US459315A - Centrator - Google Patents

Description

(No Model.) 2 SheetsPSheet 1'.

R. STLNPIELD &- T. OLARKSON.

CBNTRIFUGAL SEPARATING MACHINE.

No. 459,315. Patented Sept, 8, 1891;

(No Model.) 7 2 Sheets-Sheet 2. R. STANFIELD 8: T. OLARKSON.

GENTRIPUGAL SEPARATING MACHINE.

No. 459315. Patented Sept. 8, 18 91.

UNITED STATES PATENT OFFICE,

RICHARD sTANEIELD,1OI EDINBURGH, scorLAND, AND THOMAS OLARKSON,

OF LONDON, ENGLAND, AssIcNORs TO THE oLARKsONsTANEIELD oON- CENTRATOR, LIMITED, OF LONDON, ENGLAND.

CENTRIFUGAL SEPARATlNG-MACHINE.

' SPECIFICATION forming part of Letters Patent No. 459,315, dated September 8, 1891.

Application filed May 27, 1890. Serial No. 358.365. (No model.) Patented in England January 17. 1889, N0. 890.

To all whom it may concern:

Be itknown that we, RICHARD STANEIELD, of HeriotlVatt College, Edinburgh, Scotland, and THOMAS CLARKSON, of Kings College, London, England, subjects of the Queen Of Great Britain, have invented certain new and useful Improvements in Centrifugal Separating- Machines, (for which we have obtained a patent in Great Britain, No. 890, dated January I0 17, 1889,) of which the following is a full, clear,

and exact specification.

This invention has for its object to provide a novel, simple, and efficient machine for separating metals, heavy minerals, and other dense bodies from their lighter associated Ores or materials.

Our improved apparatus comprises a centrally-mounted centrifugal vessel of special shape for the purposes hereinafter set forth and adapted to receive the materials to betreated. It is provided with a number of specially-constructed long, narrow, parallelsided radial apertures, each of sectional area only slightly larger than the particles to be treated, so as to allow free passage, and extending from the interior to the exterior of the vessel, and through which the material is ejected by centrifugal force and by which its velocity of projection is maintained practically constant. The improved centrifugal vessel is provided with means for driving it, and is combined with a dust-excluding cover for working parts, which may be rotary or not.

Our improved apparatus is also applicable for classifying according to size those materials the particles of which are of the same specific gravity, the larger particles flying farthest away because of their greater mass; but where the particles of any material are not of the same specific gravity they may first be classified according to size by the usual screening processes and then passed through the machine, when they will be separated according to specific gravity.

The improvements will be hereinafter described in detail and specifically set forth in the claims, reference being made to the accompanying drawings, in which- Figure 1 is a sectional elevation of the machine, showing driving-gear in elevation. Fig. 2 is a sectional plan on line X Y, Fig. 1. Fig. 3 is a part sectional plan of the speciallyformed radial apertures, and Fig. 4 is an en larged part section thereof.

In the drawings, the letter A indioates the centrifugal vessel into which the pulverized material is fed, and it is of the form shown in Fig. ]that is, expanded at both its upper and lower ends and contracted about the center. The expanded lower end is provided with a number of long narrow radial apertures a, through which the material is ejected. Referring to Figs. 3 and 4, these apertures a are made long in proportion to the diameter or sectional area. They are illustrated as straight and horizontal; but they may be curved and disposed to project the material horizontally or upward or downward at any desired angle. In cross-section they may be square, rectangular, or round; but although radially arranged they are parallel-sided for the whole of their length, except the inner ends, where the walls between them are beveled Off both vertically and horizontally, as shown, to facilitate entry of material. The vessel A may have one or more rows of such apertures a, and is made in two parts fixed together, the lower part beingasolid disk A, fixed centrally to the head of the spindle B and constructed with a central swell A Fig. 1. The joint is made as shown, orit may be horizontally through the apertures to facilitate the attachment of duplicate vessels suitable for the particular material to be treated and the cleaning of the apertures. Thus a number of upper parts A, with apertures of different size, form, or n umber, may form part of each machine.

The object of this peculiar form of vessel described is as follows: Since the feed of 0 granulated materialsis vertical and the direction of their projection horizontal, or thereabout, and since it is undesirable to further break up the materials by violent concussions, it is necessary to make the change of 5 direction of motion as gradual as possible. Hence the curved and expanded form of the lower end of vessel A and the swell A on the center of the solid base-disk A. The expansion of the lower end also enables a greater number of radial apertures to be employed, thus increasing the efficiency of the apparatus. The object of contracting the middle part, as illustrated in Fig. 1, is to inclose the vessel as completely as possible and prevent the materials flying out at the top. The

shaft B may be driven from a shaft by bevel-wheels D and E or by ordinary belt or rope gearing. The spindle B is mounted in bearings F and G in the mainframe H. The bearing F is protected from dust by the cap I and by an external conical cover J. The cover J may be fixed; but in cases where it is required to use the well-known revolving brushes and annular receiver it is made to revolve, and this may be done according to the improved means illustrated. The cover J rests on rollers K, centered in the main frame L. Lateral displacement of the cover J is prevented by bearings M N, and to exclude dust from the cover its top is sunk a little way into the flange A and overlaps the frame L at Z. The cover J may be rotated by an internally-toothed wheel R and pinion S,

' fixed to a short spindle carried in a sleeve 15,"

directly or by feed-pipe X from hopper X, p

and the vessel is rotated at a speed as nearly constant as practicable, any suitable speedregulating apparatus being applied, if required. or curved disk A of the centrifugal vessel A, and thus their direction of motion is gradually changed and they are directed into and ejected through the apparatus a.

Apparatus constructed as above set forth i is applicable to the treatment of ores of gold,

silver, tin, lead, copper, or any other metal.

It may be used for sizing purposes, or in conjunction with other sizing appliances for the purpose of separating metals and minerals from ores.

We would statethat we are aware that The particles fall onto the swelled v centrifugal apparatus for ore-separating and analogous purposes is known; but the rotary part has, so far as we know, always consisted of a dish-shaped receiver or cup or distributing-disk with simple lateral apertures or narrow slots or continuous circumferential vents in its sides; also, that arms horizontally projecting from a feed-tube have been tried; but

What we claim is- 1. In an ore separator or classifier, the combination of the rotary spindle B, having at its upper end the attached solid disk A, provided at its center'with the upwardly-projectin g swell A with the vessel A rigidly secured to the disk and formed with the contracted upper portion and the expanded lower end having long narrow radial apertures, the bottom walls of which are formed by the solid disk,

substantially as described.

2. In an ore separator or classifier, the combination, with a centrally-mounted centrifugal vessel having apertures a and the drivingshaft B, of a rotary'inclosing cover J, having dust-excludin g devices, an internal gear-ring R, a pinion S, and a shaft 0 for rotating the pinion, substantially as described.

3. In an ore separator or classifier, the combination of the revolving vessel A, formed with the expanded lower end provided with radial parallel-sided apertures a, a rotary shaft B, having an attached solid disk A, provided with the raised or swelled center A which forms the bottom wall of the vessel, and the inclosing cover J, provided with the dustcap I, extending to the under side of the solid disk, substantially as described.

In testimony whereof we affix our signatures in the presence of two witnesses.

RICHARD STANFIELD. THOMAS CLARKSON.

WVitnesses to the signature of Richard Stanfield:

HUGH (J. PEAOOCK, U. S. Vice- Consul, No. 8 York Buildings,

Edinburgh.

NEIL BROWNLEE, Clerk, U. S. (Ionsulate, No. 8 York Buildings,

Edinburgh. I

Witnesses to the signature of Thomas Clarkson:

J OSEPH C. CHAPMAN,

Patent Agent. HORACE J. BODDINGTON.

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