IMPROVEMENTS IN SHEATHING OR COVERING SHIPS' BOTTOMS AND OTHER SURFACES, AND IN D "
Year: 1873

page_text: LETTERS PATENT to Benjamin Lumsden Thomson, of Gracechurch
Street, in the City of London, for the Invention of "IMPROVEMENTS
IN SHEATHING OR COVERING SHIPS' BOTTOMS AND OTHER SURFACES, AND IN
D
"3
PROVISIONAL SPECIFICATION left by the said Benjamin Lumsden
Thomson at the Office of the Commissioners of Patents, with his
Petition, on the 3rd December 1873.
I, BENJAMIN LUMSDEN THOMSON, of Gracechurch Street, in the City
of London, do hereby declare the nature of my said Invention for " IM-
PROVEMENTS IN SHEATHING OR COVERING SHIPS' BOTTOMS AND OTHER SURFACES, AND
IN THE PLATES TO BE EMPLOYED THEREIN," to be as follows:-
This Invention relates to an improved mode of sheathing or protect-
ing ships' bottoms and other surfaces, and is partly based upon the

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Lumsden Thomson in the Great Seal.
Patent Office on the 2nd June 1874..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
LUMSDEN THOMSON, of Gracechurch Street, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of December, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Benjamin Lumsden Thomson, Her
special license that I, the said Benjamin Lumsden Thomson, my
executors, administrators, and assigns, or such others as I, the said
Benjamin Lumsden Thomson, my executors, administrators, or assigns,
should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Man, an Invention for "IMPROVEMENTS IN SHEATHING OR COVERING
SHIPS BOTTOMS AND OTHER SURFACES, AND IN THE PLATES TO BE EMPLOYED
THEREIN," upon the condition (amongst others) that I, the said Benjamin
Lumsden Thomson, my executors or administrators, by an instrument
in writing, under my hand and seal, should particularly describe and
ascertain the nature of the said Invention, and in what manner. the
same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately.
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Benjamin Lumsden Thomson, do
hereby declare the nature of my said 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 :—
This Invention relates to an improved mode of sheathing or protecting
ships' bottoms and other surfaces, and is partly based upon the In-
vention for which Letters Patent were granted to James Brown, No.
1838, in the year of our Lord One, thousand eight hundred and seventy--
one...

page_text: According to one part of my Invention, with a view to causing the
enamelled plates referred to in the Specification of the said Patent to
adhere more securely to the surface to which they are applied, I fill or
cover the said sheathing or covering plates on their inner face with any
suitable cement, glue, or other adhesive material, either heated or
otherwise, and after such adhesive material has been so applied the
plates may be sent into the market. When they are to be applied to
any surface the said surface is previously coated with the glue or other
adhesive material, and are when necessary, with the said plates, warmed
by portable gas burners or coke fires applied along their respective
surfaces or by the application of salamanders, braziers, or any other
method which may be found suitable, after which the plates are pressed
firmly in contact with the surface so as to produce perfect adhesion by
the aid of pressure frames applied either directly by hand or by screws
or props or other means of applying pressure.
In order to ensure a better adhesion of the glue or other cement to
the said plates, I make their inner surface rough in any suitable
manner, for example, by the application of sand, silica, or other like.
substance which is caused to adhere thereto, or by any mechanical
means.
I further bend over or turn down the edges of the said plates in order
that when applied the said edges shall become embedded in the
adhesive composition, thereby effectually preventing all access of water
between the edges or joints of the plates or underneath the composition
or glue on the surface so covered or protected.
These plates may also be applied to the covering of all surfaces either
intended to be submerged or laid under ground, also in the construction.
of buildings, and for the covering of walls, roofs, and ceilings.
Having now described and particularly ascertained the nature of my
said Invention and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider to
be novel and original, and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is,-
First. The application and use of glue or other adhesive substance by
heating or otherwise as a coating or covering to the inner side or surface
of the enamelled metal plates referred to in the Specification of Jame

page_text: Brown, No. 1838, in the year of our Lord One thousand eight hundred
and seventy-one, and also to the faces or surfaces to which the said
plates are to be applied, substantially as and for the purposes herein-
before described.
Second. Bending over or turning down the edges of the said plates,
substantially as and for the purpose herein-before described.
In witness whereof, I, the said Benjamin Lumsden Thomson, have
to this my Specification set my hand and seal, this First day
of June, One thousand eight hundred and seventy-four.