Improvement in Zinc Roofing.
Year: 1895

page_text: Date of Application, 22nd Feb., 1895-Accepted, 23rd Mar., 1895
Improvement in Zinc Roofing.
We, HEINRICH BONGARTZ, Manufacturer and WILHELM BONGARTZ, Manu-
facturer, both of Raderthat near Cologue in the Province of Rhineland and
Kingdom of Prussia 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 subject of this invention is a zinc roofing, by which it not only becomes
possible to cover in a roof perfectly water-tight but in which the nails used to
fasten the zinc plates to the wood covering of the roof are also covered by the zinc,
thus preventing the former from being destroyed.
The annexed drawing represents on a diminished scale in Fig. 1 in front view and
in the Figures 2 and 3 in sections a zinc roof of the new construction; Figure 4
shows in detail the jointing of two neighbouring plates and their fastening to the
wood-covering; Fig. 5 in detail the little cap.
The single plates used for roofing, the length of which may of course vary, are
provided, as will be seen from Fig. 4, on two opposite edges with a roll a a 1 forming
in section a round hook opening downwards, and these rolls are then pushed into
each other in the manner shown in Figure 4.
In this manner the plates are then laid, one after the other, alongside and over
each other, so that the plates of the upper row always somewhat overlap those of
the row immediately beneath them, the rolls of the upper row, at the same time,
entering into those of the lower. The edges of the plates are at the same time well
soldered, as is usually the custom.
At the upper and lower edge of the roof, where there is the gutter, zinc strips cc
are put on, as will be seen from Figure 1.
The continuous rolls, that are formed in this manner, bb (Fig. 1) which are open
on both sides, are then, in order to prevent the entrance of water etc., supplied
with caps d d at the top and at the bottom, the lower one of which has a small
opening above, in order to allow any vapours, which may form inside the roll to
escape through it. These caps are likewise well soldered to the strips c, c as well
as to the rolls. In order to firmly connect the zinc roofing with the wood-covering,
one or more (in Fig. 1 for instance one is drawn) zine strips e (Fig. 4) are pushed
into the roll at each plate, so that they lie below the zinc plates and are fastened to
the wood-covering with nails.
By this means the nails, being covered by the zinc which lies over them are
protected against the influences of the weather.
Having now particularly described and ascertained the nature of our said inveu-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
Zinc roofing, in which the single plates are hung on to each other by means of
rolls formed at the edges by their being bent back and in which the continuous
rolls are closed on both sides by caps and the plates are nailed on to the wood-

page_text: covering of the roof by means of strips pushed into the rolls and situated beneath
the plates.
Dated this 21st day of February 1895.
For HEINRICH BONGARTZ and
WILHELM BONGARTZ,
Bernh. Brockhues.