A New Way of Constructing Light Fireproof Building Material Possessed of the Quality not to be Eaten by Insects and therefore specially adapted for Hot Climates
Year: 1897

page_text: Date of Application, 24th Sept., 1897-Accepted, 24th Dec., 1897
COMPLETE SPECIFICATION.
"A New Way of Constructing Light Fireproof Building Material
Possessed of the Quality not to be Eaten by Insects and therefore
specially adapted for Hot Climates."
AI, CHRISTIAN WILHELM LUTHER, of Reval, Russia. Manufacturer of Wooden
Articles. 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:
:―
For the erection of Buildings possessed of the above named qualities, I use a
Building material consisting of three or more sheets of Veneer cemented together in
such a manner that the fibres of the different layers of Veneer cross. The Cement with
which the glueing is done consists of a mixture of Caseine (85 to 60%) or a substance
similar to it and slacked Lime 15 to 40% or any alkalic substance similar to it and
so much water that a Cement is produced which may be easily laid on with a brush.
To this Cement, materials, insoluble in water and altogether do not in any way
influence the character of the Cement, may be added for cheapness sake.
This Cement after drying will be waterproof. Such Veneer boards composed of
different layers of Veneers cemented together with their fibres crossing are much
less combustible than ordinary boards.
To make however these Veneer boards still more water and fire-proof, they may
be covered outside with a Composition consisting of a mixture of the above described
Cement with an addition of Coal Tar (according to the effect that has to be pro-
duced from 5-30% of Tar to the dry Cement).
The addition of the Tar has a direct disinfecting influence thanks to the Phenol
(Carbolic Acid) contained in it, but it has also an indirect preserving effect by
diminishing the adhesion of water (when raining) and therefore preventing the free
lime of the Cement being washed out. The Tar further communicates to the
painting (Cement and Tar) when thoroughly dry, a certain elasticity because it
slightly softens in a very hot Sun and therefore prevents the Paint from cracking.
On the other hand, the waterproof Cement prevents the Tar when exposed to a
high temperature from getting sticky or running off. The lime in the Cement
prevents the material being attacked by Insects.
Such boards as above described are fireproof to that degree that a soldering flame
of 1000 to 1200 degrees Celsius directed to one side of a board of a thickness of
about inch will show itself on the other side of the board by this place being
converted into Charcoal after an elapse of more than 5 minutes without the board
catching fire.
The above described boards are then nailed or screwed or rivetted or fixed in
some way to wooden or iron posts and rafters to form a Building.
To make it more fireproof iron posts and rafters would be preferred. These
might be chosen in any suitable shape, for instance, rolled = shape girders could
have the Veneer boards or panels prepared as aforesaid secured in the flanges, or
may be fitted to overlap at the ends where rivets are passed through them.
For panelled ceilings of rooms and passages, the panels of various kinds of woods
would be very effective in appearance besides being substantially fireproof.

page_text: 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. The manufacture of a Building material through Veneers being crosswise
glued upon each other, as and in the manner specified.
2. The manufacture of a Building material consisting of Veneers cemented
together with their grains crossing with the aid of a Cement consisting of
a, Caseine or a similar albuminate (85-60%).
b, Hydrate of Lime or a similar alkalic substance (15-40%).
c, So much water that a Cement is produced that may be easily laid on with a
brush with or without addition of insoluble materials, as described.
3. The manufacture of a Building material of Veneers cemented together with
their fibres crossing, as described in Claims 1 and 2, this material to be covered on:
one or on both sides with a Paint consisting of a Cement as described in Claim 2
with an addition of Coal Tar or a similar substance (according to the result to be
achieved 5-30% of the weight of the dry Cement) as described.
4. The construction of Buildings out of these materials by fixing the material
on wooden or iron posts and rafters by the aid of nails, screws, rivets, or any other
means, as described.
Dated this 24th day of September 1891.
Der
R. CORE GARDNER,
Patent Agent, 116 Fleet Street, London.
Agent for the said :-
Christian Wilhelm Luther.