An Improved Dust Collector.
Year: 1891

page_text: Date of Application, 31st Mar., 1891-Accepted, 2nd May, 1891
COMPLETE SPECIFICATION.
An Improved Dust Collector.
I, HEINRICH SECK of No. 15 Lenbuitzer Strasse, Dresden in the Kingdom of
Saxony, Empire of Germany, 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 dust-collector for collecting and removing
the dust from the air and from middlings-purifiers or the like, and the object is to
devise a simple, effective and cheap apparatus for this purpose.
My invention, therefore, consists in providing a drum or receptacle circular or
curved in transverse section having on its periphery an inlet opening into the same
to cause the dust-laden air, on entering the said drum through the inlet opening, to
strike the edge of a wedge-shaped or equivalent device having diverging surfaces
within the said drum, and thereby causing the said air to be divided into diverging
currents each of which will rotate along the inner wall or walls of the drum in a
substantially lateral or opposite direction until it will ultimately reach the end or
ends of the said drum, the dust being there discharged through openings preferably
arranged in the lower part of the drum whilst the air freed from the dust will escape
from openings preferably provided in the heads or ends of the said drum.
In the accompanying drawing
Figure 1 is a vertical section
Figure 2 a horizontal longitudinal section, and
Figure 3 a vertical transverse section of a dust collector embodying my
invention.
A designates a cylindrical casing or drum having on its periphery an inlet
opening for the dust-laden air and provided below with openings provided with
a sack or other suitable receptacle for receiving the dust discharged therefrom, and
having on its heads or ends outlet openings g for discharging the air freed from
dust.
The said inlet & consists of a conduit the continuation of which within the said
drum follows the inner periphery of the same for a distance in a direction rectangular
or nearly rectangular to the longitudinal axis of the drum, and is formed by the
cylindrical or curved portion of the drum, the side plates 61, 61, and the curved
plate c. Opposite to the discharge end of the said inlet or conduit & is arranged a
wedge-shaped or equivalent device d preferably fastened to or forming part of the
inner wall of the drum and directed with its edge or narrow part towards the said
inlet b.
The current of dust-laden air introduced into the apparatus under pressure in
any desired and well known manner, after leaving the inlet or conduit b, is on
striking the edge of the said wedge-shaped device d, split or separated into two
diverging currents each of which, in continuing its course along the inner periphery
of the drum, is pressed in a lateral or opposite direction and in consequence
assumes a spiral course of movement as indicated by the arrow I in the drawing.
Each of the separated currents in thus winding along the inner periphery of the
drum is held closely against the same until they finally reach the outlet openings e,
provided at the ends of the drum below and having preferably each an overhanging
plate e so as to give the openings e the form of a split or fissure. The current of
air will strike against the free end of the plate e¹ and the dust, by reason of the
centrifugal force, tending to the outside of the circle or curve of its movement, will
in following the law of gravity, drop through the openings e and through the
pipes in the direction of arrow II, into sacks or other suitable receptacles below,
while the air thus freed from its dust, will recoil from the projecting plate e' (as

page_text: indicated by arrow III) and escape through the lateral openings g further above
9.
in conjunction with the volume or body of pure air formed within the moving
spiral of dust pressed against the inner periphery of the drum by centrifugal
action.
It will be readily understood that without departing from the nature of my
invention I may arrange the drum in a vertical or any other position instead of in
a horizontal position as shown, and that the shape of the drum itself and the several
parts may be varied according to circumstances.
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:-
First. A dust collector having wedge-shaped or other diverging surfaces
arranged within a drum so that the dust laden air introduced into the said 'drum
under pressure, on striking the said diverging surfaces, will be parted or divided
into several diverging currents each of which will thereby be given a spirally
rotating direction of movement which will cause the particles of dust to be carried
to the outside of the circle or curve of such movement to be ultimately discharged
through openings provided in the said drum, the air at the same time being thrown
back from the said openings to be discharged from the drum in a condition free
from dust.
Second. In a dust collector the combination with a casing or drum of curved
shape in cross section, of an inlet opening or conduit for the air to be freed from
dust, open at both ends and a wedge-shaped device or portion, having diverging
surfaces arranged opposite the discharge end of the said inlet opening or conduit
for dividing the current of air, slits within the drum or casing for discharging the
dust separated from the air and openings for allowing the air freed from dust to
escape from the said drum, substantially as set forth.
Third. In a dust-collector the combination, with a casing or drum of curved
shape in cross-section, of an inlet opening or conduit for the air to be freed from
dust, open at both ends and formed by a portion of the inner periphery of the said
drum and two side walls, and a wedge-shaped device or portion arranged opposite
the discharge end of the said inlet opening or conduit for dividing the current of
air, slits within the drum or casing for discharging the dust separated from the air
and openings for allowing the air freed from dust to escape from the said drum,
substantially as set forth.
Fourth. A dust-collector provided within with a wedge-shaped or similar
equivalent device or portion having diverging surfaces for dividing a current of
dust-laden air introduced under pressure and for transforming the vertically circular
or curved movement of the current into a spiral movement of the divided currents,
substantially as and for the purpose set forth.
Dated this 31st day of March 1891
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.