Improvements in or Appertaining to Apparatus for Dust Collecting."
Year: 1897

page_text: Date of Application, 26th Jan., 1897
Complete Specification Loft 23rd Ont 1907 Ancantad 1th Do
1007
Date of Application, 26th Jan.,
Complete Specification Loft, 23rd Oct. 1907
1897
Accepted,
Ath Doc
Doc, 1907
66
PROVISIONAL SPECIFICATION.
Improvements in or Appertaining to Apparatus for Dust
Collecting."
I, JAMES HIGGINBOTTOM of 32 Seel St. Liverpool in the County of Lancaster,
Milling Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention is applicable to that class of dust collectors which operate as in
the case of the well known Cyclone Dust Collector, in which a dust laden current
of air is caused to attain a whirling motion and in which the centrifugal force
developed in the dust particles causes them to become aggregated and separated
by frictional contact with the interior walls or surfaces of the Cyclone.
One of the objects of my invention is to obtain a greatly increased interior area
of separating or frictional surface in comparison with the area of the main conduit
which carries the current of dust laden air to the apparatus.
In carrying out my invention, I make a series of cyclones, each having an
admission aperture communicating with the said main conduit and I make the
united areas of these apertures preferably equal in area to the area of the main
conduit.
I preferably form the interior walls or surfaces of each cyclone of a circular
shape, also I form a centre tube or opening at or near the centre of the upper ends
of each cyclone communicating with the outer atmosphere and with the interior
of its cyclone for the discharge of dust freed air.
I make the lower ends of each of the cyclones to communicate with one or more
dust collecting or depositing compartments and I arrange to discharge the
deposited dust therefrom by means of a flap or flaps or valves.
By subdividing the main conduit and making a series of smaller diameter
cyclones I also obtain the second object of my invention, which is to cause the
whirling air in the interior of each of the series of cyclones to make a greater
number of complete revolutions before being discharged, thus the centrifugal
force in the dust particles is considerably increased and a consequent better
separation of the dust is obtained.
66
Improvements in or Appertaining to Apparatus for Dust
Collecting."
I, JAMES HIGGINBOTTOM of 32 Seel Street, Liverpool in the County of Lancaster,
Milling Engineer, do hereby declare the nature of this invention and in what
[Price 8d.1

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:—
This invention is applicable to that class of dust collectors which operate on the
wellknown principle in which a dust laden current of air is caused to attain a
whirling motion and in which the centrifugal force developed in the dusty particles
causes them to become aggregated and separated by frictional contact with the
interior walls or surfaces of the vortex chamber. One of the objects of my inven-
tion is to obtain a greatly increased interior area of separating or frictional surface
in comparison with the area of the main conduit which carries the current of dust
laden air to the apparatus.
In carrying out my invention I make a series of vortex chambers each having
an admission aperture communicating with the said conduit and I make the
united area of these apertures preferably equal in area to the area of the main
conduit.
The invention is best described by aid of the accompanying drawings, in which,
Figure 1 is a section of my apparatus longitudinally with the conduit;
Figure 2 a transverse section;
Figure 3 a plan; and
Figure 4 a section on a much enlarged scale of part of the vortex chamber.
In these, A is the conduit, B B admission apertures into the vortex chambers,
CC vortex chambers, D D exit tubes for the purified air, E hoppers into which the
dust falls. These can have at the base a self acting valve for discharging the
dust. The interior walls are preferably cylindrical. The central tube D is also
preferably cylindrical and dips down a considerable way into the vortex chamber,
and it may pass through the conduit and discharge to the outside air or to a second
conduit if desired. The lower ends of the vortex chambers are open to the
hoppers E. By thus subdividing the main conduit and making a series of vortex
chambers of smaller diameter I also obtain the second object of my invention,
which is to cause the whirling air in the interior of each of the series of vortex
chambers to make a greater number of revolutions before being discharged, thus
the centrifugal force in the dust particles is considerably increased and a
consequent better separation of the dust is obtained.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
The combination with a conduit or other space containing dusty air of a plurality
of vortex chambers with tangential orifices opening into the said conduit or space
preferably in the direction exactly facing the direction in which the dusty air
travels and having an escape for the dust at the bottom into one or more quiet
chambers, and an exit for the air at the top dipping down into the vortex chamber
and escaping to the outer atmosphere or to a second conduit.
Dead sh: 001
1007
W. P. THOMPSON & Co.
Patent Agents of Liverpool, Manchester, Birmingham and London.