CERTAIN IMPROVEMENTS IN PREVENTING INCRUSTATION IN BOILERS
Year: 1857

page_text: LETTERS PATENT to Guillaume Defis, of Marseille, France, and 4, South
Street, Finsbury, London, for the Invention of "CERTAIN IMPROVEMENTS
IN PREVENTING INCRUSTATION IN BOILERS."
Sealed the 22nd December 1857, and dated the 16th July 1857.
PROVISIONAL SPECIFICATION left by the said Guillaume Defis at the
Office of the Commissioners of Patents, with his Petition, on the
16th July 1857.
I, GUILLAUME DEFIS, of Marseille, France, and 4, South Street, Finsbury,
London, do hereby declare the nature of my said Invention of "CERTAIN
IMPROVEMENTS IN PREVENTING INCRUSTATION IN BOILERS," to be as follows,
that is to say:-
My Invention consists in employing certain agents which by their action
not only prevent incrustations to be formed in boilers, but destroy any incrus-
tation previously formed, and in the application of an arrangement of apparatus
to the boilers for facilitating the introduction of the said agents.
The following are the names of the agents and the proportions suitable for
a boiler of two hundred horse-power, sufficient for about one month's service.
Crystallized salt of soda
about 60 lbs.

page_text: Ashes of pine wood
Ashes of walnut wood
Soot
Linseed cakes
Tannin
Tallow
Flour of sulphur
about 20 lbs.
60"
"
10
"
"
"
20"
.
60"
20
"
"
4 "
In addition to the above ingredients, volatile ammonia may also be cm-
ployed to remove incrustations already found in boilers.
I mix the above agents with sea water into a paste, and introduce it into
one or more boilers by means of an apparatus which consists of a funnel,
through which the paste enters a box provided with slides, whence it passes
into a receiver, to which are fixed one or more pipes for conducting it into the
boiler or boilers. Each pipe is provided with a tap for regulating the intro-
duction of the paste; another pipe serves for employing the pressure of the
steam to facilitate the feeding of the mixture.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Guillaume Defis in the Great Seal Patent Office on the
14th January 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GUILLAUME
DEFIS, of Marseille, France, and 4, South Street, Finsbury, London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of July, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twenty-first year of Her
reign, did, for Herself, Her beirs and successors, givo and grant unto
me, tho said Guillaume Defis, Her special license that I, the said Guillaume
Defis, my executors, administrators, and assigns, or such others as I, the
said Guillaume Defis, my exccutors, administrators, and assigns, should at any
time agreo with, and no others, from time to time and at all times there-
after during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention of "CERTAIN
IMPROVEMENTS IN PREVENTING INCRUSTATION IN BOILERS," upon the condition
(amongst others) that I, the said Guillaume Defis, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their hands

page_text: and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Guillaume Defis, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the accompanying Sheet of Drawings,
that is to say:-
The Invention consists in employing certain agents in suitable proportions
to prevent the formation of incrustations in marine steam-engine boilers, and
in the application of an apparatus for facilitating the introduction of the said
gents into the boiler or boilers, The agents are as follows, and should be
ixed in the following relative proportions, viz¹: _
The Invention consists in employing certain agents in suitable proportions
o prevent the formation of incrustations in marine steam-engine boilers, and
the application of an apparatus for facilitating the introduction of the said
gents into the boiler or boilers, The agents are as follows, and should be
nived in the following relative proportions, viz¹ :-
Crystallized salt of soda
Potass
Plumbagine
about sixty-six
"
forty-four
9
Black rosin
Vine branch ashes
Pine wood
99
13
"
"
twenty-two
twenty-two
sixty-six
Avoirdupois
pounds.
"
59
"
99
twenty-two
"
"
"
sixty-six
cleven
"
"
Walnut
Soot
Linseed cakes
Tannin
Tallow
Flour of sulphur
"
twenty-two
"
"
sixty-six
"
"
twenty-two
"
four and a half
"
"
The substances are reduced to a state of fine powder, and made into a
liquid paste by mixture with sea water, about a quarter of a pound of this
paste per horse-power is afterwards placed in the apparatus herein-after
lescribed, to be introduced into the boiler.
The quantities above stated will suffice for the supply of a marine steam-
engine boiler of two hundred horse-power for about ten days. When tho
water in the boiler acquires a density of about twelve degrees (Beaumés
arcometer), the contents must be drawn off by the ordinary process, and the
same quantity of paste, composed as herein-before described, must again bo
supplied to the boiler, together with the necessary quantity of water. When
operating on boilers which are foul (viz', in which incrustations already exist),
after the addition of the above paste, volatile ammonia is added in the propor-

page_text: tion of about one and three-quarters of a pint per one hundred horse-power;
this application should be made a few days after the ship has left the port, and
when the valves are open.
Description of the apparatus for the introduction of the paste and ammonir
.into the boiler. The Drawing shews the application of the apparatus to two
steam boilers A, A, provided with a chimney; B, funnel for passing the liquid
-paste into the receiver D, provided with a double slide valve C; E, pipe for
the passage of steam into the receiver D, which forces the paste or ammonia
through the tubes G, HI, K, and M, M, to the bottom of the boilers.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I wish it to be understood that I do not confine
myself to the precise agents or proportions thereof, reserving to myself the
right of modifying the same; what I claim is,-
First, the employment of the above-named substances in a state of paste for
preventing the formation of incrustations in marine steam-engine boilers, as
herein-before described. .
Secondly, the employment of volatile ammonia in conjunction with the said
paste when operating on boilers which are foul, as herein-before described.
Thirdly, the construction and application of an apparatus for the introduc-
tion of the said substances, as herein-before described and referred to in the
annexed Drawing.
In witness whereof, I, the said Guillaume Defis, have hereunto set
my hand and seal, this Fourth day of January, One thousand eight
hundred and fifty-eight.
GUE DEFIS
GUE DEFIS (0)