IMPROVEMENTS IN SHAPING, COATING, AND APPLYING SHEET METAL TO BUILDING PURPOSES
Year: 1852

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, EDMUND
MOREWOOD and GEORGE ROGERS, both of Enfield, in the County of Middlesex,
Gentlemen, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-fourth day of
March, One thousand eight hundred and fifty-two, in the fifteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Edmund Morewood and George Rogers, our exors, admors, and
assigns, Her especial licence; full power, sole privilege and authority, that
we, the said Edmund Morewood and George Rogers, our exors, admors, and
assigns, or such others as we, the said Edmund Morewood and George.
Rogers, our exors, admors, or assigns, should at any time agree with, and no
others, from time to time and at all times hereafter, during the term of years
therein expressed, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, in the Islands
of Guernsey, Jersey, Alderney, Sark, and Man, and in all Her Majesty's
Colonies and Plantations abroad, our Invention of "IMPROVEMENTS IN SHAPING,
COATING, AND APPLYING SHEET METAL TO BUILDING PURPOSES;" in which said
Letters Patent is contained a proviso that we, the said Edmund Morewood
and George Rogers, or one of us, shall cause a particular description of the
nature of our said Invention, and in what manner the same is to be per-
formed, by an instrument in writing under our hands and seals, or under

page_text: the hand and seal of one of us, to be inrolled in Her Majesty's High Court
of Chancery within six calendar months next and immediately after the
date of the said in part recited Letters Patent, as in and by the same, reference
being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Edmund Morewood and George Rogers, do hereby declare that the nature of
our said Invention, and the manner in which the same is to be performed,
are fully described and ascertained in and by the following statement thereof,
that is to say :-
One part of our Invention consists in preparing sheets of iron or other
suitable metal in such a manner that the plate or sheet shall be alternately
thick and thin; and we prefer that such inequalities in the thickness of the
sheet metal shall be gradual, that is, passing from the thinner to the thicker
parts gradually, as shewn in the annexed Drawing; the relative proportions of
the thicker and thinner portions may, however, be varied. These inequalities
in the thickness of the plate we produce by means of rollers turned to the
corresponding shape through or between which the iron or other metal is passed,
as is well understood. We employ sheets of metal thus prepared of alternate
thick and thin portions, for corrugating, and we prefer that such sheets or
plates be so corrugated that the thicker portions may be on the raised part of
the corrugated sheet, but we do not confine ourselves to their being in this
position in relation to the corrugations. And in order to secure this we take-
care that the size of the corrugation be such that the thick portions shall come
at the desired situation or position. We also use such sheet metal of unequal
thickness for the construction of ships for, panelling, and various other useful
purposes. In roofing or covering buildings with corrugated metal or metal
having other flutes or projections upon it, we have found advantage from so
laying the metal that the corrugations or other indentations or projections, and
the wood rolls, if there be such, shall run obliquely from the ridge, or in other
words diagonally across the framing of the roof. In covering roofs upon this
principle, when they are of the ordinary form and without hips, we place
If we have a
either a roll or a gutter up the middle of each side of the roof.
gutter up the middle of the roof the flutes from the upper portions of the
roof run into it right and left in oblique directions. If we have a roll up the
middle of the roof instead of the gutter, and the roof be of ordinary form,
and without hips, we prefer to place a gutter up each end to receive the water
from such flutes as do not reach the eaves. If the roof be a hipped one we
prefer to have the flutes of such degree of obliquity that they shall run on the
one side parallel to the hip, and it will be obvious that ou the opposite side an

page_text: ordinary hip cap only may be used; or we could put a roll up the middle, and
in such case we prefer the flutes to run parallel with the hips on each end.
Another portion of our Invention consists in stamping or otherwise corru-
gating sheets of metal or coated metal in an oblique direction. In carrying
out this part of our Invention we take a sheet of the metal required to be:
corrugated, and having cut it with a sufficient bias to allow for the drawing in
of the metal in the direction at right angles to the flutes, we form the first:
flute at one of the elongated corners; we then proceed to form the flutes:
one after the other until we reach the diagonal opposite corner of the sheet..
We stamp the flutes with an ordinary corrugating.machine.
Another portion of our Invention has for its object the obtaining of a thick
coating of lead or tin, or their alloys, upon zinc or suitable alloys of that
metal, by the employment of a pan or other suitable means to retain the
molten metal about the zinc in the process of dipping such zinc into molten
metal. In carrying out this part of our Invention, we proceed as follows:-
We take a piece of zinc, and we prefer that it should be stout wrought zinc,
and, having cut it to the internal size of the mould herein-after referred to, we
clean its surface with acid, as is well understood; we then place it in a mould
such as is shewn in the Drawing. The depth of this mould must be varied.
according to the size and thickness of the sheet of coated zinc to be produced.
We prefer that it be about three quarters of an inch deep, and that the piece.
of zinc to be laid in it be about three-eights of an inch. The piece of zinc
is laid upon the ledge shewn upon the inside of the mould; the mould, with
the zine in it, is then dipped, in a more or less vertical direction, into the bath
of molten lead, and while in the bath is turned into an horizontal direction, and
in that direction lifted out of the molten metal; but some variation as to tho
direction may at times be desirable, or the lead may be poured into the iron.
mould, the zinc having been previously heated. The zinc must be kept down
in its place by means of tongs or other suitable contrivance; the mould or
pan is then set aside and the zinc is still to be kept in its place until the lead
has set, when the compound slab may be turned out and allowed to cool. The
temperature of the molten lead in this process should be kept as low as prac-
ticable, and we prefer to dip the mould or pan into the molten lead each time
before laying the zine in it, in order to bring the pan or mould up to the
temperature of the lead before introducing the zinc. If it be wished to coat
one side of the zinc only instead of both, we smear the other side with a
solution of gum or glue, or some other adhesive or obstructive matter, in
order to prevent the contact of the two metals. In such case we prefer to
put sand or other powdery matter in the lower portion of the mould, and

page_text: either dip the pan containing the zinc into molten lead, or its alloys, as before
described, or make both it and the zinc (or the zinc only) hot by placing them
or it on a hot iron slab, or in some other suitable way, and then pour the
necessary quantity of molten lead into the pan. The slab or zinc should be
secured in its place by a wedge or other suitable contrivance. Slabs thus
prepared may then be extended by rolling or otherwise. When we use cast
zinc or spelter in the foregoing operations, we have discovered great advantage
is obtained by what is called forging or beating the coated slab, in preference to
rolling it so as to break down the grain of the zinc, after which it may be
rolled or otherwise extended.
In witness whereof we, the said Edmund Morewood and George Rogers,
have hereunto set their hands and seals this Twenty-third day of
September, in the year of our Lord One thousand eight hundred and
fifty-two.