AN IMPROVED COMPOSITION FOR THE PRO-. COMPOSITION FOR THE PROTECTION OF CERTAIN METALLIC SURFACES
Year: 1858

page_text: LETTERS PATENT to Marc Antoine François Mennons, of the British and
Foreign Patent Offices, 39, Rue de l'Echiquier, Paris, in the Empire of
France, for the Invention of "AN IMPROVED COMPOSITION FOR THE PRO-
"
COMPLETE SPECIFICATION filed by the said Marc Antoine François
Mennons at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 27th December 1858, pursuant to the 9th Section.
of the Patent Law Amendment Act 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MARC
ANTOINE FRANÇOIS MENNONS, of the British and Foreign Patent Offices, 39,
Rue de l'Echiquier, Paris, in the Empire of France, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED.
COMPOSITION FOR THE PROTECTION OF CERTAIN METALLIC SURFACES," communi-
cated to me. from a foreigner residing abroad, and have petitioned Her
Majesty to grant unto me, my executors, administrators, and assigns, Her:
Royal Letters Patent for the same, and have made solemn declaration that it
is a communication.
NOW KNOW YE, that I, the said Marc Antoine François Mennons, do
hereby declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the Invention, and the manner
in which the same is to be performed, that to say :-
The Invention communicated to me consists in a combination of certain
organic and inorganic substances, which introduced into boilers and other steam
generators, prevent the agglomeration of the saline constituents of the water

page_text: and their deposit or incrustation on the metallic surfaces with which it is
in contact.
The following ingredients are employed in the preparation of 100 lbs.
weight of this compound :-oak bark, 24 lbs., salts of soda, 31 lbs., wood asb,
15 lbs., soda crystals, 24 lbs., ground linseed, 4 lbs., graphite, 1 lb.
These substances being reduced to powder and thoroughly incorporated, are
laid aside in a dry place; when required for use a given quantity is reduced
to a semi-liquid consistence by hot water, to which is added about 2 lbs. per
cent: of tallow. The mixture is then passed into the generator in the pro-
portion of about oz. avoirdup. (of the powder) per hour for each horse
power. This quantity has been found in a series of trials on the Mediterranean
to be amply sufficient for the complete protection of the surfaces in contact
with the hot water even when the latter had attained a high degree of satu-
ration. The economy of fuel resulting from the absence of saline deposits in
the generators during these trials amounted to 35, 37, and 40 per cent. In
many cases one or several of the ingredients above noted may be replaced by
others of similar character, and the proportions varied according to the nature
of the water. As a general rule for marine boilers, the formula above given
will be found most advantageous.
Having thus described the nature of the said Invention, and the manner of
carrying it into effect, I would repeat that I do not confine myself to the
precise ingredients above enumerated, but reserve the right of replacing one
or more of them by other known substances possessing analogous chemical
properties, and which under many circumstances may be more readily procured
than those given. The proportions of each ingredient may, as I have
observed, also be varied according to the source of the water contained in the
generator; I therefore claim the combination of the substances above noted,
or of others of similar nature, for the preparation of a protective compound,
which added to the water of steam generators, prevents the formation or
agglomeration of the salts held in solution, and the resulting deposits or
incrustations on the surfaces with which it is in contact.
In witness whereof, I, the said Marc Antoine François Mennons, have
hereunto set my hand and seal, this Sixth day of December, in the year
of our Lord One thousand eight hundred and fifty-eight.
M. F. MENNONS. (L.S.)