US878225A

US878225A - Pasteurizer.

Info

Publication number: US878225A
Application number: US16902403A
Authority: US
Inventors: John C Miller
Original assignee: MILLER PASTEURIZING MACHINE Co
Current assignee: MILLER PASTEURIZING MACHINE Co
Priority date: 1903-08-10
Filing date: 1903-08-10
Publication date: 1908-02-04
Anticipated expiration: 1925-02-04

Description

PATENTED FEB. 4, 1908.- J. C. MILLER.

PASTEURIZBR.

ATION FILED AUG.'10. 190s.

4 SHEETS-SHEET l.

APPLIC No. 878,225. PATENTED FEB. 4, 1908. J. C. MILLER.

PASTEURIZER.

APPLICATION FILED AUG.10, 190s. N

4 SHEETS-SHEET 2.

PATENTED PEB. 4, 1908.

J.. C. MILLER. PASTEURIZER.

APPLICATION FILED AUG. 1o. 1903.

4 SHEETS-SHEET 3.

No. 878,225. PATENTED PEB. 4, 1908. J. C. MILLER.

PASTEURIZER.

APPLICATION FILED AUG.10. 1903.

4 SHEETS-SHEET 4.

IVTNESSES M @ff-ML- Al/anlzfy tion of the rotary inner vessel. enlarged vertical sectional view of a portion 'devices in their relation to each other.

UNITED STATES PATENT OFFICE.

.IOHN C. MILLER, OF CANTON, OHIO, ASSIGNOR TO THE MILLER PASTEURIZING MACHINE COMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

PASTEURIZER.

Specification of Letters Patent.

Patented Feb. 4, 190s.

To all whom it may concern:

Be it known that I, JOHN C. MILLER, a citizen of the United States, residing at Canton, in the county oi Stark and State of Ohio, have invented certain new and useful Im rovements in Pasteurizers, of which the fol owing is a speciiication, reference being hadv therein to the accompanying drawing.

This invention relates to an improved a paratus for treating milk and other liqui s, pertaining more particularly to apparatus by which bacteria or similar organisms are destroyed by iirst heating the milk and then cooling it.

Figure 1 is a side elevation of a mechanism embodying my improvements. Fig. 2 is a section showing the several parts or sets of Fig. 3 is a plan view of the apparatus. Fig. 1 is an enlarged section of the parts of the heater shown separately. Fig. 5 is a Fig. 6 is a side elevation of the injector part of the Water circulating devices, Fig. 7 is a side view oi the inlet ducts lfor steam 'for the outer water chamber. Fig. 8 is a verti-4 cal section of one of the cooling devices. Fig. 9 is a side elevation of the exterior cooling vessel in Fig. 8. Fig. 10 is a side eleva- Fig. 11 is an of the lower end of a cooler showing a modiiied form ofconnection for the driving shaf t. Fig. 12 shows in side elevation the four sections of corrugated metal 'from which the cooling coils are formed. ,Fig. 13 is a cross section of the cooling coil, and Fig. i111 is a vertical section of the same.

I provide a framework with a su porting bed 1, having a series of steps or

p atforms

2, 3, 4 and .annpright frame section at. the end as at 5. l

A indicates the heating apparatus. as a whole, B the preliminary cooler and C the final cooler in which the milk is reduced to a tem erature relatively very low. These severaA parts are so arranged as to respectively hold bodies or columns of milk, the

body in B having its top level lower than that in the heating mechanism atA, and the body in'C in turn having a level lower than that in the devices at B. l

At D is supported on the 'framework the initial holder or receptacle for the milk, this holding it at a level somewhat above that in the. heating mechanism at A.

The heater is constructed in such Way as to provide an outer water holding chamber 6, and an'inner water holding chamber 7, these being so arranged that the outer Wall of the latter and the innerwall of the chamber 6 form an exceedingly reduced passageway 8 for the milk that is to be treated. Preferably I provide these chambers and the assageway by 'forming three cylinders 9, 10 and 11. 9 can be a wooden vat or tub, and in order to prevent loss of heat it is generally so made. The cylinder at 10 is of sheet metal and is 'formed with a bottom' 12 which is preferably concave-convex as shown. This bottom at its edge is secured li uid tight to the lower edge oi: the wall 10 of libe outer vessel. At its center it is secured to a tube or sleeve 13. This sleeve extends downward and at its lower end is rigidly mounted in and tightly -fastened to the bottom 14 of the exterior vessel. To thus secure it, it is fastened to a sleeve 15 which is fitted in an aperture in the bottom andhas a boss 16 secured to the sleeve 13. 17 'indicates a gland or stutling box provided with packing and a screw vfor preventing liquid from escaping around vthe shaft.

At 1S there is a shoulder on the sleeve 15 fitting the inner surface of the bottom wall 14 and at 19 there is an annular nut engaging with a 'thread on the sleeve 15 for tightl binding the parts 4to the bottom wall 14 wit a liquid tight union.

At 20 there is a step cavity wherein the inner rotary vessel has bearing, as will be described.v

At the upper end the cylinder 8 is 'fastened in position and centered with respedt to the outer Walls 9 and 10 by means of bracing bars 21 'which are bolted or screwed to the Wall 9 and extending inward to the cylinder or wall 10. 22 indicates a trough which is secured to or formedat the up' er edge of the cylinder Wall 10 and is adapte to collect the milk which overllows from the milk passage and conduct it' to the place of exit. The

brace bars 21 are 'formed with ears or lugs23 which are'itted to the trough and support it and assist in b'racing 'firmly the cylinder 8.

The inner Water holding chamber Tis provided by means of a 'vessel indicated as a Whole by 24. It has a wall or cylinder 11 and a bottom 26'. The latter is concave-convex and shaped so as to be approximately parallel to the bottom wall or diaphragm 120i the other vessel. At its u ppcr end this inner vesis fitted to the step cavity 20, above de-- scribed, in the stationary bearing sleeve 13. The shaft extends to points above the vessels and is mounted in a bearing at 33 which is carried .by carrying and bracing arms 34 which are bent downward and detachably secured to the outer vessel, preferably by' having quickly detachable fastening devices for joining them to the brace bars 21.

' 35 is a water inlet conductor in the form of a large tube secured to and concentric with they shaft 31 and having at its upper end afunnel y36. The water delivered to the funnel 36 passes through the pipe 35 and escapes at the oriiice 37 into the inner water chamber 7. 33y is the driving shaft section. It is mounted in the tubular or sleeve bearing 13 at its upper endend at its lower end is seated in a bearing. 40. It carries a bevel wheel 39 which meshes with the pinion 41 on the main driving shaft 42. The shaft is mounted in the base frame 1 and extends below the severalsets of operative devices, A, B, C, and is adapted to impart power simultaneously to the movable parts of each. At 43 it is provided with a fast pulley and a loose pulley and with it is connected a belt which can be moved from one ulley to the other when power is to be app ied. y

In order to maintain uniformity of temperature in the two water chambers 6, and 7 f produce a circulation of water between them by means of steam of constant pressure and temperature. 44 is a steam pipe extending trom a boller, the passage of steam therein being controlled by a valve at 45. At the bottom it is rovided'with a nozzle 46 which is iitted into the wall of the chamber 47 connected to a pipe 43 which is extended around thev bottom of the outer water chamber 6 in a form ap-' proxi'nately circular. The chamber at 47 is ap roxi natelj-r globe-like in form and is, rovi ed lwithl a series of apertures 49. hen

.steam yis permitted to enter through the nozzle at 46 it tends to pass around the duct 48 and at the same time violently suck in streams of waterthroughthe apertures 49 and drive them simultaneously through the pipe. At 50 another steam inlet pipe is shown which also extends downward to points near the bottom of the outer chamber 6, and is provided with a control valve 51.

lt hasja nozzle at 52 which is fitted'into the wall of a globe like chamber at 53 having apertures 54 similar to those above described. This is connected to the lower end of an up- 'take pipe 55 which, at the top, hasan inwardly curved portion 56 adapted to deliver water to the interior water'chamber at 7.

When steam is admitted through the pipe 44 it heats and causes circulation of the water in theouter chamber 6, and if, at the same time, the steam is entering through the pipe or through the injector devices at 52, 54, causes the forcible movement upward of water from the outer chamber, which water passes over into the inner chamber 7. When this chamber becomes filled to the top of the rim at 26a any additional water that is delivered to it will cause an overflow from this rim into the outer chamber 6. The steam acts` as a heating agency and also as a water elevating agency in the

pipes

55, 56. The

water of condensation beinggrelatively incon-A to the outer chamber produces atemperature throughout the t'wo bodies of water which is ractically uniform and constant.

The milk is delivered .from the receptacle at D to the spaceor passageway 8 through the valve control duct 57, the funnel 58, the vertical pipe 59 and the inlet pipe 60. The head or level of the liquid in the tank Dis somewhat above that in the funnel at 58,

and the level in the latter" can be kept slightly above that in the space or passageway 8.

The inner wall 11 being close to the adjacent one at 10,it, when rotated by they devices above described, acts to prevent the coagulation ofthe milk g this resulting also from the fact that by the means set forth the temperature ofthe walls or sheets of metal are substantially alike, one on one side of the thin sheet of metal and the other on the other. The filaments or membranes of coagulation that tend to form are immediately broken. Toy increase the efficiency of the parts in this res ect, and also to assist in' causing the mil to iiow r idly upward through the reduced passage, emplo a helically arranged rib 61 secured referab y to the outer face of the inner vesse This is in. or nearly in contact at all points with the wall 10 of the outer vessel. Hence, ythe outer surface of the pathway is rapidly traversed by the rib, and while the whipping or violent agitation of the milk is prevented (such as is secured by the beaters or agitating blades some times employed) there is a prevention of the adhere ence of the milk particles to the surface.

`Again, the helically arranged rib assures that there shall be a great prolongation of the pathway through which the milk must travel, although vitstotal rise from the v,bottom to the top of the mechanism is limited. Through this elongated Apassage it rises rapidly and the heatingl is speedily effected and with' uniformity, as above described. The mechanism indicated as an entirety' by B also erably of wood, and an inner wall 73 of sheet metal arranged closely adjacentl to the wall 64 of the inner vessel. yAt the upper edge of this inner Wall 73 of the outer vessel there is a collecting trough 74 into which the milk can run which rises in the reduced passageway 75 between the walls 64 and 73.i

At 76 there is an escape duct for the milk which has collected in the trough.

The metallic parts of the outer and inner vessels are illustrated detached in Figs. 9 and 10,. in side view. The outer water chamber 62 in this case is in the form of a helical passage way. To provide it, sheets of metal are subjected to a pressing action vfor the purpose of forming therein sections of helical grooves 78. After they have been pressed the sections are placed together in such a Way as to surround the cylindrical wall 73 and they are tightly and continuously fastened thereto by solder or otherwise. The corresponding groove sections are arranged soas to register and when the arts have all been fastened togetherthere 1s provided a continuous helical passageway as aforesaid and indicated by 62. The sections of this water jacket are shown in Fig.

l12. The inwardly pressed helically grooved A parts are provided with rows of perforations, as shown atI 78a. After the 'acket sections are put in place, as above escribed, they `may be fastened by introducing solder through these rows of small perforations, the

solder binding together the two shee-ts ofmetal, as shown at 78", Figs. 13 and 14. 79 is an inlet duct or pipe, whifch communicates with the top convolution of this helical passageway and supplies the cooling medium thereto.

80 is the withdrawing d uct.; 81 isa vertical conductor whichcarries the water upward to the escape duct.

82 is a trough or receptacle at the upper end of the wall 73 extending to points outside of and lying below the metallic trough 74. -When water is fed to the inner 'chamber 63 through the funnel 71, and the pi e 70,' it escapes from thc pipe at the ori ice 7(). The water descends from the refrigerator or 'cooler through the pipe 84.

85 is a connection between the ipe 84 and the duct 79; 86 being a valve or conF trolling the flow of water through it.

87 is a pipe carriedinward from that at l84 The water that enters the bottom of the inner chamber 63 rises. to the top thereof and Thus the streams of water,`

the one that has passed downward lthrou h the outer cooling chamber or helical pat and that which flows over from the inner chamber are both. received in the trough 82 and escape" through the duct 83. The outer vessel of this part of the mechanism has a bottom 73Ll of sheet metal concavoeconvex in form, and is` secured to the wall 73. At its center it is secured to a metallic bearing piece 7 3b, having a step socket 73c to receive the wearing piece 69 secured to the lower end of the shaft 67. There is a short sleeve89 projecting down from the bearing and rovided with a packing 89a. The driving s aft section 9() in this case at its lower end mounted in a step' 91 and has secured to it a bevel wheel 92 engaging with a bevel pinion 93 on the aforesaid shaft 42. l

TheV ,milk which flows from the` heating mechanism is carried through the duct 94 t0 the'funnel 95 which delivers the milk to a vertical pipe 96, the latter in turn delivering v it to the horizontal inlet 97 which communicates with the reduced space or passageway 7 5 between the inner and outer cooling ves-v with their respective rotary vessels above This connection is provided by forming'eachshaft section with a square upperthem.

end adapted to fit into a corresponding shaft socket in the bearing

head

69 or 32. By having the train of rotary vessels situated above the power shaft and so constructed as to be readily detached therefrom, I provide for taking the parts apart for cleansing, manipulating and again assembling them entirely independently of the power mechanism, which latter can be left in permanent position, 4the mechanism in vthis respect being superior to those which 1 have heretofore employed, such as shown in my patent, No. 678,892 of' July 23, 190i. With my earlier` machines referredv to, the gearing, shafting and ,the framework which supported them were arranged above they operative parts of. the apparatus, and the separating of rthe cylinders from each other, or the removal of one of the parts, could be accomj dercan'at any time be withdrawn, the only part to be loosened in either case being' the simple bracket bar or spider at the top, andafter the removal thereof the vertical space above the fixed vessels is unencumbered and vessels of even the largest size can be readily liftedout and replaced.;

As will be more fully set iorth below, the

' object aimed at with that part of the aparatus so far described is'to effect the 'uni crm and sudden heating of the milk to` aV relatively high degree, and to immediately thereafter as the milk iiows in a continuous stream as suddenly and uniformly lower its temperature. This I have foundcan be accomplished by the use oi water .of ordinary temperature, such as can be readily obtained even in warm weather. or can'be obtained without any expensive use of refrigerating material. For instance, if the heating is carried .in the apparatus at A up to 160 degrees and is by the apparatus `at D 1. In an apparatus suddenly and'uniformly reduced to, say, 70

degrees, I have -found that the pasteurizing can loe-thoroughly accomplished7 and this re'ady'withdrawal of the heat can be accome plished without the Vem loyment ci ice or expensive refrigerante. ut after this pasteurizing has beenl accomplished, I iind it is desirable in many cases to still further lower the temperature of the milk, and for this urpose I'can with economemploya rerigerant .of the nature oi coo ing brine and I apply it by means of the third set of devices il ustrated as an entirety by C.

iThis apparatus can, as concerns most of its details, be regarded as similar to that illustrated at B, there being an inner vessel and an outer vessel for holding the cooling li uid, having ahelical passageway with an inlet and outlet similar to that above described. In ,this case, however, because of ,the cooler brine it is not necessary to4 have 'l the inner body of cooling liquid. The brine or reirigerating fluid is admitted to the inlet at 100, passes downward around the milk passage-101, following the helical conduit At 103 there and escapes at the'outlet 102. is a pum connected with the outlet 10,24 by means o a duct 104 having a valve 105. The pump draws the brine out at the bottom of the interior passage and forces it'into the vat 106, and from the latter it flows downward through the pipe 107 to again'enter through the inlet 100, its assage through the latter ipe being control ed by the valve atv108. `With these exceptions I prefer to make this Abrine cooler at C substantially similar to that at B, above described. When so made it becomes possible, if the operator dotted lines in Fig. 1.

so wishes, to modify the treatment of the milk if occasion shouldvdemand. Thus he can carry it, Vii required, directly from the heater to the brine cooler by connecting the outlet 94 across to the Jfeed funnel 95, as indicated by dotted lines in Fig. 3; 0r, again, he can prolong the cooling 'treatment by water, if found desirable, by cutting oli lthe connection with the brine vat and pump and making connections between the inner water vessel and the outer water vessel at C, and

the source .of water which supplies the apparatus at B, these connections being similar to those at 84, 85, 87, etc., and shown in When itl is desiredto remove the yinner cylinder of the heater A, the

pipe systems

45 and 50 may be detached respectively at the .connections 44a and 50a. 'By removing the s ider or bracket 44, the inner cylinder may tiien be readily removed, In order toremove the inner cylinders of the coolers in whi h water is used, it will be understood tha all that will be necessary is to swing the pipe 87 o ut `of thel way`and 'to remove the bracket or s' ider 98.

What I c aim is z-f for treating milk and other liquids, the combination of a frameha heating mechanism hav-'ing two. concentric vessels, of which one rotates relatively to the other, means for supplying a heating agent to each of the said vessels, a tank supplying milk to said receptacle and adapted to hold a body thereof higher than that of said heat' king mechanism, a cooling mechanism adaptl ed to hold the milk after 1t leaves the heating vmechanism at a level lower than the level of the milk in the heating mechanism and comrising two concentric vessels adapted to old bodies of a cooling medium and of which vessels one is rotatable relatively to the other,a power mechanism below the said heating mechanism and cooling mechanism, two trains of devices for connecting the rotary vessels respectively in the heating andcooling mechanisms with power mechanism, and conductors for conveying milk or other liquid from the heating mechanism to the coolingl mechanism, substantially as set forth. 4

2. In an ap aratus for treating milk or other liquids, t e combination of a supporting frame, a heating mechanism havmg a stationary 4external vessel and anV inner rotary vessel, the adjacent walls of which vessels form a reduced passageway around the inner vesselfor'the milk, a cooling mechanism having a stationary outer vessel and a rotary inner vessel, the adjacent walls vor which form a reduced passagewayfor the cooling of the milk, a rotary vertical power shaft passing through the bottom of :the outer vessel of the heating mechanism and detachably connected with the inner rotary vessel, a vertically arranged power shaft passin through the bottom of the outer vessel of t e cooling mechanism and detachably connected with the inner rotary cooling vesed, an inner rotary vessel holding abody of` water inside of the said milk passageway andsel, power devices below the. heating mechnismand the'cooling mechanism' and con-- nected to both of said vertical shafts, substantially as set forth.

3.Y In an apparatus for treating milk and other liquids, the combination of a frame, a

stationary vessel mounted on said frame and.

adapted to hold a body of water around the passageway for the milk which is being treatcut oil from the body of water in said stationa vessel, a driving shaft mounted infiXed re ations to the outer vessel .and below the inner rotary vessel, said inner rotary vessel being arranged itc be dette-hed upwardly from said shaft and to be lifted out from the exterior vessell independently oi' the said shaft, and the power' transmitting devices vbelow the inner rotary vessel for driving said shaft, substantially as set forth.

4. In an apparatus for treating milk and other liquids, the combination of an inner rotary vessel adapted to hold a body of water, an outer chamber having an inner cylindrical wall 73 and an outer .wall formed with a helicall groove '78 extending continuously from the top to the bottom, said outer wall being secured to the inner and forming -l a continuous helical passageway for liquid,

- call substantially as set forth.

5.- In an apparatus for treating milk and other liquids, a metallic heat-conducting wall with whichthe milk or liquid to be treated `table wall, av tank supplying milk to said heating mechanism and adapted to hold a body of milk'at a level higher than the level of the milk in said heating mechanism, a

' cooling mechanism adapted to hold the milk after it leaves the heating mechanism at a level ,lower than the level of the milk in the heating mechanism, said cooling mechanism ',havingqa rotatable treating Wall over'which the. said milk is spread and travels in a relatively thin or attenuated stream, power mechanism arranged beneath the said rotary.

walls of the said heating and cooling mechanisms, two trains of power transmitting devices for connecting the rotatable treating walls, respectively, of the heating and cooling mechanisms to said power mechanism, and means for conveying. milk or other li uid from said heating mechanism to the coo ing mechanism.

7. In an apparatus for treating milk or t other liquids, the combination of `a heating mechanism having a rotatable treating wall over which the milk is spread and .travels inr a relatively attenuated stream or film, a preliminary cooling mechanism arranged to receive the heated milk immediately -upon its leavingthe said heating mechanism and to hold it at a level lower than the level of the milk in the said heating mechanism, said preliminary cooling mechanism having a rotatable treating Wall over which thel milk is spread andv travels in a relatively thin or attenuated'stream or film, a' final coolingk mechanism arranged to receive the milk immediateliT upon its leaving the said preliminary cooling mechanism and to hold it at a level lower than the level of the milk in the said preliminary cooling mechanism, said final coolin mechanism having a' rotatable treating wa lover which the milk is spread and travels in a relatively thinor attenuated stream or iilm, a suitable frame supporting said heating, preliminary cooling, and final cooling mechanisms, power mechanism mounted in said frame beneath said rotatable Y milk treating walls, and three trains of power transmitting devices for connecting they said rotatable treating walls, respectively, of the heatin the preliminary cooling, and the final coo ing mechanisms to said power mechanism.

8. In an apparatus for treating milk or other liquids, the combination of a heating mechanismuhaving a rotatable milk-treating wall over which the milk is spread and travels in a relatively attenuated stream or' film, means for suddenly and substantiallyv uniformly heating all of the particles of said milk while it is so traveling over said rota# table wall, a tank supplying milk to said heating mechanism and adapted to hold a bodyA of milk at a level higher than the level vof the milk in said heating mechanism, a preliminary cooling mechanism arranged to `receive the heated milk immediately upon its leaving the said heating mechanismI andto hold said milk at a level lower than the level of the milk in said heating mechanism, said cooling mechanism having a rotatable treating wall 'over which the milk is spread and travels in a relatively thin or -attenuated stream or film,vmeans for causing water to contact with said rotatable treating wall and cool it, a final cooling mechanism arranged to receive the milk immediately uponits leaving the said preliminary cooling mechanism and to' hold it at a level lower than the l level of the milk in said preliminary cooling mechanism, said final cooling mechanism having a treating wall along one surface of which the milk is arranged to travel in a relatively thin or attenuated stream or iilm,

'means for causing brine to ilow in cntact other liquid from said preliminary cooling mechanism to said inal cooling mechanism, power mechanism arranged" beneath the rotatable treating walls of said heating and ,cooling mechanisms with which the milk iiows in contact, and two trains of power transmitting devices forconnecting therotatahle treating walls, respectively,oi the heating and therpreliminary. cooling mechanisms to said power mechanism.

9., in' an apparatus for treating milk or dther liquids, the`combination of a heating mechanism having a rotatable milk-treating wall over which the milk is spread and travels in a relatively attenuated stream or iilm, means for suddenly and substantially uniformly heating all of the particles of said` milk while'it is so traveling over said rotatable treating wall, a water cooled mechanism arranged to receive the said heated milk immediately upon its leaving the said heating mechanism and to hold said milk at a level lower than the level of the milk in said heating mechanism, said water cooled mechanism having a rotatable treating wall over which the milk is s read and travels in a relatively attenuate -stream or film, means for conducting water to and 4from said rotatable treating wall to suddenly and rapidly cool all oi' the particles of said milk while they are traveling over it, a brine cooled mechanism arran ed to receive the said milk immediately upon its leaving the said water cooled mechanism and to hold it at a level lower than the level of the milk in said water cooled mechanism, said brine cooled mechanism having a rotatable treating wall overl which the said milk is spread and travels in' a relatively thin or attenuated stream or iilm, means for conducting brine to and from and for circulating it in the said brine cooled mechanism to reduce the temperature of all of the particles of the said milk while they arel traveling over the said rotatable treating wall therein, a' suitable frame supporting said heating, water cooled mechanism, and brine cooled mechanism, power mechanism mounted upon said frame and arranged beneath the said rotatable treating walls of said heating and cooling mechanisms, three trains of power transmitting devices for connectin the rotatable treating walls, respectively, o

'the heating, the water cooled, and the brine -r cooled mechanism to the said power mechanism, means for conducting milk orv other liquid from said heating to said water cooled mechanism, and means for conductin milk or other liquid from said water coo ed to said brine cooled mechanism.

10. in an apparatus for treating milk or other liquids, the combination of a heating mechanism having a rotatable milk-treating wall over which the milk is spread and travels in a relatively attenuated stream or film, means lfor suddenly and substantially uni- II'ormly heating all oi' the particles of the milk while it is so traveling over said rotatable Wall, a preliminary cooling mechanism arf ranged to receive the said heated milk immediately upon its leaving theheating mechanism and to hold said milk at a level lower than the level of the. milk in said heating uated stream or iilm, means for suddenlyv and rapidly cooling all ofthe particles of the mechanism, said cooling mechanism having said milk, while it is so traveling over said rotatable cooling wall, a final coolingmechanisin arranged to receive the' milk immediately upon its leaving the said preliminary cooling mechanism and to hold it at a level lower thanv the level of the milk in said preliminary cooling mechanism, said final cooling mechanism having a rotatable treating.

wall over which the milk is spreadand tra'vv els in a relatively thin or attenuated stream or ilm, means for reducing the tem erature of all of the particles of said milk whi e it is so traveling over said rotatable wall, a suitable frame supporting said heating, preliminary cooling and iinal cooling mechanism, power mechanism mounted upon said frame, three trains of ower transmitting devices for connecting t e rotatable walls, res ectively, of the heating, the reliminary coo ing, and the nal cooling mec ianisms to said power mechanism, means for conducting milk or other liquid from said heating to said reliminary coolin mechanism, and means or conducting mi k or other liquid from said preliminary cooling mechanism to said final cooling mechanism. i g

' 11. ln an apparatus for treating milk and other liqluids, the combination of an inner tween them, means for conducting milk from the top of the iirstpair of vessels to the bottom of the passage way between the second sage way in said brine cooler, and means for drawing off the milk at the top of said brine cooler.

12. In an apparatus for treating milk, the

combination of an outer Vessel adapted to` hold a bod of water, a rotary inner vessel adapted to old a body of watercut off from the body of water in said outer vessel, said vessels providing between them a passageway for the milk, the inner rotary vessel being removable upward from the outer vessel and having a substantially unobstructed space above it, and a driving mechanismfor rotating the inner vessel engaging therewith at points below the top thereof, means for supplying a stream of water to the inner vessel, and means for supplying milk to the bottom of the said passageway between the vessels, substantially as set forth.

13. Inan apparatus for treating milk and other liquids, the combination of a frame, a stationary vessel supported on said frame and adapted to hold a body of water around the passage-way for the milk which is being treated an inner rotary vessel holding a body therefrom, said inner rotary vessel being ar` ranged to be detached upwardly from said shaft and to be lifted out from the exterior vessel independently of said shaft, and power transmitting devices for driving the said shaft.

14. In an apparatus for treating milk, the combination of a stationary water-holding vessel, a milk-treating wall having one surface arranged to be engaged by the water in said water-holding vesseI and its other surface arranged to form one side of a milk passageway, a second wall arrangedto form the other side of said milk passagewa and adapted to be freely raised and lowere relative to said first described wall to permit the cleaning of said walls, and power transmittin mechanism for rotating one of said walls an connected with it from underneath to permit the said raising and lowering at will of the said second milk-treating wall without disturbing the said. power transmitting mechanism.

In testimony whereof Ialix my signature in presence of two witnesses.

JOHN C. MILLER.

Witnesses:

C. GEIDLINGER, HARRY H. MILLER.