US1443608A - Concentrator - Google Patents

Description

Jan. 30, 1923.

D. E. BLEAKLEY.

CONCENTRATOR.

FILED APRQS, 1922.

M, lm Al l l I I r l.

@maid Patented Jan. 30, 1923.

'bil

CONCENTRATQR.

Application led April 3,

17 70 @ZZ whom t may concer/n.:

Be it known that I, DAVID E. BLEAKLnr, a subject of the King of Great Britain, residing at Cakland, county of Alameda., and State of California, have invented new and useful improvements in Concentrators, of which the following is a specification.

This invention relates to concentrators and especially to concentrators of the centrifugal type.

in the working of placer or alluvial deposits containing precious metals .such vas gold, platinum and the like, a considerable percentage of the metals or values escape with the tailings due to the diculty of catching or retainino` the liner values, such as flour gold, etc. great variety of concentrators, jigs, rockers, amalganiating devices, etc. have been employed for this purpose, but with comparatively little success, as practically all concentrates obtained from such sources contain a large proportion of black sand and other heavy matter, which packs behind the riiles and thereby prevents the liner values from lodging. Again water in fairly high velocity and a large volume must be employed in most cases to keep the material moving and to prevent excess pack# ing behind the riiiles and the finer values are not given an opportunity to settle. Again, when amalgam traps or other amalgamating devices are employed, scouring action takes place and the quicksilver flours and escapes. Such losses in most cases more than offset the value of the hner metals caught and are therefore useless and pro liibitive. The problems and conditions gust stated are by no means exceptional, but are rather vcommon and every day difficulties, and it might here be stated that they present unsolved problems as no effective apparatus or method has so far been developed.

rihe present invention embodies a concentrator of the pan type, and one which utilizes centrifugal force and an agitating movement; the object being to project the values by centrifugal action and to trap all values and then settle them by stratication caused by difference in specific gravity. The invention also embodies'a simple and substantial form of apparatus in which is sup' ported a concentrating pan in which the material to be concentrated is delivered. The invention further embodies a mechanism for imparting an oscillating movement lto 1922. Serial No. 548,987.

the pan as wili hereinafter be described.` Other objects will hereinafter appear.

The invention consists of the partis and the construction, combination and arrangement of parts as here, fter more fully described. and claimed, hat ing reference to the accompanying drawings, in whiche- F ig. l is side elevationof the machine partially in section.

@ ig. 2 is a plan view thereof.

Referring to the drawings in detail, A indicates a base plate and 2 a standard or vertical frame, which supportsv a horizontal arm or bracket 3. `Formed on the outer end of the bracket 3 is a journal member 3a, and similarly formed in alignment therewith on the base is a bearing member 3b. Vertically positioned and journalled in the.` bearing members is a shaft Li, and secured on the lower end of the shaft is a concentrating pan generally indicated at 5. `-Formed or otherwise secured in the pan is a series of superposed annular ing like riffles 6 and 7, and adapted impart an oscillating movement to the shaft and the pan :carried thereby, a pinion 8 and a se-gn'iental gear 9 are employed. The segmental gear is journalled on a pin l0 and it provided with an operat# ing handle or lever ll by which an oscillating movement may be imparted thereto.l The 'segment or gear@ interineshes with the pinion 8 and as'this is secured to the shaft a alternate or reverse revolutionwill be imparted to the shaft and the pan.

ln actual operation the mat iai to be concentra-ted, together with a suflicient amount of water to insure washing of the material and removal of the tailings and waste,` is delivered to the center portion of the pan from any suitable source and in any snitable manne-r. At the saine vtime an oscillating nio-vement is imparted to 'the lever il and the. segmental gear 9 and a succession of rotating movement will thus be imparted to the pan. For instance the gear ratio may be such that the pan will turn one revolution in one direction, then reverse its movement and rotate one revolution in the opposite direction. Such turning movement of the pan sets up a centrifugal action which is more than suflicient to throw the material outwardly in under the riffles, but as the material is gradually being delivered it can readily be seen that the material assumes an inverted cone shaped formation and that the lodge in under upper ri'llle Where it is 'i'ffllly and perroanentlj:` caught. ln this l be remembered that the large proportion ot i ier materials, und materials, due to behind the i connection it slio concentrates conn islaclsand and ce that all of these Il lod 5 grada I tl j:

Le me 'rarity 'ienetrating the 's 'Y ially lodging in the on behin il and in under the riles, r-inother important feature is that packing or' the concentra-tes is entirely avoided as each reyv agit-ating ino thoroughly Josens the mass ol concentrates and thereby prevents packing ot the saine. The Vliner ya es, such l'lour gold and the like, are fir i l fus gi'af'en an opportur. to penetrate l e navier black sands and the like and will thus Worl through the mass `Where they will be trapped hy the rillles, and as they ouild up in quantity, together with other metals trapped caught, blaelr sand will be gradually liberated oy displacement and Will escano over the rifdes and di charge with the W and tailingsa il. tailing launder may be arranged exterior of the pan to receive and renio the tail' igsT but such lauuder rn. cy be ed any suitable manner and carried any point desired, it is obvious that illustration is here thought unnecessary.

The present L.; lor prospecting purposes in placer deposits;

may be en'iployed for cleaning up concentrates from dredges, sluice bores and the `1 e, or it muy be employed Jor sampling purposes where ground r ores are being l fed; its range in use in connect-ion With riferi-1 ot this kind being almost unlimited as rue test ol the samples talen may be ob- "oed due to the tact that all values are re- The capacity o the machine may by increasing or decreasing the dep. i and diameter oic the pan and the number of Aillles employed, anc it may further be increased bj: placing` one or more series of pans on a common shaft or such as that illustrated in Fig. l. Automatic feeding de- Tices may also be employed, but as such features do not torni any part oit the present invention, 'they are not here illustrated.

Vvlhile certain features or" the present inoparatus may be employedr rention are more or less specifically illusti'atef, wish it understood that various cha tes in fn-ni and proportion be reso ed to within the scope or the appended claims, similarly that the materials and iinish of the several parts employed may be such as the experience and judgment oit the manufacturer may dic-tate or various uses may demand.

Having thus described my invention, what l, claim and desire to secure by Letters Patent isconcentrator oli the character described compris ag a traine .including a base provided an upstanding bearing and at one side provided with an upright, an arm cef-:tending .inwardly 'from the upper end 'l i 'litorer the base and at its outer provi ed Wit-l1 a` bearing disposed in cal alinenxent with the aforesaid bearon said arm and intermeshing said pinion, a handle connected to the vntal g pan concentric with and secured on the shaft over said upright bearing for rotation with the shaft, said pan consisting of a relatively large, lat imperl'orate bottom, save for the o'i the shaft therethrough, an outwardly flaring rim sect-ion and a plurality of spaced annular superposed rilile members secured to the Haring rim ofy the pa-n and positioned substantially parallel with relation to the bottoni section, whereby to agitato the n'iaterial in the pan upon oscillation o said segmental gear and to effect discharge of the Water and tailings from the pan over the upper edge ot the rim.

2. A concentrator of the character described comprising a trame, a vertically disposed straight shalt journaled in the trame, a pan concentric with and secured on the shaft to rotate therewith, in one true circle of rotation, said pan consisting oi a relativelytlarge, imperiliorate bottom anda relatively 'narrow and outwardly, upwardly flaring rim, a plurality ot spaced annular superposed rillle members secured to the rim of the pan and positioned substantially parallel with relation to the bottom, the uppermost ri'tlle being disposed at the tree edge ot the 'flaring rim, and means 'for transmitting an oscillatingmovement to the shaft and pan whereby to agitate the material and to ellect discharge of the Water and tailings from the pan over the upper riille member and over the upper edge of the rim.

Darin n. BLEAKLEY.

ear tor oscillating the latter, a.

Images