Untitled record

Application filed February 18, 1903. Serial No. 143,967. (No model.)

To all whom, it may concern:

Be it known that I, Ludwig Fredrick SChoenefeldt,a citizen of the United States, and a resident of Denver, in the county of Denver and State of Colorado, have invented a new and Improved Concentrator, of which the following is a full, clear, and exact description.

This invention relates to improvements in concentrators or machines for separating the values from dry crushed ores, dry gravel, and dry sand, an object being to provide a concentrator operating by centrifugal action that shall be light, strong, and durable, easily operated, and that while taking up a very little space will provide for a large output.

Further objects of the invention will appear in the general description.

I will describe a concentrator embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of a concentrator embodying my invention. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is a sectional elevation of one of the separating-eups employed, and Fig. 4 is a sectional view showing a modification of the cup-rotating mechanism.

Referring to the drawings, 5 designates a standard or base from which a fixed shaft 6 extends upward. A driving-shaft 7, operated from any desired source of power, has a bearing in the standard 5, and on this shaft is a bevel-gear 8, meshing with a bevel-gear 9, rotating on the shaft 6 and on the upper end of the standard 5. Attached to this bevelgear 9 is a table 10, carrying a series of gearwheels 11. As here shown, four of these gear-wheels are mounted to rotate on the upper side of the table, and the several gearwheels 11 mesh with a gear 12, fixed to the shaft 6 above the table. Also supported from the table by standards 12^aand having a bearing on the shaft 6 is a hopper 13, which preferably has a conical bottom 14 for directing material to the tubes 15, which convey said material to the cups 16. Each cup is substantially hemispherical and has an outlettube 17 extended from its lower portion. These outlet-tubes also form the axes of the cups, as the several tubes have bearings in 55 rings 18 and 19, surrounding the table 10 and supported therefrom by means of arms 20. At the inner end of each tube is a sieve material 21, which will permit the outlet of the heavy values. 6_OOn the tube 17 of each cup between the rings 18 and 19 is a band-wheel 22, and on the spindles of the gears 11 are pulleys 23, from which bands 24 extend to the pulleys 22.. It may be here stated that while there 65 are four gear-wheels 11, and consequently four pulleys 23, there will be a very much greater number of cups 16. I have here shown twenty-fourof thesecups, and thecups are arranged in sets of six, the six cups of 70 the set being operated from a pulley 23. Each pulley 23 is provided with three annular channels, and from each channel a band 24 passes around the pulleys 22 of two adjacent cups, as clearly illustrated in Fig. 2. 75

In the example of my improvement shown in Fig. 4 a table 25 is arranged to rotate with a gear 26, and carried by this table are spindles 27, on which are bevel-gears 28 and also band-pulleys 29. The gears 28 are 80 engaged by bevel-pinions 30 on the outer ends of shafts 31, carried on the table, and the inner ends of the shafts are provided with bevel-pinions 32, engaging with a fixed bevel gear or rack 33. In this construction 85 the bands will pass from the pulleys 29 to the pulleys connected to the cups, and obviously as the table 25 is rotated the several pulleys 29 will also be rotated on their axes, imparting rotary motion to the cup. 90

In the operation the crushed ore, sand, or gravel containing gold or other values and while in a dry state will be placed in the hopper 13. While the machine is in motion, the material will pass through the tubes 15 into 95 the cups 16, and as these cups are rotated on their axes the heavy matter or values will be thrown outward against the inner sides of the cups by centrifugal action and the ores, owing to the particular shape of the cups, 100 will gravitate to the screens 21 and pass out through the tubes 17 and be collected in a

749,104 suitable receiver arranged underneath the tubes. The tailings or like material will be discharged over the tops of the cups.