IMPROVE MENTS IN PRESERVING FROM CORROSION THE SURFACES OF SHIPS PIERS BRIDGES AND OTHER ENGINEERING OR ARCHITECTURAL STRUCTURES OR CONSTRUCTIONS OR PARTS THEREOF COMPOSED OF IRON OR STEEL AND IN' THE MATERIALS OR COMPOSITIONS EMPLOYED THEREIN
Year: 1882

page_text: LETTERS PATENT to Thomas Stammers Webb of 4 Palatinate New Kent,
Road in the County of Surrey, Civil Engineer for an Invention of “IMPROVE
MENTS IN PRESERVING FROM CORROSION THE SURFACES OF SHIPS PIERS
BRIDGES AND OTHER ENGINEERING OR ARCHITECTURAL STRUCTURES OR
CONSTRUCTIONS OR PARTS THEREOF COMPOSED OF IRON OR STEEL AND IN'
THE MATERIALS OR COMPOSITIONS EMPLOYED THEREIN
"
PROVISIONAL SPECIFICATION left by the said Thomas Stammers Webb at
the Office of the Commissioners of Patents on the 12th July 1882.
THOMAS STAMMERS WEBB of 4 Palatinate New Kent Road in the County of
Surrey Civil Engineer "IMPROVEMENTS IN PRESERVING FROM CORROSION THE
SURFACES OF SHIPS PIERS BRIDGES AND OTHER ENGINEERING OR ARCHITECTURAL
STRUCTURES OR CONSTRUCTIONS OR PARTS THEREOF COMPOSED OF IRON OR STEEL
AND IN THE MATERIALS OR COMPOSITIONS EMPLOYED THEREIN
"
This invention relates more particularly to coating the surfaces of iron or steel
ships piers bridges girders columns roofing and similar engineering or architectural
structures or constructions not practically suitable for being heated in an oven
muffle or heating chamber for the purpose of preserving the same from corrosion
The said invention consists in fixing by fusion on the surfaces of the above
mentioned class of engineering or architectural structures or constructions a coating
of glass or enamel practically insoluble in water and not affected by the action of
the atmosphere without necessitating the enclosure of the said structures or
constructions in an oven muffle or heating chamber.
In carrying out my invention I employ certain glasses of the character referred
to in the specification to my patent N° 4139 A.D 1881 containing as essential

page_text: constituents protoxide of lead boracic acid and Silicic acid but varying in
composition from :-
Dentaide of land 70.6
and I use either of the above two compounds and all intervening compounds
whether alone or coloured by fusion with metallic oxides or fused with various
insoluble bodies or mechanically mixed with various colouring oxides and insoluble
bodies
I do not however confine myself to these.
I employ any fusible body or bodies of a suitable character selected from certain
chemical compounds or salts, id est the Silicates, Borates, arsenites and Phosphates
of inorganic oxides or bases, e.g. the Silicate, Borate, Arsenite, or Phosphate of lead.
I take one or more of such salts either alone or mixed with one or more metallic
oxides or insoluble bodies e.g. the oxides of cobalt, tin, or iron or sulphate of Baryta
or I take a metallic oxide or oxides as oxide of lead and mix mechanically there-
with a quantity varying according to the "hardness" of the coating required of
Silicic Boracic Arsenious or Phosphoric acids or any two or more of them. All the
bodies thus obtained may be described as glasses glazes or enamels.
Whatever may be the materials employed they must be reduced to powder and
applied in any convenient manner to the surface of the object under treatment.
The surface may be damped with some suitable liquid and the powdered materials
shaken or dusted over the surface when they will adhere thereto or the powdered
materials may be mixed with water or a light oil to the required consistence and
applied by means of a brush to the surface under treatment.
The powdered materials having been applied now proceed to fix them firmly
to the surface of the object under treatment and this I effect by fusing them with
the heat of a flame produced by burning gas or oil in any suitable manner with or
without the use of a blow pipe or blow pipes or I use an oxyhydrogen blow pipe
or blow pipes or I use a heated body such as a hot iron or a heated metal plate or
a metal box heated internally in any suitable manner and I pass or project the
flame or I hold or apply the heated body over or in front of the said covering or
coating of powdered materials until they are seen to be fused and continue to fuse
the powdered materials on the surface of the object under treatment until the
whole of the surface or so much of it as may be required is covered with an
uniform coating of the fused materials.
· Before applying the powdered materials to the surface of the object under
treatment it is necessary to remove all dirt rust and loose scale therefrom.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Stammers Webb 'in the Great Seal Patent Office on the
12th January 1883.
THOMAS STAMMERS WEBB of 4 Palatinate, New Kent Road in the County of
Surrey, Civil Engineer "IMPROVEMENTS IN PRESERVING FROM CORROSION THE
SURFACES OF SHIPS, PIERS, BRIDGES AND OTHER ENGINEERING OR ARCHITECTURAL
STRUCTURES OR CONSTRUCTIONS OR PARTS THEREOF COMPOSED OF IRON OR STEEL
AND IN THE MATERIALS OR COMPOSITIONS EMPLOYED THEREIN
"
My said invention relates more particularly to a mode or method of coating or
covering the surfaces of ships piers bridges girders columns roofing and similar
engineering or architectural structures or constructions of iron or steel not
practically suitable for being heated in an oven muffle or heating chamber with.
certain "glasses" or enamels hereinafter mentioned for the purpose of preserving
or protecting such surfaces from corrosion and consists in fixing on such surfaces
by fusion by the aid of heat applied locally and progressively as hereinafter
explained a coating of "glass" or enamel practically insoluble in water and not
affected by the action of the atmosphere; without necessitating the enclosure of
the objects to be treated in an oven muffle or heating chamber as heretofore
proposed the objects being treated either in situ in their complete form as a whole
or in separate parts to be subsequently put together as found most convenient in
practice.
The "glasses" or enamels which I prefer to employ in carrying out my invention
are of a similar character to those referred to in the specification to my patent
N° 4139 A.D 1881 in so far as they contain as essential constituents protoxide of
lead boracic acid and silicic acid but in a more extended range of proportions than
is therein given the proportions varying according to my present invention
from:

page_text: mechanically therewith a quantity, varying from 3 to 30 (three to thirty) per cent
according to the hardness of the coating required, of Silicic, Boracic, Arsenious or
Phosphoric acids or any two or more of them. All the bodies thus obtained may
be described as "glasses" glazes or enamels and are suitable for the purposes of my
invention when applied as hereinafter set forth.
"
In carrying out my invention in practice I first remove by chipping or by a
steel wire brush all dirt rust and loose scale from the surface of the object to be
preserved or protected. I then apply by the aid of a brush or in any convenient
manner to the cleaned surface of the engineering or architectural structure or
construction to be protected the said materials glasses or enamels which must
be previously reduced to powder or a state of fine division and mixed with water
or a light oil such as paraffin oil to the required consistence. If the said powder is
to be applied in a dry state the surface of the object may be first damped with
some suitable liquid such as water or paraffin oil and the powdered materials
glasses" or enamels shaken or dusted over it when they will adhere thereto.
Having applied the said powdered materials I now proceed to fix them firmly
to the surface of the object and this I effect in the open without the aid of a
muffle oven or heating chamber by fusing them with the heat of a flame produced
by burning gas or oil in any suitable manner with or without the use of a blow
pipe or blow pipes or I use an oxyhydrogen blow pipe or blow pipes-or I use &
portable heated body such as a hot iron or a heated metal plate or a metal box
heated internally in any suitable manner, and I pass or project the flame, or I hold
or apply the heated body, (as the case may be) over or in front of the said covering
or coating of powdered materials, "glasses' or enamels, until they are seen to be
fused, and I continue the operation of fusing the said powdered materials on the
surface of the object to be preserved or protected progressively over the said surface
until the whole or so much of it as may be required to be protected is covered
with an uniform coating of the fused materials.
"
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 hereinbefore in part
recited Letters Patent is:-
The hereinbefore described mode or method of preserving from corrosion the
surfaces of ships piers bridges girders columns roofing and similar engineering or
architectural structures or constructions (either in situ in their complete form as
a whole or in separate parts to be subsequently put together as found most
convenient in practice) of iron or steel by fusing thereon by the aid of heat
applied locally and progressively over the said surfaces a coating of "glass or
enamel of the character herein specified.
”
In witness whereof I the said Thomas Stammers Webb have hereunto set my
hand and seal this twelfth day of January in the year of our Lord one
thousand eight hundred and eighty three.