An Improvement in Fan Apparatus for Clearing Air from Dust.
Year: 1893

page_text: Date of Application, 19th Aug., 1893-Accepted, 24th Mar., 1894
HION.
[Communicated from abroad by HENRY SIMON, of Villa Simon, Brieg, Breslau, in
the Empire of Germany, Engineer.]
An Improvement in Fan Apparatus for Clearing Air from Dust.
I, OLIVER IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent 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 :-
This invention relates to a construction of fan which may be combined with a
dust collector in such a manner that when the air upon which the fan acts is laden
with dust, a separation and collection of the dust are effected, the air discharged
from the fan being thus cleared or nearly cleared from dust. For this purpose I
employ apparatus such as I shall describe referring to the accompanying
drawings.
Fig. 1 is a plan, Figs. 2 and 3 are vertical sections respectively on X X and Y Y
of Fig. 1.
A is the channel by which dust laden air passes to the central opening B of the
fan casing, within which revolves the fan consisting of a conical plate C with
blades D projecting therefrom. In the casing beyond the edge of the plate C
there is formed an annular pocket E from which a tangential channel F leads to a.
dust collector G of the kind known as "The Cyclone" the channel F entering it
tangentially.
The air and dust being put into rapid rotation by the blades D and driven past
the edge of C into the pocket E, the dust in virtue of its greater gravity is caused
by the centrifugal force to hug the outer side of the pocket, and when the current
is caused to return from the bottom of the pocket, as it is still whirling, any dust
that may be accompanying the return current is still driven outwards, so that the-
tendency is for all the dust to gather to the corner e of the pocket and as it sweeps
round to issue with some of the air by the channel F, the main body of the air
freed from dust or nearly so issuing from the fan case by the passage H. The
dust entering the collector G becomes separated from the air accompanying it and
issues from the bottom of G while the air freed from dust escapes by the central
channel g.
The pocket E instead of having only one channel such as F leading from it, may
have numerous openings or may be open all round into an annular channel indicated
by the dotted lines Q entirely surrounding the fan case and communicating with
the channel F. In cases where there is no necessity for clearing from dust the
small quantity of air escaping by F, the dust collector G may be dispensed with.
The apparatus which I have herein described is described also in the as yet
unpublished Specification of my foreign correspondent's Application No. 19388 of
1892 and is therein claimed as part of a grain cleaning apparatus. As the-
apparatus is also applicable for dealing with dust-laden air other than that
proceeding from grain cleaning apparatus 1 desire now to claim the apparatus.
generally.
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 :-
Apparatus for clearing air from dust consisting of a fan having around its edge.
a narrow annular massage leading into an ennulau noakst

page_text: which pocket the rapidly rotating air flows forwards then backwards, the dust,
along with a portion of the air, escaping by an outlet from the pocket, substantially
as described.
201
1
1000
ABEL & IMRAY,
Agents for the Applicant.