Improved Apparatus for Drying and Mixing Bones and other Substances.
Year: 1890

page_text: Date of Application, 8th July, 1890
Complete Specification Left, 8th Apr., 1891-Accepted, 9th May, 1891
PROVISIONAL SPECIFICATION.
Improved Apparatus for Drying and Mixing Bones and other
Substances.
I, AMOS HERBERT HOBSON of 9 Victoria Street in the City of Westminster,
Analytical Chemist do hereby declare the nature of this invention to be as
follows :-
This invention relates to an improved apparatus for effecting in a simple effective
and continuous manner the drying and mixing of bones and other substances.
The apparatus consists of a cylindrical or other tubular vessel mounted to revolve
upon an inclined longitudinal axis and furnished with alternating sets of internal
baffles so arranged as to cause the substances to be treated to take a zig-zag course
through the revolving cylinder, the said substances being carried up to a certain
point by the revolution of the cylinder and allowed to drop, the substances so
passing from one set of baffle plates to the other alternately and becoming more or
less broken up or separated so as to expose fresh surfaces to the drying action.
These baffle plates are adjustable within the cylinder by external means, in order
that they may be readily set in planes perpendicular to its longitudinal axis or at
any suitable angle thereto according to the nature and condition of the substance
to be dried or mixed and the extent to which their passage through the apparatus
is to be prolonged.
The revolving cylinder communicates at its upper end with a feed hopper and
outlet flue, and at its lower end with a chamber provided with a balanced valve or
door for the exit of the matters treated and in communication with an inlet for
heated or dry air or for the waste gases from a furnace if the material is not of a
nature to be injuriously affected thereby. The revolving cylinder may also be
enveloped in a steam jacket or be exposed to direct heat if it is to be heated
externally as well as internally.
Means are provided for withdrawing the baffle plates from the cylinder for
cleaning.
Dated this 8th day of July 1890.
A. H. HOBSON.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improved Apparatus for Drying and Mixing Bones and other
Substances.
I, AMOS HERBERT HOBSON, of 9 Victoria Street, in the City of Westminster,
Analytical Chemist, 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
--
This invention relates to an improved apparatus for effecting in a simple
effective and continuous manner the drying and mixing of bones and other
substances in a granular or divided state, such as grain, dye-woods, ores, tea,
and coffee, for example.
The apparatus will be described with reference to the accompanying drawings,
forming part of this Specification, wherein
Figure 1 represents a part-sectional side elevation, and Figure 2 a cross-section,
of the apparatus.

page_text: Figures 3 and 4 illustrate a modification of a detail thereof.
The same reference letters denote like parts in all the figures.
The apparatus consists of a drum, of cylindrical or other section, A, made of
wrought or cast iron or copper or other suitable metal, mounted to revolve about
its longitudinal axis in an inclined position and furnished with alternating sets of
internal baffles or transverse partitions B1 B2 so arranged as to cause the substances
to be treated to take a zig-zag course through the revolving cylinder. For this
purpose the baffles or partitions of each set arc of approximately semi-circular form
so that they extend about half-way across the cylinder, more or less, the diametrical
edges of the one set being opposite the intervals between those of the other set and
both sets being so inclined with reference to the axis of the cylinder and each to
the other that, as the cylinder revolves, the said substances will be carried up a
certain distance and then allowed to drop so as to pass from one set of battle plates
to the other alternately and in so doing will, at same time, progress step by step
downwards along the cylinder, whereby fresh surfaces will be brought in contact
with the plates and drum and the said substances will be dried gradually, and, at
same time, be intimately mixed, if required. These baffle plates B₁ B may be
fixed, as represented in Figure 1, or they may be adjustable within the drum by
external means in order that they may be readily set at any suitable angle,
according to the nature and condition of the substance to be dried or mixed.
this purpose the plates would be pivoted as at b (Figures 3 and 4) and adjusted by
set screws or by other means whereby they may be fixed at the desired angle,
the plates being made independently adjustable so as to enable them to be adapted
to the varying condition as to moisture, of the material in its progress through
the drum.
For
The revolving drum A is mounted in suitable roller or other bearings and it is
driven by worm or other gear so as to receive slow rotary motion. The drum
communicates at its upper end with a feed hopper C and outlet flue and at its
lower end with a stationary chamber D provided with a balanced valve or door d,
which opens, when a sufficient quantity of the matters treated rests against it, for
the exit of the said matters, said chamber D being in communication with an
inlet E admitting air heated or dried by a stove F with or without the products of
combustion therefrom, or the waste gases from a furnace if the material is not of
a nature to be injuriously affected thereby. The revolving drum A may also be
enveloped in a steam jacket or be exposed to direct heat if it is to be heated
externally as well as internally.
The baffle plates may be secured in the cylinder by set screws in order to enable
them to be removed for cleaning.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is-
The herein described apparatus for drying and mixing bones and other
substances, consisting essentially of an inclined revolving drum having sets of cross
partitions as described, so arranged with regard to each other that as the drum
revolves the matters will be transferred from the one to the other set and at same
time pass along the drum in a zig-zag direction substantially as specified.
Dated this 8th day of April 1891.
Dated this on day of April 1891.
A. H. HOBSON.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.