US443836A - Ore-concentrator - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

J. H. MILLER. ORE GONGENTRATOR.

Patented Dec. 30,1890.

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J. H. MILLER. ORB GONGENTRATOR.

No. 443,836. Patented Dec. 30, 1890.

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UNITED STATES PATENT OFFICE.

JOHN H. MILLER, OF SAN J OSE, CALIFORNIA.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 443,836, dated December 30, 1890. Application filed December 16, 1889. Renewed October 13,1890. Serial No. 368,006. (No model.)

To all whom it may concern.-

zen of the United States, residing in the city of San J os, county of Santa Clara, and State of California, have invented certain new and useful Improvements in Ore-Concentrators, of which the following is a specification.

These improvements in ore-concentrators relate to machines of that class in which the concentrating surface is an endless traveling apron having continuous movement over a bed of rollers and also a vibrating or shaking motion during progression; and the improvements include an'endless carrier of bars or slats placed under the apron and adapted to support and carry it over the rollers, a vibrating bed and spring-standards of novel construction, and a general combination of parts and mechanism producing an ore-concentrator of improved character.

The nature of these improvements and the manner in which 1 have produced, applied, and carried out the same will be fully understood from the following description and the accompanying drawings.

Figure 1 represents the machine in side elevation, the view being taken from the lefthand side, looking from the head of the machine. Fig. 2 is an elevation of the opposite side. Fig. 3 is a top View with a portion of the apron and endless carrier broken away at one end to show the parts beneath. Fig. 4: is a vertical cross-section on a smaller scale through the shaking bed, just in front of the middle set of spring-standards. Fig. 5 illustrates another construction of shaking mechanism as a substitute for the double-crank shaft.

A indicates the shaking bed, and B B the rollers upon which the concentrating-apron 0 travels. Between the apron and its carryingrollers is interposed an endless carrier formed of narrow bars or slats D, fixed to endless chain belts D Dfiand arranged to be carried and driven by sprocket-wheels E E at the head or upper end and the tail or lower end of the machine. I

The bed-rollers are mounted in boxes d d on the upright sides A of the bed, and their faces are set in the same plane; but in place of the large end rollers or drums, as they are generally called in these machines, there are tion is given to one of the shafts F by sprocket-wheels J J chain belt I, and the counter-shafting H 11 .11 and cone-pulleys K K that are seen in Figs. 2 and 3. This mechanism controls the progressive movement of the concentrating-apron and enables the speed to be regulated, as the character or condition of the material being worked may require, without interrupting the operation of the machine. Its cone-pulley K is on the principal shaft, and gives motion to a fellow pulley K by the connecting-belt L, which is set at different points to change the speed by a belt-shifter M and a hand-lever M The cone-pulley shaft H is connected by counter-shaft H and gearing with the shaft H carrying the pulley J while the principal shaft is driven from a motor-shaft by a belt and pulleys, of which the one on the principal shaft is seen at G*. A balance-wheel Y is fixed on this shaft.

The shaking bed is shaped like a trough or box, but with open ends, and its upright sides A are of suitable height to bring the bedrollers a suitable distance above the bottom for the apron and its endless carrier of slats to pass under clear or Without dragging on the bottom of the bed. For a long apron a roller P will be necessary under the lower side.

The vibrating or shaking motion of the apron is a complex motion, in being a combination of longitudinal and transverse movements, and the spring-standards R, that support the bed, are therefore of peculiar construction, in order to yield and have elastic qualities in two directions. These standards are formed of round steel rods with two bows orv loops R R near the foot or lower end, one of which is set at right angles to the other, but both in vertical planes. The ends of each rod are secured in sockets R B, one on the stationary frame and the other on the bed A, in which position the rod is so set that one loop R is in line with the longitudinal motion and the other loop with the transverse motion, the corresponding loops in the whole setof standards standing in the same direction. Standards of such construction will be found serviceable for a long time without breaking or losing their elasticity.

The rock-shaft U, with an arm U produces thelongitndinal motion of the bed, the eccentric S on the principal shaft gives the transverse motion, and the two acting together produce a complex vibratory motion that is a resultant of the two single motions. A connecting-rod V extends from the arm of the rock-shaft to the side of the bed, where it is attached by universal joint and the rock-shaft is moved from the principal shaft by a crank pitman IV, and the arm U on the shaft. The eccentric S moves a second rock-shaft S having arms T T, the eccentricrod S being connected by universal joint S to one arm of the rock-shaft, while the rods T T from the arms T extend under the bed to the opposite side, where they are attached by loose joints to straps on the side of the bed A.

By the construction represented in Fig. 5 the rock-shaft S with connected parts, can be dispensed with, and in such modification the bed is attached by the bars or links T at one side to points i on a stationary side rail Y extending along one side of the bed and fastened to the uprights X of the stationary frame. At these points the side rail has curved outsetting portions 1' with spaced holes to take the pivot-bolts of the links, and the two links thus attached by pivots, both to the bed and to the side rail, are set parallel with each other and are of equal length. By virtue of this connection it will be seen that as the rock-shaft U gives longitudinal motion to the bed the vibration in such direction is changed and so modified by the parallel links that the bed moves sidewise and the motion pat-takes of both characters.

The endless-carrier slats are narrow bars of wood with their top faces rounded to give a smooth curved surface in passing around the s1 n-ocket-wheels, and they are fixed at regular distances apart upon two endless chain bolts that travel on an d are driven by sprocketwheels. The slats set directly upon the bedrollers to carry the concentratingapron, and the rollers are cut away or reduced in diameter at the end portions 1) corresponding to the width and thickness of the carrier-chains to bring the bottoms of the slats against the rollers B. The concentrating-apron can be considerably reduced in weight and thickness, and a canvas apron can be used to advantage in place of the more expensive rubber apron. This endless carrier also increases the durability of the apron.

Raised edges of rubber can be applied to a canvas body in forming the apron for this concentrator.

Suitable water and pulp feeding devices are placed at the head of the machine, and a sluice for the tailings is also set under the tail of the concentrating surface; but these necessary parts are already in common use in conthe endless link belts on which the slats are secured, in combination with sprocket-wheels driving the belts and bed-rollers supporting said carrier, said bed rollers having the reduced ends for receiving the link belts, the sprocket-wheels and bed-rollers being mounted in a vibrating bed, substantially as herein described.

2. I11 combination with the endless apron of an ore-concentrator, an endless carrier composed of spaced slats having rounded top faces and fastened at theirouter ends to endless chain belts, the sprocket-wheels and bedrollers by which said carrier is supported and driven, said bed-rollers having the reduced ends for receiving the endless chain belts, the bed or trough mounted on springstandards, and means whereby a continuous progressive movement is given to said carrier and a vibratory movement is imparted to the bed or trough.

3. In combination with a vibrating bed mounted on spring-standards for carrying the endless apron or concentrating surface, mechanism whereby curvilinear vibratory motion is imparted to the bed, consisting of the rockshaft having an arm with a connecting-rod attached to the bed at one side for giving longitudinal vibration, and the transverse rods or links, which are pivoted at one end to the bed at one side and are attached at the other end to pivots outside the bed for giving curvilinear motion in a lateral direction, substantially as herein described.

4.. In combination with the vibrating bed, the main driving-shaft G, secondary shaft II, counter-shaft I1 geared into the secondary shaft and the apron-driving shaft II", the sprocket-wheels and belt I J J and the conepulleys K K and belt-shifter, arranged for operation as set forth.

5. A spring standard or leg for vibrating beds of ore-concentrators, formed of cylindrical rod or wire with loops or bows standin g substantially at right angles to each other, as herein described.

6. In combination with the vibrating bed of an ore-concentrator, spring legs or standards fixed in supports at the ends to a stationary base and to the bed, having double loops or bows standing in different planes at right angles to each other, as herein described.

In testimony that I claim the foregoing I have hereunto set my hand and seal.

JOHN H. MILLER.

lVitncsses:

CHAS. E. KELLY, EDW'ARD E. Osnonn.

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