US1191794A - Boat-davit. - Google Patents

Description

R.,10NES.

BOAT DA APPLICATION FILED v0| i915.

- Patented July/18, 1916.

3 SHEETS-SHEET 2.

R. JONES.

BOAT DAVIT.

APPLICATION FILED JULY 30, :915.

Patented July 18, 1916.

3 SHEETS-SHEET 3.

gmbh/[104,7

nu: nomas r'srsns m., fwamuma. wasmcmw. n. c.

UNITED STATES FATENT FFICE.

ROBERT JONES, OF FLORENCE, OREGON.

BOAT-DAVIT.

Application filed July 30, 1915.

T 0 all whom t may concern Be it known that I, ROBERT JONES, a citi-- zen of the United States, residing at Florence, in the county of Lane and State of Oregon, have invented new and useful Improvements in Boat-Davits, of which the following is a specification.

This invention relates to improvements in boat davits and has particular application to davits thatmay be swung outwardly from the side of the ship to carry the boat away from the side o-f the ship.

In carrying out the present invention, it is my purpose to provide boat davits of the class described which may be readily and quickly swung from inactive to active position, which will be connected together for simultaneous movement so as to insure the safe lowering of the boat and wherein the speed may be regulated so as to prevent too sudden dropping of the boat into the Water.

It is also my purpose to provide a connection between the davits and the life boat which will automatically release the boat from the davits when the'boat strikes the water, thereby enabling those in the boat to leave the vicinity of the ship as soon as striking the water and without the necessity of detaching theJ life boat from the davits.

A further object of my invention is to provide boat davits which will operateV etliciently and effectively under all conditions, which will be held against accidental movement to inactive position, incident to the rolling of the ship, when being lowered, and wherein the component parts of the davits and the operating mechanism therefor will be so arranged and correlated as to reduce the possibility of, derangement to a minimum.

lVith the above and other objects in view,

the invention consists in the construction,l

combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawings; Figure l is a fragmentary side elevation of aship equipped with boat' davits and operating mechanism for such davits constructed in accordance with the present invention, the parts being shown in inactive position. Fig. 9. is a fragmentary top plan view of the ship equipped with my improved boat davits and operating mechanism therefor. Fig. 3 is a fragmentary vertical sectional Specification of Letters Patent.

Patented July 1s, 1916.

Serial N o. 42,792.

view through the ship showing the davits and operating mechanism therefor in end elevation, the davits being shown in active position. Fig. 4 is a `vertical central sectional view through the davits and the operating mechanism therefor. Fig. 5 is a detail view of the brake mechanism. JFig. 6 is an enlarged collective view of the connection between vthe life boat` and one of the cables of the operating mechanism, the parts being shown in perspective and the boat broken away.

Referring now to the drawings in detail, l designates a portion of the side of a ship and 2 one of the decks of the ship. Suitably secured to the side l of the ship adja cent to the water line are vertical guide blocks 3 spaced apart in parallelism and formed with vertical slots 4, respectively, the confronting side walls lof each slot bemg formed with vertical alining grooves 5.

6, 6 designate davits having the lower ends thereof equipped with transverse pins 7, respectively, the extremities of each pin projecting beyond the edges of the davit. The lower ends of the davits 6, 6 are slidably mounted in the respective grooves 5 in the guide blocks 3 and the ends of the pins 7 engage in the vertical alining grooves 5 in the side walls of the slots 4, thereby permitting the davits to swing toward and away from the side of the vessel, and move vertically. In the present instance, the upper ends of the davits, 6, 6 are curved inwardly as at 8 toward the ship and formed integral lper ends thereof are head blocks 10, respectively, in which are rotatably mounted sheaves 11. Interconnecting the right angular bracket 9 is a cross bar 12 having the extremities thereof secured tothe respective brackets at thel juncture of the legs of such brackets and reinforcing the cross bar, 1 2 are Abrace bars 18, each having one end fastened to the cross bar and the remaining end secured to the adjacent bracket. Secured to the right angular brackets, respectively, adjacent to the v connections between such brackets and the cross bar are blocks 14 invv fso which are ournaled sheaves 15 alining `with the sheave wheels 11 in the respective head blocks 10. Secured to the deck 2 of the ship adjacent to the edge thereof below the brackets 9, respectively, are bearings 16 in which are journaled rollers 17 adapted to be engaged by the horizontal legs of therespect/ive brackets in the movement of the davits to inactive position, while secured to the deck of the ship immediately behind the respective bearings 16 are bearings 18 relatively high as compared with the height of the bearings 16 and journaled in the bearings 18 are rollers 19 adapted to be engaged by the lower legs of the brackets 9 adjacent tothe junction of the lower legs with the other legs. Y

`Suitably fastened to the deck of the ship between the davits and spaced apart in parallelism are guide rods 20, each of suitable length and having the upper portion or edge thereof formed with notches 21 appropriately spaced apart and slidably mounted upon eachl guide rod 20 is] a collar 22 connected through the medium of a link rod 23 with the cross bar 12 so as to slide the collar along the guide rod in the swinging of the davits from inactive to active position and vice versa. Pivoted to each collar 22 is a dog 24 adapted to engage in the notches 21 in the adj acent guide rod 2O in the outward movement of the davits so as to prevent accidental movement of the davits to inactive position, in the event of the ship rolling when the davitsv are put into action. |These dogs 24 are adapted to be swung to inactive position to disengage the rods 20 when the davits are being elevated so as to permit the return of the davits to normal position.

Suitably mounted upon the deck 2 of the shipA immediately behind each davit arebearings 25 and journaled in the bearings 25 is a shaft 26 carrying a drum 27 and fixed to the side of the drum 27 and disposed concentrically of the shaft 26 'is ai spur gear 28. Journaled in horizontally alining bearings surmounting thebearings 25 and extending across the space between the drums 27 is a horizontal shaft 29 upon which are keyed pinions 30 meshing with the spur gears 28, respectively, and fixed upon one end of the shaft 29 is a crank handle 31 by means of which the shaft may be rotated to impart motion to the drums 27, such motion being .A transmitted through the pinions 30 and spur gears 28 meshing with the pinions.

Keyed upon the shaft 29 is a brake drum 32 and surrounding the brake drum 32 and adapted to frictionally engage the periphery 1.- thereof is a brake band 33 having the ends thereofV connected with a lever-34 at the opposite sides of the fulcrum of such lever. In the present instance, the-lever 34 is pivoted upon the support of an adjacent bearing 25 and is for-med with a slot 35 through which is passed a sector 36 carried by the support of such bearing 25. Threaded through an opening in one wall of the slot 35 is a set screw 37 adapted to engage the sector 36 to hold the lever in the desired adjusted position.

Secured to each drum 27 is one end of a cable 38 and the remaining end of each cable 38 is trained through the blocks 14 and 19 carried by the adjacent bracket and davit and over the sheave wheels of such block and secured to the remaining end of each cable is a casting 39 embodying a loop 49 and a loop 41 formed integral with the loop i9 and arranged at right angles thereto.

42 designates a life boat suspended from the davits and normally, the keel of the boat rests upon the cross bar 12 and secured to the bow and stern, respectively, of the life boat are the upwardly projecting shanks 43 having the upper ends thereof formed to provide hooks 44 engaging in the loops 41 of the respective castings- 39. ln the normal position of the life boat and the davits, the loops of the castings 39 engage the head blocks 19, the latter being formed to accommodate such loops, and the life boat is thus held suspended between the davits and in a position to receive passengers in case of necessity.

In the present instance, the support of the central bearing of the shaft 29 is provided with horizontally alining eyes on one .side thereof and slidably mounted within these eyes 45 is a rod 46 having one end thereof formed with a hook 47 adapted to engage the outer side of the keel of the life boat, and the inner end formed with a handle 48 whereby the rod may be rotated within the eyes and moved longitudinally therein. Also pivoted upon said support is a lever 49 and pivoted to the lever 49 is one end of a hook 50 having the bill end thereof adapted to cngage the adjacent rail of the life boat, the hook 50 and the hook 47 cooperating with each other to hold the life boat against a cidental displacement to normal position.

Normally, the cables 38 are wrapped about Vthe drums 27 and the davits held in vertical or inactive. position with the life boat suspended between' the davits on the deck of the vessel and held against accidental displacement, as previously described. 1n this position of the davits, the lower ends thereof with passengers, is relieved of the influence of the hooks 47 and 50 and as soon as these hooks are disengaged from the boat, the keel swings clear of the cross bar under the load in the boat. The brake band is now disengaged 'om the brake drum 32, thereby releasing the shaft 29 and the drums 27. The lower legs of the brackets 9 now ride downwardly over the rollers 17 and 19 under the weight in the boat and in the downward movement of such brackets, the davits swing outwardly from the side of the ship. As soon as the lower legs of the brackets disengage the outer rollers 17, the lower ends of such davits slide downwardly in the slots 4 in the guide blocks 3 and the loops 40 of the castings 39 slip off of the head blocks 10. ln the outward movement of the davits, the cables 38 unwind from the drums 27 and the collars 22 slide along the guide rods 20, the dogs 24 idling over the notches 21 and acting to prevent any accidental return of the davits to normal position. When the collars reach the outer ends of the guide rods, the davits are brought to a stop and the boat continues to drop'funtil the saine enters the water. The hooks 44 on the upper ends of the shanks 43 are disposed at an acute angle to such shanks, and t-he upper edges of such hooks are inclined downwardly as at 51 so that as soon as the boat strikes the water and slack is produced in the cables, the castings automatically slide o' of the hooks, thereby releasing the life boat so that the oarsmen may carry the latter out of the zone of the shi lllhen it is desired to return the life boat to normal position upon the deck of the ship or vessel, the loops 41 of the casting 39 are engaged .with the hooks 44 and the drums 27 rotated under the action of the shaft 29 and crank handle 31 and in the continued rotation of the drums the cables are drawn taut and the life boat elevated from the water. ln the initial upward movement of the life boat, the davits are held in active or lowered position by means of the dogs 24 engaging in the notches 21 in the guide rods 20, and when the hangers 39 are in proximity to the head blocks 10, the dogs 24 are disengaged from the notches 21 so that the davits will be swung upwardly in the continued rotation of the drums, the collars 22 sliding along the guide rods 20 in the upward movement of the davits. As the davits swing upwardly under the action of the cables, the lower legs of the brackets 9 engage the outer rollers 17 and ride upon such rollers and in this movement of the legs of the brackets over the rollers 17 the davits are moved vertically, the lower ends of the davitsl sliding in the slots 4 in the guide blocks 3. As the lower legs of the brackets ride over the rollers 17, such legs engage the rollers 19 and the rollers 19 coact with the rollers 17 to elevate the davits. After the davits have been restored to normal position, the loops 40 of the hangers 39 are engaged over the head blocks 10 to suspend the life boat from the upper ends of the davits, and the hooks 47 and 50 engaged with the keel and side rails, respectively, of the body to prevent accidental displacement of the latter. The brake on the shaft 29 is also preferably set so as `to insure the holding of the davits in normal posit-ion.

From the foregoing description taken in connection with the accompanying drawings, the construction and mode of operation of my improved davits and operating mechanism therefor will be readily apparent. It will be seen that I have provided davits whereby the lift boat may be suspended in inactive position upon the deck of the ship and whereby such boat may be readily and quickly lowered and swung clear of the side of the ship and automatically disengaged from the davits when in the water. lt will be noted that the brake drum and the brake band controlling the shaft 29 enable the speed of the life boat, in its descent, to be regulated, thereby preventing the too sudden dropping of the boat into the water.

ldlhile l have herein shown and described one preferred form of my invention by way of illustration, wish it to be understood that do not limit or confine myself to the precise details of construction herein described and delineated, as modifica-tion and variation may be made within the scope of the claims without departing from the spirit of the invention.

I claim:

1. The combination with a ship, of davits, pivotal and sliding connections between the lower ends of said davits and the side of the ship, head blocks carried by the upper ends of said davits, respectively, sheave wheels in each head block, hangers suspended from said head blocks, a life boat supported by said hangers, cables reeved through said head blocks over the sheaves therein and having. the outer ends thereof connected with said hangers, drums connected to the inner ends of said cables, and means for rotating said drums to pull said cables to elevate said life boat and draw said davits inwardly, and means for sliding the davits upwardly in the swinging movement thereof so that the life boat may clear the deck of the ship.

2. The combination with a ship, of davits, pivotal and sliding connections between the lower ends of said davits and the side of the ship, head blocks carried by the upper ends of said davits, respectively, sheave wheels in each head block, hangers suspended from said head blocks, a life boat supported by said hangers, cables reeved through said head blocks over the sheaves therein and having the outer ends thereof connected with said hangers, drums connected to the inner ends of said cables, and automatic means for slidingsaid davits upwardly in the swinging movement thereof so that the life boat may Clear the deck of the ship.

8. The combination with a ship, of davits, pivotal and sliding connections between the lower ends of said davits and the side of the ship, head blocks carried by the upper ends of said (hwits7 respectively, sheave wheels in each head block, hc ngers suspended from said head blocks, a life boat supported by said hangers, cables reeved through said head blocks over the sheaves therein and clear the deok of the ship.

In testimony whereof I ai'lix my signature in presence oi two witnesses.

ROBERT JONES.

lWitnesses J. C. MCCUE, FLORA GAMMIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

Images