US2116225A - Vibrating screen - Google Patents

Description

May 3,` 1938. H. L. sTRUBE 2,116,225

VIBRATING SCREEN Filed July 11, 19:56 2 Sheets-Sheet 2 Patented May 3, 1938 UNITED STATES PATENT OFFICE l Link-Belt Company, tion of Illinois Application July 11,

Claims.

My invention relates to an improvement in screens and has for one purpose the provision of an improved screen box or screen body member.

Another purpose is the provision of a screen' 5 box which includes a plurality of superposed box or screen elements, removably secured together, whereby a multiple deck screen may be assembled.

Another purpose is the provision of improved means for securing two superposed screen boxes together.

Other objects will appear from time to time in the Vcourse of the speciiication and claims.

I illustrate my invention more cr less diagram- 4 I5- matically in the accompanying drawings wherein:

Figure 1. is a side elevation;

Figure 2 is an end elevation with partsv in section; and l 4Figure 3 is a plan view with parts broken away.

Like parts are indicated by like symbols throughout the specication and drawings.

Referring to the drawings, I generally indicates any suitable base members or supports, herein indicated as the longitudinally extending wood beams which may be supported on any suitable uprights 2. Mounted upon each of the longitudinally extending base members I, I illustrate brackets generally indicated as 3, each of which includes bottom abutting flanges 4 through which pass securing bolts 5, and upright end portions screen box. The side frame members are shown 50 are shown as outwardly anged as at 23. Mounted in the brackets 22 is any suitable vibratory structure herein shownas a rotor shaft 24 carrying a pulley 25, preferably adjustable unbalanced members 2'6, and an eccentric portion 2l. 28 is t' any suitable housing connecting the brackets 22 This extension is illustratedA Chicago, Ill., a corpora- 1936, Serial No. 90,048

and surrounding main extensions of the rotor. Any suitable transverse or cross members 30 are provided to connect the side frame members 20 of the screen'box.

I may, for example, employ angle members, some extending from side to side of therframe and others, as at 3l, extending only part way across the screen frame. 32 indicate any suitable angle brackets, bolted thereto, which carry longitudinally extending supports 33 over which screen cloth 34 may be tensioned. 'I'he cloth actually engages rubber covered portions or pads 35. 36 indicates any suitable horizontal shelf or flange upon which the edges of the screen cloth 34 are received. 31 indicates clamping members having a lower flange 38 hooked into the'edge of the screen clothand an upper flange 3B opposed, as a tilting abutment, to the inner face of the side frame member 2U.

' 40 indicates av screen tensioning bolt headed as at 4l and extending throughthe member 31, andexteriorly through the side frame member 2B. 42 is a wedge-shaped exterior abutment adapted to' be engaged by a nut 43 or any-other suitable-means for drawing the lower flange 38 of the member 3l inwardly toward the inner face of the side frame member 20, whereby to tension the screen cloth* The upper edge of the lower screen box member, as shown for example in Figure 2, is downwardly and inwardly inclined as at 50, in opposition to the'outer lower face of the downward and inward extension 2l of the side frame member 20 of the upper screen box. The two parts may be secured together as by bolts 5I.

As will be clear from Figure 2, assuming that the upper screen box is mounted upon supporting springsl 8, one or more lower screen boxes may be quickly and easily secured to or removed from it. All that is necessary is to oppose the portions 5D' of the lower box to the portions 2l of the upper box and then thread the bolts 5I through and tighten them up. The inclined portions 2l of the frame members 28 may all be apertured as at 52,-in readiness for the addition of additional screen boxes.

Whereas I have shown the supporting springs as secured to the-upper of a pair of screen boxes, it will be understood that two or more additional screen boxes may be secured to the original one. It will be also understood that, with very slight modification of the parts, the additional decks or boxes could be positioned above the screen box which is actually secured to the springs.

It will be realized that, whereas I have described and illustrated a practical and operative device, nevertheless, many changes may be made in the size, shape, number and disposition of parts without departing from the spirit o! my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to the precise showing.

I claim: l i 1. In a vibratory screen, a screen box includ ing a plurality of separable, superposed' box members, a base for said screen, a flexible connection between said base and one of said box members, means for removably securing said box members together, including opposed downwardly and inwardly extending portions conforming to each other, one associated with the lower edge of the upper of two adjacent boxes, and the other associated with the upper edge of the lower. of said two adjacent boxes, and means for securing` said opposed portions together, said portions and securing means lying entirely within the periphery of the screen boxes.

2. In a screen box structure, a plurality of superposed separable screen boxes, eachincluding side, framemelements and connecting cross said opposed portions, said securing means and ilanges lying entirely within the periphery of the screen boxes.

3. In a vibratory screen, a screen box having parallel side frame members, each said side frame member having an outwardly extending flange along its upper edge and an inwardly extending iiange along its lower edge, vibratingv means mounted -on said upper flanges, an additional screen box having inwardly extending flanges opposed to the inwardly extending flanges of the first mentioned screen box, and means for securing said opposed inwardly extending anges together, said flanges and securing means lying entirely within the peripheries of the screen boxes, a screeni'abric mounted in the second screen box, means for holding the fabricA in'position, such means beingA located below and masked by the inwardly extending ilanges.

4. In a vibratory screen, a screen box having screen box having inwardly extending anges l opposed to the inwardly extending flanges of the first mentioned screen box, and means for securing said opposed inwardly extending flanges together, said ilanges and securing means lying entirely withinA the peripheries of the screen boxes, said inwardly extending flanges being downwardly and inwardly inclined.

5. In a vibratory screen, a screen box having parallel side frame members, each said side frame member having an inwardly extending ilange alongits lower edge, an additional screen box having inwardly extending flanges opposed to the inwardly extending flanges of the first mentioned'screen box, means for securing said opposed inwardly extending ilanges together, screen mesh mounted on the lower screen box, and securing means therefor positioned beneath and vertically alined with' said inwardly vextending flanges, a screen vfabric mounted in the second screen box, means forholding the fabric in position, 4such means being located below a'nd'

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