US484763A - bowers - Google Patents

Description

(No Model.) .3 Sheets-Sheet- 1.

A. B. BOWE'RS.

APPARATUS P( )R DREDGING AND TIRANSPORTING SPOIL- No. 484.763. ga t gnted Oiot. 18, 1892.

(No Model) 3 Sheets-Sheet 2. r A. B. BOWERS. I

APPARATUS FOR BRIDGING AND TRANSPORTIN-G- SPOILI 'Patenpdflct. 18, 1892.

Sheefs-Shet A B. BOWERS. APPARATUS FOR DREDG (N0 Model.)

ING AND TRANS POBTING SPOIL.

' Patented 0 18, 1892.

ivrrnb S'raras ATENT reins,

APPARATUS FOR DREfififlNG AND TRAN$PORTlNG SPOIL.

SPECIFICATION forming part of Letters Patent No. 484,763, dated October 18, 1892.

Original application filed December 9, 187B. Renewed April 16, 1879. Divided and application filed April 29, 1885, Serial No. 163,888. Again divided and this application filed January 5, 1836- Serial No. 187,638. (No model) To @ZZ whom, it may col-warn:

Be itknown that I, ALPHONZO l). Bownns,

civil engineer, of San Francisco, California, now residing in Washington, District of Columbia-,have invented an lmprovementin Apparatus for Dredging and 'lransporting Spoil, for which application for Letters Patent, filed December 9,1S76,was renewed April 16, 1879, and is still pending, in part, before the- Patent ()tfice, Letters Patent Nos. 318,859 and 318,860, for two divisions of this application having been issued to me May 26, 1885. A third division embracing all of the'aloresaid original not included in the Letters Patent above specified was filed April 29, i885, and bears the Serial. No. 163,888. This application is a fourth division of the aforesaid original or a first division of said third division. It.- also consists in part of a first division of an application filedJune 30,1853, and having the Scg'ial No. 99,678.

It consists, mainly, of a peculiar rotary excavator that delivers its spoil inward through itself to a suction-pipe; an improved device for mounting and actuating the excavator; a suction-pipe, ladder, and excavator connected with the boat by a universal joint and supported by a crane or by an arm, spar, jib, beam, or boom having a lateral swing, whereby said pipe, excavator, and support are enabled to swing laterally, either with or independently of the hull, and make a wide or narrow swing at the will of the operator; a vertical feedingor fleeting anchoralso mounted on a swinging derrick or frame and arranged to vary the. amount of forward feed in varying conditions of work; a device for relieving the flexible sections of the pipes from the strain of holding the rigid sections in place, with details of construction, for all of which this and the accompanying drawings are a specification.

Figure 1 is a vertical and longitudinal section of a dredge-boat and a side view of some of myimprovements. The. ladder on which the'suction-pipe is usually mounted is omit- I ted in this figure to-show more clearly the arrangement for actuating 'the excavator and because under some circumstances it is not necessary. Fig. 2 shows the swinging crane- .post and. the hydraulic hoist that raises, lowers, and holds the excavator. Fig. 3 is a plan of the hull and of most of the improvements claimed in this application. Fig. 4 shows in black a crosssectiou of the bell-mouth suctionpipe, tubular bearing of the excavator-shaft, and the ribs that support this bearing. It .also shows the inner end of the excavator and anti-friction rollers sometimes used to carry this end. Fig. 5 shows details of construction and mode of mounting and actuating the excavator. Fig. (3 shows the collar-and-groove moved to show details of construction. Fig. '7 is a side, and Fig. 8 a top, view of thepump and a portion of two suction-pipes, showing how by means of suitable trussing and bracing these pipes may be made to constitute one form of the ladder usually, though not always, employed to support the excavatingdevice. These pipes, as shown in Figs. 7 and 8, swing on hollow trunnions provided with glands, through which passes the shaft of the pump, the pipes also passing through glands to thesuction of said pump. This arrangement forms a strong ladder, (and by the term laddcr in both description and claims I mean a structure consisting of at least two longitudinal members united by cross bars or beams and serving a support to the suction-pipe or to the excavator, or to both.) Either pipe may be constructed to carry water and spoil, or both may be so constructed, though a single conduit with any suitable form of t-russing and bracing is preferable, (for one form of which see ladder I, yoke T, and pipe 0, Fig. 3, which shows, also, the furthcr modification of a lateral swing independent of the boat.)

A is a floating vessel that carries the engines, boilers, and excavating apparatus.

B is a pump that draws the spoil upthe suction-pipe and sends it through the dischargepipe to a place of delivery. It is placed beatmospheric pressure, supplemented, if desired, by the weight of water above the sud tion-passages, and also to enable those passages to be submerged to prevent leakage of air in case said passages should prove to be not wholly air-tight.

C, Figs. 1 and 3,1is asuction-pipe connected low the water-line in order to secure the full 9 tlnrust-bearing G of shaft F, the cap being re- D, leaving the ladder and pipe free to move;

g in their proper positions.

ing through the smooth easy curves-and uniinboard section of pipe. ,35

(Land 0'. They may be made of leather with the pump B. It is provided near its outer end with seats, on which are mounted the motor II, that actuates the excavator, and the collar-and-groove thrust-hearing G; also, a short detachable mouthpiece curved, as shown, Fig. 5, to allow the excavator-shaft to pass through a long tubular bearing to the outside of the pipe and to the motor H. The mouth of this curved section is enlarged to compensate for the space occupied by. the tubularbearingand itssupporting'ribs. The swingingoutersection ofthis pipe is connected with the boat and inboard section by a strong universal joint D, hereinafter more f ully. described. This pipe is usually mounted on a ladder I and yoke J, Fig. 3, though the ladder may be constructed to perform the office of both ladder and yoke. In someinstances I prefer to make them separate and detachable, so that the boat may-be lightened by the removal of the ladder when making a shallow cut in still water and loose material. Both ladder and yoke swing on strong trnnnions K K orequivalent joints. These trunnions project from opposite sides of the swinging derrick-post, and with the ladder or yoke and swinging post form an open universal joint in an ydirection, and thusaccommodate them-- selves to the movements of the hull when working in rough water. Through this open universal joint passes a section of flexible suction-hose, uniting the swinging with the.

This flexible section is of suflicient length to make easy curvesin' accommodating itself to the movements of the pipe and crane and is used to avoid the abrupt angles and irregular waterway .of a hollow ball-and-socket or other hinged joint.

C is a discharge-pipe. D D are open universal joints securely mounted on opposite ends of the boat. On these joints are mounted the swinging sec-' tions of the suction and discharge pipes. These joints relieve the flexible sections D of these conduits from the strain of holding the inner ends of the rigid swinging sections D D are flexible sections of the conduits rubber, canvas, or othersuitable material, the" one forming a portion of the suction-pipe be ing constructed to resist external (and theone on the discharge-pipe internal) pressure. The central portions of these flexible sections should be coincident with the axesof the joints D D to give equal facility of curvature in all directions. The friction of mud and water passform water-way of a flexible section is much less than in the bsupt angles and-irregular water-ways of hollow ball-and-socket or other hinged joints, for which reason flexible sections are much preferable, though I confine myself to no particular form of universal joint. E is any device working with a side feed across the cut and delivering'its spoil inward. heat, with which it is through itself to a suction-pipe. It is not necessarily rotative, though the rotary is thought to be its best form.

Specific claims for non-rotative devices are made in other applications and other divisions of the application filed June 30, 1883, now pending. It is here shown in one of its many rotary forms, and it, with the curved mouthpiece of the suction-pipe, the motor H, and ladder, may be omitted in loose semiliquid material at a great reduction in the cost of the machine, though at the expense of much of its efficiency.

Either end or hot ends of the excavator here shown may be dished, substantially as represented in Fig. 5, to guide the spoil toward the mouth of the stiction-pipe and contract the water-way through the excavator to prevent the admission f too much water.

In the divisions offizhe application embraced in Letters Patent Nos. 318,859 and 318,860 already issued, the/excavator is shown with a conical hub fitting i'ntoa hollow conical casing in the outer end of a hollow inner chamber, around which the excavator revolves. In this division said inner chamber is omitted. The

excavatoris of a different form. The hub i abuts against the bearing'j and is provided with no casing. The excavator is mounted on-a shaft F, Fig. 5, passing through a tubular bearing in the mouth of the suction-pipe,'-t and its Inner end runs on antifriction-rollers a, that travel on and around said pipe. I

F is the'driving-shaft of the excavator. Its diameter may be slightly reduced at the opening 1) to allow a thin film of water to be forced or drawn in through this opening to lubricate the bearing, but more particularly to keep out grit'by the passage of a constant stream of water, [as the construction of the excavator is such as continuously to throw the spoil against said bearing. Instead of weakening the shaft by cutting it down, it may be enlarged by shrinking on a thin sleeve of brass or bell-metal to form the hearing, or the bearing-tube may be slightly enlarged at the aperture b to permit the water to pass around the shaft and have free access to the entire hear ing. With no special provision other than the aperture 12 the bearing might be sufllciently lubricated and the grit probably kept out by forcing in water from a pump on the boat. The shaft may be provided with a gland c as a further precaution against the admission of grit.

Gis a collar-and-groove thrust-bearing to preventlongitudinal movement'of'the shaft F.

His a hydraulic motor acting directly on the excavator-shaft. It may be placed near the excavator to avoid friction in the several bearings of a long shaft resulting from any sagging of the ladder'or pipe on which these bearings must be placed and to allow the use of a lighter ladder or other rigid connection than would otherwise be necessary. This,

motor isactuated' by a force-pump on the connected by a pipe or plicity of arrangement, the ease and certainty with which its speed can be regulated to suit different conditions of work, reduced weight, and diminished liability of getting out of repair.

I is a rigid connection between the outer end of the suction-pipe or other device on which the excavator is mounted and a boat swinging on a vertical anchor or other contained center of oscillation, or between said outer end and a sw nging or turning cranepost, Figs. 1, 2, and 3, or other swinging or turning device to which I is hinged. It is' represented in the drawings as making, in connection with the swinging device, a universal-joint connection with the hull. .In Fig. il, with tie-rods T in place, andin Figs. 7 and 8 it swings independently of the boat onlyin a vertical plane. It may be aladder consisting of sides and cross-pieces with or without braces, or it may be any suitable tr ussed framesork, a spar, beam, or boom, or ven the suction-pipe itself, and yoke J, as in Fig. 1, if said pipe and -yoke be made strong enough for this purpose. It may be hinged in any suitable manner to a boatswinging on a contained center of oscillation or toany swaying device, by means of which it becomes capable of being made to swing in ver-.

the vertical, the other the lateral swing.

The general conception of thedeviceI is a rigid connection of the outer end of the suction-pipe with the boat, the crane-post, or other swinging device. A specific form of it is theladder above described.

' which they are hinged.

J is a fork or yoke connecting the rigid swinging section of'the suction-pipe or the ladder, or both, with the trunnions K K, to This fork should-be long enough to allow the center of the flexible section to be in-line with the trunnions K K.

L gisa swinging crane-post or other swinging device that, in connection with yoke J,

discharge-pipe.

forms a universal or double joint or joints, by means of which the suction-pipe is securely connected with the hull and made capable of being swung in vertical and lateral planes in front of and independent of any swing of the boat.

L is an arm, spar, jib, beam, or boom that maybe mounted in any manner capable of supporting the excavator and allowing it to have a lateral swing. It is shown in the drawings as hinged to the crane-post to allow a vertical adjustment and to swing laterally V with said post.

L is a swinging derrick or frame with hollow post, through which passes the pivotal anchor V, which, being carried by the boat, may be termed acontained pivot or center of oscillation, on which the dredger swings when cutting a wide channel. Through a traveler on this derrick passes the fleeting or feeding anchor V. On the derrick-post, Fig. 1, is mounted the Windlass f, around which wind the lines g g for moving the dredge forward after dropping V and raising the other vertical anchor. By turning the Windlass the dredge may be fed forward until V occupies'in relation to the derrick the position indicated by the outlines W, or it may be fed forward any fractional part of this distance. The anchor V is'then dropped into the mud and V (indicated by the outlines V is raised to be out of the way of the The Windlass f is then released from its ratchet and V fallsback to its former position near the hollow derricle post. I do not confine myself to this form of constructiomas any convenient methods of raising the anchors and of moving the traveler and fleeting or feeding anchor may be used instead of those here shown and described.

M Mare trunnions on opposite sides of the crane-post, on which the arm -L may be mounted.

N'is a hydraulic hoist with which (and the cable h) the ladder, suction-pipe, and excavator are raised, lowered, and held in working position. I

O O are anchors for holding the bull in a stationary position -when cutting a narrow channel by swinging the excavator'laterally in front of the boat.

0' O are hollow cylinders passing through the hull for the reception of the anchors O.

' 0 0 are masts provided with blocks, tackle, and Windlass 0 for raising the anchors 0V V. P Piare winding devices for swinging the excavator, suction-pipe, and crane when mak- -v i ces-on the hi1 ll to blocks ee, attached to the arm L". ladder I, or suction-pipe, and thence itcrt-he-anchors R R1. to which they may poseladder I. orother equivalent.mnstraction,

cured .gor. tney. may pass through 'blocksattached to these anchors and back to the suc= tion-pipe' or-ladder, or rigid connection, substantially as shown.

R R are preferably of the type termed mushroom-anchors, though any anchors capable of holding their position will answer.

S S'shows the are through which the excavator swings on the crane, and s s a portion of the arc traversed whenv swinging with the hull on the anchor or contained pivot V.

T T are detachable tie rods or guys to prevent the excavator from swinging independently of the hull when cutting a wide channel by swinging on the anchor V.

U is a device for indicating at the arm L the depth at which the work is progressing.

Z Z are valves for excluding water or mud when the'pump B is opened for examination or repairs.

This machine can be successfully operated only when the excavator is below the surface of the water. In some cases the material to be moved rises above said surface and undercutting is necessary. In some-such cases, if the machine should be fed forward to undercut the full length of the excavator, an insufficient supply of water would enter the suction-pipe, which would consequently become choked. In such cases the machine may be fed'forward for the first swing in each series (1, 2 3, and so on, Fig. 1) only one-half the length of the excavator, the remaining half being cut by again feeding forward and making a second swing before' lowering the excavator. In very hard and also in very rooty or fibrous material the undercut portion may not always break oif and fall as the excavator passes from under it. For such cases a double-edged bracket m or other suitable support projects from near the lower end of the suction-pipe to a point over the outer end of the excavator; To the outer end of this support is hinged the bar Z. The lower part of this bar is provided with a cutting-edge o each side, that, swinging in either direction,

severs from the bank the undercut material left by the excavator, causing it to fall partly on and partly behind saizl excavator. upper end of the barl slides-freely in a slot in the outer end of the boom L as the excavator is raised and lowered. This upper end may be provided with a figured scale that- 5 shows at the boom or elsewhere, as desired,

the depth at which the work is progressing,

This scale also shows the operator when the cutter has been lowered the proper depth for each successive swing, as well as when the reqnireddepth of out has been attained.

This application, consisting of divisions of two other applications, as hereinbefore stated, (to wit, a division of the third division of the application filed December 9, 1876, and a division of the application filed J one 30, 1883,)

shows features described and claimed. in L t;

' ters Patent Nos. 318,859 and 318,860 for ot er divisions of the original application, and reference is here made to these Letters Patent The for a further exposition of my improvements and-claims.

In this division of the aforesaid applications Iclaim- I 1. A hollow rotary excavator with inward delivery, in combination with a suction-pipe, said'excavator being provided with a'dished end constructed to guide the spoil toward the mouth of said pipe.

2. A hollow rotary excavator with inward delivery and uncased hub, in combination with a suction-pipe and-a shaft liav-ing a bearing close to said hub.

3. A rotary excavator nioilnted on a shaft provided with a collar and grooved thrustbearing, incoinbination with a suction-pipe. 4.; A rotary excavator mounted on a nonrotative suction-pipe and providcd'with antifriction-rollerbearings, said bearings being constructed substantially as shown and described.

5. A hollow rotary excavator with inward delivery through itself to a suction-pipe, said excavator being mountedon a shaft provided with a device for washing out grit from the bearing of said shaft. 1

6. In coinbin'ation,'a hollow rotary excavator with inward delivery; through itself,

mounted on a shaft provide with a device for excluding grit from the caring of said shaft, and a suction-pipe;

7. A rotaryexcavator mounted on a shaft having'a hearing within atube passing from the hub of said excavator to a point outside of the suction-pipe and-in combination with said pipe.

8. A rotary excavator mounted on a shaft provided with a long tubular bearing, said shaft havinga reduced portion within said tube and a pipe for introducing water to said reduced portion.

9. In combination, a suction-pipe,a hollow rotary excavator'with inward delivery through itself to said pipe and mounted on a shaft driven by a motor acting directly on said shaft. I

10. A hollow rotary excavator'with inward delivery through itself, in combination with asuction-pipe and a motor mounted" on said pipe.

11. A hollow rotary excavator with inward delivery through itself, in combination with a suction-pipe mounted on the yoke J or equivalent joints. 1

12. A rotary excavator with inward delivery through itself, in combination with a suctiontion-pipe and the ladder constructed and arranged to swing in vertical and lateral planes, as described. x

13. In combination, the ladder, as described, suction-pipe, and a hollowexcavator that delivers its spoilinwardly through itself to. and

rotates independently of said pipe.

14. A rotary excavator with inward delivery through itself, in combination with a suctionpipe. 4 y

p 15. A rotary excavator with inward delivery through itsside and arranged to work with a side feed, in combination with .a suction-pipe and the rigid connection I, hinged to swing in a vertical plane;

16.. A rotary excavator with inward delivery through itself, in combination withasuctionplpe mounted on a device that swings in a vertical plane, said pipe being provided with a flexible 1 section I) to accommodate said swinging.

17. A hollow rotary excavator with inward delivery through itself, in combination with a non-rotating suction-pipe mounted to swing independently of the boat in a vertical plane and in planes perpendicular to said vertical plane, with means for making said swings.

18. A suction-pipe mounted to swing on trunnions or equivalent joints and provided with a flexible section I) to accommodate said swing.

19. In combination, a dredge-boat, pump, and a suction-pipe having an outer-swinglug section mounted on auniversal joint and a flegrible section to accommodate said joint.

20. In eombination,a dredge-boat, exhausting apparatus, and a swinging section of suction-pipe connected with said apparatus by a flexible section D, provided with a joint constructed and arranged to hold (and to relieve said flexible section from the strain of holding) the swinging section in proper position.

21. In combination, adredge-boat, exhausting apparatus, and a swinging section of suction -pipe'connected with said apparatus by a flexible section and provided with a universal oint constructedand arranged to relieve said flexible section from the strain of holding the swinging section.

22. In combination, a dredge-boat, pump, and a discharge-pipe having outside of said boat a section of said pipe mounted on a universal joint .and provided with a flexible section D to accommodate said joint.

23. In combination, adredge-boat, non-rotating suction-pipe, and a hollow rotary excavating device with inward delivery through itseltvto said pipe, said excavator being arranged to swing in a lateral plane in front of and independently of a swing of the boat, with means for making said swing.

24. In combination, a dredge-boat, the ladder described, a non-rotating suction pipe, and hollow rotary excavating implement that delivers its spoil inward through itself to said pipe.

25. In combination, a ladder, suction-pipe, and hollow rotary excavator with inward delivery through itself to said pipe.

c 25. In combination, a suction-pipe, ladder, and hollow rotary excavator with inward dclivery through itself to said pipe, said exca with the ladder described, suction-pipe, and an excavating implement constructed to swing in vertical and lateral planes independently of said boat, with means for maki ng said swing.

29. In combinal ion, a dredge-boat, a ladder mounted to swing vertically and laterally on a crane, a suction-pipe supported by said ladder, an excavating implement connected by said pipe with a pump on the boat, said pipe being provided with a flexible section to accommodate the movements of the ladder and crane, means for raising and lowering the ladder, and means for swinging it and the crane.

30. In combination, a dredge-boat, a ladder mounted to swing vertically and laterally on a crane, a suction-pipe supported by said ladder, an excavator that delivers its spoil inward through itself to said pipe, by which it is connected with a pump on the boat, said pipe being provided with a flexible section to accommodate itself to the movements of the ladder and crane.

'31. In combination, adredge-boat, a ladder mounted to swing vertically on a crane, a suction-pipe supported by said ladder and connecting a rotary excavator with a pump on the boat, said pipe being provided with a flexible connection to accommodate the movements of the ladder and crane.

32. A dredge-boat, a swinging crane connected thereto, a jointed suction-pipe mounted to swing with saidcrane and carrying an excavator, a pump connected to said suctionpipe, and means for raising, lowering, and swinging said suction-pipe, all combined substantially as described.

In combination, a dredgeboat, a suction-pipe mountedtoswing vert lly and laterally on a swinging crane, a pump on the boat,

connected with the suction-pipe, said pipe cal and lateral movements, and means for making these movements.

35. In combination, a dredge-boat, arotary excavator mounted on a suction-pipe constructed to swing in vertical and lateral planes on a stationary universal joint, a laterallyswinging device for supporting the outer end i of said pipe, and means for swinging the pipe and its swinging support.

36. In combination, a dredge-boat, a suction-pipe mounted to swing vertically and laterally on. a universal joint, said pipe being provided with a flexible section D to accommodate these movements, a rotary excavator outer end of. thissupport, and means for lat \erally' swinging the same.

connected by said pipe with a pump on the boat, a motor that actuates said excavator and swings with it and the pipe, and means for laterally swinging the same.

3,7. In combination, a dredge-boat-, a suction-pipe mounted to swing vertically and laterally on a universal joint, said pipe being provided with a flexible section B to accommodate these movements,a hollow rotary excavator with inward delivery through itself,

connected bysaid pipe with a pump on the boat, a motor for actuating said excavator,

and means for giving to said ,pipe and excavator said vertical and'lateral swings. 38. In combination, a-dredge-boat, a suc tion-pipe arranged to swing vertically and laterally in front and independently of the boat, detachable tie-rods arranged tohold said pipe from swinging laterally independently of said boat,and means forlaterally swinging thepipe and boat together. r 39. In combination, a dredge-boat, a suction-pipe and rotary excavator mounted to swing vertically and laterally in frontof said -boat, detachable ties to prevent said pipe and ing-arm L, a suction-pipe, a rotary. excavator mounted on the outer end of a rigid support: 5

excavator from swinging laterally independently of the boat, and means for swinging the whole together.

40. In combination, a dredge-boat, an excavating device mounted to'swi'ng in front of the boat, means for preventing said device from swinging later'ally independently of said boat, and means for swinging said device with the-boat, saidmeans being also adapted at gill to swing the pipe independently of the oat.

41. In 'combinat ion, a dredge-boat, excavating device, and a cable passing from a winding device toa block or sheavenear the outer end of the apparatus that supports said excavating device and thence to an anchor in position to givev a side sw g as the cable is drawn inboard. i

42. In combination, a dredge-boat, excavating device, and a cable passing froin a winding device to a block or sheave near the excavator or ,point of resistance, thence to an anchored block in position to give a side swing as thecable is drawn inboard, and'fr'omsaid anchored block to near the end of "the appar us on which said excavating device is ounted, where the end of said cable is made the outerend of a rigid support I, hinged'to' a-sw-inging device L to swing in vertical and lateral planes, means for. raising, lowering, and holding the outer end of this support, and means for laterally swinging the same.

44. In combination, a dredge-boat, a swinghinged at its inner end to the swingingrdevice L to swing in vertical and lateral planes, means for raising,'lowering, and holding the 45. In combination, adredge-boat, a rotary excavating device, and non-rotating suctionpipe, said excavator being provided with a rigid support, said support being connected.

with the boat by auniversal joint, and means 'for raising, lowering, and laterally swinging boat by a universal joint,and means for rais-f ing, lowering, holding,an'd swinging the outerend of said pipe.

48. In combination, a dredge-boat having a contained pivot or center of oscillation, a crane, a suction-pipe mounted on said crane andhaving a vertical and lateral, swing, a pump on the boat connected said pipe, this pipe being provided with a flexible section that yields to and permits said vertical and lateral movements.

49. In combination, a dredge-boat that carriesa pivot or center of oscillation, a ladder that swings in a vertical plane 'and supports an excavating device, cables connected with said ladder, and means, in connection withsaid cables, for laterally swinging said boat on said pivot.

50. In combination, adredge-bpat that carries a pivot or center of oscillation, a ladder that swings ina vertical plane and supports an excavating'device that works with a side feed, cables connected with said ladder, and means, in connection with said cables, for continuously swinging said boat from side .to side on said pivot while *said excavator is at work.

51. In combination, a dredge-boat, aswing- I IO ing frame, and a fleeting spud carried by said frame, for feeding the boat forward as the work progresses.

52. In combination,a dredge-boat,aswinging derrick provided with a vertical anchor, means for raising, lowering, and holding said anchor, and means for moving italong the .arm of said derrick.

53. In combination, a .dredge-hoat, a derrick having a hollow post, through which passes a vertical anchor, and means for rais- ,ihg, lowering, and holding said anchor. 54. In combination, a suction-pipe mounted to-sw'ing ina-vertical plane, a rotary excavator-that delivers its spoil inward through itself to said pipe, and a motor that actuates said excavator and swingswith it and the PIPE.

55.. In combinatiomasuction-pipe mounted to permit its outer end to swing in a'vertical plane and in planes perpendicular to said vertical plane, said pipe being provided with a flexible section D to accommodate these movements, a rotary excavator connected by said pipe with a pump on the boat, a motor which act-uates said excavator, and means for vertically and laterally swinging the same.

d6. In combination, asuction-pipe which swings in a vertical plane, a rotary excavator that delivers inward through itself to said pipe, and a motor that actuates the excavator and swings therewith.

- 57. In combination,asuctionspipe mounted on a dredge-boat to swing in a vertical plane,

vsaid boathaving a contained center of oscillation, means for swinging said boat on said center, a rotary excavator in connection with said pipe, and a motor that actuates said ex- ;cavator and swings with it and the'pipe.

- .58. In combination, an exhausting apparatn's, a suction-pipe connected with this apparatus and mounted to swing with the device L, a rotary excavator in connection with said pipe,;and means for actuating said excasuction-pipe provided with a rotary excavator that delivers its spoil inward through itself to said pipe, means for raising, lowering, and

holding the excavator, means for rotating it,

and ineans for swinging it and the crane.

62. In combination, a dredge-boat, pump, suction-pipe, hollow rotary excavator with inward delivery through itself,- and a motor for actuating the excavator independently of the pump,

63 A- swinging frame for dredging purposes, consisting of an upright open-centered post, an arm borne by said post, a frame or ladder pivoted to the post to swing in a verticalarc or plane, tackle connected to said arm to raise,1ower, and hold the-outer end of said ladder, and bearings constructed to hold the post in its upright position and permit the frame to swing in a lateral are or plane.

. 64. In combination, adredge-boat,a swinging crane with hinged support carried thereby, a suctionpipe connecting apump on the boat with the excavator at the end of the laddate the vertical movement of the ladder and.

the lateral movement of the cranel 65; In combination, a dredge-boat, a swinging crane having the ladder, frame,or carrier of the excavating or dredging implement mounted thereon, a pipe having a universal joint in its length connecting the excavator withapparatus on the boat, so as to have movement in a vertical are on the hinge ofthe carrier and in a lateral are from side to side by the swing of the crane, winding-drum, and tackle conncctedwith said drum and supporting the hinged carrier from the boom of the crane. 1

66. In combination, adredge-boat, a swinging frame or ladder having adjustment in both vertical and lateral planes, a rotary excavator carried thereon, a suction-pipe ex-- tending from a pump on the dredge to the excavator, and provided with a joint or flexible section which permits said pipe to accommodate itself to the movements of the ladder or frame and to follow the same in the vertical and lateral planes, and a drivingshaft connected with actuating mechanism on the dredge, permitting movement and rotation of the excavator in unison with the movements of the ladder or frame.

67. In combination, an excavating implement, a swinging frame or excavator-carrier having adjustment in a vertical plane and a swinging movement in lateral planes, and a with a side feed, a suction-pipe, and means to sever from the bank the material undercut .by said excavator 'as -it swings from side to side.

IIO

70. Iii-combination, an excavator, snctionpipe, and the cutting-bar Z, substantially as and for the purpose specified.

71. In combination, an excavator, suctionpipe, and -the cutting bar and scale Z,

A. B. BOl'JERS.

\Vitnesses:

O. N. IML'AR, D. P. Cow

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