US2517174A - Spout magnet assemblage - Google Patents

Description

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SPOUT MAGNET ASSEMBLAGE William M. Bradley, Whitefish Bay, Wis., assigner to Dings Magnetic Separator Co., Milwaukee, Wis., a, corporation of Wisconsin Application March 13, 1948, Serial No. 14,692

l Claim. 1

The present invention relates in general to improvements in devices for removing tramp metal from material being spouted in bulk along an inclined chute or the like, and relates more speciiically to improvements in the construction and operation of spout magnet assemblages for effecting such tramp metal removal.

It has long been common practice to utilize both permanent and electro-magnets associated with the undersides of the inclined bottom plates of spouts or chutes, for the purposes of removing tramp metal from diverse bulk materials flowing downwardly along the upper surfaces of these plates. While some of these prior devices were quite satisfactory, most of them were too complicated and cumbersome, relatively frail and insuiiiciently durable, and too costly and unreliable in operation for general use.

It is therefore a primary object of my present invention to provide a powerful spout magnet assemblage for effecting tramp metal removal from diverse materials, which is simple and compact in construction, and which is also highly eflicient and dependable in operation.

Another important object of this invention is to provide an improved metal catching unit for spouts or chutes, which is exceedingly light but durable in construction and flexible in its adaptan tions, and which embodies permanent magnets of high intensity associated with readily accessible wear plates.

A further important object of the present invention is to provide an improved spout magnet structure which may be conveniently installed and subsequently manipulated and utilized for the removal of accumulated tramp iron, but which requires no attention while in normal use.

Still another important object of my invention is to provide an improved magnetic device for removing tramp metals from rapidly advancing bulk materials of various kinds, which may be manufactured in units of different sizes and at moderate cost by merely adding or eliminating standard interchangeably similar permanent magnets and certain other parts.

These and other objects and advantages of the invention will be apparent from the following detailed description.

A clear conception of the construction and operation f a typical -embodiment of my invention, may be had by referring to the drawing accompanying and forming a part of this speciiication wherein like reference characters designate the same or similar parts in the various views.

Figs. l is a perspective View of a fragment of a material spouting chute having one of my magnet assemblages applied thereto but swung into inactive position, and showing an accumulation of tramp metal adhering thereto;

Fig. 2 is a somewhat enlarged bottom view of four magnet spout unit embodying the invenion;

Fig. 3 is a similarly enlarged top view of the four magnet unit, but having a portion of one of the face plates broken away in order to reveal one of the normally concealed washers interposed between each magnet pole and the adjacent face plate; and

Fig. 4 is a transverse section through the assemblage of Fig. 2, taken along the line Ll-d.

While the invention has been shown and described herein as having been specifically embodied in a four magnet unit having permanent magnets formed of a specific type of material, it is not my desire or intention to unnecessarily restrict the improvement by virtue of this limited showing; and it is also contemplated that specific descriptive terms used herein be given the broadest possible interpretation consistent with the disclosure.

Referring to the drawing, the typical spout magnet assemblage or unit shown therein by way of illustration comprises in general, a rectangular main backing plate 6 having two parallel series of rectangular openings I therein; a plurality of laterally spaced permanent magnets 8 each having opposite poles 9, HJ spanning the corresponding openings 'I of the two series and coacting with the underside of the plate B beyond the opposite end edges of each opening; a pair of elongated rectangular face plates Il, l2 spanning the two series of openings 'l and coacting with the top or upper side of the plate 6 considerably beyond all edges of these openings; a rectangular washer I4 substantially filling each opening 1; and screws l5 securing the magnets 8, plates ll, I2 and washers i4 to each other and to the main plate 6.

The main supporting or backing plate B is preferably formed of relatively stiff and durable non-magnetic material and is provided along one edge with a strong hinge I5 for effecting swinging attachment of the magnet unit to the bottom I1 of a material spouting chute I S, as clearly shown in Fig. 1. The size and shape of the plate 6 and the hinge mounting thereof, should obviously be such that the plate 6 will provide continuity of the inclined spout bottom l'l when the magnet assemblage is in operating position,

and the unit may be detachably retained in such position in any convenient manner. The chute l 8 may be utilized for the purpose of spouting various kinds of bulk materials which contain objectionable tramp metal such as cap screws and metallic fragments I9 as illustrated in Fig. 1, and it is the function of the improved magnetic separating unit to remove and retain this objectionable magnetic material as the bulk material ows or advan-ces down the chute i8.

The permanent magnets 8 are of interchangeably similar construction, and are prefer-i.

ably formed of special material such as Alnico metal adapted to be intenselymagnetized and to permanently' retain such magnetism. This material contains aluminum, nickel, cobalt and iron, and the poles 9, I of the magnets 8 are formed integral with but project laterally away from the magnet bodies to thus provide horse-shoe shaped magnets. While the magnet poles 9, lll of each magnet extend beyond the end edges of the adiacent openings 'I in the plate B, the individual magnets 8 should preferably be spaced apart as shown in order to eliminate necessity of machining and fitting them along the adjacent side faces, see Fig. 2.

The elongated rectangular face plates ll, l2 which span the openings 'l on the side of the plate opposite to that engaged by the magnets 8, are preferably formed of durable wear resistant magnetic material; and the rectangular washers i. may be constructed of similar material. These washers I 4 are of approximately the saine size and shape as their receiving openings 1, but may be slightly thinner than the plate li, so that final application of the screws I5 will cause the main plate 6 to be clamped between the plates il, l2 and the corresponr` ing magnets 8. Each of the screws l5 is preferably provided at one end with a head 2l embedded within and disposed flush with the upper surface of the adjacent face plate Il, I2; and has its opposite end screw threaded for the reception of a nut 22 coacting with a lock washer 23, see Fig. 4.

When the various parts of a spout magnet unit have been properly constructed as above described, they may be quickly assembled by merely inserting .the washers M within the main plate openings l, by thereafter positioning the magnets 8 and the face plates ll, l2 on opposite sides of the washers M. and by lfinally applying the screws I5, nuts 22 and lock washers 23 to iirrnly unite the parts and to clamp the magnets and face plates tc the main plate E. The spacing washers lli will then coact with the screws i5 to positively prevent subsequent vshifting of the magnets 8 and face piates ll, i2; and when the hinge it has been mounted upon a `chute bottom Il having a cut-out as shown in Fig. l, the main plate 6 may be swung into the cut-outand into alinement with the adjacent bottom sections of the chute i8, thereby placing the separator unit in proper position for normal use.

Bulk material containing tramp iron particles I9 may thereafter be spouted down the chute i8, and as these particles I9 enter the intense magnetic field created by the magnets 8 throughout the confines of the spout above the plates il l2, they will be caught and firmly held against the upper surfaces of these plates. The main sup-n porting plate a may then be periodically released and swung .downwardly as in Fig. l, whenever no material is being spouted, whereupon the objectionable accumulations of tramp metal may be readily removed andthe unit may be quicklyrestored to operating condition. In case the face plates I I, l2 become excessively worn or damaged, they may be readily replaced when the mounting plate S is swung to open position, but the unit requires no attention when in operation.

From the foregoing detailed description, it will be apparent that my present invention provides a powerful spout magnet assemblage which is obviously exceedingly simple and lcompact in construction, while also being highly eiiicient in operation and exible in its adaptations. The capacity of the improved unit may `be readily varied to meet different conditions of operation by merely increasing or diminishing the number of interchangeably similar powerful but light permanent magnets 8 and washers lll, and by correspondingly varying the length of the plates 6, li, i2.

` The several parts of the improved structure may -be readily constructed and assembled or dismantled; and by utilizing permanent magnets 8 formed of Alnico undesirable electric wiring is obviated and the device may be permanently magnetized to maintain a magnetic field of high intensity.

The use of the washers Hl confined within openings 'l in the main plate not only facilitates attachment of the magnets 8 and wear plates ll, l2 to the mounting plate E, but also prevents material from passing through the openings and insures firm clamping of the elements to each other; and while the plates 6, il, l2 and the washers ill are shown as being of rectangular formation, they may be otherwise shaped in order to meet various operating conditions. The assembled units may be easily installed and subsequently cleaned and manipulated, and may also be manufactured in various sizes for diverse uses at moderate cost; and the devices have proven highly satisfactory and successful in commercial operation for the protection of diverse machines and equipment.

It should be understood that it is not desired to limit this invention to the exact details of construction and to the precise mode of operation and use, herein shovm and described, for various modifications within the scope of the appended claim may occur to persons skilled in the art.

I claim: Y

A spout magnet assemblage comprising, a nonmagnetic rectangular mounting plate having two parallel series of spaced rectangular openings therein, a magnetic washer of approximately the same thickness of said plate lling each opening,

WlLLIAM BRADLEY.

rEhe following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,162,190 Woodford June 1 3, 1939 2,293,664 Roberts Aug. 18,1942

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