An Improved Construction of Kiln for Drying Moist Materials.
Year: 1890

page_text: Date of Application, 16th Aug., 1890
Complete Specification Left, 6th Jan., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
An Improved Construction of Kiln for Drying Moist Materials.
I, GEORGE ARTHUR HART, of 31, Beverley Road, Hull, in the County of Yorks
Commission Agent, do hereby declare the nature of this invention to be a
follows :-
:―
My invention relates to an improved construction of kiln for drying moist or wet
materials such as guano, fish, blood cereals and other substances.
I construct the kiln of an outer building of brickwork stone or other suitable
material circular in form and closed by an arched or other roof with suitable
openings. At the bottom of this building and around the inner circumference I
arrange a series of furnace grates, preferably three, at equal distances apart with
suitable doors through the wall for feeding the furnaces regulating draft &c.
Above each furnace is arranged a baffle plate which serves not only to distribute
the heat uniformly over the kiln but also to prevent liquid dropping into the furnace
fires.
Immediately above these baffle plates I arrange a circular table of a diameter
equal to that of the kiln and mounted on a central shaft working in bearings at
bottom of the kilu and in a cross girder at top which table is caused to revolve.
The table is preferably made of a skeleton framework covered with a series of
segmental perforated plates of iron or glazed earthenware and is caused to revolve
slowly by means of suitable gearing applied either to the periphery of the table or
to the central shaft.
Above the table scrapers are arranged for turning the material over as the table
revolves and a further curved scraper is so arranged that it can be lowered on to
the table when required so that as the table revolves it scrapes the material off and
guides it through an opening at the upper part of the building into a shoot on a
platform erected on the outside of the building.
Dated this with day of August 1890.
ABEL & IMKAI,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Construction of Kiln for Drying Moist Materials.
I, GEORGE ARTHUR HART, of 31, Beverley Road, Hull, in the County of York,
Commission Agent, 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 :-
My invention relates to an improved construction of kiln for drying moist or wet
materials such as guano, fish, blood, cereals, and other substances.
I construct a kiln for this purpose as I shall describe referring to the accom-
panying drawings, Fig. 1 being a vertical section and Fig. 2 a plan. A is a circular
building of brick, stone or other suitable building material covered by a roof B
which may be of metal as shewn or might be built as a dome, having suitable
openings through it for escape of vapours and gases from the interior. C is a fire
place, of which there may be only one, as shewn, or several arranged around the
lower part of the structure, with fire and ash pit doors accessible outside. Above
each fire is a baffle plate D which serves to distribute the heat throughout the kiln
and prevents liquid or other matter from dropping into the fire. E is a circular
table mounted on a central shaft F which can revolve in a bearing G at the bottom
and a bearing H carried on a cross girder J. The table E is preferably made as a
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page_text: skeleton framework covered with segmental perforated plates which may be of iron
or glazed earthenware. On the underside of the table is a toothed circular rack K
with which gears a pinion L driven by any convenient motor so as to cause the
table E to revolve slowly. The outer edge of the table runs on rollers M free to
revolve on axles fixed in the outer wall.
Obviously, instead of driving the table by a pinion L and rack K, motion might
be communicated to the central shaft F, by bevil gearing arranged either above the
girder J, or under the table. Raking scrapers of any form suited to the material
under treatment may be fixed to the girder J projecting down from it so as nearly
to touch the table and to shift or turn over the material on the table.
Also a curved scraper N raised by rack & gearing P worked from outside, can
be lowered so as to guide the material from the revolving table towards one part of
the structure where it is delivered through an opening Q on to a shoot or into
receptacles outside the building.
Having now particularly described and ascertained the nature of this invention, and
in what manner the same is to be performed, I claim
--
A drying kiln consisting of a circular building with a fire or fires in its lower
part under a revolving table carrying the material to be dried, substantially as
described.
Dated this 6th day of January 1891.
ABEL & IMRAY,
Agents for the Applicant.