AN IMPROVEMENT IN FURNACE-
Year: 1883

page_text: LETTERS PATENT to Fountain Livet of Livet and Company Limited, Boiler
Makers and Fuel Economiser Engineers of Short St Finsbury Pavement in
the City of London for an Invention of AN IMPROVEMENT IN FURNACE-
"
PROVISIONAL SPECIFICATION left by the said Fountain Livet at the
Office of the Commissioners of Patents on the 9th February 1883.
FOUNTAIN LIVET of Livet and Company Limited, Boiler Makers and Fuel
Economiser Engineers of Short St, Finsbury Pavement in the City of London
'AN IMPROVEMENT IN FURNACE BARS AND IN CLINKER SLICING TOOLS TO BE USED
THEREWITH
"
I make the furnace bars in two pieces the upper piece upon which the fuel rests
resting upon the lower one which in turn rests on the bearing bar. The whole fire
bar tapers down to a sharp edge at the bottom and is made as deep as the ash pit
will allow, for the purpose of offering a large heating surface over which the air
must pass before entering the fuel and feeding it upwards with increased velocity.
The bars have lugs or guides on the sides to keep them a certain distance from each
other, or instead there are distance pieces threaded on the bearing bar.
The front ends of the top portion first set of bars are rounded downwards
towards the dead plate above which they rise some 2 inches and the guides or lugs
on the sides of the top bars are made to terminate some 2 inches below the top of
the bars so that a continuous air space or groove about 2 inches deep is formed
between the top bars one end of which facing the stoker is raised above the dead
plate. In this manner on pushing a slicer (bereafter described) over the dead plate
it enters between the bars and being pushed to the back end of furnace splits up
and lifts the clinker. Each set of bars except the front set has the corners rounded
off to allow of the free passage of the slicer.

page_text: In order that the bars may be kept in their places end to end and the groove or
air space be continuous they are made to rest on notched bearing bars. The bars
are so constructed that the air spaces between the bars at the front end of the
furnace are made wider than those at the back end to equalize combustion
throughout the furnace.
The slicer is made in the form of a plough share on a handle with a broad rib
on the top side at right angles to the blade so that the point enters the groove
between the bars and forces its way under the clinker breaking it up and turning
it over by means of the broad rib on the upper edge. Stops are placed at the back
end of the blade of the slicer on each side to prevent its sinking too deep between
the bars.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Fountain Livet in the Great Seal Patent Office on the 9th August
1883.
FOUNTAIN LIVET of Livet and Company Limited Boiler Makers and Fuel
Economiser Engineers of Short St Finsbury Pavement in the city of London
AN IMPROVEMENT IN FURNACE-BARS AND IN CLINKER-SLICING TOOLS TO BE USED
THEREWITH
For the purposes of my Invention I make the furnace bars in two pieces A B as
in Figures 1 and 2 the upper piece A upon which the fuel rests resting upon the
lower one B which in turn rests on the bearing bar C.
The whole fire bar tapers down to a sharp edge D at the bottom and is made as
deep as the ash pit will allow for the purpose of offering a large heating surface
over which the air must pass before entering the fuel and guiding it upwards with
increased velocity. In order that the ashes may fall freely the upper piece A is
made tapering from about one inch at the top to less than three eighths inch at
bottom and the lower piece from about three eighths at top to one sixteenth inch
at bottom. The top of the lower piece is made wider than the bottom of the upper
one in order that the former may overlap the other and that no obstacle may be
afforded to the draught in case the upper piece should get out of place.
The bars have lugs or guides E on the sides to keep them a certain distance from
each other or instead there are distance pieces threaded on or inserted in a slot in
the bearing bar.
The front ends F of the top portion first set of bars are rounded downwards
towards the dead plate G above which they rise some two inches and the guides
or lugs or distance pieces E on the sides of the top bars are made to terminate
some two inches below the top of the bars so that a continuous air space or groove
about two inches deep is formed between the top bars one end of which facing
the stoker is raised above the dead plate. In this manner on pushing a slicer
(hereafter described) over the dead plate G it enters between the bars A A and
being pushed to the back end of furnace splits up and lifts the clinker. Each set
of bars except the front set has the corners rounded off to allow of the free passage
of the slicer.
In order that the bars may be kept in their places end to end and the groove or
air space be continuous they may be made to rest on notched bearing bars.
The bars are constructed with their top sides thicker at the back of the furnace
than at the front so that the air spaces between the bars at the front end of the
furnace are wider than those at the back end to equalise combustion throughout the
furnace.
The slicer shown in elevation Figure 3 and in plan Figure 4 is made in the form
of a plough share I on a handle J with a broad rib K on the top side at right angles
to the blade so that the point L enters the groove between the bars and forces its
way under the clinker breaking it up and turning it over by means of the broad
rib K on the upper edge. Stops M are placed at the back end of the blade of the
slicer on each side to prevent its sinking too deep between the bars
Having now described the nature of my said Invention and in what manner-the
same is to be performed I declare that I claim
First The construction or formation of furnace bars in two pieces and with
continuous air spaces as shown in the annexed drawings said bars being
supported and arranged with diminishing air space from front to rear as
and for the purposes described

page_text: Secondly The construction and employment of a clinker tool of the shape or
arrangement shown in the annexed drawings as and for the purpose
described.
Thirdly The formation of air spaces of diminishing width from front to rear
between furnace bars by tapering the bars gradually from front to rear
of furnace.
Fourthly The arrangement of the front ends of the furnace bars raised above the
dead plate to facilitate the introduction of a slicer for the purposes
explained.
In witness whereof I the said Fountain Livet have hereunto set my hand and
seal this eighth day of August in the year of our Lord One thousand eight
hundred and eighty three.