An Improved Coupling Link for Chains.
Year: 1889

page_text: Date of Application, 13th Dec., 1889
Complete Specification Left, 10th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
An Improved Coupling Link for Chains.
I JEREMIAH COWDY of 40A Queen Street Cheapside London E.C. Merchant do
hereby declare the nature of this invention to be as follows:-
With the present split link used for joining two pieces of chain together, it
frequently happens that if an unusual strain or pull is given to the chain the link
opens out or the link end is forced straight aliowing the chain to become detached.
The object of my invention is to so lock or hold the over-lapping ends of the link
as to practically prevent them opening, and if an unusual strain is put on the chain in
which the link is inserted, the chain itself would break before the link opens out. I
will now proceed to describe my invention :-On either side of the lock link just
where the chain bears upon it I form an indentation; the action of the indentation is
such that as the link of the chain is inside the split link it fills up the space of the
indentation. When a strain is given the split link cannot open out as it is held
locked by the next link of the chain.
Raised balls or lips, two on either side of the split link may be substituted for the
indentations, their action being the same.
Dated this 13th day of December 1889.
JOHN P. O'DONNELL,
Agent for the said Applicant.
COMPLETE SPECIFICATION.
An Improved Coupling Link for Chains.
I, JEREMIAH COWDY of 40* Queen Street Cheapside, London, Merchant 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:-
With the present split link used for joining two pieces of chain together, it
frequently happens that if an unusual strain or pull is given to the chain the link opens
out or the lock end is forced straight allowing the chain to become detached. The
object of my invention is to so lock or hold the over-lapping ends of the link as to
practically prevent them opening, and if an unusual strain is put on the chain in
which the link is inserted, the chain itself would break before the link opens out. I
will proceed to describe my invention reference being made for that purpose to the
accompanying drawing.
Fig. 1 is a plan of my improved lock link.
Fig. 2 is a section A, B of fig. 1.
Fig. 3 is an end view of Fig. 1.
In these figures it will be seen that at the end of the link which is opened for joining
two chains an indentation C is made on either side. The action of the indentation is
such, that as the link of the chain is inside the split link it fills up the space of the
indentation, when a strain is given the split link cannot open out as is held locked
by the next link of the chain.
Figs. 4, 5, 6 and 7 are mere modifications of my invention; raised balls as at C², C¹
figs. 4 and 5, or raised lips as at C, C figs. 6 and 7 being substituted for the
indontatina af sm 12

page_text: Having now particularly described and ascertained the nature of my said inven
tion and the manner in which the same has to be performed, I declare that wha
1 claim is
My improved form of split link substantially as, and for the purpose described and
as illustrated on the accompanying drawing.
Dated this 10th day of July 1890.
JOHN P. O'DONNELL,
Agent for the said Applicant.