IMPROVED METHOD OF AND INGREDIENTS FOR IMPREGNATING AND PRESERVING SOFT WOOD AND TIMBER GENERALLY
Year: 1882

page_text: LETTERS PATENT to George James Cross of 95 Casella Road New Cross in
the county of Kent Engineer for an Invention of IMPROVED METHOD OF AND
INGREDIENTS FOR IMPREGNATING AND PRESERVING SOFT WOOD AND TIMBER
GENERALLY
PROVISIONAL SPECIFICATION left by the said George James Cross at the
Office of the Commissioners of Patents on the 21st Juno 1882.
GEORGE JAMES CROSS of 95 Casella Road New Cross in the county of Kent
Engineer IMPROVED METHOD OF AND INGREDIENTS FOR IMPREGNATING AND
PRESERVING SOFT WOOD AND TIMBER GENERALLY
The object of this Invention is an improved method of and ingredients for
impregnating and preserving soft wood and timber generally
For the purpose of my Invention I arrange the wood, cut to shape or otherwise
or timber in logs with the bark removed in a vessel or chamber which is in con-
nection by exhaust pumps to extract the air and sap from the pores or interstices
in the wood I then by other pumps force in a liquid or semi-liquid composed of
asbestos in fine powder with silicate of soda, water or other liquid into the vessel
or chamber until all the pores of the wood are charged therewith and the exterior
conted whereby the wood is rendered non-inflammable and preserved from the
action of white ants and other destructive insects and also from climatic injury.
In some cases silica in powder form, can be mixed with the asbestos powder, before
or during admixture with silicate of soda or other liquid.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George James Cross in the Great Seal Patent Office on tho
21st December 1882.
GEORGE JAMES CROSS of 95 Casella Road, New Cross in the County of Kent,
Engineer IMPROVED METHOD OF AND INGREDIENTS. FOR IMPREGNATING AND
PRESERVING SOFT WOOD AND TIMBER GENERALLY
The object of this Invention is an improved method of and ingredients for
impregnating, coating, and preserving soft wood and timber generally, also fabrics
canvas and other material to which it is applicable.
For the purpose of my Invention I arrange the wood cut to shape or otherwise,
or timber in logs with the bark removed in a vessel or chamber by preference
closed or the chamber may be open at one end so that the wood may project; the
vessel being so arranged as to be fitted pressure tight at that part.
The vessel is in connection by exhaust pumps to extract the air and sap from
the pores or interstices in the wood. I then by other pumps force a liquid or
semi-liquid composed of asbestos in fine powder with silicate of soda or with
cyanite and water or other liquid into the vessel or chamber until all the pores of
the wood or material are charged therewith and the exterior coated whereby the
wood is rendered non-inflammable and preserved from the action of white ants and
other destructive insects and also from climatic injury.
In some cases silica in powdered form can be mixed with the asbestos powder
before and during admixture with silicate of soda cyanite or other liquid.
I have more particularly referred to impregnating wood, but for some material,
such as woven willow to which a coating of size is applied for stiffening purposes,
my ingredients can be mixed with the size or starch whereby the fabric thus
made can be rendered non-inflammable and otherwise preserved.
This coating
may be brushed on any kind of fabric, such as canvas and woven textures or the
fabric may be dipped into the solution and thereby become not only coated on the
two sides but the interstices or meshes will be charged.
For window curtains, bed furniture and other textile goods I purpose brushing
one side only with the composition and then covering that side with a lining
similarly treated so that the colours on the fabric are not interfered with.
Having now described the nature of my said Invention and in what manner the
same is to be performed I declare that I claim :—
The employment of fine powdered asbestos in combination with silicate of soda
or silica in powder or cyanite and a liquid forming a paint or liquid bath for
application to soft wood and other material to render it uninflammable and for
preserving it from climatic decay and from the ravages of white ants as hereinbefore
described.
In witness whereof I the said George James Cross have hereunto set my
hand and seal this Fifteenth day of December in the year of our Lord, One