Improvements in Tiles for Roofs.
Year: 1899

page_text: Improvements in Tiles for Roofs.
We, ERNST FEIGENSPAN, of Augustastrasse No. 41', Mülhausen, Thuringen,
Merchant, and PAUL MANGNER, of 8, Unterlauengasse, Jena, Tinsmith, both in
the Empire of Germany, 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:-
1
Roofing tiles as hitherto constructed have invariably the same defect, viz. that
the grooves are worked out of the thickness of the tile from its surface. The
disadvantage accruing from this construction is that, notwithstanding the intricacy
of the grooves, a heavy rain shower, or sudden thaw after snow, causes the water to
percolate through the joints, the capillary attraction being all the stronger for
large contact surfaces and for close fitting surfaces.
According to this invention the before mentioned defects and disadvantages
are obviated by entirely removing the joint from the plane of the tiles in the
manner shown in the accompanying drawings. In Figure 1, A indicates the plane
surface or covering portion of the tiles the sides B of which are bent at an angle.
according to a known manner, and conform somewhat to the shape in section of
the letter U, stretching upwards to a considerable extent and being open at
the top.
These upturned sides B are then bent to form the joint c d by which each two
adjacent tiles are secured together.
The joints are not formed in the usual manner by causing their contact surfaces
to fit each other closely for at least the greatest portion thereof, a perfect fit
being obtained by causing sharp edges to bear against flat surfaces.
To this end the portion c. as is clearly shown in Figure 2, is bent off from the
side B and is nearly parallel to A and from c a portion d is bent downwardly and
inwardly towards B to form an acute angle with c but of less width than this
latter. The interlocking portion of the adjacent tile is formed on the side B,
thereof by bending the portion c¹ so as to be almost parallel with A, and then
again bending the portion d¹ to form an acute angle with d in the direction
towards B. When the two interlocking parts are in engagement the edge of d
is pressing against the surface d, and the edge of d is pressing against the
surface c, and thus proper provision is made for the movement of the tiles while at
the same time a perfectly tight joint is obtained to effectively exclude rain and
snow and without giving rise to capillary action.
Figures 2 and 3 are of a similar form and construction except that in the
former the sides B are slightly inclined towards A. while in the latter the bends
are rounded, and the projecting joint is supported longitudinally on its inner
Bide.
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:-
A metallic roofine tile characterized in that the tight inint between the inter

page_text: locking portions formed upon the sides B is not effected by the contact between
the surfaces of such portions, but by causing the edges d' and d of the one tile
to press against the surfaces d and c¹ respectively of the second tile.
Dated this 25th day of August 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.