Improvements in Roofing.
Year: 1898

page_text: Date of Application, 13th Apr., 1898
Complete Specification Left. 2nd Jan., 1899-Accepted, 11th Feb., 1899
Date of Application, 13th Apr., 1898
Complete Specification Left. 2nd Jan., 1899-Accepted, 11th Feb., 1899
Improvements in Roofing.
I, HENRI JOACHIM MURAT, of Rue de Levis 36, Paris, France, Manufacturer,
do hereby declare the nature of this invention to be as follows;-
-
.
This invention relates to means of effecting watertight roofing with plates of
glass, metal or other suitable materials without the use of any cement.
For this purpose, the joists are made of section somewhat in the form of an
inverted with the middle rib standing up beyond the general level of the roof,
and the ends of the horizontal arms turned up so that a gutter is formed on each
side of the middle rib. The edges of the roof plates rest on these turned up arms,
and these plates have at or near their edges upwardly projecting ribs. Over the
middle rib of the joint is fixed a continuous cover consisting of a broad strip of zine
or other suitable sheet metal bent to nearly the form of an inverted V with a
rounded angle and with its two iuclined limbs curved a little outwards and resting
on the roof plates on each side just beyond their upwardly projecting ribs. In
order to hold the covers in position, bent pieces of sheet metal are passed horizontally
through slots at intervals cut in the middle rib of the joist near its upper edge,
then are bent up vertically to pass through slots of the cover over which they are
again bent horizontally.
Under the cover there may also be held in horizontal slots of the middle rib other
pieces of metal strip which are bent down and press on the edges of the roof plates.
On these edges may also be laid, close to the middle rib of the joist, packing strips
of felt or like material.
When the roof plates are of sheet metal they are preferably corrugated or undu-
lated to give strength, and their edges where they rest on the arms of the joists
have these undulations more or less flattened.
It is sometimes desirable to have a wooden roof protected by sheet metal above it.
In such cases the margins of the wood rest on the arms of the joists, and over these
margins are fixed wooden fillets parallel to the joists, the corrugated or undulated
sheet metal resting on those fillets; thus there is formed an air space between the
wood and the sheet metal. The edges of the sheet metal are either turned vertically
up within the inverted V cover, or they are bent so as to form semicircular ribs
projecting conversely upwards, also within the cover.
Where one roof plate overlaps the next below it, the joint is rendered tight by
inserting between the plates along their whole length a band of felt, agglomerated
cork or other elastic material held in shape by having its edge which is presented
downwards enclosed in a U trough of zinc or other metal sheet. At the ends of
this band strips of sheet metal cross it at right angles these strips having their ends
bent to form hooks, the one hook of each ingaging the upper edge of the lower plate
and the other hook engaging the lower edge of the upper plate, while the felt or
other band rests against shoulders of the bent strips.
Dated this 13th day of April 1898.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, HENRI JOACHIM MURAT, of Rue de Levis 36, Paris, France, Manufacturer,
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:-
This invention relates to means of effecting watertight roofing with plates of
glass, metal or other suitable materials without the use of any cement.
I shall describe constructions for this purpose referring to the accompanying
drawings.
Fig. 1 is a transverse section of one of the roof joists with parts of two covering
plates and the covering cap; Fig. 2.is a part side view and Fig. 3 a part plan.
Fig. 4 is. a transverse section of a modification shewing pressing strips and 'felt or
other packing. Fig. 5 is a, perspective view of the arrangement shewn in Fig. 4.
Fig. 6 shews the piece of metal which is bent as shewn in Fig. 7 and afterwards
bent over the covering cap to hold it down. Fig. 8 is a perspective view of part of
the roof. Fig. is a transverse section of part of a wooden roof covered with
corrugated sheet metal. Fig. 10 is a longitudinal section of one of the metal sheets.
Fig. 11 is a transverse section of part of a roof covered with corrugated metal sheet,
of which Fig. 12 is a longitudinal section. Fig. 13 is a plan of one of the rods
placed between the roof plates where they overlap to make the joint watertight.
Fig. 14 is a perspective of one of the hooks which hold the rods, and 'Fig. 15 is
a perspective view of part of the roof where one plate overlaps another.
Each joist a made of metal has on each side of its central rib a gutter to receive
such water as may pass the covering cap. The joist instead of being in one piece
may be made of T and angle irons rivetted together. The covering caps b of sheet
metal are bent so as to straddle the central rib which has at intervals slots a¹, the
cap having corresponding slots along its top to receive the tails of the bent pieces c
which after being passed through the slots a¹ are passed through the slots of 'b
and are then bent each way over b. Under the cap b may be placed bands 'k of felt
or other compressible material as shewn in Fig. 4 so as to ensure greater tightness,
but this is not absolutely necessary.
The roof plates e of metal or glass are made with ribs e¹ which are shewn on their
upper sides but may be on their lower sides. The margins of the plates are by
preference pressed on by bent strips d of elastic metal which are passed through
slots made at intervals in the central rib of the joist and serve to prevent the
plates e from bein raised by wind, but these pressing strips are not necessary when
displacement of the roof plates by wind is not probable. The side.ribs el when on
the upper sides of the roof plate serve to prevent water from passing in under the
edges of the covering cap, and when they are on the underside they.form drips for
such water as may enter.
When a glazed roof is not required cover plates f of sheet metal or other suitable
material may be employed these plates being stiffened by corrugations or undula-
tions.
The margins of the plates may be turned up as shewn at f1 in Figs. 9 and 10,
these margins and the adjoining parts being corrugated to little depth. Or as shewn
at in Fig. 11 the margins of the plates may be semicircularly bent over the
gutters of the joists. As shewn in Fig. 9 the sheets f may rest on fillets g' fixed on
wooden roofing g which rests on the outer edges of the joists a. Then there is an
air space between the roof y and the outer roof f preventing much passage of heat
through the roof either inwards or outwards. When this is not desired the
fillets may be dispensed with, the roof plates of resting directly on the wood g,
g

page_text: or the wood also being dispensed with as shewn in Fig. 11. Obvious both glass
and metal cover plates may be used, bands of the one material alternating with
bands of the other.
The rods shewn in Figs. 13 and 15 employed at the overlaps of the roof plates
consist of bands h of felt, agglomerated cork or other elastic material, stiffened
by U shaped clamps i of metal.
These rods placed between the overlapping plates prevent passage of water but
they have about their middle a passage i¹ for escape of water of condensation. Each
of the hooks; Fig. 14 has its one limb engaged on the edge of the lower roof plate
and its other limb engaged on the edge of the upper plate its shoulder forming a
rest for the rod h. These hooks are of sheet metal-shaped and bent as shewn and-
preferably stiffened by longitudinal ribs. When in position at each end of the
cover plates they are hidden under the covering caps b.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :--
1. A roof consisting of plates of glass, metal or other suitable material resting
on joists made with gutters on each side of a central rib, having hooked to it cover
plates bearing on the margin of the roof plates with or without elastic packing.
2. In a roof such as is set forth in Claim 1, pressing pieces held in slots of the
joist rib and bearing on the margins of the roof plates.
3. The double hooks at the overlaps of the roof plates.
4. The rods with elastic packing placed between the overlapping margins of
the roof plates.
ABEL & IMRAY,
Agents for the Applicant.