Improvements in Steam Generators.
Year: 1890

page_text: Date of Application, 22nd Apr., 1890
Complete Specification Left, 22nd Jan., 1891-Accepted, 22nd Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
I, RICHARD CUNLIFFE, of 89, Hankinson Street, Pendleton, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
:―
My invention relates to improvements in steam generators and has for its object
to attain a better utilization of the furnace heat and thus an increased generation of
steam at a less cost than heretofore has been the case.
To this end my improvements consist in forming in the flue tube a number of
transverse pockets or cavities, through which the water to be heated circulates and
which serve to arrest the heat in its passage through the flue by striking against
the same and thereby facilitate a better absorption of the heat, a great deal of
which otherwise is lost, owing to it being permitted of passing direct into the
chimney.
The said pockets or cavities by means of pipes or openings, communicate with
the water space of the generator so as to effect a thorough circulation of the water
through the said pockets or cavities.
The pocket or cavity near the furnace or fire bridge, I form a short distance
apart thereof, so as to leave a free space between the same for the admittance of air
and thereby assists the combustion of the fuel, the amount of which air, may be
regulated by a damper.
In order to facilitate the use of liquid fuel I employ in front, inside of the
furnace, a spray pipe in connection with a blow pipe, the former serving for the
supply of liquid fuel and the latter for the diffusion of the same in the furnace onto
loose asbestos placed onto the fire bars.
Dated this 21st day of April 1890
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
I, RICHARD CUNLIFFE, of 89, Hankinson Street, Pendleton, in the County of
Lancaster, Engineer, 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 :-
My invention relates to improvements in steam generators and has for its object
to attain a better utilization of the furnace heat and thus an increased generation of
steam at a less cost than heretofore has been the case.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section through the shell and flue tube of a steam
generator, with flue tube partly in view, constructed according to my invention.
Fig. 2 is a cross section on line A-B, Fig. 1.
Fig. 3 is a longitudinal section.
Figs. 4 & 5 are end views and
Fig. 6 a cross section at line C-D Fig. 3, of the flue tube showing some modifi-

page_text: In carrying out my invention and referring to Figs. 1 & 2 my improvements
consist in forming in the flue tube a of the steam generator, a number of transverse
pockets or cavities, through which the water to be heated in the shell c of
the generator circulates and which serve to arrest the heat in its passage through
the Hue tube a by striking against the same and thereby facilitate a better
absorption of the heat, a great deal of which, otherwise is lost, owing to it being
permitted to pass direct through the flue tube a into the chimney flue or chimney.
The interior of the pockets or cavities 6 by means of pipes d and openings e
communicate with the water space ƒ of the generator so as to effect a thorough
circulation of the water through the said pockets or cavities h.
The pipe d which is formed or fitted below the pocket or cavity serves also
to support the same and thereby strengthen the flue tube a. Any suitable
number of openings e in connection with the pocket or cavity and the water
space of the generator may be formed in the flue tube a and to further absorb
the hot gases in the latter an opening g may be formed in a longitudinal direction
through the pocket or cavity so as to permit the hot gases in the flue tube a to
pass through the same.
In lieu of forming the pockets or cavities as shown in the drawing annexed
in the upper half of the flue tube a, the same may be similarly formed in the lower
half or alternately in the upper and the lower half or in the sides of the flue tube a.
The pocket or cavity near the furnace or fire bridge, I form a short
distance apart thereof, so as to leave a free space between the same for the
admittance of air and thereby assist the combustion of the fuel, the amount of
which air, may be regulated by means of a damper i employed over an opening k
formed below the furnace or fire bridge and operated by means of a rod l.
In order to facilitate the use of liquid fuel I employ in front, inside of the
furnace m, see Figs. 1 & 3 near the door thereof, a spray pipe n in connection with
a blow pipe o, the former serving for the supply of liquid fuel and the latter for the
diffusion of the same in the furnace m onto loose asbestos or other suitable material
placed onto the fire bars p.
The pipes & o are respectively furnished with a tap or valve n¹ & o¹ to permit
of regulating the amount of liquid fuel to be fed and diffusion of the same, which
latter may be effected by the aid of a blast of air through pipe o or by the aid of
steam through pipe o, o arranged in connection with the steam space f¹ of the
generator.
In lieu of using a damper i, as shown in Fig. 1, to create the necessary draft and
assist combustion of the fuel, I may form the fire bridge h, see Figs. 3, & 5, with
ports in connection with a steam jet 7 so as to cause steam to issue from the back
of the fire bridge and come in contact with the gases from the furnace m. Another
steam jet is employed below the fire bars p near the front of the furnace m to
create the necessary draft in the same and thus assist the combustion of the fuel.
In some cases I employ in the flue tube a between the fire bridge and the first
pocket or cavity b, see Figs. 3 & 6, a perforated partition made of suitable fire:
proof material through which the hot gases from the furnace are caused to pass.
This partition has for its object to break up the said hot gases in small volumes
and thereby to arrest the smoke and assist combustion.
The back end of the flue tube a 1 partially close and furnish with a damper,
which by any well known means such as a chain and pulley can be regulated for
the purpose of obtaining more or less draught as may be found necessary to effect a
perfect combustion of the furnace gases.
In order to prevent the hot gases, in the cavity on each side of the steam generator,
from fushing into the chimney flue a', I reduce the section of the said cavity at its
back end by forming a walls which leaves only a small opening s¹ near the bottom
of the said cavity for the hot gases to pass through, thus partly arresting the
same.
Below the water line of the steam generator, I fix to the exterior of its shell ca
number of pipes c', through which the water is permitted to circulate, and which

page_text: project into the cavity on each side of the steam generator, so as to absorb the hot
gases contained therein and thus assist the generation of steam.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
"In steam generators."
1st. The general construction and arrangement of parts and modification thereof
adapted and operating substantially as and for the purpose specified.
2nd. The formation in the flue tube a of pockets or cavities having pipes d and
openings e through which the water in the generator is permitted to circulate,
substantially as and for the purpose specified.
22
3rd. The application to a furnace m of a fuel supply jet or pipe n in connection
with an air blast or steam pipe or jet o, o², substantially as and for the purpose
specified.
Dated this 21st day of January 1891.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.