A New or Improved Method of Coating Plates and Sheets of Iron with Copper or Brass, and Apparatus to be employed in effecting the said Coating.
Year: 1889

page_text: Date of Application, 12th Mar., 1889
Complete Specification Left, 4th Dec., 1889-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
A New or Improved Method of Coating Plates and Sheets of Iron
with Copper or Brass, and Apparatus to be employed in effecting
the said Coating.
I WILLIAM EDWARD EVERITT of Kingston Metal Works Adderley Street Birmingham
in the County of Warwick Manufacturer do hereby declare the nature of this Invention
to be as follows:-
In coating plates and sheets of iron with copper or brass by the method constituting
my invention I take the sheet or plate of iron to be coated the said sheet or plate being
free from scale or rust and I cover the said plate or sheet with a thin layer of finely
granulated hard solder to which is added finely powdered borax. The sheet of copper
or brass with which the sheet or plate of iron to be coated is placed upon the layer of
hard solder and borax and the whole is exposed to a bright red heat. The borax and
hard solder are thereby melted and pressure being applied the sheet of copper or brass
is securely attached to the sheet or plate of iron.
The apparatus 1 employ for conducting the process consists of a furnace and a pair
of rolls. The furnace has openings at its opposite sides. Through one of these
openings the sheet or plate of iron with the sheet of copper or brass upon it with the
interposed layer of hard solder and borax is introduced into the furnace and the
said sheets having been heated to the required temperature pass out of the furnace
at the other opening. Immediately opposite and close to the opening at which the
sheets pass from the furnace is a pair of cylindrical rolls between which the heated
plates are introduced. By the rotation of the said rolls (which are driven by steam
or other power) the sheets are subjected to great pressure and are thereby firmly
brazed together.
Sheets or plates of iron coated with copper or brass according to my invention are
suited for the manufacture of steam boilers for the coating or covering of ships and
vessels and for a variety of other purposes. Where the said plates or sheets require
for the purpose of fixing them or for other purpose to be pierced with holes the iron
at the said piercings may be protected from any voltaic action which might otherwise
be set up by the bolts pins or rivets employed by being coated with copper either by
chemical or electro deposition.
Dated this 12th day of March 1889
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Method of Coating Plates and Sheets of Iron
with Copper or Brass, and Apparatus to be employed in effecting
the said Coating.
I WILLIAM EDWARD EVERITT, of Kingston Metal Works, Adderley Street
Birmingham in the County of Warwick, Manufacturer, do hereby declare the nature
of my invention and the manner in which the same is to be performed to be partica-
larly described and ascertained in and by the following statement :—
In coating plates and sheets of iron with copper or brass by the method constituting
my invention I take the sheet or plate of iron to be coated, the said sheet or plate
being free from scale or rust and I cover the said plate or sheet with a thin layer
of finely granulated hard solder to which is added finely powdered borax. In

page_text: cleaning the iron plate from rust or oxide I preferably subject it to the action of
dilute sulphuric acid or hydrochloric acid for a short time or until the plate exhibits
bright metallic lustre. I do not however limit myself to this method of cleaning the
iron plate as the methods of cleaning iron employed by galvanizers and others and
commonly called "pickling" will answer the purpose.
The hard solder which employ is the finely granulated hard solder of commerce.
This solder I mix with about an equal quantity of finely powdered borax the said
solder and borax being intimately mixed. I cover that face of the clean sheet of
iron to which the sheet of copper or brass is to be attached with a thin layer of
the mixture of hard solder and borax. The said layer is spread as uniformly
as possible and in order to secure the desired uniformity I prefer to apply the said
layer by putting the mixture in a fine sieve and by the motion of the sieve I
sprinkle and cover the iron plate with an approximately uniform layer of the hard
solder and borax. The sheet of copper or brass with which the sheet. or plate of
iron is to be coated is placed upon the layer of hard solder and borax and the
whole is exposed to a bright red heat.
The borax and hard solder are thereby melted and pressure being applied the
sheet of copper or brass is securely attached to the sheet or plate of iron.
The apparatus I employ for conducting the process consists a furnace and a pair
of cylindrical rolls. The furnace I employ is an ordinary heating furnace such as is
commonly employed in heating metals for rolling excepting that it has the required
openings at opposite sides for the introduction and withdrawal of the sheets of metal
under treatment. These openings may be provided with hinged or sliding doors so
that the furnace by the opening and closing of the said doors may either be used
for carrying out my invention or be used as an ordinary heating furnace.
Through one of the said openings the sheet or plate of iron with the sheet of
copper or brass upon it and with the interposed layer of hard solder and borax is
introduced into the furnace and the said sheets having been heated to the required
temperature are drawn out of the furnace at the other opening. Immediately opposite
and close to the opening at which the sheets pass from the furnace is the pair of
cylindrical rolls referred to, between which rolls the heated plates are introduced. By
the rotation of the said rolls (which are driven by steam or other power) the sheets
are subjected to great pressure and are thereby firmly brazed or united together. The
melted borax is squeezed from the compound plate by the pressure employed and the
said compound plate consists of a plate of iron and a plate of copper or brass hard
soldered together.
In removing the plates from the furnace and in their first passage between the rolls
I give to the rolls a high speed so as to operate on the plates and the melted solder
as quickly as possible as the more rapidly the pressure is applied to the heated plates
the more firmly are they brazed together. After the plates have been brazed together
the compound plate may be treated by rolling at a lower temperature in order to
reduce it to the required thickness.
Sheets or plates of iron couted with copper or brass according to my invention are
suited for the manufacture of steam boilers, for the coating or covering of ships and
vessels and for a variety of other purposes. Where the said plates or sheets require
for the purpose of fixing them or for other purpose to be pierced with holes the iron
at the said piercings may be protected from any voltaic action which might otherwise
be set up by the bolts pins or rivets employed, by being coated with copper either
by chemical or electro deposition.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed I declare that I claim
as my invention :-
First. Coating plates and sheets of iron with plates or sheets of copper or brass by
interposing between them a layer of mixed granulated hard solder and borax and

page_text: exposing the said plates and the mixture between them to a bright red heat and
applying pressure to the heated plates substantially as hereinbefore described.
Secondly-Constructing a furnace having openings at opposite sides and combining
therewith a pair of cylindrical rolls to be used in conducting the coating process
5 claimed in the prior claim as herein before described.
Dated this Second day of December 1889.