US131941A

US131941A - Improvement in ships davits

Info

Publication number: US131941A
Authority: US
Publication date: 1872-10-08
Anticipated expiration: 1889-10-08

Description

w.`cR0sTHwA1T.

lmprovem'ent in Ships Davits. n

N 0; 131,941. I i Patented Oct. 8,1872.

NITED STATEs PATENT OFFICE.

WILLIAM CEosTEwAIT, 0E BUFFALO, NEW YORK, AssIeNoE To WILLIAM s. cEosTHwAITE, on sAME PLACE.

IMPROVEMENT IN SHIPS DAVITS.

I Specification forming part of Letters Patent No. 131,941, dated October 8, 1872.

To all lwhom 'it may concern:

Be it known that I,y WILLIAM CRosTEwAIT, of the city of Buffalo, in the county of Erie and State of New York, have invented a certain new and useful Improvement in Davits for Vessels, of which the following is a speciiication: 4

Ships davits consist of two beams projecting from the stern of the vessel, and are used for suspendin g-the yawl-boat therefrom. They are usually secured to the railing of the vessel so asto belocated at the proper height above the surface of the water. When vessels enter port the yawl-boat is lowered into the Water, and it becomes desirable to remove the projecting portion of the davits with the lifting tackle attached thereto, j in order to prevent their being broken or injured by contact with other vessels, buildings, &c.

' I am aware that ships davits have been con- Y structed in two pieces, the inner portion being secured to the railing, while the outer portion was hinged to the former in such a manner as to allow of its being swung up vertically out of the way when desired. This construction is objectionable, as the whole weight of the outer end of the davit and its appendages have to be` lifted in swinging it up; also for `the reason that in a heavy sea the waves sometimes lift the yawl-boat and outer ends of the davits, and in receding allow the sameto the davits aboard when desired.

f In the accompanying drawing, Figure I is a plan view of the stern of a vessel provided with my improved davits; Fig. II is a side elevation on an enlarged scale of one of the davits; and Fig. III is a plan view thereof.

Like letters designate like parts in each of the figures. y

A represents the stern of a vessel, and a, the railing thereof. B B are the inner portions of the davits, rmly secured to the vessel, preferably to the railing, and C C the outer hinged portions thereof, carrying at their ends the lifting tackle d, and cut out or curved at their under side so as to clear the dead-eyes and cleats secured to the top of the railing. The hinge of the davits consists of two top and bottom plates, f, secured to the contiguous ends of the portions B and C, and 'connected by a vertical bolt, g, as clearly shown in Figs. 1I and III. h represents the braces hinged to the outer portion C of each davit at the inner side and provided at the inner end with a hook, which is engaged in aloop, c', secured to the railing a, for retainingthe outer portion C of the davit in its extended or projecting position.

The yawl-boat being lowered, the braces h are disengaged and the arms G are swung inward by means of said braces, so as to rest upon the railing, as shown by dotted lines in Fig. I,'which operation is easily and speedily accomplished, since the braces h connect with the railing of the vessel in a most favorable position for adjusting the arms C in either y direction.

What I claim as my invention is The arrangement with the stern of a vessel of the fixed beams B B and movable arms C G, when the latter are provided with braces h h, and hinged so as to swing horizontally inward after the yawl has been lowered, substantially as hereinbefore set forth. WILLIAM CROSTHWAIT.

Witnesses:

JOHN J. BONNER, EDWARD WILHELM.