US 764489 A
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No. 764,489. l PATENTBD JULY 5, 1904, K. KpMoLEoD. CREAM SEPARATOR.
v PPLIOATION FILED oo'xxv, 1903. 11o MODEL. 2 ammira-sum1? 1 655mg/ @iwan www@ l No. 764,489.
Patented July 5, 1904.
KENNETH K. MCLEOD, OF SPARTA, VVISCONSAIN.
SPECIFICATION forming part of Letters Patent N0. 764,489, dated July 5, 1904.
Application filed October 7, 1903.
To all whom, t may concern.'
' Be it known that I, KENNETH K. McLEoD, a citizen of the United States, residing at Sparta, in thecounty of Monroe and State of Wisconsin, have invented new and useful Improvements in Cream-Separators, of which the following is a specification.
My invention relates to improvements in centrifugal cream-separators of that style `or class wherein a column of milk fed to the machine .is separated into its constituent or component elements by the force or action generated by rapid rotation; andI the object is to simplify and improve the existing constructions of machines intended for the purpose.
The improvements embody a plurality of concentrically-disposed cylinders, spirally-arranged partitions between the cylinders, alin-` ing pcrforations in the shells of the inner cylinders, and a centrally-positioned feed-tube to deliver the material at the bottom of the inachine, all as will be fully specilied and the asserted novelty particularly pointed out and distinctly claimed.
In the drawings, Figure 1 is a vertical central section through the machine. Fig. 2 is a side elevation partially broken away. l
In the drawings similar parts appearing in the respective illustrations are designated by like reference notations.
A designates a strong metal cylindrical shell of suoli dimensions and capacity as will suit it to the purposes of its use. This casing is made or provided .with a strong bottom 1, having a centrally-positioned vertical spindle Q, which is provided with a pulley or other gear connections to communicate the requisite rapid rotation. These power-imparting elements are not illustrated, because they are well known and form no part of my present invention. A conical cover 3 is suitably secured on the open end of the casing A and `sealed against leakage at its union with the casing, as by a packing-ring 4. The conical cover is formed with an open central vertical extension 5, through which access can be had to the interior of the machine.
' 6 designates the feed-tube centrally positioned in the casing and extending the length serial No, 176,119. (No model.)
thereof, with its lower end secured in any proper way in or to the bottom ofthe casing, and at its lower end is provided with openings 7, through which the charge of milk finds its way into the interior of the machine, to be subjected to the separating centrifugal function or action thereof. At the upper end of the feed-tube is a detachable and adjustable circular collar or plate 8, which may be moved down to close the opening into the casingand also to hold the cover 3 lirmly in position thereon.
Within the casing, concentric to the of the feed-tube 6, is placed and arranged a cylindrical shell 9, the inmost of the series, the up-l per end of which reaches well into thetop portion of the casing, this shell being the longest of the series. At the lower end -of the shell 9 is formed a horizontally-arranged circular flange 10, which extends to and fits against the inner face of the casing and at its inner edge is formed with a turned-down vertical flange 11 and a similar` flange 12 at its outer edge, as shown in the drawings. The inner flange 11 is made with a number of perforations 13, according to the determined capacity of the machine, through which perforations the milk escapes under the flange 10 and thence up through perforations into the respective spaces between the concentric shells or cylinders. l To the outer face of the cylindrical shell 9 are arranged in vertical succession a series of spirally-arranged ribs lei. These ribs begin at their lower ends in short vertical por tions and after beingl disposed spirally terminate in similar vertical portions. The ribs are triangular in cross-section, as shown, and have their bases secured -i to the outer face of the shell by rivets or screws or by metal cementation.V The llaring channel thus formed between the ribs tends to break and separate the material during its entire course through the machine, having a tangential direction upwardly, downwardly, and outwardly. In the shell between the bases of opposite ribs are made aseries of holes 15, through which the material is delivered into the next spiral passage of the second cylindrical shell.
16 designates a second cylindrical shell which surrounds the shell 9 with the points of IOO the spiral ribs touching its inner face. This shell 16 is of identical construction to the shell or cylinder 9, ribs and all, except that the former is of longer diameter and made shorter, and 17 designates the third cylindrical shell, shorter than shell 16 and surrounding the cylinder 16 and provided with spirally-arranged ribs the points of which touch the inner face of the main cylinder or casing A. The ribs of the respective cylinders are in substantial alinement, and the lines or series of holes between the spiral ribs in the shells are in horizontal alinement, so that the milk will pass through the holes from one cylinder into the next from the inmost to the outermost space or channel.
The number of the concentrically-placed cylinders may be increased or decreased, according to the size and capacity of the machine.
lt will be seen that as the milk enters from the top of the feed-tube it descends and escapes at the openings at the lower end and is forced outward through the holes in the flange 11 and then by the action of rotation is forced up the passages between the spiral ribs and the perforations, and as the casing fills up the milk proceeds or moves upward until the whole is filled. In the progress of the filling the centrifugal force has caused a separation of the milk, the heavier skimmed milk reaching the outer ribbed space and is carried up the ways or passages to the upper ends and discharged through tubes in common use in apparatuses of this kind. The cream being the lighter constituent, finds rest nearer to the center of the casing and finds escape through a small oriiice nearest to the center of the apparatus and there discharges into a pan arranged, as usual, to receive it.
Having thus described the invention, what is claimed as new is- 1. A centrifugal cream-separator comprising an outer cylindrical casing, a conical cover secured thereon, a feed-tube centrally positioned and secured therein and having a discharge-opening at its lower end, a cylindrical shell positioned concentric around the feedtube and formed with a horizontal circular flange at the lower end itting the casing and formed with an inner depending flange having passages therethrough, spirally-arranged ribs aboutthe cylindrical shell and perforations between the ribs, and a second cylindrical shell arranged on the first-named shell and about the spiral ribs, and spiral ribs on the second shell closing the space betweenits outer face and the inner face of the next inclosing shell, substantially as described.
' 2. In a centrifugal cream-separator, the combination with an inclosing casing, a cover therefor, and afeed-tube, of a plurality of concentrically-disposed cylindrical shells, each of which is provided with spirally-arranged ribs reaching entirely across the space between adjacent shells, and provided with apertures in the shells between the spiral ribs, substantially as described.
3. In a centrifugal creamseparator, the combination with an inclosing casing, a cover therefor, and a centrally-arranged feed-tube therein, of a plurality of concentrically-disposed cylindrical shells, each of which is provided with spirally-disposed ribs triangular in cross-section and having vertical portions at their respective ends and made to reach across the spaces between the cylindrical shells and the inclosing casing respectively, and lines of apertures in each shell, between the ribs.
In testimony whereof I afiix my signature in presence of two witnesses.
KENNETH K. MCLEOD.
W. Gr. WILLIAMS, W. R. CROSBY.