US1297843A - Silt-gate. - Google Patents

Description

WI HARRIS.

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APPLICATION FILED FEB. 7| I9I8 1,297,843. Patent9dMar.18,1919.

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i' Specification of Letters Patent.

ratenteaiuar. is, 1919.

Application filed February 7, 1918. Serial No. 215,852.

To all whom, t may concern:

Be it known that I, WILLIAM HARnIs, a citizen of the United States, and a resident of Silver City, in the county of Grant and system of gates for a reservoir which may 'f be actuated at any time for causing the water in the reservoir to force the silt therefrom.

A still further object of the invention, more specifically, is the provision of a stand pipe and a drain off pipe together with a wedge-shaped gate, which when raised will leave an opening for starting 4the flow of water and thereby causing the silt to be washed through the drain pipe.

In the accompanying drawing:

Figure 1 is a'longitudinal vertical section through part of a dam, stand-pipe, and associate parts showing an embodiment of the invention applied thereto.

Fig. 2 is la view of the gate shown in Fig. l, same being on an enlarged scale.

Fig. 3 is a view similar to the lower part of the stand-pipe shown in Fig. 1, the parts being enlarged, and thegate shown in an elevated position. Y

Referring to the accompanying drawing by numerals, 1 indicates the bed of a reservoir, and 2 the dam which is constructed in any desired manner. Arranged in the reservoir, at the oot of the dam, is one or more stand-pipes 3, which at the lower end opens into a drain-pipe or sluice-way 4 whereby the silt 5 and some of the water 6 may freely flow from the reservoir to the down-stream side of the dam. The dam is of course provided with the usual spillway so as to limit the water to the high water level 7 or low water level 8. A plurality of flood-gates 9 are provided in the stand-pipe 3, said gates having openings and gate members l0I' any desired construction, preferably a gate which may be moved upwardly and downwardly from the platform 10. The platform 10 also accommodates a suitable lifting mechanism l1 for gatesrodlQ, which rod is connected with thev gate 13 and the various Vgate members 111 are connected with the stand-pipe 9 and gate rod 12 for guiding the same upwardly or downwardly.

The gate 13, as shown in Fig. 3, is tapering on one side while the opposite side engages flatwise the shoulder 15 of the stand-pipe 3 in the end of the drain-pipe 4 so as to normally close the opening 16. When this opening is closed the silt 5 begins to accumulate and packs tightly against the gate. If this silt was not removed it would eventually substantially fill the reservoir and thereupon make the reservoir useless. Various means have been heretofore designed to remove this silt in small batches or in large batches. In the present invention the provision of the tapering gate is very important, as it provides an opening or passageway 17 between the silt and the gate, when the gate is raised as shown in Fig. 8, whereupon some of the water 6 in the reservoir may flow through said passageway and carry with it some of the silt. Even though this may be a comparatively small stream it will quickly enlarge the opening and in a short time all of the silt in the vicinity of the opening 16 will be washed therethrough and caused to pass through pipe 4. Usually the pressure of water and the movement thereof will cause the silt anywhere from one hundred to two hundred feet above the stand-pipe t0 be washed through opening 16. Any desired number of these stand-pipes could be provided, according to the various requirements. It is also evident that these pipes could be arranged either adjacent the dam or upstream as far as desirable.

In order to remove the silt all that is nee-y essary to do is tooperate member 11 for raising gate 13 and then wait until the water automatically causes the removal of the silt, after which the gate may be lowered and the reservoir is then in a cleansed condition ready Jfor use. It is, of course, evident that the gates may all be opened at one time, or one gate at a time, and the gates may be opened at any time, but preferably for the conservation of the water the gates are opened only when water is passing over the spillway. In this way the waste water is utilized for cleaning the silt and consequently the level of the water in the reservoir need not be lowered. The gates may be opened at any time, but preferably are opened sufficiently often to prevent the silt from reaching the gates 9.

l.What claim is:

l. A silt gate of the character described comprising means forming a passageway from the upstream side ot a dam to the downstream side ot said dam, a gate at the upstream end oi said passageway adapted when closed to form an abutment against which silt may accumulate, said gate being provided with means on the upstream side to torni an opening in the silt on raising the gate to allow the water above the silt to pass and carry along the silt adjacent said opening.

A silt gate of the character described comprising means forming a passageway from the upstream side of a dam to the downstream side of said dam, a gate at the upstream side of said passageway adapted when closed to form a support against which silt may accumulate, said gate being formed on its upstream side with a beveled face inclined from the bottom to the top, with the top farther upstream than the bottom, said bevel forming an opening in the silt on raising the gate to allow the water above the silt to pass and carry along therewith the silt adjacent said opening.

3. A silt gate of the character described comprising means forming a passageway from the upstream side of the dam to the downstream side of the dam, a wedge-shaped gate normally closing said passageway, said gate hai/'ing the small end at the bottom whereby when the gate is raised vertically there will be left a space between the gate and the silt previously resting against the gate so that water may pass and start to wash said silt through said passageway, and means tor raising and lowering said gate.

WILLAM HARRIS.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Eatents, Washington, IB. C.

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