USRE17012E

USRE17012E - August lxuter

Info

Publication number: USRE17012E
Authority: US
Publication date: 1928-06-26

Description

Jime 26,1928. Re. 11,012

A. LAUFER WHIRLPOOL FILLING AND PARRYING PLANT Original Filed Dec. 10, 1921 YINVENTOR.

M A TTORNEY' Reissuecl June 26, 1928.

, u NITED TA ES -AUGUST L liUFER, OF. VIENNA, AUSTRIA.

wnIBLPoo FILLING Ann PARRYING PLANT.

Original No. 1,544,996, dated July 7, 1925, Serial No, 521,492. filed December 10, 1921, and in Austria January 18, 1921. Application for reissue filed May 15,1928. Serial No. 276,719.

This invention relates to a whirlpool filling and parrying plant designed to prevent damages caused by the \v'hirlpool behind (onthe down-stream side of) a construction such as a weir, in the water.

By weir as used herein is meant any construction used for holding back or impounding the waters of a flowing stream or other body of water and over or pastwhich water, at least at certain periods, will flow. The term therefore includes gates and other barrage constructions. I

According to the present invention a suc tion channel is provided, which is located in front of on the lip-stream side of) a protesting plate, in orderto utilize the power of the water falling; over the construction for sucking off the water from below the protecting plate for producing the drifting of broken stones or gii'avel by t-heproduction of an eddy current moving towards the weir and thereby preventing consequent excai'ation of the bottom of the stream or tailrace just below the weir.

A few modes of carrying outthe present invention are shown, by way of example, in the accon'ip anying drawing in'which Fith.

section and plan View respectively, the device as appliedto a fixed weir. 1

3 shows a modifiedconstruction of a weir with the end of the suction channel terminating; in the rarefied space.

, Fig. 4 illustrates the application of the device to a sluice weir-or gate.

The plant comprises a protecting apron or plate to deflectthe falling water stream from the bottom of the stream bed and transform it into a harmless wavy stream, the plate and weir being so arranged that: an eddy or counter'current will be produced beneath the plate moving upstream over the stream bed. U H

The root of the protecting plate a is not built directlyfagainst the'body of the weir, but begins some distance away from the body portionof the masonry of the weir, so that the space thus formed between the said body portion and the root of the plate may act as a suction channel for sucking in the water from the space 6 below the plate and thus upstream from the downstream end of such space, and this may be accomplished by inclining the. upper end of the channel I) in a downstream direction or the 1 and 2 illustrate in longitudinal dit-ions is illustrated bythe arrows in 3 wherein the arrows 10 indicate the downupper mouth of the suction channel may terininatezin a rarefied space 1 such as is frequently produced under certain conditions below the falling stream.

The characteristic feature of the plant according to the present invention consists in that the effect of'suction of the falling 1 stream is utilized to produce a current along the under side of thepla-te a and at the bottom of the space 0 which is directed towards the weir (Z, the said currentcausing a considerable drift of broken :stones c or gravel towards the weir and producingan eddy which will 'carry much of any solid material transported over the structure upstream beneath the protecting plate where it will be deposited. I The power which isthus pro duced by the falling stream diminishes the iuertia'orinherent energy of said falling stream, thereby reducing its damaging effect; In order to adapt the deflection and transformation. of the falling stream to local conditions and at the same time to facilitate the sucking effect, the plate a may be of straight or curved formation and movable or immovable. This plate is spaced away slightly from the base of the weir, leaving a narrow spaceb." The necessary inclination of the plate with respect to the falling stream may beadjusted by raising or lowering the same by means of suitable arrangements, or the said plate may be raised or lowered automatically by means of the floating moment or; the plate. The curvature of the plate'secures a constant, striking angle of the stream of water with Varying water levels, which has a decided influence upon the action of the suction channel. The device may be executed in any desired material, for instance in con-' crete, iron or wood' constructions andso forth. The flow of water under these con Fig.

stream flow and the arrows 11 indicate the upstream. eddy produced by the suction through the passage b.

1. A weir having an extension downstream from itsdownstream side and overhanging the stream bed in spaced relation thereto to form a chamber under said exhis tension,said weir having a suction passage leading from the chamber and having a mouth opening through the structure in pm protecting plate secured in spaced relation sition to have water passing the weir flow past said mouth to effect suction in an upward'di'rection through the passage and in an upstream'direction beneath the overhanging extension.

2. A weir having an extension downstream from its downstream side and over-- hanging the, stream bed in spaced-relation thereto to form a chamber under said extension, said weir having a suction passage leading from the chamber and having a mouth opening through the structure in position to' have water passing the weir flow past said mouth to effect suction in an upward direction through the passage and in an upstreamdirection beneath the overhanging extensiomsaidextension comprising a to the body of the weir whereby the space between the plate and body of the weir forms the suctionpassage. v

3.,A weir having an extension downstream from its downstream side and overhanging the stream bed in spaced relation thereto to form achamber under said extension, said weir having a suction passage leading from the chamber and having a ,mouth opening through the structure in position' tohave water'passing the weir flow .past said mouthto effect suction in an upward direction through the passage and in an upstream direction beneath the overhanging extension, said extension comprising a protecting plate secured in spaced relation to the body of the weir whereby the space between the plate and body ofthe weir forms the suction passage, said plate being inclined to have its downstream edge higher than the edge adjacent the body of the weir.

4. A weir having an extension downstream from its downstream side and overhanging the stream bed in spaced relation theretoflto form a chamber under said extension, said weir having a suction passage leading from the chamber and having a mouth opening through the structure in position to have water passing the weir flow past said mouth to eflect suction in an upward direction through the passage and in an upstream direction beneath the overhanging fextension, said extension comprising a protecting plate secured in spaced relation to the" bodyof the weir whereby the space between the plate and body of the weir forms the suction passage, said plate being arcuately curved to have its downstream edge higher than the edge adjacent the body of the weir.

. 5 .,A1. weir having an extension downstream from its downstream side and overhanging the stream bed in spaced relation thereto to form a chamber under said extension, said weir having a suction passage leading from the chamber and having a mouth opening through the structure in posit-ion to have water passing theweir flow past said mouth to eifect suction in an upward direction through the passage and in an upstream direction beneath the overhanging extension, said extension comprising a protecting platesecured in spaced relation to the'body of the weir whereby the space between the plate and body of the weirforms the suction passage, said plate being hinged to effect suction in an upward direction through the passage and in an upstream direction beneath the overhanging extension,

said extension comprising a protecting plate secured in spaced relation to the body. of the weir whereby the space between the plate and body of the weir forms the suction passage, said plate being inclined to have its downstream edge higher than the edge adjacent the body of the weir, said plate being hinged at its upstream edge to permit vertical adjustment of its downstream edge. 7. A weir having an extension downstream from its downstream" side and overhanging'the stream bed in spaced relation thereto to form a chamber under said extension, said weir having a suction passage leading from the chamber and having a mouth opening through the structure in position to have water passing the weir flow past said mouth to effect suction in an upward direction through the passage and in an upstream direction beneath the overhanging extension, said extension comprising a protecting plate secured in spaced relation to the bodyof the weir whereby the space between the plate and body of the weir forms the suction passage, said plate being arouately curved to have its d0wnstream edge higher than the edge adjacent the body of the weir, said plate being hinged at its upstream edge to permit vertical adjustment of itsdownstream edge.

. AUGUST LAUFER.