US423502A - Thomas william watson - Google Patents

Description

(No Model.)

T. W. WATSON & T. DENNY. GRINDING AND AMALGAMATING MAGHINE.

No. 423,502. PatentedMar. 18, 1890.

Invenbrr I 725% Mpmy To all wh'om it may concern:

V UNITED STATES PATENT OEEIcE.

THOMAS WILLIAM WATSON, OF ST. ARNAUD, AND THOMAS DENNY, OF I SOUTH YARRA, ASSIGNORS TO THE WATSON & DENNY GOLD AND SILVER EXTRACTING COMPANY, (LIMITED) OF MELBOURNE, VICTORIA.

GRINDING AND AMALGAMATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 423,502, dated March 18, 1890.

Application filed July 18, 1888. Serial No.280, 383. (No model.) Patented in Victoria October 19, 1885, No. 4,285 in New South Wales July 29, 1886; in Queensland November 17, 1886, No- 136; in South Australia March 28, 1887, No. 786; in Tasmania October 6, 1887, No. 496/9, and in New Zealand October 18, 1887, No. 2,588-

Be It known that we, THOMAS WVILLIAM WATSON and THOMAS DENNY, subjects of the Queen of Great Britain, residing, respectively, at St. Arnaud, in the British colony of Victoria, and at- 93 Chapel street, South Yarra, in the said colony, have invented new and useful Improvements in Grinding and Amalgamating Machines, (for which we have obtained patents in the following British colonies: Victoria, dated October 19, 1885, No. 41,285; New South Wales, July 29, 1886, but unnumbered; Queensland, November 17, 1886, No. 136 South Australia, March 28, 1887, No. 786 Tasmania, October 6, 1887, No. 496! 9, and New Zealand, October 18, 1887, No. 2,588,) of which the following is a specification.

This invention relates to improvements in combined grinding, classifying, and amalgamating machines, and is designed to produce a machine which will reduce to an almost impalpable powder all descriptions of ores, but especially those containing gold and silver; and the improvements consist, first, in forming the working-surfaces of the upper and lower grinding-segments of a corrugated section, so as to have a larger surface through which the material under treatment has to pass, second, in arranging the bottom of the pan and the lower segments in such a manner as that there is aclear space between them in which to place mercury for amalgamating purposes, and, third, in the peculiar construction of the overflow-classifier, which reduces to a minimum the possibility of losving any of the precious metals.

These improvements maybe applied to any description of pan which works on the millstone. principle; but the grinding-pans to which our first and second improvements are specially applicable are those which have a central vertical revolving spindle, which carries a circular plate, to the under side of which the upper segments are afiixed. The lower corrugated surfaces of these segments grind and work upon the lower segments of a similar section placed at the bottom of the 'ner ends are supported upon it.

pan, which is itself circularl By forming the grinding-surfaces of a corrugated section, as described in the first improvement, it is nearly impossible for the material under the bottom of the lower segments, whose in Thus the Vertical section of the space between the pan and lower segment assumes that of an elongated wedge, and the outer ends of the lower segments are held up to their horizontal position either by forming a ring at the bottom of the pan or on the bottom of the segments themselves.

The third improvement, relating to the overflow-classifier, is applicable to any description of grinder-pan or amalgamating machine, and consists in forming at the outside of the machine, around the overflow-opening, a box or cistern whose three sides taper toward its bottom at-an angle of about fifty to sixty-five degrees, and such bottom has an opening in it which leads to the pan slightly above or in a line with the corrugated grinding-surfaces. By this means the outflowing material from the pan has to pass through the still water in the classifier, which thus enables the heavier particles of ores or precious metals to fall by gravity to the bottom, whence they are led back to the pan through the lower opening, while the waste materialpasses away from the classifier through the overflow at its top. It is evident that 'by this means much precious material is saved that would otherwise be lost.

Although there may be a degree of similarity between the general appearance of our machine and those in common use, still we claim to'have produced a useful and meritorious invent-ion, with which the millions of tons of auriferous failings now lying idle on the surface of all gold-fields may be worked economically and expeditiously, at the same time yielding large profits, whereas with all known appliances the gold contained in such auriferou's failings could only be extracted at a'cost consi'd-erably in excess of their Value.

The drawings hereto attached illustrate at Figure 1 a part plan, and at Fig. 2 a central section, of a machine having our improvements embodied in it. Fig. 3 isa plan of the lower corrugated segment; and Fig. 4, a longitudinal section of it, showing a circular cortion showing an angular corrugation.

In the drawings, A is the pan, and A its bottom; B, the space forming the mercurywell; 0, the lower segmental grinding-plate; D, the upper segmental grinding-plate attached to the rotary carrying-plate E, which is supported by the tubular carrier E, secured upon the central vertic'al spindle E ,:to which motion is imparted by bevel gearing' 'Eflth epinion-of which is' 'on' the layrshaft E 1 The segments forming the u per grindingplate nave secured to the carrying-plate E- in anyapproved manner, while the bottom segments 0 have: at their'bottom the rib O to raise them to a horizontal position and allow, space for the mercury-well.

Th'e'iiiner'wall of the classifier F is formed,

' p'l fei ablwby'the sid e'of the pan, While its anil leads to the hole F outerwal'l's are'formed" by the box F, which tapers at an angleof from fifty .to sixty-five degrees-nearly to a point at its bottom nd, between it and the F 'is' the inlet-hole to classifier,'and" F the waste discharge or overflow from it, and F is the divergent plate at top of classifier.

The operation of our machine is as follows: The material to be'treatedis fed intothe pan with the necessary quantity of water, and by thecurrents' therein carried] to between the corrugated segmental grinding-plates D and C, while the liberated metal .falls and is brouglitinto contact with the mercury in the well B. The groundmate'rialescapes through the opening F near top of pan to the classifier', and owing t'o'the'agit-ation at this point 7 a large percentage of coarse grains'are carriedinto the classifier and in the ordinary Way would flow away to the waste-heap;- but the material passing from the agitated Water in the pan to the still water of the classifier causes the heavy and not sufficiently-ground particles to fall to the-bottom of the classifier, when, by the influence of the currents, they re-enter the pan through the opening F and thence between thecorrugated grinding-surfaces D and O until'each particle is sufficiently fine to float with the current over the still water of the classifierdischarge F, and thence to the waste-heap.

The adjusting-board F fitted into the classifier near its one end, is designed to regulate the discharge of themat-erial under treatment'to any desired degree of fineness, and

the diverting-board F is to divert the current passing from F to F causing it to pass under the lower edge of the diverting-board F",

,by which means the very finest particles of Qm'etal, as well as coarse particles" of ore, are -made to sink.

' Having thus described the nature of our invention and the manner of performing same,

we would have it understood that what we believe to be new, and therefore claim as our g improvements in combined grinding, classifyrugation, While Fig. 5 1s a longitudlnal sec ing, and amalgamating machines, is

1. The combinatiomin an ore crusher and famal'gamator, of a pan ha ving" a' pofrt'i'on of its bottom from the axis toward the periphery inclined and thence to the periphery horilzontal, a stationary crushing-disk provided with feet 0 near its periphery,resting-on said ,bo't'tom to form an amalgamating-chagbelow said disk, and" a revoluble crus ,disk cObpe'ratihg withthe stationary disk; substantially as and for thepurposespfeeified".

, 2'. The combination, in more crusher and amalgamaton'of apa'nprovided with anf a'xial tubular vertical bearing and bottom? extending on an inclined plane from the bearing toward the periphery and thence on a :horizontal plane to said periphery, a} revoln ble shaft extending throughsaidbeaiihgand marrying atubular support encompassing the tubular bearing, a grinding difsk connectedwith the tubular support, antia stationary grinding-disk provided- Wit'h feet- 0' near its 5 periphery, said stationary grinding-disk rest- Iingon the bottom of the pa'n'and'being-adapted to co-operate with the revoluble' grindingdisk, substantially asfor the purpose specified; 3. The combination, in an ore crusherand amalgamator, of a anrewmme crushihg devices arranged therein and near the bot tom thereof, and a classifying or settling chamber on the outside of the pan and-in communication therewith byaport near-the upper edge of the pan and aport'at' or near the bottom of said pan, said' chamber hav'ing' inclined walls to dire otthe subsiu'ingmate:

rial to the lower part, and a diverting-board projecting from above intofls'aid chamber i'n front of the upper port, substantially as'and' for the purposes specified.

THOMAS WILLIAM w'A'T'soN. THOS. DENNY.

Watson: Y

WALTER SMYTHE BAYsToN, WALTER-CHARLES HART.

ITO

Witnesses to signature of 'lhomasDenny':

FREDERICK MARTIN,

Waukar-mga, Purser to Alma .Mt'ne.

JOHN SOUTHEY PATnRson,

Mme Manager, Waukarmga.

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