US 1572472 A
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- H. E. DOREN DREDGE Feb. -9 1926. 1,572,472
Filed March 9, 1925 INVENTOR Henry E Daren wkW Patented Feb. 9, 1926.
UNITED v.s'raras HENRY E. DOREN, EDMONIJS, 'W'ASI-IIHGTDN.
Application filed March 9, 1925..
To @771 whom it may camera:
Be it known that I; HnNRY E. Donnn, a citizen of the United States of America, and resident of the city of Edmonds, in Snohoinish County and State of lVashington, have invented certain new and useful Im provements in Dred 'es, of which the following is a specification.
My invention relates to hedges of that type in which jets of water are empl yed tor disturbing the bottom and current flow for carrying away the materials disturbed by the jets.
The object oi the invention is to provide a simple and cheaply operated dredge ,for
work in channels having flow of water therethrough, either natural flow, as rivers, or tidal flow, and to remove such materials as sand and silt bars.
My invention consists, essentially, of abarge or float having mounted thereon means for discharging water from jets under pressure and deflecting aprons by which the natural flow of the water in the channel is deflected downwardly upon the bottom so as to increase its force and its silt-carrying capacity, until the material disturbed has been removed down stream a sultlcient distance to get it out or the way.
In the accompanyingdrawings I have illustrated my device in a more or less diagrammatic manner.
Figure 1 is a side view of my device as a whole.
Figure 2 is a side view illustrating in a somewhat larger scale certain details of construction of the mechanism.
Figure 3 is a face view of one of the current-deflecting aprons.
In the drawings, 1 represents a barge or float of any suitable type. This may be provided with means for self-propulsion, or be towed by another vessel. It is intended in the operation of my device to move the same slowly either up or down stream. Means should be provided upon the float for pumping water under pressure, the same to be discharged from the nozzles provided in connection with the deflecting aprons. In Figure 1 I have illustrated diagrammatically a boiler 10, an engine 11, and a centrifugal pump 12, together with a water storage tank 13. Any suitable type of mechanism for securing the discharge of water under pressure may, how ever, be employed.
'- The float is provided preferably at each .Serial No. 14,110.
end, and in some cases possibly at the sides,
angle thereof. changed as the circumstances dictate.
In the drawings I have shown l ua ues or beams 3 projecting at the stern and bow ro l? the barge, serving as a base by which the aprons may be pivoted and from which they may be controlled. These aprons are pivoted as at 20, near one end. At the other end of the apron a cross pipe or header 4 is provided, this having a number of discharge nozzles &0. Water is conducted from the pump or from the water pressure tank through a pipe, as 41, to the header 4. The header 4 is preferably made so that it may be rocked upon its longitudinal axis so as to direct the jets issuing from the nozzles 40 in any direction desired, within certain angular range. The jets discharged from these nozzles are directed downwardly and will loosen or stir up the bottom it it be of sandy or silty material.
It is assumed that there is a flow of water ina channel at the point where work is being done. The direction of flow is indicated in Figure 1 by the arrow 15. The aprons 2, being inclined downwardly and in the direction of flow of water, the current will be defiected downwardly and will be increased in velocity as it passes under the lower edge of the aprons, the same being the point where the material has been stirred up by the nozzle 40. In consequence it will be carried down stream.
In some cases it will be found desirable to have the pivoted upper end of the apron supported by links as 5, shown in Figure 2. Said links are pivoted at 20 to the upper edge of the apron and at 50 to the frame. work of the dredge. This permits bodily raising and lowering of this upper edge of the apron. The raising and lowering of the apron may be controlled through lines as 6 and 60, which are attached thereto and conducted over suitable guides mounted upon the dredge. In some cases the upper edge of the apron may be provided with beams as 62 extendingfarther upwards, and lines as 61 leading from drums as 63 may be attached ther t olilrai ing he o tb a d'ed e f the apron. The aprons may be raised and controlled by any suitable mechanism.
In operation the dredge Will be placed over a. sand bar or shallow place in the channel and will be slowly moved up and down the channel. The material will be stirred up by the jets and then removed by the current to some point where the velocity of flow has been lessened and sediment occurs. By making the header core rotatable to control the direction of discharge of the jets, a more elfective action is obtained than may be secured by having the same stationapron, as a means for controlling the angular direction of? the jets 40. These may be operated by hand or by power, as desired.
lVhat I claim as my invention is 2 In a dredge, a supporting hull, beams projecting beyond eachend ot' the hull, current deflecting planes pivotally supported from said beams to permit setting them to defleet the current downwards, a water pumping system, a header pipe extending along the lower edge of the apron and having supply connection with the pumping system, discharge nozzles carried by said header pipe to discharge downwardly, and means for rocking the header pipe to thereby vary the angle of discharge of the nozzles.
Signed at Seattle, King County, lVashington, this 28th day of February, 1925.
HENRY E. DOREN.