USRE6165E - Improvement in ore-concentrators - Google Patents

Description

.LHENDY. 0re-Concent raturs No. 6,165. Reissued Der).8,1874.

UNITED, I STATES PATENTOFFIGE.

JOSHUA nnnnr, or sAu r nanorsco, CALIFORNIA.

IMPROVEMENT IN OR E-CONCENTRATORS.

Specification forming part of Letters Patent No.78,089, dated May 19,1868 reissue No. 6,165, dated December 8,

1874; application filed October 15. 1874.

To all whom it may concern:

Be it known that 1, JOSHUA HENDY', of San Francisco, California, have invented a new and Improved Concentrator; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

The nature of my invention is to provide an improved concentrator for saving finely-divided quicksilver, amalgam, and gold from the sands, and for concentrating and saving the sulphurets contained in ores; and consists of an iron frame of peculiar construction, which holds an oscillating pan havin g a curvilinear bottom, with a groove around the periphery of the inside of the pan, which gradually descends from a given point to the opposite or discharging point. My invention also relates to a distributor or distributers and stirrers, which are operated by the same power which moves th'ep'an, and through which the pulp passes into the pan, the heavier particles settling into the annular groove, displacing the lighter particles of sand by their gravity and the centrifugal force, current of water and the sand anddebris tend toward the central discharge-opening, through which they pass out, and at the same time the stirrers agitate the surface of the pan, and prevent the packing of the material which is being treated. My invention also relates to a self-discharging apparatus, and the peculiar construction of the crank-pin attachment, which accommodates itself to the circular line of the oscillations of the pan.

To more fully illustrate and describe my invention, reference is had to the accompanying drawings and letters marked thereon, forming a part of this specification, of which- Figure l is a side sectional elevation. 2 is a plan.

A A is the frame, which may be made of cast-iron or' other material, and is triangular in form, with projecting ends B B, in which the horizontal shaft Chas its bearings. On this shaft are placed ordinary loosepulleys D D; also, E E. F F are supports, A back of the bearings, the vertical shaft G at Fig.

at each end iiy-wh eels bolted to the frame for the'upper end of the point F, which;

driving and has its step in the frame beneath at the point A. The braces or supports F F, in some cases, may be dispensed with; and the vertical shaft can be made stationary, and the frame and the pan be made to turn on the shaft by forming the hub longer, and making theupper end solid for supporting the pan on the shaft. The construction and dispositionof the frame and braces or supports relative to' a pan of this description are such that much strength is obtained with less amount of material, making the machine more easily transportable to remote regions; also, the frame, and supports are out of the way of the movements of the pan and operator. Prior to my invention the devices for imparting the oscillating movement to the pans have commonly been a revolving shaft having a cam at each end, which cam is connected directly with the pan at its opposite sides, or else a similar'revolving shaft having cranks at each end, that connected with the pan at its opposite side by means of two pitmen or connecting-rods. The cams and the cranks were placed on opposite sides of the revolving shaft, so that the crank or cam on one end of a shaft furnished a motion in one direction, while the crank or cam on the other end of the same shaft furnished a motion in the opposite direction. As the cranks or cams on the opposite ends of the revolving shaft connected with the pan at its opposite sides, it followed that one side of the pan moved in one direction, while the oscillation required. In these cases it became impracticable to construct a concentrating-pan with a fixed center, as any variation in the length of the opposite cranks or pitmen, or in the eccentricity of the opposite cams, would give to some a reciprocating motion to the center of the pan. As in practice these variations would occur by wear, and were even difficult to avoid in the original construction of the machines on account of the extreme nicety required in making and adjusting cranks and pitmen to exact lengths, and making each one of the different cams to furnish exa ly the same amount of motion as the other, the centering shaft or step upon which the pan oscillated was left loose, so as to allow, to

the opposite side moved in the opposite direction, and thus produced some extent, of a reciprocating motion for the which had to be removed when it was, neccenter of the pan. j essary to clean out the pans. I call them By these arrangements it was impracticable open distributers. The center of the hopper to keep the pan at all times in the exactlyis a sleeve, 8, and is stationary, or turns on level position required to obtain from it the the shaft, and has an oil-cavity, J, in the end best results, and it was verydifficult to keep for lubricating the sleeve and shaft. L is a y the machines in order. descending channel or annular groove around In my arrangement the pan is fitted immovthe periphery of the pan, gradually declining ably upon, and is carried by, the vertical shaft from a certain point to an opposite or discharg and the shaft G descends into the step being point. At this pointis an opening through neath. The shaft G oscillates in the step, but the bottom of the pan for discharging the is fitted into it so closely that it has no room amalgam and quicksilver that may be present. to reciprocate or move sidewise in any direc- A plug closes this opening, except when it is tion. The connection of the shaft G with the desired to draw off the amalgam or quicksiloverreaching braces F at the point F assists ver. Above this opening other openings are in holding it firmly in a single position. made through the side of the pan, and a gate In one instance a single cam was tried, the or valve, M, serves to open and close the same pan being held to its place by a lengthened at pleasure. M is made flat, with an opening through it, and is turned by means of its handle. One or more holes are made through the side of the pan, each of Which holes will come immediately in front of the opening through the gate or valve M when the gate or valve is revolved to the necessary position. By partially revolving this gate or valve the openings through the side of the pan are closed and opened at pleasure, and the height at which the heavy material will be discharged from the pan can be regulated by having the openings through the side of. the pan made at different elevations, and in a circle, so that the opening in the gate or valve M, as it is re- In that case the weight of the pan was supported by rods from above.

By adopting the combination ofa single cam or crank and pitmen with the pan that is cardesigned; besides, it enables me to drive two pans thus mounted from a single shaft, and with one set of pulleys.

elow the hopper is a circular plate, I, to which are attached radial arms I I, and from which depend rake-like teeth or pins 0, a a. a, and thus form a continuous opening through which act as agitators or stirrers to prevent both the side of the pan and thegate M. the sand from packing near the center of the The gate M can be fastened to the side of the pan by any of the ordinary devices which will permit it to revolve.

The connecting-rod N is so disposed that it accommodates itself particularly to the circuthe pan or on the shaft for lubricating the to oscillate, and is provided with a ball-crank pin, N, at one end, and a wrist-ball pin at the other. The Wrist-pin is secured to the pan through a lug, and the attachment made to the crank-shaft at the opposite end.

The pan 0 should be placed on alevel with the central discharge, and unless it is so placed it is out of the question to expect it to do its ta-ilings pass and flow down the arm 01 pipe K into a T-shaped distributor, K K, pierced at the bottom with holes I) b b, and also having at the top slots b, which slots are for the purpose of cleaning and removing obstructions and giving notice of the stoppage of the discharge through the perforations to the operator by overflowing. The cross-pipe forming the outer end of the distributer is made to conform to the curve of T the pan, and one or more distributers may be employed in one pan. They can be made stationary or movable.

hen movable it may be revolved by having the top of the rim of the pan notched into a saw-like edge, 0 c c, in which two pawls, d d, attached to the end of the distributer, traverse, and by means of these each oscillation sends the distributer one notch forward in its circuit, and the momentum acquired assists in making the motion continuous. These distributors take the place of the sheet-iron distributing-covers heretofore used, which covered nearly the whole pan, and hid its Working operation and contents from view, and

pan, and, unless discharged, Will there remain until other grains of greater specific gravity take their place. Oonsequenty, for a short space of time after starting themachine the opened and their discharging commenced, which may be continuous or not, according to the richness of the sulphuret in the pulp or from a certain point to an opposite or distailings. charging point, substantially as and for the The concentrator can be set in pairs, for purpose set forth. which a single crank-shaft will suffice. 2. The concentrating-pan O, constructed The following are the movements which with a curvilinear surface, and provided with take place in my machine: The gate being the discharge valve or. gate M, turned by closed, the pan is started by the belt-connecmeans of a handle, whereby it is caused to tion or otherwise, and the feed of pulp or open or close either of the several dischargetailings commences. Iarticles of all kinds holes in the side of the pan, substantially as rush to the periphery of the pan. The lighter and for the purpose set forth. are gradually displaced by the heavier parti- 3. The open distribnte'r K K K, pierced cles, of which latter the larger keep at the top. at the bottom with the holes I) b b, and hav- This is continued until a certain depth of the ing at the top the slotsb b, substantially as fine heavy particles has accumulated. The and for the purpose specified. discharge-gate is then opened to the proper 4.. In combination with the distributer proextent, and a continuous flow of this tine vided withapawl, the pan 0, having anotched heavy matter is the result. As the larger parrim, forming a ratchet, substantially as and ticles of the heavier m" tter accumulate they for the purpose set forth. will, after a time, outnumber the smaller, and 5. The triangular frame A A, provided with will begin to find their .way out with them, the projecting ends B, in combination with an while the larger light particles will begin to oscillating pan, substantially as and for the crowd each other out at the center with the purpose described. finer portion of the waste, making my machine 6. The overreaching supports or braces F act in the capacity of a sizing apparatus, as F, connecting at the point F, and in which well as a concentrator, without the application the upper end of the vertical shaft turns, in of sieves or other devices to accomplish that combination with the frameAA, with the prodesired object, which, at best, are slow and jecting ends B B, and an oscillating pan, subimperfect in their operations. stantially as described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The pan 0, having a convex or curvilin- Witnesses: ear surface, and provided with the annular JNO. L. BOONE, groove L around the periphery, declining O. M. RICHARDSON.

In witness whereof I have hereunto set my hand and seal.

JOSHUA HEITDY. [L. 8.]

Images