An Improved Detachable Link or Coupling.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
An Improved Detachable Link or Coupling.
I, OSWALD BERTHOLD, of 42, Dorf Strasse, Frankenau, Saxony, in the German
Empire, Farmer, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved detachable link, and has for its object to
provide a link which is capable of being readily disconnected, and which may be
applied for securing domestic animals, harnessing horses, mooring boats, or for
any other service.
My invention consists of a link in which one of the eyes, or part of the eye
of the link is formed hinged to the link, and which overlaps a coincident opened
part of the eye upon which it is superposed, and which is retained closed on the
insertion of any link therein.
In carrying my invention into effect I provide a link having one eye which is
closed, and by which a link may be affixed to the chain or to the part upon which it
it is to be used, while at the opposite end of the link a hook eye is formed integral
with the link, opened so that a link or fastening may be introduced into the eye,
while a superposed hinged hook piece is secured to the link, which, on being
superposed upon the hook piece closes the eye and embraces the link or fastening
previously introduced therein, so that a fastening is thereby effected which cannot be
disconnected except by manipulation of the hinged hook piece of the link.
I may form the hook limbs of the open eye of the link by cutting the required part
of the link in halves, and subsequently forming the link and the extremity of the
disconnected part so as to form a hinge upon which the limb may be provided to
open or close the eye.

page_text: the same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to an improved detachable link, and has for its object to
provide a link which is capable of being readily disconnected, and which may be
applied for securing domestic animals, harnessing horses, mooring boats, or for any
other service.
My invention is illustrated in the accompanying drawings, in which :-Figure 1 is
a side elevation,
Figure 2 is a plan corrresponding thereto.
Figure 3 is an elevation shewing a detachable link opened and connected to a series
of ordinary chain links, while Figure 4 is an elevation shewing a detachable link
closed and connected to a series of ordinary chain links.
My invention consists of a link in which one of the eyes, or part of the eye of the
link is formed hinged to the link, and which overlaps a coincident opened part of the
eye upon which it is superposed, and which is retained closed on the insertion of any
link therein.
In carrying my invention into effect as illustrated in the accompanying drawings I
provide a link A having one eye a which is closed, and by which a link such as B may
be affixed to the chain or to the part upon which it is to be used, while, at the
opposite end of the link a, a hook eye f is formed integral with the link, opened so
that a link such as C or fastening may be introduced into the eye f, while a
superposed hinged hook piece g is secured to the link A, which on being superposed
upon the hook piece f closes the eye and embraces the link or fastening previously
introduced therein, so that a fastening is thereby effected which cannot be
disconnected except by manipulation of the hinged hook piece g of the link.
The hinged hook piece g is connected to the link A by means of a pin h
passing through the boss gi of the hook piece g, the link A being suitably
recessed to receive it. The hinged hooked piece g is formed in section semi-
circular with its lower face flat, while the hook eye f is of the same section with
an upper flat face so that as the hinged piece being superposed upon the hook eye the
completed link will be of a substantially circular section as illustrated.
It will thus be seen that on the introduction of a chain link or a fastening within
the hook eye and the closure of the hinged piece g that the link so introduced or the
fastening that embraces the parts will preclude the possibility of accidental opening
of the hinged piece so that the fastening will be secure, and only capable of
disconnection when required
I may form the hook limbs of the open eye of the link by cutting the required part
of the link in halves, and subsequently forming the link and the extremity of the
disconnected part so as to form a hinge upon which the limb may be provided to open
or close the eye.
It is obvious that instead of providing only one hook eye f upon the link A, two
hook eyes may be formed, in which case a further hinged hook piece would be mounted
within a suitable recess upon the opposite side of the link and upon the same pin h,
the openings of the respective hook eyes being also oppositely disposed.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I
claim is :-
1, A detachable link in which part of one of the eyes (or both) is formed hinged to
the link, and overlaps a coincident opened part of the eye upon which it is superposed,
and which is retained closed upon the insertion of any link or fastening therein
substantially as described.
2, A detachable link in which part of one of the eyes is formed as a hook eye
integral with the link, while a hinged hook piece completes the eye, such hinged
hook piece being secured to the link substantially as hereinbefore described and
illustrated.

page_text: 3, A detachable link constructed as and for the purposes hereinbefore described and
illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.