US1424452A - Self-bailing scow - Google Patents

Description

H. T. DUNBAR.

SELF BAILING SCOW.

APPLICATION FILED MAY 14, 1921.

1,424,452, Patented Aug. 1, 1922.

3 SHEETS--SHEET I.

H. T. DUNBAR.

SELF BAlLlNG SCOW.

APPLICATION man MAY 14, 1921.

1,424,452. Patented Aug. 1,1922.

3 SHEETS-SHEET 2.

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H. T. DUNBAR.

SELF BAILING SCOW.

APPLICATION FILED MAYH, 1921.

Patented Aug. 1, 1922,

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HARRIS T. DU NBARpOF BUFFALO, NEW YORK.

SELE-BAILING scow.

To all whom it may concern Be it known that I, HARRIs T. DUNBAm a citizen ot the United States. residing Buffalo inthe county of Erie and State oi New York, have invented new and useful improvements in Self-Bailing Scows, oi which the following is a specification.

This invention relates to means for bailing a scow or other water craft by utilizing the weight of the load which is deposited upon the scow and removed theret'rom as the source of power for effecting the discharge of the water from the hull.

It is the object of this invention to accomplish this purpose by means which are simple in construction, eliicient in operation, and require a minimum of attention.

In the accompanying drawings:

Figure 1 avertical longitudinal section of a scow embodying my invention, taken on line 1-1. Fig. 2. Figure 2 is a top plan view thereof partly in section. Figures 3, l and 5 are transverse sections talren on the correspondingly-numbered lines in Fig. 1. Figures 6, 7 and 8 are diagrammatic views of the scow showing different positions which the same occupies during the operation of self-bailing the same.

Similar characters of reference indicate corresponding parts throughout the several.

views.

The hullo'l the scow is hollow and provided with a. flat bottom 10, a fiat deck 11 and upright side walls connecting the edges of the bottom and deck and having the main central parts 12 thereof arranged lengthwise while the opposite end portions 13 there'- of are inclined toward the longitudinal center of the hull, so that the opposite ends of the latter are tapered or pointed forwardly, but present vertical edges 1% at the extreme ends of the hull.

This hull may be provided with one or more wells extending from the deck to the bottom thereof two of such wells being shown, for example, in the drawings and each well being designed to form part of a receptacle for carrying the material which is to be transported by the scow. Each of these wells isprovided with two longitudinal side walls 15 which are arranged parallel with each other and two transverse walls 16 and 17 which diverge downwardly from the top of the deck of the hull, toward the bottom of the same, the transverse wall 16 being preferably curved while the other transverse wall 1? Specification Letters Patent. Patented Aug. 1, 1922.

1921. Serial No. 469,431.

is preferably straight, as shown in Fig. 1. When two wells are employed in the hull the straight inclined transverse walls of both wells preferably are arranged on the inner sides of the wells or away from the ends oi the hull and are joined at their upper ends so as to form an. apex 18 whereby any material dropped upon the central part of the scow will be divided by this apex and caused to flow downwardly partly into each one of the wells.

In the case-of two wells being arranged lengthwise next to each other in the hull the curved transverse walls 16 are arranged next to the ends of the hull.

The lower or outlet end of each well is con trolled by a door which is moved into a position across this outlet so as to form with the well a pocket or receptacle which receives the load to be transported and this door is movable out of a position across this outlet, so as to permit the load to be discharged from this pocket when the material has been transported to the place where the same is to be discharged. In the preferred construction of this door the same is made hollow and comprises end heads 190, an upper fiat wall 19 and a lower curved wall 20 which connects at its several edges with the corre-.

sponding edges of the front wall 19 and heads 190 and forms therewith a buoyant body, the upwardly-swinging movement of which is assisted by the water when the door is free. The bottom 20 of each door is curved about horizontal axis which is transverse to the bottom. and one end of the same is preferably arranged comparatively close to the straight inclined wall 17 of the well so as to form a practically tight joint therewith, while its opposite end may be spaced apart or titted comparatively loose relative to the curved transverse wall 16, as shown in Fig. 1.

Various means may be employed for supporting each'door on the hull, those shown in the drawings comprising two arms or hangers 21 which project upwardly from opposite longitudinal ends thereof and provided at their upper ends with laterally projecting trunnions 232 which are arranged horizontally or transversely and journaled in suitable bearings 23 on the adjacent parts of the deck 01 the hull. The curved lower wall 20 01' each door is .:oncentricwith the axis of the trunnions and the curved transverse wall 16 of the respective well is each of the doors is moved. by gravr jacent straight inclined wall, 1'

pivotal connections between theinner tr,

also preferably concentric with the trunnions, as shown in Fig. 1', which cai'ises the.

lower wall of the door to always travel itairly close to the straight transverse wall 17 but remain clear of or spaced apart from the curved wall 16.

The upward movement oi: each, door. on that side oi the well having the curved transverse wall: 17 is limited by. a stop device while the s cowisbeingloaded and while the loadis beingtransported, but this stop deyice may be shifted to. permit the door to continue its upward movement onthatside of the well having the curved i wall 16 when it is desired to uncoveror openthe lower endof the well and permit theload to. be discharged,therefron'ibygravity. ln itspi'ele -red form this stop device comprises an outer or rear toggle link A l which is pivoted on the deck of the hulladj acent to t-he central, part. of the curved transversewall 1.6 tl161f60f,- so that the same iscapable ofswingzy ing in a vertical plane, and: an. outer vor itront toggle link 25 whiclrispivotally connected with the inner linlefl l so as to be capable: ottswinging in avertical plane rel.-

atively thereto. When the scow is '"nptied,

a position in which itcloses the, loweia or outlet QDChOiE its well in which positionthe upper; wall 19 of the door isliori/ioittal. or substantially eo as shown, by 'lull lines in Fig. 1-,, hen loading th'isscow thetn'iaterial is.droppedjn-to the wells so that; the greater part of the same rests upon; the horizontal wall l9: of, each: door and the adoil the -respoctive well, while.- amzoinparatively small part oil. the: load is arrange-don that pit of the lower wall-[1.9 adj tto the curved wall 16-; as shown bydotted 'nesin Fi 1, thereby causing the weight-oi the inati in each well to turn eachi dooriso tha end thereof next to the inclined wouldbe lowest and-that end-n curved wall 16 will be elevaterh the .ino'vement in this direction being, however. arrested before the wellis uncovered at its lower end by engagement Oil the elerateiil end otthe door with the front endot the is outer toggle link "which at this. time shiltedflso as to project into the. path- Oi door. The two toggle links are held at tnis time in a position in which they are practically 1 'd by engagement of the inner to lgle link with the adjacent part ol the cnrwd transverse wall !6 of the respective well. so

that the point o't engagement between the door, and the outes to 'le llllli. and the rat's link and the hull and outer toggle link a; on a dead center and remain rigid under the thrust exerted against the same by the door which tends'to' move forwardly at the respective end by the prepoiiiderating press'n'e inseam mediately turned into an opened position so. that the same uncovers the lower or outlet end of the well, this opening movement of the door being automatic and effected by the preponderating Weight of the material resting upon the upper floor 19 thereof between the axis of the door and the straight trans.- verse wall 1'? of the Well, which movement is aided by the buoyancy of the door, due to its. hollow construction. As the door rises on that side neXt to the curved Wall 16, the upper wall 19 of theldoor assumes a gradually increasing inclination while at the same time the material slides down the inclined transverse wall 17, whereby the entireload is discharged. from. the wellv through the lower end or outlet thereof. Astsoonwas the material has slid off from the door the same again returns'by'gravity into its lowerposilllOlldl'l which it extends across the outleto't" the well, and then the operator again shifts the locking device. from the top oi" j the deck into a position in which. it stands in the path otth-at edge of the door next to the curved wall 16 ready to arrest the upwardmovement thereof and keep. the door in its. closed position, when-a load of material is deposited in the well. i

In order to permit the load'kto discharge promptly :t'romthe well and the. door to. clear itselt effectively of the material deposited uponthe upper wall 19 thereof, the transverse edge-26 of the well at the lower end of the straight wall. 17 is-arranged farther from a vertical plane extendingthrouglr thetaxis of the door than the transverse. edge, 2?? of the well at the lower end of the curved wall 16, as shown in Fig. 1. As soon as thatrend .ol the floornext tothe straight wall-17 passes beyond the lower edge 26 thereofthe-material immediately begins todischarge-tromthe llJS the edge Qty/ill be innnediately fully liberated and permitted. to drop out" of :tllGzVGll without any restriction. 1

In order-to increase the loading capacity of the scowand toxprotect t the bearings on the deck which support. the pivots oivthe doors, two coamings 29 arearranged lengthr wise upon the deck along opposite sides of the wells, so as to enclose the inner parts of the bearings of the doors, thereby preventing the bucket of the dredging apparatus, as the same swings over the scow, from injuring these hearings. As shown in the drawings, the several walls or parts of the hull forming the shell of the same and the main parts of the doors are constructed of sheet metal, but it is to be understood that these parts may be constructed of other materials, if desired.

The means for utilizing the weight of the material which is loaded into the scow to furnish the power for obtaining practically a self-bailing effect are constructed as follows: r

30, 31 represent two upright bulkheads which extend transversely of the hollow interior of the hull at a distance from the opposite ends thereof, so as to divide this interior of the hull generally into two end chamber sections and an intermediate chamber section. The end chamber section 32 may extend the full height of the scow and be divided by a central vertical longitudinal bulkhead 35 which is tight and two side longitudinal partitions 36 which extend downwardly from the deck but terminate short of the bottom of the hull, so as to leave a passage 37 thereunder, as shown in Figs. 1 and The other end chamber section is divided horizontally by a partition 38 into a lower primary bilge water chamber 39 and an upper trap chamber 40, and these chambers are also divided vertically by a central longitudinal bulkhead 41 which is tight, and. two side longitudinal partitions 42 which extend downwardly from the deck and terminate short of the bottom of the hull, so as to form passages thereunder, as shown at 43 in Figs. 1 and 3.

The intermediate chamber section consists of two longitudinal intermediate chambers 33 arranged lengthwise on opposite sides of the wells, and a transverse intermediate chamber 44 which communicates at its opposite ends with said longitudinal chambers. This transverse intermediate chamber is divided centrally by a tight upright bulkhead 45 and is separated at its ends from the longitudinal chambers by upright longitudinal partitions 46, which extend downwardly from the deck and terminate short of the bottom of the hull, so as to form passages 47 thereunder, as shown in Figs. 1 and 4. Each of the upright side partitions is preferably provided with a manhole 48 to afford access to the interior of the hull for inspection and repairing.

49 represents two emergency valves which control ports or passages whereby commu nication is established between the primary chamber 39 and the adjacent ends of the longitudinal chambers 33 of the intermediate section, and 50 represents similarvalves which control ports or passages whereby communication is established between the opposite ends of these longitudinal chambers 33 and the opposite end chamber 32 of the hull. 51 represents two transfer ducts or conduits arranged lengthwise in the longitudinal chambers, respectively, and each communicating at its lower end with the end chamber 32 adjacent to the bottom of the hull while the elevated end of each of these transfer conduits communicates with the trap chamber 40 at a distance above the bottom of the latter, as shown in Figs. 1, 3 and Each of the transfer conduits is p'r'ovided with an emergency valve 52.

iilrepresents two drain pipes arranged on opposite sides of the hull and each containing a hand operated-valve 54 and having its upper end, opening into the trap chamber at the bottom thereof while its lower endextends to'the exterior of the hull at a point below the trap chamber, this being preferably accomplished by extending these drain pipes through the bottom of the hull, as shown in Figs. 1 and 3.

The valves 49, 50, 52 and 54 have their stems extending upwardly above the deck where they are accessible to the attendant but preferably have their handles arranged under the coamings where the same are out of the way and not liable to be damaged while operating the scow. j

Assuming that the valves 49, 50 and 52 are open and the valves 554 closed, and the scow is empty and setting high in the water, as shown in F ig.. 1, the operation of bailing the hull while loading and unloading the scow is as follows:

First, the well next to the end chamber 32 is loaded with material which rests principally on the wall 17 and the adjacent part of the door of the respective well, whereby this door is tilted somewhat and the corresponding end of the hull is sunk deeper into the water, as shown in Fig. 6. This causes any water which may have leaked into the bull to gather in the end chamber 32 inasmuch as any Water at this time in the primary chamber 39 will flow from the same through the valves 49 into the intermediate chamber section and from the latter through the valves 50 into the gathering chamber 32. The valves 50 are now closed and the other well. is filled with material corresponding to the first-mentioned well, whereby the hull is caused to settle uniformly in the water or substan tially so, throughout its length, as shown in Fig. 7. The well next to the gathering chamber is the first to be emptied, which causes the corresponding end of the hull when relieved of its load, to rise while the opposite end of the hull which is still loaded remains deeper in the water, as shown in Fig. 8. When this occurs, any water in the gathering chamber 32 flows from the same through the transfer conduits 51 into the trap chamber 40. ll now the load is discharged from the well next to the trap chamber, that end of the hullalso rises so that the entire hull sets high in the water and the water in the trap chamber cannot return to the gathering chamber, owing to the discharge ends of the transfer conduits 131 being arranged at a distance above the bottom of the trap chamber. When the hull is thus relieved of its burden and sets high these valves are again closed and the bailing operation for the time being is completed and may be repeated" in the manner described as often as necessary or desired. It is to be noted that by this means the hull of the soow, exceptingfor the manipulation of the valves, is practically self bailing, and that the actual work of ejectingthe water from'the hull is done by power which is de rived from the" weight of the material which is loaded into the hull, thereby effecting a considerable economy in the operation ofa seow inasmuch asthe cost of separate pumpinn for this purpose is saved.

In the event that any of the compartments become punctured, the emergency valves 49 and-52 are close'dto prevent all of the compartments from being flooded and sinking -the scow.

I claim as my invention 1. Al scow comprising a hollow hull provided at one end with a trap which elevated above thebottom of the hull while its other end is provided with a lower chamber extending down to the bottom of th hull, and a valved conduit leading from said lower chamber to said elevated trap.

2. A scow' comprising a hollow hull provided 'at one end with a trap which is ele vated above the bottom of the hull while its other endis provided with a lower chamber extending down to the bottom ot the hull. a valved conduit leading from said lower chamber to said elevated trap, and a valved drain conduit leading from said trap to the ext'eriorot said hull and to a point below said trap.

3-. A scow comprising a hollow hull provi ed adjacent to one end with a transverse bulkhead an d a h orizontal partiti on arranged above that part of the {bottom between said bullmead and the adjacent end-o1 the hull and forming" lowerbilgechamber and 6(5)" an upper trap chamber, a transverse bulls head arranged atthe other end of the hull and forming with the latter a gathering chamber extending to the bottom of the hull and communicatim; with said lower bilge chamber bya valved conduit, and

t er'tending from the gath- 7 9' cent to the bottom there 7 l p chamber above the partition tvlll'iil' g' the bottom thereot.

l aw comprising a hollow hull provided. adj ent to one end with a transverse bulkhead and a hori: 'ntacl PttI'Llt-lOll arranged above that part of the bottom betv'ien said bu bhead and the adjacent end at the hull ant .(lln1l1lg a lower bilge cham- ,er and an upper-tr L cltaamber, tran bulkhead Iarnnged at the other end hull and torniing with the latter a hermg chamber extending to the bottom th hull an]. commu iclting with said chamber by valved conduit, a conduit ending from the gatheriber djacent to the bottom thereof p ichamber r.bove the partition wing. the bottom thereof, and a valved Jain oipe leading from the bottom of said .7 p chamber to the exterior of said hull below the trap. chamber.

5; A scow comprising. a hollow hull prof led adjacent to. one end with a transverse :head and. horizontal partition arr iged above the. part of the bottom between said bulkhead. and the adjacent end of the hull and forming a lower bilge chamber and an-upper trap chamber, a transverse bulkhead arranged at the other end of the hull and tormiz with the latter a gathering chamber extending to the bottom of the h all and communicatingwithsaid lower e chamber by a valved conduit, a transr conduit er; ending from. tlie'gathering ihamber adjacent to the bottom thereof to the trap chamber above the partition formthe bottom: thereof, a valved drainpipe me; "from the bottonro't said trap chamvided adjacent to one end with atransverse bulkhead and. a llUllZOlltLll part'it-ionf arranged above that part of the bottom between said bulkhead and the adjacent end '05 the hull. and 'l'orming a lower bilgechamher and upper trap chamber. a trans verse bulkhead arranged. at the other end of the hull and forming. with the latter a gathering chamber extendin' to the bottom Of the hull an d' communicating with said lower l'rilgc clrunber by a valved conduit, a transl'er conduit extending il'rom; the gathering chamberadjacent-to the bottom thereof to the trap chamber above the partition forming the bottom thereof, a valved drain pipe l liding from the bottom of said trap chamberto the exterior of said hull below the trap chamber, and' a valve in the line of communication between said bilge chamber and the gathering chamber.

to the exterior oi? said hull below the chamber, a transfer conduit extending upwardly f om said gathering chamber to said trap chamber above the bottom of the latter, and a valved drain pipe extending from said trap chamber to the exterior of the hull and to a point below said trap chamber.

a scow comprising a hollow hull provided adjacent to one end with a transverse bulkhead and a horizontal partition arranged above the bottom oithe hull between said bulkhead and the adjacent end of the l ill forming a primary bilge chamber and a trap chamber above the primary chamber, a tranaverse bulkhead arranged at the other end or" the hull and forming with the respective end of the hull a bilge gathering chamber, that part oi the hollow hull between said transverse .bullrheads' forming intermediate bilge chamber, a

chamber and said intermediate chamber and between said gathering chamber and said trap chamber.

9. A scow comprising a hollow hull having a door controlled well extending from the top to the bottom thereof, intermediate hambers arranged lengthwise on opposite sides 01 said well, a lower primary bilge chamber arranged at one end of the hull and communicating with both of said intermediate rhambers and a trap chamber arranged above the primary bilge chamber, a gathering chamber arranged at the opposite end of the hull and communicating by valved passages with the respective ends of said intermediate chambers and inclined. transfer conduits arranged in said intermediate chambers and extending from the gathering chamber adjacent to the bottom thereof to the trap chamber above the bottom of the latter.

10. A scow comprising a hollow hull having a door controlled well extending from the top to the bottom thereof, intermediate chambers arrangedlengthwise on opposite sides of said well, a lower primary bilge chamber arranged at one end of the hull and communicating with both of said interme diate chambers and a trap chamber arranged above the primary bilge chamber, a gathering chamber arranged at the opposite end of the hull and communicating by valved passages with the respective ends of said intermediate chambers, and inclined transfer conduits arranged in said intermediate chambes and extending from the gathering chamber adjacent to the bottom thereof to the trap chamber above the bottom of the ]atter, said end chambers being divided lengthwise by upright bulkheads arranged on the median line of the hull.

HARRIS T. DUNBAR.

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