A Porous and Absorbent Material, chiefly applicable for Tobacco Pipes.
Year: 1893

page_text: Date of Application, 15th Mar., 1893
Complete Specification Left, 14th Dec., 1893-Accepted, 3rd Mar., 1894
PROVISIONAL SPECIFICATION.
A Porous and Absorbent Material, chiefly applicable for Tobacco
Pipes.
I, ALFRED HENRY SMITH of 101 Leadenhall Street London E.C. Asbestos
Merchant do hereby declare the nature of this invention to be as follows:-
Fine pipeclay, or powdered steatite, or a mixture of both, is mixed with water
to the consistency of thin mud. Into this slip is mixed and worked as much
asbestos fibre as it can carry until it forms a thick plastic mass that can be moulded
and shaped into articles of any form. Such articles are then baked in a kiln at a
high temperature and result in being highly refractory or heat resisting &, thanks
to the asbestos fibre, porous, absorbent & at the same time tenacious & not easily
broken.
The porosity can be increased if desired by mixing with the mass in its plastic
state, carbonaceous matter in more or less fine particles, which get burnt out in the
process of firing.
Articles thus formed of such material, in the shape of blocks, hollow vessels, or
any desired form, can be used for filtering purposes; the advantage being that
when foul they can be cleansed & purified by being heated to red heat in a fire,
all impurities being thus burnt & destroyed.
Hence I call this material "Catharopyr" meaning "fire cleansing."
A principal application of this material I claim for the manufacture of tobacco
pipes, & cigar & cigarette holders,-which when saturated with nicotine & foul
from long smoking could be readily & thoroughly purified & cleansed by being
placed in a clear fire or Bunsen gas flame until red hot.
After cooling the article so treated would be as good & clean as when new.
Dated this 14th dox of March 1802
A Porous and Absorbent Material, chiefly applicable for Tobacco
Pipes.
I, ALFRED HENRY SMITH of 101 Leadenhall Street London E.C. Asbestos
Merchant 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 :-
Fine pipeclay, or china clay, or powdered steatite, or a mixture of these or other
refractory earths, is mixed with water to the consistency of thin mud. Into this
slip is mixed & worked as much asbestos fibre as it can carry until it forms a thick
plastic mass that can be moulded and shaped into articles of any form. Such
articles are then dried and baked in a kiln at a high temperature and result in being
highly refractory, or heat resisting, and at the same time porous, absorbent
& tenacious.
The porosity can be increased if desired by mixing with the mass in its plastic
state carbonaceous matter in more or less fine particles which get burnt out in the
process of firing.

page_text: Articles thus formed of such material, in the shape of blocks, hollow vessels, or
any desired form, can be used for filtering purposes, the advantage being that
when foul they can be cleansed & purified by being heated in a fire until all
impurities are burnt & destroyed.
Hence I call this material "Catharopyr" meaning "fire cleansing."
A principal application of this material I claim for the manufacture of tobacco
pipes & cigar & cigarette holders, which when saturated with nicotine & foul from
long smoking could be readily & thoroughly purified & cleansed by being placed
in a clear fire or a Bunsen gas flame.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The application of asbestos fibre, cemented with pipeclay or other refractory
mineral matter for the manufacture of articles, chiefly tobacco pipes, & cigar &
cigarette holders, and filters; that can be cleansed and purified by fire.
Dated this 14th day of December 1893.