US566793A - Half to thomas j - Google Patents

Description

(No Model.) 2 Sheets-Sheet: 1.

O. W. PARSONS. SGREEN AND SEPARATOR FOR GOAL, &c.

Patented Sept. 1, 1896 FIG.

W WW w: mums PETERS cu. Pnmcxuwo, WASH'INGYGN, n c

(No Model.) 2 Sheets-Sheet 2.

G. W. PARSON5. SGREEN AND SEPARATOR FOR GOAL, &c.

Patented Sept. 1

INVENTOR WITNESSES m: mums. PETERS co, mowaumon WASHINGTGN. o c.

UNITED STATES PATENT @rrrcn.

CALVIN WV. PARSONS, OF SGRANTON, PENNSYLVANIA, ASSIGNOR OF ONE- l-IALF TO THOMAS J. FOSTER, OF SAME PLACE.

SCREEN AND SEPARATOR FOR COAL, 800.

SPECIFICATION forming part of Letters Patent No. 566,793, dated September 1, 1896.

Application filed July 9, 1894:. Serial No. 516,947. (No model.)

1'0 all whom it may COILCCIIL. table over which the cross-bars B may be Be it known that I, CALVIN WV. PARSONS, a propelled in the direction indicated by the citizen of theUnited States, residing at Scranarrow. The cross-bars B, which may be ton, in the county of Lackawanna and State round, square, or any desired shape, may be 5 5 of Pennsylvania, have invented certain new attached to the links of the chain C, so that and usefullmprovementsin Screens and Septheir ends become the pins or rivets of the arators for Coal and other Materials; andI do links of their propelling-chain C, but any declare the following to be a full, clear, and method of attachment will suffice, the princiexact description of the invention, such as will pal requirements being that they be securely 1o enable others skilled in the art to which it apattached, and that they be parallel at right pertains to make and use the same, reference angles to the table and at equal distances being had totheaccompanying drawings, and from one another. The longitudinal bars to the letters and figures of reference marked A may also be secured and supported in thereon, which form a part of this specificaany desired manner, but mustbe well se- I 5 tion. cured and equally distanced from one another. The object of my invention is to afford a One of the principal features of my machine more convenient, economical, and effective is in the arrangement of these sets of bars A screen and separator for separating or gradand B. The arrangement is clearly shown ing coals and other materials than those in Fig. 4, where the near propelling-chain is 2o heretofore in use. removed. It will be observed that the widths My invention consists in the construction, of the holes through which material may pass combination, and arrangement of parts, as are determined by the distance between the hereinafter fully set forth and claim ed. longitudinal bars, and that the lengths of the In the accompanying drawings, forming a said holes are determined by the distance be- 7 5 25 part of this specification, Figure 1 is a side tween the cross-bars B.

View or elevation of one of my separators, The chains 0 pass over sprockets D and D, partly in section. Fig. 2 is a top view of the supported,respectively,by the bearings J and same. Fig. 3 isavertical cross-section of the J, attached to the beam or sill K of the upper part of Fig. 1 on the line a: y. Fig. 4 is framework or base of the machine. A sec- 30 a View in isometric perspective of the upper end series of longitudinal bars A are artable of one of my machines, showing the an ranged underneath, as indicated by the dotrangement of the bars and their connection to ted lines in Fig. 2. These are placed closer the chain. Fig. 5 is a diagram showing the together than the upper set, and thus are stationary bars of my screen in diverging p0 used to separate a size smaller than that sep- 8 5 35 sitions. Fig. (i is a diagram showing the staarated by the upper set. The cross-bars are tionary bars of my screen made in zigzag form. propelled over the lower set on their return Similar letters and figures of reference inrun, as shown in Fig. 1. dicate similar parts throughout the several 5 and G in Fig. 1 are chutes for the purviews. pose of conducting that which falls through 40 Referring to the drawings, A represents the upper bars to the head of the run on the longitudinal stationary iron bars made of lower bars. tapering iron with the thinner edges down- F. and E are guard-strips to keep the maward. These bars may have their upper terial from falling. ofi at the sides of the maedges plain, as shown in Fig. 4, or they may chine. 45 be made with offsets, as at 2 2, Fig. 7, de- F is a tail-chigte for conducting away the signed to give greater agitation to the cross larger sizes sep rated by the upper run or bars which are to be propelled over them. table. I

The bars A are placed at a distance apart The hopper of the machine is represented corresponding to the size of the coal, 8.20., to at g, and it is fitted with a gate G, by which 50 be separated and their upper edges are in the feed of the machine may be regulated.

the same plane, so as to form a platform or If the arrangement of longitudinal bars,

as shown by the diagram in Fig. 5, is substituted for the arrangement shown in thefirst four figures, several grades or sizes may be separated in one run of the cross-bars. Thus it will be seen that the mesh formed at 3. would separate a smaller size than the mesh at at, and there would be intermediate sizes separated on the sections of the run between the lines N and O and the lines M and N. Partitions maybe located at these lines, and it is evident that the sizes of material which will fall into each bin thus divided oif can be adjusted by moving the said partitions lengthwise of the machine. The barsA may be zigzagged concurrently in a horizontal plane, as shown in Fig. 6, which arrangement eficctually precludes pieces from being carried along, partially supported by a cross-bar and partially by sliding contact with a longitudinal bar. 'lhis'arrangement is found useful for grading wet coal.

The operation of my machine will now be. readily understood. It will be assumed that coal is the material to be screened or sepa rated.

The broken coalis fed into the hopper g and the gate G raised sufficiently to let the coal escape asfast as is desired on to the screening-table, composed of the bars A and the cross-bars B. Power is applied to the shaft d, Fig. 2, and the sprocket revolved so as to move the cross-bars in the direction indicated. The coal which is too large to pass through the upper screen is carried off the end of the machine and conducted away by the chute F. The smaller coal falls through and is caught by the chutes 5 and 6 and carried to the head of the bars. A. The sizes which are too large to pass between these bars, which are closer than the bars A, are carried beyond the end of the longitudinal bars A and drop through between the crossbars B, and are conducted away by the chute I. The smallerlumps,which pass through the lower bars A, may be further screened by means of other sets of bars, duplicates of the machinejust described, except that the bars are closer than the foregoing, thus making a screen of finer mesh, and this process is followed out until the finest or smallest sizes desired are separated.

It will be obvious that by my invention I provide a screen comprising longitudinal bars which in one form may be arranged in an upper and a lower series and in another form be arranged in the same plane in each Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an organized screening and grading machine of the kind described, the combination of a series of upper, and a series of lower longitudinal grading-bars, the distance between the bars of the one series being greater than the distance between the bars of the other series; an apron provided with transverse bars traveling over the said series of longitudinal bars in opposite directions, and means for moving said apron.

2. In a screening or grading machine of the kind described an upper table composed of equidistant fixed longitudinal bars, a lower table composed of a diiferent series of equidistant fixed longitudinal bars, in combination with a continuous apron composed of the chains C, O, andthe equidistant crossbars B, B, and said apron being adapted to be drawn over the said upper and lower tables in opposite directions by means of the driving-wheels D, D; and the cross-bars of the said apron adapted to cooperate with the fixed longitudinal bars of each series so as to form the transverse components of the meshes of the screens substantially as shown.

3. In a screening or grading machine of the kind described, the combination of an upper table composed of aseries of fixed longitudinal bars, a lower table composed of a series of fixed longitudinal bars in closer relation than those of the upper table; and the apron composed of the chainsC, O and cross-bars B, B adapted to be drawn over said upper and lower tables in opposite directions by means of the driving-wheels D, D; and the cross-bars B B of said apron adaptedto cooperate with each series of'longitudinal fixed bars soas to formthe transverse components of the meshes of thescreens, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

CALVIN .W'. PARSONS.

WVitnesses:

DAVID J. EVANS, CHAS. L. HAWLEY,

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