Improvements in Steam Boiler Furnaces.
Year: 1890

page_text: Date of Application, 18th Aug., 1890
Complete Specification Left, 13th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Furnaces.
I, ADAM CYRUS ENGERT of Three Mills Lane Bromley by Bow in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
This invention has for its object improvements in steam boiler furnaces and
relates more especially to such furnaces as are described in a former Patent granted
to me No. 7513 in the year 1884 in which inclined fire bars and ash pit bed and
hanging plate blower are employed. In such boiler furnaces I have found that the
evaporating power is greatly increased by an arrangement of the flues and air
passages which keeps the products of combustion in closer proximity to the surface
of the boiler. I construct an altar of brickwork immediately behind the fire bars
and extending backwards for several feet and between the surface of this altar and
the crown of the flue I leave a free space of a few inches only for the passage of the
products of combustion. In other words I make the brick work erection marked A
in Figure 1 of my former Specification to extend further along the flue as far indeed
as the bridge marked A*. Also I provide a bridge (similar to A) near the exit
end of the boiler flue to keep the licated products of combustion up to the crown
of the flue. Also in the return flue beneath the bottom of the boiler provide
several bridges built up so as to allow only a few inches space between the top of
each bridge and the bottom of the boiler but allowing space between the bridges
for dust to be deposited. Again in the side flues I build up the lower part and
corners so as to leave no part of the flue which is more than a few inches from the
surface of the boiler for I have found that in all angles and corners which are far
removed from the skin of the boiler and especially which are at the lower part of
the flue a great loss of heat occurs, and this it is my object to avoid.
Dated this 18th day of Amruct 1800
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
improvements in Steam Boiler Furnaces.
I, ADAM CYRUS ENGERT of Three Mills Lane, Bromley by Bow in the County
of Middlesex, 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:-
This invention has for its object improvements in steam boiler furnaces and
relates more especially to such furnaces as are described in a former Patent granted
to me No. 7513 in the year 1884 in which inclined fire bars and ash pit bed and
hanging plate blower are employed. In such boiler furnaces I have found that the
evaporating power is greatly increased by an arrangement of the flues and air
passages which keeps the products of combustion in closer proximity to the surface
of the boiler. I construct an altar of brickwork immediately behind the fire bars
and extending backwards for several feet and between the surface of this altar and
the crown of the flue I leave a free space of a few inches only for the passage of the
products of combustion. In other words I make the brick work erection marked A
in Figure 1 of my former Specification to extend further along the flue as far indeed
as the bridge marked A*." Also provide a bridge (similar to A) near the exit
end of the boiler flue to keep the heated products of combustion up to the crown of
the flue. Also in the return flue beneath the bottom of the boiler I provide

page_text: several bridges built up so as to allow only a few inches space between the top of
each bridge and the bottom of the boiler but allowing space between the bridges
for dust to be deposited. Again in the side flues I build up the lower part and
corners so as to leave no part of the flue which is more than a few. inches.from the
surface of the boiler for I have found that in all angles and corners which are far
removed from the skin of the boiler and especially which are at the lower part of
the flue a great loss of heat occurs, and this it is my object to avoid.
In order that my said invention may be most fully understood and readily carried
into effect I will proceed to describe the drawings hereunto anexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section of a steam boiler and furnace.
Figure 2 is a front elevation one half in section.
The boiler here represented is as will be seen provided with two internal
furnaces.
a a are the inclined fire bars and is the ash pit bed so curved as to direct the
air entering by the ash pit upwards towards the fire bars. c is a dead plate
supporting the forward ends of the fire bars. is the hanging plate or blower
shewn separately also in Figure 3, it is perforated at the lower part and it terminates
at a short distance above the surface of the dead plate. The plate or blower
serves to direct the air which is allowed to enter at the bottom of the fire doors e
and when these doors are open it breaks the rush of air striving to enter the
furnace. The plate d is hung on pivots at its upper part so that it may be raised
to admit of fuel being supplied to the furnace. is the altar immediately behind
the fire bars, it extends further along the boiler than the corresponding structure
shown in the drawings of my former Specification No. 75134 is the bridge
is the return flue
which I now provide at the exit end of the interior boiler flue.
beneath the bottom of the boiler and 2 are bridges which I build up within this
flue. I form these structures in great part or entirely of loose bricks so that there
is no difficulty in removing them when necessary for the inspection of the boiler or
for any other purpose. For a long boiler 1 should provide three or more of these
bridges. are the side flues by which the products of combustion pass again from
front to rear in order to reach the chimney. I build up the lower part or corners of
these flues with loose bricks at i¹³, so as to exclude the draught as far as possible
from the lower parts and corners of these flues and confine it as much as may be to
the immediate neighbourhood of the skin of the boiler. This building up may be
continuous or it may consist of two three or more walls erected at intervals with
pockets between.
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 :-
9
1. The broad altar in rear of the fire bars, together with the bridge at the
exit end of the furnace flue and the space or pocket between substantially as
described.
2. The bridges or structures in the return flue beneath the bottom of the
boiler by which the draught is brought close to the skin of the boiler whilst pockets
are provided for the deposit of dust.
3. The loose brickwork in the side flues i by which the draught is excluded
from the lower parts and angles of the side flues but without interference with the
inspection of the boiler.
4. The combination substantially as described of the parts a bedef and g:
5. A steam boiler furnace substantially as herein described and illustrated by the
annexed drawings.
A. C. ENGERT.