fragmentary, vertical sectional view, corresponding substantially to the line I3—I3 of Figure 3, 55 spondingsubstantially to the line |5-l5 of Fig ure 14, while - Figure 16 is a perspective view of a check valve embodied in the invention. - The embodiment of the invention herein dis closed comprises a rectangular base frame ill sup ported at its corners upon legs ii. The frame ill 10 supports a cabinet it having side walls l3 and it, a rear wall it, a front wall l6, and a cover rectangular metal ice-box 2i, spaced from the walls of the cabinet 92, and between the walls of the ice-box 2i and the walls of the cabinet i2 is ‘disposed insulating material 22 of cork, or the like, insulating the walls of the cabinet l2 from . (l the ice-box 2i, and the cover i ‘l is similarly insu lated therefrom. An adjustable supporting mem ber 23 is mounted on the bottom of the cabinet l2 and supports the cabinet H2 at its bottom mid section. I An aperture is provided in the bottom of the cabinet £12 for a conduit 24 leading from a source of water supply, connected to an elbow 25 thread ed to a conduit 26 which extends in close prox imity to the bottom 2?? of the ice-box 2i and to 0 the rear wall 28 of a carbonatcr tank 29 mount ed on the bottom 2i, for a purpose hereinafter described._ The conduit. 26 extends for several lengths, as indicated at 30, between the front wall 3i of the carbonator tank 29 and the front wall 32 of the ice-box 2i, and then extends upwardly adjacent the end Wall 33 of the carbonator tank 29, terminating in an elbow 34 threaded to a reduced conduit 35 Which extends downwardly in 40 one operative position, 45 . Figure 15 is a vertical sectional view, corre ll provided with a handle i8. The cover ii is hinged, as at it, to the rear wall l5. Disposed about the upper inner periphery of the cabinet 15 it? is a member 28 from which is suspended a a Figure 1 is a front elevational view of an em 15 bcdiment of the invention, corresponding substantially to the line l4—-l4 of Figure 4l, - Figure 14 is an enlarged vertical sectional view, a coil, as indicated at 36, between the rear Wall St of the carbonator tank 29 and the rear wall 38 of the ice-box 2i, and thence upwardly and transversely above the cover 39 of the carbonator tank 29, terminating in‘a valve casing ?ll. The conduits as arranged provide a lengthy passage for the water prior to its use, and the water is cooled to a low temperature by covering the con duit coil 36 with cracked ice or the like. The valve casing 40 (see Figure 4) is supported 50 by a bracket 4| mounted on the cover 39 and comprises a reduced port 42 (see Figure 14) com municating at one end with the conduit 35 and at the opposite end with a valve chamber 43, which communicates with a chamber 44 through 55 2 ' 2,077,850 ‘a reduced port 45, provided by a valve seat 48 engageable with a valve 41 threaded to the inner end of a reciprocating valve stem 48 extending through a gland nut 49 threaded in the valve 5 casing 48. 'Disposed about the valve stem 48 is cold water than if the water were mixed at nor mal temperature with the gas; furthermore, the gas is more completely absorbed by the cold water, thereby retaining the characteristics of carbonic gas in the water for a longer period of a packing member 58 secured by a nut 5| to time, than is obtained in the conventional method the gland nut 49 and valve stem 48. A conduit - of carbonating water. 52 has one end threaded to the valve casing, 48 One end of the shaft ‘I1 is adjustably secured and communicates with the chamber 44, and within one end of a sleeve-‘I9 (see Figure 14) by 10 the opposite end thereof is threaded into one means of a screw 88, and the sleeve 18 is rotat 10 end of a sleeve 58 having a reduced port 54. The ably mounted within a cup-shaped member 8|, of other end of the sleeve 58 has,_a reduced portion a fly-wheel construction 82. Secured to the 55 frictionally embraced by a soft rubber valve ?anged extremity of the cup-shaped‘ member 8|, 58 having a slotted collapsible opening 58a, which by means of screws 88, is a member 84, having 15 permits ?uid to pass therethrough from the con a projecting boss 85 inwardly threaded as at duit 52, but automatically prevents back-?ow 88, adapted to receive the threaded end 81 of of ?uid into the conduit 52'and its connected the sleeve ‘I8, and provided with a pin 88 extend conduit members. ‘ing transversely therefrom into the cup portion A coupling 51 is screw-threaded to the sleeve of the member 8|. The pin 88 is adapted to en 20 53 and embraces the one way valve 56 in spaced gage a stud 89 secured to the member 84. ' Adjacent the threaded portion 88in the boss relation, forming a chamber 58 thereabout, and the coupling 51 is'provided with a reduced port 85 is secured an outer ball race 98, and an inner 58 which communicates with a conduit 88 thread ball race 9I is secured to the end of "the valve ed into the other end of the coupling 51, and the stem 48 by a nut 92. Interposed between the 25 conduit 88 in turn communicates with the upper races 98 and 9| are balls 98 providing a ball bear portion of an agitator paddle housing 8i mounted ing arrangement which permit the fly-wheel 82 on the cover 39 of the carbonator tank 29 and to rotate freely about the sleeve ‘I8 and the valve communicating with the interior of the car stem 48, and prevent linear movement of the bonator tank 29, thereby providing conduit means fly-wheel 82 along the valve stem 48. The outer 30 traversing considerable distance with respect to end of the boss 85 is closed by a plate 94 dethe area of the ice-box 2I to convey water from tachably secured to the boss 85 by screws 95. the source of supply to the carbonator tank 29. When the shaft 11 is rotated to the left, as A carbonic gas conduit 82 (see Figure 7) has viewed in Figure 14, the sleeve ‘I9 also rotates one end connected to the source of carbonic gas to the left, but the fly-wheel 82 does not rotate, 35 supply, not shown, and the other end 88 ter due to its inertia. However, the threaded move minating in the carbonator tank 29 adjacent the ment of the sleeve ‘I9 in the ?y-wheel 82‘ causes bottom thereof beneath the agitator paddle hous linear movement of the ?y-wheel 82 to the left, ing 8|. A pressure valve (not shown) for regu which in turn moves the valve stem 48 to the left lating the pressure from the carbonic gas supply and opens the valve 41, permitting additional 40 is set to deliver a constant ?ow of gas at a water to enter the carbonator tank 29. The predetermined pressure; and ‘a gas check-valve threading movement of the sleeve ‘I9 to the left 84 is inserted in ‘the gas conduit 82 to prevent is limited by the pin 88 abutting the opposite back-?ow of gas from the carbonator tank 29 side of- the stud 88, as shown in broken lines in and permit entrance of the gas into the carbon— Figure 15, at which time the ?y-wheel' 82 is 45 ator tank 29. positively engaged and rotates to the left with Integral with the agitator paddle housing 8| is the sleeve ‘I9.’ When the shaft ‘I‘I ceases to ro-_ a ?ange 85 enclosing a boss 88, and the ?ange 85 tate the ?y-wheel 82 continues to rotate, due to is closed by a cover plate 81, thus providing a its inertia, and threads the ?y-wheel 82 on to gear box 88 adapted. to be ?lled with oil or ‘the sleeve ‘I8, causing linear movement of the 50 grease. Journaled in the boss 88 is a shaft 88 fly-wheel 82 to the right, which movement is carrying at one end an agitator paddle 18 se limited by the pin 88 abutting the stud 88, as cured thereto by a pin ‘II. The agitator paddle shown in solid lines in Figure 15. This latter ‘I8 is adapted to rotate within the housing 8| threaded advancement to the right, as viewed and is provided with vanes 12 curved at their in Figure 14, is su?icient to pull the valve stem 55 free ends, as at ‘I8. Fixed to the opposite end of 48 to the right and close the valve 41, preventing the shaft 89, bya pin ‘I4, is a worm-gear ‘I5 adapt ed to mesh with a worm-wheel ‘I8 secured to the midsection of a shaft 11 which extends through opposite sides of the ?ange 85. 60 - _ when rotative movement is imparted to the shaft 89, the agitator paddle 18‘ is rotated, and the curved vanes ‘I2 agitate the water and car bonic gas in the carbonator tank 29, causing the carbonic gas to permeate the water, producing a 65 carbonated water suitable for mixture with ?av— orlng syrups or for use unadulterated. Water traversing the water conduit means herein described is co'oled to a low tem , perature before entering the carbonator tank 70 29 and prior to coming into contact with the - carbonic gas. I find that with my method of preparing carbonated water by cooling the water prior to mixing with the carbonic gas and then agitating the water and gas in a cold state, that 75 a larger amount of gas can be absorbed by the 20 . 35 40 . water from flowing to the carbonator tank 28. , A motor 98 is mounted on a platform 81 and the shaft 88 of the motor 98 is connected to the end of the shaft 11. When the motor 88 is op erating, it imparts rotative movement to the 60 shaft 11 which in turn actuates the agitator pad dle ‘I8 and the valve stem 48, as hereinbefore described. 1 . An electrical circuit I88, not completely shown, includes a mercury switch IN, or other suitable switch means‘, enclosed in a sealed compartment I82 ?xed to the end wall 28 of the carbonator tank 28. The switch IN is provided with a lever arm I88 pivotally mounted, at about its mldsec tion, on the end wall 28, and the ‘lever arm I88 70 has at one end ?ngers I84, securing a sealed glass' tube I85 carrying at one end electrodes I88. In the tube I85 is a quantity of mercury which makes or breaks the circuit through the elec trodes I88, depending upon the inclination of the 75 3 . 2,077,850 tube I05 and the resultant location of the mere cury, either in or out of contact with the elec trodes I06. The opposite end of the lever arm I03 is provided with an elongated slot I01 in '5 which is inserted one end I08 of a ?oat rod I09 pivotally secured, as at IIO. This arm extends through a slot I I I in the wall 28 of the carbonator tank 29 and carries at its other end a ?oat II2 adapted to be moved in a vertical arcuate line by 10 the carbonated water in the carbonator tank 29. The cover 39 of the carbonator tank, 29 has an upwardly bulged portion I I3 to accommodate the ?oat H2. The bulged portion H3 is provided with an inwardly threaded boss I I4 for the re— 15 ception of a safety valve I I5. This valve includes a valve casing II6, a valve .seat In, a valve H8, outlets H9, and an adjustable pressure spring I42 is manipulated, a disk I45 threaded to one end of a valve rod I46 slidably mounted in the aper tures I31 and I3I. r The opposite end of the valve rod I46 is slid ably mounted in a partition wall I41 disposed short of the end I48 of the tubular member I2I. The valve rod I46 extends into the carbonator tank 29 and is adapted to engage a valve 30I pro vided with a valve disk I49 mounted on a plung er 300 having a stud I50 slidable within a recess I5I of a valve cap I52 threaded to the extreme end I48 of the tubular member I2I. The valve 30I is yieldably mounted by means of a spring I53 interposed between the valve cap I52 and the plunger 300. The valve cap I52 is provided with‘ annularly arranged ports I54, and the partition wall i4’! is provided with ports I55 to establish I20, permitting the valve II8 to be unseated at communication between the interior of the car a predetermined gas pressure within the car bonator tank 29 and the interior I56 of the tubu lar member I28. The flow of carbonated water from the carbonator tank 29 is controlled by the 20 bonator tank 29. _ The level of the water in the carbonator tank 29 controls the movement of the ?oat I I2. When the carbonated water supply is depleted to a pre determined level, the ?oat rod I09 automatically 25 actuates the switch lever arm I03 which is moved upwardly, as shown in broken lines in Figure 8, and the mercury tube I05 is inclined to contact , position with the electrodes I06 to close the cir cuit, causing the motor 96 to‘operate and rotate in faucet handle M2, which when rotated down wardly moves the valve rod “6 inwardly to open the ports 654 and permit the flow of carbonated water through the ports I55 and I30’ and thence from the discharge nozzle I33. The tubular member i2! has a ?at surface, as at 860, to support a cylinder “ii, of predeter mined capacity, having a tapered port l62, adapt 30 the agitator paddle ‘I0 and to open the valve 41 ed to serve as a valve seat alined with an aperture 30 l63 irrfthe ?at surface 560. Secured within the to permit additional water to enter vthe car bonator tank 29 and simultaneously agitate the alined apertures 862 and i163 is a valve cage 364, incoming water with the incoming carbonic gas its lower end partially closed by a spider member to produce carbonated water at a predetermined, i65 adapted to support a spring 200 which yield 35 pressure. When the elevation of the carbonated ably supports a ball valve M51 in sealing engage~ 35 water in the carbonator tank 29 has increased to ment with the valve seat 962. Reciprocally mounted within the cylinder 1161i a predetermined height, the ?oat H2 and rod I09 automatically move the mercury tube I03 to is a piston 868 having a port I69 extending there the oppositely inclined position, to break the through, one end of which is partially closed by a spider member (I10, and the other end of which is 40 40 circuit and cause the motor 96 to cease its op erations, and the agitator paddle ‘I0 its rotation, provided with a valve seat iii adapted to be en and to close the valve 41, cutting off additional gaged by a ball valve i712 yieldably supported by a spring Hi3 interposed between the ball valve ?ow of water into the carbonator tank 29. A tubular member i2l (see Figures 9 and 10) _ H2 and the spider member H9. The ends of the piston 568 are provided with packing members 45 has one end I22 threaded into the front wall 86 H4 and H5, and washers H6 and ill. The pack of the carbonator tank 29 and is secured in sealing relation therewith by a gasket and nut ing member HM and washer 516 have openings connection, as indicated at I23, and the other end that are alined with the port “59, and are secured I24 of the tubular member I2I is provided with to one face of the piston 968 between a shoul 50 an annular flange 525 which abuts the inner dered portion of a piston rod H9 which has one surface of the front wall 32 of the ice~box 2i, end threaded into the piston M9. we piston rod i‘lii extends through a stui?ng box H9 carried and is secured thereto by a nut i271 threaded onto the end‘ 824 of the tubular member i726. by a head I189 secured to the forward end of the cylinder i6l. The outer end of the piston rod , The tubular member has an outwardly tapered H8 is pivotally connected, as at I8I, to a link i82 pivotally secured to the faucet handle “2, as at H83. The packing M5 and washer iii are also an integral partition having a plurality of an- . provided with openings that are alined with the nularly arranged apertures I30 which surround port 669. These elements are secured to the opposite face or" the piston it?» by a screw i199 60 60 a central aperture I3I. The apertures E30 com ' municate with an enlarged chamber £532 of the threaded thereinto. The cylinder list is closed at its rear end by a , faucet I29 which communicates with 9. depending discharge nozzle I33. The forward end portion head l85 having an outwardly and upwardly of the faucet I29 is provided with a chamber [134 extending projection 596 provided with an angu 65 closed at its outer end by a detachable cap 035 lar bore 881? communicating with the cylinder threaded into the faucet I29. The chamber M4 MI. The lower end of the bore I 8i, is provided is closed at its inner end by a partition wall use with a valve seat E89 for ‘t ball valve i90 yield 55 inner surface adapted to frictionally embrace a corresponding tapered inner end I28 of a faucet M9. The tapered end I28 is partially closed by ‘ having an aperture I31, for a purpose hereinafter described. Extending through the chamber 834 70 is'afpin I38 journaled in diametrically disposed lugs I39. The pin I38 is rigidly affixed, by means of a screw I40, to the‘ bifurcated arms I4I of a faucet handle I42, and secured to the pin l38, within the chamber I34, by a screw I43, is a cam 75 I44, adapted to engage, when the faucethandle ably held in position by a spring i9I removably secured by a spider‘ member I92 af?xed at the inner end of the bore I91. The outer end of the 70 bore- i8‘! is outwardly and upwardly tapered to frictionally accommodate a correspondingly ta pered ?exible member l93 secured to a nipple 594 abutting against the bottom-of a syrup container I95 and secured thereto by "acollar I96. The 75 4 8,077,850 syrup container I95 is supported in the bore I01, and is easily removed from the cabinet I 2 by lift ing it upwardly from the bore I81. Additional syrup may be added to the container I95 by re 5 moving a detachable plug I91. In operation, assuming that the apparatus is in the position as shown in Figure 9, and the cylinder I5I has not been supplied with ?avoring syrup from the syrup container I 95, the faucet l0 handle I42 is rotated forwardly, which movement unseats the valve I90 and causes the elements associated therewith to assume the position as shown in Figure 10, creating a partial vacuum in the cylinder IGI, causing syrup to flow from 200, terminating in a pipe 205 having one end threaded to the end of the faucet 204 and the other end terminating within the carbonator tank 29 in direct communication with the car bonated water therein. The inner end of the faucet 204 is secured to the inner [surface of the front wall of the ice-box 2I by a gasket and nut arrangement as indicated at 2I0. The inner end of the pipe 208 is secured to the carbonator tank 29 by a gasket and nut arrangement as 10 shown at 2i I. ' When the faucet handle 205 is moved for wardly, the carbonated water is dispensed with considerable force through the reduced outlet 205, the force of the ejection being su?icient to 15 the container I95 into the rear part of the cylin der I5I. The faucet handle I42 is then rotated disintegrate ice-cream, and to completely mix to its original and normal position, as indicated ?avored syrups with the carbonated water. A in Figure 9, which movement seats the valve I90 tray 2i 2 is secured to the frame I0, to support and prevents further discharge of syrup from glasses, or the like, during the dispensing opera 20 the container I95, and unseats the valve I12, per tions. mitting the charge of syrup in the rear of the It will be understood by those skilled in the cylinder I5I to flow through the port I59 and the art that the embodiment herein disclosed ac piston I50 to the front end of the cylinder I6I, complishes at least the principal object of the vwhere the syrup is held by the valve I61. The ‘invention, that it has uses and advantages other 25 faucet handle I42 is again rotated downwardly ‘~. than those herein particularly referred to, and and the piston I58 moved forwardly, which move that various changes and'modi?cations may be ment seats the valve I12 to prevent further flow made without departing from the spirit of the of syrup therepast, but unseats the valve I61, invention, and accordingly the embodiment dis forcing the'charge of syrup in the front end of closed herein is illustrative onlyand the inven 30 the cylinder I50 into the mixing chamber I55. tion is not limited thereto. 30 Each rearward movement of the faucet handle I claim: ‘ . I42 thereafter forces a new charge of syrup from 1. A device of the character described, com the container I95, into the forward portion of prising: a container communicable with a liquid the cylinder I5I, so that only one downward supply and a gas supply; means for mixing said 35 movement is necessary to force the new charge liquid and gas to impregnate said liquid with of syrup into the mixing chamber I56. During said gas; valve means for controlling the ?ow the forward movement of the faucet handle I42, of said liquid; and a valve actuating element the carbonator valve IN is unseated by the cam driven by said mixing means and having an I44 and valve rod I46, to permit the'carbonated inertia member connected with said valve means, 40 water to pass through the small apertures I55 movable with said actuating element when the 40 under pressure exerted by the carbonic gas con latter is moving and shiftable relative to said tained in the carbonated water and the gas above actuating element when the latter comes to rest‘ the water in the tank 29, into the mixing cham to operate said valve means. ber I55, whereby the charge of syrup is intimate 2. A device of the character described, com 45 ly mixed under pressure of the gas with the car bonated water and forced through the apertures I20, and thence forced through the discharge nomle I22 in’ the form of a beverage already prepared for consumption. 50 ing said gas and liquid, impregnating said liquid with said gas; and valve means for controlling the The dispensing apparatus thus described re-' ?ow of said liquid to said container; actuating so means for operating said valve and agitating quires but a forward and rearward movement of the faucet handle I42 to dispense a carbonated ?avored beverage. The charges of syrup from the cylinder I6I can be altered by inserting cyl 55 inders of various capacities.. . ' It is apparent that one or more dispensing and mixing units can be used in connection with the same cabinet, and carbonating tank. I have shown in this embodiment of my invention three "60 dispensing and mixing units 200, 20I and 202 in addition to the dispensing and mixing unit hereinbefore described, and the units 200, 2III, and 202 are constructed identically and operate identically with the unit heretofore described. 05' prising: a container communicable with a liquid 45 supply and a gas supply; means disposed in said container for agitating said liquid and gas, mix I have also made provision for dispensing un adulterated carbonated water directly from the carbonator tank 20. The mechanism employed in that connection comprises a dispensing unit 202 having a faucet 204 disposed between the 70 units 200 and 20I and threaded to the front wall of the cabinet I2, and is providedwith a suitable valve 220 operated in the usual manner by a'faucet handle 205. The faucet 204 has a reduced outlet 206 in a depending nozzle 201 75 which communicates with an enlarged channel means; said ‘valve means and said agitating means being interconnected with said actuating means, whereby said valve is opened when said agitator means is operated. 3. A device of the character described, com 55 prising: a container communicable with a liquid supply and a gas supply; means for mixing said liquid and gas, impregnating said liquid with said gas; valve means for controlling the ?ow of said liquid; and means for actuating the valve and driving the mixing means, including a single direction rotary element and a translat able element carrying the valve actuated by the 'rotary element for effecting both opening and 65 closing movements of said valve means. 4. A device of ‘the character described, com prising: a container communicable with a liquid supply and a gas supply; means for mixing said liquid and gas, impregnating said liquid with said 70 gas: valve means reciprocably operable to con trol the ?ow of said liquid; and means for ac tuating the valve and driving the mixing means including a rotary element engaging said recipro cal valve means, said rotary element movable in 75 2,077,850 5 one direction to effect reciprocatory movement vice for said power means operated by the rise of said valve means. 5. An apparatus of the class described, com= raising, a container communicable with a ~sulp ply of water under pressure and a carbonic gas supply under pressure, an agitator for mixing the water and. gas in said container, 9. power and fall of water in said container, a valve means for the water supply, and an operating means between the power means and said valve means means for driving said agitator, a control, de for opening the valve upon the starting of the power means and closing the valve upon the stopping of the powermeans. > HARRY K. PAINTER.