Improvements in the Treatment of wood.
Year: 1895

page_text: Date of Application, 26th Oct., 1895
Complete Specification Left, 10th June, 1896-Accepted, 1st Aug., 1896
Improvements in the Treatment of wood.
We, COUNT ADOLPHE DE SAINTE-MARIE and ANTOINE ALFRED HOFFMANN, both
of 95 Boulevard Beaumarchais, Paris, in the Republic of France, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improved process which permits of rapidly stopping
the shrinkage which wood slowly undergoes when drying in the air. We obtain this
result by immersing the wood into different liquids, the temperature of which can be
raised up to 100 degrees Centigrade or more, in the open air or in air under
pressure.
Different salts such as calcium chloride, magnesium chloride, the alkaline
nitrates and acetates in solution may be advantageously used for constituting
the baths.
Among the organic substances, capable of being utilised for constituting these
baths, paraffin, the heavy oils of petroleum and the like, may for instance be
employed.
As a practical example we will quote the bath of a solution of chloride of
calcium in 100 parts of water, the temperature of which bath can be progressively
raised to any desired temperature between 100 and 170 degrees Centigrade.
The operation takes place in the following manner :
Into a vessel or bath of sheet or cast iron, enclosing the saline solution the wood to be
treated is immersed in the shape of suitable boards or blocks and is kept at the
temperature of 120 degrees C., for example during a lapse of time varying from
between three quarters of an hour to three hours, according to the nature of the
wood, its thickness and the result required to be obtained.
The wood subjected to this action loses water, diminishes consequently in weight
and undergoes a shrinkage. When thus treated only the external part of the wood
is impregnated with the salt contained in the solution. This layer of salt is removed,
either by immersing the wood into cold or boiling water for a sufficient time, or by
removing the superficial layer by the aid of any suitable instrument.
Dated this 26th day of October 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.
Improvements in the Treatment of Wood.
We, COUNT ADOLPHE DE SAINTE-MARIE, and ANTOINE ALFRED HOFFMANN both
of 95 Boulevard Beaumarchais, Paris, in the Republic of France, 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 process which permits of rapidly stopping
the shrinkage which wood slowly undergoes when drying in the air. We obtain this

page_text: result by immersing the wood into different liquids, the temperature of which can
be raised to 100 degrees (entigrade or more, in the open air or in air under
pressure.
Different salts such as calcium chloride, magnesium chloride, the alkaline
nitrates and acetates in solution may be advantageously used for constituting
the baths.
Among the organic substances capable of being utilised for constituting these
baths, paraffine, the heavy oils of petroleum and the like, may for instance be
employed.
As a practical example we will quote the bath of a solution of chloride of calcium
in 100 parts of water, the temperature of which bath can be progressively raised to
any desired temperature between 100 and 170 degrees Centigrade.
The operation takes place in the following manner :
Into a vessel or bath of sheet or cast iron, enclosing the saline solution the wood to be
treated is immersed in the shape of suitable boards or blocks and is kept at the
temperature of 120 degrees C., for example during a period of time varying from
between three quarters of an hour to three hours, according to the nature of the
wood, its thickness and the result required to be obtained.
The wood subjected to this action loses water, diminishes consequently in weight
and undergoes a shrinkage. When thus treated only the external part of the wood
is impregnated with the salt contained in the solution. This layer of salt is removed,
either by immersing the wood into cold or boiling water for a sufficient time, or by
removing the superficial layer by the aid of any suitable instrument.
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 :-
The process, hereinbefore described, allowing of rapidly stopping the shrinkage
which wood slowly undergoes when exposed to dry air, this process consisting in
immersing the wood for a variable period of time in a saline solution or in any other
liquid, capable of being heated to a temperature of 100 degrees Centigrade or to a
higher temperature, this operation being either effected in the open air or under
pressure in a closed vessel.
Dated this 11th day of June 1896
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicants.