Improvements in connection with Steam Boilers, Furnaces, and the like.
Year: 1893

page_text: Date of Application, 23rd Feb., 1893
Complete Specification Left, 8th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in connection with Steam Boilers, Furnaces, and
the like.
I, ROBERT GREgory, of, 23, Brooksby Street, Liverpool Road, Islington, in
the County of Middlesex, Engineer do hereby declare the nature of this invention
to be as follows:-
My invention for improvements in connection with steam boilers, furnaces, and
the like, has for its object a more perfect consumption of the smoke generated
during the combustion of the fuel, and consequently the attainment of a higher
temperature per unit of fuel consumed, as compared with the methods and méans
hitherto adopted for this purpose, and the utilization of a small portion of the
steam generated, for creating or promoting a forced draught for the purpose of
assisting the perfection of the said objects, or when steam is required to be got up
quickly.
I attain the objects of my invention by providing, and fixing at either, or both
sides or other convenient part or parts of the opening of the ash pit or pits, a
metallic trumpet shaped air inlet, in such a manner that the bell mouthed opening
of each would be at the outside of the boiler or furnace, and in a vertical position, while
the smaller or inner end or ends is or are inclined upwards, towards, and terminating
a suitable distance from, the under surface of the fire bars. A like or similar
trumpet shaped air inlet would be provided and fixed in and through the upper part
of the furnace door or doors, the larger or bell mouth of which would be upon the
outer side thereof, and inclining therefrom in an upward direction or approximately
so, terminating, preferably, at or near the level of the top of said door, the inner
end terminating either at right angles with the door or slightly deviating therefrom
in an upward direction, to assist in directing the current to the upcast shaft or
funnel.
Each of said trumpet shaped openings would be provided with a like shaped or
coned interior, of the same or other metal, and of lesser diameter and length, the
said inner trumpet or cone being connected to the outer by suitable stays or ties,
and placed therein in such a manner, that the larger forms a jacket for the smaller,
an air space being thus provided between the one and the other.
A steam pipe or tube leading from the boiler above the water level, passes in a
downward direction, and is branched so as to make connection with each of the said
inner cones or trumpets, and terminating therein with a suitable nozzle or jet,
pointing in the direction of the smaller ends of said cones or trumpets. A suitable
valve or valves would be provided in said steam pipe or the branches thereof, or
both, by means of which the steam may be turned into either or all of said
inner trumpets or cones, or shut off therefrom as circumstance may require. Or
where my invention is used in connection with a battery of boilers, the said steam
pipe may lead off from any one boiler of said battery, and be branched and valved
so as to operate upon the cones of any one boiler, or the whole of them, as may be
desired.
The branch of said steam pipe that is connected to the cone upon the furnace
door or doors, may be of elastic material, or if of metal may be suitably jointed, to
permit the said door or doors to be opened when required for stoking and other
purposes.
The steam being let into the said cone or cones by the opening of the said valve
or valves, would, in the case of the lower or bottom cones, impinge directly upon
the under surface of the fire bars, and would at the same time induce a current of
air between the inner cones, and outer trumpets. In like manner the steam would

page_text: operate upon the upper cone causing the steam and air to mingle with the flame of
the furnace, and these combined draughts of steam aud air becoming superheated
would mingle with the carbonaceous vapour or smoke and perfect the combustion
thereof, the extra heat arising therefrom being utilized in the generation of
steam, thereby effecting a saving in the fuel, and a perfect consumption of the
smoke.
My invention may be employed in connection with any type of boiler whether
vertical or horizontal, tubular or otherwise, and in connection with furnaces other
than boiler furnaces, where a jet of steam is available, and I may find it convenient
to form the said trumpets, and may be the inner cones of same, D or other shape
in cross section, so as to correspond with the shape of the mouth of the ash pit
or pits.
Dated this 92nd der of Fabr 1902
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in connection with Steam Boilers, Furnaces, and
the like.
I, ROBERT GREGORY of 23 Brooksby Street, Liverpool Road, Islington, 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 :-
My invention relates to improvements in connection with steam boilers, furnaces
and the like, and has for its objects a more perfect combustion of the fuel employed,
and consequent consumption of the smoke or carbonaceous vapour generated, by
which I am enabled to employ as fuel or partly as fuel rough or otherwise waste
material, such as screening of coal, breeze, coke dust and vegetable and other
refuse, which it has hitherto been impossible to use for this purpose, and by the
means of such perfect combustion, and the utilization of said waste material I can
obtain a much higher degree of temperature per unit of coal employed as compared
with the method and means of stoking hitherto adopted.
In so far as regards steam boilers I attain the objects of my invention by the
utilization of a small portion of the steam generated for creating or promoting a
forced draught above and below the furnace bars, or the utilization of a portion
of the steam from one boiler for creating such forced draught in the furnace of
another, when high pressure steam is required to be got up quickly, or as a means
for creating a forced draught in other furnaces such as those employed for smelting
and other purposes.
In order that the manner in which I employ my said invention may be fully
understood, I have hereunto appended a sheet of drawings, in which I have chosen
to illustrate its application in connection with ordinary vertical and horizontal
boilers.
Figs. 1 and 2 are front elevation and vertical section respectively of an ordinary
vertical steam boiler.
Fig. 3 is a like elevation of a horizontal boiler, while Fig. 4 is a section of the
same upon the line A. B.
Figs. 5 and 6 are, enlarged end elevation, and vertical longitudinal section
respectively of the apparatus which I attach to such and other furnaces in the
manner hereinafter explained.
I carry my invention into effect by fixing by any suitable means at either or both
sides or other convenient part or parts of the ash pit or pits of the furnace, a
metallic trumpet or bell mouthed air inlet A, in such a manner that the bell mouth
of each would be outside the furnace and in a more or less vertical position, while

page_text: the smaller end or ends thereof would be within and inclined in an upward direction
towards, and terminating a suitable distance from, the under surfaces of the fire
bars B. A similar trumpet shaped bell mouthed inlet or inlets A¹ would be fixed
upon and passed through the upper part or front of the furnace as at Figs. 3 and 4,
or the door or doors C thereof as at Figs. 1 and 2, the bell mouth of A' being as
before upon the outer surface of the furnace, but in this case preferably, inclining
in a more or less upward direction, while the smaller and inner end or ends of same
(when used in connection with vertical boilers) would terminate in a slightly
upward direction as at Fig 2, in order to assist in directing the current of air to
the upcast shaft or funnel, but when used in connection with horizontal boilers as at
Fig. 4, I prefer that the smaller end of A' shall turn more or less in a downward
direction so that the forced draught therefrom shall impinge directly upon the
blazing fuel, and in the direction of the boiler shaft.
Each of said openings A and A' would be provided with a like shaped or coned
interior D, of the same or other metal, but of lesser diameter and length that A
or A', and connected thereto by any convenient and suitable means, which may be
that of stays or ties E, (shewn more graphically by the larger views Figs. 5 and 6)
arranged in such a manner that an air space is provided between the inner surfaces
of A and A' and the outer surface of D.
A steam pipe F, leading from the boiler above the water level, passes in a
downward direction, terminating in a suitable junction piece, from which extends
other, and preferably smaller tubes, one of which G would be led through a hole
in Al into D, terminating in a suitable nozzle or jet, pointing in the direction of the
smaller end of A', the other branch tubes G' and G would communicate in like
manner with the inner trumpets or cones D of the air inlets A. A suitable
valve H would be provided anywhere in F, and if necessary in the branches G, GI
or G", by means of which steam may be turned into either or all of said trumpets
or cones D, or shut off therefrom as circumstances may require. Or where my
invention is used in connection with a battery of boilers, the steam pipe F may lead
from any one of them, and be branched and valved so as to communicate with the
trumpets or cones D of any one boiler, or the whole of them as may be required.
Or the pipe F of each boiler may communicate with one pipe common to the
whole battery, so that the steam from any one battery may be led into any or all
the cones D of the remainder.
In such cases as where the device A' is fixed upon the door or doors C of the
boiler, the tube G may be of elastic material, or of metal suitably jointed, to permit
A to move with C, when the latter has to be opened, for stoking and other purposes,
but I prefer that a portion of C may be cut away to accommodate the presence
of A as a fixture, so that C may be opened clear thereof.
The steam when let into the trumpets or cones D, by the opening of the valve or
valves H, would, in the case of the lower devices A, impinge directly upon the
under surfaces of the bars B, and would at the same time induce a current of air
between D and A in the same direction. In like manner the steam would operate
upon D and A' causing the steam and air to mingle with the flame of the furnace,
and these combined draughts of steam and air becoming. superheated, a water gas
would be generated, giving off a most intense heat, which, mingling with the
carbonaceous vapour or smoke would effect the perfect combustion thereof, and the
extra heat from these combined effects would of course be utilized in the generation
of steam, thereby effecting a great saving in the cost of fuel, and a perfect
consumption of the smoke.
By these means I am enabled to obtain a combination of forced draughts that
may be regulated to almost any extent by means of the valve or valves H, which
permits the consumption of almost waste substances as fuel, and I find in practice
that the device A has the effect of keeping the bars B cool and free from clinkers.
My invention may be employed in connection with any type of boiler whether
vertical or horizontal, tubular or otherwise, and in connection with furnaces other
than boiler furnaces, where a jet of steam is available, and 1 may find it convenient

page_text: to form the outer casings A or A' or the inner casings or cones D, or both, of D
or other shape in cross section so that these may be more readily adapted to ash
pits of various shapes, and I wish it understood that I may employ the use of one
or any number of the said devices either above or below the furnace, and disposed
in any convenient manner without departing from the principle of my invention.
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
1st. In combination with any form or type of steam boiler or other furnace
where steam is available, the application thereto of my improved device for creating
a forced draught therein, substantially as herein described and shewn by the
appended drawings.
2nd. In combination with any form or type of steam boiler or other furnace where
steam is available, the construction and use, and the application thereto, of any number
of bell mouthed trumpet shaped air inlets A or A', arranged above or below the
furnace, or both, each provided with an inner trumpet or cone D, connected thereto by
ties or stays E, or their equivalents, and arranged in such a manner than an open air
space exists between A or A' and D, the latter in communication with a service
of steam derived from any available source, which may be from that of the boiler
upon which the device or devices is or are fixed, for creating a forced draught in
said furnace, substantially as herein described and shewn by the accompanying
drawings.
Dated this
day of November 1803
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.