Improvements in Dust Collectors.
Year: 1892

page_text: Date of Application, 12th Mar., 1892-Accepted, 7th May, 1892
COMPLETE SPECIFICATION.
Improvements in Dust Collectors.
I, HEINRICH SECK of 15 Leubnitzerstrasse, Dresden in the Empire of Germany,
Manufacturer, 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 :-
My invention relates to an improved dust collector for collecting and removing
dust or other light particles from a moving current or body of air, the said
apparatus being particularly adapted for use in flour mills, either as a dust collector
proper for purifying the air in rooms or compartments containing dust-laden air, or
in direct combination with certain machines and apparatuses preferably such as are.
employed in the art of milling such as middlings purifyers.
The object of my said invention is to remove from the air contained in such
chambers or compartments, or from the material passing through such apparatus,
any dust or light particles which may tend to deteriorate the air or the material,
as the case may be.
My invention, therefore, consists in the combination with a suitable casing or
chamber communicating with the space containing the air or material to be freed
from dust or other particles, of a number of plates or webs obliquely arranged the
one above the other in series within such casing or chamber, the plane of each of
the said plates or webs of a series intersecting the plane of each adjoining plate or
web and the lower end of each lying directly opposite and at a certain distance
from the full surface of the plate or web directly below, the several series being
provided with intermediate resistances against which the current of impure air,
while being conveyed through the apparatus, impinges so as to be thereby deflected
laterally and in part deprived of its momentum, the dust or other substances or
particles carried along by the air being thus caused to become deposited on the
opposite oblique surface where they will be removed from the influence of the
current of air and whence they will slide down to be ultimately discharged into a
receptacle or receptacles containing air which is at rest, whilst the air of the
moving current will, in leaving the apparatus be free from the dust or other
particles.
In the accompanying drawing-
Figure 1 is a vertical section shewing my improved dust collector as applied to
a middlings purifier. As the details of construction of the latter apparatus are
immaterial and may be of any well known kind the upper portion of the same
only is shown in diagram, the lower portion being shown broken away.
Figure 2 is a similar sectional diagram of my improved dust collector showing
the same in that particular form of construction in which it is preferably employed
for removing the dust from the air of any room or compartment communicating
therewith.
In Figure 1 the current of air carrying the light particles along with it is
supposed to be produced by means of a suitable exhaust fan a or a similar device
sucking the air into the dust collector from the middlings purifier below, whilst
in Figure 2 the dust laden air is supposed to be blown into the apparatus
from below through an inlet a' by a fan blower or other suitable means not here
shown.
In both figures b designates a suitable casing open or partly open at the top and
provided with interior cross-pieces here shown as having a triangular cross
section, the said cross-pieces being arranged the one above the other in series
and having their ends secured to the walls of the casing. To these cross-pieces
are secured plates or webs d of wood, sheet metal or other suitable material in

page_text: such a manner as to extend therefrom obliquely and likewise arranged the one
above the other in series in such a manner as to cause the lower free end of each
plate or web to adjoin the upper surface of the next plate or web below, leaving
a small intermediate space between the two plates each of which spaces serves as
an outlet opening for the angular space above it, formed by the two respective
adjoining plates, whilst the lowermost plate or web of each vertical series terminates
above a separate space or receptacle here shown as constructed in the shape of a
receiving gutter or canal e which is closed towards the side whence the dust or
particles enter the dust collector and which gutter or canal, therefore, contains a
body of unmoved air. In order to admit of removing the dust or other particles,
collected in the said gutters from the different series of plates above, the same may
either be arranged in an inclined position and adapted to be shaken, or they may
each be provided with a conveyer, as indicated by in Figure 2.
The operation of my improved device is as follows:-The air carrying the dust
or light particles with it upon being sucked into the apparatus or blown into the
same as described enters between the several gutters e under a certain pressure
passing upward through the several vertical passages formed by the series of
plates or webs d. In passing along the said plates or webs the air impinges against
the lower inclined surfaces of the said plates and against the cross pieces
supporting the same and is thereby deflected in such a manner as to be directed
against the lower inclined surface of a higher plate of the opposite series and thus
to alternately impinge against the several plates of the one and the other series
until it escapes above.
In consequence of the resistance thus offered to the moving current of air its
impetus is temporarily arrested whereby the dust or other particles suspended
therein will by reason of their greater gravity be thrown in the direction of a
downwardly curved line whilst the current of air will continue its course in the
direction of an upwardly curved line. The solid particles thus discharged from
the current of air will, in striking against the upper surface of the plates, slide
down along the same into the angular spaces where they will be removed from the
influence of the air current, and will thence slide through the intermediate spaces
between each two adjoining plates from one plate to the other until they will
ultimately reach the respective collecting gutter e below to be subsequently
removed therefrom in any suitable manner.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. In a device for collecting or removing dust or other light particles from
a moving current or body of air a number of plates or webs arranged the one above
the other in series between an inlet and an outlet for the current of air, the said
plates or webs carrying near their upper ends and on their lower surfaces means
of resistance and being so arranged that the lowermost plate of each series will
terminate above one of a number of spaces containing air in a state of rest and
closed towards the side whence the air enters into the apparatus the lower end of
each of the other plates or webs of a series approaching the upper surface of the
next plate below it leaving an open intermediate space, and the planes of each two
adjoining plates intersecting each other at an acute angle substantially as and for
the purpose set forth.
Second. In a dust collector a casing having a lower inlet and an upper outlet
opening a number of series of transverse plates within the said casing having
resistances near the upper ends of their lower surfaces and so arranged that the
planes of each two adjoining plates of a series will intersect each other and the
lower end of each plate will approach the upper surface of the next lower plate
leaving an open intermediate space and a number of receptacles each arranged
below the lowermost plate of the several series substantially as described.
Third. In a dust collector the combination with a casing having a lower inlet

page_text: and an upper outlet opening of means for conveying a current of air through the
said casing a number of series of transverse plates therein having resistances near
the upper ends of their lower surfaces and so arranged that the planes of each two
adjoining plates of a series will intersect each other and the lower end of each
plate will approach the upper surface of the next lower plate of the same series
leaving an open intermediate space and of a number of receptacles each arranged
below the lowermost plate of the several series substantially as described.
Dated this 12th day of March 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.