Improvements in Shackles for Vessels' Chains.
Year: 1895

page_text: Date of Application, 2nd Mar., 1895-Accepted, 6th Apr., 1895
COMPLETE SPECIFICATION.
Improvements in Shackles for Vessels' Chains.
I, JAMES BOYD MILLER, of Rockland, in the County of Knox, and State of
Maine, United States of America, Gentleman, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My invention relates to an improvement in shackles for vessels' chains, and consists
in the novel features of construction and arrangement of parts hereinafter fully
described in the Specification, clearly illustrated in the drawings, and particularly
pointed out in the claims.
Reference is to be had to the accompanying one sheet of drawings, in which
like characters indicate like parts in all the figures, wherever they occur.
In the drawings,—
Fig. represents a top plan view of a shackle embodying my improvements, a
portion of one side thereof being shown in section.
Fig. 2 represents a transverse vertical section on the line 2-2 of Fig. 1.
Fig. 3 represents a top view of the shackle with sections of cable attached
thereto.
Fig. 4 represents a perspective view of the shackle.
(a) (a) represent clevises provided at their open ends with eyes (b) (61) adapted
to receive a rod or pintle (c). Each clevis is provided with sockets (d) adapted to
"knuckle
receive the rounded ends (e) (e) of the opposite clevis and to form a
joint," permitting the clevises to oscillate freely upon the pivot pintlo (c), and
presents a rounded surface free from angular projections to impede tho free passage
of the shackle through the hawse pipe.
The clevises (a) (a) are secured together by the pivot rod (c) passing through
the
eyes (b) in the rounded ends or knuckles (e) (e). A sleeve (f) surrounding
the pivot rod is interposed between the ends of the clevis (a) and has a cotter or
pin (g) passing therethrough and through the pivot rod (c), the arrangement
being that the rod (c) is prevented from endwise movement by the sleeve, while
the cotter is in position, thus affording a secure fastening and adapted to be
readily detached, as it is only necessary to remove the cotter and slip out the
pivot rod (e), as will be readily understood by reference to Fig. 2.
Heretofore in dovices of this class it. has been the practice to use a U-shaped
clevis with a bolt in the open end and confined by a pin, the bolt being adapted to
pass through a link of the chain, or through the ring connected with the anchor.
This construction possesses the objection of being liable to be caught by the end
of the hawse pipe and involves the danger of breaking the shackle.
It has also been the practice to secure the pivot pin to one of the ears or
rounded ends of the clevis by means of a pin passing therethrough, which con-
struction is objectionable in that it wenkeus the clevis by reason of the hole and
increases the liability of fracturo under a heavy strain.
By securing the pivot pin in the manner herein shown, I avoid weakening the
clevis and place the cotter whore it will not weaken the pivot pin, as will be
readily seen.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A shackle for vessole' chains comr.rising in its construction two U-shaped clevises

page_text: provided with eyes at their open euds and with sockets or recesses to receive the
rounded portions of the open ends, a pintle or pivot pin extending through the
oyes of the rounded ends, a sleeve surrounding said pintle or pivot pin between
the ends of the clevises, and a cotter or pin passing through said sleove and pintle,
substantially as and for the purpose set forth.
Dated this 15th day of February 1895
JAMES BOYD MILLER.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C., Ageuts for the Applicant.