Improvements in Apparatus for Producing Ferro-ferric and Ferric Oxides.
Year: 1894

page_text: Date of Application, 6th Feb., 1894
Complete Specification Left, 6th Nov., 1894-Accepted, 8th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Producing Ferro-ferric and
Ferric Oxides.
I, ATKINSON CROSSLEY, of Beili-Glas, Cwmavon, in the County of Monmouth,
Manufacturing Chemist, do hereby declare the nature of this invention to be as
follows:-
My present invention relates to improvements in the apparatus for producing
ferro-ferric and ferric oxides, for which Letters Patents were granted to me, dated
July 28th A.D. 1891, and numbered 12,813.
In the Specification and drawings of the said Letters Patent are described and
shewn cylinders or tubes inclined at an angle so that the powdered salts from which
the ferro-ferric or ferric oxides are to be obtained can be fed in at the upper end
of one cylinder (which is made to revolve continuously upon its axis) and slowly
descends to the lower end, whence it passes into the upper end of a similar revolving
cylinder, inclined at the opposite angle, down which it passes to a discharge
opening, or to the upper end of a third cylinder inclined in the same direction as
the first one, and so on successively through as many cylinders as are necessary to
complete the oxidation of the salts.
The revolving tubes are heated in furnaces so arranged that the tubes are heated
as evenly and uniformly as possible.
My present invention has for its object more particularly an improved method of
construction by which the revolving cylinders or tubes are heated evenly and
uniformly with greater certainty, the revolving metal tubes being protected from
direct contact with the flame.
For this purpose I surround each of the cylinders or tubes with a casing of fireclay.
or other material sufficiently refractory to heat, the inside of the casing being at a
sufficient distance from the tube to prevent it from interfering with the revolution
of the latter, whilst its outside is exposed to the heat of the furnace.
In this way a perfectly even, uniform, and steady heat is communicated to the
revolving tubes and their contents and the product obtained is of the highest and
most uniform character.
The heat from the furnace may be made to surround the refractory casings
described, on its way to the chimney, or the casings may be so arranged as to form
flues, round and along which the heat passes.
Any convenient kind of fuel, either solid or gaseous may be used, and the firing
may be effected at one or both ends of the apparatus, or at the side or sides.
By my invention, the ferro-ferric or ferric oxide produced is very pure and
uniform in quality, and the apparatus is durable, effective, and economical in use
and in fuel.
Dated this 3rd day of February 1894

page_text: Improvements in Apparatus for Producing Ferro-ferric and
Ferric Oxides.
J, ATKINSON CROSSLEY, of Beili-Glas, Cwmavon, in the County of Monmouth,
Manufacturing 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, and accompanying drawing, that is
to say :-
My present invention relates to improvements in the apparatus for producing
ferro-ferric and ferric oxides, for which Letters Patent were granted to me, dated
July 28th, A.D. 1891, and numbered 12,813.
In the Specification and drawings of the said Letters Patent. are described and
shewn cylinders or tubes inclined at an angle so that the powdered salts from which
the ferro-ferric or ferric oxides are to be obtained can be fed in at the upper end of
one such cylinder (which is made to revolve continuously upon its axis) and slowly
descends to the lower end, whence it passes into the upper end of a similar revolving
cylinder, inclined at the opposite angle, down which it passes to a discharge opening,
or to the upper end of a third cylinder inclined in the same direction as the first
one, and so on successively through as many cylinders as are necessary to complete
the oxidation of the salts.
The revolving tubes are heated in furnaces so arranged that the tubes are heated
as evenly and uniformly as possible.
My present invention has for its object more particularly an improved method of
construction by which the revolving cylinders or tubes described are heated evenly
and uniformly with greater certainty, the revolving tubes being protected from
direct contact with the flame.
The accompanying drawing is in illustration of my present invention, Figure 1 being
a longitudinal section through apparatus of the kind described, and shewn in my said
former Specification, but with my present improvements added thereto, a being the
furnace, b, b, the end walls of the same, c, c¹, c², c³, revolving tubes, a sockets or
bearings in which the tubes revolve, e supply hopper, fhoppers or guides, g delivery
shoot, h, i, k driving wheels and gear, and I, 1, fireplaces.
In order to put my present invention in operation, I surround each of the
cylinders or tubes c, c¹, c², c³, with a casing m of fireclay or other material
sufficiently refractory to heat, the inside of the casing m being at a sufficient
distance from the tube to prevent it from interfering with the revolution of the
latter, whilst its outside is exposed to the heat of the furnace.
In this way a perfectly even, uniform, and steady heat is communicated to the
revolving tubes and their contents, and the product obtained is of the highest and
most uniform character.
The heat from the furnace may be made to surround the refractory casings
described, on its way to the chimney, or the casings may be so arranged as to form
flues, round and along which the heat passes.
Any convenient kind of fuel, either solid or gaseous may be used, and the firing
may be effected at one or both ends of the apparatus, or at the side or sides.
By my invention, the ferro-ferric or ferric oxide produced is very pure and
uniform in quality, and the apparatus is durable, effective, and economical in use
and in fuel.
I do not confine myself to the precise details, form and proportion of the several
parts, which may be varied more or less as may be found advisable, but

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
In combination with the apparatus for producing ferro-ferric and ferric oxides
described and claimed in the Specification of Letters Patent No. 12,813, A.D. 1891,
the external casings m surrounding the cylinders or tubes c, c¹, c², c³, substantially
in the manner and for the purpose described, and illustrated.
Dated this 5th day of November 1894.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.