IMPROVEMENTS IN STEAM GENERATORS STEAM GENERATORS
Year: 1866

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and Foreign
Patent Offices, 24, Rue du Mont Thabor, Paris, in the Empire of
France, and 88, Porchester Terrace, Bayswater, in the County of
Middlesex, Patent Agent, for the Invention of "IMPROVEMENTS IN STEAM
GENERATORS."A communication from Henry Petitpierre, residing at
Batignolles, in the Empire of France.
PROVISIONAL SPECIFICATION left by the said Henri Adrien Bonneville
at the Office of the Commissioners of Patents, with his Petition, on
the 26th July 1866.
I, HENRI ADRIEN BONNEVILLE, of the British and Foreign Patent Offices,
24, Rue du Mont Thabor, Paris, in the Empire of France, and 38, Porchester
Terrace, Bayswater, in the County of Middlesex, Patent Agent, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN STEAM
GENERATORS," a communication from Henry Petitpierre, a person residing at
Batignolles, in the Empire of France, aforesaid, to be as follows:-
My Invention relates to a tube or recipient placed in the fire-box between
the generator and the cylinder which works the piston, by means of which a

page_text: greater volume of steam is obtained, as also a notable reduction in the
expenditure of fuel.
The apparatus employed consists merely in a tube or recipient by means
of which the water borue, off with the steam becomes more completely
vaporised in its passage through this tube from the generator to the cylinder.
The steam pipe which connects the generator with the tube or recipient in the
fire-box is furnished with a clack valve which allows the steam to go out, but
which effectually prevents its return into the steam chamber of the generator,
when the pressure increases by the distension of the vapor in the tube.
need only add that this Invention is applicable to any ordinary generator of
whatever kind soever it may be.
I
SPECIFICATION filed in pursuance of the conditions of the Letters Patent,
and of an Order of the Lord Chancellor, by the said Henri Adrien
Bonneville in the Great Seal Patent Office, on the 5th February 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRI
ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 24, Rue du
Mont Thabor, Paris, in the Empire of France, and 38, Porchester Terrace,
Bayswater, in the County of Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of July, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Henri Adrien Bonneville, Her special licence that I, the said Henri
Adrien Bonneville, my executors, administrators, and assigns, should in
any time agree with, and no others, from time to time and at all times
thereafter 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 for "In-
PROVEMENTS IN STEAM GENERATORS," a communication from Henry Petitpierre,
a person residing at Batignolles, in the Empire of France, aforesaid,
upon the condition (amongst others) that I, the said Henri Adrien Bonne-
ville, my executors or administrators, by an instrument in writing under
my, or their, or one of their hands 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

page_text: 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 Henri Adrien Bonneville, 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:-
My Invention relates to a tube or recipient placed in the fire-box between
the generator and the cylinder which works the piston, by means of which a
greater volume of steam is obtained, as also a notable reduction in the
expenditure of fuel.
The apparatus employed consists merely in a tube or recipient, by means
of which the water borne off with the steam becomes more completely
vaporised in its passage through this tube from the generator to the cylinder.
The steam pipe which connects the generator with the tube or recipient in
the fire-box is furnished with a clack valve which allows the steam to flow
into the cylinder, but which effectually prevents its return into the steam
chamber of the generator, when the pressure increases by the distension of
the vapor in the tube. I need only add that this Invention is applicable to
any ordinary generator of whatever kind soever it may be.
As may
be inferred from what precedes, the apparatus increasing the volume
of steam, which constitutes my improvement in steam generators, relates not
to the overheating of the steam but to the more effectual vaporisation of
the great quantity of water, estimated at more than fifty per cent., borne off
in the generators now used.
Although the above explanations can leave no doubt in the mind with
regard to this, I wish it to be clearly understood that I do not claim the over-
heating of the steam, but the more thorough vaporisation of the water by
means of my apparatus. The said apparatus is represented as being applied
to a steam-boiler generator in the accompanying Drawings, in which Figure 1
is a longitudinal side view, partly a section, of the said generator; and
Figure 2 a tranversal section of the same near the fire-bridge.
In these Figures A is the pipe conveying the steam to the apparatus
increasing the volume of the steam; B is the apparatus by means of which
this augmentation in the volume of the steam is effected; C is the valve
which prevents the well-nigh waterless or anhydrous steam, the volume of
which is augmented, from returning to the steam chamber; D is the safety
valve of the apparatus;. E is the pipe conveying the anhydrous steam to the
steam cylinder or to such other apparatus as may be required. Although
the form and arrangement of certain parts differ in different generators, still

page_text: the principle of my Invention remains the same, that is to say, the interposition
of my steam increasing apparatus placed in the fire-place between the
generator and the cylinder, or all other such apparatus where steam is
utilised. In these Figures the apparatus through which passes the steam
coming from the boiler is placed above the grate of the generator and at the
bottom of the fire-place. By this arrangement a small apparatus may be
employed capable of receiving a sufficient quantity of heat to vaporise
thoroughly the water carried off by the steam. The valve preventing any
anhydrous steam returning to the cylinder is always placed on the steam
pipe between the generator and the steam increasing apparatus, the safety
valve on the instant the machine stops allows the small quantity of steam
contained in the apparatus to flow out. The size is determined according
to the power of the generator to render the steam anyhydrous without
however raising its temperature, that is to say, that the steam furnished by
the steam increasing apparatus bas exactly the same temperature as that
coming immediately out of the boiler. Under these conditions there is no
fear any of the parts of the machine becoming impaired, as there is no over-
heating of the steam as above stated, but only an instant vaporisation in the
apparatus of the enormous quantity of water carried away,
which vaporisation
more than doubles the amount of steam produced. The constant flowing of
the steam inside the steam increasing apparatus, preserves it from damage,
so that it lasts as long as a steam boiler. This simple apparatus is applied
to all the different kinds of generators, without modifying at all their arrange-
ments. The placing of it is easily and rapidly effected, so that it occasions
no interruption in the working of a factory. By adopting this steam increasing
apparatus, the following advantages are obtained :-
1°. The saving of more than fifty per cent. of fuel.
2°. The saving of more than fifty per cent. of water.
3º. The need of boilers only half the size of those now used to obtain the
same result, or the increase of the power of insufficient generators.
4°. The use of anhydrous steam giving a more regular working and a
notable increase of force.
5°. The smoke almost entirely consumed.
Having now described the nature of my Invention, and the manner of
carrying the same into effect, I wish it to be understood that I do not restrict
myself precisely to the details of the application above given as an example,
as the applications of my Invention admit of variation without departing from
the principle thereof, but what I claim is, the interposition between the
generator of the steam boiler and the cylinder, or the various machines to

page_text: which steam is applied of an apparatus, tube, or any other analogous recipient
in the fire-place in front or behind the fire bridge.
In witness whereof, I, the said Henri Adrien Bonneville, have hereunto
set my band and seal, this Twenty-fourth day of January, in the year
of our Lord One thousand eight hundred and sixty-seven.
H. BONNEVILLE. (LS.)