Improvements in and Applicable to the Furnaces of Externally Fired Steam Generators.
Year: 1887

page_text: Date of Application, 26th Sept., 1887
Complete Left, 25th June, 1888
Complete Accepted, 27th July, 1888
PROVISIONAL SPECIFICATION.
Improvements in and Applicable to the Furnaces of Externally
Fired Steam Generators.
We JOHN VICARS, THOMAS VICARS, and JOHN VICARS the younger, all of 56 Scel
Street, Liverpool, in the County of Lancaster, Engineers do hereby declare the
nature of this invention to be as follows:-
The object is to adapt our well known self stoking furnaces in which the fire bars
are carried forward in a body from the front to the rear end of the grate and are
moved back again in detachments, or one at a time, or equivalent furnaces, for use
with externally fired steam generators.
For the above purpose we provide suitable carrying walls and fit at the rear of the
furnace and at a lower level than the firebars thereof a horizontal or nearly horizontal
grate or grid to receive the fuel pushed by the bars beyond the bridge.
In practice we prefer to use the furnace described in specification Number 378 of
the year 1879.

page_text: Improvements in and Applicable to the Furnaces of Externally
Fired Steam Generators.
We JOHN VICARS, THOMAS VICARS, and JOHN VICARS the younger, all of 56 Seel
Street Liverpool, in the county of Lancaster Engineers, 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 :-
The object is to adapt our well known self stoking furnaces in which the fire bars
are carried forward in a body from the front to the rear end of the grate and are
moved back again in detachments or one at a time or equivalent furnaces, for use with
externally fired Steam Generators.
For the above purpose we provide suitable carrying walls and fit at the rear of the
furnace and at a lower level than the firebars thereof a horizontal grate or grid to
receive the fuel pushed by the bars beyond the bridge.
In practice we prefer to use the furnace described in specification Number 378 of
the year 1879.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a longitudinal section and fig. 2 a transverse section of so much of a steam
generator and appurtenances as is necessary to illustrate our invention. 1 shell of
generator. 2 furnace walls 3 fire bars carried on the bridge 4 and dead plate 5.
6 driving mechanism of our well known of any equivalent type for giving the bars 3
a forward motion in a body and a backward motion in detachments. 7 crossbearers
secured in the walls 2 behind and at a lower level than the bridge 4. S grate or grid
carried by the crossbearers 7. 9 ash pit. 10 hopper and plunger or other like well
known apparatus for intermittently supplying fuel to the bars 3. The fuel is fed onto
the bars 3 from a hopper or like contrivance 10 by means of plungers or other
suitable agents, the fuel deposited on the said bars is caused to travel from
the front to the bridge by the collective and several motions of the bars as is well
known and any unburnt fuel falls over the bridge onto the grate 8 where combustion
is completed.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is.
Furnaces for externally fired steam generators substantially as herein set forth.