US1625377A - Backing for centrifugal baskets - Google Patents

Description

1927. April 19. E. .ROBERTS BACKING FOR CENTRIFUGAL BASKETS Filed A1121. 18, 1921 gg 75M MQ. M www Patented Apr. 19, 1927.,

UNITED STATES i 1,625,375? PATENT OFFICE.

EUGENE ROBERTS, F SALT LAKE CITY, UTAH, ASSIGNOB TO TEE 'WESTERN STATES MACHINE COMPANY, OF SALT LAKE CITY, UTAH, A CORPORATION OF UTAH.

This .invention is intended to provide a construction which shall overcome certain dihculties in the use of centrifugal baskets of the type employed in sugar mills for extracting the liquid content from the sugar by centrifugal action.

These baskets Aare commonly made of cylindrical form with fairly coarse perfora- 'tions in the cylindrical wall which is reenin forced to withstand the internal pressure by means of circumferential iron ribs. To re- Itain the solidparticles of sugar, while allowingwthe liquid to :,scape, a finely per- :foratedr sheet metal screen is employed, and M to afford communication between the fine perorations in the-screen and the more wide perforations in the basket, a reticulated backing is interposed betweenthe cylindrical l basket wall and lthe interior perforated linei'etofore it has been the practice to ernplo a long strip of wire netting of say 1A; incli mesh whose length is perhaps 4 or 5 inches greater than the`internal circumferk215 .ence of the centrifugal basket for which it is intended, so that the two ends of the backing may overlap for a ew inches. l have discovered in practice that the perorated linings or screens, when taken out 8o ot' the basket, often show cracks or breaks extending vertically and upon investigation found that such cracks or creases in the screen are due to two causes, one of them being the unequal stretching of the bottom andv top portions of the screen which leads to buckling, and the other causebeingD the re. sult of the extra thickness formed y overlapping the ends of the backing which forms the intermediate support for supporting the screen againstthe outward thrust or pressure of the sugar mass. The resent invention over ous de ect by providing a backing so structed as to present, no salient og ing olf place between the interior screen an?" the external basket wall capable of creasingor cuttin the screen.

In t e accompanying drawings l have illustrated a construction and arrangement" embodyingl the principles of this invention in which: v y L Figure 1 is a perspective view showing the front half of thecentrifugal basket cut away to` expose theinterior screen and a portion of the overlapped portion o the interior comes this sericon- :sal

Application led August 18,

BACKING FOR CENTRIFUGAL BASKETS..A

1921. Serial No. 493,325.

backing on the outside of said screen, the screen perforations being omitted.

Figure 2 is a horizontalsection through the overlapped front portion of the backing showing also a portion of 'the interior screen on an enlarged scale, resting against the outer basket wall. Fi ure 3 is an enlarged detail-view showing t e overlapped ends of the reticulated backin t In t e practice of this invention, according to the form illustrated in the drawings, a strip of wire netting of about 1A inch mesh, more or less, of a height corres ondl ing to the depth of the basket is cut o to a length` of approximately V4: or 5 .inches greater than the interior circumference of the. basket. This netting is usually of a plain in and out weave comprising longitudinal or circumferential wires l, and vertical or transverse wires 2..

To prepare this backingor its long service l first remove entirely the two or three vertical strands or wires 2 adjacent to each end of the reticulated strip. After the removal vof these vertical strands or wires there will be left circumferential or warp wires extending approximately '074 of an inch, more or less, beyond the reticulated body ortion of the strip. These-circumferential y projecting ends are then ground ofi to taper the ends down to a point as indicated most clearly at 3 in Figure 2. The reticulated strip with its rojecting end wires thus ta ered or reducedJ is then folded into a. cylin er with overlap ing ends and inserted inside the cylindricawall 4 of the 1 basket where it will be observed that the tapered ends lie snugly against the overlapped reticulated oition of the basket, the g5 tapered wires of t e opposite" ends of the backing being separated or extended some distance apart as best seen in Figure 2.

' By this construction and arrangement I j provide an ample overlap of the ends of the 1m acking, while at the same time avoiding any crease producing projection or thicki ness liable to cause a break in the iinely perforated lining or screen 5, and find in practice that the life of the screen as well as 105 of the lining itself is very much prolonged, and that troubles due to unevennessin the interior surface of the screen heretofore caused by this overlap are fully prevented.

What l claim is:

l. ln a. centrifugal basket the combination with a perforated eireuinterential basket wall. an Uinterior tinely perforated screen, and an interposed retieulated backing' eoniprisinggl a strip ot' retieulated material where opposite end portions are overlapped with the eirouinferential strands projeetin;r a substantial distanee beyond the retieulated or woven body and gradually reduced in thickness radially to avoid the formation of creases in the sereen when the screen is forced against the barking` by the Centrifugal pressure ot the interior mass of inaterial in the basket, substantially as deserilied.

Q. A backing' ttor a centrifugal basket screen embracing an elongated strip of Woven wire ot a length somewhat greater than the interior eireuniterenee of its eentritueal basket to allow the ends to overlap when plaeed inside the basket. several of the transverse or rertieal `rires being removed from the extreme end portions ot the strip to leave eircuinferentially projecting ends of Wire, said projecting wirA ends being tapered toward their tip ends to ,gradually reduee their thickness radially, substantially as described.

A, backing` Yfor a centrifugal basket eoniprising interwoven series ot eireuniferential and vertical wires. the eireunrterential Wires being ot a length somewhat greater than the interior circumference of the basket to torni an orerla p and projectingy a substantial distance beyond therertieal Wires nearest their ends, said profeetiaf;V end portions being' tapered toward their tips to provide a gradually slopingf ineline to the overlappingn portions ot the woven body portion ot the backing wherein' the backing;- is enabled to support the outward thrust ot the screen without forming; creases in the screen, substantially as described.

In Witness whereof, I have subscribed lthe above specification.

Etienne, aonnirrs.

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