US1061105A - Concentrator. - Google Patents

Description

H. J. NIELSEN, G. J. BORGLIN & L. G. A. SOBBORG.

GONGENTRATOR.

APPLICATION FILED NOV. 25, 1911. 1,061,105. Patented May 6, 1913.

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H. J. NIELSEN, G. J. BORGLIN & L. G. A. SOEBORG.

GONGENTRATOR.

APPLICATION FILED NOV. 25, 1911. 1,061,105. Patented May 6,1913.

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H. J. NIELSEN, G. J. BORGLIN & L. G. A. SOEBORG.

GONGBNTRATOR.

APPLICATION FILED NOV. 25, 1911. 1,061,105. Patented May 6, 1913.

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H. J. NIELSEN, G. J. BORGLIN & L. G. A. SOEBORG.

GONGENTRATOR.

APPLICATION FILED NOV.25,1911.

Patented May 6, 1913.

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GONGENTRATOR. APPLICATION FILED NOV. 25, 1911.

1,061, 105. Patented May 6, 1913.

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SM/UW/tOz/S HOL GER J N/EL SEN ewmmw CHARZ. 5 J 50/? 61 [N 851g LUaV/e Q/LSOEBO/i ?%MM' WW7 UNITED STATES PATENT OFFICE.

HOLGER J. NIELSEN AND CHARLES J. BORGLIN, OF SAN FRANCISCO, AND LUDVIG'r C. A. SOEBORG, 0F ALAMEDA, CALIFORNIA, ASSIGNORS T0 BEAR MILLING AND MINING COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA..'

CONCENTRATOR.

Specification of Letters Patent.

Application filed November 25, 1911.

Patented May 6, 1913.

Serial No. 662,296.

To all whom it may concern:

. Be it known that we, HOLGER J. NmLsEN, a subject of the King of Great Britain, and CHARLES J. BORGLIN and LUDVIG C. A. Sonnono, citizens of the United States, the two former residing at San Francisco, San Francisco county, and the latter residing at Alameda, in the county of Alameda, all of the State of California, have invented certain new and useful Improvements in Concentrators, of which the following is a specification.

Our present invention relates to ore concentrating machines and more particularly to that class of apparatus for effecting concentration of ore by the dry process, and is particularly applicable as means for the separating of gold and platinum from matter such as sand and earth, with which it is usually found intermixed, in certain localities.

The principal objects of our invention, are, to provide a concentrator of the character described in which particles of lighter specific gravity are separated from those of higher specific gravity by means of agitation through properly directed air blasts and reciprocation of settling members, and further to somewhat grade the particles of higher specific gravity as they are passed from the apparatus.

A further object of our invent-ion is to provide an apparatus adapted to be located in close proximity to the place where the ore bearing material is found and to enable it to be transported to the concentrator, within a practical radius,.without moving the concentrator and thus facilitating operation as the workings of the find progress.

In the drawings, forming a part of this specification :Figure 1 is a side elevation of a concentrator and conveyor embodying my invention, parts of the conveyer being broken away to facilitate illustration. Fig. 2 is a View similar to Fig. 1 showing the opposite side of the concentrator therefrom. Fig. 3 is a rear end elevation of the concentrator. Fig. t is a cross sectional view on the lines et4t of Fig. 1. Fig. 5 is a horizontal sectional View of substantially the lines 5--5 of Fig. 1. Fig. 6 is a horizontal sectional view on substantially the lines 66 of Fig. 1. Figs. 7 and 8 are detail views showing means for permitting relative movement between a member, and a member supported thereby. Fig. 9 is a central vertical longitudinal sectional view through the concentrator. Figs. 10 and 11 are detail views of a portion of ascreen used in connection with the concentrator and means for strengthening the same. Figs. 12 and 13 are detail views of a portion of means for adjusting the tension of the before mentioned screen. Fig. 14 is a transverse vertical sectional view on substantially the lines 1414 of Fig. 1.

Similar characters refer to similar parts throughout the several views.

A suitable frame structure is provided which consists of base members 1, uprights 2, and crossties 3, it being obvious that the general construction of the frame structure may be modified, as circumstances may require, without departing from the spirit of our in vention.

Carried by the frame and stationary therewith are suitably apertured side plates 4 which may be joined at the bottom and side margins by a plate 5, clearly shown in Fig. 9 of the drawings. The plates 4 and 5 form a suitable casing for supporting and containing suitable air current producing means to be subsequently described. The plates 1 carry complementary supports 6, which may be of angle section, such supports being movable with respect to the plates through the resilient connections 7, which may consist of a bracket 8, carried by the plates 4:, a bracket 9, secured to the supports 6, and a compression spring 10 interposed therebetwcen.

The supports 6 are designed to carry and agitate laterally, a longitudinally movable screen 11 clearly shown in section in Fig. 9 of the drawings. To provide means for supporting the screen, a suitable curved arm 12 is pivoted to each end of the supports 6, thus providing two pairs of complementary arms 12, which carry'shafts 13 and flanged wheels 14 which latter support the screen 11 at its lateral margins. The screen is further supported intermediate the arms 12 by a roller 15. With particular reference to Figs. 10 and 11, it is to be noticed that the screen 11 may be provided with a strengthening strip 16 at its lateral margins where it is supported by the wheels 14, and that transverse bars 17 are provided to prevent the screen from sagging in the center.

The complementary arms 12 are supported at their ends opposite their pivotal connection to supports 6, by means providing play between parts, and illustrated in detail in Figs. 7 and 8 of the drawings. Carried by the plates l are brackets 18, supporting rods 19, connected by a yoke 20, the latter including lugs 21 supporting pivot members 22, all of which remain stationary with the plates 4:. The ends of the complementary arms 12 are connected by a rod 23, provided with a slidable collar 24: and having a bearing 25 which coacts with the before mentioned pivot members 22 with longitudinal play thereon. It will thus be seen that the arms are permitted to move laterally and also supported to swing, to a limited extent, about their pivotal connection with support 6. The latter provision disclosed is for the purpose of allowing adjustment or tensioning of the screen 11 and with this object in view, we pivotally connect the ends of the opposite arm 12, adjacent the rod 23, by means of rods 26 and turnbuckle structure 27, similar structures being disposed on both sides of the machine. The turnbuckle structure 27 is shown in detail in Figs. 12 and 13, and includes sleeve portions 28, internally threaded in opposite directions, which receive the complementary threaded portions of rod 26, and a worm wheel 29 which may be formed integral therewith. Clevis supporting members 30 retain a worm 31 in coaction with the worm wheel 29, and the worms of both turnbuckle structures are connected by a common shaft 32 which may be provided with a crank 33 for operating the same. Thus, upon rotating the turnbuckle structures to feed the rods 26 outwardly, or in opposite directions, the complementary pairs of arms 12 are swung away from each other thus tensioning the screen 11.

The screen. 11 is continuously moved, during operation of the device, in the direction indicated by an arrow in Fig. 9, by means of motion transmitted successively, from the motive power device 3%, to main drive shaft 35, shafts 36 and 37, preferably through belt transmission, shaft 37 carrying a sprocket 38 which drives a chain 39 imparting movement to similar sprockets 38 secured to the shafts 13 and roller 15.

The support 6, and all parts carried thereby, have imparted thereto, during operation, a lateral to and fro movement by mechanism clearly shown in Figs. 1 and l of the drawings, which consists of a shaft 40, driven by a quarter turn belt 41', from main drive shaft 35, eccentrics 41. mounted on this shaft, and eccentric straps operatively connected to the support 6 by means of pivoted rods 13.

Carried by the support 6, and superjacent to the screen 11. is a lid 44 for the casing formed by the plates 41 and 5. With particular reference to Fig. 9, this lid forms a chamber 45 above an inclined portion of the screen 11 and is provided with an ingress opening 46 for the material to be concentrated. The chamber 15 terminates at its upper end in a retroverted head 47 having an egress opening 48, so curved as to cause a current of air passing through the chamber, to be agitated before leaving the same. Any air current generated through the chamber #15 is directed toward the head 48 by a plate 49 terminating at its lower end substantially tangent to the screen 11,. The lid 14 further provides a chamber 50 above the descending portion of screen 11 and one wall 51, thereof serves as the base of a trough 52, the purpose of which is to be subsequently disclosed.

The plates 4. are adapted to support a plurality of air current generators, which will be described successively with respect to their action upon the material fed into the chamber 45 through the opening -16. As previously stated, the screen 11 moves in the direction of the arrow shown in Fig. 9. Disposed below said screen and the chamber 45, is an air current generator which is provided with a conduit 54 to direct the air current produced, through the screen 11 and toward the head 47. This generator 53 may consist of fans which draw in air from the exterior of the apparatus, and plates 56, which may connect the inner margins of the fan blades to force the air through conduit 54:. The action of this initial air current is to separate the lighter particles from the heavier particles, the former being blown upwardly toward the head 47 where they are finally agitated before leaving the apparatus through the opening 48, and are conducted away by the trough 52. The heavier particles which cannot pass through the mesh of the screen 11 remain thereon and are carried forward with it in its movement.

Next adacent to the conduit 5-1 and under the screen 11 is a funnel-shaped cavity 57 into which material that passes through the mesh of the screen is received. This cavity opens at the smaller end of a frusta conical shell 58, the larger end being provided with an intake fan 59 and spiral. blades 60 carried stationary upon the interior all of the shell. By the coaction of the fan 56 and blades 60, the indrawn air current is given a whirling motion and encounters the material fiowing out of the cavity 57, after which the egress means for the air and material widens into a chamber 61 in which is located a settling rittie plate 62. Owing to the enlarged chamber 61, the velocity of the current is reduced and the heavier particles settle upon the plate 62 while the lighter particles have egress, with the air current,

through opening 63. We prefer to continuously agitate the plate 62 for the purpose of freeing the concentrated ore thereon, from undesirable matter, and with this object in view, pivotally mount the plate at one end on rod 64: and operatively connect the other end to an eccentric mechanism 65, or its equivalent, which may receive motion through belt 66 and shaft 40, clearly shown in Fig. l of the drawings.

Such material as remains on the screen and passes the plate 49 is next acted upon by a substantially uniform current of an indrawn by fans 66 and deflected radially by ribs 67 into the chamber 50, and finding egress through the opening 68 thereof. The current carries 03 such material as is not of such specific gravity as to remain on the screen. Thus material which is not finally carried away by the air current generated by fans 66, is deposited in conduit 69 and conveyed to chamber 70 where a settling rittle plate 71 similar to that hereinbefore described, is located. The plate 71 is pivoted at one end, as at 72, and agitated by eccentric mechanism 73, or its equivalent, receiving movement through belts 74 from main drive shaft 35. Any suitable power transmitting means may be used to actuate the several fans, and as shown in the drawings, fan 66 receives its motion from main drive shaft 35 and motion transmitted to this fan is also transmitted to the other fans by belts, all clearly disclosed in the drawings.

To adapt the apparatus for operation in close proximity to the place where the material is mined, we surmount a circular supporting track 78 upon the uprights 2, such track supporting one end of a conveyer structure 79. The end connection between the conveyer structure and condenser is formed of a bearing block 80 for the sup port of a drum 81 and drive wheel 82 therefor, the bearing block being provided with wheels 83, facilitating movement of the same about the track, and stay wheels 84 retaining it in place with respect thereto. The conveying structure includes suitable framework 8% carrying guide wheels 85 for a conveyer belt 86 trained about the drum 81, at one end of the frame, and a similar adjustable drum 87 at the opposite end thereof.

It is obvious from the foregoing that the concentrator may be stat-ionarily located and the conveyer structure moved in circles thereabout and extending radially therefrom. This enables the conveyer to be bodily moved successively as the working progresses. In order to drive the conveyer by means generated at device 34, movement of the shaft 35 is transmitted by belt 88 to actuate a rope-driving system 89, suitably tensioned by weight 90 and trained to rotate a vertically arranged shaft 91 disposed concentric to the track 78. From the shaft 91 power is transmitted to drive wheel 82 by a rope-driving system 92 held properly tensioned by weight 93. It is obvious, however, that other means of power transmission may be substituted for the rope-transmitting system, without departing from the spirit of our invention.

A hopper 9a is carried by the frame structure and adapted to transport the material deposited thereon by the conveyer, to a shutter controlled hopper 95. The latter hopper is positioned to deliver to the opening 46 in a chamber 45, and is provided with a shutter 96, controlled by a crank 97, to allow a fine, even stream of material to enter the said chamber.

The operation of the device is as follows :The concentrator having been positioned for operation, the conveyer 79 is swung into convenient proximity to the active working, and the mechanism put into action. The screen is continuously agitated laterally and fed longitudinally over the several air current generators as hereinbefore described. The particles of lighter specific gravity find egress with the air currents while those of higher specific gravity settle upon the settling plate in a somewhat graded condition, that is, those passing through the mesh of the screen settle on plate 62, while those of a size to remain by gravity on the screen, settle on plate 71. In practice, we find it desirable to fill one or more of the plates with mercury.

We claim 1. An ore condenser comprising in combination, a screen movable longitudinally crosswise of a vertical plane, means forming a plurality of chambers, provided with out lets, above said screen and disposed successively with respect to the direction of movement thereof, the first of said chambers be ing provided with ingress means for the material to be treated, mechanism delivering air currents, separated one from another, upwardly through said screen and into said chambers, means disposed intermediate two of the said delivered air currents for receiving material passing through said screen, and means disposed in succeeding relation to said chambers with respect to the direction of travel of said screen for receiving the material remaining on the latter after having passed through the said chambers.

2. An ore condenser comprising in combination, a screen movable longitudinally crosswise of a vertical plane, a device for reciprocating said screen laterally, means forming a plurality of chambers, provided with outlets, above said screen and disposed successively with respect to the direction of movement thereof, the first of said chambers being provided with ingress means for the material to be treated, mechanism delivering air currents, separated one from another, upwardly through said screen and into said chambers, means disposed intermediate two of the said delivered air currents for receiving material passing through said screen, and means disposed in succeeding relation to said chambers with respect to the direction of travel of said screen for receiving the material remaining on the latter after having passed through said chambers.

3. An ore condenser comprising in combination, a screen movable longitudinally crosswise of a vertical plane, means forming a plurality of chambers, provided with outlets, above said screen and disposed successively with respect to the direction of movement thereof, the first of said chambers being provided with ingress means for the material to be treated, air current generating means delivering to said chambers, upwardly through said screen and separated one from another, a means for agitating the air current in the said first chamber adjacent the outletthereof, means disposed intermediate two of the said delivered air currents for receiving material passing through the screen, and means disposed in succeeding relation to said chambers with respect to the direction of travel of said screen for receiving the material remaining on the latter after having passed through said chambers.

at. In an ore condenser the combination, of a screen movable longitudinally crosswise of a vertical plane and having an ascending and descending path of movement, means forming two chambers one above the said ascending portion and one above the said descending portion of said screen, said chambers being provided with outlets adjacent their ends disposed farther-most with respect to the direction of movement of said screen the first of said chambers being provided with ingress means for the material to be treated, mechanism delivering air currents, separated one from another, upwardly through said screen and into said chambers and in advance of the openings therein, means disposed intermediate two of the said delivered air currents for conveying material passing through said screen, and means disposed in succeeding relation to said chambers with respect to the direction of travel of said screen for receiving the material remaining on the latter after having passed through said chambers.

5. In an ore condenser the combination, of a screen moving longitudinally crosswise of a vertical plane and having an ascending and descending path of movement, means forming chambers, provided with outlets, above the ascending and descending portions of said screen and disposed successively with respect to the direction of movement thereof, the first of said chambers being provided with ingress means for the material to be treated, mechanism delivering air currents, separated one from another, upwardly through said screen and into said chambers, means disposed in succeeding relation to one of the said delivered air currents and open to the chamber above the ascending portion of the screen for conveying material passing through the latter and means disposed in succeeding relation to the chamber over the ascending portion of said screen for receiving the material remaining upon the latter after having passed through said chamber.

6. In an ore condenser the combination, of a screen movable longitudinally crosswise of a vertical plane, means forming a plurality of chambers, provided with outlets, above said screen and disposed successively with respect to the direction thereof, the first of said chambers being provided with ingress means for the material to be treated, air current generating means delivering to the first of said chambers and directed to encounter the material fed thereinto, a conduit disposed beneath the said screen and open to the said first chamber, for the reception of material passing through said screen, a second air current generator directing its current of air into a succeeding chamber to said first mentioned chamber for carrying away the lighter particles of matter upon said screen, and means succeeding said last mentioned chamber for receiving the material upon said screen.

In testimony whereof we aflix our signatures in presence of two witnesses.

HOLGER J. NIELSEN. CHARLES J. BORGLIN. LUDVIG C. A. SOEBORG.

W'itnesses F. P. ScHRoEDnR, H. C. Sormonnnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner or Patentt. Washington, I). C.

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