US1344751A - Shaker-screen - Google Patents

Description

E. E. BERRY.

SHAKER SCREEN.

APPLICATION FILED APR.2. m9.

1,344,751. Patnted'June 29,1920.

3 SHEETSSHEET l.

I'M Ii W/WESS: Earl 5 Berry E. E. BERRY.

' SHAKER SCREEN.

APPLICATION FILED APR-2, I9I9. 1,344,75 1 Patented June 29,1920.

3 SHEETS-SHEET 2.

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E. E. BERRY.

SHAKER SCREEN.

APPLICATION FILED amz. 1919.

Patented June 29, 1920.

3 SHEETS-SHEET 3.

UNITED STATES PATENT oFFflcaf EARL E. BERRY, 0F KENNE'rT soU nE, PENNSYLVANIA, ASSIGNOB TO AM RICAN ROAD MACHINERY COMPANY, me, or KE NETT SQUARE, PENNSYLVANIA, A

ooaPonArrroN or DELAWARE.

SHAKER-SCREEN.

Application filed April 2, 1919. Y seriai' o. 286,949.

To all whom it may concern:

Be it known that I, EARL BERRY, a citizen of the United States, residingat Kennett'Square, county of Chester, and State of Pennsylvania, have invented a new anduseful Improvement in Shaker-Screens, of which the following is a full, clear, and exact: description, reference being had to the accompanying drawings, which form a part of this specification. r

My invention relates toimprovements in shaker screens and has for its object to provide an improved screen, wherein the material for screeningwill be preliminarily washed to remove any finely dividedmaterial and wherein the screens may be arranged in multiple decks without affecting the balance of the machine.

It is known that when screeningmaterial through a screen of any mesh, all material finer than the mesh passes through and mixes with the material of the desired size. For example, in screening sand, the materialcontains very finely divided foreign substances, as loam, which pass through the screen and are mixed with the sand, so that instead of getting clear sand, a mixture of sand and loam is obtained. In my improved type of screen, all of such exceedingly finely divided material may be removed and the sand obtained of a uniform size.

My invention also contemplates the use of multiple decked. screens, as, forexample,

screens of two, three, or four decks, the two upper screens swinging as a unit against the lower one or two screens as a unit, as the case may be. Such an'arrangement is found to be most advantageous, but the difference in weight between the upper unit and the lower unit, when two screens swing against one, as in the case of the three-decked type, or because of the difference in weight of the material carried by the two units in the two and four-decked type, causes an unbalanced condition, which throws excessive wear on the power plant and working parts and causes the apparatus to so operate as to render the efiiciency of such a construction very low. In my improved type of screen, the screens are placed in perfect balance, so that excessive wear .is eliminated and the screen rendered highly eflicient.

A preferred embodiment of my invention is shown in the accompanying drawings, in which' 1 Figure 1 is a partial plan view of the screen. I r l Fig. 2 is a side elevation of the screen structure. i i

Fig. 3 is aside elevation of the connecting rod orpitman connections in a'two-decked screen. 7

Fig.- 4 is a side elevation of the pitman connections in a four-decked screen.

From the transverse wooden cross-beams a depend flexible hangers Z), to the lower ends of which are bolted opposite ends of transverse angle bars 0. Near the opposite ends of the angle barsc longitudinally extending channel bars 03 are secured. These channels form the sides of the screen proper.

Specification of Letters Patent. P tent d J ne 29, 1920.

Fig. *5 is a cross-section along line 5+5,

- ig.6 is acrosssection along line 6+6, Figntlf ,v

Fig. 7 is a cross-section of a three-decked screen." I Fig. '8 is a cross-section of a two-decked screeni A 1 i Fig. 9 is a cross-section of a four-decked screen.

The channeled forming the sides ofthe upper or top screen are extended to provide the extensions 6. To the'extensions e is bolted a solid bottom fprovidedfwith the cross cleats f. The screens 9 are bolted to the channels d. In the two-decked screen,

the screens' are hung from the separate hangers and are adapted to work against eachbther. In the'three decked and four decked screens, the two upper screens hang as a unit and swing together against the lower screen or two lower screens, as the case may be, swinging as a unit. The

weights ii are bolted to the transverse angle bars a of thebottom screen.

The connecting or pitman rods are secured to the screens in the following manner: When the connecting rod-is fastened to one'screen only, as shown in detail in Figs. 3 and 5, an upright gusset plate 2' and angles 72 are bolted to the channel d, another angle 70 being bolted to the top of the gusset plate. The plate 1: and angleslc and is form a channel in which neatly fits the end of a connecting rod Z. To the gusset plate is attached a circular steel disk m closely fitting a recess in the connecting rod. Bolts a draw the rod Z to the plate 2', one of the bolts ex tending through the disk m. The disk m acts as a thrust bearing. WVhen the bolts are drawn up for attaching the gusset plate to the connecting rod, the described construction gives a'tight fit, eliminating the load from the bolts and avoiding the possibility of the parts coming loose.

Where the connecting rod is attached to a pair of screens to work them as a unit, as shown in detail in Figs. l and 6, the gusset plate 0 is bolted to the channels d of both screens. The angles k and is? are bolted to the plate, and these angles andthe plate 0 form a channel in which the end of the connecting rod Z neatly fits. The disk m fits into a recess in the plate, acting as a thrust bearing, and the bolts 11, one of which extends through the disk m', draw the rod Z to the plate 0 as above described.

The connecting rods Z are of wood and are tapered down to a small section in the middle so as to give the necessary flexibility. The ends of the rods adjacent the crank shaft 1" are reinforced by top and bottom metal strips 2) and a metal. The rod is orificed to receive its correspondingcrank on the shaft r.

In operation, the material to be screened is placed on the solid bottom f of the extended portion 6 of the upper screen. The screens are put in motion and a stream of water applied to the material. The shaking action causes the material to drag over the cleats 7, which, in connection with the stream of water, loosens, by a scrubbing action, any loam or foreign material sticking to the mass.

The finely divided material, as loam, passes to the bottom and is caught by the cleats f. The washed material then passes to the first screen g.

The weights h which are bolted to the lower screen compensate the lowerunit for the greater weight of the upper unit, thus counterbalancing a lower unit of one screen against an upper unit of two screens, or, as

may be advisable, compensating the lower unit for the greater weight of a similar upper unit arising from the greater quantity of material carried by the upper un t, on the screens and on the extension, wherein the material is preliminarily scrubbed.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

.1. In a shaker screen, the combination with a plurality ot'screen sections, one above the other, adapted to be reciprocated as units in opposition to one another, and a counterweight extending transversely of and secured beneath the lowermost screens.

2. In a shaker screen, the combination with a plurality of screens, one above the other, adapted to be reciprocated as units in opposition one to another, an imperiorate section lying in the same plane as the uppermost screen and forming an extension thereof, and counterweights secured at intervals to and extending transversely of the lowermost screen.

In a shaker screen, the combination with a plurality of sets of screens, one above the other, the screens of a set being adapted to be reciprocated. as a unit in opposition to the screens of an adjacent set as a unit, and a counterweight extending substantially across the bottom of the lowermost screen and secured thereto.

4. In a shaker screen, the combination with a three-deck screen and means for suspending the same, of a shaft, a connecting rod operable from the shaft and connected with one screen so as to vibrate the same, another connecting rod operable from the shaft and connected with the other two screens to vibrate them in unison, and transversely extending counterweights secured beneath the separately vibratable screen to equalize the weight of the two screens vibrating in unison. g

In testimony of which invention, I have hereunto set my hand, at Kennett Square, Pa, on this 27th day of March, 1919.

EAR-L it. BERRY.

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