AN IMPROVED MODE OF TREATING OR PREPARING CLAY, LIME, CHALK, AND OTHER MATTERS WITH CARBOLIC ACID TO PRODUCE A DISINFECTANT AND AN INSECT OR VERMIN REPELLER, AND IN APPARATUS FOR THAT PURPOSE,
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by Henry Bradley at the Office of
the Commissioners of Patents, with his Petition, on the 16th
August 1870.-A communication from abroad by Charles Howard
Jackson, of Broadway, New York, in the United States of America.
I, HENRY BRADLEY, of Greenwich, in the County of Kent, do hereby
declare the nature of the said Invention for "AN IMPROVED MODE OF
TREATING OR PREPARING CLAY, LIME, CHALK, AND OTHER MATTERS WITH
CARBOLIC ACID TO PRODUCE A DISINFECTANT AND AN INSECT OR VERMIN
REPELLER, AND IN APPARATUS FOR THAT PURPOSE," a communication from
abroad by Charles Howard Jackson, of Broadway, New York, in the
United States of America, to be as follows:—
་
This Invention consists in a novel and improved mode of impregnating
clay, lime, chalk, or other suitable ingredients, matters, or substances
with carbolic acid in the manufacture of a disinfectant and insect and
vermin repeller.
Carbolic acid in a liquid state has I am aware hitherto been employed
in the manufacture of a disinfectant by saturating materials: therewith;
but this mode has been found unsafe and costly, and the object and
intention of this Invention is to render the manufacture of disinfectants

page_text: from carbolic acid safe and inexpensive, which I propose to effect in the
following manner and by the following means, and process :-
The following is a convenient form of apparatus for producing carbolic
acid and impregnating therewith the material to be used for disinfecting
purposes. A pump to supply to the boiler or furnace the material used
for the production of carbolic acid gas,, a pipe for connecting the said
boiler or furnace with a chamber or retort. I also employ a pressure
gauge and safety valve and a discharge pipe for removing the 'remaining
contents after the operation is completed.
Process of Manufacture.-Heat being applied to. the boiler or furnace,
which should be filled to about two-thirds of its capacity with an
oleaginious product distilled from coal tar at the temperature varying
from three hundred and sixty-nine to four hundred and fifty degrees
Fahrenheit; the vapours of carbolic acid are generated therein, which
pass out of the same through the connecting pipe into the chamber or
retort, which should be filled to about one-third of its capacity with
clay or other suitable substance to be treated. The vapours which are
confined or not allowed to escape from the aforesaid chamber or retort
produce a pressure of from one to five pounds to the square inch, which
forces into and condenses the vapours in the clay, saturating and
impregnating the same with carbolic acid in a very perfect and
efficient manner. When the operation has been continued for a sufficient
length of time the clay or other substance treated is withdrawn and the
chamber again filled with clay or other suitable substance for a sub-
sequent operation. The clay after being thus treated should be reduced
to a powder, which may be. effected by passing it through a mill con-
structed with different sized rollers such as are now employed to
pulverize coarse sugar..
By the above process and means I am enabled to produce carbolic
acid and impregnate clay or other substance employed in the prepara-
tion of the disinfecting powder in a more thorough and economical
manner than can be accomplished by the use of carbolic acid in a liquid
state.