US52392A - Edward davidson - Google Patents

Description

UNITED STATES PATENT OFFICE EDWARD DAVIDSON, OF PROVIDENCE, RHODE ISLAND.

Speoification forming part of Letters Patent No. 52,392, dated February 6, 1866.

T0 all whom it may concem:

Be it-known that I, EDWARD DAVIDSON, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved Chain-Hook; and I do hereby d'eclare that the following is a full, clear, and exactdescription thereoi, which will enable others skilled in the art to make and use the same, reference being had to the acoompanyingdrawings,formingpart ofthis specification.

The present invention relates to a ehainhook especially designed to be used in conneotion With the cable-chain of an anchor when it is to be heaved, so that by attaching the hook, one end of which is made fast 130 the vessel, to the cable-chain at snob point of its length as corresponds to the depth to which it is designed to heave the anehor, the ohain, when the anchor has reached suoh depth, will tous be held, thereby releasing the windlass or other device by which the anchor is hauled in or raised of all strain, and leaving it free to be used for any other purpose Which may be desired, tlfis chain -hook being s0 constrnoted as to enable it to be readily detached or uniastened from the chain at pleasure, as will he readily apparent from the detail description, reference being had to the accompanying plate of drawings, in which Figure 1 is a plan or top view of the chainhook; Fig. 2, a section taken throngh its length in the plane of the line :22, Fig. 1; and Fig. 3, a plan cr top view of,the two jaws of the hook, showing their joint, With the main portion or shank of the hook broken away.

Similar letters of reference indicate like parts.

A in the drawings represent the shank-portion of the hook, by the eye a at one end of whioh it is seonred to the dock of the vessel directly to a fixed staple thereof or throngh a connecting chain or rope. To and in the other end of this shank are hung, upon a common pin or pivot, b, two similar jaws, c c, the outer ends of whioh are made of a hook form,

d, a short pin or stud, at or near the hook end of one of the jaws, projecting from its inside face or surface. Between these two jaws, as plainly shown in Fig. 3 at their hooked ends, the eable-ohain of the anchor is placed, With the stud or pin 61 throngh one of its'links, the next linl; upon the inside of the hook, bearing against the same and extending aoross from onejaw to the other. The ohain is then tightly held between the two jaws of the hook by swinging the cap or clasp B, hung npon the common center pin, 1), of thejaws, down npon and over the jaws at or near their tnrning point, as shown in the drawings, the pr0ngf, npon the under side of the olasp B, entering and passing through thejaws. By this means thejaws are tightly held together, firmly clasping the chain in and between its jaws, to relieve whioh, when so desired, it is only nocessary to' press the end g of the clasp down, throwing its clasp np from thejaw, and at the same time disengaging its prong therefrom,

With a chain:hook eonstructed as thus deseribed it is obvious that it canbe easily detaohed from the ohain, even when a severe strain or tension is on it, which is quite an important advantage over ohain-hooks as heretofore construoted and used for a similar purpose.

It may be here remarked, in conclusion, that my improved chain-hook herein-above desoribe Lcan be used to advantage in connection with my improved anchor tripper or heaver, for whioh I have also made application for Letters Patent of the United States.

I claim as new and desire to secure by Letters Patent- The construction of the swinging jaws c 0 of the chain-hook With the holding cap or clasp B, having a prong, f, arranged together, substantially as and for the pnrpose described.

EDWARD DAVIDSON.

Witnesses:

JOHN D. THURSTON, WILLIAM M. CONNELLY.

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