US253229A

US253229A - Teeeitoey

Info

Publication number: US253229A
Authority: US
Publication date: 1882-02-07
Anticipated expiration: 1899-02-07

Description

(No Model.)

J. F. SANDERS. GONGENTRATOR OR ORB SEPARATING APPARATUS. f

Patented Feb. 7,1882.

Vlfllzesses N. PETERS, Fhulljlhognpher, Washingon. DA C.

NTTED STATES PATENT Orifice..

JOHN F. SANDERS, OF OGDEN, UTAH TERRITORY.

CONCENTRATOR FOR ORE-SEPARATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 253,229, dated February 7,1882.

Application filed June 28, 1881. (No model.)

To all whom it 'may concern:

Be it known that I, JOHN F. SANDERS, of Ogden, in the county of leber and Territory of Utah, have invented an Improved Concentlator for Ore-SeparatingApparatus,of which the following is a specitieation.

This invention relates to the combination of' a vibrating or otherwise agitated concentrator, which is divided into compartments by transversely-placed ribs, with sieves placed over said compartments, which sieves permit the fine particles ot gold and other metals to pass through them into said compartments and protect them against the currents of water and against the downward pressure ot' the coarser sands, &c. The ribs which divide the concentrator into compartments extend also above the sieves.

In the accompanying drawings, Figure l lrepresents an end view of my improved concentr.ttor, showing it as suspended in suitable machinery for operating'. Fig. 2 is a vertical longitudinal section ofthe concentrator.

The letter A represents the concentrator, which is a shallow pan, of proper length and width, suspended by rods a, or otherwise, from the supporting frame-work, and agitated by suitable eccentrics, (marked b,)which are shown by dotted lines in Fig. 1. This concentrator is placed under a suitable supply-hopper, B, indicated in Figs. l and 2 by dotted lines, so as to receive at one end the supply of mixed sand and gold or sand and amalgam which it is de' partments may be of varying degrees of coarseness, so that the sieve receiving the rst charge maybe the finest, the next coarser in mesh, and soon. Itwillbereadilyperceivedthatthesieves allow the ner particles ofgold and thelike that are to be saved to drop into the compartment upon the bottom l below, whereas the coarser particles will remain on the sieve and by the shaking action of the concentrator be caused to pass overthe separate ledge to the next sieve, excepting the coarse particles whose gravity will retain them on the first sieve. Thus I save in each compartment below the sieve the iinest particles of gold or other material to be separated and on the sieve the coarser particles ofthe heaviest material contained in the gravel. The bottom l has an opening to each compartment, closed by a gate. Were it not for these sieves the currents of water which are usually'employed on such concentrators to assist in moving gravel would be apt to carry the iinest particles of gold oft", and, again, the tinest particles would be very apt, it' it were not for the sieves, to be moved to the wrong place under the weight ot' the heavier gravel that rests on top. By means of the sieves the ne particles are protected against the superincumbent gravel, and also against being swept away by the current ot' water.

I do not here claim the concentrator provided with transverse ribs, nor one with a sieve-bottom alone; but

Vhat I do claim isln a concentrator, A, having transverse ribs d d, which divide it into compartments, the

sieves t' fi, placed above the receiving-bottom ZA ofthe concentrator and below the upper edges of the ribs, substantially as and for the purpose described.

JOHN F. SANDERS.

Witnesses:

ABBoT R. HnYwooD, M. BUoHMrLLnR..