US521730A - Centrifugal separating-machine - Google Patents

Description

(No Model.)

0. OHLSSO-N. GENTRIFUGAL SEPARATING MACHINE.

No. 521,730. Patented June 19, 1894.

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UNITED STATES PATENT OFFIcE.

.oLoF oHLssoN, F NEWARK, NEW JERSEY.

CENTRIFUGAL SEPARATING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 521 ,730, dated June 19, 1894. I

' Application filed January 3, 1894. Serial No. 495,516. (No model.)

' in the county of Essex and State of New J ersoy, have invented certain new and useful Improvements in Centrifugal Separating-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference. form a part of this marked thereon, which specification.

This invention relates to that class of centrifugal separating machines adapted for use in connection with the manufacture of butter and cream, and, more particularly, to that class in which one or more interior flanges or wings are employed for imparting rotary movement to the fluid to be separated into heavier and lighter parts. machines, heretofore, the wings which have been of sheet metal have been formed of a single thickness of sheet metal and at their edges which engage the interior surfaces have been alternately bent, or so that, for a short distance, the metal extendslaterally to one side of the wing. at right angles thereto and then, for another distance, it is oppositely bent. But at no one point in its edge did the metal forming the flanged seat extend in opposite directions to resist moreper fectly thev strain of the fluid under centrifugal action, and, thus because of the said construction, the wings were a constant source of expense for repairs.

The object of the invention is to secure increased strength in the Wings, to effect a more convenientadjustment of means for regulating the proportions of cream and blue milk in the final outflow, to reduce the cost of construction, and to secure other advantages and results some of. which will be referred to in connection with the description of the working parts.

The invention consists in the improved centrifugal separator, and in the arrangements and combinations of parts, all substantially as will be hereinafter set forth and finally embodied in the clauses of the claim.

Referring to the accompanying drawings,

In. this class 'of.

in which like letters indicate corresponding parts in each of the views, Figure 1 is a central vertical section of-a centrifugal separating bowl having my improvements. Fig. 2 is a horizontal section of the same taken at line at. Fig. 3 is a detailperspective view of oneof the wings in said separating bowl, and

Fig. etis; an enlarged section of one of said wings, showlng more clearly the construction hereinafter described.

In said drawings, a indicatesa centrifugal separating bowl of any ordinary and suitable construction. x

b is a rotary supporting shaft driven by suitable mechanisms, not shown, and care wings or flanges within said bowl, for imparting rotary movement to the liquid to be separated.

Heretofcre, in separators of this class, great difficulty has been experienced in holding the wings in proper operative position. The resistance of the'fiuid, under centrifugal action, has tended to bend the wings when they were of sufficient lightness, and to wrench the same from their bearings on the walls of the bowl. In the present case, I have secured a light construction and yet one that possesses adequate strength, experience proving that the said wings are capable'of resisting the forces conimonly brought thereon in practical service.

The improved wings consist of thin sheet metal plates, doubled as indicated in Fig. 4., theside parts, 0, being pressed one against the other and, at their edges, 0 being bent outwardly to form a seat, 0 to bear against the walls of the bowl. The said seat extends continuously on opposite sides of the wings, the flangeson each side part being bent oppositely from those on the adjacent side part, so that at each point of engagement with the bowl it has opposite supports and thus the wings are prevented from being forced out of shape under the pressure of the fluid, and from being torn from the side of the bowl as is the case when wings of the earlier construction are employed. The seat is made to conform to the shape of the said walls so that theremay be a firm union of parts.

In referringto the walls of the bowl, I intend to be understood as including the bottom surfaces as well as the upper surfaces of the bowl. The plates, after havingbeen bent as de= Too scribed, are thrown into a kettle of liquid tin or soldering metal and the seams, formed in doubling the plates, are filled therewith, and, after removal, this tin forms a continuous coating to the wings and serves in making a solid interior. The tin surface enables the sheet metal to be soldered to the tinned surface of the bowl quickly and with strength.

To regulate the outflow of the cream from the bowl in the separating operations, I have provided an adjustable cream eduction tube, (1, of novel construction, and of increased convenience under certain conditions. In arranging this tube in position, I insert one end in a perforation e, of a flange or hearing, f, of the bowl. The upper end of the said tube, extends to the mouth of the bowl, or to a position from whence the cream may flow to a suitable receptacle. llcre said tube is provided with a bearing, 9, which may be, and preferably is, recessed as shown in Fig. 1. A set or adjusting screw, it, arranged in the bowl adjacent to the bearings, g, extends toward said tube and enters the recess in said bearings, g, so that when the screw is turned in its threaded bearings, the free end will be caused to move to or from the axial center of the bowl, and thus the cream wall, indicated at 11, will be correspondingly changed, the outflow of cream modified, and theproportion of cream and skim. or blue milk remaining therein will be varied accordingly.

The operation of the machine to secure a separation of cream from the bluemilk. is as 1. The combination with the centrifugal 4o separating bowl of internal wings, each consisting of a piece of sheet metal doubled as described, and at both its vertical and horizontal edges oppositely bent to form directly opposite flanges which engage the vertical sides and bottom of the centrifugal separating chamber, the doubled part back from said opposite flanges being united by tin or other allied metal, substantially as set forth.

2. The combination with the bowl, of a cream eduction tube, having a fixed bearing upon the bowl, and having a free end controlled by a set screw and movable to or from the center of the bowl therewith and said set screw, substantially as set forth.

3. The combination with the bowl having the bearingf, a tube fixed on said bearing and having a free end, a set screw having its bearings adjacent to said free end, and adapted to move the same toward or from the cen- 6o ter of the bowl, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 29th day of December, 1893.

OLOF OHLSSON. Witnesses:

CHARLES II. PELL, LOUISA Bnownn.

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