US2313802A

US2313802A - Safety raft slip lock

Info

Publication number: US2313802A
Application number: US464022A
Authority: US
Inventors: Carlsen Johan Frederik
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-10-31
Filing date: 1942-10-31
Publication date: 1943-03-16
Anticipated expiration: 1960-03-16

Description

March 16; 1943. J. F. CARESEN I 2,313,802

SAFETY RAFT SLIP-LOCK Filed on. 31, 1942 2 Sheets-Sheet 1 March 16, 1943. JIF. CARL-SEN" 4 2 AFE-Tzf RAFT smr LOCK Filed-papal, 1942 2 Shqets-Sheet 2 INVENTOR. fem/v E 6421.55.

Patented Mar. 16, 1943 UNITED STATES PATENT OFFICE SAFETY RAFT SLIP LOOK Johan Frederik Carlson, Brooklyn, N. Y. Application October 31, 1942, Serial No. 464,022

Claims.

This invention relates to safety raft slip locks which are devices for automatically releasing safety life rafts from ships in the event of torpedoing or sinking from other reasons at sea, and specifically it refers to an improved slip lock which is automatically opened by a float as soon as the float is submerged in water.

Slip locks of the present type have been known for some time and consist of a pivoted hook or latch which is slipped through an eye and fastened in such a way that it is only necessary to slip 0d a locking member and thereby releasing the hook or latch. Due to the fact, however, that this locking member may accidentally come loose a and thereby cause the loss of the life raft at sea,

it is common practice to secure same by means of a seizing which has to be out 01f before the slip lock can be opened. Recentexperience has shown, however, that in torpedoings where the shipis liable to sink in very short time the crew usually runs directly for the life boat and no one will take time off to run forward or aft to unloosenthe life rafts. For this reason it had often happened that the life rafts have gone down with the ship and the boats may have been damaged and sunk thereby preventing the rescue of the members of the crew who had in the ocean.

The object of my present invention, therefore,

is to provide a safety raft slip lock which will automatically release the raft when the ship sinks.

Another object of my invention is to provide a slip lock which can be adapted to and fitted over the devices presently available thereby making the installation simpler and furthering the adaption of this life saving device.

Still another object of my invention is to provide a device which is simple to manufacture and of low cost and which is safe and effective in operation.

Other objects and advantages of my invention will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a life raft having a slip lock in its closed position embodying my invention,

Figure 2 is a side elevation of the same life raft as shown in Figure 1, but in open position,

Figure 3 is an enlarged side view of the slip lock in closed position,

to jump Figure 4 is an elevation along line 44 in Figure 3,

Figure 5 is a section along line 5--5 in Figure 3.

Figure 6 is a section along line 6-6 in Figure 3, and 1 Figure 7 is a side elevation of a slip lock such as used today without my invention.

In the drawings,wherein for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral I ll designates a life raft or safety raft of the type commonly used on cargo vessels and usually carried in rigging in the fore and aft masts, one on each side of each mast. The life raft I0 is held against the stays II by means of the rope l2 which extends from ring l3 to eye H. The eye [4 connects rope 12 to link l5. The hook member I6 is pivoted around the lower end of the link [5 and held in its closed position by the slip ring IT. The hook member I6 is engaged with the chain 18 and this arrangement, as described supra, constitutes the present slip lock as used on most ships, see Figure 7. To prevent the slipping off of the ring 11, a seizing 39 is placed around link I5 above the ring I1 and this seizing has to be cutor unraveled to permit the opening of the latch member l6,

My improved device, as shown in Figures 1, 2, 3, 4, 5 and 6, consists of a double latch I9 which is pivoted on bolt 20 and heldtogether at one end by bolt 2!. The bolt 20 is welded to a clamp member 22 which is fastened to link l5 by means of clamp 23 and bolt 24. The latch members ill have a hook 25 at one end which fit over ring l1 thereby eifectively locking same in place. The

clamp members

22 and 23 may be adjusted upward or downward on link 25 thereby placing the members IS in the most suitable position locking ring I1, see Figure 3.

The latch members I 9 are preferably made from sheet metal and are bent together at one end and held in place by bolt 2| so as to form a lever pivoted on bolt 20, see Figure 5. Pivoted on bolt 2| and placed in a position between the two latch members I9 is a lever 26 which on one end carries a knife edge 21 and which has a rope 28 attached to its other end. The lever 26 also has stop

pins

29 and 30 which will limit its rotation by striking agalinst latch members IS. The rope 28 is connected with one end to float 3| which is preferably supported in a suitable manner on top of the life raft Ill. The support of float 3| is arranged so that it is free .to float up if submerged in water.

The chain l8 may be fastened to the deck 32 or to the rail 33 and it is obvious that this methd of fastening can be arranged in many different ways. It is also obvious that the principle of the float-operated latch, as illustrated by members I9, lever 26, rope 28 and float 3|, is subject to many variations in various applications of this principle. I do not wish to be limited to the exact form or shape disclosed in the drawings.

The operation of my invention is as follows: Assuming that the old. type slip lock is present, as illustrated in Figure 7, my new device is fitted on same by fastening

clamps

22 and 23 on link I by means of bolt 24 and adjusted to a position Where the hooks 25 will retain the ring H in a suitable position when the latch members. l9 are in the extreme downward position, as indi link, a slip ring locking said hook to said link, and float operated latching means whereby said slip ring may be automatically moved out of engagement with said hook thereby releasing same.

2. A safety raft slip lock of the character described, comprising an elongated link; a hook member hinged'to said link, a slip ring slidable on said link whereby said hook member may be locked in its closed position and float operated latch member adjustably fastened to said link, whereby said slip ring may be automatically moved out of engagement with said hook thereby releasing same.

cated in Figure 3. To secure the latch members IS in the locked position and prevent accidental opening of the same and loss of the life raft, a seizing 3A is placed around the members l.9 .and the hook I5. This seizing 34 is preferably made with manila. yarn or twine and. is pulled. tight so'that the knife edge 21 will easily cut same when the rope 28 pulls lever 26. upward. When an emergency arises, the float 3| will float up andgive a sudden pull on ropev 28 which for that reason has a slack, as indicated in Figure 1. This sudden pull will cut off the seizing 34 and thereby free the latch members H1 and simul taneously lever 25 has been pulled upward until; stop 38 hits member 19. Thelever 2 6 and members [=9 will now form one lever with fulcrum on bolt and the pull of rope 23wil1 move this lever upward, thereby swinging hook out of. engagement with ring I1 and the curved cam surface lBa willpush ring I! upward until the,

hook member i5- is: released; Thechain I3 will then drop off, as indicated in Figure 2, and rope I2 is released, thereby releasing the, life raft, l0;

without any attention or special action of the scribed; comprising a link, a hook hinged on said 3. A safety raft slip lock of the character described, comprising an elongated link; a hook member hinged at one end to said link, a slip ring slidable over said link whereby said hook may be locked in its'closed position; a latch member adjustably fastened to said elongated link, said latch member having a hook at one end fitting over said slip ring and a curved cam surface. adjacent to said hook; a lever pivoted at one end: of said latch, member, said lever having a knife edge on one end and; being, fastened with its, other: end; to a float whereby said float may operate said lever and said latch members thereby releasing said hook.

4,. A safety raft slip lock of the character described, comprising an elongated link, a hook member hinged at the lower end of said link; a slip ring slidable over said link whereby said hook member may be locked in its closed position; a pair of latch members adjustably fastened to said link, said latch members having a hook at one end fittingover said slip ring and curved cam surface adjacent to same; a lever pivoted at; the other end of said latch member, said lever having a knife edge on one end and stop pins engageable with said latch members, and a float attached to the other end of said lever whereby same maybe operated thereby opening the slip lock. Y r v v 5. A- safety raft slip lock of. the character described, comprising an elongated link; a hook member hinged to said link, a locking ring slidable on: said link whereby said-hookmay be held: in its closed position and float operated latching means whereby a seizing may be automatically cut andsaid locking ring moved out of engagement; with said hook thereby-opening same.

JOHAN F REDERIK CARLSEN';