Year: 1887

page_text: Date of Application, 3rd June, 1887
Complete Left, 23rd Feb., 1888
Complete Accepted, 29th Mar., 1888
I, JAMES STEVENSON of Grays Inn Chambers, 20 High Holborn, London W.C.,
Civil Engineer and Patent Agent do hereby declare the nature of this invention to
be as follows:-
My Invention consists in the application of a new process for giving the consistency
and hardness special to the butt end of old tree stems which have been reiniferous for
some time, to fir or pine woods.
In general fir and pine woods in their natural state contain resinous and other
matters, which preserve them from decay, notwithstanding they may be exposed to the
action of damp or even be in water. Now with a view to impart the above referred
to properties, which exist, in the remaining or butt end of old trees, to fir or pine
woods to be used for general industrial purposes, I prepare a liquid composition to
serve as an injection.
All the necessary elements to accomplish the desired purpose are contained in
what is known as oil of Rosin, with the exception of essence of turpentine, and
which latter may be compensated for by the introduction or addition of a little wood
tar (generally known in Commerce as Stockholm tar) which will suffico to impart to
the cut wood the full normal resinous and other properties possessed by or adherent to
the old tree stems above referred to.
The injection composition in accordance with my Invention is composed of ten
parts of tho tar aforesaid and ninety parts of oil of Rosin, but in order to give the
composition more consistency, a little Colophony (dry Rosin) may be advantageously
added and the quantity of oil of Rosin be proportionately decreased. In order that
the injection composition may more readily penetrate the wood, it is slightly heated.
The oil of Rosin and the tar may be employed alone, separately, or amalgamated, or

page_text: .
the two may be mixed with the Colophony or other similar resinous substance. The
treatment of woods by the injection of such a composition effectually closes all tho
pores of the wood and protects it from decaying.
The process in accordance with my Invention is applicable to sleepers, telegraph
poles, pickets, Vine props, pile work, timber used for hydraulic works and to all
woods intended to be placed under water or in the ground. Pavement consisting of
blocks or slabs of wood which have been subjected to the treatment above described,
is not slippery and is not affected by frost. Also, by varying the quantity of the
liquid ingredients injected, different coloured woods are obtained which may be
employed to produce mosaic or tesselated arrangements or devices.
Dated this 1st June 1887
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.

page_text: 1, JAMES STEVENSON, of Grays Inn Chambers, 20 High Holborn, London W.C.,
Civil Engineer and Patent Agent, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My Invention consists in the application of a new process for giving the consistency
and hardness to fir or pine woods, special to the butt end of old tree stems which have
been resiniferous for some time.
In general, fir and pine woods in their natural state, contain resinous and other
matters which preserve them from decay notwithstanding they may be exposed to
the action of damp, or even be immersed in water.-Now, with a view to impart the
above referred to properties-which exist in the remaining or butt end of old trees-
to fir or pine woods to be used for general industrial purposes, I prepare a liquid
composition to serve as an injection. All the necessary elements to accomplish the
desired purpose are contained in what is known as oil of resin with the exception of
essence of turpentine, and which latter may be compensated for by the introduction
or addition of a little wood tar (generally known in commerce as Stockholm tar)
which will suffice to impart to the cut wood the full normal resinous and other
properties possessed by old tree stems as above stated.
The injection composition in accordance with my Invention is composed of ten parts
of the tar aforesaid and ninety parts of oil of resin, but in order to give the com-
position more consistency a little Colophony (dry resin) may be advantageously added
and the quantity of oil of resin be proportionately decreased. In order that the
injection composition may more readily penetrate the wood same is slightly heated.
The oil of resin and the tar may be employed alone, separately, or amalgamated, or
the two may be mixed with the Colophony or other suitable resinous substance.
The treatment of woods by the injection of a composition as above described,
effectually closes all the pores of the wood and protects it from decaying.-The process
in accordance with my Invention is applicable to sleepers, telegraph poles, pickets, vine
props, pile work, timber used for hydraulic works, and to all woods intended to be
placed under water or in the ground.-Pavement consisting of blocks or slabs of wood
which have been subjected to the treatment above described, is not slippery and is not
affected by frost. Also, by varying the quantity of the liquid ingredients injected,
different coloured woods are obtained which may be employed to produce mosaic or
tesselated arrangements or devices.

page_text: Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what I
claim is :-
The process substantially as herein described whereby I am enabled to give to
ordinary fir or pine woods-as used generally for industrial purposes and especially 5
when required to withstand the action of moisture-that consistency and hardness
which is special to the lower or butt ends of tree stems owing to the resiniferous
properties possessed by the latter.