US514156A - Gael johan ltindstrom - Google Patents

Description

`(No Model.)

0. J. LUNDSTROM.

2 sheets-sheet 2.

GBNTRIPUGAL LIQUID SBPRATOR.

Patented Feb. 6, 1894.

enzow.

its bottom with a bearing A2 in which the up- UNITED STATES PATENT OFFICE .CARL J OHAN'LUNDSTROM, OF LITTLE FALLS, NEW YORK, ASSIGNOR TO D.

` BURRELL & CO., OF SAME PLACE.

CENTRIFUGAL LIQUID-SEPARATOR.

sPEoIFrcATIoN forming part of Letters Patent No. 514,156, dated February e, 1894.

Application tiled January 24, 1893.

To a/ZZ whom it may concern.-

Be it known thatl, CARLJOHAN LUNDsTRoM, a sub; ect of the King of Sweden and Norway, reslding at Little Falls, in the county of -Herkimer and State of New York, have invented a new and useful Improvement in Centrifugal Llquld-Separators, of which the following is a specification.

This invention relates to that class of centrifugal-separating machines which are employed'.V for separating a compound liquid or emulslon into its constituent liquids of different densities, particularly for separating full milk into cream and skim milk. These separators are provided with imperforate drums or bowls which are in many casesfilled wlth numerous division rings whereby the body of liquid is divided into thin layers and which are designed to increase the separating capacity of the machine. i

The object of my invention is to simplify the means placed within the liquid space of the bowl for the purpose of 'increasing its separating capacity.

In the accompanying drawings consisting of two sheets:-Figure lis a vertical section of the centrifugal creamer provided with my improvements, the section being taken inline 1 1, Fig. 2. Fig. 2 is a horizontal section in line 2-2, Fig. l. Figs. 3 and 4 are vertical sections, on a reduced scale, showing different forms of the internal cone. Like letters of reference refer to like parts 1n the several gures. A` represents the stationary curb or incloslng case of the machine which is of any ordlnary construction and supported -in the usual way on standards A and provided in per part of the spindle B is journaled. The spindle is rotated in the usual way by a belt and pulleys, or by a steam turbine, or by other suitable mechanism.

C represents the bottom and O the vertical peripheral wall of the bowl, formed in one piece with or-secured tothe bottom.

C2 represents a bottom plate which may be arranged underneath the bottom C of the bowl and which rests upon a shoulder c formed at the -upper end of the spindle B around an upwardly projecting screw shank Serial No. 459.533. (No model.)

c of less diameter than the spindle. This bottom plate reinforces the bottom of the bowl and is secured thereto by rivets, or otherwise- D represents the feed cup arranged centrally on the bottom of the bowl and provided in its bottom with a screw-threaded opening by means of which it is screwed to the upper end ofthe shank c of the spindle, sothat the feed cup serves as a screw nut for securing the bowl to the spindle. The feed cup is preferably made flaring downwardly and provided in its peripheral wall with one or more apertures d through which the full milk escapes 'therefroln These apertures may be provided with discharge pipes d projecting outwardly from the cup, if desired.

E represents the cover of the bowl, which rests near its outer edge upon a packing ring e arranged in a groove formed in the top of the peripheral wallvof the bowl, and which tapers upwardly to a contracted neck E'. This cover is provided on its under side with the usual skim milk discharge pipes f and in its contracted neck with the cream outlet f G G are two superposed receptacles supported upon' theV curb A and receiving re-` spectively the skim milk and the cream from the skim milk pipes f and the cream outlet f.

H represents the milk receptacle which receives the milk to be separated and which is provided with a depending discharge pipe h.

I represents a tubular stem arranged axially in the drum and secured with its lower screwthreaded end in a screw-threaded opening formed in the top of the feed cup D. A jam nut is preferably applied to this tubular stem upon the top of the feed cup. The upper portion of this tubular stem passes loosely through the contracted neck of the cover and is provided at its upper end with an external screw thread to which a screw nut j is applied which bears upon the neck of the cover and presses the cover down upon its seat on the bowl, so that by means of this stem and screw nut the cover is secured to the bowl in a very simple manner, and can be lifted off upon removing the screw nut.

The depending pipe h of the milk receptacle is arranged centrally in the upperrportion of the tubular stem and is so much smaller IOC in diameter than the stem that the milk, issuing from the pipe h, drops directly into the feed cup and does not come in contact with the inner surface of the stem, the rotation of which would retard the downward movement 0f the milk coming in contact therewith. In order to prevent any milk which may come in contact with the inner surface of the stem from being driven ont ofthe upper end thereof by centrifugal force, the stem may be provided above the outlet of the tube 7L with an inwardly projecting rim or flange.

IVhile I prefer the construction of the parts hereinbefore described I do not wish to limit myself to the same as other suitable or well known constructions maybe employed,if desired.

K represents a hollow separating cone which is arranged in the liquid space of the bowl and which rests upon the bottom of the bowl, at or near the peripheral wall thereof, and extends obliquely upwardly and inwardly from the bottom toward the cream outlet and terminates with its contracted end in the vicinity of the cream outlet. This cone extends diagonally through the thickness of the annular body of liquid in the bowl and divides that body into an inner portion L, arranged between the point at which the full milk is received at the bottom of the bowl and the inner surface of the cone, and an outer portion L', arranged between the outer surface of the cone and the skim milk outlet. The diameter of the small end of this truncated cone is somewhat larger than the inner diameter of the cream wall so that the cream, which is separated from the milk on the inner side of the cone, can pass upwardly beyond the small end of the cone and so reach the cream outlet in the neck of the bowl.

The full milk enters first after escaping from the feed cup, the liquid space on the inner side of the cone and is there subjected to centrifugal action, whereby the cream globules are crowded toward the axis of rotation while the globules of blue milk are driven outwardly.

The cream globules accumulating in the inner layer of the inner body L of liquid are moved upwardly, toward the cream outlet by the incoming supply of milk at the bottom of the bowl, while the particles of skim milk or blue milk reach in their outward course the inner surface of the cone and travel downwardly along the latter under the iniiuence of the centrifugal force and finally escape around the lower edge of the cone into the outer portion L of the body of liquid. This cone is constructed of tin, or other suitable material, and rests loosely on the bottom of the bowl, so that the centrifugal force can drive the partially skimmed milk past the lower edge of the cone. In the cuter portion of the body of liquid this partially skimmed milk is further separated, the cream globules beingcrowded inwardly and flowing upwardly along the outer surface of the cone, while the particles of skimmed milk are massed against the inner side of the peripheral wall of the bowl and [low upwardly along the latter to the outer ends of the skim milk pipes f, which they enter. The cream separated on the inner side of the cone and that separated on this partially skimmed milk, which accumul" lates in the outer layer of the inner portion of the body of the liquid, is then subjected on the other side of the cone to a further or secondary separation, whereby the smaller cream globules, having less buoyancy, are separated from the skimmed milk and whereby the operation of skimming is completed.

The cone is preferably provided on its outer side with radial blades m which prevent the liquid from changing its position circumferentially with referrnce to the cone and bowl and it may also be provided on its inner side with radial blades fm. When it is desired to clean the bowl, the receptacles for the milk, the cream and the skim milk are removed, the cover is taken off and the cone is lifted out, whereby the entire inner surface ofthe bowl is quickly made accessible, and these parts are as quickly replaced for restoring the machine to its operative condition.

Instead of making the cone flaring to its extreme lower edge, as shown in Fig. l, it may be flaring only part way down and its lower part may be made cylindrical, as represented in Fig. 3.

In order to increase the separating capacity of the cone its superficial area may be increased by corrugations, for instance, by providing it with horizontal corrugations forming alternate ridges and depressions of gradually decreasing diameter toward the small end of the cone, as represented in Fig. 4.

My improved cone adds but little to the weight of the bowl, which latter, when provided with this cone, is much lighter than a bowl provided with a nest of division rings. This permits the machine to be operated ata higher speed without an increase in power, and wherebya corresponding increase in separating capacity is obtained.

I claim as my inventionl. The combination with the separating bowl having an inlet for the full milk, a discharge for the skim milk communicating with the peripheral portion of the bowl and a cream discharge communicating with the cream space of the bowl, of a hollow separating cone extending through the liquid space of the IOO IIO

bowl and terminating with its small end near the cream outlet thereof, whereby the full milk is first separated within the cone, and the cream is discharged at the small end of the cone, whilegthe partially skimmed milk passes from the large end thereof into the space between the cone and theperipheral wall of the bowl, in which space the partially skimmed milk is further Separated and from which the creamv and the skim milk are separately discharged, substantially as set forth.

2. The combination with the separating bowl having an inlet for the full milk near ered through the same cream outlet, substantially as set forth.

3. The combination with a separating bowl having an inlet for the full milk at its bottom and discharges for the separated cream and skim milk at its top, of a hollow separating cone extending diagonally through the liquid space of the bowl from the bottom toward the cream outlet and terminating with its small end near'the cream outlet, and u pright wings secured to the outer side of said cone, substantially as set forth.

Witness my hand this 18th day of January, 1893. f

CARL JOHAN LUNDSTROM.

Witnesses:

GEo. W. SEARLEs, HARVEY FELDMEIER.

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