US301669A - Dredger - Google Patents

Description

(No Model.) A. LANAN.

DRBDGER.

Patented Jul 8, 1884.

ATTORNEYS.

UNITED STATES Parent Orrrcn,

.GEORGE A. OALLANAN, OF NEW OOMERSTOlVN, OHIO.

oneness.

SPECIFICATION forming part of Letters Patent No. 301,669, dated July 8, 1884. Application filed March 29, 1884. (Noinodeh) lating its clip, all as hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part of this specification, in

which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a cross-section of a canal or other water-course and side elevation of my improved dredging apparatus. Fig. 2 is a plan view of the scoop and part of the floats on an enlarged scale, and Figs. 3 and 4: are details of the derrick. I

On the bank of the canal or other watercourse I set up a derrick consisting of a center post, a, with a boom, b, suitable guys, 0,

boom-suspending rope d, and anadjustable brace, e, said brace being pivoted to the boom suitably to be shifted along the toothed rack f on the post, and the post being set in a substantially-bedded foot-step block 9, and stayed at the base by a chain, h, and stake ,2 against the thrust of the hoistingrope j, which extends from the pulley-block 7r at the base of the post to the Windlass or engine employed for working the scoop, and to the hoistingrope which runs from pulley is over the pulley lat the top of the post, and between two pulleys, m, at the upper end of the boom. I connect a suitable dredging-scoop, n, by the bail 0, so as to be pulled along the bottom of the water-course from the opposite side, to gather a load, and up the bank q, to be discharged, said scoop having a rope, 1;, connected to the rear end for pulling it back when empty. The boom 1) overhangs the bank q sufficiently to change the direction of the scoop by the pull of the rope, so that the scoop will be hauled up and along the bank out of the water thereat, to be emptied into a scow, or on the bank, or into a cart thereon, as preferred.

The rope j, for hauling up the scoop, may ex tend across the stream, to be worked at the same place where the pulling-back rope p is worked, and by the same means.

For controlling the scoop, to guide and direct it when getting its load, a yoke, s, is pivoted to the sides at t, where the rope connecting bail 0 is pivoted, and extends around the back end of the scoop, where it has a latch, u, fitted to a tongue, r, extending rearward from the yoke, to set the yoke up or' down along the curved bar to to alter the pitch ofa pair of lever-handles, w, connected to the sides of the yoke 8, about midway between the pivots t and the cross-bar of said yoke, and extending upward suitably for being utilized by persons standing on the floats y at the sides of the scoop, to set the point of the scoop for running into or out of the ground at the bottom oi the water-course. The lever-handles are connected at the top by a cross-bar, z, for staying them. The tongue 11 has a cross-bar, a, at the end for handles, by which to man. age the scoop when raised out of the water.

For floats on which the attendants may stand each side of the scoop for managing it, I employ two long narrow rafts, 31, extending from the bank as far out as the scoop is to be worked, and being connected together by a cross-bar,

.b, behind the scoop, from which stay-ropes c" extend to the bank for staying the float against the current. The floats will also be secured at the other end to the bank, and thus the floats serve to keep the scoop from being floated away by the current. The guys 0 connect with the top of the post abya cap, d, that the top of the post is pivoted in, enabling the post to be turned, and the pulley-block k is connected to the post by a disk, e, through which the lower pivot of the post passes, and the stay-chain h c is also connected to said post by the same disk 6, so that the stress of the rope j is sustained, mainly, by the chain h and stake The brace eis employed to resist the tendency of the boom 1) to swing upward under the pull of the rope j when hauling up the scoop, and the toothed rack f is employed to set the brace according as the boom is raised or lowered by its rope d, and the rope j is made to pass between two pulleys, m, in the end of the boom, so that it may run on one or the other, according as the position of the boom and of the scoop give it direction.

To prevent the scoop from tilting forward or backward on the pivots 25 when being hauled up the bank with its load, I employ a rod, f,

, to hook the arms at to the bail o for a stay, to

keep the scoop sufficiently upright to retain its load, said rod being pivoted on the crossbar 2 of the handles as, and having a hook at 9, adapted to hook onto the bail 0 at or about Where the hoisting-rope j connects with the bail. Said rod f is to be detached from the bail while the scoop is taking the load, but is to be hooked on just before the scoop ascends the bank.

I am aware that double pulleys on swinging booms for operating scoops in various lines of draft are old, and I therefore do not claim such invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of a derrick, scoop, and floats for comprising a dredging apparatus to be worked by the ropes j and p, substantially as described.

2. The derrick consisting of center post, a, boom'b, guys a, boom-stay d, pivoted brace 6,

- and the rack f, in combination with a scoop,

a, attached to the hoisting-ropej, and having a backing-rope, p, substantially as described.

3. A scoop for dredging water-courses, having handles or, attached to its yoke s,-which is upper and lower sides of the hoisting-rope j,

in combination with a scoop, n, attached to the hoisting-rope, substantially as described.

6. The pulley k for the hoisting-rope, connected to the disk e, fitted to the step-pivot of the post, .and connected to the stay-chain h for the foot of the post, substantially as described.

GEORGE A. CALLANAN.

W'itnesses:

L. R. MOO ELLAND, Gno. L. TAYLOR.

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