Year: 1885

page_text: I, CHRISTOPHER HILL, of N° 7, Custom House Terrace, Victoria Dock Road, in
the county of Middlesex, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention consists in improvements in the furnaces of marine, cornish,
locomotive and other steam boilers, the same being also applicable to other kinds
of furnaces. The object of the said improvements is to prevent the overheating
of the fire bars and to lessen the liability of the fuel to form clinkers on the grate.
I arrange, longitudinally or transversely, within the ashpit and immediately
below the fire bars one or more pipes, below the centres of which and, by pre-
ference, at both sides, are formed a number of apertures. The said pipe or pipes
is or are connected with a steam supply in such a manner that the steam will
enter the same and will escape through the said apertures into the ash pit where it
expands, and then rising up to the grate tends to keep the fire bars cool and to
prevent the formation of clinkers.
Dated this fourteenth day of November, One thousand eight hundred and

page_text: other Purposes.
I, CHRISTOPHER HILL, of No 7, Custom House Terrace, Victoria Dock Road,
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 said invention consists in improvements in furnaces of marine, cornish,
locomotive and other steam boilers and it is also applicable to other kinds of
furnaces. The object of the said improvements is to prevent the overheating of
the fire bars and to lessen the liability of the fuel to form clinkers on the grate.
I arrange longitudinally or transversely within the ash pit and immediately
below the fire bars one pipe or more pipes at one or both sides of which are a
number of apertures. The said pipe or pipes is or are connected with a steam
supply in such a manner that the steam will enter the same and will escape through
the apertures in the pipes into the ash pit where the steam expands and rising
up to the grate tends to keep the fire bars cool and prevent the formation of
clinkers. The steam passing between the fire bars on to the fuel also serves to
assist the combustion of the latter. The said apertures are so formed that the jets
of steam therefrom will not impinge upon the bars, but will issue in a more or less
horizontal direction.
I will now refer to the accompanying drawings from which the nature of my
said invention will be more clearly understood. Figure 1. is a front view of a
cornish boiler, the front plate of the furnace being removed. Figure 2. is a view
of the bottom of the grate, and Figure 3. is a longitudinal section of the grate.
The same letters of reference indicate like parts in all the Figures. a. is the grate
b. are the steam pipes arranged below the grate, and c. is a pipe connecting the said
steam pipes with the steam space of the boiler.
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 arrangement below the grate of a furnace of one or more steam pipes, each
pipe being provided with apertures in one or both sides, substantially as herein-
before described and shown in the accompanying drawings.
Dated this 10th day of A100R