Improvements in Dust Separating and Collecting Apparatus.
Year: 1895

page_text: Date of Application 17th June, 1895
Complete Specification Left, 21st Feb., 1896-Accepted, 11th Apr., 1896
Improvements in Dust Separating and Collecting Apparatus.
We WILLIAM NEEVES of 13 Highfield Street, Leicester, Manager and
ALFRED POCHIN of Fern Bank, Princess Road, Leicester, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has reference to machinery or apparatus for separating dust and
other solid particles from air and collecting same.
The separating and collecting apparatus to be hereinafter described is adapted
for use in connection with buffing or abrading machines used for dry scouring the
soles and heels of boots and shoes during the manufacture thereof so that the
face of the leather is removed, by the abrasive material, in the form of dust and
fine particles. The invention is also applicable for use in connection with mills and
factories in which solid particles are discharged from machines as in the sawing
and planing of wood, cleaning of grain and like operations.
A dust separating and collecting apparatus constructed in accordance with our
invention may consist of a cylinder or cylindrical chamber in which the separator
and collector are divided by a diaphragm, baffle-plate or the like attached prefer-
ably to the internal surface of the said chamber in such a manner as to leave a
space between the sides of the latter and the edge of the baffle-plate through which
the solid particles may pass into the lower part of the said chamber which may be
termed the dust collector.
Within the upper part of the said cylinder there may be a second cylinder
of smaller diameter attached either to the lid or to the sides of the former and
the space between the two cylinders constitutes the separating chamber.
The smaller cylinder referred to reaches downwardly towards and in close
proximity to the baffle-plate, sufficient distance being allowed between them to
permit the air to ascend up the said smaller cylinder and escape.
The dust-laden air enters the separating chamber with considerable momentum
through a preferably tangential opening or pipe connected thereto and assumes a
whirling motion within the said chamber whereby the dust and heavy particles are
driven against the sides of the chamber and fall into the dust collector beneath
while the freed-air passes between the baffle-plate and the smaller cylinder and
upwards within the latter and thereby escapes.
The smaller cylinder and the baffle or deflecting plate or either or both of them
may be formed with a flange or skirt directed towards the sides of the cylinder
so as to further assist the dust to the collector. The discharge opening for the
air may consist of a tube, collar or sleeve extending within and also if desired
outside the cylinder and a suitable door may be formed in the collector through
which to remove the dust.
According to a modification the smaller cylinder may be arranged so as to be
rotatable and be driven by a belt or suitable gearing.
Dated this 17th day of June 1895.
BOULT & WADE,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Dust Separating and Collecting Apparatus.
We, WILLIAM NEEVES of 13 Highfield Street, Leicester, Manager and
ALFRED POCHIN of Fern Bank, Princess Road, Leicester, Engineer, 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 has reference to machinery or apparatus for separating dust and
other solid particles from air and collecting same.
The separating and collecting apparatus to be hereinafter described is adapted
for use in connection with buffing or abrading machines used for dry scouring the
soles and heels of boots and shoes during the finishing thereof so that the face of
the leather is removed, in the form of dust and fine particles. The invention is also
applicable for use in connection with mills and factories in which solid particles are
discharged from machines as in the sawing and planing of wood, cleaning of grain
and like operations.
The invention will be understood from the following further description in
reference to the accompanying drawings in which
Figure 1 is a view partly in elevation and partly in section on the line 11 of
Figure 2.
Figure 2 is a plan view, with the lid and attached cylinders DJ removed, of a
dust separator and collector constructed in accordance with this invention.
Figure 3 is an elevation partly in section on the line 3 3 of Figure 4, and
Figure a horizontal section, on the line 4 4 of Figure 3, of a modification.
Like letters of reference indicate corresponding parts throughout the drawing.
A represents a cylinder and B a tube in the upper end thereof disposed
tangentially thereto, through which the current of combined dust and air enters the
separator.
.
C is the lid which may be fixed thereto or formed with a depending flange C₁ to
fit round the internal or external surface of the cylinder A and to permit of being
removed therefrom when desired.
D is a downwardly depending cylinder whose upper end is attached to the inner
surface of the lid C.
This cylinder is fixed preferably concentrically with the cylinder A and extends
below the inlet tube B so that an annular space E is left between the two
cylinders A D which space constitutes the separating chamber.
A diaphragm or baffle plate F is arranged within the said cylinder A a short
distance below the cylinder D so as to leave a space D', Figs. 1 and 3, between it
and the latter for the dust-freed air to escape as hereinafter described.
The baffle plate may be attached within the cylinder A in any suitable manner,
one method consisting in forming radial arms F' Figs. 1 and 2 therewith for
connection to the wall of the cylinder A.
The baffle plate F being of smaller diameter, than. the cylinder A spaces D2
Figs. 2 and 3 are left between them, formning thereby passages for the separated
dust to pass into the lower part G of the cylinder A which is designated the dust
collector.
It is obvious that instead of making the baffle plate as shown it might be made
of the same diameter as the internal diameter of the cylinder A so as to constitute
the floor of the upper part of the latter.
One or more openings or excisions would then be made in it to form a passage or
passages for the separated dust to get into the collecting chamber G underneath.
The baffle plate when made of smaller diameter than the cylinder A may be
provided with a skirt or flange F 2 Figs. 1 and 2 inclined towards the side of the

page_text: cylinder A, or the lower end of the inner concentric cylinder D may be constructed.
with a similar skirt or flange so that any dust driven against it may be directed to.
the side of the cylinder A and to the passages in the baffle plate F and thus the
more readily introduced into the collecting chamber G below.
H Figs. 1 and 4 represents an escape opening in the lid C for the purified air to.
pass away.
Into this opening there may be fitted a pipe J which may extend for a short.
distance outside the apparatus and also within the inner cylinder as shown in
Figures 1 and 3, in the latter case to serve as an obstacle to very light particles of
dust escaping with the outgoing air-current.
The collecting chamber G is provided with a door which may be such as G.
slidable vertically in guides G 2 attached to the cylinder or of other suitable.
construction to permit of the accumulated dust being removed at intervals.
The dust laden air enters the annular separating chamber E through the inlet.
tube B with considerable velocity derived from a fan in the well known manner.
When inside the said chamber E the combined air and dust assume a whirling.
motion in which the dust or heavy particles. are driven against the sides of the
chamber and eventually descend and pass through the spaces D 2 left between the
baffle plate and the side of the cylinder A or through the openings in the baffle-
plate as hereinbefore mentioned when such are employed, into the collecting.
chamber G below.
-
The purified or dust freed air passes through the space D¹ left between the-
bottom of the cylinder D and the baffle plate F and escapes through the opening H
or the tube J when the latter is fixed therein as described.
It is preferable, although not absolutely essential to employ the escape tube J.
depending downwardly within the cylinder D as in Fig. 1 as it affords additional
impediment against the escape of any particles of light dust with the air.
In the modification illustrated in Figures 3 and 4 the baffle plate F is shown
with a vertically depending flange F 2 and has also a collar or ring F 3 attached.
thereto by a series of arms F 4.
The said collar is arranged to fit tightly on the outer circumference of the
cylinder D and upon pressure being applied thereto it can be moved up or down,
on the said cylinder so as to reduce or enlarge the depth of the passage D' between
the latter and the baffle plate for the escape of the freed air.
In some cases we provide slots or openings D 3 in the cylinder D for the escape
of the freed air (one only being shown in the drawings) which openings are-
particularly useful when more than ordinary pressure of air is set up within the
upper part of the separating chamber.
While however these slots relieve any excessive pressure of air they increase the-
facilities for dust particles escaping with the air current and to counteract this we.
employ a supplementary cylinder K attached preferably to the lid C concentrically
with the escape opening H and optionally provided with one or more slots or
openings K through which as well as underneath the said cylinder, the outgoing
air current may pass on its way to the escape or outlet tube J.
In connection with the openings D3 K₁ we may provide an inwardly inclined lip.
or screen K 2 which forms a deflector to the said openings arranged so that the
entrance to the latter is in a direction opposite to that in which the incoming
current is travelling as clearly indicated by the arrows in Figure 4.
It therefore follows that any dust laden air passing through the said openings.
will in consequence of changing its direction of travel, lose its momentum to a very
large extent so that the dust particles can fall below..
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we.
claim is :-
1. In apparatus for separating dust from air the combination of an annular
separating chamber, an inlet for the dust laden air, an outlet for the freed air and.

page_text: a collecting chamber, for the reception of the separated dust, communicating with
the said annular chamber substantially as described.
2. In apparatus for separating dust from air the combination of two concentric
cylinders, between which the dust laden air is introduced and separated, one or more
openings in or under the internal cylinder for the escape of the purified air and one
or more openings in the floor of the said cylinders for the passage of the separated
dust into a collecting chamber underneath substantially as described.
3. In apparatus for separating dust from air, an annular separating chamber
formed between two concentric cylinders, an inlet thereto for the dust laden air,
the inner cylinder having one or more passages or openings for the escape of the
purified air, and a skirt or lower end directed towards the outer cylinder for
the dust to pass into a collecting chamber communicating therewith substantially as
described.
4. In apparatus for separating dust from air, a cylinder divided by a fixed or
vertically adjustable diaphragm or baffle plate into two chambers, a concentric
cylinder in the upper chamber, an annular chamber between the said two cylinders
into which the dust laden air is introduced, an outlet in or under the inner
cylinder for the purified air and a passage or passages in the diaphragm or between
it and the outer cylinder for the dust to pass into the collecting chamber substan-
tially as described.
5. In apparatus for separating dust from air, a cylinder, one or more concentric
cylinders in the upper part thereof, an inlet for the, dust laden air, one or more
openings in the walls of the inner cylinders for the escape of the dust-freed air,
deflective flaps or screens for the said openings, a diaphragm in the outer cylinder
and underneath the concentric cylinders, a space around the said diaphragm or
one or more openings in the latter to permit the dust to pass into the collecting
chamber below substantially as described.
6. The improved dust separator and collector constructed and arranged substan-
tially as described and illustrated in Figs. 1 and 2 of the accompanying drawings.
7. The improved dust separator and collector constructed and arranged sub-
stantially as described and illustrated in Figs. 3 and 4 of the accompanying
drawings.
1549
no ot נע
Hobro HIZ EXUA
WILLIAM NEEVES.
ALFRED POCHIN.
Witness-
E. N. LEWIS,
Berridge Street Chambers, Leicester.
Boult & Wade,
Agents for the Applicants.