Improvements in and relating to Steam Boiler Furnaces.
Year: 1894

page_text: Date of Application, 13th Apr, 1894
Complete Specification Left, 12th Feb., 1895-Accepted, 23rd Mar., 1895
'Communicated from abroad by LUDWIG BASSE, of the Chinese Imperial
Maritione Customs Cruiser "Kaipan," Hong-Kong, China, Engineer.]
Improvements in and relating to Steam Boiler Furnaces.
I, EDWARD HENRY BLATHWAYTE TYLER, of Stoney Croft, Weston-super-
Mare, Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
According to this invention, which has reference to boiler furnaces, the grate
consists of flat perforated plates laid in close contact. The perforations are wider
at the bottom than at the top of the plates and are so shaped as to be, in vertical
section, conical. By means of an injector, or like appliance, air and steam are
injected into a closed ash pit below the grate and pass up through the perforations
to the fuel laid on the grate. The steam on issuing from the perforations of the
plates becomes decomposed and, as a result, the said plates are kept comparatively
cool and their durability is consequently increased. The injected air and steam
spread as they issue from the perforations in the plates of the grate and combustion
of the fuel is rendered complete and uniform. Dust or small coal may be used
with good results. The quantity of air and steam and the relative proportions of
each are adjustable and variable through the injecting appliance.
Dated this 12th day of April 1894.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.
Improvements in and relating to Steam Boiler Furnaces.
I, EDWARD HENRY BLATHWAYTE TYLER, of Stoney Croft, Weston-super-
Mare, Electrical 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, which relates to steam boiler furnaces, has for its object to enable
dust coal, or other more or less small or pulverized fuel, but especially anthracite
coal dust, to be used in such furnaces.
According to this invention, the object above set forth is effected by the
substitution of perforated plates for the fire bars hitherto employed, and by the
agency of a steam and air injecting appliance whereby steam and air are injected
into the ash-pit below the plates, which ash-pit is otherwise closed.
The perforations or apertures in the plates are arranged at suitable distances
apart and bave inclined sides, the widest part being at the bottom of the plate, that
is to say, next the ash-pit. Subject to this condition the perforations or apertures
may vary in shape as may be desired.
The appliance for injecting air and steam into the closed ash-pit may be a
combined air aud steam injector, or the blast from a fan or similar blower and a jet

page_text: of steam may be conducted into the ash-pit. The place of introduction may be at
the front or other part of the ash-pit.
The injected air and steam become diffused on issuing from the perforations in
the plates of the grate, promoting effective and uniform combustion of the fuel.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
In a steam boiler furnace, the substitution of perforated plates for fire-bars the
perforations being wider at the bottom of the plate than at the top, and the
combination therewith of an injector or like or analogous appliance for injecting
air and steam into the ash-pit below the said plates, the said ash-pit being closed
except so far as regards the inlet for such air and steam and the perforations in
the plates, substantially as hereinabove described and for the purpose specified.
Dated this 11th day of February 1895.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.