US474014A - William h - Google Patents

Description

(No Model.)

W. H. HILL. GOLD GONGENTRATOR.

' No. 474,014. Patented May 3, 1892.

Unrrnn STATES PATENT rFicE.

WILLIAM H. HILL, OF ATLANTA, GEORGIA.

GOLD-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 474,014, dated May 3, 1892.

Application filed November 17, 1891. Serial No. 412.235. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM H. HILL, of Atlanta,in the countyof Fulton and State of Georgia, haveinvented certain new and useful Improvements in Gold-Concentrators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon,which form a part of this specification.

This invention relates to devices for obtaining gold from pulverized material, eithernaturally so or made so in any of the well-known pulverizing devices, the d evice being arranged to deposit the gold by gravity in such a position that it may be gathered without the use of quicksilver, attention being also given to so constructing the machine as to render it easily transportable by whatever means are at hand, easily reassembled and set in operation, and operated with economy of water,

the details of construction whereby all these ends are attained being hereinafter fully set forth, and illustrated in the accompanying drawings, in which said drawings Figure 1 is a side elevation of the device, showing a portion of a water-induction pipe. Fig. 2 is an end elevation of the same, the view being taken from the right-hand end of Fig. 1 and further showing the elements of construction shown in said Fig. 1. Fig. 3 is a longitudinal vertical section on the center of the frame, showing the formation and interior construction of parts and more clearly showing the device than either of the previously-described figures. Fig. 4: is a view of the left-hand end of Fig. 1, said View beinga profile only of the end stated, and the object of said figure being to show the means for vertical adjustment of the pan or shaker more clearly than has been heretofore done. Fig. 5 is a detail of the pan proper, said pan proper being the reservoir or sifter attached to the riffle. portion of the pan, and shows the screen, its means forvertical adjustment in the siftercasing, and the sidewise extension of said screen imperforate, for a purpose hereinafter specified. Fig. 6 is a detail in plan of the box carrying the ball-bearing for the wrist-pin of the oscillating crank. Fig. 7 is a vertical cross-section of Fig. 6,showing the conformation of the interior of the said ball-bearing box.

In the figures like reference marks are employed in the designation of corresponding elements of construction.

The frame A may be of any construction, so long as it is adapted to sustain the operative elements, and should be constructed, if compatible with the particular requirements otherwise, so as to be easily knocked down for transportation by packing over mountainous country, as the machine is especially adaptable to prospecting on a large scale, as well as working for the commercial production of gold. In the construction shown the said frame comprises two top and bottom frames a, rectangular in shape and secured together at the proper vertical distance apart by uprights a. Between the side pieces of the top frame a is suitably supported the strainer a which has a perforated bottom 0. and into which said strainer the conduit. a empties its supply of water, which in passing is a much smaller quantity than is generally necessary per ton of gold-carrying material,

which is thought to show a superior precipitating quality of the machine.

The rocker or pan B is somewhat narrower than the inside dimension in width of the frame and is carried and oscillated therein, as will be presently described. This pan, as shown best in Fig. 3, is composed of a bottom portion 1), which has on its top side within the sides I) corrugations or riftles 6 one of which (the riffle h is larger and deeper than the others farther on as the water, 820., progress in operation. The heavier particles of gold settle in this riftle, together with some of the floating gold, while all of the floating gold and the particles dislodged or separated later are precipitated into the other riffles. Seated over the riflie b is a screen 12 composed of a casing having a screen b in its bottom, which is inclined, as shown in Fig. 3, and which inclination is adjustable by moving the higher end of the screen up or down by? raising or lowering the rod 12 secured thereto and held stationary by a screw-clip b passing through the side of the casing and tightened by the thumb-nut shown. The bottom or screen b has an extension D outside ward be shaken off and fall to the ground,

being refuse of the process by reason of being too heavy to pass the riffles, and which should either be pulverized or discarded entirely, according to the average yield of gold therefrom. One end of the pan B is held in a stirrup b suspended upon a screw b ,passing through the top frame a, by a chain 1) while the other end is upheld in such a manner as to have motion endwise and sidewise and in all directions horizontal the combination of such motions by the arm b, which has a universal joint Z9 incorporated in it, one end of said arm being secured to the lower frame a and the other being secured to the pan B, all of which is clearly'shown in Fig. 3.

J ournaled in a bearing-box on a cross-piece of the frame is a shaft 0, which carries a crank c and a pinion c, which said pinion engages with a spur-gear c on the shaft 0 journaled on the frame and carrying a crank for manual operation or a tight and loose pulley or other device for driving from power.

Secured to the end of the pan B is a bearing-box b having a perforated ball in a correspondingly-sph erical seat in its central portion, and through the mentioned hole in this sphere passes the wrist-pin of the crank c, said ball having free play upon said wrist-pin. By means of this construction it is obvious that the pan receives a motion in all directions substantially in a horizontal plane, together with a slight vertical motion owing to and governed by the pivoting and length of the upper member of the arm I), respectively. These motions cause an agitation of the water superiorly adapted to the precipitation of the fine and flake gold and the progression of the water and material along the riffles by a suddenly intermitting motion, which is conducive to the obtaining of the very best results. A sudden jar is given to the pan by its contacting forcibly when in motion with the buffers I), set in the corner-posts of the frame A and preferably, though not necessarily, elastic in their com position,wl1ich sudden jar will cause the certain precipitation of the flake-gold, which would possibly escape otherwise, although it is found that the suddenly-changing intermittent motion of the water will generally cause this precipitation. It is necessary to cause this gold to out below the surface of the water to cause it to fall. The uppermost end of the pan may be raised or lowered by causing the handle Z9 to revolve in the proper direction, and the throw or slosh of the pan may be increased or diminished by changing in the proper direction and degree the throw of the crank c, (the crankarm being slotted and the wrist-pin movable therein, if desired,) which adjustments, together-with the adjustment hereinbefore mentioned, make this device completely adjustable to the needs and wishes of any'operator.

In cleaning the pan the end will be dropped down approximately to the position indicated by broken lines in Fig. 1 and the gold and black sand scraped from the riffies, after which any Well-known separating operation may be performed. 4

In this device the loss of quicksilver by flowering is entirely obviated, as the amalgamation takes place in dry riffles, the watersupply being cut off before the process of amalgamation is commenced. The amalgamation may of course be performed after the gold and sand are placed in a suitable vessel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

In a device of the class specified, a frame and a cradlesuspended therein carrying a spherical bearing-box on its end, a crank and shaft revolubly mounted in said frame, and a perforated ball having end-play upon the wrist-pin of the said crank and seated and freely rotatable within the said spherical bearing-boX for the purpose of imparting to the said cradle the requisite compound motion, for the purpose specified.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM H. HILL.

Witnesses:

A. P. W001), EDWARD P. W001).

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