Improvements in the Construction of Kilns for Burning Limestone, Cement, and other similar materials.
Year: 1892

page_text: Date of Application, 16th Apr., 1892-Accepted, 21st May, 1892
COMEDY DAY
VAT
Improvements in the Construction of Kilns for Burning Limestone,
Cement, and other similar materials.
I JOHN BRIGGS of Bankfield House, Clitheroe, in the County of Lancaster,
Lime Burner, 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 of my improvements is to improve the construction of kilns and to
diminish the quantity of fuel required for burning limestone, cement, and other
similar materials.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the illustrative drawing hereunto annexed and the following explanation
thereof.
The drawing represents my improved kiln in vertical section. The kiln is open
at the top a with a gradual contraction towards the neck at 6 which is about one
third down the depth of the kiln, and is provided with hinged door c at the
lower end from which the burnt lime, cement, or other material is drawn.
The limestone, cement, or other material to be burnt or calcined is brought to
the top a of the kiln in trucks running on the tramway d, and is simply tilted into
the opening a no levelling, setting, or packing being required.
A small amount of coal is fed into the top a of the kiln with the limestone or
other material and the whole descends through the neck or contraction at 6 into the
calcining chamber e. The bulk of the coal required for burning or calcining
the limestone or other material is passed down the sloping shoots and entering
the kiln below the neck bis mixed with the bulk of the limestone or other material
and calcines it in the chamber e, the waste heat from which partially calcines the
fresh material entering between a and b.
The burnt or calcined lime or other material gradually descends to the bottom
of the kiln cooling as it falls and is drawn off by the door c.
Spaces or openings 9 are left at the top of the doors to allow extra air to enter
the kiln for cooling the lime and to cause better combustion of the fuel in the
calcining chamber e; hare cast iron covers which are placed over the mouths of
the coal shoots fleading into the kiln.
Arched or long bricks may be used to build the dome i over the calcining
chamber e and in constructing this kiln at least two feet thick of clay only should
be used behind the brick lining to prevent the heat from escaping except in an
upward direction. The heat from the kiln will burn this into a hard mass and
keep it compact which will be found very useful when repairs are necessary to
the kiln.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that- what I
claim is :-
The general novel construction and arrangement of the kiln as above described
and illustrated by the drawing annexed whereby I am enabled to effect a con-
siderable economy in the quantity of fuel required.
Dated this 14th dow of Anvil 1800
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.