Improvements in Sheet-iron Corrugated Roofings.
Year: 1897

page_text: Improvements in Sheet-iron Corrugated Roofings.
I, CARL ERLINGHAGEN, of Remscheid, in the Kingdom of Prussia, Germany;
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The object of my invention is a corrugated iron roofing arranged in steps or laps
owing to bents arranged transversely to the corrugations and in step-like formation
at the junction of the metal sheets to prevent the entrance of snow or rain-water
and to allow for expansion with changes of temperature. The junction of the metal
sheets may be provided with gutters of lenticular or other suitable form being
placed transversely or parallel to the bents..
Corrugated sheet-iron roofing, as made at present, has the great disadvantage,
especially when it has but a slight slant, of admitting the rain and snow water at the
junction of the plates. This disadvantage is most evident when the wind blows with
some strength in the direction of the slope of the roof.
Consequently, it has been found necessary to meet this objection by giving a very
great pitch to such roofs, and a slope of only 1 to 10 is considered insufficient,
because the rain driven by the wind would, with such a pitch, pass between the metal
sheets, seeing that the latter are only riveted and cannot be soldered for fear of the
sheet-iron being ruptured by changes of temperature. Now, according to my
invention, corrugated sheet-iron roofing may be made perfectly proof against rain
and snow, however slight may be the pitch. Another point to be noticed is that, in the
system hitherto employed, the metal sheets being riveted together cannot give way in
the direction of their length and consequently the expansion caused by difference of
temperature takes effect on the ridge or on the eaves of the roof.
But when the roofs are long, such expansion must affect the riveting and do
injury at the junction of the plates, since the whole of the roofing does not share in
the expansion movement. The result is that the roof ceases to be water-tight.
My invention remedies this evil, for I do not rivet the plates, or sheets, together,
the upper one is merely fixed in position by a joist-clamp and it holds the lower one
in its place thanks to the lentiforin gutters, stamped in the metal at the junction-
lines, thus preventing the latter plate from slipping. It will be seen that each
plate, or sheet, has one side free allowing it to expand with the changes of
temperature. By this arrangement I am able to solder the metal sheets in the
longitudinal direction of the corrugations, seeing that sufficient allowance is made
for the expansion of the metal.
The ridge-covering, previously corrugated, as well as the formation of the gutters
in lenticular design are produced by a second stamping.
The ridge-covering may be of any height. The guiters, may assume a form
different from the lenticular one.
Dated this 16th day of January 1897.
5
L. DUVINAGE,
Agent for Applicant,

page_text: I, CARL ERLINGHAGEN, of Remscheid, in the Kingdom of Prussia, Germany,
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:-
The present invention concerns a new system of roofing made of corrugated
sheet-iron arranged in stairs.
This roofing offers the following advantages: it may be constructed with any slope
whatever, even with a very slight one, while, on the contrary, the sheets used up
to the present moment require a steep slope to prevent, as much as possible, the
rain and snow from being blown between them, an inconvenience which does not
exist with this new system of roofing, which moreover, allows the free expansion of
the sheets.
In the annexed drawing which illustrates my invention
Fig. 1 shows a side view of the roof;
Fig. 2 is a part section of the roof showing the juncture of the corrugated sheets ;.
Fig. 3 is a transverse section of the sheets according to a, b ;
Fig. 4 is a transverse section of the same sheets according to c, d.
Fig. 5 is a broken plan view of the roofing and
Fig. 6 is an enlarged view showing in a section the mode of connection of the
sheets with the beams.
The roof is composed of corrugated sheets so arranged that the undulations are
longitudinally in the same direction as the slope and that each sheet has its upper
part covered by a sheet of the row which precedes it, and itself covers, at its lower
part a sheet of the row following, that is to say, the sheet i covers the lower sheet h
and is itself covered in the same way at its upper part by the sheet of the row which
precedes it, see Fig. 2.
The corrugated sheets are bent transversely at their upper and lower extremities
according to a, b and c, d as shown in Fig 2 and are fixed by means of clasps f
engaged, under the beams h and holding at the same time the upper edge of a
sheet and the lower edge of the preceding sheet . The upper part of the lower
sheet rests upon the head of the beam h. The superposed bent edges of the sheets
are fixed together and to the clasp f by means of rivets. The hooked part of the
clasp which projects in the direction of the down slope engages under the head of the
beam and prevents the roofing from lifting or slipping.
Owing to the bends and the system of attaching the sheets, the latter can expand
freely in a longitudinal direction; moreover the expansion in the transverse direction
is easily operated owing to the undulation of the sheets, even if a soldering is made
in the direction of this undulation to obtain a great solidity and perfect joining of
the sheets placed one after the other.
It is easy to see that with their bents, the sheets will prevent all admission of snow
and rain in the interstices, even when the slope of the roof is very slight; moreover,
the placing of these sheets is very simple, since it suffices to fix them with the clasps,
taking care to commence at the bottom of the roof, inasmuch as the rows of sheet
cover one another successively.
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 :-
1. A roofing in corrugated sheet-iron in which the sheets are bent at their joining
points so as to form stairs in order to prevent the rain or snow from getting into the

page_text: interstices specially with roofings of slight slope, and to allow the free expansion of
the sheets by change of temperature.
2. A roofing in corrugated sheet iron distinguished by the transverse bending of
the sheets in opposite direction at their two extremities.
3. A roofing in corrugated sheet-iron in which the sheets are fixed by means of
clasps engaging under the beams of the roof and holding at the same time two rows
of sheets.
4. A roofing in corrugated sheet iron substantially as described and shown.