IMPROVEMENTS IN ZINC ROOFING
Year: 1884

page_text: We, JOHN MOULD and JOHN JAMES MOULD both of the firm of J Mould and
Son of Byron Works, Cock Street West Balsall Heath Birmingham in the County
of Worcester Zinc Workers do hereby declare the nature of our said invention for
IMPROVEMENTS IN ZINC ROOFING to be as follows:-
"
"
Our invention has for its object improvements in zinc roofing which is specially
applicable to the flat roofs which are so much used in certain parts of Railway
Stations but are also applicable to other roofs by which great perfection and
simplicity in construction is attained in combination with great freedom of the
various parts to expand and contract in any direction.
Various attempts have been made to construct water tight flat roofs from zinc
with more or less success but with various objections such as exposed screw holes
or the sheets overlapping each other and binding as well as in some constructions
the difficulty of sliding various parts together and the accuracy required in such
cases,
Now according to our invention we turn the edge. of each sheet upwards into a
double curl or corrugated flange the edge itself finishing with an outward curve
from the rafter ridge or other projection as the case may be.
Over the upper curls or corrugations formed by the flanges of two such sheets
coming together on each side, a rafter or other projection we spring over two or
other number of saddles which are made with a slight curve at the top and the
sides returning inwards so as to spring under the upper curl of each plate the edges
of the saddles then spreading outwards, and lying smoothly upon the roof of the
lower corrugations so that the greatest freedom and smoothness of action is allowed
to the sheets. These saddles are secured in their positions by means of zinc
intermediate blocks which rest on the rafters or other projections and support the
saddles under the upper part, screws passing through both the saddle and zinc
block into the rafters or ridges or other projections to secure the saddles down at
the top but leaving the sides perfectly free.
To stop any sliding or lateral movement more than to a small degree we secure
a rib or ribs at each of the saddles to the plates.
The corrugated flanges so made are next covered by a cover plate placed over
the projection at the junction of the said corrugations. This cover plate is also
made of a circular shaped top with the bottom edges turning outwards so as to
rest smoothly upon the root of the lower corrugations of the said plates. There is
thus neither any sliding motion required nor are there any parts to bind or stick
in our new roofing.

page_text: We JOHN MOULD and JOHN JAMES MOULD both of the firm of J. Mould & Son
of Birmingham in the County of Worcester do hereby declare the nature of our
said invention for IMPROVEMENTS IN ZINC ROOFING" and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement and accompanying sheet of drawings to be as follows that
is to say :-
บ
Our Invention has for its object improvements in zinc roofing which is specially
applicable to the flat roofs which are so much used in certain parts of Railway
Stations but are also applicable to other roofs by which great perfection and
simplicity in construction is attained in combination with freedom of the various
parts to expand and contract in any direction the whole of the parts being entirely
of zinc. Various attempts have been made to construct water tight flat roofs from
zinc with more or less success but with various objections such as exposed screw
holes or the sheets overlapping each other and binding as well as in some con-
structions the difficulty of sliding the various parts together and the accuracy
required in such cases.
Now according to our invention we turn the edge of each sheet upwards into a
double curl or corrugated flange the edge itself finishing with an outward curve
from the rafter ridge or other projection as the case may be.
Over the upper curls or corrugations formed by the flanges of two such sheets
coming together on each side a rafter or other projection we spring over two or
other number of saddles which are made with a slight curve at the top and the
sides returning inwards so as to spring under the upper curl of each plate the edges
of the saddles then spreading outwards and lying smoothly upon the roof of the
lower corrugation so that the greatest freedom and smoothness of action is allowed
to the sheets. These saddles are secured in their positions by means of zinc
intermediate blocks which rest on the rafters or other projections and support the
saddles under the upper part, screws passing through both the saddle and zinc
block into the rafters or ridges or other projections, to secure the saddles down at
the top but leaving the sides perfectly free. To stop any sliding or lateral move-
ment more than to a small degree we secure a rib or ribs at each of the saddles to
the plates. The corrugated flanges so made are next covered by a cover plate
placed over the projection at the junction of the said corrugations. This cover plate
is also made of a circular shaped top with the bottom edges turning outwards so as
to rest smoothly upon the root of the lower corrugations of the said plates. There
is thus neither any sliding motion required nor are there any parts to bind or stick
in our new roofing.
In order that our invention may be more clearly understood and the more easily
carried into practice we have appended a sheet of drawings which shows one
application of it to a flat boarded roof and which will be quite sufficient to enable
practical men to apply the invention to other positions and conditions. Referring
now to the drawing:
Figure 1 is a cross sectional elevation through a part of a roof showing one rib
and the joints.
Figure 2 is a longitudinal elevation with the cover cap piece A or B removed so
as to more clearly show the details.
Figure 3 is a plan of the roof also with the cover cap piece A or B removed for
A

page_text: Now turning to the end elevation Figure 1 it will be seen that there is the
boarding C upon which the joint or rib piece D is fastened. I have shown two
zinc sheets viz: E and F, the sheet E finishes at et having the two inward hollows
or corrugations e¹ and e³ and the outward corrugation e. On the other side the
sheet F finishes in a similar manner at f* with the inward corrugations f¹ and ƒ³
and the outward corrugation f. The plates are securely fastened by the saddles H
which are secured to the rib pieces 1 by the screws k upon the zinc blocks M.
These saddles may be kept in position by the ribs n. When this is done the
whole joint is covered over by the cover A or B, each being shewn in half sections
as illustrating two of the many various shapes which may be applied. The bottom
parts are bent inwards as shewn by a and b and the various lengths are sprung
open sufficiently to pass over the parts e* and f* of the side sheets.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is.
The Improvements in zinc and other roofing of the corrugated or bent edged
plates E and F covered by springing over the cover plates A or B substantially as
herein set forth and illustrated by the accompanying drawings.
Dated the 29th day of October 1884.
GEO. BARKER,
Agent for the Applicants,
77, Colmore Row, Birmingham,
GEO. BARKER,
Agent for the Applicants,
77, Colmore Row, Birmingham,