US1071891A - Gold-saving machine. - Google Patents

Description

L. G. DIBEBT.

GOLD SAVING MACHINE.

APPLIOATION FILED 11116.12, 1912.

1,071,891, i Patented Sept. 2, 1913.

3 SHEETSSHEET 1.

IQ} ATTORNEY COLUMBIA PLANOGRAPH cu.,wAsmN 0000000 c.

L. G. DIBERT.

GOLD SAVING MACHINE.

APPLIOATION FILED AUG/.12, 1912.

Patented Sept. 2, 1913.

3 SHEETS-SHEET 2.

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INVENTOR X974 6. X210? BY ATTORNEY COLUMBIA PLANDGIZAPH C0-,\VA5HINOTON, D. 6'

L. G. DIBERT.

GOLD SAVING MACHINE.

APPLIOATION FILED Ammz, 1912.

1 071 91 Patented Sept. 2,1913.

3 SHEETS-SHEET 3.

WITNESSES INVENTOR 4 Amm- BY M 3/ S g 4V ATTORNEY LULU-UIA PLANOGRM'H C0,, WASHINGTON, n. c

LOYD C. DIBERT, OF SAN FRANCISCO, CALIFORNIA.

GOLD-SAVING MACHINE.

Specification of Letters Patent.

:rovnenr.

Ilatcnted Sept. 2, 1913.

Application filed August 12, 1912. Serial No. 714,577.

[ all whom it may concern Be it known that I, LOYD C. DlBERl, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented certain new and useful improvements in Gold-Saving Machines, of which the following is a speci fication.

My invention relates to that class of ma chines for separating precious metals from their associated materials in which shaking tables are employed.

The object of my invention is to provide a sin'iplc, compact, and efficient machine especially adapted for the separation and collection of gold particles, and to this end my invention consists in the novel goldsaving machine which I shall hereinafter fully describe by reference to the accompanying drawings in which Figure 1 is a plan of my machine. Fig. 2 is an elevation of the same looking at the side of the screen-shoe and at the front of the gold-saving table. Fig. 3 is an elevation of the machine, looking at the head of the screen-shoe and at the side of the goldsaving table, the latter being partly in section.

1 is a frame. In the upper portion of the frame is the screen-shoe 2 which is supported upon spring legs 3, located at the corners of its ends, so that it may have an end shake imparted to it. This motion is given it by means of a shaft 4t having a central eccentric orcrank 5, from which a connecting rod (3 extends to the head end of the screen-shoe frame, as is best seen in Fig. 2. The shoe 2 has within its upper portion a screen 7 inclined in the direction of its length. At the head of the screen is a feed receiving plate 8, adapted to receive the material from a feed hopper 9 carried by the frame 1 above said plate. The remainder of the screen 7 is divided into transversezones by cross plates 10 which are adapted to receive the water from the nozzles 11 of the water pipe system 12. In this water system are several cocks 13 which are so disposed as to provide for the regulation of the water supply in accordance with the needs of the machine. One set of nozzles 1a of the water system are arranged to discharge into the hopper 9, a suitable battle plate 15 being there provided, as seen clearly by dotted lines in Fig. 2, to receive the direct impact of the water.

At the lower end of the screen is the chute 16 for the coarse material. Under the screen is the delivery chute 17 for the screened material. This chute is inclined and is directed to and opens out at one side of the screen shoe, as is best shown in Fig. 2. In addition to the end shake movement of the screen-shoe 2, it has given to it a jarring movement by rapid blows of a double ended knocker 18 vibrated by a rocking shaft 19 suspended adjustably from hangers 90 of the frame 1, and rocked by the end-shake of the screen-shoe by means of a crank arm 21 extending down from it and slidably connected to the shoe frame by means of a roller stud 22 working between guides 23, as seen in Fig. 2. T he blows of the knocker 18 are delivered upon suitable studs 24; in the central bar of the screen-shoe. Below the screenshoe and imlependent thereof, save that the power to drive them is commen to both, is the goldsaving table 25. This table is also inclined, but it is disposed in the frame 1 at right angles to the screen-shoe, its head being adapted to re ccive the screened material and water from the side delivery chute 17 of said screenshoe, and its foot being extended to discharge its lead clear of the machine. The table 25 has in general a side-shake, that is a vibration in the direction of its width, said motion being imparted to it by the shaft 1, through an eccentric 26 and connecting rod 27 near one end of the shaft, and another eccentric 2S and connecting rod 29 near the other end of the shaft.

As will be seen by reference to Fig. 2, the table 25 is mounted upon spring legs 30, the peculiarity of which is that they diverge or incline outward and downward. The effect of this downward (flivcrgence of the legs 30 is to give to the table a very different movement than if they were vertically arranged. in the divergent disposition, it will be seen that if we suppose, in Fig. 2, the table .25 to be moving to the left, the right side of the table must move down while the left side must move up, because the spring legs on the right are moving through a descending arc, while those on the left are moving through an ascending are. The reverse of this is true when the l. t) O to. the head of the table, in order to better overcome the tendency of the materialv to pack at said head, which tendency it has on account of its recent delivery fromthe screen-shoe above, and because it has at that time not been subjected to. such agitation as would induce the separation of its component particles in accordance with their diiferent coefficients of gravity. This increased movement at the head I here effect by making the eccentric 26 at that end of greater throw than the eccentric 28 at the other end, as I have clearly shown in Fig. 3.

The construction of the gold-saving table 25, I shall now describe. It is of angular trougl1like section. From its head clownward through a considerable distance its bottom is covered with a fabric or woven material of some nature. This covering I have shown by 31, and I have found in practies that carpet is a good material to use, in that it is well adapted to insnare the fine particles of; gold. This carpet is held in place by a border of molding 32, as seen in Figs. 2 and 3, and by cross cleats 33, which also serve to a certain extent as rifiles. Lightly hinged swinging gates 3t are suspended in the table-sides, their lower edges resting on the carpet 31. These are best made of light sheets of metal. Below the carpet zone are the cross riflies 35. These be in any suitable number. They are concaved in cross section, as seen in Fig. 3, to form cups to receive the flow of the material. Their shape adapts them to receive and hold a small body of quicksilver, which, in practice, I place in them, in order to catch the precious particles. These ritiles 35 are best formed with respect to their length, as I have shown in Fig. 2; that is, instead of extending straight across they incline downwardly from each side to the center in an exaggerated V-shape- The riffle zone 35 is ended by a cross barrier. 36 of an elevation suflicient to present a decided obstruction to the flow. Following this barrier 36 and between it and an end barrier 37 is an amalgam or copper plate 38, which forms the final device to catch the precious particles. Means are provided as follows to vary the inclination of the table 25. The table frame proper is carried between the sides 39 of an outer frame. Long bolts 10 clamp these sides upon the table and hold sage of the lighter particles.

it at any inclination. By manipulating the nuts 41-1, the bolts 40 may be loosened to change the inclination of the table as desired.

The gold bearing material and Water are fed through the hopper 9 to the head of the end-shaking screen-shoe 2. They fall on the head plate 8 and then pass on to the screen 7. In the course of the material over the several zones of the screen, it is met by succhute lOwhile the former, passing through the screen falls into the chute 17 and by saidehute is delivered upon the head of the gold saving table 25. Here, being subjected to'the greater agitation at the head of the table, it at once is lightened up, so that its particles separating, the heavier fall into and are caught in the nap of the carpet 31. The materi alpassing down by and under the swinging gate 3a is somewhat checked and is rather evenly spread out and kept light, so that coming to the cup-riiiies 35 and therein turning around and back to low over and out of said riftles the precious particles are caught by the quicksilver which they hold, a result somewhat height ened by the general ei-shape of the rilfle series, in that the tendency here is to flow centrally as well as forwardly; The cross barrier 36 checks the flow and compels the overflow of the material, thereby tending to retain the heavier while permitting the pas precious particles as will amalgamate will be caught by the plate 38, and such as will not amal'gamate will lodge against the final barrier 37. The rocking movement given to the table 25 by reason of the divergent legs which. carry it is very efiicient in keeping the material suspended.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent is 1. In a gold saving machine, the combination of a horizontally disposed screen shoe inclining inthe direction of its length and having a discharge chute extending- Finally such stantially between the shoe and table and extending transversely relative to the shoe, pitman rods one for the shoe and for the table each having eccentric connections with said shaft and adapted to simultaneously impart shaking movements to the shoe and table in relative transverse directions aboutthe'ir yieldable supports.

In a gold saving machine, the con'ibina tion of an elongated table inclining in the direction of its length, spring legs for supporting said table at opposite ends, said legs diverging downwardly, a rotary shaft extending longitudinally of the table, an eccentric adjacent each end of said shaft, a rod connected at one end. to one of said eecentrics, and at its opposite end to the side of the table, adjacent one end thereof, and a rod connected at one end to the other eccentric and at its opposite end to the same side of the table adjacentits opposite end, one of said eccentrics being of greater throw than the other, substantially as and for the purpose described.

In a gold saving machine, the combination of an elongated table inclining in the direction of its length, spring legs for supporting said table at opposite ends, said legs diverging downwardly, a rotary shaft extending longitudinally of the table, an eccentric adjacent each end of said shaft, a rod connected at one end to one of said eccentrics, and at its opposite end to the side of the table, adjacent one end thereof, and a rod connected at one end to the other eccentric and at its opposite end to the same side of the table adjacent its opposite end, the said eccentrics being of different throws, a screen above the table, a shoe interposed between the screen and table to deliver the screened material to the latter, an auxiliary eccentric on the shaft intermediate the first mentioned eccentrics, and a rod connected at one end to the auxiliary eccentric and at its opposite end to the end of said screen.

4. In a gold saving machine the combination of a horizontally disposed screen shoe inclining in the direction of its length and having a discharge chute extending from end to end with an outlet si'ibstant'ially midway of the ends of the shoe and to the side thereof, a gold saving table extending transversely relative to the shoe and of a width greater than the discharge outlet of the shoe and less than the length of the latter, the head of the table being directly beneath the discharge outlet and the table inclining from this point downwardly, yieldable supports for the shoe and table, a rotatable shaft arranged at a point: substantially between the shoe and table and extending transversely relative to the shoe, a pitnian rod substantially midway of the ends of the shaft having an eccentric connection at one end with said shaft, and a connection at its opposite end with the shoe, and auxiliary pitnian rods one adjacent each end of the shaft, the auxiliary pitinan rods having an eccentric connection at one end to the shaft and a connection at the opposite end with the side of the table, one of said auxiliary pitnian rods being of greater throw than the other, substantially as and for the purpose described.

:7. In a gold-saving machine, a table; a zone of carpet at the receiving end of the table; hinged hanging gates resting their lower edges on the carpet; a zone of quicksilver-holding ritlles secured to a table at a point succeeding the carpet zone, said ritlles being concave in section facing the flow of the material and inclined with the direction of said flow from sides to center of the table; a cross-barrier projecting upwardly from the table and of a height greater than the height of said rillles succeeding the ritlle zone; an amalgam plate positioned on the table at a point succeeding the cross barrier; a second crossbz'n'rier projecting upwardly at the lower end of the plate, the said table inclining in the direction of its length, and means for imparting transverse agitation thereto, the agitation at one end of the table being greater than at the other end thereof.

(5. In a gold saving machine, the combination of a screen shoe having at one end a (lischarge chute and at one side a delivery chute underlying the screen surface, a table underlying the chute to receive the screened material therefrom, a common drive means for imparting shaking movements to the table and screen shoe, a knocker for delivering blows upon the screen shoe to jar it, said knocker being actuated by the said shaking movement of the shoe.

7. In a gold saving machine, the combination of an elongated table inclining in the direction of its length, means for imparting transverse shaking movement to the table at one end, and means for imparting a relatively increased transverse shaking movement at the opposite end thereof, the said table being trough shaped in cross section and having on the upper surface of ts bottom a layer of gold saving fabric, vertically disposed cross ritlles, and a transversely extending barrier, the cross rillles being of greater height than the fabric and the obstruction of greater height than the cross ritlles.

S. In a gold saving machine, the combination of an elongated table inclining in the direction of its length, spring legs for supporting said table at opposite ends, eccentric driving means adjacent opposite ends of the table for imparting transverse shaking movement, that movement at one end of the table being greater than that at the 0pposite end thereof, a zone of carpet on the upper surface of the bottom of the table adname to this specification in the presence of acent the receiving end thereot, hlnged two subscr-l-bmg- Witnesses.

hanging gates resting at their lower ed ge on LOYD G DIBERT the carpet, a series of cross tithes succeeding 5 the carpet Zone, and an amalgam plate suc- Witnesses:

ceedingthe riflie zone. WM. F. BOOTH,

In. testimony whereof I have signed my D, B. RICHARDS.

Copies oi this patent may be obtained for five qencs eaeh, hy addressing the 'CQ B of P t nts. Washington, D. (3

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