US1256764A - Fine-gold-saving machine. - Google Patents

Description

- E. BAGLEY,

FINE GOLD SAVING MAUHINL APPL'ICATKON mm MAY 24. 911.

1,256,764. Patented Feb. 19, 1918.

INVENTOR -ment the customary screen, settles in the .are, the

' mated UNITED sTA'rEs PA .TEN T OFFICE FINE-GOLD-SAVING MACHINE,

Application filed May 24, 1917.

To all whom it may concern:

Be it known that I, Row-Ann Enemy, a subject of the King of Great Britain, residing at Vancouver, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Fine- G-old-Saving Machines, of which the following is a specification.

This invention relates to recovery of fine gold from t L, sand or gravel of river bench 1 beds or of beaches, and dos" nod to supple-- ground sluicing; methods, by recovering the fine gold from the dirt in a simple and effective manner be fore delivery of the same to the sluice boxes or other goldrecovery means.

While the machines in common use will recover ordinary fine gold considerable loss is unavoidably sustained ofthe line gold carried in suspension by thewater washing (whine :t'or the tl 1c gravel.

Tn the machine, which is the subject of this a g'pplicatiomtms loss is overcome by con-- tinuously delivering the wash dirt through a revolving cylindrical screen of wirevinesh set at a slight incline within :1 tank of water which is quiescent to the extent that there is no sensible flow through it. The gravel as washed is "delivered to the sluice boxes for recovery of any coarse gold, and the fine sand, washed t rough the mesh of the corrugated bottom of the tank 'in which the screen rotates and. is loosened and continuously worked toward the lower end by angled blades securedto and projecting radially from the frame work of the cylindrical screen.

Free quicksilver is placed in parallel rifiles or corrugations of the tank and amalgamated plates arb distributed at intervals apart therein, so that any fine or float gold settling with the sand is recovered during progression of this sand to the lower end of the tank and the sand is delivered there-- from through a distributor over amalgalates and finally over concentrating tables or the recovery of any black sand or other value carrying metals.

The important jfeatures of the invention rimary washing of the dirt in substantially quiescent watc and the separation of the fine sand from the gravel before delivery of the latter to the sluiccs: the

provisionof amalgamating means Within the tank and the loosening of the sand by Specification of Letters Patent 'lS a cylindrical wire mesh screen 2 Pat-on 19.1918. Serial No. 170,757.

in 1* 1g. 5, looking in the direction oi the arrow.

3 a cross scctionon the line 3-3 in Fig. 1 looking ll] the direction of the arrow 3, and

Fig. 4 is a plan of the distributor.

In. tl'ese drawings 9 represents a semi cylindrical tank of corrugated metal, which suitably supported at aslight incline within the frame 10 to which the several parts of the machine are'attached or connested. Rot-atably mounted concentric with this tank 9 and at a corresponding incline which is secured in sections "on an angle iron frame extending between the ends 3 and 4 by which it is supported. One end 3 of this screen is centrally apertured at ,5 to receive a chute 6 through which the washed dirt is delivered to within the screen and this end 3 is supported on rollers 23 to rotate on the axis of the screen under the action of a worm l7 engaging the teeth of a worm wheel secured to or integral with the upper end 3.

The lower end 4 of the screen is supported on the outwardly proj ecting, end of a shaft 7 which passes through its center and is carried in a bearing 8 on the frame 10. From the lower end of the tank 9 a pipe 11 controlled by a stop-cock delivers into the ccntral basin 12 of a distributor 13, and into the upper end is inserted a water service pipe 14 to replace the water withdrawn with the send. through the pipe 11.

Secured to the ends 3 and 4 of the screen where they project beyond the circumference thereof, and to an intermediate support, if necessary, axis ofrotntion of the screen and on these bars blades-16 are secured at intervals apart to project radially to just clear the inside of the tank 9. These blades are angled slightly to progress the sand gradually over the corrugations of the tank toward the lower end.

In the lower ehd 4 of the screen are diametrically opposed circumferentially elonare bars 15.paral1"e1 to the 35 corned, the sandLWhich passes gated apertures 18, the following sides of which in the irection of rotation have. scoops 19 projecting into the interior of the screen, which divert the washed gravel from the screen into passages 20 in the end. 4, which passages being separated from one another elevate the gravel above the level of the tank as the screen rotates and deliver it through openings 21 onto a chute 22 for delivery into sluice boxes for the recovery of coarser gold.

It must be distinctly understood, that, as stated in the preamble to this specification, the machine is specifically designed for Washing the finer sand and its contained values from the coarser gravel, and for the recovery of any fine gold from the sand so I Washed.

material to the lower end In use, the Washed dirt is delivered through the chute 6 to within the cylindrical. screen 2 which operates within. the tank 9 and this tank is maintained full of Water to the level of its lower upper edge. The rotation of this screen at an incline carries the during which movement in water the fine sand with which the gravel is associated is washed from it and passes through the interstices of the 1 screen: into'thetank 9, while the Washed gravel. is withdrawn from the lower end of the scree'nthroughthe scoop outlets 18 and passagesj20,- 21' and is delivered over the chute 22 tc the sluice boxes.

Y carry gold and other values As'the waterin -the tank '9 is practically quiescent'sofai as current or flow is conthrough. the screen and-any fine gold or blackrsand associated with it, Will settle in the bottom of the tank an'dis continuously loosened by the blades 16 thati'the heavier metal may pass through it to come in contact and be amalgarnated' with. the :free quicksilver in the riflies of the bottom of the tank, or to adhere to any of the amalgamated plates 25 dis-- posed therearound. The sand is simultaneouslv progressed slowly by the angle of these blades toward the lower end of. the tank Where'it may be drawn-off continuously or at intervals as desired, through the pipe 11 to be distributed over the surfaceof the amalgamatingplates 23 of the concentrating tables'24 to recover any escaping particles 1 gold amalgam and the black sand or the An important feature or the invention lies in the fact that thefine sand which may is washed from the gravel, to be separately treated, and

' therefore the gold saving means suited to the recovery of fine gold, is not subjected to the scour and wear of the heavier gravel: Furare necessarily heavier to sweep the int rior -'washed to Within the rotatab in comhi nation,

the concentration is rendered more easy of accomplishment, as the particles of amalgam and co lect more readily than flour gold.

Having now particularly described my in.- vention, I hereby declare that What I claim as new and desire to be protected in by Letters Patent, is:

1. A gold washing machine, comprising in combination, an elongated tank having, a reduced area adjacent the bottom and rifiles across that reduced area, said tank being provided with a delivery aperture from the bottom of one end and a Water delivery adjacent the other end, a cylindrical screen rotab'lc Within the length of the tank-on an axis of rotation substantially parallel to the bottom of the tank, said screen having angled blades projecting outwardly from it, a chute delivering the gravel to be washed within the screen, means for delivering the Washed gravel from the opposite end of the screen, and means within the tank for amalgamating with quicksilver an y fine gold that may pass through the screen, the said delivery aperture being restricted and adapted to maintain a body of pulp in the tank in contact with the screen and the blades thereon substantially as shown'and described.

2. A gold washing machine, comprising in combination, a semi-cylindrical tank having circumferential corrugations, said tank having a discharge aperture at the bottom of one end and a Water delivery adjacent the other end, a cylindrical mesh screen rotatably supported within the tank to be concentrio with the bottom of it, said screen having angled blades projecting from its outer side of the tank and "progrcss'the'cont'nts toward the discharge aperture, means for deliverin Y gravel to be e screen, and means for deliyerin, the washed gravel from the opposite'erid o the same. said discharge aperture being restricted a 1d adapted to maintain a body of pulp in the tank in contact with the screen and the blades thereon. 3. A gold-Washing machine, comprising a semi-cylindrical tank having circumferential corrugations, said tank being supported at a slight incline from the horizontal and provided With a discharge aperture at the 'bottom of the lower end and a Water delivery adjacent the upper end, a cylindrical mesh screen rotatably supported with the tank to be substantially concentric with the bottom of i t, screen having angled blades projec a it outside the screen to sweepthe inte ior of the tank and progress the cohtents toward; the lower end, means for delivering gravel to be Washed to within the rotatablescreen'j means for delivering the washed ravel from the opposite end of the same, an means for 4-. A. g old. washing machine (-o1nprising in combination, it semi-cylindrical tank hau' inn (iruin'ii'el ltiul corrugiitions said tank being supported at a slight incline from the i' v r I llOllZOlliill and provided with a eontrolleo discharge aperture at qthe bottom of the lower end and a Water delivery adjacent the upper end, a cylindrical mesh Qn'een rotatably supported within the tank to e substanangled. blades projecting from its outer side to sweep the interior of the tank, means for del i'\-'ering'grave1-t0 be washed to within the rotatable screen, means for delivering the washed gravel from the opposite end of the same, and means within the tank for amalgamating .any fine gold with quicksilver, said discharge aperture being restricted and adapted tomaintain a body of pn'lp in the tank in contact with the screen and the blades thereon. I

In testimony whereof I afiix my signature.

- EDWARD BAGLEY.

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