US1044697A - Pan-motion belt-concentrator. - Google Patents

Description

K. SEN N.

PAN MOTION BELT CONGENTRATOR.

APPLICATION FILED FEB. 20, 1912.

3 SHEETS-SHEET 1.

Patented Nov. 19, 1912.

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I I I l T ifwhh K. SENN. PAN MOTION BELT GONCENTRATOR. APPLICATION FILED FEB. 20, 1912.

1,044,697. Patented Nov. 19, 1912.

3 SHEETS-SHEET 2.

Patented Nov. 19, 1912.

APPLICATION FILED FEB. 20, 1912.

3 SHEETS-SHEET 3.

KARL SENN, OF ALAMEDA, CALIFORNIA.

PAN-MGTION BELT-CONOENTRATOR.

Specification of Letters Patent.

Application filed February 20, 1912.

Patented Nov. 19, 912. Serial No. 678,856.

To aZZ 707mm it may concern:

Be it known that l, KARL SENN, a citizen of the United States, residing at Alameda. in the county of Alameda and State of California, have invented. new and useful Improvements in Pan-Motion Belt-Concentrators, of which the following is a speci- .iication.

This invention relates to concentrating apparatus, and particularly to a belt concentrator having a pan motion.

The object of the present invention is to design an apparatus for the concentration of minerals of various specific gravities, the apparatus including means whereby the concentrated ore may be advanced gradu ally; said means consisting of a flexible belt.

A further object of the invention is to provide means for imparting to said belt an advancing intermittent motion, the mechanism having for its function, the movement of the belt in such a manner as to preserve it, thus increasing its life and eiliciency.

Another object is to design an ore concentrating apparatus involving means for imparting to a concentrating belt a substantially circular motion, and for imparting simultaneously with the circular motion an advancing motion in one direction, thereby avoiding a direct reversal of travel of the belt per se.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figures 1 and 1 are plan views of the apparatus. Fig. 2 is a side View of the same.

It is desirable to provide a concentrator having a flexible endless belt acting as a carrier for the concentrated values of certain ores, and it is particularly desirable to evolve an apparatus for imparting to the belt an intermittent advancing movement in one direction without directly re versing the travel of the belt around its supporting drums. To that end I have devised a machine in which the belt 2 is supported upon upper and lower drums 3, over which the belt travels in one direction intermittently. The drums 3 are mounted on respective shafts 4s-5 which are supported in appropriate journals 6 on a frame 7.

The frame 7 is superposed above and connected to a bed or main frame 8; the super posed frame 7 being connected to the bed 8 by links 9 mounted upon transverse pivots 10 relative to the frames 7 8, and thus permitting the upper frame 7 to move longitudinally relative to the main or carrying frame, which will he hereinafter called the carrier 8. The carrier 8 is flexibly suspended for lateral or side shake motion by means of suitable links 11 which are pivoted 'at their upper ends to suitable trunnions l2 and connected by pivots 13 to the carrier 8; the trunnions 12 being arranged in forward and rearward pairs of stanchions or standards 14 of the apparatus.

From the foregoing it will be the carrier 8 is supported by which are connected to the lower ends of a plurality of substantially vertical links 1.1, the upper ends of which are attached to the trunnions 12 in the standards 14-; and that the belt carrying frame 7 is superposed above the carrier frame 8 by means of links 9, thus permitting the frame 'i" to move longitudinally, but imparting to it the side shake which may be given to the carrier 8.

Since the belt carrying frame 7 supports the shafts 4-? of the belt drums il, it Wlll be clear that the belt will be moved backwardly and forwardly uniformly with. the frame 7 and laterally with any side motion of the carrier 8. For the purpose of imparting to the carrier 8 and its super posed belt supporting frame 7 a lateral mo tion, there is mounted in standards 14; a main or drivin shaft 15, on the ends of which are mounted eccentrics 16, driving eccentric links 17, "he ends of which are connected at 18 to the carrier 8. A complete revolution of the shaft will cause the table or carrier 8 to be laterally shifted a distance substantially equal to the throw of the eccentrics 16, and this side motion of the carrier 8 will be imparted simultaneously to the frame 7 and its belt 2. Simultaneously with the side shake action of the carrier 8, an endwise motion is imparted to the belt supporting frame F, by means of a l crank or eccentric 20 secured to the driving seen that shaft 15 and being connected by a link 21 to a bell crank 22, one arm of which is connected, as at 28, to a link 24 pivoted at 25 on the beltsupporting frame 7. For one complete revolution of the shaft- 15 and its pivots 13 crank 20, the bell crank 22 will be actuated to advance and return the belt supporting frame 7 a given stroke, which will be determined by the throw of the crank 20 and the proportions of the arms of the bell crank 22.

I have found it desirable in demonstrating my invention to so position the eccentries 16, which give the side shake, and the crank 20, which gives the end movement, to the belt supporting frame 7, that when the eccentrics 16 are at their lowermost point of revolution below the shaft 15, which will cause the carrier 8 to assume a position midway between the total side shake, the crank will also be at a position in its cycle lowermost relative to the shaft 15, at which time the bell crank 22 will have been actuated and thrown the belt supporter 7 ahead the maximum throw.

The operation of action of the carrier 8 and the belt supporter 7 will, for a half revolution of the shaft 15, be as follows: ith the shaft moving in the direction indicated by the arrow A, Fig. 2, the table or carrier 25 8 will be shifted to the left to its maximum point of movement and back to the center of movement, at which time the crank 20 will actuate the bell crank 22 to draw the belt supporter 7 from its foremost to its rearmost position. The combination of the side shake given to the carrier 8 and the superposed belt supporter 7, with the return motion of the belt supporter 7 which is independent of the table 8, will produce a curve closely approximating a semicircle, which is indicated on Fig. 1 diagrammatically. The remaining half cycle of the shaft 15, which will carry the eccentrics 16 and the crank 20 from a high point to a low point, will cause the table or carrier 8 to be shifted from central to right hand position, and then brought back to center position, while the crank 20 will advance the belt supporter or frame 7 forwardly simultaneously completing a path approximately semicircular and coinciding with the path of travel of the first half cycle of the shaft 15; the movement of the belt supporter 7 for one complete cycle of the shaft 15 forming an outline substantially circular, as indicated in Fig. 1.

The mechanism hereinbefore described has for its function the production in the belt supporting frame 7 of a motion closely approximating a true circle, and while this motion of itself will facilitate the concentration of the components of the pulp which may be discharged on the surface of the belt 2, it will not effect an advance in one direction of the belt 2, which it is necessary to have in order to separate the values carried in the pulp from the tailings. For the pur pose of imparting an advancing movement to the uppermost stretch of the belt 2, means are provided whereby the shaft 4:, on which is intermittently moved in one direction, thus feeding or advancing the belt 2. This mechanism for advancing the belt comprises a crank or eccentric 26, which may be adjustably connected to the shaft 15; tie crank 26 operating a link 27 which is connected to the outer end of a lever arm 28 loosely mounted on the shaft l. T 1e lever arm 28 carries a suitable friction clutch device, as

a roller or pawl 29, which, when the arm is moved upwardly, is adapted to bind upon the internal surface of the drum 30 secured to the shaft 4t; hence, at each upward movement of the crank 26 and link 27, the lever 28 when lifted will force the friction device 29 into locking or binding engagement with the drum 39 effecting a turning motion of the latter with the shaft &.

Since the clutch device 29 is effective only during the upward movement of its arm 28, it will be manifest that when the crank 26, which operates the arm 28, swings downwardly, the clutch device 29 will be automatically released and slide freely within the drum 30 without effecting a reverse rotation of the drum and its shaft 4.

The upward swing of the crank 26 and the crank driven arm 28 is designed to occur at the time that the bell crank 22 driven by crank 20 is actuated to force or move the belt carrying supporter forwardly, so that if the belt supporting frame 7 is moved forwardlv, say 1-} inches, it will also carry the entire belt 2 simultaneously forward the same amount; at the same time the belt will be shifted by its drums a distance which will be determined by the throw of the crank 26 driving the clutch arm 28. The consequence is, that the belt, instead of moving in a true semicircular arc synchronously with the motion of the belt supporting frame 7, will have a gradual movement forward, due to the comb'ned action of the crank 20 and the belt advancing crank 26', the advance of the belt being clearly indicated at B, Fig. 1.

If it be desired to impart to the belt a reverse travel over the supporting frame 7, to clean the belt, then there may be provided a forwardly projecting arm 31 secured to the hub of the arm 28 and carrying a friction locking device 32, which will be operative to automatically clutch the drum 30 during the upward movement of the arm 31; this upward movement being imparted through the clutch device 32 to the drum 30 and its shaft i to reverse the motion of the belt 2 on the frame 7. The locking device 32 is omitted while the machine is in general use and the clutch device 29 is working. When the belt is to be cleaned, the device 29 is removed and the back feed device 32 inserted.

For the purpose of obtaining a prelimi- 65 is supported the forward or upper drum 3, nary concentration of the material treated in the machine, a feed hopper 35 is shown as connected substantially to the belt supporting table, so that the hopper structure is given semicircular or orbital movement simultaneously with the table, this movement very effectually concentrating the heavier components of the ore being handled.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. The combination in a concentrating apparatus of an endless belt, rotary drums for carrying the belt, a table on which the drums are mounted, a carrier to which said table is flexibly connected for endwise movement independently of the table, a longitudinal shaft having eccentrics adjacent the ends for imparting a lateral movement to the carrier, and means at one end of the shaft outside of the eccentrics at that end and a bell crank lever for reciprocating said table longitudinally simultaneousl with the lateral movement of the carrier.

2. The combination in a concentrating apparatus, of an endless belt, rotary drumsfor carrying the belt, a table on which the drums are mounted, a carrier to which said table is flexibly connected for endwise movement independently of the table, a longitudinal shaft and devices thereon for imparting a lateral movement to the carrier, including an eccentric on the end of the shaft and a bell-crank lever on the carrier connected to said eccentric for reciprocating said table longitudinally simultaneously with the lateral movement of the carrier, and means for shifting said belt and operative upon said drums during the forward reciprocation of the table.

3. The combination in a concentrating apparatus of an endless belt, rotary drums for l carrying the belt, a table 0 n which the drums are mounted, a carrier to which said table is flexibly connected for endwise movement shaft and devices thereon for imparting a lateral movement to the carrier, means for reciprocating said table longitudinally simultaneously with the lateral movement of the carrier, and a clutch mechanism including a clutch member,

shaft and. a rod universa member, said clutch eccentric and clutch an eccentric on the lly jointed to the member being operative to rotate the drums in one direction to shift the belt independently of the table.

4. The combination in a paratus, of an endless drums by which the advanced, means belt belt,

concentrating apa table carrying is supported and for reciprocating the table longitudinally with the drums, a carrier, links connecting said table and the carrier whereby the table is permitted to reciprocate longitudinally independently of the carrier, a driving shaft, connections at opposite ends of the shaft between said shaft and said carrier for imparting to the carrier and its superposed table and the belt a ment, a clutch at the head end lateral moveof the table,

a crank on the end of said shaft and a link universally ointed thereto and operating the clutch for revolving the drums to advance the belt simultaneously wi ciprocation of the belt In testimony whereof I th. the forward recarrying table.

have hereunto set my hand in the presence of two subscribing witnesses.

lVitnesses CHARLES EDELMAN, C. J. SWENsON.

Washington, I). G. M

KARL SEN N.

g the Commissioner of Patents,

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