IMPROVE- MENTS IN THE PREVENTION OR REMOVAL OF INCRUSTATION IN OR FROM STEAM GENERATORS, AND IN THE APPARATUS EMPLOYED THEREIN
Year: 1862

page_text: ETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, and of 166, Buchanan Street, in the City
of Glasgow, North Britain, Gentleman, for the Invention of "IMPROVE-
MENTS IN THE PREVENTION OR REMOVAL OF INCRUSTATION IN OR FROM
STEAM GENERATORS, AND IN THE APPARATUS EMPLOYED THEREIN."-A com-
munication from abroad by Stanislas Michel Lecacheux and Bernard
Sartre, both of Marseilles, in the Empire of France.
Sealed the 22nd April 1862, and dated the 25th January 1862.
COMPLETE SPECIFICATION filed by the said John Henry Johnson at
the Office of the Commissioners of Patents, with his Petition and Decla-
ration, on the 25th January 1862, pursuant to the 9th Section of the
Patent Law Amendment Act 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
and of 166, Buchanan Street, in the City of Glasgow, North Britain,
Gentleman, send greeting.
WHEREAS I have this day presented my Petition to Her most Excellent
Majesty Queen Victoria, for a grant to me, my executors, administrators,
and assigns, in respect of an Invention for "IMPROVEMENTS IN THE PREVENTION
OR REMOVAL OF INCRUSTATION IN OR FROM STEAM GENERATORS, AND IN THE APPA-

page_text: RATUS EMPLOYED THEREIN,
"
a communication from abroad by Stanislas Michel
Lecacheux and Bernard Sartre, both of Marseilles, in the Empire of France.
NOW KNOW YE, that I, the said John Henry Johnson, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Drawings, and
to the letters and figures marked thereon, that is to say :-
The said Invention relates to an improved mode of removing and pre-
venting calcareous deposits in the interior of steam generators or boilers,
and consists in the employment for that purpose of a peculiar liquid, the
effect of which when introduced into the boiler, is to prevent incrustation
therein, and to destroy the adhesion of the calcareous deposit (when formed)
with itself, and with the sides of the boiler. It is proposed to inject the
peculiar liquid above referred to, and herein-before described, into the interior
of the boiler by the aid of the appliances illustrated on the annexed Sheet of
Drawings, which represents a transverse vertical section of an ordinary marine
boiler, with the peculiar injecting apparatus in connection therewith, such
apparatus being also applicable to the injection of other descriptions of liquids
into steam generators for the same object. This peculiar liquid is composed
of eight parts by weight of potash of commerce or carbonate of potash, and
from two to eight parts by weight of molasses, added to one hundred parts by
weight of snail or slug liquor. These proportions give the best result, but they
may be varied slightly if desired; the ingredients above mentioned are to be
boiled together for about two hours, and then strained off, when the resulting
liquor will be fit for use.
In the annexed Drawing, A represents an air cock for the escape of the
air contained within the closed vessel or reservoir V, and B is a cock for ad-
mitting the liquid therein; C, D, are two other cocks for distributing the
liquid into the boiler through the pipe G; E is a cup or filler communicating
through the cock B, with the vessel or reservoir V. When it is desired to
inject this liquid into the boiler, the cocks C and D are closed, and the air
cock A opened, to allow of the escape of the air from the vessel V; the cock B
is also opened to allow the liquid to enter the reservoir from the cup or
filler E; when the reservoir V has been supplied with a sufficient quantity
of liquid, the air or vent cock A and supply cock B are closed, and the
injection cocks C and D are opened, whereupon the liquid will be injected into
the boiler through the pipe G, by reason of the steam pressure exerted thereon
through the steam pipe F, which is in direct communication with the upper
part of the boiler.

page_text: Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried
into effect, I would observe in conclusion, that what I consider to be novel.
and original, and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent, is,-
First, the application and use, for the prevention or removal of incrustation
or calcareous deposit in steam generators or boilers, of a liquid composed
of potash of commerce (carbonate of potash), molasses, and snail or slug liquor,
as herein-before.
Second, the peculiar apparatus for injecting liquids into steam generators,
with a view to the prevention or removal of deposit therein, as herein-before
described.
In witness whereof, I, the said John Henry Johnson, have hereunto
set my hand and seal, this Twenty-fifth day of January, One thousand
eight hundred and sixty-two.
J. HENRY JOHNSON. (L.S.)