Improvements in or relating to the Jogging or Shaking of Sieves and other Apparatus.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to the Jogging or Shaking of Sieves
and other Apparatus.
1, Thomas ClaRKSON of 59 Mark Lane, in the Counity of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to imparting the jogging or shaking movement to sieves
or other apparatus. Many devices are at pres nt known for this purpose such as
eccentrics, cams, tappets or the like, most of which can be found in the well known
milling machinery of the present day. Usually there exist more or less serious
defects in the present appliances too much movement frequently being imparted to
the sieve so that the particles to be sieved instead of being merely impelled through
the meshes of the sieve are moved about over the meshes and remain for a consider-
able time above them instead of passing through; I have found that by imparting
the right form of vibration or movement to the sieving apparatus the length of
time occupied in the process of sieving may be greatly decreasel.
The means that I prefer to adopt ecusist substantially in the employment of
rollers with flats on their peripheries, usually polygonal in form, by which a series.
of higher and lower surfaces are presented, thus imparting to the sieve a series of
b'ows of considerable power but only small amount of movement. These rollers as
I will call then may be carried upon the sieve itself or upon an independent frame
or equivalent but are so arranged that as the sieve or the frame travels the rollers
rotate, imparting to the sieve very rapid blows and causing intense rapid vibration
of the sieve. It will be understood that the rollers may be long or short, large or
small and may have many or few sides or laces though usually I prefer to have
Dot less than five. Where it is desirable or not objectionable for the sieve to
travel backwards and forwards the jogging may be obtained by reciprocating the
sieve, the weight of which would lie upon the rollers, and causing the rollers to
rotate, but where it is not desirable to move the sieve the rollers may be carried in
a separate frame or apparatus which may be moved underneath the sieve so that
as the rollers rotate the sieve is constantly lifted up and down the rollers resting
upon a suitable surface which may be roughened, corrugated, coated with rubber,
leather or other material or otherwise dealt with so as to prevent the slipping of
the rollers without rotating. Or the sieve may be stationary and the Hoor or
surfaces upon which the rollers rest may be recip ocated so as to impart the rotary
movement to the rollers the frame travelling as the rollers rotate. If desired in
order to make the vibrations synchronous the two or more rollers may be connected
together by any suitable gearing or form of connection say for example pitch wheele
and chaia
From the foregoing it will be understood that practically no pressure comes upon
the bearings of the rollers the bearings simply serving to keep the rollers in their
proper places, the rollers themselves taking all the weight. The intensity of the
vibration may be varied by the weight or pressure upon the rollers, the greater the
weight or pressure the more intense the jogging effect.
1 find that the results obtained with this device are particularly good, the

page_text: movement imparted to the materials being in the direction required, viz.: approxi-
mately normal or perpendicular to the plane of the sieve, and the whole material
being well shaken about and "lively."
As previously stated the rollers may be carried by the sieve but where it is
desired that the sieve shall not reciprocate a bed may be introduced underneath the
rollers and may be carried by guides or by other rollers underneath which may be
either circular or have flats like those already described; in the latter case there
would be two sets of the jogging rollers which might be arranged to work
synchronously or not according to requirement. In some cases sieves for milling
purposes are arranged to have a circular motion imparted to them and these are
sometimes supported upon conical rollers at the corners or periphery; my invention
may be applied to these sieves by fluting or flattening the surfaces of these rollers,
the effect of a fluted roller whether of the conical form now described or of those
previously described being the same as if portions of it were flattened'.
Dated thie 16th day of May 1801
COMPLETE SPECIFICATION.
Improvements in or relating to the Jogging or Shaking of Sieves
and other Apparatus.
I, THOMAS CLARKSON, of 59 Mark Lane, in the County of London, Engineer,
do hereby declare the nature of this invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to imparting the jogging or shaking movement to sieves or
other apparatus. Many devices are at present known for this purpose such as
eccentrics, cams, tappets, or the like, most of which can be found in the well known
milling machinery of the present day. Usually there exist more or less serious
defects in the present appliances, too much movement frequently being imparted to
the sieve so that the particles to be sieved instead of being merely impelled through
the meshes of the sieve are skimmed about over the meshes and remain for a
considerable time above them instead of passing through; 1 have found that by
imparting the right form of vibration or movement to the sieving apparatus the
length of time occupied in the process of sieving may be greatly decreased, and that
a fine mesh sieve may be kept clear without the use of brushes.
The means that I prefer to adopt consist substantially in the employment of
rollers with flats on their surfaces usually polygonal in form, by which a series of
higher and lower surfaces are presented, thus imparting to the sieve a series
of blows of considerable power, but only small amount of movement. These rollers
as will call them, may be carried upon the sieve itself or upon an independent
frame or equivalent but are so arranged that as the sieve or the frame travels the
rollers rotate, imparting to the sieve very rapid blows and causing intense rapid
vibration of the sieve. It will be understood that the rollers may be long or short,
large or small, and may have many or few sides or faces though usually I prefer to
have not less than five. Where it is desirable or not objectionable for the sieve to
travel backwards and forwards the jogging may be obtained by reciprocating the
sieve, the weight of which would lie upon the rollers, and cause the rollers to
rotate, the rollers resting upon a suitable surface which may be roughened, corru-
gated, coated with rubber, leather or other material or otherwise dealt with so as
to prevent the slipping of the rollers without rotating. Or the sieve may be
stationary and the floor or surfaces upon which the rollers rest may be reciprocated

page_text: the rollers rotate. If desired in order to make the vibrations synchronous the two
or more rollers may be connected together by any suitable gearing or form of
connection say for example pitch wheels and chain.
When the apparatus is constructed in the manner before described it will be
understood that practically no pressure comes upon the bearings of the rollers, the
earings simply serving to keep the rollers in their proper places the rollers
themselves taking all the weight, and that there is no rubbing contact but merely
rolling contact with the polygonal faces of the rollers, the rubbing contact being
limited to the circular and comparatively small bearings of the rollers.
intensity of the vibration may be varied by the weight or pressure upon the
rollers, the greater the weight or pressure the more intense the jogging effect.
It may also be adjusted by varying the number of sides to the polygon and by the
regulation of speed.
The
I find that the results obtained with this device are particularly good, the
movement imparted to the materials being in the direction required, viz.-approxi-
mately normal or perpendicular to the plane of the sieve, and the whole material
being well shaken about and "lively.”
As previously stated the rollers may be carried by the sieve but where it is
desired that the sieve shall not reciprocate a bed may be introduced underneath
the rollers and may be carried by guides or. by other rollers underneath which may
be either circular or have flats like those already described; in the latter case
there would be two sets of the jogging rollers which might be arranged to work
synchronously, or not, according to requirement. In some cases flat sieves for
milling purposes are arranged to have a rotary motion imparted to them and these
are sometimes supported upon double conical rollers at the corners; my invention
may be applied to these sieves by fluting or flattening the surfaces of these rollers,
thus forming a double pyramidal roller. The effect of a fluted roller whether of
the conical form now described or of those previously described being the same as
if portions of it were flattened.
In the accompanying drawings
Figure 1 is an end elevation showing my invention applied to an inclined sieve
such as may be used in flour and other mills.
Figure 2 is an elevation of the left-hand side of Fig. 1.
Figure 3 is a diagram showing a modification.
Figure 4 is a view partly in side elevation and partly in longitudinal section
and Figure 5 a transverse section of Figure 4 showing my invention applied to a
device which may be used in private houses and other places for cinder sifting or
analogous purposes.
Like letters indicate like parts throughout the drawings.
In Figures 1 and 2 the sieve A inclines from its receiving to its discharging end
at which latter part it is pivotted conveniently by means of two shoes A' on a
shaft B. This shaft B, shaft C, hopper D and feed roller D' are supported in any
convenient manner by the framing of the machine which, excepting as regards
the special devices employed for jogging the sieve may be of any desired
construction.
At the underside of the sieve A, I provide a batten A2 to which are secured
bearings E carrying on a shaft E on which is rigidly mounted a polygonal
roller E. This roller under the weight of the sieve A constantly bears upon the
conveniently-roughened periphery of the roller or wheel F mounted upon the
shaft C so that as the roller E is rotated as it may be through the pulley E3 and
belt E it rotates the roller F and by not being circular causes the sieve to be
rapidly reciprocated in a vertical or approximately vertical direction. Either or
both of the rollers E F may be covered with indiarubber or equivalent material so
as much as possible to prevent slip between them.
In Figure 3, A represents the sieve, E two polygonal rollers on which the sieve
is directly supported and G a surface or bed upon which the rollers are supported.

page_text: In this arrangement the rollers E may be connected to the sieve A so that they
may rotate freely and allow the sieve to reciprocate in a vertical direction
independently of them, and the sieve is prevented from moving in a horizontal
direction by any suitable devices. The two rollers E in this arrangement are
connected together by two links 1 one at each end or by a frame.
The bed' G may he reciprocated in the directions indicated by the arrows, by any
convenient means and when it is so moved the friction between it and the rollers É
causes the latter to rotate and thus by reason of the shape of the rollers Ea
vertical jogging motion is imparted to the sieve. It is preferred in this arrange-
ment to provide the rollers E with an uneven number of sides, so as to reduce the
power necessary to rotate them and the likelihood of slip between the bed and said
rollers, also to increase the rapidity of the vibrations.
Instead of using a reciprocating bed as last described I may provide a continuously
moving one which may be in the form of an endless web or apron; or as in the
device Figures 1 and 2.
The device represented in Figures 4 and 5 comprises a body or box H supported
on four preferably rubber-covered polygonal rollers E which are adapted to be
rotated by frictional contact with the ground, floor or other surface. The upper
part of the box H is provided with ledges Hadapted to support a sieve A which
may be readily removed from or placed in the box H and is provided with a hinged
or other lid or cover A³.
The last described device is specially applicable for sifting cinders for domestic
purposes and may be used as follows;-
The sieve A is first placed in the position shown in the drawings, and the
cover A³ raised, the unsifted cinders are then placed in the sieve A and the cover
closed down. The complete device is then moved backward and forward so that
the rollers E are caused to rotate with the result that a series of sharp jerky
movements in a vertical direction are imparted to the box H and sieve A which
causes the dust or smaller particles to pass through the sieve and drop into the box
the cinders or larger particles remaining on top of the sieve. The sieve A. may
then be detached from the box H and the cinders removed therefrom for use as
fuel, and the dust may also be removed from the box A.
The before described devices may be modified without departing from the spirit
of the invention the rollers E being applicable to sieves for the purposes
described in many different ways and moreover each of these rollers instead
of having a number of flat or equivalent faces may have only one; or two
or other convenient number may be used, and these flats or faces may either be flat
as in Figures 1, 2 and 3 or hollowed out as in Figures 4 and 5.
I have used the word "polygonal" in this Specification and claims, but I wish it
to be understood that in that term I include other forms which would produce the
same effect. Thus a "polygonal" roller might be fluted or the material between
each angle or raised surface might be omitted or removed, or the roller or equi
valent might be a skeleton presenting only the angles or raised parts necessary to
produce the desired result. Any such arrangement would be included in the term
polygonal.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;-
1. Imparting jogging motion to a sieve in the direction of motion of the
materials passing through it by means of a "polygonal" roller.
2. The combination with a sieve of a roller having a "polygonal" perimeter
substantially as and for the purpose described.
3. The combination with a sieve and a jogging roller having a "polygonal"
perimeter of a wheel such as F rotating in contact with the said roller substantially
as and for the purpose described and illustrated in Figures 1 and 2 of the
accompanying drawings.

page_text: 4. The combination and arrangement of parts constituting the complete sifting
device substantially as. described and illustrated in Figures 4 and 5 of the
accompanying drawings.
T. CLARKSON.
Boult & Wade,
Agents for the Applicant.
T. CLARKSON.
Boult & Wade,
Agents for the Applicant.