US703329A - Magnetic separator. - Google Patents

Description

lo. 703,329. Patented lune 24, 4902.

J. C. WINDER.

`MAGNETIC SEPABATUR.

'(Applicaeion med um. 25, 1902.)

l0 Model.) Y

Affergays UNr'TED" STATES 4Iefrnrrr OFFICE.

JAMES G VINDER, OF EASTPOINT, GEORGIA, ASSIGNOR OF ONE-HALF TO DANIEL C. LYLE, OF EA`STPOINT, GEORGIA.

MAGNETIC SEPARATOR.

SPECIFICATION foanilnig part of Letters Patent No. 703,329, dated June 24, 1902.

Application filed March 25,1902. Serial No. 99,914. (No moriehl To all whom it may cmwm: are formed two alining slots 7 and 8, sepa- Be it known that I, JAMES O. VINDER, a rated by the material forming the board, said citizen of the United States, residing at Eastslots being adapted for the reception of a sepoint, in the county of Fulton and State of ries of soft-iron plates forming the pole-pieces 55 Georgia, have invented a new and useful of a number of small electromagnets. The Magnetic Separator, of which the following plates in the grooves 7 represent the neg-` is a specification. i ative or north-seeking poles of the magnets, My invention relates to certain improvewhile the plates llin the grooves 8 represent ments in magnetic separating devices of that the positive or south-seeking poles, the space 6o 1o class employed in connection with cotton-gills between the two sets of plates being quite and similar machinery for the purpose of arsmall, so that anymetallic fragment-such as resting all foreign metallic substances-such a piece of wire, nail, or tool-passing over the as nails, bolts, or scraps of metal-and preboard will form an armature between two venting their passage into the machine along sets of plates. The slots extend transversely 65 with material to be treated. of the natural flow of material across the The principal object of the invention is to board, and the adjacent ends of the plates in provide an improved device of this character each slot are arranged at such an angle to the in which both the cost of construction and exlinel of travel of the material passing over the pense of operation maybe materially reduced feed-board that there will be no dead space, 7o zo and in which the entire width of the feedsuch as would occur if the plates were sepaboard or similar device of a cotton-gin, linrated on lines at a right angle to their length, ter, or huller may be protected by a comparaany metallic particle, however small, being tively weak electrical current and which may subjected to the action of the magnetized be applied to any of the usual forms of feedplates in passing over the board. In order not 75 2 5 boards at but slight expense. to interfere with the free passage of the ma- With these and other objects in view the terial to be treated, the surfaces of the plates invention consists in the novel construction or pole-pieces are iiushwith the surface of and arrangement of parts hereinafter dethe board and do not obstruct the flow of mascribed,illustratedin the accompanyingdrawterial in any way. In the board are formed 8o 3o ings, and particularly pointed out in the apa series of openings l2 of a number equal to pended claim. .the numberof magnets employed,and through In the drawings, Figure 1 is a perspective vthese openings extend metallic plates 13, view of the upper or inner face of the feedwhich are mechanically and electrically conboard of a cotton-gin or delinter, showing the nected to the plates 10 and l1. The side 85 application thereto of a plurality of magnetic plates are mechanically and electrically conbars arranged in pairs and forming the polenected to metallic cores 15, a core being empieces of a corresponding number of electroployed for each set of plates or pole-pieces magnets. Fig. 2 is a similar-view of the rear l0 and 11. The core, as usual, may be covor lower face of the feed-board, illustrating ered by insulating material, and on said core 9o 4o the arrangement of the electromagnets and is wound an insulated metallic Wire 16, the their connections. Fig. 3 is a transverse secvarious coils being connected in series to tional elevation through one of the magnets wires 17 and 1S, having binding-posts 19 at and the feed-board on the line 3 3 of Fig. 1. ene end of the feed-board for connection to Similar numerals of reference are employed a storage battery or other source of` electrical 95 to indicate corresponding parts throughout energy.

the several gures of the drawings. In devices of this class as hitherto con- Referring to the drawings,5represents the structed it has been usual to employ two inclined feed-board of a cotton-gin, delinter, magnetic plates or pole-pieces extending conor machine of similar character and having tinuously from end to end of the board, in loo 5o hinges G for connecting it to the casing of combination with a core and coil of substanthe machine. In the upper face of the board tially the same length as the board, this be gli ing considered essential in order that the attractive force of the pole-pieces may be equal throughout their entire length. A construction of this kind not only renders necessary the construction of a special form of feedboard, but entails considerable expense in the construction of the enormous magnet employed, the feed-board and the magnet being several feet in length. Owing to the resistance of a magnet of this size, it becomes necessary to employ a dynamo or generator to energize it, it being impossible from a practical standpoint to employ a storage or other battery for the purpose. This feature is objectionable, owing not only to the constant expense of operation, but to the fact that when the mill shuts down from any reason the metallic particles which have accumulated at the magnetic poles are instantly released and pass into the machine in a body, the accumulated lnetallic matter being much more injurious than if a number of separate pieces were allowed to pass at intervals into the machine. In carrying out my invention I am enabled to attain the desired result by a comparatively Weak electrical current, owing to the smaller resistance of the series of eleotric magnets and the fact that the reduction in length of the pole-pieces renders it possible to employ a smaller current. The device may be applied to any form of feed-board by simply slotting the upper face thereof and forming the openings 12 for the passage of the side plates 13, while the employment of ordinary electromagnets greatly reduces V4the cost of manufacture and installation, as Well as the expense of subsequent operation. In

mills which ordinarily are run during the whole twenty-four hours of a day and electric lights are employed at night the storage batteries may be charged during the night and used during the day, while at the same time the shutting down of the mill will not denergize the magnets and release the accumulated particles of metal.

While the construction herein described, and illustrated in the accompanying drawings,is the preferred form of the device, it is obvious that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages ol` the invention.

Having thus described my invention, what I claim is In a device ot' the class specified, the combination with the feed-board having on its upper face two slots 7 and 8 arranged transversely of the natural How of the material crossing the board, pole-pieces arranged in said slots with their Working faces flush with that of the board, there being a plurality of sets of pole-pieces, each having oblique ends and the adjacent ends being arranged in such contiguity as to insure contact with said pieces of all of the material passing over the board, magnet-cores, side plates connected to the cores and to the pole-pieces, and corewindings connected in series, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto aftiXedmy signature in the presence of two witnesses.

JAMES C. WINDER.

Vitnesses:

T. R. LILLY, T. J. AVERY.

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