Improvements in Furnace Grates for Marine and other Steam Boilers.
Year: 1895

page_text: Date of Application, 29th Aug., 1895
Complete Specification Left, 18th May, 1896-Accepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Furnace Grates for Marine and other Steam
Boilers.
1, WILLIAM ARENA MARTIN, of Elm Cottage, 137, Brixton Hill, Brixton, in
the County of Surrey, Engineer do hereby declare the nature of this invention to
be as follows:-
This invention has for its object increased facilities in the working and manage-
ment of furnaces of marine and other boilers and is applicable to furnaces in which
two or more lengths of fire bars are used.
I arrange the front row of fire bars on three bearers grooved to suit the section
of fire bars employed. I fix these bearers at such a level and distance as to
permit the fire bars to be drawn forward and to pass freely beneath the furnace
front and dead plate leaving an opening for ashes to fall into the ash pit, instead
of being drawn out through the fire-door opening in the usual way. The said fire
bars, whilst in this position, being held in line by the front bearers, can then be
pushed back into their places, the ashes can be cooled and drawn out and the
furnace restored to working order.
Dated this 29th day of August 1895.
Improvements in Furnace Grates for Marine and other Steam
Boilers.
I WILLIAM ARENA MARTIN of Elm Cottage, 137, Brixton Hill, in the
County of Surrey, 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 objects increased facilities in the working and manage-
ment of the furnaces of marine and other boilers and is applicable to furnaces in
which two or more lengths or rows of fire bars are or can be used. To effect
these objects, I arrange the fire-bars, or the front row of them, on grooved
bearers; the fire-bars of the front row being supported on three of the said
grooved bearers, fixed at such a level as to cause the top of the said fire-bars to
come below the line of the bottom of the furnace front and dead plate. The said
fire-bars are not fixed in any way, but simply supported by the aforementioned
grooved bearers, so that when it is required to clean the fire they may be drawn
forward, partially out of the furnace, beneath the furnace front and dead plate,
leaving an aperture between the fire-bars of the front row and those of the second
row through which the ashes and dross are caused to pass into the ash-pit instead
The said
of being drawn out through the fire door opening in the usual way.
fire-bars after having been drawn forward and whilst projecting partly out of the
furnace are held in line by the two front bearers.
After the operation of cleaning, the said fire-bars can be pushed back again
D

page_text: into their places in the furnace and the ashes and dross which have fallen through
into the ash-pit cooled and drawn out.
I prefer that all the fire-bars composing the grate should be arranged and
supported on grooved bearers as herein described, but I can in some cases, apply
the principle of my said invention to a furnace in which there is more than one
row of fire-bars by arranging the fire-bars of the front row only on grooved
bearers in the manner herein described.
In order that my invention may be fully understood, I shall now proceed to
describe the drawing accompanying this specification, the said drawing being a
section of the improved grate herein described.
A. represents the fire-bars, supported by the grooved bearers and indicates the
manner in which the front row of the said fire-bars may be drawn forward for the
purpose of allowing the ashes and dross to fall through into the ash pit.
B. are the grooved bearers fixed as hereinbefore described, the front row of
fire-bars having three of the said bearers. The centre bearer marked 2 serving to
keep the fire-bars in line when drawn forward and to prevent them from falling
into the ash-pit.
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 1
claim is :-
The construction and arrangement of an improved furnace grate having fire
bars of two or more lengths or rows. The fire-bars of the front length or row
being supported on or by three grooved bearers fixed at such a level as to cause
the top of the said fire bars to come below the line of the bottom of the furnace
front and dead plate so that the said fire-bars may be drawn forward partially
out of the furnace, leaving an aperture between the said front length or row of
fire-bars and the second length or row of fire bars through which the ashes and
dross can be made to pass into the ash-pit.
Dated this Eighteenth day of May One thousand eight hundred and
ninar civ
WILLIAM ARENA MARTIN.