US657508A - Coal-screen. - Google Patents

Description

No. 657,508. Patented Sept. H, I900. W. W. BROWN.

COAL SCREEN.

(Applicgqion filed Feb. 23, 1900.)

(No Model.)

@32 hmaae o UNITED STATES PATENT Church...

7 WILLIAM WIRT BROWN, OF WATERVILLE, MAINE.

COAL-SCREEN.

srE'crFI'dATIoN forming part er Letters Patent are. 657,508, dated September 11, 1900.

Application filed. February 23 1900. Serial No. 6,320. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM WIRT BROWN, a citizen of the United States, residing at Waterville, county of Kennebec, State of Maine, have invented a new and useful Coal-Screen, of which the following is a specification.

My invention relates to devices for sifting or screening coal from ashes and the like; and its object is to prevent the raising orescape of dust and fine ashes during said process, which is ordinarily very annoying to the operator.

In the accompanying drawings, Figure 1 represents a perspective view of the screenframe. Fig. 2 represents a perspective View of the sliding plate and cover. Fig. 3 represents a longitudinal section of said parts combined and readyfor operation, and Fig. 4 represents a cross-section on line w w of Fig. 3.

A designates the screen-frame, which is made of shovel or scoop form and consists of two vertical parallel side plates A, a vertical back plate B, connecting said side plates at their rear ends, a horizontal strip or plate E, connecting the front ends of the side plates at the bottom and forming the lip of the screen-frame, a series of parallel wires D, forming the screen-bottom, which extend from said lip to the bottom of the back plate B, and a handle 0, attached to the center of said back plate and projecting rearwandly therefrom. The front edges a of the -side plates A slant back and up from the lip or connectingstrip E to the upper edges 0/, which are horizontal, so that said upper edges are about two-thirds as long as the corresponding lower edges. The plates A, B, and E are preferably made of thin sheet-iron.

G designates a flat sliding plate, preferably of thin metal, on which the screen is to be placed when in operation. This plate has a central rectangular opening H of area equal to the inner area of the screen-bottom, said opening being surrounded at its sides and back by a raised rim or vertical flange I, parallel to the edges of said opening and far enough removed therefrom to leave a ledge 72, upon which the bottom edges of the side and back plates of the screen-frame may rest, said rim I fitting closely about the outside of the lower edges of said plates when the screen-frame is inposition, as shown in Fig.

3. At the front. edge of said opening H is hinged a cover F, made in two sections F and F which are also hinged together and provided with downward flanges J at their free edges. These sections are so shaped and arranged that when the screen-frame A is placed in position the section F will rest onthe inclined front edges on of the screenframe' and the section F on the horizontal top edges a, thus entirely covering the said screen-frame. The flanges J are adapted to fit closely around the edges a and a and the upper edge of the back plate B, thus preventing the escape of dust or ashes. A funnel-shaped hopper H is attached to the said sliding plate beneath the said opening H and tapers downward and inward therefrom to diminish the spreading of the dust or ashes and guide the same in its descentafter passing through the screen.

K designates an ash box or receptacle to receive the dust or ashes passing through the screen and opening H in the plate G, which is placed over said receptacle when in operation. This box K has anopening K in its top of width equal to the opening H and of such length that when the sliding plate is placed over it and reciprocated the hopper H, which projects down into the ash-box, will by striking against the edge of the opening K prevent the sliding plate from uncovering any portion of the said opening at any point of its movement.

The operation of this device is as follows: The screen-frame A, used as a scoop, is filled with the coal or ashes to be sifted and placed over the opening H within the rim 1, by which it is held in' place. The cover F, with its flanges J, is then let down on the open end and top of the screen-frame, thus closing it tightly at all points except the bottom.- The sliding plate and screen thus combined are then placed over the opening K in the ashbox and the said screen and plate reciprocated by means of handle G aforementioned, the hopper H, which projects down into said box, acting as a guide in the reciprocation. The coal and ashes are thus violently shaken up within the screen-frame and the finer and worthless material precipitated between the wires D in the screen-bottom through the funnel or hopper H and into the ash-box.

The cover-@1333; nZ lifted snificiently tor 51-1,

low the; screen firange loaded with the; Goal cloud of ashesfrom'rising. np out of thebo xr what I claim as new; and desire to secure by -n LettersPatent, is?

1.; In a coal-screening device; the eornbihation of a receptacle havingan peni'ng in its "'to'p, a; plate adapted tovcov er said opening;

a 1 material tube-"sifted an'dirto'fit oven-said and be reciprocatedTt-hereon, and provided with a central opening H; a framehaving a screen bottom and adapted to contain the j opening H; and a cover hinged tosaid plate and ad apted' to cover. said frame whenii r-pjosition,substantially asset forth;

2-. In Emboal-screenihg device, th'ecombina- V tionof a receptacle having an opening in its top, a plate adapted to cover said-opening and be, reoiprocated rthereon and" provided with a central open ingI-I', a funnel-shaped hopper attached to said plate beneath: saidopenin and tapering downward and inward;

' a frame having a screen-bottom and adapted to contain the materiab'to be sifted and tofi t over said opening H, and firGOVBI hinged t'o said plate and adapted tocover said-- frame when inposition, substantially asset-forth,

3. In a coal-screening device tli'ecombina tionof a reeeptacle-havi-ngarr, opening inits top; a" plate adapted" to cover said opening and be reciprocateditliereon and: provided with a central opening H, a fram'ehavinga screen-bottom and open at it 'sfront end: and top; adapted to; contain the: material to besifted and to fit over; said opening and a cover hinged to said plate eonsistingof two 7 parts hinged together and ad'aptedto cover respectively the-open end and topof said:

\ frame whenin position; substantially 'as'asetn 7 tion of areceptaicle having: an opening'in it's forth;

4; In a coal-Soreening-d'evice the coinbi'natop, a plate adapted to cover said opening and bexreciprocated' thereon and' provid'e d" *1 I rpm ding sai dfo eningeand. m ting: afledge 7i lgetyveflniitselfand theed'ges'of said opening,

land' a frame containingsthe material to be sifted, having a screen-bottom and adapted to rest -on said ledge over saidopening H and a togfitelosely within said'rimis'o as to provide T a" rigidfan-d secure means of connection be- ;tween s'aidsl'ldingplate' and frame, substam jg -tially 'asfset forth; l a

' 5i*'lif'acoal screening device a receptacle open at the top in combination with asliding' ypla-tehavinga centralzopeningiHiandiadapted i to reciprocateon said receptacle; and a shovel for scoop provided with a handleand having T a screen-bottom 'andadapted to fit over said i opening H, and acover. hinged lto saidplate Land adapted to cover thesaid scoop when in position,- sl'lhstantially as set forth- 1 v 6; I n-a-coal-" screeningdeviceAa receptacle Ro'pen atthetop in oombination-with a slifdin g I plate having'acen tral' opening H and ada ite'd 1 toa-reei'precat e -on said receptacle; a shovel or" f seoop='provided with a handle and"having a sereen -bottom and adapted jzt'o over said opening Hgn said scoop-'having its' 'sidesslant; '5 ing upward and backward froin its-lip; and

a cover hinged to said'plate at the front end f's'a-id opening-H", 'con'sistingo'f two:- parts ghinged together and respectively adapted to rest-om the said slanting front; ed ges and top edges: of tliescoo'p, substantially a's-set forth;

'"7: 1In 'a-coahscreening devicea receptacle open atthe topincombination with a sl'i-ding plate-having a central openin g and'adapt'ed I to reciprocate-1011' said; receptacle',a; shovel 'or seoop-pii0vid ed with a h-andleand having a Lsereen-jbottomqandl' adapted to; fit over said fopeni-n-g H, and acover hinged to'said plate 4 aft theefront'j end of said'opening' H, I consist 1 in ot two-parts hinged together and respecti-v'elyadz tpt'ed-r to -est on thejfront' and top edgesof the scoop, the said-parts having down- :ward flanges atthei'r' free-edges adapted to negated:- the edgesof said: scoop, substanfti-ally asset-forth; v v 5 v. a a Q'WIELI-AM WIRT BROWN; I 'Witnessesz e e-BROWN,

with-a central;openingH,a raised rim surllii; J; A; LETOURNEAU;

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