An Improved Shaking Table Concentrating Machine, usable' also as an Amalgamator
Year: 1894

page_text: COMPLETE SPECIFICATION:
An Improved Shaking Table Concentrating Machine, usable' also as
an Amalgamator
I, WILLIAM TARRANT, of Weston Street, Petersham near Sydney in the
Colony of New South Wales, Mining Engineer, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
43.
This invention relates to an improved shaking-table machine,for concentrating
finely divided or discrete metalliferons 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 shaking-table 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 Figure 2
is a plan partly in section of the same.
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The circular table or conical dish A is supported on ring or hoop A having
cross stays A and which ringis suspended by hooks A to bars or bracket
pieces A from the main framing andhie pivotted by eye piece A on pivot
bracket A also on the main framing. Diametrically opposite to the pivot is a pin
piece Aon which takes the end of connecting rod B to a crank pin B, whose
throw is preferably adjustable in a slot, in dise B on main shaft or spindle Bir
bearings B on the main framing. Brackets or L-pieces A' from the framing
hold on bolts 'A', india rubber blocks A forming buffors to lipitit the percussive
motion "to the table or dish when it is reciprocated by the revolution" of maid
shaft B. A conical distributing surface or spreader C is supported by a subsidiary
upper-framing above the table or dish A and has above its apex a hopper C
having preferably within it agrating or sieve C. Through the centre of the table
ondish A a discharge pipe Diprotrudes upwardly, not quite to the level of the top
edge of said tablet or dish so that the discharge of said table or dish takes
place from that level. This pipe D passes through an annular discharge..
passage E for the concentrates and extends downwardly through a receiver for
said concentrates to a launder or trough D to: waste. Suspended, above the
contents: level of the table or dish! A and hanging below that level is a ring F
of blanketing or other woollen or-fibrous 'material which is sewn on to ring or
hoop through holes therein 'said ring or hoop being soldered or otherwise
fixed on the underside of distributor or spreader G. A machine constricted asi
described and explained: would work effectually, though the concentrates gathered
on the table or dish A around piper 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 tho mebhanism now to be described. The passage E
terminates in a valve seating El against which takes valve piece E fixed on þipe D...
This pipe D carries basin or director E* above the receiver or receptacle Er..

page_text: having inclined bottom E. The pipe D and 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 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 slotted disc E" on secondary shaft or spindle E on
bearings E and driven by belt around 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 crank E" by hand lever E on spindle E actuating
lever E18 so that the motion of lever E³ will cease and the intermittent opening
of passage E be prevented. The shaft B may be driven by any suitable means
although as preferable cone pulleys B are shown to be driven from a counter
shaft. The main fraining consists of sole longitudinal beams G' sole cross
beams G uprights G top longitudinals G top cross beams G₁ and subsidiary
piece G and the upper framing consists of uprights G cross pieces G and
bearers Go!
In operation, the material to be treated is fed with water into hopper C and
falling through grating or sieve C' is distributed or spread by passing down the
cone surface C 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 gaugue or waste commences and then any floating gold or surface mineral
has to pass the trailing edge of the blanket ring I before discharge is reached and
by the nature of the blanketing or woollen 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 discharge. 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 herein before 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 E³
are directed by basin E into receptacle E up the inclined bottom E of which
they may be ruked or scraped when desired or necessary.
In use 88 an
amalgamator and concentrator, the distributor or spreader C 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 ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what. I
claim is
First. An improved shaking-table concentrating machine usable also as an
amalgamator consisting of a circular shelving plane or table or inverted. conical
dish having shaking or percussive motion or both to which table or dish there is an
outside or peripheral feed and from which there is a central discharge for tailings
and a central discharge for concentrates substantially as herein described and
explained.
Second. In a concentrating machine of the class set forth the combination and
arrangement with a circular shelving plane or table or inverted conical dish having
motion a peripheral feed and a central discharge of a ring of blanket or other
woollen or fibrous material dipping below the normal level of the contents of said
table or dish substantially as herein described and explained.
Third. In a concentrating machine of the class set forth the combination and
arrangement with a table or dish such as A fixed to ring or hoop such as A having
cross stays such as A of suspending hooks such as Apivot such as A* pin piece
such as A connecting rod such as B crank pin such as B disc such as B¹ and
shaft or spindle such as B substantially as berein described and explained and as
illustrated in the drawing.

page_text: Fourth. In a concentrating machine of the class set forth the combination and
arrangement with parts such as those set out in the preceding (third) claiming
clause of india rubber blocks or buffers such as A' on bolts such as A on bracket
pieces such as A substantially as herein described and explained and as illustrated
in the drawing.
Fifth. In a concentrating machine of the class set forth the combination and
arrangement with a table or dish such as A having central discharge pipe such
as D and discharge opening such as E of distributing cone or spreader such as C
having hopper such as C and preferably sieve or grating such as C' substantially
as herein described and explained and as illustrated in the drawing.
Sixth. In a concentrating machine of the class set forth the combination and
arrangement with a table or dish such as A having a peripheral feed a discharge
pipe such as D and a discharge opening such as E of a valve seating such as E
and a valve piece such as E on said discharge pipe such as D and devices by
which such valve piece such as E' is regularly intermittently lifted off and on its
seat such as E' substantially as herein described and explained and as illustrated
in the drawing.
Seventh. In a concentrating machine of the class set forth the combination and
arrangement with a discharge pipe such as D discharge opening such as E valve
seating such as Eland valve such as E' of a lever such as E connecting link such
as E with ball and socket connections at its either end and bell crank such as Ell
to which reciprocating motion is imparted substantially as herein described and
explained and as illustrated in the drawing.
Eighth. The particular combination and arrangement of mechanical parts all
together forming a concentrating machine an amalgamating and concentrating
machine or an amalgamating machine substantially as herein described and
explained and as illustrated in the drawing.
Dated this Twenty-seventh day of August One thousand eight hundred and
ninety-four
WILLIAM TARRANT.
Wm. P. Thompson & Co.,
Agents.