US236998A - Flood-gate - Google Patents

Description

UNITED STATES PATENT OFFICE.

WILLIAM DONNAN, OF BURGETTSTOWN, PENNSYLVANIA.

FLOOD-GATE.

SPECIFICATION forming part of Letters Patent No. 236,998, dated January 25, 1881.

` Application led'July 28, 1880. (Model.)

To all whom tt may concern: l Be it known that I, WILLIAM DoNNAN, a citizen ot' the United States, residing at Burgettstown, in the county of Washington and State ot' Pennsylvania, have invented a new and useful Im provement in Flood-Gates, which has not been patented in any foreign country, nor used in this, as far as I know,) of which the following` is aspeciiication. v

This invention relates'to certain improvements in Hood-gates; and it has for its object to provide an improved means for returning the gate to a normal position after it has been depressed bypassing drift-Wood or other dbris. This I attain by the apparatus and mechanism illustrated in the accompanying drawings, in

whichl.

Figure 1 represents a perspective view of my invention Fig. 2, a vertical sectional view thereof; and Fig. 3, a detached sectional View, showin gamoditication ofthe journals and bearings of the gate.

The letter A indicates the tlood-gate, which is composed of a horizontal beam, B, havingjournals G at its ends, and provided -with the pickets D, which stand vertically when the gate is in its normal position. The journal G have their bearings in the sills E, which a-re spiked to the bottom of the stream, at each side thereof.

The letters F Gr indicatethe springs by which the gate is returned to its normal vertical position after the passage of the drift-Wood. The spring F is secured to a sill,-I, coniined to the bottom of the stream in any suitable manner, andprojects forward under the gate at one side, being curved upward, as indicated. The spring G is attached to the upright K, secured to the bea-m B, and curves outwardly toward its lower end, which is adapted to bear and move against the spring F as the gate works back and forth.

The various parts of the gate may be constructed of any suitable material, such as wood or metal, either in part or wholly, and the journals may be secured to the side sills and have their bearin gs in the end ot the horizontal beam, as indicated in Fig. 3 ot' the drawings.

The operation ot' myinvention is as follows: The pressure of drift-wood bearing upon the side of the gate swings it forward, causing the spring G tobear against thespringF, the spring G moving against the curved face of the spring F as the gate advances7 the two yielding together. When the pressure is removed the springs operate simultaneously as a compound spring, to return the gate to its normal vertical position, and hold it until again depressed.

Having thus fully described my invention, what I claim, and desire to secure b v Letters Patent, is

The combination, with the flood-gate journaled in the sills secured to the bed ot' the stream, ot the spring F, secured to a sill fastened to the bed of the stream, and the spring G, secured to the gate, the two being adapted to operate together to return the gate to its normal position, substantially as specified.

WILLIAM DONNAN.

Witnesses:

M. It. ALLEN, J P. DONNAN.

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