Year: 1897

page_text: I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of this invention to be as follows:-
This invention relates to an improved method of manufacturing a porous insulating
or separating and covering substance for building and other purposes, its characteristic
feature being that well burnt dolomite is slaked in a highly diluted solution of
hydrochloric acid and converted into a pulp containing chloride of magnesium, to
which moistened cork, peat moor or other light insulating or separating material
is added. After the product obtained has been thoroughly mixed, so that each
constituent particle of the insulating material is encased, as it were, by the lime
of chloride of magnesium, the product is ready to be formed into plates or blocks
and to be subsequently dried. Although the drying by the action of the
atmospheric air is sufficient, it is preferable to subject the product to an artificial
additional drying at a temperature of from 35 to 50 degrees Centigrade, to
ensure that the enclosed particles of the insulating material, for example cork,
may give off their contents of water through the porous lime. It is not until
the inner insulating material has lost its moisture entirely-which when drying
by air alone is employed, may last for months-that the layer of lime hardens
by receiving a glazed appearance and so thoroughly surround the completely dried
insulating material on all sides that the latter is well protected against moisture
and swelling and likewise most efficiently protected from danger of fire.
In order to further increase the porosity and hardness of the material it is suitable
that trass, pumice, silicious sinter or the like be added to the lime pulp containing
the chloride of magnesium. The further procedure then takes place in the manner
described that is to say, the product obtained after the cork, peat moor or the like
having been properly mixed with the lime pulp, is formed directly into blocks or plates.
The said product may also be utilized solely to serve as a coating for the blocks or
plates produced according to the first described manner after the said plates or blocks
have become sufficiently hard.
Blocks or plates of this kind may in addition be provided with a coating of highly

page_text: disintegrated or powdered cork which may or may not be mixed with silicious sinter
and oil varnish, and are in this case especially suitable as wall and floor coverings.
Dated this 13th day of July 1897.
°
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in and relating to the Manufacture of Artificial
Blocks or Plates for Building and other purposes.
I, HENRY HARRIS LAKE, of the Firm of Hazeltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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 relates to an improved method of manufacturing a porous insulating
or separating and covering substance for building and other purposes, its characteristic
feature being that well burnt dolomite is slaked in a highly diluted solution of
hydrochloric acid and converted into a pulp containing chloride of magnesium, to
which moistened cork, peat moss or other light insulating or separating 'material
is added.
After the product obtained has been thoroughly mixed, so that each constituent
particle of the insulating material is encased, as it were, by the pulp of chloride of
magnesium, the product is ready to be formed into plates or blocks and to be
subsequently dried. Although the drying by the action of the atmospheric air is
sufficient, it is preferable to subject the product to an artificial additional drying at a
temperature of from 35 to 50 degrees Centigrade, to ensure that the enclosed particles
of the insulating material, for example cork, may give off their contents of water
through the thin layer of lime. It is not until the inner insulating material has lost
its moisture entirely-which when drying by air alone is employed, may last for
months that the layer of lime hardens by receiving a glazed appearance and so
thoroughly surround the completely dried insulating material on all sides that
the latter is well protected against moisture and swelling and likewise most
efficiently protected from danger of fire.
In order to further increase the porosity and hardness of the material it is suitable
that trass, pumice, kieselguhr or the like be added to the lime pulp containing
the chloride of magnesium. The further procedure then takes place in the manner
described that is to say, the product obtained after the cork, peat moss or the like
having been properly mixed with the lime pulp, is formed directly into blocks or
plates. In addition, the lime pulp may be utilized as a coating for the blocks or
plates produced according to the first described manner after the said plates or blocks
have become sufficiently hard.
Blocks or plates of this kind may in addition be provided with a coating of highly
disintegrated or powdered cork which may or may not be mixed with kieselguhr and
oil varnish, and are in this case especially suitable as wall and floor coverings.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is :-
1. The herein described process which consists in reacting upon calcined
dolomite with a solution of hydrochloric acid, mixing with the pulp or magma so
obtained an organic porous or fibrous substance, forming from the mixture, blocks,

page_text: slabs and the like and expelling the moisture therefrom, for the purpose set
forth.
2. An article of manufacture consisting of an organic porous or fibrous material
and a binding or cementing substance consisting of calcined dolomite reacted upon
with a solution of hydrochloric acid, for the purpose set forth.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.