A Steam Generator and Superheater.
Year: 1893

page_text: Date of Application, 1st June, 1893
Complete Specification Left, 28th Feb., 1894-Accepted, 5th May, 1894
PROVISIONAL SPECIFICATION.
A Steam Generator and Superheater.
I, JEAN BONICARD of 37 Rue Bouret, Paris, France, Mechanician, do hereby
declare the nature of this invention to be as follows:-
My invention consists of a steam generator and superheater the characteristic
feature of which is that a superheating chamber or drum is situated in the furnace
or fire place and is heated directly by the furnace gases which circulate in an
annular space between the superheating chamber and an outer drum, the position
of the opening into this space being capable of regulation so as to control the
action of the gases on the said chamber and raise or lower the steam pressure as
required.
For the purpose of my invention I construct a boiler with an upper and a lower
chamber connected together by tubes. The lower chamber constitutes the water
chamber and the upper chamber the steam chamber or dome. The flame, smoke
and gases from the furnace traverse the lower chamber by means of passages
therethrough, circulate around the water tubes and pass off at the upper part into
a flue or chimney. A very rapid evaporation of the water is thus effected.
steam from the upper chamber is conveyed by a pipe to the superheater in the
furnace and from this superheater the steam is conveyed to the engine or
otherwise.
The
The superheater consists of a chamber or drum closed except for the steam inlet
and outlet pipes. It is surrounded by a cylinder of such dimensions as to leave
an annular space around the chamber. The cylinder has a longitudinal opening
through which the gases enter the annular space. The position of the opening can
be regulated as desired by giving an axial movement to the cylinder by means of a
hand wheel or otherwise 80 as to expose it more or less to the flame.
temperature and consequently the pressure of the superheated steam can thus be
regulated as required.
The
The pipe communicating between the boiler and the superheater has a valve to
prevent the return of the steam. There is a supplementary pipe fitted with a
valve for establishing temporary communication between the superheater and the
boiler in order to allow any steam which may form in the superheater at starting
to pass to the steam chamber.
The generator can be arranged vertically or horizontally.
11.
T
1000
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE SPECIFICATION.
A Steam Generator and Superheater.
I, JEAN BONICARD of 37 Rue Bouret, Paris, France, Mechanician, do hereby
declare the nature of this invention and in what manner the same is to be
0 performed, to be particularly described and ascertained in and by the following
statement:—
My invention consists of a steam generator and superheater, the characteristic
feature of which is that a superheating chamber or drum is situated in the furnace

page_text: or fire place and is heated directly by the furnace gases which circulate in an
annular space between the superheating chamber and an outer drum, the position
of the opening into this space being capable of regulation so as to control the
action of the gases on the said chamber, and raise or lower the steam pressure as
required.
For the purpose of my invention I construct a boiler with an upper chamber and
a lower chamber connected together by water tubes. The lower chamber constitutes
the water chamber and the upper chamber the steam chamber or dome. The flame,
smoke and gases from the furnace traverse the lower chamber by means of passages
therethrough, circulate around the water tubes and pass off at the upper part into
a flue or chimney. A very rapid evaporation of the water is thus effected. The
steam from the upper chamber is conveyed by a pipe to the superheater in the
furnace and from this superheater the steam is conveyed to the engine or
otherwise.
The superheater consists of a chamber or drum closed except for the steam inlet
and outlet pipes. It is surrounded by a cylinder of such dimensions as to leave an
annular space around the chamber. The cylinder has a longitudinal opening
through which the gases enter the annular space. The position of the opening can
be regulated as desired by giving an axial movement to the cylinder by means of
a hand wheel or otherwise so as to expose it more or less to the flame. The
temperature and consequently the pressure of the superheated steam can thus be
regulated as required.
The pipe communicating between the boiler and the superheater has a valve to
prevent the return of the steam. There is a supplementary pipe fitted with a valve
for establishing temporary communication between the superheater and the boiler
in order to allow any steam which may form in the superheater at starting to pass
to the steam chamber.
The generator can be arranged vertically or horizontally.
Figures 1 and 2 of the accompanying drawings represent a steam generator and
superheater constructed in accordance with my invention, Figure 1 being a section
on the line A, B of Figure 2, and Figure 2 an elevation partly in section on the
line C, D of Figure 1.
The
The boiler comprises the lower and upper chambers A and B connected together
by tubes T. The lower chamber A constitutes the water chamber and the upper
chamber B the steam chamber or dome. F represents the fire bars. E E are
passages through the lower chamber A through which the flame, smoke and gases
pass; these circulate around the water tubes T and pass off at the upper part into
the flue or chimney X. D is the steam outlet, G is a pipe leading from the
outlet D to a superheater K in the furnace. L is a pipe leading from this super-
heater to the engine or other place where the steam is to be utilized.
superheater shown in Figures 1 and 2 consists of a chamber or drum K closed
except at its steam inlet and outlet which are connected respectively with the
pipes G and L. The chamber K is surrounded by a cylinder M of such dimensions
that there is an annular space between the two. The cylinder M has a longitudinal
opening through which the gases enter the annular space. The position of the
opening can be regulated as desired by giving an axial movement to the
cylinder M so as to bring the opening O more or less over the flame. In order to
provide for this axial movement the cylinder M has two tubes t t fitting over the
pipes G and L respectively and one of these tubes is fitted with a hand wheel P.
z is a valve in the pipe G to prevent return of the steam. Q is a supplementary
pipe fitted with a valve R for establishing temporary communication between the
superheater and the boiler in order to allow any steam which may form in the
superheater at starting to pass to the chamber or dome B.
Figures 3 and 4 represent a modification in which the superheater, instead of
being in the form of a drum as in Figures 1 and 2, is composed of three parallel
tubes K K K communicating with each other; the steam pipe G is connected to
one end of the tube K, the other end of this tube is connected with one end of the

page_text: tube K' whose other end is connected with one end of the tube K', the other end of
this being in its turn connected with the pipe L.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A steam generator and superheater having a superheating chamber directly above
the fire place and heated directly by the furnace gases circulating in a space formed
by a cylinder or outer chamber around the superheating chamber, the opening into
this space being capable of control so as to regulate the action of the gases upon
the superheating chamber, and consequently the pressure of the steam, substantially
as hereinbefore described.
Dated this 28th day of February 1894
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.