Employed in Flour and other Mills.
Year: 1885

page_text: Employed in Flour and other Mills.
I WALTER BRIERLEY, of Town Hall Buildings, Halifax, in the County of York,
Patent Agent, do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN THE CONSTRUCTION OF DUST-COLLECTORS TO BE EMPLOYED IN FLOUR
"
AND OTHER MILLS communicated to me from abroad by Theodor Buchlmann, of
Vienna, Austria-Hungary, to be as follows:-
The dust collector forming the object of this present invention is deviced for
filtering the dust-laden air coming from exhaust blowers and fans, in such way
that the air passes off entirely pure and only the small particles, with which the
air was laden, as for example small parts of bran, chaff, fluff, etc. are retained and
collected..
For the above stated purpose this improved dust collector is constructed in the
following manner-It consists of an oblong base or frame constructed in iron or
wood The dust laden air enters the machine through flues coming from below and
conducting to a central channel from this latter the dust-laden air is deflected to
both sides in two separate streams each of which must pass through three filtering
surfaces. The two innermost filtering surfaces consist of coarse wire-gauze, the two
following filtering surfaces of finer wire-gauze and. the two outer filtering surfaces
of fine smooth sail cloth.
Between the filtering frames traverses a shaft upon which are keyed at both
sides, within the machine, chain wheels-Over the latter are laid the endless chains
which are connected by a small board holding a long brush-As soon as the shafts
are rotating, these brushes will be drawn continually over the filtering surfaces and
clean the same.
For beating off automatically the dust from the filtering surfaces, the following
mechanism is employed-Upon the extremities of two lower shafts are disposed

page_text: small tappets upon which bear levers pulled downwards by springs-In consequence
of the rotation of the shafts an oscillatory motion is imparted to the levers and to
the shafts upon which these levers are keyed-Upon the shafts are also keyed arms
holding hammers which therefore beat continually against the frames of the
filtering surfaces and in this way clean the latter.
The dust as removed passes downwards to channels and may either be collected
directly in the bags or dislodged by means of the creepers-The air passes off,
entirely free of dust, through the flues-Upon one end of a shaft is keyed a main
driving pulley, motion being communicated to the other lower shaft and to the
creepers by means of the gear wheels.

page_text: improvements in the Construction of Dust Conectors to De
Employed in Flour and other Mills.
I WALTER BRIERLEY, of Town Hall Buildings, Halifax, in the County of York,
Patent Agent, do hereby declare the nature of my invention for "IMPROVEMENTS
IN THE CONSTRUCTION OF DUST-COLLECTORS TO BE EMPLOYED IN FLOUR &
OTHER MILLS and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The dust collector forming the object of this invention is devised for filtering
the dust laden air from exhaust blowers and fans, so that the air shall be practically
cleared.
Such being the nature and object of the said invention, the following is a
complete description of same, reference being had to the accompanying drawings
forming part of this specification in which:-
Fig. 1. is a cross vertical section of my improved apparatus.
Fig. 2. is a side elevation.
Fig. 3 is a detail of the chain wheel.
This Invention consists of an oblong box or frame constructed of iron, or wood,
in which, on each side placed symmetrically, and parallel with the shafts are two
frames covered with wire-gauze. Between the outermost of these frames and the
outside frames 5. of the box which are covered with silk-gauze is a space or
chamber which has its outlet on each side through a flue leading into the open air
or into the Mill.
The Dust-laden Air enters the machine through flue 1. in the bottom part of the
machine, and conducting to a central channel 2, from the latter the dust-laden air
is deflected to both sides in two separate streams each of which must pass through
two filtering surfaces 3. 4.
The two innermost filtering surfaces 3. 3. consist of coarse wire & the two
following filtering surfaces 4. 4 of finer wire-gauze. (The two side-frames 5 of the
box are either covered with flannel, bunting, or silk-gauze but preferably so with
the latter.) In this wise the air loses gradually the dust particles with which the
air coming from the exhaust blowers and fans is laden and escapes perfectly
filtered through the flues.
Between the filtering frames 3. 4. traverses a shaft 6. upon which are keyed at
both sides within the machine chain-wheels 7.7. Over the latter are laid the
endless-chains 8, which are connected by a small board 9, holding a long brush 10.
As soon as the shafts 6 are rotating, these brushes 10 will be drawn continually
upwards & downwards over the filtering surfaces 3. & 4. and clean the same.
Besides these brushes I have adopted an apparatus for knocking off automatically
the dust from the two frames 4. 4. covered with finer wire-gauze so that a
dislocation of the meshes or texture cannot therefore take place.
For knocking or beating off automatically the dust from the filtering surfaces 4. 4.
the following mechanism is employed
Upon the extremities of two lower shafts 6. are placed small tappets 11.
which bear upon levers 12 pulled downwards by springs 13. In consequence of the

page_text: L
rotation of the shafts 6 an oscillatory motion is imparted to the lovers 12. and to
the shafts 14 upon which these levers 12. are keyed. Upon the shafts 14 are also
keyed arms 15. holding hammers 16 which therefore knock or beat continually
against the frames of the filtering surfaces 4. and in this way beat an clean
the latter.
The dust passes downwards to channels 17 and thence by means of conveyors or
creepers into the bags 18. 18.
Naturally fine dust particles will also find their way through the finer filtering
surfaces, the air however, when in the outer channels or chambers between the fine
wire-gauze surface and the silk covered outside frames, owing to the expansion,
does not possess the force to carry these fine dust particles along with it any
further and therefore the former sink to the bottom of the machine and are
collected in a chamber which can occasionally be cleaned by means of slides which
are applied at the sides of the machine. The air passes off entirely free of dust
through the flues 20.
F
i
Upon one end of a shaft 6. is keyed a main driving pulley 21 (see fig. 2.) motion
being communicated to the other lower shaft 6 and to the creepers or conveyors 24
by means of the Gear Wheels 22. 23. My dust collecting apparatus requires only
very little horse-power and space owing to its special construction.
.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The dust collecting or air filtering screens 3. 4. and the traversing-brushes 10
in combination with an air exhaust and as illustrated and for purpose described.
2. The screens, traversing brushes and the beaters such as 16, combined with air
exhaust, for purpose & substantially as illustrated by the annexed drawings and as
herein fully described.