US874598A

US874598A - Pasteurizer.

Info

Publication number: US874598A
Application number: US35272907A
Authority: US
Inventors: Aage Jensen
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-01-17
Filing date: 1907-01-17
Publication date: 1907-12-24
Anticipated expiration: 1924-12-24

Description

No. 874,598. PATENTED DEG. 24, 1907. A. JENSEN.

PASTEURIZBR.

APPLICATION FILED JAN. 17, 1907.-

2 SHEETS-SHEET l.

PATENTED DEC. 24, 1907.

2 SHEETS-SHEET 2.

Smwnm @Sahne/bow 1 7 Inthe accompanying drawings, Figure 1 lUNITED STATES PATENT oFFiCE AAGE `JENSEN, OF EUREKA, CALIFORNIA.

ras'raumzxn.

The objects of the invention are to provide a machine of this character, the construction of which is such as to exclude the possibility of. any erms commin ling taminating the liquid uring the process of pasteurizing; in which the heating medium shall be utilized in' the most effective manner possible to accomplish the desired result; and

containing means for insuring that the proper temperature is maintained in the heating medium.

is a vertical section of the apparatus; Fig. 2 is a section on the hne 2- 2 of Fig. 1; Fig 3 is a broken side view; Fig. 4 is a section on tlie line 4-4 of Fig. 3; Fig. 5 is detail .vertical section of the steam stand pipe.

Referring to the drawings, 1 indicates the l 'i outer base section ofthe machine, supported upon legs 2,'. and secured by screws 27lon said outer base is an inner or central base section 3, the central portion of which is ex tended upwards to form a journal 4 for the rotating shaft 5. Said shaft rotates upon an anti-friction disk 6, supported upon a steel vdisk 7 adjustable by a screw 8 screwed into a pulley 15 secured on the main shaft.16.

Saidmain shaft is journaled in a bracket 17 secured on the outer cylindrical wall 18 of the machine', and reinforced by a plate 19 on the inside of said wall. Thus the main shaft,

carrying the loose `and tight pulleys, 20, 21,

transmits lpower derived from any distant source, to impart rotation to the vertical vshaft 5.v l

22 indicates grease cups and 23 oiling conduits.

The upper end of the `journal 4 is formed with a cup 59 suliciently large to retain any .Specification of Letters Patent. Applioatlonled January 17.1907. Serial No. 352.729.

with, and ,con-y Paulmann. 24,1907.

oil which should ascend from the oil cavity along the shaft 5, the oil thus accumulating being removed from time to time.

The outer wall 18 of the machine is also I the outer wall of the annular chamber 27 for thel heati `medium. The inner wall 24 of said cham er 27 flares upwards, bein soldered at its lower edge to an annular s oulder 28 formed on the inner base 3, and being soldered near its upper edge to a flanged ring- 25, secured by screws to the outer wall 18. Said inner wall 24 is extended above said ring 25, and is secured to the inner edge of anannular trough 29, said inner edge making in cross section an acute angle with said'inner wall 24. The outer side of the trough 29 is formed by a cylindrical'vertical wall 30, and withinsaid ,wall fits a cover 31 open in the center. From onev side ot said trough 29 pxtends a horizontal tangential spout or outet 32.

In the conical space contained within the wall 24 ofthe chamber 27 rotates a conical impeller 26 having a wall formed of sheet metal, secured at its upper edge to an annular shoulder 34 formed on a casting 35 havin a hub 36, resting u on a shoulder 37 forme upon the verticals aft 5, and clamped down upon said shoulder by Infeans of a wing nut. 38 screwed upon the threaded end of the shaft; The lower edgeof the impeller wall is secured to the lower edge of the bell-shaped base 39 formed at the upper end into a sleeve 40 closely surrounding the shaft 5. Said base 39 is formed with an inwardly and downwardly extending rib 42' upon which is the inner wall of the heating medium chambei' -27. p The casting 35 extends horizontally or circumferentially beyond the shoulder 34 1 close to the vertical wall A30 to form an annular sto plate 44, its function being to hold down t e cream, milk or other liquid. From said castin'g 35, just within the shoulder 34, extends upwardly a circular wall 61, and the inner edge of the cover of the machine ts within close proximity to saidwall and thus excludes the entrance of germs.

-The li uidto be pasteurized is fed into a bowl l45, way valve 46 to a pipe 47 assing into a chamber 4 8 formed between t e inner base 3 om which it flows through a three- 35 tures.

and the base 39 but, when the apparatus is in use, the liquid is by centrifuga orce immediately drawn up into thernarrow annular asteurizing chamber 49 between the lmpelL ler and the inner Wall of the heating chamber, and is carried upwards and discharged into the annular trough 29, and passes thence by the horizontal s out 32. Y

The liquid is byt erotation of the impeller forced against the innerwall 24 of the heating chamber 27, and is thereby heated to the required tem erature, its temperature being ascertained y ins ection of a thermometer 50 partly 'inclose in said chamber. The heating medium generally used is hot water heated by steam admitted by a pi e 51 controlled by a valve 52 and connecte by an elbow 54 with a standpipe 53 lleading u through the bottom of the chamber 27, a'n secured in osition by locknuts 55 on both sides of sai base. From said stand pipe extend, at suitable intervals, `nozzles 56, which .discharge vtangentially and in the opposite direction to the direction of the rotatlon of the impeller. By means of the jets of steam discharged from the stand'pipe in a tangential direction, the water is given a rotary movement, and this has the effect of maintaining the temperature uniform throughout the heating chamber, and also of causing the heat ofthe water to be abstracted more rapidly by the inner wall 24 of said chamber 27, than if the water were stationary, or circulated only by means of dierence of tempera- These advantages, derived from the rotation of the water, are increased bythe fact that said water, on one side of the inner wall 24 of the heating chamber, and the milk, cream or other liquid, on the other side 40 thereof, move in opposite directions. -The surplus water arising from the condensation of the steam discharges from an overflow pipe 57.

t will readily be seen that from the time l it enters the machine until it leaves it, the

liquid to -be pasteurized can by no possibility be contaminated with germs, for they apron 41 prevents any ofthe said liquid passing into the cup 50, and, in the process ,50 of being pasteuri'zed, the liquid passes only.

between the outer continuous wall 26 of the impeller and the inner continuous wall 24 of the heating chamber, and since these are smooth unbroken walls, except for the blades 43, the liquid cannot be contaminated in this part of its movement. When it arrives at the annular trough 29, it is also evidently well protected from contamination, first, by the annular stop plate 44, which extends substantially into contactl with the cover, and then by the cover itself, which again extends inwardly into contact with the wall 61 eX- tending upwards from the top of the impeller. Also any hot gas which passes upwards 65 from the heated liquid will pass through the interstices between said stop plate 44,A cover 31 andwall 61 in an outward direction, thus opposing the entrance of any germs `into liquid.

A. further advantage of this construction is that the Whole of the body of the impeller can b'e removed at any time from the vertical shaft, by merely removing the cover and unscrewing the, jam nut, thus the a paratus is easy to keep clean. Any liquid lleft. within the interior cavity of the heating chamber canbe readily drained off by means of the valve 46. Y

I claim y 1. In a asteurizer, the combination with the upwar ly flaring conical inner wall of the chamber for a heating medium, and means forsupplying heating fluid to said chamber, of a-conical impeller, a vertical shaft, means for rotating the same, a casting secured upon the upper end of said shaft, having an annular shoulder to which the upper edge of the impelleriis secured, and a bell shaped base formed at its upper end into a sleeve closely surrounding the shaft, the lower edge of said impeller being secured to said base, substantially as described.

2. In a pasteurizer, the combination with the upwardly flaring conical inner wall of a chamber for a heating medium, of a conical impeller, a vertical shaft, means for rotating the same, a bell shaped base formed at' its upper end into a sleeve closely surroundin the shaft, said base having an inwardly and downwardly extending rib, and an apron secured upon said rib, substantially as described.

3. In a pasteurizer, the combination with the u wardly flaring conical inner wall of a chamber for a heating medium, of a conical impeller, means for rotating said impeller within said inner wall, means for supplying heating fluid to said chamber, and means for heating said fluid comprising an apertured stand pipe within the heating chamber, and 110 means or admitting steam to said stand pipe', said apertures opening in the opposite angular direction to that of the impeller, substantially as described.

4. In a pasteurizer, the combination of a p heating medium chamber, an impeller rotating within the same, means for rotating said impeller, and means for imparting to the heating fluid in said chamber a rotary motion in the opposite langular direction to that of the impeller, substantially as described.

5. In a pasteurizer, the combination of a heating medium chamber havingan inner -wall and a trou h connected with the upper edge of said wal an impeller-rotating Within said chamber, and comprising a casting at the top thereof, said casting extending circumferentiall into close proximit to the outer Wall o the trough, .and sai casting having a circular Wall and an annular cover olosin said trough, the inner edge of which extents into close proximity with said oireular wall, substantially as described.

6. In a pasteurizer, the combination with a heating medium chamber, of a vertical shaft, a step bearing therefor, a journal for said shaft, an impeller having at the top a casting removably secured on said shaft and at the bottom a base having a sleeve surrounding said shaft, and an annular wall eonneeting said Casting and base, and rotating within the innerfwall of the heatlng medium chamber, said casting having formed therewith a stop plate to form the top of the trough into which the liquid is discharged, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

AAGE JENSEN.

Witnesses:

FRANK NAZRO, J. M. NrssoN.