Improvements in Dust Collecting Apparatus.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Dust Collecting Apparatus.
We, THOMAS WILLIAM FREEMAN, of 13, West Bar, Banbury, Oxford, Miller,.
and JOHN PERRY, of 16, Bridge Street, Banbury, Oxford, Builder, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to apparatus for collecting dust from currents of air,
and it consists in interposing at or about right angles to the air current a
series of surfaces formed as vertical grooves so that the air in impinging upon
such surfaces is caught in the said grooves and is made to deposit its dust therein.
A series of such grooved surfaces are arranged in a row with vertical spaces
between them and behind such row is arranged a second row, the grooved surfaces
of which are situated behind the spaces between the surfaces of the front row,
so that as the air after impinging upon the grooves of the front row passes on
through the spaces thereof, it is made to impinge upon the grooves of the second
row, and in like manner any desired number of rows of such grooved surfaces
may be arranged one behind the other, so that the air will come successively in
contact with all of them and may thus be made to deposit the whole or greater
part of its dust before leaving the chamber containing the surfaces.
The vertical grooves are made with smooth surfaces and of impermeable
material so that the air does not pass through them, it being essential that the
collected dust shall adhere as little as possible to the surfaces but shall slide..
down as it collects, into a receptacle provided below. The surfaces may for this
purpose be conveniently made of corrugated sheet metal.
In horizontal cross section the said surfaces may either be made straight or
curved, with either the convex or the concave surfaces presented to the air, or
the surfaces of one row may be made curved and those of the next row straight.
As the air in passing froni the one row of surfaces to the next will also pass
in contact with the backs of the surfaces, we may in some cases with advantage
also form such backs with grooves in which some of the dust will collect.
We, in some cases provide any suitable known devices for tapping or jogging
the grooved surfaces from time to time in order to cause the collected dust to
fall down therefrom in the event of its adhering to a certain extent thereto.
Each row of corrugated surfaces has its bottom fixed to a separate receptacle
or hopper so arranged that although the dust can fall freely through the space
between two rows, the air current is prevented from passing underneath the
lower edge of the one row and up into the space between it and the next row.
And in like manner the spaces between the rows are entirely closed at top so.
that the whole of the air is forced to pass between the successive rows in the
manner above described.
Dated this 23rd day of August 1899.
ABEL & IMRAY,
Agents for the Applicants.

page_text: Improvements in Dust Collecting Apparatus.
We, THOMAS WILLIAM FREEMAN, of 13, West Bar, Banbury, Oxford, Miller,
and JOHN PERRY, of 16, Bridge Street, Banbury, Oxford, Builder, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to apparatus for collecting dust from currents of air,
and it consists in interposing at or about at right angles to the air current a
series of surfaces formed as vertical grooves so that the air in impinging upon
such surfaces is caught in the said grooves and is made to deposit its dust therein.
A series of such grooved surfaces are arranged in a row with vertical spaces
between them and behind such row is arranged a second row, the grooved surfaces
of which are situated behind the spaces between the surfaces of the front row,
so that as the air after impinging upon the groove of the front row passes on
through the spaces thereof, it is made to impinge upon the grooves of the second
row, and in like manner any desired number of rows of such grooved surfaces
may be arranged one behind the other, so that the air will come successively in
contact with all of them and may thus be made to deposit the whole or greater
part of its dust before leaving the chamber containing the surfaces.
The vertical grooves are made with smooth surfaces and of impermeable
material so that the air does not pass through them, it being essential that the
collected dust shall adhere as little as possible to the surfaces but shall slide
down as it collects, into a receptacle provided below. The surfaces may for this
purpose be conveniently made of corrugated or fluted sheet metal.
In horizontal cross section the said surfaces may be made either straight or
curved, with either the convex or the concave surfaces presented to the air, or
the surfaces of one row may be made curved and those of the next row straight.
A V-shaped surface may also be substituted for the curved surface.
As the air in passing from the one row of surfaces to the next will also pass
in contact with the backs of the surfaces, we may in some cases with advantage
also form such backs with grooves in which some of the dust will collect.
In the accompanying drawings Fig. 1 is a side elevation partly in section, of
a dust collector constructed in accordance with this invention; Fig. 2 is a trans-
verse section Fig. 3 is a plan, partly in section, and Fig. 4 is a detail sectional
view of the collecting surfaces drawn to an enlarged scale.
Below the casing a is a V-shaped trough divided into compartments by
transverse partitions and having a worm conveyor d along its bottom. The
corrugated or fluted collecting surfaces e, in this instance of semicircular cross
section, are arranged as shown in Fig. 3 and are supported on the partitions c,
being held in this position by the cover f of the casing, into grooves in which
their upper ends fit. It will be understood that there is no flooring between the
casing and the trough ; but in order to prevent the air from circulating
vertically among the collecting surfaces baffle plates y are inserted at the bottom
of each collecting surface. These baffle plates are also semicircular but of shorter
radius than that of the collecting surfaces, so that there is left a passage at the
bottom of each fluting through which the dust may fall into the trough as shown
by the full arrows in Fig. 1. The dust can also fall freely down the spaces 7
between the rows of collecting surfaces as shown by the dotted arrows in Fig. 1.
The air is thus compelled to travel from the inlet h, in a direction approximately
at right angles to the collecting surfaces, as shown by the arrows in Fig. 3, to
the opposite end of the casing whence it passes into the chamber i formed at the

page_text: top of the casing and away through the outlet k. Only such air as can pass up
the spaces between the flutings will have a vertical direction. Owing to the con-
siderable capacity of the chamber the velocity of the air is here diminished and
the last portions of dust settle.
In some cases it may be desirable to provide any suitable known devices for
tapping or jogging the grooved surfaces from time to time in order to cause the
collected dust to fall down therefrom in the event of its adhering to a certain
extent thereto.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In dust collecting apparatus rows of vertically grooved surfaces so arranged
within a casing that the dust laden air passes between the surfaces of each row and
impinges upon the surfaces of the next row, substantially as and for the purpose
described.
2. A dust collecting apparatus constructed and operating as herein described
and illustrated.
Dat
011
1000
ABEL & IMRAY,
Agents for the Applicants.