US1798990A - Outrigger davit for ships - Google Patents

Description

March 31, 1931. K. R. TELLEFSEN OUTRIGGER DAVIT FOR SHIPS 3 Sheets-Sheet Filed April 6, 1929 w IIL r ATTORNEY March 31, 1931. K. R, TELLEFSEN.

OUTRIGGER DAVIT FOR SHIPS Fled April 6, 1929 3 Sheets-Sheet 2 INVENTOR ,IUE

ATTORNEY March 31, 1931. Kv Rv TELLEFSEN 1,798,990

OUTRIGGER DAVIT FOR SHIPS Filed April 6, 1929 I l 3 ShetS-Sheet 3 ATTORNEY Patented Mar. 31, 1931 UNITED STATES PATENT oFFIcE OUTRIGGER. nAvrr non SHIPS Application tiled April 6,

The present invention relates to an im-` proved Outrigger for ships, and especially a construction such as will enable the davit to be operated under all conditions.

The davits now in actual use are not of the Outrigger type, such as will permit the life boat to be lowered without causing the life boat to lill with water or be smashed against the ships side. For example the davits now constantly in use simply turn outward tol dispose the life boat in a position to be lowered into the water, and such operation can easily be :wcomplished when the water is calm. llowever during a rough sea the life boat as it is being lowered subsequently to moving it just beyond the ships .side in a position to be lowered into the water will swing back and forth toward the ships side, and will generally crash against the side of the ship, and resulting very often in serious injury to the life boat.

Then again when a life boat is eventually lowered into the water after being tossed back and forth toward the ships side, is very apt to .till with water owing to its extreme tilting. These difhculties render it extremely difficult to properly lower a life boat in a rough sea.

lilith these facts in view it is the purpose of the present invention to provide an improved Outrigger davit, which is capable of lowering the life boat without the above disadvantages, the life boat when heilig lowered, even thoughthe ship is rolling considerable, may be disposed a substantial distance from the ships side, preventing it from smashing against the side of the ship, andk thereby preventing the life boat from tilting hack and forth as it finally reaches and rests in the water.

Another purpose is to provide an Outrigger l davit which may be operated from the boat deck, until the life boat finally is lowered into the sea.

A further purpose is to provide a davit of this character having swivel frames mounted on the davit standards7 so that they are capable of rotating, in order to move the arms mounted on the frames from their inward positions to outward positionsfso that the 1929. serial No'. 353,015;

life boat may be disposed` a short distance laterally of the ships side and in a position above the surface of the water, whereby the davit standards may be substantially lowered.

A` still further purpose is to provide in a cla-vit of this kind means to cause the d'avit standard to tilt to positions to off-set the list or the roll of the ship, so that the davit standards may be tilted laterally and downwardly.

It is to he understood that the particulars herein given are in no way limitative, and that while still keeping within the scope of the invention, any desired modification of details and `proportions may be made inthe construction of the appliance according to circumstances. i i

The invention comprises further features and combination of parts to be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is view of a portion of a ship, showing the improved davit as applied and including a winch `for allowing the davit to be swung outwardly and downwardly for the purpose of lowering the life boat.

Figure 2 is a sectional View on line 2-2 of Figure 1.

Figure 3 is a sectional' View on line 3-3 of Figure l.

Figure 4 is a sectional view through a jack, to be mounted on the boat deck as in Figure l` for operating the davit standards outwardly and downwardly, when it is desired to oiiset the side list or roll of the ship.`

Figure 5 is a section of a portion of a ship1 showing the improved davit arranged with the davit standards moved to positions lat erally and downwardly of the ships side, whereby the life boat may be eventually lowered into the water.

Figure 6 is a sectional view on line 6-6 of Figure 5. p Y

Figure 7 is a topv plan view of a portion of the ships boat deck showing the davit applied with the life boat laterally and downwardly positioned, showing the cable of each wndlass slightly inward to illustrate con struction below.

Figure 8 is a detailed sectional view of the CTI il O

arm 36 and the stud 65 with immediate associated parts.

Referring to the drawings, 1 identiiies a portion of aship, the main deck 2, the mid deck 3 and the boat deck 4 being'shown, and on the boat deck a winch or windlass 5 is mounted. This winch comprises a trame 6, wherein a drum 7 is journaled, the frame 6. having the standards 8, between the upper ends of which transverse plates 9 are bolted.

rThere are two winches of the same construction used, one for each davit, standard, and secured to one end ot the plate 9 is a a Vguy wire 10, which in turn is connected at 11 to the boatdeck. Each winch also is provided with spur gears 12, carried by the shaft 13 of the drum 7. The gears 12 mesh with pinions 14 on a shaft 15. The pinions 14 inturn mesh with pinions 15a on a crank shaft 16. An operator may man the cranks at both ends of the shaft 15 so as to impart movement to the drum, on which a loweringand hoisting cable 17 is wound.

The other end ot each plate 9 has a clevis -1 hook connected to a pulley block 19 of a block and tackle. Each pulley block 19 has two pulleys.

Adjacent the projecting part ot the middeck and riveted to the solid loulwark rising from the mid-deck are angle bearings or plates 20, between the lateral projecting parts of which a davit standard 21 is pivotally bolted at 22.

Normally each davit standard is disposedv in an upright position as 1n Figure 1.

However when it is desired to lower a life boat the davit standard may be moved pivotally outwardly and downwardly, so as to dispose the upper end of the davit standard a substantial distance out from the ships side.

The outer margin of the boat deck is provided with a gutter 23, to which castings 24 are riveted at 25. The castings or plates, of which there are two, one for each davit standard, have lateral ears 26, a pair at each end.

Furthermore the central portion of each plate or casting 24 has a crotch bearing 27, into which the davit standard 21 iits when in an upright position, to relieve lateral strain on the standard. Pivoted between one pair or' ears 26 is a hasp 27 a, which overlies the davit standard, and the one pair oi ears receive an eye-pin 28, behind which the curved end of the hasp 27a engages. When it is desired to allow the davit to move outwardlyand downwardly the eye-pin 28 may be removed to allow the hasp to swing open, which will permit outward movement of the davit, to assume the position as in Figure 5. f

Each davit standard has a shoulder 29, which supports a trame 30 swivelly. This trame 30 comprises opposed side T-irons 31, between which bearings 32 are riveted at 33. These bearings are of the construction shown in Figure 3, thereby permitting the frame 30 to swivel on the standard 21 and in doing so be supported on the shoulder 29. A washer 34 engages against one of the bearings 32, with a cotter pin or similar member 35 engaging through the end of the standard 21 to retain the frame 30 adjacent the shoulder. An arm 36 though it is oi' the shape shown in Figure 5 may be of any other suitable tormation is riveted or otherwise secured at 37 and 38 to the ends of the T-irons 31.

` One end of this arm 36 has an extension plate 39, to which an eye of a pulley or sheave block 40 is attached. This block 40 carries two pulleys, same as the block 19. The cable 17 passes from the drum 7 and upwardly over one ot the pulleys in the block 19, and then down toward the block 40 and over one ot the f pulleys in the latter block, and then upwardly over a second pulley in the block 19 and then again downwardly over the second pulley of the block 40, and passes upwardly' inthe direction ot and attached to the block 19 as at 41. In this way by operating the drum 7 the davit standard can be moved to a perpendicular position arising trom the middeck ofthe ship. By allowing the cable to pay out or unwind from the drum 7, provided there is no list or rolling to the ship and after releasing the hasp, the davit standard can swing outwardly and downwardly as in Figure 5. Y

As shown in Figures 1 and 4 a jack 42 is provided. This jack comprises a casting 43 having a base and two bearings. The two bearings as identiiied by the numeral 44, are for the screw 45. The screw is not threaded in the bearings but movable longitudinally therethrough and without rotating and to accomplish this result the screw is provided with a longitudinal groove 46 into which a key 47 engages. The key and the groove prevent rotation of the screw but allows the screw to move longitudinally on the bearings.

Threaded on the screw, however, is a wheel 48, Vwhich may be operated by hand it so desired, but preferably operated by a handle 49. This handle engages any one ot the sockets 50 in the periphery of the wheel, and since the wheel is incapable of movement longitudinally of the screw, the screw is moved threadingly through the wheel, Vwhen the wheel is rotated. One end ot the screw is provided with a fork 51, which straddles the davit standard. By inserting the handle 49 in first one and then another oi the sockets of the lwheel'the screw may be i'ed longitudinally through the casting and since the :fork straddles the davit standard, the standard may be urged outwardly. This operation is essen-V tial and is accomplished when the ship is listing or rolling, and especially when the ship lists in a direction toward the ships body, as shown in dotted lines in Figure 5. This jack is not a stationaryfixture on the boat deck.

However when the ship is rolling or listing,

the jack may be carried to the davit and then positioned so that the base 53 ot' the casting 43 may be disposedin a depression 5-1 of the boat deck. When so disposed the screw may be operated to move the davit standard outwardly.

It is obvious that since there are two davits employed for the purpose of out-rigging a lite boat, so that it may be lowered to the surface of the water without crashing against the ships side or so rolling as to fill with water, there are two jacks, one for each davit standard, and there are two Winches, one for each davit standard.

As shown in Figures 1 and 5 a cable 56 is attached at 57 to an eye of a pulley block 58. Another eye 59 of the pulley block 58 is engaged with the plate 55. The pulley block 58 has three pulleys, as shown in Figure 5, and the cable 56 passes from its attachment at 57 of the block 58 downwardly over one of the three pulleys of a pulley block 60, and then upwardly over one of the pulleys of the block 58 and then downwardly over the intermediate pulley of the block 60 and then upwardly over the intermediate pulley of the block 58, and again downwardly over the third pulley of the block 60 and upwardly over the third pulley of the block 58, and then over a single pulley of a block G1. This cable then extends in a. direction toward the ship and is anchored on what is known as a cleat 62. By paying out this cable 5G from the cleat 62, that is after the davit standard has been allowed to move outwardly and downwardly as in Figure 5 the `gravity of the life boat will allow the boat to lower into the surface of the water.

As illustratedin the top plan view inFigure 7 the arms 36 at the upper ends the two davit standards are connected by means of a span wire or cable 64. To connect the span wire: a. stud 65 is riveted on each of the arms 35 as shown more clearly in Figure 8. The rivets 66 pass through the base of the stud (55A and through the flanges oit' the arm 36, and

swiveled on the stud is a plate 67. The span wire 64 connects the adjacent ends of the two plates 67, while connected to the remote ends ot the plates 67 are guy wires 68. These guy wires 68 extend in inclined directions down toward a portion not shown of the edge of the boat deck, and are designed to be swivelly connected to such edge portionin order to reinforce the davit standards, and to hold the span wire taut and thereby prevent any tension such as would cause the davit standards to be forced toward each other.

Mounted on the davit standards are clamping collars G9, between the ends 7 O of which braces 71 are secured. These braces are in turn bolted at 72 to angle plates 7 3, which are riveted to the solid bulwark 7&1, which rises from the mid-deck. By means of these braces 71 the davit standards are additionally reinforced against movement toward each other.

In operating this davit apparatus, the life boat normally resting on its beds 75 which have recesses 7 6, the swiveled frames 30' are moved, so that one end of the life boat may first move outwardly in a direction between the davit standards, one of the Winches allowing one of the cables' 17 to pay out, and

the same end of the' life boat further moved until the opposite end of the lifeboat moves outwardly in a kdirection between the davit standards, until the life boat assumes a posi.- tion a short distance outwardly of and slightly above the boat deck as in full lines in Figure 1. Then by permitting both cables 17 to pay out or unwind from both Winches, the gravity of the life boat causes the davit standards to' tilt outwardly and downwardly as in full lines in Figure 5. Jlifter thel life boat has been so disposed an operator may pay out the cable 56 from the cleat 62, until` thelife boat lowers into the surface of the water.

As previously stated should the ship be rolling or listing, the jacks may be used in the manner previously set forth.

The' invention having been set forth, what is claimed is:

1. In a davit apparatus, the combination with a pair of davit standards operatively mounted on a ships side adjacent the shipls middeclr, and having an interconnecting brace and lateral inclined remote braces, of frames operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, block and tackle means connected to certain corresponding ends of said arms including cables, certain other corresponding opposite ends of the arms having block and tackle connections including cables for the suspension of a life boat between the two davit standards, cleats on the ships boat deck for holdingl the second cables fast, the unwinding of the second cables allowing the life boat to lower, and means operatively associated with thefirst cables for paying them out and rewindingr them, for allowing the standards to move outwardly and. downwardly and then dispose them in upright position and means on the boat deck for imparting an initial outward movement of the standards when the ship listing.

2. In `a davit apparatus, the combination with a pair of davit standards operatively mounted on a ships side adjacent the ships middeck, and having an interconnecting brace and lateral. inclined remote braces, of frames operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, block and tackleI means connected to certain corresponding ends of said arms including cables certain other corresponding opposite ends of the arms having block and tackle connections including cables for the suspension of a life boat between` the two davit standards, cleats-on the ships boat deck for holding the second cables fast, the unwin'ding of the second cables allowing the lite boat to lower, and means operatively associated with the lirst cables for paying them Aout and rewinding them, for allowing the standard to move outwardly and downwardly and then dispose them in upright positions, and means mounted on the edge of the boat deck for retaining the standards in upright positions and relieving strains on said bracing means.

3. In a davit apparatus, the combination with a pair of davit standards operatively mounted on the ships side adjacent the ships mid-deck, of frames operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, block and tackle means connected to certain corresponding ends of said arms including cables, certain other corresponding opposite ends of the arms having block and tackle connections including cables for the suspension of a life boat between the two davit standards, cleats on the ships boat deck for holding the second cables fast, the unwinding of the second cables allowing the life boat to lower, and means operatively associated with the iirst cables for paying them out and rewinding them, for allowing the standards to move outwardly and downwardly and then dispose them in upright positions, and means on the boat deck for imparting an initial outward movement of the standards when the ship is listing, and means mounted on the edge of the boat deck for retaining the standards in upright positions.

Ll. Ina davit apparatus, the combination with a pair of davit standards operatively mounted on a ships side adjacent the ships iniddeck, of frames operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, said frames comprising T-irons and transverse bearings with lateral flanges operatively secured to the flanges of the T-irons, block and tackle means connected to certain corresponding ends ot said arms including cables, certain other corresponding opposite 1 ends of the arms having block and tackle connections including cables for the suspension oi a life boat between the two davit standards, cleats on the ships boat deck for holding the second cables fast, the unwinding et the second cables allowing the lite boat to lower, and means operatively associated with the first cables for paying them out and rewinding them, for allowing the standard to move outwardly and downwardly and thenV dispose them in upright positions.

5. In a davit apparatus, the combination with a pair of davit standards operatively mounted on a ships side adjacent-the ships mid-deck, of frames operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, said trames comprising T-irons and transverse bearings with lateral flanges operatively secured to the flanges of the T-irons, block and tackle means connected to certain corresponding ends of said arms including cables, certain other corresponding opposite ends of the arms having block and tackle connections including cables for the suspension of a life boat between the two davit standards, cleats on the ships boat deck for holding the second cables tast, the unwinding of the second cables allowing the life boat to lower, and means operatively associated with ythe first cables for paying them out and rewinding them, for allowing the standard to move outwardly and downwardly and then kdispose them in upright positions, angle braces between the davit standards and connecting the ships side and mid-portions of the standards to reinforce them against movement toward each other.

6. In a davit apparatus, the combination with a pair of davit standards operativelymounted on a ships'side adjacent the ships mid-deck, of iframes operatively swiveled on the upper ends of the standards and provided with laterally disposed arms, said frames comprising T-irons and transverse bearings with lateral flanges operatively secured to the'flanges of the T-irons, block and tackle means connected to certain corresponding ends of said arms including cables, certain other corresponding opposite ends of the arms having block and tackle lconnections including cables for the suspension of a life boat bet-Ween the two davit standards, cleats en the ships boat deck for holding the sec ond cables fast, the unwinding of the second cables allowing the lifeboat to lower, and means operatively associated with the first cables for v.paying them out and rewinding them, for allowing the standard to move outwardly and downwardly and then dispose them in upright positions, aspan wire with its opposite ends operatively swiveled between the arms, and guy wires extending from the swiveledl connections of' the span wire and connecting with-the ships side at remote distances from the mountings of the standardsandin alignment with the mountings.

In testimony whereof, he aflixes his signature.

KARL- R. TELLEFSEN.

Images