IMPROVEMENTS IN FURNACES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said John Peter Cotiart at the
Office of the Commissioners of Patents on the 3rd February 1883.
JOHN PETER COTIART of Havana. "IMPROVEMENTS IN FURNACES
"
The object of my Invention is to construct furnaces in which green sugar cane
refuse and other waste material may be consumed for raising steam and other
beating purposes.
The firebars of the furnace are arranged in one or more layers so as to form
an inclined plane and may be supported at the end nearest the fire doors on
rollers carried by movable brackets. These rollers extend across the inside of
the furnace and the brackets which support them are secured to shafts which may
be actuated by worms and worm wheels or by balance weights or in any other
convenient manner in order to raise or lower the firebars to any required position:
this may be accomplished smoothly and without much friction: The upper shaft is
mounted in bearings in a box girder frame and the lower part of this frame may
form the lintel for doors at the front of the furnace. By this arrangement the
shaft may be easily removed when desired: the other shafts (when more than one
layer of firebars is used) may be made in two pieces coupled together to facilitate
removal: the other ends of the firebars clip over stationary bearing bars on which
they rest.
A horizontal tumbling plate and a small stationary inclined plate (both
perforated with slots) are placed below and beyond the furnace bars close to the
bridge.
The green sugar cane or other refuse is put into the top of the furnace (through
doors which are closed after its entrance by means of counter-weights) and falls on
the inclined firebars to be consuined.
In order to clean out the furnace and remove ashes the tumbling plate (which is
secured to a shaft) may be lowered when the ashes can be withdrawn through one
of the front doors of the furnace

page_text: The exterior of the furnace is constructed by preference of refractory materials
such as firebrick or silica.
The bridge of the furnace is built higher than usual and its upper end is inclined
and projects toward the furnace doors in order to deflect the flaine and heat on the
material to be consumed.
When more than one layer of firebars is used small sections of grid plates may
be suspended from the stationary bearing bars in order to admit air and to
prevent the green sugar cane or other refuse from working out at the back of the
layer of firebars next below.
Steam blasts are arranged so as to increase the draught in the furnace and thus
obtain that rapidity of combustion so necessary for consuming green and waste
refuse without previous drying.

page_text: JOHN PETER COTIART of Havana: "IMPROVEMENTS IN FURNACES
"
The object of my Invention is to construct furnaces in which green sugar cano
refuse and other waste material may be consumed for raising steam and other
heating purposes.
The firebars of the furnace are arranged in one or more layers so as to form an
inclined plane and may be supported at the end nearest the firedoors on rollers
carried by movable brackets. These rollers extend across the inside of the furnace
and the brackets which support them are secured to shafts which may be actuated
by worms and worm wheels or by balance weights or in any other convenient
manner in order to raise or lower the firebars to any required position: this may
be accomplished smoothly and without much friction. The upper shaft is mounted
in bearings in a box girder frame and the lower part of this frame may form the
lintel for doors at the front of the furnace. By this arrangement the shaft may be
easily removed when desired: the other shafts (when more than one layer of
firebars is used) may be made in two pieces coupled together to facilitate removal:
the other ends of the firebars clip over stationary bearing bars on which they rest.
A horizontal tumbling plate and a small stationary inclined plate (both
perforated with slots) are placed below and beyond the furnace bars close to the
bridge. The green sugar cane or other refuse is put into the top of the furnace
(through doors which are closed after its entrance by means of counter-weights)
and falls on the inclined firebars to be consumed.
In order to clean out the furnace and remove ashes the tumbling plate (which is
secured to a shaft) may be lowered when the ashes can be withdrawn through one
of the front doors of the furnace.
The exterior of the furnace is constructed by preference of refractory materials
such as firebrick or silica. The bridge of the furnace is built higher than usual and
its upper end is inclined and projects toward the furnace doors in order to deflect
the flame and beat on the material to be consumed.
When more than one layer of firebars is used small sections of grid plates may
be suspended from the stationary bearing bars in order to admit air and also
to prevent the green sugar cane or other refuse from working out at the back of
the layer of firebars next below.
Steam blasts are arranged so as to increase the draught in the furnace and thus
obtain that rapidity of combustion so necessary for consuming green and waste
refuse without previous drying.
And in order that my Invention may be fully understood and readily carried
into effect I will proceed to describe the accompanying two sheets of Drawings
reference being had to the figures and letters marked thereon.
Fig. 1 is a longitudinal section. Fig. 2 a plan partly in section. Fig. 3 a cross
section and Fig. 4 a front elevation of a furnace constructed according to my
Improvements in which two inclined layers of firebars are used and Fig. 5 is a plan
of the firebars.
In Figs. 1, 2, 3 and 4-a is the exterior wall of the furnace constructed
preferably of firebrick or silica and b is the bridge which is built higher than usual
with its upper end inclined and projecting toward the furnace doors in order to
deflect the flame and heat on the material to be consumed: c is the upper and d
the lower inclined layer of firebars; each layer is supported at the end nearest the
fire doors by rollers e and f which extend across the inside of the furnace and are

page_text: carried by movable brackets e¹ and f': the movable brackets e¹ and f¹ are secured
to shafts e² and f' respectively: these shafts have each a worm wheel at one end
which gears into a worm and thus enables the fireman readily to raise or lower the
firebars c and d into any required position or the firebars may be raised or lowered
by balance weights or in other convenient manner: this may be accomplished
smoothly and without much friction. The upper shaft e² is mounted in bearings in
a box girder frame g and the lower part of this frame forms the lintel for the
doors at the front of the furnace: by this arrangement the shaft may be easily
removed when desired. The lower shaft f2 is made in two pieces coupled together
to facilitate removal and is carried by bearings in wall boxes f³. The other ends
of the firebars c and d clip over stationary bearing bars i and j respectively on
which they rest. A horizontal tumbling plate and a small stationary inclined
plate (both perforated with slots) are placed close to the bridge below and
beyond the lower layer of firebars d. The green sugar cane or other refuse is put
into the top of the furnace (through doors which are closed after its entrance by
means of counter-weights) and falls on the inclined layers of firebars c and d to be
consumed.
When it is desired to clean out the furnace and remove the ashes the tumbling
plate (which is secured to a shaft 2 having bearings in wall boxes 13) may be
lowered by means of a worm wheel keyed or secured to the shaft 2 and actuated
from the outside of the furnace by a worm at the end of a shaft and the ashes
can then be withdrawn through one of the front doors h of the furnace. Small
sections of grid plates m are suspended from the stationary bearing bar i in order
to admit air and also to prevent the green sugar cane or other refuse from working
out at the back of the layer of firebars & next below. Steam blasts n are placed
on either side of the furnace so as to increase the draught and are arranged
preferably in the manner shown in Fig. 4 and thus insure that rapidity of com-
bustion so necessary for consuming green and waste refuse without previous
drying.
Having stated the nature of my Invention and described the manner of
performing the same I would have it understood that I do not limit myself to
the precise details given as the same may be varied or modified without departing
from the main features of my Invention and
I declare that I claim.
1. The improved furnace substantially as and for the purposes herein shown and
described.
2. The combination of the movable inclined firebars c and d, the deflecting
bridge and the tumbling plate with the steam blast or blasts n as and for the
purposes herein shown and described.
3. The combination of the movable inclined firebars c and d, the deflecting
bridge band the tumbling plate as and for the purposes herein shown and
described.
In witness whereof I the said John Peter Cotiart have hereunto set my hand
and seal this twenty sixth day of June One thousand eight hundred and eighty
three.