Improvements in Chain Pipe-wrenches.
Year: 1895

page_text: Date of Application, 24th Dec., 1895
Complete Specification Left, 24th Sept., 1895-Accepted, 24th Oct., 1896 ·
PROVISIONAL SPECIFICATION.
Improvements in Chain Pipe-wrenches.
We GEORGE SONNENTHAL and HENRY BAMFORD both Engineers of
85 Queen Victoria Street London do hereby declare the nature of this invention
to be as follows:-
This invention relates to wrenches or grips for pipes of the class known as
chain wrenches. In this class of wrench one end of a chain is attached to the end
of a lever handle and between two cheeks or discs which are provided with serrated
edges or teeth. The other end of the chain is loose.
The chain is preferably made of plate links rivetted or bolted together, the
heads of the rivets or bolts being raised or left projecting, and made to fit in slots
in another part of the wrench, so that the chain can be used long or short as
required.
Hitherto these slots have been made in the two checks or discs mentioned.
Our invention consists in making the slots in the end of the lever handle itself
and solid therewith instead of in the cheeks or discs. This we find increases the
strength of the wrench and makes it a more handy tool.
Our wrench consists of a lever handle with the necessary slots, two or more
cheeks or discs, and the chain, besides the connecting bolts and rivets.
Dated this 24th day of December 1895.
S. S. BROMHEAD,
97 Newgate Street, E.C., Agent for Applicants.
We, GEORGE SONNENTHAL and HENRY BAMFORD both Engineers of
85, Queen Victoria Street, London, 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 :-
This invention relates to wrenches or grips for pipes of the class known as
chain wrenches.
In this class of wrench one end of a chain is attached to the end of a lever
handle and placed between two cheeks or discs which are provided with serrated
edges or teeth. The other end of the chain is loose. The chain is preferably
made of plate links rivetted or bolted together the heads of the rivets or bolts.
being raised and left projecting and made to fit in slots in another part of the
wrench, so that the chain can be used long or short as required. Hitherto these
slots have been made in the two cheeks or discs before mentioned.
Our invention consists in making the slots in the end of the lever handle itself
and solid therewith instead of in the cheeks or discs. This we find increases the
strength of the wrench and makes it a more handy tool.
Our wrench consists of a lever handle with the necessary slots or notches and
two or more cheeks or discs and the chain, with the connecting bolts and rivets.

page_text: We will now describe the invention with reference to the accompanying
drawings in which :-
Fig. 1 shows a side elevation of our improved wrench, and shown partly in
section, to exhibit the teeth which catch the chain.
Fig. 2 shows an edge view of our wrench.
Fig. 3 shows a sectional elevation of our wrench in use.
Fig. 4 shows a portion of the chain with the projecting pins which engage with
the teeth in the head of the wrench.
a is the handle, and b, b, are the projecting cheeks which form the head of the
wrench; the edges of these cheeks are roughened as shown so that the tool can get a
good grip.
c is the chain, (formed of plate links), which is attached to the head of the
wrench on pivot d. This pivot pin is rivetted over at both ends, and holds the
cheeks b, b, in place.
.
The connecting pins of this chain towards its free end are made to project as
shown in Fig. 4, so that they shall engage with the notches in the enlarged end of
handle; e is the enlarged end of the handle a, the upper and lower faces of which
project outwards on either side, teeth f, being formed on the edges as shown in
Figs. 1 and 3.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In a chain wrench the system of cutting the notches or slots to engage with
the chain, in the enlarged end of the handle, as herein described and set forth.
2. In a chain wrench, the combination of the handle a, having an enlarged end e
with notches or slots therein, with the cheeks b, and the chain c, said chain having
projecting pins to engage with said notches, as herein described and set forth.
Dated this 23rd day of September 1896.
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.