Year: 1886

page_text: Date of Application, 2nd Apr., 1886.
Complete Left, 3rd Jan., 1887.
Complete Accepted, 4th Feb., 1887.
I; BRIERLEY DENHAM HEALEY of 37 Victoria Street, Liverpool, in the County of
Lancaster, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention has reference to an improved form of apparatus for the economic use
of gaseous fuel in the furnaces of steam generators, salt evaporating pans, caleining
kilns, sludge drying floors, and numerous others, in which only a moderate temperature
is usually required, but from which the combustion should be complete.
The gaseous fuel may be produced in generators shewn and described in my
Specifications of Patents No. 15,377, A.D. 1884, or No. 85, A.D. 1872, or in any other
convenient and suitable form of apparatus, but I prefer to use the gas as hot as possible,
and therefore I draw it by means of a dipping water cased tube from the centre of the
generator.
Instead of admitting cold air at or near the door or at the bridge where the gas and
air are mixed and combustion is commenced, by my present invention the air passes
along an inlet tube or tubes or flue or flues below the usual position of firegrate, and
after travelling some distance from the front, it returns towards the front and passes
into a receiver over the front dead plate from which it emerges in jets in a heated
state and meets the gas.
The gas is conveyed from the generator in tubes which by preference are lined with
fireclay tubes or bricks, and these conduits as well as the air inlets are provided with
regulators. The usual firebars may remain in the furnaces in which case they are
covered with rebated tiles or plates easily removable in case hand firing has to be
resorted to during repairs of gas generators.
The combustion chamber is lined with firebrick, and the front is provided with doors
to suit old frames, the latter being readily exchanged for old doors when hand firing
has to be resumed. The gas inlets are surrounded by a current of heated air and are
easily removed.

page_text: COMPLETE SPECIFICATION.
Improvements in Gas Fired Furnaces for Various Purposes.
I, BRIERLEY DENHAM HEALEY of 37 Victoria Street, Liverpool in the County of
Lancaster, Civil 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 has reference to an improved form of apparatus for the economic use
of gaseous fuel in the furnaces of steam generators, salt evaporating pans, calcining
kilns, sludge drying floors and numerous others, in which only a inoderate temperature
is usually required but from which the combustion should be complete.
The gaseous fuel may be produced in generators shewn and described in my
Specifications of Patents No. 15,577 A.D. 1884 or No. 85 A.D. 1872 or in any other
convenient and suitable form of apparatus but I prefer to use the gas as hot as possible,
and therefore I draw it by means of a dipping water cased tube from the centre of the
generator.
Instead of admitting cold air at or near the door or at the bridge where the gas and
air are mixed and combustion is commenced, by my present invention the air passes
along an inlet tube or tubes or flue or flues below the usual position of firegrate, and
after travelling some distance from the front, it returns towards the front and passes into
a receiver over the front dead plate from which it emerges in jets in a heated state and
ineets the gas.
The gas is conveyed from the generator in tubes which by preference are lined with
fireclay tubes or bricks and these conduits as well as the air inlets are provided with
regulators. The usual firebars may remain in the furnaces in which case they are
covered with rebated tiles or plates easily removable in case hand firing has to be
resorted to during repairs of Gas generators.
The combustion chamber lined with firebrick, and the front is provided with doors
to suit old frames the latter being readily exchanged for old doors when hand firing
has to be resumed. The gas inlets are surrounded by a current of heated air and are
easily removed.
And in order that my invention may be understood I have appended hereto a
drawing which illustrates the application of this invention to steam generators of
which figure 1 is a front elevation and figure 2 is a section
The Gas Producers should be built as near as practicable to the front end of boiler
house, the gas being conducted to the front end of boilers in tubes A, which are lined
with fireclay tiles to prevent radiation.
At the boilers the supply of gas is regulated by valves B, from which it passes
through jet pipes Cinto the combustion chambers D, which are formed over the
ordinary firebars. The boiler flues are lined with firebricks as far as the bridge, and
the firebars are covered by thin firebricks, so that in small installations hand firing
may be resorted to during repairs of Producers. Air to support combustion enters the

page_text: front end of movable tubes F, passes underneath the firebars toward the bridges G,
and in returning towards the front end it becomes highly heated, finally entering the
annular flues Hand passing to the combustion chamber through the ports I. The gas
and air both meet in a highly heated state and a rapid combustion is thus ensured.
The supply of air is under full control, being regulated by slides K at each end of
dead plate.
The foregoing arrangement is readily applied to all existing boilers, but where new
boilers are intended to be fired with gas, and for salt pan furnaces, I build or form
square fire-clay air heating tubes in the walls of the flues in addition to using the
underside of combustion chambers.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is,
The method of applying gaseous fuel to the furnaces of steam generators, salt
evaporating pans, caleining kilns, sludge drying floors, and other furnaces where
moderate temperatures are required but from which the combustion should be complete,
substantially as herein shewn and described.