IMPROVEMENTS IN COATING METALS
Year: 1852

page_text: LETTERS PATENT to Edmund Morewood, of Enfield, in the County
of Middlesex, and George Rogers, of the same place, Gentlemen,
Sealed the 12th January 1853, and dated the 1st October 1852.
PROVISIONAL SPECIFICATION left by the said Edmund Morewood
and George Rogers at the office of the Commissioners of Patents,
with their petition, on the 1st October 1852.
We, Edmund Morewood and George Rogers, both of Enfield, in the
County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN COATING METALS" to be as follows:-
This Invention consists, First, of improvements in coating zinc with
lead, by placing a thin sheet of lead upon a plate of sheet zinc, and,
after heating them, to roll them so as to unite them: Secondly, the
Invention consists of an improvement applicable when coating iron, to
prevent it oxidating, by mixing with the sand a small proportion of sal-
ammoniac: Thirdly, the Invention consists of employing three rollers,
when coating metals, with motion communicated to the middle one, so
as to cause the plates or other articles to descend on one side into the
bath of metal, and ascend on the other side of the middle roller. We
can make two rollers answer the purpose, but we prefer three or more.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Edmund Morewood and George Rogers, in the
Great Seal Patent Office, on the 1st April 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, We,
Edmund Moorewood, of Enfield, in the County of Middlesex, and
George Rogers, of the same place, Gentlemen, send greeting.
WHEREAS, Her Most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of October in the year of our
Lord One thousand eight hundred and fifty-two, in the sixteenth year
of. Her reign, did for Herself, Her heirs and successors, give and grant
into us the said Edmund Morewood and George Rogers, Her special
licence, that we, the said Edmund Morewood and George Rogers, our
executors, administrators, and assigns, or such others as we, the said
Edmund Morewood and George Rogers, our executors, administrators,
and 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 COATING METALS,"
upon the condition (amongst others) that we the said Edmund
Moorewood and George Rogers, or one of us, by an instrument in
writing under our hands and seals, or under the hand and seal of one
of us, should particularly describe and ascertain the nature of our 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 we, the said Edmund Moorewood and George
Rogers, do hereby declare the nature of the said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement thereof (that is to say):
One part of our Invention consists in coating zinc with lead by
pressure and heat; and in carrying out this part of our Invention we
prefer to proceed in the following manner; we take a thin sheet of
lead, and place it upon a plate of sheet zine, and, after heating them to

page_text: the
proper temperature for rolling zinc, pass them between rollers, under
such a degree of pressure that the zinc shall be a little extended in the
operation. If the union between the two metals is not then complete,
the operation should be repeated, and if the surfaces of the metal in
contact be clean, the union or adhesion of the two metals will become
complete.
Another part of our Invention consists in immersing sheets or other
articles to be coated (which have been previously cleaned by acid) in
hot sand, in which there has been previously mixed a little sal-ammoniac;
thereby to a certain extent preventing the oxidation of the iron in
exposing it to hot air in the customary manner.
Another part of our Invention consists in the employment of three
rollers within the bath of molten metal, when coating sheets of iron or
other metal.
Figure 1, shows a section of the bath, and the arrangement of rollers
for coating with molten metal, according to our improvements. The sido
rollers a, b, so move with the middle roller c, as to cause the sheet of
metal d, (to be coated) to descend between the rollers a, c; and on the
workman bringing the end of the sheet of metal d, which entered
the bath last, into contact with the roller b, on the other side of the
roller c, by means of a hooked iron rod e, or other suitable contrivance,
the hooked end of which being placed under the lower edge of the
sheet of metal d, as it descends from between the roller a, c, enables
him to tilt its upper edge in the direction to enter between the rollers
b, c, between which it is raised out of the bath. Thus, the revolution of
the c, and b, rollers carry up the coated sheet, to be withdrawn from the
molten metal on the opposite side of the bath to which it entered.
The rollers move in the direction as shown by the arrows, a guide bar
6, being placed near the opening between the middle and back rollers.
Motion is communicated to the middle roller, c, by the cog-wheel f,
taking into a toothed wheel c', on the axis of the roller c, which takes
into and drives the toothed wheels a', ', on the axis of the rollers a,
6; and the rollers a, b, c, are supported in bearings, as shown. The
rollers a, b, are capable of adjustment by the wedges and screws a², b²,
to govern their distance from the middle roller, so that sheets of metal

page_text: of varying thickness may be passed between them, to be coated; the
bearings in which the axis of the rollers work should be large enough
to allow the axis to revolve freely when submerged in the molten metal,
which is marked H, in the drawings; and it is well to keep the rollers
in motion until the metal sets, on leaving off work...
Although we describe three rollers, two only may be used, if; they
work in such a direction as to carry the sheet downwards when the
metal is to be introduced, and if the revolution is reversed when the
sheet is to be raised up again; or the two rollers may be used alone for
.withdrawing the sheets from the molten metal, or carrying them down
into it. We use a bar g, as shown at Figure 2, to divide the upper
part of the bath, so placed as to separate the flux or surface at which
the sheets enter the molten metal from that at which they are with-
drawn.
In witness whereof, I, the said George Rogers, have hereunto set
my hand and seal, this Thirtieth day of March in the year of our
Lord One thousand eight hundred and fifty-three.
GEORGE ROGERS. (L.S.)
Witness, FRED HARRIS.