A New or Improved Composition for Coating Ships' Plates and the like.
Year: 1891

page_text: Date of Application, 1st June, 1891
Complete Specification Left. 22nd Feb., 1892-Accepted, 26th Mar., 1892
A New or Improved Composition for Coating Ships' Plates
and the like.
1, ROBERT JACKS of Commercial Chambers, King Street, South Shields, in the
County of Durham, Solicitor do hereby declare the nature of this invention to be
as follows:-
This invention relates to a new or improved composition for coating ships' plates
and the like.
To effect my purpose I make use of a mixture of tar and pitch and cement,
for which purpose Portland cement may be used, in the proportions of one gallon
or thereabouts of the two former components to two pounds or thereabouts of the
latter. A suitable proportion one and a half ounces or thereabouts in respect of
the above of any suitable patent or other drier or driers may be added if required
to complete the composition such as lithone, litharge or equivalent substance.
The proportions may however be subject to variation for various purposes.
Dated this 29th day of May 1891
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.
COMPLETE SPECIFICATION.
A New or Improved Composition for Coating Ships' Plates
and the like.
1, ROBERT JACKS of Commercial Chambers, King Street, South Shields, in the
County of Durham, Solicitor, 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 a new or improved composition for coating ships' plates
and the like.
To effect my purpose I make use of a mixture of tar and pitch and cement, for
which purpose Portland cement may be used in the proportions of one gallon or
thereabouts of each of the two former components to two pounds or thereabouts of
the latter. A suitable proportion one and a half ounces or thereabouts in
respect of the above of any suitable patent or other drier or driers may be
added if required to complete the composition such as lithone, litharge or
equivalent substance.
The proportions may however be subject to variation for various purposes.
To use the composition, apply the mixture of Stockholm tar and pitch whilst
still hot and this mixture should be thickened to a sufficient degree for such
application by the gradual addition of a sufficient quantity of Portland or other
first class cement of similar properties. The tendency to set or harden and to
remain so is further secured by the addition of a small quantity of litharge or other
suitable substance.
Such a mixture runs easily into interstices and crevices and never becomes so
hard as to crack or 66 star, a common defect in other compositions, which thus
enables the bilge and other water to get at the plating.

page_text: 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. The improved composition consisting of a mixture of tar and pitch and
cement in or about the proportions named with or without any suitable drying
medium to be used substantially as and for the purposes herein set forth.
Dated this 20th day of February 1892.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.