IMPROVEMENTS IN DUST COLLECTORS
Year: 1886

page_text: I, JOHN ESSON WILSON, of the town of Galt, in the county of Waterloo, in the
Province of Ontario, in the Dominion of Canada, Draughtsman, do hereby declare
the nature of my invention for IMPROVEMENTS IN DUST COLLECTORS, and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :—
The object of my invention is the construction of a dust collector in which the
cloth-covered sides cannot be clogged up by any accumulation of dust; and it
consists, essentially, in providing two independent frames, each carrying a series
of dust-collecting chambers formed of cloth in the ordinary way, the said frames
being placed over air-chambers into which the air blast is introduced, and which
are provided with a valve automatically operated so that the air blast is directed
alternately first into one chamber and then into the other, the frames carrying the
cloth-covered chambers being operated by mechanism so that one set of frames is
being vibrated during the period that the blast is cut off from it, the other set of
frames being stationary, so that the dust being blown into it will not be shaken
through the cloth-covered sides of the said chamber, substantially as and for the
purpose hereinafter explained.
In the drawings
Fig. 1 is a perspective end view partially in section, of my improved dust-
collector, and
Fig. 2 is a transverse section.
A, and B, are the two frames carrying the cloth covered dust chambers, a, which
are made substantially in the ordinary manner. C, is an air chamber with which
the blast pipe, D, connects, E is a valve extending the entire length of the
chamber Gand is connected to the shaft F.
Gare two shelves: extending the entire length of the chamber C, and designed
to form seats for the valve E, substantially as and for the purpose hereinafter
specified. H and I are two hopper-shaped chambers communicating with .the
chamber C from which they are alternately cut off, as hereinafter described, by the
valve E. The crank J. is connected at one end to the shaft F, its other end being
provided with a wrist-pin b, to which the bars K, L, and M, are connected. The
bar K is connected, as stated, at one end to the wrist-pin b, and at its other end to
the wrist-pin d, which is attached to the gear wheel N. The lifting-rod-0,- is
pivoted at its top end to the frame A, and is provided with a wrist-pin e which

page_text: passes through a slot formed in the end of the bar L. The other lifting-rod P,
which is pivoted at its top end to the frame B, has a similar wrist-pin ƒ which fits
into a slot made in the bar M.
Q, is a cam attached to the end of the conveyor shaft R which passes through
the hopper-shaped chamber H, and S is a similar cam attached to the conveyor-
shaft T which passes through the upper shaped chamber I. When the valve E is
set so as to close the aperture between the chambers C and H, the lifting-rod O is
held in a vertical position immediately over the cam Q, a friction roller, g, being
placed as indicated, so that when the bar L has pushed the lifting-rod O, into
the vertical position indicated it cannot push it beyond that point. Owing to the
connection of the parts described, when the valve E is set so as to close the
chamber H, the lifting-rod P is pulled by its bar M clear of the cam S, consequently
although both the conveyor-shafts R and T are revolving, the cam S has no effect
upon the lifting-rod P, and therefore the frame B remains stationary during the
period that the aperture between the chambers and I is open, at which time, as
before stated, the aperture between the chambers H and C is closed, consequently
the blast from the chamber C passes through the chamber I into the series of dust
chambers a held by the stationary frame B. Owing to the arrangement and
connection of the parts described, the valve E is caused to alternately close and
open the aperture leading from the chamber C and this is effected at regular
intervals in the following manner.
The gear wheel N meshes with a gear wheel U attached to the conveyor shaft T
which of course revolves at a much greater speed than it is desirable that the gear
wheel N should move, I do not confine myself to any particular speed for either
but I find it a good proportion to make the shaft T revolve twenty times as fast
as the wheel N; consequently, for every one revolution of the wheel N, the cam S
is caused to revolve twenty times and I make the cam S a three lift one, the
frame A would receive sixty vertical vibrations, provided the lifting-rod O was
permitted to remain in its vertical position over the cam S, but as the gear wheel N
in revolving pushes through its bar K against the crank J, the shaft F is caused
to revolve, carrying with it the valve E. By the time that the valve E is leaving
its seat formed by the shelf G, the end of the slot formed in the bar L comes in
contact with the wrist-pin e, which, as stated, is connected to the lifting rod O;
consequently the lifting-rod O, is drawn away from the cam Q; and as a consequence
the frame A ceases to vibrate. By the time the valve E reaches the other shelf G
the lifting rod P is in a vertical position over the cam S, and as a consequence the
frame B commences to vibrate.
This motion of the valve E and lifting rods are repeated as the gear wheel N
revolves, so that each frame A and B is cleaned alternately, and the frame which is
being cleaned is cut off from the blast so that the dust shaken from the cloth
covered sides will fall freely into the air chamber below it, from which it is carried
by the conveyor in the ordinary manner.
Each end of each frame A and B is provided with a lifting-rod similar to those
described, which lifting-rods are operated in the same manner by cams similar to Q
and S, the said cams being set so that each end of the frame will be agitated
alternately.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is,
1. A dust collector consisting of two independent frames, each containing a series
of cloth-covered dust chambers in combination with air chambers and auto+
matically-operating mechanism arranged to alternately agitate each frame during
the period that its chamber is cut off from the blast chamber, substantially as and
for the purpose specified.
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2. A frame A carrying a series of cloth-covered chambers a, and supported over
the air chamber H, the frame B, carrying a series of cloth-covered dust chambers a,

page_text: and supported over the air chamber I, the blast chamber C, located between the
chambers H and I and communicating therewith, in combination with the valve, E,
arranged to alternately close the aperture connecting the chambers H and I with
the blast chamber C.
3. A frame A, carrying a series of cloth-covered dust chambers a, and supported
over the air chamber H, the frame B carrying a series of cloth covered dust
chambers a, and supported over the air chamber I, the blast chamber C, located
between the chamber H and I and communicating therewith in combination with
the valve E connected to the shaft F, the crank J, connected to the said shaft and
with bars K, L, and M which connect as described respectively with the gear
wheel N, the lifting-rod O and the lifting-rod P, the whole operating as described,
so that the chambers H and I shall be alternately closed, and the lifting-rods O
and P alternately brought into connection with their respective cams Qand S,
substantially as and for the purpose specified.
5. In a double dust collector constructed substantially as described, the chambers H
and I, communicating with the chamber C, the valve E connected to the shaft F,
the lifting rods Q and P provided with wrist-pins e and f, to fit into the slots
made in the bars L and M, in combination with the spur wheel N, connected to
the crank J by the bar K, the cams Q and S, the whole being arranged and
operating substantially as and for the purpose specified.