Improvements in Furnaces and in Steam Boilers Formed in Combination therewith.
Year: 1895

page_text: Date of Application, 11th July, 1895-Accepted, 31st Aug.,
1895
COMPLETE SPECIFICATION.
Improvements in Furnaces and in Steam Boilers Formed in
Combination therewith.
I, GUSTAV HESSE of 79, Iverson Road, West Hampstead, London, N.W.
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 that class of steam boilers known as Cornish boilers and
hence provided with one fire or flue tube wherein in order to obtain a perfect
combustion with small fuel and dust or with a mixture of both, the fuel is allowed
to run out of a feeding hopper built in the upper part of the boiler and taper
downwards from the discharge opening of the hopper.
My improvement consist in arranging a grate below the feeding hopper upon which
the coarser or coked part of the fuel which cannot be carried away into the fire
place or furnace provided for such dust, may be fully consumed as on an ordinary
fire grate.
And in order that my invention may be more fully understood, I have shown.
the same in the accompanying drawings which is a front elevation partly in section
of my improved construction of steam boiler furnace.
B is the boiler proper in which is arranged a corrugated flue or fire tube f
which tapers downwards from the left to the right hand end of the boiler / is
the feeding hopper built in the upper part of the boiler in such a manner that
its lower or discharge opening opens in the flue and is closed by a sliding
plate or damper a. In the lower part of the flue tube f on the left hand side of
the same is formed an inclined passage i leading down to the grate g below
which is arranged the ash box or pit e. The air for promoting combustion in the
fire tube where the dust and small fuel discharge from the hopper h is allowed to..
run slowly down, enters at d and follows the direction indicated by the arrows 2, 3,
4, 5, 6, 7, 9 whence it passes into the stack. The larger or coked portion of the
fuel which has not been carried away into the flue tube f to be consumed, drops on
the grate g where it is burned up; air having access to this grate through the ash.
box or pit as shown by the arrow d and following subsequently the same direction
as shown by the above mentioned arrows 2 to 9. w indicates the water in the..
boiler.
According to my improvements I dispense with the fan or blower generally
used to drive air at c into the fire tube while at the same time effecting a great
economy of fuel.
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 :-
In fire boxes for small and dusty fuel or for a mixture of both wherein the fuel.
is discharged from a feeding hopper and subjected to the action of a current of air
during its fall, the arrangement of a fire grate below the hopper whereon are-
consumed the falling particles of fuel not carried away by the air current
substantially as herein described and shewn.
Dated this 11th day of July 1895
HUGHES, ELI & HUGHES,
76, Chancery Lane, W.C., Agents for the Applicant..