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Publication numberUS1351563 A
Publication typeGrant
Publication dateAug 31, 1920
Filing dateFeb 6, 1920
Priority dateFeb 6, 1920
Publication numberUS 1351563 A, US 1351563A, US-A-1351563, US1351563 A, US1351563A
InventorsGaskill James C
Original AssigneeGaskill James C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable bar-coal screen
US 1351563 A
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Description  (OCR text may contain errors)



Patented Aug. 31, 1920.


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APPLICATioN FILED F5316. 1920.

1 35 l 56 3 Patented Aug. 31, 1920.


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ToaZZ whom t maj/concern.'

Be it lmown-thatl, JAMES C.l GASKILL, a citizen of the United States, and a resident of'vFairmont, in the county of Marion and State of West Virginia, have invented cer- `tain new and useful lniprovements in AAd-y justable Bar-Coal Screens, of whichlthe following is a speciiication. Y,

'My invention relates to bar coal screens, and more particularly to adjustable coa-l screens of this type. Y

It has been thecu'stom in coal screens of this type, when it was necessary to change thesize ofv thesci'een, to remove the bars and replace them with the sized bars necessary to make the screen ofthe desired mesh.V

This, isa long and tedious Operation and requires considerable time. My invention einbodies all of the desirable principles of a bar coal screen, but provides ymeans for adjusting the size ofthe mesh without the necessityy ofA removing and replacing the The objects of my invention are accomplished in devices very similar tothe type of bar screen now universally in use, and embodies vmechanism by which the size of 'the mesh may be varied automatically, by

'the simple operation of a cable and drum,

mechanism. By my invention, time and expense, which the use of the oldy type'of bar screen necessitated, has .been obviated and a more practical and efficient screen is the result. Y

lilith these and various vother objects in mind, I will morejspeciiically Vdescribe and point o utntlie Vfeatures of my invention in the specificationand drawings, in'whicln- Figure i half of the screenadjusted forsmall-sized mesh; Y f e 'Y f i `Fig. 2 is a side elevation of my' invention; y w

Fig. 3 is a `cross-sectional view taken on line 3-3 of Fig. 1; I 1

F ig. 4'is a detailed. sectional view oftlie pivotal connection of the'lug-supporting Spec'caton of lLettersv Patent.

is aitrop'plan view ofjmy im-Vv proved adjustable bai' coal screen, with one-.

ands are modiiicationsof the bar- Paten 'In thedrawings, 1 yindicates side beams upon which my screen is supported. These beams may be supported in any vsuitable manner, but as they .form no Vpart of ,my present invention l will not'describe them in detail. Arranged transverselyV 'of these beams 1 are I-beams 2, here shown as four in number. These I-beams are rigidly secured to the beams 1 inV any suitable man-` ner. Supported transversely of these VI- beams2 and parallel with the'beams lare threeH-beams, the central H-beam 'being rigidly secured to the I-beams 2 in any suit,-

cated by 5, and as shown more particularlyf in Fig. 4, one ofthese barsl has its. end biev furcated, as at 6, to receive the reduced end '7 of the'other bar 5 to provide a pivotal sies. i

JAivIEs c. GAsKrLL, or'rAIEMorir, WEST via-ernia.

y ted am; ai', 1920. Appiieatioviea `February 6, 1920. seriai No. 356,717. I

connection.` The screen bars are indicated.`

by 8.V Loosely mounted ineach of the'v bars which have. reduced ends Y10 vforming a shoulderll, which rests -iiponl the upper face4 This reduced portionv 10' of' of the bars 5. the lug 9 is looselyv held indrilled holes 12 in the members. A pin 1B inserted in the projecting end .of the lug 9 holds the lug in the member but permits its oscillationi edge of the screen? bars 8` is adapted torest.

These screenA bars-.8 lia-veat their opposite ends openings which permit .themte be fastened in the lugs contained vinthe bar supporting members at either end of the screen.

By referring o and 6, this bar lsecuring meansivill be ymore readily understood. Fig. .6 shows the upper'endl of the screen bars having a bayo o .is a series of screen bar-carrying Alugs 9,

more particularly to Figs.

net slot 15. Fig-.5 shows the lower vend of` the screen bar'S provided Vwith a slot 16 eX- tending longitudinally thereof. transversely of the slots `14 in theY series of Vlugs at the two ends of the 'screens are pivot pins 16', shown more particularly in Fig. 4.

Iny positioning these bars in the lugs, the slotin the lower end is designedto straddle y thev pivotpiiis 16 in the lug at the lower Secured" end of the screen, while the pivot pin in the lug at the top ofthe screen is adapted to pass into the bayonet slot through the open# willbe h eld securely by the lugs 9 and will retain their relative parallel position during the voperation of the adjusting feature of the screen.

VAs hereinbefore stated, the-central H-beam 3 is rigidly secured to the `Ibeams 2, and the inner ends of the lug supporting members 5 are pivoted to this stationary'H-beam 3. By reference to Fig. 4, the manner in which this pivotalconnection is made will be more readily understood. The lower end' of lug 9 is f made longer than the others, and its end 20 extends through a hole 21 drilled through' one side of the H-beam 3, and a pin 22 passes through the end 2() of this lug 9 and secures the lug against vertical displacement. In-

terposed between the pivotal connection of the bars 5. and the top face of the H-beam 3 isa liller member 23, which allows suflicient clearance space between the bars 5 and the H-beam 3 to permit the lower ends 10 of the lugs 9 to pass the H-beam 3 when the screen is operated for adjustment. I

. The outer ends of the lug supporting members 5 have a pivotal connection with the .H- beams 4, as shown at 24. This pivotal connection is very similar to that described in Fig. 4, and reference to Fig. 3 will more clearly disclosev this connection. y The lug 9 is extended Vas in the case of the central pivotal connection, and Vhas a pin passing through the extended end and. under the fiange of the H-beam 4 in exactly the same manner as that shown in Fig. 4.

From the foregoing it is evident that byY moving the H-beams in an endwise direction, with the H-beam 3 as Va pivot, the distance between the screen bars 8 may be varied, these .bars being held in their relative parallel position by the lugs 9, which oscillate in the' holes. 12 throughthe members 5 when such adjustment is being made. Y

In order to provide means for cenveniently slidingV these H-beams 4, I provide acable and drum mechanism, which I willnov.`

v describe. Mounted upon the outer sides oi tlie Hbeams 4 are brackets 25 supporting Mounted preferably pulleys 28 and 28. I also provide a drum 29, havingv integral therewith a gear 30. This drum may be located in any suitable place, and I have here shown it adjacent the screen member. It is obvious, however, that with the cable connections, this drum member may be located at'any convenientplace.V For operating said drum I provide a pinion 31, connected with a handle 32 and having holding dog 33. A cable 24 has one Vend l the drum .29, the cable continuing over pulley 28 and thence over pulley 26'-, secured l to the slidable H-beam 4 and having its end secured to the frame, here shown at the same point as the other end of the cable. A turnbuckle 35 is providedrfor keeping the cable tiOht.

@From the mechanism described above, it is obvious that by operating the yhandle 32, and thereby rotating the drum 29, the cable may be drawn in one directionor the other and thereby slide the'H-beam 4in either direction. By reference to Fig. 1 it will be seen that the drum andcable mechanismhasbeen operated to slide the H-bea1n4 to its lowermost position, thereby reducing the space-between the screen bars 8. This drumfand cable mechanism is duplicated on the other side of the screen, and as its operation which controls the other half of the screen is identical with the one-hereinbefore described-,ino further mention of the same need be made.

It shouldbe noted, however,`that byeX- tending the shaft carrying the drum 29 transversely of the machine, both drums might be carried by this shaft and the two "drums operated simultaneously from one side of the screen.

In orderV to provide means` for directing the coal upon the portion of the screen which can be used, IV provide side plates 36 and 37,

which, as shownV clearly in Fig. 2, are supported above the coal bars 8 to form a cleari i Y ance, soras not .to interfere witlrthe adjustclearly indicated in Fig. 1 of thedrawings. j

raised, as shownin Fig. 2, to permit the withdrawal of the bars 8, should occasion for' their withdrawal occur at any time. A

' This plate39 is ypivoted so that it may be transverse opening Y40 is provided lin .the screen bars 8 for inserting aV hook or otherinstrument for the these screen bars.

TheV side plates 36 and 37 may 'be supported in any suitable manner, preferablyV upon the tipple with which these screens areV usually associated, and I have here'- shown in purpose of y vwithdrawing dotted lines a portion of such tipple or other structure 41, on which these plates are held by means of brackets 42.

A transverse plate 48 is shown at the lower ends of these directing plates 36 and 37, and I have shown this plate as supported by a transverse beam 44 extending across the beams 1.V

I find it desirable in some instances to use other forms of lug 9, and by reference to Figs. 7 and 8 the exact form oi? these lugs will be readily understood. In Fig. 7 the lug.9, instead of having the reduced portion forming a shoulder, is provided with pin 45 which rests upon the upper face of the member 5, while a pin 46 extending transversely of the lug 9 secures this lug to the member 5, but permits its rotation. In the structure shown in Fig. 8 a collar 47 is formed upon the lug` 9 and rests upon the member 5, while a pin 48 extending through the lower end of the lug retains it in the member 5. The two modilied forms of lugs just described are ofttimes desirable, in that they are less expensive to manufacture, as they eliminate the necessity of turning the lug down to produce the reduced end, and therefore, while I have shown as my preferred form the lug with the reduced end, it shall be understood that either of these modifications may be substituted without departing from the spirit or scope Vol? my invention.

I also find it desirable, when the dimensions oi' the screen are increased, or, in other words, in screens having larger screening Vsurfaces than the one herein shown, to form the lug-carrying members in two parts, as shown very clearly yin Fig. 9. In this form, instead of having the lug-carrying members of one piece, as shown at 5 in Fig. 4, I form this member in two parts, indicated by 49. In this form the'central pivot is made-by inserting a link 50 and using two of the lugs 9, here indicated by 51', as securing pins for one end of this link 50. It will be seen that these lugs 51 have their ends extended slightly below the other lugs, as shown at 52, and a pin 58 retains these lugs in place and rigidly holds the link 5() to the members 49. A lug 54, similar to. lugs 5 1 except that the reduced portion is longer, extends through the members 49 and the free end of the link 50, and throughv a hole 55 drilled in the H-beam 3. A pin 56 passing-through the projecting end of this lug 54 retains the lug in place and provides the proper pivotal connection Jfor the members 49. In this construction it should be noted that the pins 13 of the lugs/9 bear on the Vlower faceof the upper member 49, while the lug has an end projecting into an aperture 57 in the'lower member 49. Y

I will now describe briefly the Yoperation of my invention. When it is desired to change the size of the mesh of the screen, for instance, from that indicated in the section B has been operated to decrease the size of mesh, while the section A is, shown as remaining at a large mesh. It is obvious in Fig. 1 that by operating the drum controlling section so as to'position this similarly to section B, the screenwillbe-transformed 'to one of a smaller. mesh. It is consequently also obvious that by reversing the operation the barsmay be separated so as to provide a screen of large mesh. During the adjustment .of the screen the members 5 move about the pivot point upon the H-beam 3, which is stationary, while the H-beams4 slide in an endwise and slightly transverse direction, carrying with them the outer ends of the members 5. T he lugs 9, as hereinbefore described, aremounted to oscillate in these members 5, and therefore, as the `mem bers 5 are moved the lugs rotate within the drilled holes 12, and the bars 8 are therefore retained in their spaced parallel relation. y It should also be noted that should any of the bars 8 become damaged orbroken, '95 they may veasily be withdrawn by raising the plate 39 and inserting a tool into the aperture 40 in thebar 8, sliding the bar in an endwise direction so as to cause the pivot pin 16 to register with the opening 17 in 100 the bayonet slot 15, whereupon this end of .the bar 8 maybe raised to free it from the lugs 9, andV then by. additional 'endwise movement the bar may be withdrawnso as s to free therslot 16 from its pivot pin`16. 105 Thus, new screen bars may be inserted, and it should be noted that the use of nuts andbolts is dispensed with and the operation of replacing damaged screen barsV made very simple. Y Y i ,Y

The side plates 86 and37,together with the plate 89, coperate to direct the 'coal upon the portion 'of the screen which Vmay be utilized as` screening surface.

From the foregoing it will be seen that I 115 have provided a bar screen which is simple in operation and embodies the Vfeatures of the bar screen now universally in use. lt-

'should also be noted that various modifications may be resortedto without departing L20 from the spiritand'scope of my invention. Y Y


transverse members, a multiplicity of spaced parallel bars, and lugs carrying said bars, said lugs being mounted upon said transverse vlug-carrying members, and said additional longitudinal beams being'slidably supported by said transverse I-beams, as and for the purpose set forth. i

`2. In a device of the class described, a frame, comprising side beams and transverse I-beams, a stationary central longitudinal supporting beam mounted upon said I-beams, a multiplicity of spaced parallel bars, lugs adapted to carry said bars, transverse,membersv supporting said lugs, said transverse members being pivoted to the stationary central longitudinal supporting beam, additional longitudinal beams pivotally supporting the outer ends of said transverse members, said additional beams being slidably supported upon said transverse I-beams, and drum and cable means for sliding said additional longitudinal beams transversely of said I-beams, as and for the purpose set forth.

l3. vThe combination with screen bars and ymeans for supporting said bars in spaced parallel relation, including rotatable lugs, of transverse members for carrying said lugs, a central stationary supporting beam providing a pivot for the 'transverse members and means for inde Jendentl swineinp` 7. l C c: the transverse members on either side of the Y central supporting beam to vary he distance between said screen bars said means comprising a cable and drum,1as and for the purpose set forth.

4. In a bar screen, a multiplicity of spaced parallel bars, lugs adapted to carry said bars, transverse members supporting said lugs and .allowing the oscillation of said lugs, a stationary central longitudinal supporting beam providing a pivot point for said transverse members, additional longitudinal beams pivotally supporting the outer ends of said transverse members, and means for independently moving these lastnamed'members, for the purpose described.

5. vIn a device of the class described, spaced parallel screen bars, lugs for carryin g saidscreen bars, said lugs having V- shaped openings to receive said screen bars, transverse lug-carrying members .provided with series of openings for receiving the lower ends of said lugs and permitting oscillation of said lugs therein, a longitudinal beam providing a stationary pivot for the inner ends of said transverse members, additional longitudinal 'beams supporting the outer ends of said transverse members, and means for moving said last-named beams to vary the distance between said screen bars, as and for the purpose set forth.

6. In a device of the class described,

spaced parallel screen bars, lugs for carrying said screen bars, said lugs having V- shaped openings to receive said screen bars, transverse lug-carrying members provided with series of openingsV for receiving the lower ends or' said lugs and permitting os-l cillation of said lugs therein, a longitudinal beam providing a stationary pivot `for the inner ends Aof said transverse members, ad-

ditional longitudinal beams supporting thek suspended above said screen bars, a plateA pivotally supported between said side plates adapted to direct and confine the coal upon the available screening surface of said screen, said side plates and pivotally supported plate being mounted soas to provide a vclearance to enableY the screen to be adjusted, substantially as described.

8. In a device of the class described, screen bars, lugs for carrying said screen bars, transverse members' supporting said lugs, V-shaped slots Jformed in" the upper end oin said lugs, transverse pins bridging y these V-shaped slots in the'series of lugs carried by thetransverse members at both ends of the screen, retaining slots formed in both ends of the screen bars adapted to stra-ddle said pinsV andretain said bars upon the lugs, substantially as described.

9. In a device of the class described, a multiplicity of screen bars, means *for removably supporting saidscreen bars, comprising lugs, said lugs having depending ends, transverse members providing supports forv said lugs and allowing the lugs to oscillate therein, and means coperating with the depending ends of the lugs forretaining them in position, substantially as described.

n 10, In a 'bar screen, a multiplicity of spaced parallel bars, means for removably supporting vsaid bars, comprising transverse lug-carrying members, lugs supported upon said lug-carrying members, said lug being capablek of oscillating and having formed therein V-shaped openings Ato receive the screen bars, and means for swinging the lug-carrying members to vary the distance between the spaced parallel bars, as and for the purpose set forth.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4956078 *Jan 30, 1989Sep 11, 1990Nordberg Inc.Feed prestratification attachment for high efficiency vibratory screening
U.S. Classification209/394, 209/395
International ClassificationB07B1/12
Cooperative ClassificationB07B1/12
European ClassificationB07B1/12