Improvements in and connected with Steam Boiler Furnaces . and the like..
Year: 1899

page_text: Date of Application, 6th May, 1899
Complete Specification Left, 6th Feb., 1900-Accepted, 10th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in and connected with Steam Boiler Furnaces
.
and the like..
I, EDWARD JAMES FRY, of 13, Old Paradise Street, Lambeth, in the County of
Surrey, Engine Driver do hereby declare the nature of this invention to be as
follows:
The improvements forming the subject of this invention have for their object
the promotion of economy in the consumption of fuel and the prevention of smoke
in the furnaces and flues of steam boilers and the like and the said improvements
are more especially applicable to furnaces of the Cornish or Lancashire type of
boiler.
. .
.
In applying my invention to a Cornish boiler for example I provide in the
boiler flue at a point behind the bridge of the furnace a wall or mass of brick-
work, or fire-blocks, so laid or constructed as to form a series of more or less
sinuous or indirect passages for the products of combustion on their way from
the furnace to the chimney. This wall or mass of brick-work or fire-blocks is
made to occupy any convenient position in the said flue and any desired propor-
tion of its length and diameter according to circumstances. Steam' may be con-
ducted by a pipe from the front of the boiler, under the furnace-bars to the
space between the furnace bridge and the beforementioned wall or mass of brick-
work, and I prefer to surround this steam-blast pipe by a larger pipe one end
of which opens into the said space behind the furnace bridge, and the other end
terminates in the front part of the boiler and is furnished with a cap or cover
adapted to be opened and closed by hand, or to be opened by action of furnace
door and closed by hand.
COMPLETE SPECIFICATION.
Improvements in and connected with Steam Boiler Furnaces
and the like.
I, EDWARD JAMES FRY, of 13, Old Paradise Street, Lambeth, in the County of
Surrey, Engine Driver, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The improvements forming the subject of this invention have for their object
the promotion of economy in the consumption of fuel and the prevention of smoke

page_text: in the furnaces and flues of steam boilers and, the like and the said improvements
are more especially applicable to furnaces of the Cornish or Lancashire type of
boiler.
In applying my invention to a Cornish or Lancashire boiler for example, I
provide in the boiler flue at a point behind the bridge of the furnace a wall or mass
of brickwork, or fire-blocks, so laid or constructed as to form a series of more or
less sinuous or indirect passages for the products of combustion on their way from
the furnace to the chimney: illustrates the application of my invention to the
The accompanying drawing
furnaces of a boiler of the Lancashire type. Figure 1 is a front elevation of
the boiler; Figure 2-a partial. longitudinal vertical section on line -x of
Figure 1; Figure 3 a partial horizontal section on line y-y of Figure 1; and
Figure 4 is a vertical section through the flue on line of Figure 2.
Similar letters relate to like parts in all the figures of the drawings.
a is the furnace which is of ordinary construction, b is the furnace bridge, and
is the wall or mass of brickwork, or fire-blocks, forming the sinuous or indirect
passages hereinbefore referred to for splitting up the products. of combustion on
their way from the furnace a, through the nue d to the chimney. This wall c
or mass of brick-work or fire-blocks is made to occupy any convenient position in
the flue d, and any desired proportion of its length and diameter according to
circumstances. In the drawing the wall c is shewn composed of bars or blocks e
running longitudinally of the flue & with other similar bars or blocks flying
across them transversely of the said flue, the uppermost of which are formed with
recesses or grooves g in order to allow a freer passage for the products of com-
bustion between the crown of the flue and the top surface of the uppermost
blocks.
Steam may, when desired, be conducted by the pipe h (Figure 1) from the front
of the boiler as shewn to the space under the furnace bars i; and thence to the
space between the furnace bridge and the wall or mass of brick-work c, and I
prefer to surround this steam-blast pipe by a pipe of larger diameter, one
end k of which opens into the said space behind the iurnace bridge, and the
other end terminates as shewn at the front end of the boiler, and is furnished
with a cap or cover m. This cap or cover m is hinged at n and arranged so that
it may be opened and closed by hand when desired; or it may
be opened by the finger or projection 0 which extends downwards
from the furnace door in such a manner that when the furnace
door
is opened the said finger or projection comes against the projec-
tion g on the cap or cover m whereby the end of the pipe jis automatically
uncovered, the cap or cover m remaining open until closed by hand. By these
means the air admitted to the space between the furnace bridge b and the wall
or mass of brick-work c is heated in its passage through the pipe by the radiated
heat from the furnace (and also from the steam pipe h); and the opening of the
cap or cover m and consequent admission of air to the beforementioned space when-
ever the furnace-door is opened is not dependent upon the memory of the attendant.
By the application of my invention to the furnaces of steam boilers more
perfect combustion of the fuel is secured, smoke is prevented, and consequently
great economy is effected in the working of the boilers.
It is obvious that with suitable, modifications my invention is applicable to
furnaces other than those of steam boilers.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
First. In the furnaces of steam boilers and the like the employment of a wall
or mass of brickwork or fire-blocks in the flue thereof in combination with pipes
for admitting steam and air into the space between the furnace bridge and the
said wall or mass of brickwork substantially as described.

page_text: Second. In the furnaces of steam boilers and the like the combination of the
wall or mass of brickwork or fire-blocks, e, f, with a steam pipe h, air pipe j, and
devices m, o, p, q, for the automatic admission of air into the pipe j and thence
into the space between the furnace-bridge band the wall or mass of brickwork or
fireblocks e, f, substantially as described with reference to the drawing.
Dated this 6th day of February 1900
Dated this 6th day of February
1900
-
E. J. FRY.
Per W. H. Beck,
Agent, 115, Cannon Street, London, E.C.