Year: 1886

page_text: Date of Application, 5th Apr., 1886.
Complete Left, 6th Dec., 1886.
Complete Accepted, 14th Jan., 1887.
WC, AUGUST CHRISTIAN NAGEL, REINHOLD HERMANN KAEMP and ADOLF
LINNENBRÜGGE, manufacturers, all three of Hamburg, German Empire, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to Dust-collectors operating by means of a current of air
produced by suction, and in which the filtering-surfaces are cleaned by a back-draught,
and the improvements consist in the particular means employed for creating the said
back-draught and for shaking the filtering-surfaces.
The said surfaces form the sides of a number of cells inserted with their upper
ends, which are open, into apertures arranged in a circle in a horizontal wall
constituting the partition-wall of two compartments. The lower one of those
compartments communicates with the dust-producing machine, the upper one with an
exhauster. Within the upper compartment is placed a vertical hollow cylinder
extending with its open upper end through the top of the compartment, or otherwise
permanently communicating with the outer air, and having a hollow arm arranged to
slide on the said partition-wall and to communicate by an aperture with any one of
the cells or with two or more at a time. The cylinder and its arm are rotated by
suitable. mechanism.
The result obtained by this arrangement is that the cell or cells registering with the
arm of the rotative cylinder will be in communication with the outer air, so that the
exhauster connected with the upper one of the aforesaid compartments, will draw air
from the outside through the cylinder, its arm and the said cell or cells into the lower
compartment, and thus create the desired back-draught. According as the arm moves
forward the cells are in this manner exposed to the back-draught in succession.
The means for shaking the cells consists in a hammer arranged to rotate with the
said cylinder and to strike against the cell or cells which are in communication with
the arm of the cylinder. This hammer is actuated by a rod passing centrally through
the bottom of the cylinder and operated by a suitable mechanism.
LAT

page_text: Improvements in Dust-collectors.
We, A. C. NAGEL, R. H. KAEMP, and A. LINNENBRÜGGE, manufacturers, all three
of Hamburg, German Empire, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described in and by the
following statement :-
Our invention relates to dust-collectors operating by means of a current of air
produced by suction, and in which the filtering-surfaces are cleaned by a back-draught,
and the improvements consist in the particular means employed for creating the said
back-draught and for shaking the filtering-surfaces.
On the annexed sheet of drawings Fig. 1 represents in sectional elevation a dust-
collector constructed according to our invention. Fig. 2 is a side-view thereof, Fig. 3
a horizontal section on line a a, Fig. 1, and Fig. 4 a top view with a portion in section
according to line 6 b. Figs. 5, 6 and 7 represent details to a larger scale.
The apparatus consists of a chest divided by the horizontal partition-wall 2 into the
two compartments 3 and 4, communicating respectively by the pipe A with the dust-
producing machine, and by the pipe 5 with a suction-apparatus or exhauster, and of a
number of filtering-cells 1, arranged in a circle and inserted with their open upper
ends into apertures formed in the partition-wall 2. Within the compartment 4 is
placed, concentrically to the system of filtering-cells, a rotative hollow cylinder 9,
closed at the bottom and open at the top, and which extends through the upper
horizontal wall of the compartment 4, so as to be in permanent communication with
the outer air. From the said cylinder branches of a hollow arm 10, having at its
lower side an opening adapted to register with one or more cells, the edges of the said
opening, which are flanged, being in sliding contact with the partition-wall 2. By
means of this arm and the cylinder 9 a communication is established between tho
outer air and the cell or cells with which the arm registers at the time. The upper
rim of the cylinder 9 is provided on its periphery with teeth with which engages a
pall 19, Fig. 4, pivoted to a bevel-wheel 18, that is driven by a pinion 17, shaft 15 and
pulley 16. The rotation of the said pulley will thus produce a slow intermittent
rotation of the cylinder 9 with its arm 10. Morcover, these parts are so arranged in
respect to each other that, if the inside width of the arm corresponds to that of a
single cell, the arm during its time of repose between two strokes of the pall 19, will
register exactly with one of the cells, and that at every stroke of the pull it will be
pushed on to the following cell. If the arm has a width corresponding to two cells, it
may at every impulsion be advanced by one or by two cells, as may be preferred, and
thus the like for three or more cells.
When the apparatus is in operation, and dust-laden air is drawn by the exhauster
into the compartment 3, the air alone passes from the latter through the filtering-
surfaces of all the cells not communicating with the arm 10, into the said cells and
thence into the compartment 4, and out by the tube 5, while the dust is retained by
the said surfaces. In respect to the cell or cells 11 being in communication, by means
of the arm 10 and the cylinder 9, with the outer air, the exhauster will, on the
contrary, operate to draw air from the outside of the apparatus through the cylinder

page_text: and its arm into the said cell or cells and thence through the filtering-surfaces of the
same into the compartment 3, where it mixes with the air entering at A. An inverted
current or back-draught is thus produced in the latter case with the effect of blowing
off the outer side of the filtering surfaces the dust adhering thereto. According as
the arm 10 moves forward the cells are in this manner cleaned in succession.
The means for shaking the cells at the same time they are subjected to the action of
the back-draught, consists in a hammer arranged to rotate with the cylinder 9, and
operated to strike against the cell or cells which are in communication with the
arm 10. As is shown in the drawing the hammer is formed by a bell-crank lever 11
with hammer-head 12, the said lever being pivoted to the bottom of the cylinder 9
and actuated by a cam 20 on the shaft 15 through the medium of a yoke 14, guiding
itself on the said shaft, and of a rod 13, passing centrally through the bottom of
cylinder 9 and connected by a swivelling joint to the yoke 14.
The dust collecting in the compartment 3, may be discharged from the same by any
suitable means, as for instance by a creepor 22, which conveys it towards an aperture
provided with a self-closing flap-valve 23.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, we declare that what we claim is :
1. In a dust collector, the combination, with the compartments 3 and 4, separated
from each other by the partition-wall 2, and communicating respectively with the
dust-producing machine and an exhauster, of the filtering-cells 1, arranged in a circle
and inserted with their open upper ends into apertures of the wall 2, the rotating
cylinder 9 communicating with the outer air and having the hollow arm 10, adapted
to slide with its lower open side upon the wall 2 and to register with one or more cells,
and means for rotating the cylinder 9 and arm 10, substantially as and for the purpose
described.
2. The combination, with the compartments 3 and 4, partition-wall 2, filtering-
cells 1, rotating cylinder 9 and hollow arm 10, arranged substantially as described, of
the hammer 11, 12 pivoted to the cylinder 9 and adapted to strike against the cell or
cells communicating with the atmosphere, and mechanism for actuating the same, as
and for the purpose set forth.