Year: 1887

page_text: Date of Application, 17th Jan., 1887
Complete Left, 15th Oct., 1887
Complete Accepted, 15th Nov., 1887
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The process by which this invention is carried out consists in passing Tar oils
creosote oils, or other such substances into a vessel containing the wood either wet or
partially dry. The vessel which may be of the usual cylindrical form and material is
furnished at the bottom with steam pipes, or with other means of heating the fluid.
The fluid is distributed throughout the lower part of the vessel, by means of a
perforated pipe extending the whole length of the vessel, and placed by preference,
below the steam pipes used for heating the contents of the vessel. The temperature
of the fluid that I find sufficient to extract the water is 212 degrees Fahrenheit but a
few degrees higher, up to 220 degrees Fahrenheit may be employed.
The supply of fluid is continued until it overflows through a series of small pipes
fitted to the upper part of the vessel, which small pipes are connected with a inain
overflow pipe. This pipe carries away the excess of fluid, with such water as is then
extracted; the supply of fluid being continued until the requisite quantity of water
has been extracted, which may be ascertained by taking samples from time to
time, from the overflow pipe, and determining the quantity of water present in the
overflow.
The fluid and water are received from the overflow pipe into a tank also supplied
with steam pipes, by which the contents may be heated, for the purpose of facilitating
the separation of the water that takes place, the fluid that subsides in the lower part
of the tank may be pumped into the vessel first used, or one corresponding thereto, or
it may be passed into the low-level store tank usually employed for emptying the fluid
contained in the vessel at the termination of the operation.
When it is ascertained that sufficient water has been extracted from the wood, a
valve in connection with the overflow pipe may be closed and pressure obtained within
the vessel by continued pumping in of the fluid, or the supply of fluid may be
discontinued, and the pressure obtained by air pump, or other incans.

page_text: The water as extracted from the wood being by this invention removed from the
vessel, the wood at the termination of the operation, is in the presence of fluid free,
or nearly so, from water, and is thus, especially on application of pressure, treated
with a fluid better adapted to effect the preservation of the wood than when such
extraction of the water is not effected.
When the fluid used is of a character that the wood may lose a portion thereof, by
evaporation from the surfaces by being drawn out of the vessel while at tho
temperature stated above, I cool the contents of the vessel to such degree as is
necessary to prevent this loss, either by allowing the whole to remain for several hours,
or by passing a current of cold water through the steam pipes, or by pumping into
the vessel cold fluid similar to that first used.
Wood for use as railway sleepers or other short pieces, are by preference, placed in
the vessel, in an inclined, or upright position.
11 1
T
1005

page_text: COMPLETE SPECIFICATION.
Improvements in Treating Wood with Antiseptic and Preservative
Fluids.
"
I, THOMAS ROYLE formerly of "The Cedars West Ham, but now of Dalton
House, Upton Lane, Forest Gate, E. in the County of Essex, Chemist, 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:
The process by which this invention is carried out consists in passing Tar oils,
creosote oils, or other such substances, which may be previously heated, into a vessel,
covered with a non-conducting composition, containing the wood, either wet, or
partially dry. The vessel, which may be of the usual cylindrical form and material, is
furnished at the bottom, with steam pipes, or with other means of heating the fluid.
The fluid is distributed throughout the lower part of the vessel by means of a perforated
pipe extending the whole length of the vessel and placed, by preference, below the
steam pipes, used for heating the contents of the vessel. The temperature of the fluid
that I find sufficient to extract the water is 212° F., but a few degrees higher, up
to 220° F. may be employed.
The supply of fluid is continued until it overflows through a series of small pipes
fitted to the upper part of the vessel, which small pipes are connected with a main
overflow pipe, this overflow pipe carries away the excess of fluid with such water as is
then extracted, the supply of fluid being continued until the requisite quantity of
water &c. has been extracted, which may be ascertained by taking samples, from time
to time, from the overflow pipe, and determining the quantity of water present in the
overflow.
The fluid and water are received from the overflow pipe, into a tank, also supplied
with steam pipes, by which the contents may be heated, for the purpose of facilitating
the separation of the water that takes place, the fluid that subsides in the lower part
of the tank, may be pumped into the vessel first used, or one corresponding thereto,
or it may be passed into the low-level store tank usually employed for emptying the
fluid contained in the vessel at the termination of the operation.
When it is ascertained that sufficient water has been extracted from the wood, a
valve in connection with the overflow pipe may be closed, and pressure obtained
within the vessel by continued pumping in of the fluid, or, the supply of fluid may be
discontinued, and the pressure obtained by air-pump, or other such means.
The water &c. as extracted from the wood being by this invention removed from
the vessel, the wood at the termination of the operation is in the presence of fluid, free,
or nearly so, from water, and is thus, especially on application of pressure, treated with
a fluid better adapted to effect the preservation of the wood, than when such extraction
of the water is not effected.

page_text: When the fluid used is of such a character that the wood may lose a portion
thereof, by evaporation from the surface by being drawn out of the vessel while at the
temperature stated above, I cool the contents of the vessel to such degree, as is
necessary to prevent this loss either by allowing the whole to remain for several hours,
or by passing a current of cold water through the steam pipes, or by pumping into
the vessel cold fluid similar to that first used.
Railway sleepers, and other short pieces of wood are, by preference, placed in the
vessel in an inclined, or upright position.
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 1
claim is,
1. The process of treating wood for the extraction of water &c. therefrom, by a
continuous current of heated fluid, in a more rapid manner than has hitherto been
done.
2. The construction of apparatus that admits of samples being taken at progressive
stages of the operation.