US487074A

US487074A - Magnetic separator

Info

Publication number: US487074A
Authority: US
Publication date: 1892-11-29
Anticipated expiration: 1909-11-29

Description

2 SheetSQSheet 1 (No Model.)`

T. J. LOV'ETT. MAGNETIC SEPARATOR.

No. 487,074. Patented Nov.

(No M odel) Patented Nov. 29,1892

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UNITED STATES PATENT OFFICE.

THOMAS J. LOVETT, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE INTERNATIONAL ORE SEPARATING COMPANY, OF NEW J EBSEY.

IVIAGN ETIC SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 18.2074, dated November 29, 1892.

Application filed February 13, 1892. Serial No. 421,431. (No model.)

To a/ZZ whom t may concern:

Beit known that LTHOMAs JEFFERSON Lov- ETT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Magnetic Ore-Separators; and'I do hereby declare the following to be a full, clear, and exact .description of the invention, such as will enable others skilled in the o art to which it appertains to make and use the same.

My invention relates to that class of sepa-` rators in which a magnet or magnets attract the magnetic portionv of the ore passing :5 through the magnet-field to an endless belt,

by which the magnetic ore is carried in one direction, while the non-magnetic portion is allowed to pass away in the opposite direction. The special type of machine herein to be :o described belongs to the class in which the magnet or magnets rotate independently of the belt, so as to secure rapid reversal of po- 'larity at each point in said belt as it passes over the magnet. For reasons of simplicity z 5 and cheapness I prefer to use a two-pole magnet in these machines. Vhen a large machine is built with two-pole magnets, the magnet becomes unwieldly and costly. There is a considerable neutral space upon its circumgo ference, and the speed of revolution necessary to secure the desired number of reversals of polarity becomes too great. To avoid these difficulties, I employ a number of small magnets in place of the one large one. The mag- 3 5 nets are journaled in the frame and the belt passes around them. Each magnet rotates around its individual axis, and as-the stu passes along it is subjected to rapid reversals of the magnetic polarity.` 4o The preferred construction is illustrated in the accompanying two sheets of drawings,in which- Figure 1 is aside elevation of the working parts of the machine with the main frame in 45 section. Fig. 2 is a plan view of the working parts with the main frame, the main belt, and certain of the other parts removed. Fig. 3 is a diagram of the electrical connections.

Throughout the drawings the same refer- 5o ence-figure refers to the same part.

1 is the main frame.

2 is the crescentshaped frame in which the rotating magnetic wheels 3 are journaled, being mounted on the shafts 4, as shown.

5 5, &c.,are gears by Which motion is trans- 5 5 mitted from one of said shafts to another.

6 is a pulley on one of said shafts.

8 is a pulleyon the driving-shaft 25. The pelt67 transmits motion from pulley 8 to pul- 10 are idler-rollers mounted in the

crescent frame

2, and 23 is a drum on the shaft 25. The main belt 9 runs around this drum 23 and around the idler-rollers 10.

11 is a disk on one of the shafts 4, and has 65 the projections 12 on its face. The projections strike the end of the lever 13, keyed on the shaft 14, on which the shaking-table 15 is mounted.

16 is an inclined feed-chute into Which the 7o shaking-table 15 delivers the stui or ore to be separated. y

24 is a. pulley on the shaft 25 by which power may be transmitted to the machine.

On each of the shafts 4 are two collecting- 75,' rings 1 7 and 18, though but one such set is shown in Fig. 2. A set of brushes, as 19 and 20, bear on these, and through them current is sent to the coils of the magnetic wheels 3 3 3, one of which is shown in section in Fig. 3.

In the diagram Fig. 3 the source of electric current is indicated by the battery 26. Of course any source of current whatever may be used. The pairs of brushes 19 20, conveying current to each magnet, may be connected up in multiple arc, as shown in full lines, or iu series, as shown in dotted lines.

The mode of operation ofv my invention is easily understood from the foregoing description. Motion being given to the driving-shaft 9o 25, the belt 9 is caused to travel around and over the idlers 10 before the magnets 3. The ore dropping from the shaking-table l5 and dropping down the chute 16 comes within the magnetic field and the magnetite is drawn to the belt and upon the same. The constant rotation of the magnets 3 subjects the ore traveling along on the belt to a rapid succes sion of changes in the polarity of its magnetism and the particles turn over and over, freeroo ing themselves from the non-magnetic impurities, which go on doWn 1the chute into the tailings.

The machine may be operated With or without Water.

Various changes in details could be made Without departing from ,the principle of kthe invention. The direction of rotation of the` magnets might be changed. Different kinds of gearing and electric connections might be' substituted, &c.

Having therefore described my invention, What I claim as new, and desire to protect by Letters Patent, is-

1. In a magnetic ore-separator, the combination of aplurality ot' rotating magnets, each of which has its individual axis of revolution, the curved stationary frame in which said magnets .are yjournaled, an 4endless belt .which lpasses around said magnets and around said frame, and mechanism for :driving said belt and'magnets, substantially as described. y

2. Ina magnetic ore-separator, the vcombination of a plurality of rotating magnets, each of .which has :its individual axis of revolution,

-the curved stationary frame in which said magnets are journaled, an endless belt Which passes around said magnets and around said trama-and mechanism for driving said belt and magnets together With an inclined feedchute which is arranged tangentially to said belt at a point opposite to the rotating magnets, substantially as described.

3. 'In a magnetic ore-separator, the combination of a plurality of rotating magnets set in a curved stationary frame, connecting gearing which renders their rotation simultaneous,

the driving-shaft and gearing by which rnc-l tion is conveyed to said rotating magnets,'the; drum on said driving-shaft, and the endless belt which runs around said drum and around the rotating magnets, substantially as described. y

4. Ina magnetic ore-separator, the combi-f nationof a plurality of rotating magnets setl in a curved stationary'frame,connecting gearing which renders their rotation simultaneous, the driving-shaft and gearing by Which motion is conveyed to said rotating magnets, the drum on said driving-shaft, and the endlessbelt Whichruns around said drum and around `the rotating magnets, together With an inclined feed-chute which is arranged tangentially to said belt at a point opposite to the rotating magnets, substantially as described.

5. In a magnetic.ore-separator, the combi-` nation of a crescent frame, the rotating magnets journaled in said frame, idler-rollers arranged on the convex side of said crescentv frame, the endless belt which runs around said frame upon said idler-rollers, and the driving mechanism for said belt and magnets, substantially as described.

6. In a magnetic ore-separator, the combination of the crescent frame, .the rotating magnets journaled in said frame, idler-rollers arranged on the convex side of said crescent frame, theendless belt-Which runs around said frame upon said idler-rollers, and the driving `mechanism for said-belt and magnets,.together .With an inclined feed-chute whichis arranged -tangentially to said belt at a point opposite to the rotating magnets, substantially as described.

'7. In a magnetic ore-separator, the combination of a plurality of rotating magnets, each of `Whichjhasits individual axis of revolution, the frame yin which said magnets are journaled, anl endless belt which passes around said magnets, a shaking-table mounted on a shaft over said .magnets,a disk .with projec- -tions thereon ymounted on the-shaft of one of the magnets, .anarmf-rom the shaking-table shaft which engages with ysaid projections,

.and mechanism fordriving said belt andfmagnets, substantially as described.

8. 'In a magnetic ore-separator, the combination ofaplurality of magnets, the crescent frame in which said magnets are journaled, the idler-rollers,arranged on the'convex vside of said crescent frame, the driving-shaft arranged on the concaveside of the crescent frame at a proper distance from the magnets,

lthe drum on `said driving-shaft, gearing by vWhich motion isconveyed'from said drivingshaft to the rotating magnets, the vendless belt which runs around-said drum and over the rollers described, and the inclined feedchute arranged tan gentially to said belt at a point opposite said rotating magnets, substantially as described.

9. In amagnetic ore-separator, .the combination of a pluralityof rotating magnets, the crescent'f-ramein which said magnets are journaled, the idler-rollers arranged on the con- VVex side of said crescent frame, `the driving- THOMAS J. LOVETT.

Witnesses: Y

.WARREN W. FOSTER, A. P. SMITH.