US703817A - Dredger. - Google Patents

Description

Patented July l, |902. s. A. PERRY.

D R E D G E B (Application led Nov. 6, 1900.)

2 Sheets-Sheet I.

(lo Model.)

No. 703,8!7. l Patented July l, |902.

*3. A. PERRY.

D R E D G E B. (Appliceian med Nov. e, 1900.)

(No Modem 2 shuts-.smi 2.

NITED STATES ATENT OFFICE;

RAYMOND A. PERRY, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO ATLANTIC GULF AND PACIFIC COMPANY, OF NEV YORK, N. Y.,

ANI? SAN FRANCISCO, CALIFORNIA, A CORPORATION OF VEST VIRGINIA.

DREDGER..

SPECIFICATION forming part of Letter-straten No. 703,817, datedruiy 1, 1902.A Application filed November 6, 1900. Serial No.35,630. [.No model.)

To @ZZ whom, it may concern:

Be it known that I, RAYMOND'A. PERRY,` a citizen of the United States, residing inthe city and county of San Francisco, State of California, have invented an Improvement in Dredgers; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to improvements in 1o apparatus for dredgingand excavating soil, and is especially designed to be used where such excavations are made in material which is submerged beneath water.

It consists in a mechanism by which the I5 excavation is produced by a forward-reciprocating movement in the line of the boat and apparatus, means for the allowing of such movement and the corresponding extension of the conveying-pipes, and mechanism for re- 2o tracting the apparatus after the forward c ut has been completed and'placing it to make another cut parallel with the first, whereby a series of cuts are made radially outward from a fixed point exterior to and at the rear 'of the dredge-boat.

My invention also comprises armeans for advancing the xed center and bringing it up to the rear of the dredge-boat after a complete cut has been made, so as to place the apparatus in position for another forward cut.`

It also comprises a novel arrangement of cutters operating in the line of movement of the dredge-boat and a suction-pipe and sections having horizontally-elongated'mouths transverse to the line of movement and extending behind the seriespof excavators'.

My invention also comprises details of construction which will be more fully explained by reference to the accompanying drawings, in which-. V

Figure l is a longitudinal elevation of my dredger. Fig. 2 is a plan of the same. Fig. 3 is a plan of the forward part of the ladder. Fig. Il: is an end view of the rotary cutters. Fig. 5 is a plan of the same.

In the art of dredging with apparatus in which the dredged material is disposed of by means of suction-pumps and conveying-pipes it has been customary to swing the dredgeboats about a pivot located within the boat Yboat from one side to another.

The cutters of my invention are designed to cut in the direct line of forward movement of the dredge-boat, andthe conveyingpipes are telescoped and slidable, so as to allow of such movement while the excavating is taking place and to allow the pipes to be again shortened while the boat is withdrawn and placedover another cut.

In the present case I have shown a boat or scow A, which is .termed a dred,f.,reboat,7 upon which is mounted the engine or motor and necessary machinery connecting with a ladder 2, which is hinged to one end of this boat and is capable of swinging up and down about its horizontal hinges, but without any independent side motion with relation to the boat.

A suitably braced and supported mast 3 is So fixed upon the boat, with hoisting-tackle of any usual or well-known description connecting with the ladder, whereby the latter may be raised during the progress of the cut or allowed to descend to the bottom.

Upon the inner or hinged end of the ladder is mounted a motor 4 of any suitable character, and through the necessary train of gearing power is communicated to drive a shaft 5, which is journaled and extends cen- 9o trally along the ladder to the front end, where it carries a bevel-pinion 6,*and this engages with a corresponding beveled gear?, mounted upon the shaft 8. This shaft carries a series of cutters 9, of which there may be as 95 many as required to make a cut of the desired width.

The shaft 8 is journaled in boxes carried by the front timbers of the ladder 2, which timbers extend transversely, as shown.

IOO

The cutters 9 are of such form and character that 'being pushed against thebank ot' earth to be excavated they will continually loosen and break it down, and the material thus loosened is drawn into the suction-pipe 10 by means of the suction-pump 11, carried upon the dredge-boat and driven by suitable motor and intermediate connecting mechanism.

By means of 'a flexible joint at 12, having the same axis of movement as the head of the ladder, the pipe is allowed to follow the movements of the ladder without impeding the passage of the material. Any suitable joint, such as the well-known ball-joint, may be employed at this point.

The main suction-pipe 10 is here shown as dividing into two branches 13, which diverge from the main pipe, and these branches are flattened and diverge at the mouth, so as to form wide rectangular openings 14, the combined length of which is equal to the transverse distance occupied by the cutters, and these mouths open just behind the cutters, so that material loosened thereby will b e drawn into these mouths and thence conducted to the main suction-pipe 10 and delivered through the pump 11, passing through the discharge-pipe section 15,which is mounted upon the boat A. In the rear of this boat is a second boat 16, and this boat has guides 17, through which vertical spuds, so called, are driven to anchor and hold this second boat firmly in position. Upon the front of this second boat and behind the boat A is a horizontally-operating device 18, the lower part of which is fixed to the boat and the upper part is turnable with relation thereto. Through the upper portion of this device passes a strong horizontally-disposed timber or arm 19, the front end of which is fixed upon the dredgeboat A, the rear end being slidable, as before described, through the turnable member of the device 18. This timber or arm serves to move the dredge-boat forward with relation to the anchored boat 16, and this is effected by means of chains or cables 20, passing around blocks 22, by which any desired multiplication of power may be effected, and finally upon a windingdrum, as at 23, by which the chain or cable can be wound up, and through the power-thus developed the timber 19 is forced forward with relation to the fixed boat 16, and the boat A is thus moved directly Ain line therewith, so that the excavators will continually dig and break down a section of material in the line of forward movement of the boat A to a distance equal to the forward movement effected by the mechanism herein described.

It will be manifest that some means must be employed for lengthening the dischargepipe 15 in unison with theforward movements of the boat A, and this is effected by a telescopic joint composed of an outer straight section of tube 24, within which the section 25 is slidable through a suitable stuffing-box,

the length of this telescopic section being sufficient for the required advance of the boat A.

When a cut has been completed to as great a distance as desired, the boat A is drawn back to the boat 16 by meansof a rope or chain 26, passing through blocks 27, by which power is multiplied to any desired extent, thence around guide-pulleys 28, and thence to the winding-drum 23, so that by winding in this rope or cable and correspondingly letting out the cable 2O the boat A m-ay be drawn back to the boat 16, the timber 19 sliding through its guide as it is retracted. It will be manifest that by reason of the turnable nature of this guide about its vertical axis the boat A may be turned to a very considerable angle with the anchor-boat 16. Thus the length from the guide 1S to the excavators at the front of the ladder will form the radius of the arc through which the boat and excavators may be made to swing during the work of excavation; but it is to be understood that no side or swinging movement takes place while the excavation is going on. The boat or scow A, carrying the excavator, is forced forward by the power-brought to bear upon the beam 19 through the cables and is thus forced forward to continually keep the excavator up to its work.

After the excavation has been completed to the full length of its cut the boat and excavator are withdrawn in the same line and are afterward placed in the line of. a new cut parallel with the first made, and thus each cut is made in the line of the boat until the whole width of the cut has been made from extreme side to side. It is then necessary to advance the apparatus in readiness for a new series of cuts. This is effected by temporarily xing the boat A by means ot' a Spud which is sunk into the bottom while the boat is drawn away to its greatest distance from the anchored boat 16. The spuds or anchors of the boat 16 arethen withdrawn by suitable tackle, and this boat is moved forward until it is brought close to the boat A, the telescope-joint at 24 25 sliding and closing up until the boats are close together. The material which passes through the discharge-pipe 15 and through this telescopic joint passes also through a discharge-pipe 30, which is sup-- ported upon the boat 16.

31 is a ball-j oint, the axis of which is in vertical line with the axis of the guide 18, so that in turning the boat A about the boat 16 when the latter is anchored this joint moves in unison with the guide and maintains communication between the pipes 15 and 30.

In order to allow the boat 16 to advance, as previously described, it is also necessary to provide for an extension of the pipe 30. This is effected by sliding one section into another and forming a telescopic joint upon the rear part of the boat 16, as shown at 32, the outer tube of this joint being connected with the extension of the discharge-pipe, which is carried rearwardly from the boat 16 to any re- IOO IIO

quired point of discharge, while the inner slidable section of the joint is connected with the part 30 and advanced with it whenthe boat 16 is advanced up to the boat A. When this advance of the boat 16 is completed, the spuds or anchors are again fixed to render the boat 16 immovable, and the spud or anchor temporarily used to hold the boat A is removed, so that the latter is in condition to again be advanced. These movements having been completed, the apparatus is then ready for a new cut, the telescope-joint 24 25 being closed, and the excavators can then be movedforward to commence a new cut. This construction enables me to first make a cut of the desired width by successive forward movements of the excavator, making independent cuts side by side and radially in line from the turnable guide on the fixed float and after such a cutis made to advance the whole apparatus into position to make a second cut without stopping to insert new lengths of conducting-pipe or otherwise providing for such advance.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a dredger, a means for making a succession of forward cuts centering from a fixed point at the rear of said dredge.

2. In a dredger, an excavator, suction and conducting pipes and a supporting float, a xed point behind the float around which the dredger swings, slidable joints in the conducting-pipes, and means for advancing the excavator and float in any direction with relation to said point while cutting.

3. In a dredger, an excavator, suction and conducting pipes and a support therefor, a fixed point in rear of said support around which the dredger swings, a slidably-extensible joint in the conductor, means by which the excavator and its support may be advanced to cut in different radial lines outwardly from the xed point, and means for retracting these parts after each cut.

4. In a dredger, an excavator, a float and a ladder projecting forward of the float and upon which the excavator is carried, a suction-pipe having its mouth opening contiguous to the excavator, a discharge-pipe connecting therewith and leading rearwardly toward a fixed point, a fixed structure at the rear of the float, a turnable guide mounted thereon, and means for moving the fioat and the excavator in a forward direction away from and in line with the said fixed point during the cutting operation.

5. In a dredger and excavator, a fioat, a ladder hinged to the front thereof upon which the excavator is adjustably carried, a suctionpipe carried upon the ladder having its mouth contiguous to the excavator, a discharge-pipe leading rearwardly across the float having a telescopic slidable section thereon, a turnable guide mounted upon a fixed support axially in rear of the float, a ball-and-socket joint in turnable guide mounted thereon, a slidable c beam fixed to the front float and movable through the turnable guides and `means whereby said beam and the front float and excavator are advanced with relation to the guide.

7. In a dredger, a float having a ladder hinged to the front, an excavator carried upon the front of the ladder, and means for removing the excavated material, a second float fixed in line at the rear of the first float, and having a turnable guide mounted thereon, abeam slidable through said guide having its front end fixed to the forward float, a cable or the like connecting with the rear end of said beam and a winding-drum upon`one of the fioats to coil said cable, whereby said beam and the forward fioat are advanced with relation to the fixed fioat and the guide 8. In a dredger, a float having a `ladder hinged to the front, an excavator carried upon the front of the ladder, and means for removing the excavated material,a second float fixed in line at the rear of the first float and having a turnable guide mounted thereon, a beam slidable through said guide having its front end fixed to the forward fioat, a winding-drum and cables connected withthe beam whereby the ladder, and the forward fioat may be advanced and retracted with relation to the fixed float.

9. In a dredger, a float having a ladder hinged to the front, an excavator carried upon the front of said ladder, suction and discharge pipes by which the excavated material is transferred rearwardly from the excavator and float, a second `float fixed at the rear of the first-named fioat having a turnable guide mounted thereon, a ball-and-socket joint in the discharge-pipe axially in line with said guide, and a beam or the like slidable through said guide having its forward end fixed to the excavator-heat, cables and winding-drums whereby the beam and excavator-float are moved forward and back with relation to the guide, a slidable telescopic joint in the discharge-pipe anterior to the telescopic joint, whereby said pipe is lengthened in unison with the forward movements of the excavator.

10. In a dredger, a float having a ladder hinged to the front, an excavator carried thereon, suction and discharge pipes by which the excavated material is conveyed rearwardly from the float, a second fioat having a turnable guide mounted thereon, a ball-and-socket j ointin the discharge-pipe axially in line with the guide, a telescopic section in the discharge-pipe anterior to said joint, cables and IOO Iif)

winding-drums whereby the excavator and its float are advanced or retracted with relation to the guide-carrying float, spuds or anchors by which said loat is fixed during the advance or retraction of the excavator, spuds or anchors by which the excavator-float may be anchored While the guide-oat is releasedl and moved up to the rear of the excavatorloat after a cut has been completed, and a guided telescopic section of the dischargepipe carried upon the' rear float, whereby the advance of said float is permitted without breaking the continuity of the pipe. I

11. In a dredger, a 'float having a ladder hinged to the front, one or more excavators mounted upon a shaft journaled transversely across the front of the ladder, means for moving the float and the excavator in a forward direction away from and in line with a fixed point during the cutting operation, and toward said point after the completion of each cut, and a suction-pipe carried upon the ladder and having a mouth made divergent horizontally and coincident with and contiguous to the excavators.

12. In a dredger, a iioat having a ladder hinged to the front, one or more excavators mounted upon a shaft journaled transversely across the front of the ladder, mechanism by which power is transmitted l to rotate said shaft and excavators, and means for advancing the Iioat and excavators in the longitudinal line of the dredge so as to make a direct forward cut at each advance, a suction-pipe carried upon the ladder having divergent branches at the lower end, said branches having mouths in the form of flattened cones or hoppers divergent from the branches toward the front and contiguous to the excavator.

In witness whereof I have hereunto set my hand.

RAYMOND A. PERRYZ Vitnes'ses:

S. H. NoURsn, CHAs. E. TowNsEND.

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