Year: 1888

page_text: 1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature of
this invention to be as follows:-
Thi. invention relates to that class of dust collectors in which the solid particles are
carried with a current of air, and deposited by centrifugal action on the surface of .a
conical chamber, thence falling down the same to be discharged at the bottom through
ani opening, while the air, freed from the dust, escapes upwards.
The object of the said invention is to prevent the in current of air through the
dust discharging opening which has in other machines interfered with the escape of
the light particles.
The said invention comprises a body of. the form of a truncated cone as in an
ordinary centrifugal dust collector or it may be cylindrical at the top, and hopper
formed below.
The dust laden air enters through a tangential pipe attached at the top. Sweeping
around the chamber it deposits its dust on the surface, and escapes through the tubular
outlet in the top and at the centre of the body.
A vertical shaft passes down through the axis of the cone and is supported by
bearings at the top and bottom, the said shaft carrying a fan placed in the outlet so
as to be rotated by the escaping air. The vertical shaft rests on a step which may be
adjusted by a set screw.
A worm on the vertical shaft meshes into a worm-wheel on a horizontal shaft, to
which four wings of the bucket wheels are attached on each, and, the arrangement
being such that the rotation of the vertical shaft gives a slow rotation to the horizontal
shaft and the bucket wheels. These wheels are enclosed by the cylindrical chamber
which is fastened to the bottom of the conc. A box encloses the worm wheel and is
provided with holes for the passage of the shafts. At the bottom of the cylindrical
casing, openings are formed for the escape of the dust.

page_text: As the edges of the buckets rotate in close proximity to the interior surface of the
cylindrical chamber an indraft of air is prevented.
The operation is as follows; the dust laden air being forced into the chamber
tangentially is caused to sweep around with a vertical movement depositing its dust
on the sides and escaping centrally and upwards. In escaping, it rotates the fan and
shaft, and causes the slow rotation of the bucket wheel, into which the dust, sliding
down the inclined surface, is delivered, and from which it is discharged through the
openings at the bottom of the cylindrical casing.
This form of wheel is not new, and other devices capable of being substituted
are well known as proper means for conveying pulverulent particles while pre-
venting the passage of air currents through the same opening. My invention
however relates to the combination with a centrifugal dust collector of a trapped
discharge without limitation to any particular trapping device.
Dated this 19th day of March 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: The operation is as follows the dust laden air being forced into the chamber
tangentially is caused to sweep around with a vertical movement depositing its dust
on the sides and escaping centrally and upwards. In escaping it rotates the fan
and shaft, and causes the slow rotation of the bucket wheel H into which the dust
sliding down the inclined surface is delivered and from which it is discharged through
the openings G¹ at the bottom of the cylindrical casing.
This form of wheel is not new and other devices capable of being substituted
are well known as proper means for conveying pulverulent particles while pre-
venting the passage of air currents through the same opening. My invention
however relates to the combination with a centrifugal dust collector of a trapped
discharge without limitation to any particular trapping device.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign Correspondent I declare that what I claim is:
First. In combination with the tapering chamber A of a centrifugal dust
collector, a trapped discharge taking the, dust from the bottom of the chamber A
and carrying it away by a positive mechanism which prevents an indraught of air,
substantially as set forth.
Second. In combination with a dust collecting chamber A. A rotating shaft D,
a horizontal shaft I driven by the shaft D the bucket wheel and cylindrical casing
attached to the mouth of the tapering end of the chamber A and provided with an
opening for the delivery of the dust substantially as set forth.
Dated this th
1000