US96991A - William sparks - Google Patents

Description

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Letters Patent N 96,991, dated November 16, 1869; antetlatell November 5, 1869.

COAL-SCREEN.

The Schedule referred to' in these Letters Patent and making part o! the same.

' To all 'whom 'it may concern Be it known that I, WILLIAM SPARKS, of the city of New York, in the county and State ot' New York, have invented and applied to use certain new and usefnl improvements in the New and Improved Coal- Screen, patented September 6, 1865; and I do hereby declare that the following is a full and exact description of the same.

My improvements consist, first, in altering the form of the hopper b, so as to render the whole machine more compact, byset-tingthe screens more directly under the hopper b, and screening several -kimls of coal at the same time; and, secondly, by rendering the whole operation of screening coal more inoffensive on account of dust.

To enable others' skilled in the art to make and use my improvements, I will proceed to describe their construction, application, and operation, reference being had to the accompanying drawings, and to the letters of reference thereon.

I construct my frame-work, a, ot` any suitable material, to support the hopper b in its proper position.

When more than one., or a series of hoppers, are to be used, the flame-work is to be constructed a-ccordingly.

The general form of the hopper b is to terminate with an angle at the lowest extremity, and at that point is situated the mouth or aperture ot' egress for the coal to the screen, as shown at c.

lhe coal may be checked or regulated in its passage to the screen by adjusting the inclination of the bottom of the hopper b, but I generally use a gate or scrcening-regulator l for that purpose, operated by the brake e, in connection with the bami-lever f, by the connecting-rod or pitman y, the leverfacting on a pivot in a slot, as shown at h.

The rack i, as represented, is to retain the gate or screening-regulator d, in any desired position, according to the size ot' the coal.

VThe form of the hopper b is shown. lhe sides are generally perpendicular, and about four feet apart, but the dimensions must'be regulated by the circumstances.

'lhe mouth or aperture ot' egress is about ten inches wide and four feet, or thereahouts, long.

The gate or screenillg-rcgnlator rl is secured in its place, to the `bottom -of the hopper b, by means of strong iron strap-hinges, or otherwise, the object being merely to check or prevent the too rapid descent ot' the coal upon the screen, and is regulated by the hand-level' f, Vas described above.

The screen k is constructed in the usual manner, except that the wire does not extend the whole length, but begins at about eighteen inches from the upper end, which part is there lined with sheet-iron, for the coal to strike as it falls from the hopper.

The sides of the screen are six oreight inches wide, tapering somewhat from the upper end, and the width to suit the mouth or aperture ot' egress o t the hopper Inns shown at c. l

The wire i'or the screen l.: may be ('rom one-fourth of an inch to threc-eighths, or as shall seem most suitable for the size of coal to be screened.

The screen la is suspended in its place, at c, in any suitable manner, or by means ot' iron plates and bolts and chains with hooks, so that the inclination of the screen may be varied by the links, as represented at l.

The screen in is i`or'the purpose of separating the still smaller coal from the dust, as it falls through the screen It, and requires to be about four feet long, the screen k being about six, or thereabouts.

lhe screen m is suspended from the lower end of the screen k, inclining invcrtcdly, and by means precisely similar, as represented at n. p.

Under the screen It is suspended an -apron or conductor, r, tbr the purpose ot' conveying the dust or screenings properly to the screen m..

The apron or conductor is-constrncted of sheet-iron, or ot'anyother suitable material, expanding across the screen, and extending two or thrrc feet, or as lmay best serve the purpose intended.

An apron or conductor is also attached to the screen m, in all respects similar to the one j ust described, both oi' which are tixed in their places and positions, represented at s k n m, by platesl and small scrc\v-bolts, or otherwise, as may bc desired.

Another mprovement'in the new and improved coal-screen is to line or cover the whole frame-work a with canvas or other suitable material, so as to enclose all the screens, except the necessary opening to deliver the coai into the cart, vehicle, or other rcceptacle, for the purpose ot' confining the dust.

My improvemeiits in the new and improved coalscreen, which are herein described, enable me to screen coal in a more thorough manner, and the use ot' the additional screen m still more diminishes the cost of coal.

'Io use my improvements, I piace the machine in a proper position, near the vessel, car, or way, leading to thc same, and having closed the mouth or aperture ot' egress c, by elevating the handleverj, by means ot' the rod n, or otherwise, and securing it with the pin o in the rack t', or in/a similar manner with the pin, as shown at r, I proceed to hoist or turn the coal into the hopper b as each cart or vehicle arrives, or other receptacle furthe coal is ready.

l open thegat-cd by means of the hand-lever j, if

down on the ground, and having ascertained the proper gauge of the mouth or aperture of egress '0, according to the size ofthe coal to be screened, I secure the gate d in that position, as before described, and close it when the cart or vehicle is loaded.

Vhen I use my machine in a coal-yard, -I screen the coal into the cart, using any ordinary hoistingapparatus, for the purpose ot' turning the coal into the hopper, from which the cart receives its load. Tile hopper b being of such dimensions as to hold several tons of coal, I continue the filling into the hopper, while the carts are gone, so that they are seldom or never kept waiting, thus eecting a great saving of time, as will be obvious, and besides screening and loading with Withesses:

J. M. MERCHUTT, E. S. GAYLOR.

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