US537945A - William tarrant - Google Patents

Description

(No Model.)

W. TARRANT. GONGENTRATOR.

No. 537,945. Patented Apr. 23, 189 5.

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NVILLIAM TARRANT, OF PETERSHAM, NElV SOUTH WALES.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 537,945, dated April 23, 1895.

Application filed October 6, 1894:.

To all whom it may concern.-

Be it known that I, WILLIAM TARRANT, mining engineer, a subject of the Queen of Great Britain, residing at Weston Street, Petersham, near Sydney, in the British Colony of New South Wales, have invented a new and useful Concentrator, of which the following is a specification.

This invention relates to an improved shaking-table machine for concentrating finely divided or discrete metalliferous material caused to flow through such machine with water and (when the shaking table is formed of amalgamating plates) for amalgamating gold and silver contained in such material.

This invention has been devised in order to produce a cheaply constructed and easily operated machine for such purposes.

This improved shakingtable concentrating machine usable also as an amalgamator is constructed with a circular shelving plane or table or inverted conical dish to which a shaking and percussive motion is imparted to which the material to be treated is continuously fed and from which there is a continuous discharge of the gangue and preferably from which there is a regularly intermittent discharge of concentrates; but in order that this invention may be clearly understood reference will now be made to the drawings herewith, in which Figure 1 is a central sectional elevation of a concentrating machine constructed according to this said invention, and Fig. 2 is a plan partly in section of the same.

The circular table or conical dishA is sup ported on ring or hoop A having cross stays A and which ring is suspended by hooks A to bars or bracket pieces A from the main framing and is pivoted by eye piece A on pivot bracket A also on the main framing. Diametrically opposite to the pivot is a pin piece A on which takes the end of connecting rod B to a crank pin B in disk B on main shaft or spindle B in bearings B on the main framing. Brackets or L-pieces A from the framing hold on bolts A india rubber blocks A forming bulfers to impart the percussive motion to the table or dish when it is reciprocated by the revolution of main shaft B. A conical distributing surface or spreader O is supported by a subsidiary upper framing $erial No. 525,124. (No model.)

contents level of the table or dish A and hango5 ing below that level is a ring]? of blariketing or other woolen or fibrous material which is sewed on to ring or hoop F through holes therein said ring or hoop being soldered or otherwise fixed on the under side of distribu- 7o ter or spreader O.

A machine constructed as described and explained would work effectually though the concentrates gathered on the table or dish A around pipe D would have to be withdrawn by an attendant at intervals as required through a door or closing piece to passage E; but it is preferable that the discharge of concentrates should be automatic and this is brought about by the mechanism now to be described.

The passage E terminates in a valve seating E against which takes valve piece E fixed on pipe D. This pipeD carries a basin or director E above the receiver or receptacle E having inclined bottom E valve E are intermittently raised and lowered by lever E on fulcrum pin E on bracket E which lever has back spring E under compression so that the tendency is for said lever to keep valve E to its seat E and passage E on closed. The back end of lever E is connected by link E having ball and socket joint E thereto to bell crank E by other ball and socket joint E and this bell crank has U- connection E to rod E from crank pin in 5 disk E on secondary shaft or spindle E on bearings E and driven through pulleys E and B so that it will revolve considerably slower than main shaft B. The rod E may be lifted from its U-connection E with bell I00 crank E by hand lever E on spindle E actuating lever E so that the motion of lever E will cease and the intermittent opening of passage E be prevented. The shaft B may be Through the center of 55 This pipe D passes through an 60 The pipe D and driven by any suitable means although as preferable cone pulleys B are shown to be driven from a counter shaft. The main framin g consists of sole longitudinal beams G, sole cross beams G uprights G, top longitudinals G top cross beams G and subsidiary piece G and the upper framing consists of uprights G cross pieces G and bearers G In operation the material to be treated is fed with water into hopper O and falling through grating or sieve C is distributed or spread by passing down the cone surface 0 dropping upon the outer part of the-table or dish A. This table or dish fills with the water and material to the top of pipe D when the discharge .of the gangue or waste commences and then any floating gold or surface mineral has to pass the trailing edge of the blanket ring F -before discharge is reached and by the nature of the blanketing or woolen or fibrous material such valuable particles are detained and caused to settle upon the table or dish A whence they will pass to the concentrates dis- 5 charge. The heavier particles or concentrates pass down the inclined plane of the table or dish A and would gather around pipe D but for the automatic discharge which as hereinbefore explained is the regular but intermittent opening of the valve E on seating E at bottom of discharge passage E. The gangue or waste passing down pipe D flows through the launder D to where required while the concentrates falling through passage E are directed by basin E into receptacle E up the inclined bottom E of which they may be raked or scraped when desired or necessary.

In use as an amalgamator and concentrator the distributor or spreader O is made of amalgamating or copper plates and in use as an amalgamator alone the table or dish A would likewise be made of amalgamating or copper plates.

Having now particularly described and explained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In combination with the inverted conical table A, a conical feed plate 0 covering the table A except at the edge and a ring of fibrous material projecting from the under surface of the feed plate 0, substantially as described.

2. In a concentrating machine of the class set forth the combination and arrangement with a table or dish A having a peripheral feed a discharge pipe D and a discharge opening E of a valve seating E and a valve piece E on said discharge pipe D and devices by which such valve piece E is regularly intermittently lifted off and on its seat such as E substantially as herein described and explained and as illustrated in the drawings.

, 3. In combination with the table A, the discharge D, the discharge E, the valve closing the latter discharge, means for controlling said discharge, the receptacle E and the deflector or basin E", substantially as described.

WILLIAM TARRANT. Witnesses:

FRED WALSH, THOMAS J AMES WARD.

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