US1613030A - Davit - Google Patents

Description

`C. H. FULLER DAVI T Jan. 4, 19.27'.

'Filed Dec. s. 1925 2 Sheets-Sheet l Jan. 4 1927.

c. H. FULLER DAVIT Pile'd Dec. e. 1925 2 Shegts-Sheet 2 IIWN /7/5 Afm/MEV Patented Jan. 4,1927. 'f i 1,613,030

unirse srArEs PATENT OFFICE.

CHARLES H. FULLER, OF PORTLAND, OREGON.

nAvrr.

Application nle. December 8., 1925. Serial No. 73,981.

r his invention relates generally to life end nuts 26. In each boom head are moun boats such as are carried on vessels of all ed the 4sheaves 27, 28, 29 and 30. In each types, and particularly to a special form of eye 14 of the boat 12 is hooked a boat block davit to be used for launching life boats 31 which is provided with a single sheave.

from a ships deck or for raising the boat From a winch (not shown) are led the .60 from the water to a deck or wharf. boat lines 32 and 33 which always operate The vfirst object of this invention is to in unison. The position and operation of provide an exceedingly simple and efcient one line only will be described, as they are form of davit by means of which a lite identical in all respects.

boat can be quickly and safely launched. rlhe boat handling line 32, for instance, 65 The second object is to so construct the passes from its drum on the winch through davit that yit will be very light and strong its deck block 34. then around the boom and employ only the vsimplest form of rigsheave 23, then through the boat block 3l ging f and is then made fast to the sheave 27, as The third object is to so construct same shown, or is brought back down to the boat 7o that by the mere passing of a bight of each block 31 and made fast thereto, if additional boat line around a snatch block the davit purchase is desired. will operate inboard instead of outboard, Y A snatch block 35 is mounted on the deck for the purpose of handling boats back of 10 directly inboard from each deck block or inboard from the davit. 34, and their function will be explained 75 These, and other objects, will become more later. apparent from the specilication following as Also leading from the winch, and always illustrated in the accompanying drawings, operating in unison, are the boom operating in which: lines 36 and 37, only one of which will be Figure 1 is a front elevation of the davit described. The boom line 36 passes from its 80 of which Figure 2 is a vertical transverse drum on the winch through the deck block section taken along the line 2-2 in Figure 38, thence between the sheaves 21 and 23,

1 but not showing the boat in section. In thence over the sheave 30, thence around this view various positions ofthe booms are the sheave 2O and is then made fast to the shown in dotted lines. Figure 3 is a plan sheave 29. Any other fastening could, of 85 of Figure 1. Figure l is an enlarged front course, be substituted `for the sheave 29. elevation of the upper end of the mast and lWhen the device is desired to handle life boom. Figure 5 is an end elevation of the boats 0n the inboard side of the davit it is mast portion of Figure 4. Figure 6 is only necessary to slip the bight of each of an end elevation of the boom portion of theline 32 and 33 (between the blocks 34 90 Figure 4. Figure 7 is an end elevation of and their lOOOm heads) aIOund their respecthe foot for the mast and boom of which tive snatch blocks 35, which reverses the 0p- Fgure 8 is a front elevation, eration of the boom causing its action 'to be Similar numbers of reference refer to the lllbOald instead O outboard. 4.9 same parts throughout the several views. The operation of the device is as follows: 95

Referring in detail to the drawings, on When the lines are in the position shown in the deck 1() on the side 11 of a ship is placed the drawings-that is, not using the snatch v a life boat 12 on the supports 13. kThe blocks 35-and it is desired to launch a boat 12 is provided at each end with an eye boat, the boat lines 32 and 33 are hauled 1.5 14 for handling purposes. On the deck 10 sutliciently by means of the winch to make 100 at each end of the boat 12 is secured a foot the boat clear the deck and its supports, 15 which supports the rigid short vertical and the boom lines 36 vand 37 are then mast 16 and the boom 17 which is hinged on slacked away, also under the control of the the pin 18. winch. The outboard position of the blocks On the upper end of each mast is mount- 3e causes the boat to swing free of the ships 105 ed a mast vhead 19 on which are mounted side and when they clear, both sets of lines the sheaves 20, 21, 22 and 23. On the upper can be slacked away as desired. end of each boom 17 is mounted a boom head To raise the boat from the water to the 24., both of which are joined together by ships deck, the operation is simply remeans of a rod 25 which is provided lwith versed. 110

To operate the davit for inboard position, the lines 32 and 38 are passed around the snatch blocks 35 and the boom and boat lines are handled as before.

I am aware that many forms of life boat launching apparatus have been constructed in the past; I therefore do not claim my device broadly7 but I do intend to cover all such forms and modifications thereof as fall fairly Within the appended claims.

I claim:

l. A davit for handling lii'e boats having7 in combination, a stationary mast; a boom hinged at one side of said mast having a head over-hanging said mast; a plurality of sheaves on said mast and boom; an inboard deck block; an outboard deck block; a boat line; a line for said outboard deck block reeved between said boat block and said boom sheaves; a boom handling line passing through said inboard deck block, thence between a pair of said mast sheaves and then reeved between said boom head sheaves and said mast head sheaves; and an inboard snatch block for each boat line for receiving the bight of its boat line at a point between the outboard block and the boom head.

2. In a davit, the combination of a pair of spaced masts each of Which has three sheaves mounted at the top thereof tWo of Which are vertically disposed; a boom hinged at the outer side of each mast, each of said booms having a head over-hanging its adjacent mast, said boom heads having one sheave in line with said vertically disposed mast sheaves and one sheave over the third mast sheave and also having two boat handling sheaves; a boat block under said boat handling sheaves; an outboard deck block; an inboard deck block; a boat line passing through each outboard deck block, thence through one oi the boom boat sheaves, thence through the boat block and thence to the boom,y and boom handling lines passing through each inboard deck block, between said vertically disposed mast sheaves, then over the superimposed boom sheave and then around the third mast sheave to a point of fastening on said boom,

CHARLES H. FULLER.

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