US86614A - Improved dumping-scow - Google Patents

Description

N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C.

ing-Scows and I do hereby declare that the following,

stantially as large flat-boats, decked over at their sides the load proposed, this being carried in a flaring or hop- Vwhich receptacle has an opening entirely through the closed thereby.

HENRY W'. WILSON, OF BOSTON, MASSACHUSETTS.

:Letters Patent No. 86,614,

daad Fama/ry 2,1869.

INEPROVED DUMPING-SCOW.

The vScheduleinferred to iu these Letters Patent and making part of the um.

To all whom-it may concern.-

Be ,it-known that I, HENRY W.W11.soN, of Boston, in the county orf Suffolk, and State of Massachusetts, have inventeda new and useful Improvement in Dumptaken in connection with the drawings which accompany and form part of this specification, is a description of my invention snicient to enable those skilled in the art to practise it.

Dumping-scows have for some years been made suband ends, so as to make a water-tight chamber or chambers, of suflicient capacity or displacement to sustain per-like' receptacle, made in the middle of the scow,

scow, which is provided with drops or flaps, which open downward and outward, the flaps being'double, closing along the longitudinal centre of the scow, and being hinged 'at each side ofthe opening.

These falls or flaps are held in place, so as to sustain the load, by means of chains passing from them over a windlass arranged over the fore-and-aft centre of the scow, so that, when the windlass is turned in one direction, the chains secured to the flaps slacken, and the falls Igravitate downward, and upon turning the windlass in the other direction, the flaps are raised and Now, these scows cannot be used for iilling upon ats up to their loaded draught of water, for the reason that the fiaps are so h'ung thereon, that, to open them to discharge the load, there must be a considerable depth of water below the bottom ofthe scow, so that the aps inay, in falling, project a considerable distance below the bottom of the scow, usually, in practice, about twenty inches, so that, unless the depth of water belowthe bottom of thev scow, when loaded, is about the distance to which the edges of the aps project when open, the load, not iinding a free outlet, wedges and jams inescaping, and thus prevents discharge of the load, except where the water is deep enough to allow the iiaps to assume a nearly vertical position.

My invention consists in so hinging .or hanging the aps of dumping-snows, that they will not project sufficiently below the bottom thereof to cause, by their striking on the ground beneath` such a contraction of the dumping-opening as will prevent the discharge of l the load.

In the practice of my invention, I prefer to have the edges of the flaps come flush with or Within the bottom of the scow; but a small projection beyond it, such 'as will not cause the aps to retain thel load, by insuicient opening, while not advisable, will be no departure from the gist of my invention.

The drawingillnstrates, in cross-section, an embodiment of my invention.

a is the bottom of the scow.

b 11, the outer sides.

c, the deck. v

e e, thel inner sides, forming the well through the scow, while the hopper, which is bounded by f f f, is partly elevated above the deck.

Communication between the hopper and the well is controlled by the flaps g g.- These are hinged and hung, as shown in the section, the iiaps being shown in black lines, as open or down, and as closed or up, in red lines.

The fore-and-aft windlass is marked h, and the chain from the flaps to the windlass is denoted by c It will now be obvious that wherever'a loaded scow of this modified construction can be iioated, there it can discharge, .and iioat oi free from its cargo, for the v hopper discharges into the well, the flaps opening Wide to prevent jamming or choking, and when the load is discharging, and no longer wholly rests on the scow, this rises by its buoyancy, so that it rises from the matter discharged.r

This rising of the scow begins the moment the load moves down inthe hopper, and the form which the deposit vtakes by gravitationis not unlike the reverse of the interior of the hopper.

I claim a iioating scow, having a mud-chamber, with inclined sides, and supported on the air-chambers, and having its long narrow naps, which make the bottom- 'outlet offthe mud-chamber, so arranged that when they are let fall by the windlass, they do not project beyond the scow-bottom, substantially as and for the purpose specied.

n HENRY W. WILSON. Witnesses:

J. B. CROSBY, FRANCIS GoULD.

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