An Improved Fire-proof Artificial Stone.
Year: 1896

page_text: Date of Application, 17th Nov., 1896-Accepted, 17th Apr., 1897
COMPLETE SPECIFICATION.
An Improved Fire-proof Artificial Stone.
We, ALBERT HENDRIK VAN DER VYGH of Bosboom Toussaint Street 4,
Amsterdam in the Kingdom of Holland, Timber Morohant, HENDRIK VAN DER
NIJGH of Bosboom Toussaint Street 2, Amsterdam aforesaid, Architect, and
GERHARD VAN DER NIJGH of Bosboom Toussaint Street 2, Amsterdamn aforesaid,
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 has for its object an improved fire proof artificial stone which
consists of coke dust, lime, tan, and any ordinary plaster of good quality mixed
together in water, and then, while in a liquid stato, run into suitable moulds wherein
it is allowed to set, after which it is removed therefrom, and is ready for
immediate use.
The various, ingredients are used in about the following proportions, that is
to say,
Coke dust.
Lime
Tan
Ordinary plaster of good quality
And water
abont 32 parts,
about 16 parts,
about 13 parts,
about 21 parts,
18 parts.
We do not however confine ourselves strictly to the foregoing proportions as the
same may be varied by augmenting or decreasing the same pro rata.
The weight of such artificial stone is about 800 kilogrammes to the cubic
metre.
It can be made more cheaply than any other artificial stone, as owing to the
coke dust and tan being waste products, they are obtainable at a comparatively
nominal cost.
Such artificial stone is very easily worked. It can be readily sawn, and nails and
screws may be driven therein as easily as in wood.
It is perfectly fire proof and is particularly adapted for use as wall and ceiling
plates.
It is not affected by wet or frost, as owing to its being perfectly dry it cannot
freeze. It thus allows of building operations being carried on without regard to
season.
When erected it can be stuccoed without being wetted aud in a few days becomes
perfectly dry aud fit for either papering or painting.
It does not harbour insects or vermin, and walls and ceilings constructed therewith
are not only fire proof, but are likewise impervious to heat and cold and are sound
proof.
Convenient dimensions for such plates are about 6 ft. x 2 ft. in size and from
about 1 inches to 4 inches in thickness.
When such plates are used for constructing exterior walls they should be covered
with Portland cement, as by so doing they are rendered more solid and durable,
and practically require no further attention, while they are far cheaper than any
other material.

page_text: Our improved artificial stone is particularly adapted for building fire proof
division walls, as well as external walls, ceilings, ground floors, and vanits, and for
the erection of factories, warehouses, barracks, banks, offices, and other similar
buildings, as well as for ordinary building purposes.
DRAWINGS.
The accompanying sheet of drawings illustrates some suitable forms of moulds
for the manufacture of wall aud ceiling plates in the manner hereinbefore described;
but we wish it to be understood that we make no claim to the saine, as the moulds
or frames may be of any suitable construction and form.
Fig. 1 is a plan and Fig. 2 a longitudinal section of a frame or mould consisting
of two angle irons a, a¹ fastened together by pins b, which are inserted in the ends
of such angle irous as shewn in Figs. 1, and 3, the latter figure being a detail view
to an enlarged scale.
Figure 4 is a plan and Figures 5 and 6, longitudinal and transverse sections of a
frame or mould for ceiling plates consisting of two side pieces c, cl, and two end
pieces d, d, jointed together as shewn in Figs. 4, and 7. The inner and lower
edges of the two side pieces are bovelled as shewn at e, Figs. 4, 6, 7 and 8; (the 'two
latter figures being detail views to an enlarged scale,) so that the corresponding
edges of the plates cast therein are formed to a similar bevel.
Figures 9 and 10 show a plan and longitudinal section of a frame for wall plates
which consists of two angle irons a a' fastened by pins b in the samo manner as
already described with respect to Figs. 1, 2, and 3. The side pieces are perforated
to allow of rods f being inserted as shewn in Fig. 9 which serve to form holes in
the plates which are cast therein.
Figures 11 and 12 shew corresponding views of a similar frame or mould for
casting plates of an increased thickness as indicated by the width of the section
shown at Fig. 12.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what
we claim is :--
As an improved article of manufacture a fire-proof artificial stone composed of
coke dust, lime, tan, and any good ordinary plaster, mixed together in water in
about the respective proportions hereinbefore set forth, and then run into moulds
of any suitable shape and dimensions, wherein it is allowed to set, all substantially
as breinbefore specified.
Dated this Seventeenth day of November 1896.
ELT & Co.,
Registered Patent Agents, Advisers, and Negotiators,
43 Southampton Buildings, London, W.C., Agents for Applicants.