IMPROVED METALLIC PLATES OR PLATING
Year: 1887

page_text: Date of Application, 27th Aug., 1887
Complete Left, 8th Feb., 1888
Complete Accepted, 29th Mar., 1888
I, STEWART ROBERTSON of the firm of S. & H. Morton & Company of Leith in the
County of Midlothian, North Britain, Engineer and Shipbuilder do hereby declare
the nature of the said invention for IMPROVED METALLIC PLATES OR PLATING to be as
follows:-
This Invention relates to improved metallic plates or plating suitable for the con-
struction of boiler flues and other parts of steam boilers or other vessels for bridge
flooring and roofs and which is generally suitable for all purposes, for which, what is
commonly known as "corrugated iron" has hitherto been used. The improved plates
instead of being corrugated are formed with a series of flat parallel surfaces or at an
obtuse angle to each other whereby plates or plating so constructed constitute a series
of furrows or channels and by virtue of their surfaces being flat additional facility for
repairing the same when necessary is obtained.
J. H. JOHNSON, DAY & JOHNSON,
115, St. Vincent Street, Glasgow,
Petitioner's Agents.

page_text: Improved Metallic Plates or Plating.
I, STEWART ROBERTSON of the firm of S. & H. Morton & Co. Leith in the County
of Midlothian, North Britain, Engineer and Shipbuilder do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My Invention which relates to improved metallic plates or plating suitable for the
construction of boiler flues and other parts of steam boilers or other vessels, for bridge
flooring and roofs and which is generally suitable for all purposes for which what is
commonly known as "corrugated iron has hitherto been used consists in dispensing
with the circular or curved corrugations previously and at present employed and in
constructing the hollowed portions of the improved metallic plates or plating of flat
surfaces either in planes parallel to each other or at an obtuse angle to each other
whereby the plates or plating so constructed constitute a series of flat surfaced furrows
or channels and which, by virtue of the said surfaces being flat, enable the same to be
repaired when necessary with facility.
In order that my Invention may be properly understood and readily carried into
effect, will now proceed to describe the drawings hereunto annexed.
Figure 1, is a transverse section of a piece of plate furrowed or channelled in one
form according to my present Invention, that is to say, the surfaces marked A, and B,
respectively constituting the top and bottom of the furrows or channels lie parallel to
each other and are united by the portions C, lying at an obtuse angle to each of the
portions A, and B.
Figure 2, is a longitudinal section of a boiler flue drawn to a smaller scale than
Figure 1, and shewing the application of such channelled or furrowed plates with flat
surfaces as used in the construction thereof.
Figure 3, is a transverse section of a plate in which the furrows or channels are
triangular in section but having flat surfaces.
Figure 4, is another transverse section of a plate analogous to that shewn at
Figure 3, but in which the flat surfaces A and B, respectively are situated at a less
angle to each other than the surfaces A, and B, shewn at Figure 3.
Instead of making the different flat surfaces of the plate of uniform thickness as
shewn at Figures 1, 2, 3 and 4, they may be made of different thicknesses as shewn at
Figures 5, 6, and 7, this being effected by constructing the rolls of the mill in which
the plates are rolled so as to have wider spaces between them at those parts where it
is desired that the metal of the furrows or channels should be thickest.
It is to be understood that the width and depth of the furrows and channels may be
varied to suit the purposes of construction for which my improved plates or plating
are to be employed and in the case of flat plates or plates in the form of tubes of
uniform thickness the furrows or channels are or may be produced in or by machines
:

page_text: analogous to any of the several different constructions of machines at present used for
corrugating flat sheets or by rolling.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
Metallic plates or plating constructed with furrows or channels whose surfaces are
wholly or mainly flat surfaces either in planes parallel to each other or at an obtuse
angle to each other as distinguished from what are commonly known as corrugated
plates wherein the surfaces are curved surfaces substantially as hereinbefore described
and shown upon the annexed sheets of drawings.