Improvements in the Endless Chains and Buckets of Dredging Machinery.
Year: 1891

page_text: Date of Application, 21st Aor., 1891
Complete Specification Left, 20th Jan., 1892-Accepted, 20th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Endless Chains and Buckets of Dredging
Machinery.
I, HENRY CHRISTIAN LOBNITZ, of Renfrew, in the County of Renfrew, North
Britain, Engineer and Shipbuilder, do hereby declare the nature of this invention
to be as follows, that is to say :—
My said invention has for its object by an improved construction to render the
endless chains and buckets of dredging machinery stronger and less liable to serious
breakages than as hitherto made.
In carrying out the invention in the case of the chains each link is built up of a
number of comparatively thin plates of steel or iron (by preference rolled,) such
plates being fastened together by rivets or otherwise or simply placed side by side.
A given weight of the metal will have a greater and more uniform tensile strength
when in the form of a combination of plates than when in a single thickness; and
in the event of a deficiency of strength occurring it will be most probably in only
one of the several plates forming a link, and the link being made of sufficient extra
strength will not give way as a whole.
In a similar way, and with the same object each bucket, or the parts of it
subjected to the greatest strain and wear is to be made with two or more
thicknesses of metal.
Dated this Twentieth day of April 1891.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Endless Chains and Buckets of Dredging
Machinery.
1, HENRY CHRISTIAN LOBNITZ of Renfrew, in the County of Renfrew, North
Britain, Engineer and Shipbuilder, 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, that is to say :-
My said invention has for its object by an improved construction to render the
endless chains and buckets of dredging machinery stronger and less liable to serious
breakages than as hitherto made.
In carrying out the invention in the case of the chains each link is built up of a
number of comparatively thin plates of steel or iron (by preference rolled) such
plates being fastened together by rivets or otherwise or simply placed side
by side.
In a similar way and with the same object certain parts of each bucket, subjected
to great strain and wear are to be made with two or more thicknesses of metal.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings to
be hereinafter referred to and showing by way of example à single link of chain
and a bucket as made with my improvements.
Figure, 1, on the accompanying sheet of drawings is an elevation and Figure, 2,
a longitudinal section of one link of my improved endless chain.
Figures, 3, and 4, are a sectional end view and a side view of a bucket.
As shown in the drawings the link is built up of a number of comparatively thin
plates, P, of steel or iron, by preference rolled, such plates being fastened together

page_text: by rivets, R. The links and buckets are connected together to form the endless
chain in the usual manner by pins inserted in eyes in the ends of each link these
eyes being, by preference, made with liners or bushes, B, of iron or steel. A given
weight of the metal will have a greater and more uniform tensile strength when
in the form of a combination of plates, P', than when in a single thickness; and in
the event of a deficiency of strength occurring it will be most probably in only one
of the several plates, l', forming a link, and the link being made up of sufficient
extra strength will not give way as a whole.
The number of plates, P, forming each link may be varied in different cases
according to the dimensions and required strength.
Each bucket as shown in Figures, 3, and 4, has fixed to it a pair of ribs, Q,
which connect it to the chain links by the usual pin joints. The ribs, Q. are by
this invention built up each of two or more comparatively thin plates riveted
together and fixed to the bucket by means of angle irons riveted on.
Instead of
the ribs, Q, consisting entirely of separate plates, the bucket may be cast or
otherwise formed with comparatively thin ribs, on each side of each of which one
or inore plates may be riveted.
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 :-
1.- In endless chains of dredging machinery building up each link of two or
more comparatively thin plates of steel or iron, substantially as and for the
purposes hereinbefore described.
2. Making buckets of dredging machinery, with the parts of each bucket
connected to the chains built up of two or more metal plates substantially as and
for the purposes hereinbefore described.
Dated this Sixteenth day of January 1892.
EDMUND HUNT,
Applicant's Agent.