Improvements in Sifting Apparatus.
Year: 1890

page_text: Date of Application, 4th Feb., 1890
Complete Specification Left, 1st Nov., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Sifting Apparatus.
I, CHARLES HESSEY STUBLEY, of Kings Roller Mills, Knottingley, in the, County
of York, Miller, do hereby declare the nature of this invention to be as follows
--
The object of this invention is to provide means for jerking the material which is
being sieved to and fro from side to side of the sieve as it is being passed over its
surface..
For this purpose I mount above the surface of a sieve a series of narrow slats or
blades or brushes at a distance apart from one another and set lengthwise of the
sieve.
At their ends I provide them with pivots which are free to turn in holes or
bearings in supporting plates which pass transversely across the sieve-and I make
provision for raising or lowering these supporting plates so that the bottom edges
of the blades or brushes may be kept at any desired distance from the sieve
surface.
The blades or brushes are at the top coupled by crank pins to a horizontal bar
which passes above them across the sieve and which is free to be slidden to and fro
end wise through suitable guides.
The ends of this bar are made to project beyond the sides of the sieve and as the sieve
is moved to and fro with an elliptic longitudinal or circular movement are made to
strike against fixed plates placed at either side of the sieve. In this way the bar is
jerked end wise first in one direction and then in the opposite direction thereby rocking
the narrow blades or brushes on their axes and causing their lower ends to jerk the
material which is being passed over the sieve to and fro across it.
The blades or brushes need not be perfectly straight or set perfectly parallel
with the length of the sieve but may be placed at different angles above it-they
need not also be continuous but may have gaps in them at intervals apart - the
gaps or openings in one blade or brush may be opposite each other or the sections of
one blade or brush may be opposite to the gaps in the blades or brushes that are on
either side of it so that the sections of the one blade or brush will knock the material
through the gaps in the other blades or brushes. The sections of the blades or brushes
may also be twisted or inclined across the sieve and the sections of some of the
blades may be twisted or inclined in one direction and of the other blades in the
opposite direction.
In place also of the blades or brushes being rocked by a cross bar as above described
striking against fixed plates the bar might be tied to cords which at each movement
of the sieve would in turn tighten up and give the same movement to the cross bar
or the cords might be coupled directly to the top of the blades or brushes.
Dated this 4th day of February 1890.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Sifting Apparatus.
1, CHARLES HESSEY STUBLEY, of Kings Roller Mills, Knottingley, in the County
of York, Miller, 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 :-
The object of this invention is to provide means for jerking the material which is
being sieved to and fro from side to side of the sieve as it is being passed over its

page_text: For this purpose 1 mount above the surface of a sieve a series of narrow slats or
blades or brushes at a distance-apart from one another and set lengthwise of the
sieve...
At their ends I provide them with pivots which are free to turn in holes or
bearings in supporting plates which pass transversely across the sieve and I make
provision for raising or lowering these supporting plates so that the bottom edges
. of the blades or brushes may be kept at any desired distance from the sieve
.
"
surface.
The blades or brushes are at the top coupled by crank pins to a horizontal bar
which passes above them across the sieve and which is free to be slidden to and fro
endwise through suitable guides.
The ends of this bar are made to project beyond the sides of the sieve and as the
sieve is moved to and fro with an elliptic longitudinal or circular movement are made
to strike against fixed plates placed at either side of the sieve. In this way the bar
is jerked endwise first in one direction and then in the opposite direction thereby
rocking the narrow blades or brushes on their axes and causing their lower ends to
jerk the material which is being passed over the sieve to and fro across it.
In order that my invention may be fully understood and readily carried into effect
I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of sifting apparatus arranged according to my invention.
Figure 2 is a transverse section of the same. The figures are broken as te
apparatus which they represent may be of any dimensions in length and breadth.
a is the sieve frame and a¹ the sifting surface bb are slats or blades for agitating
the material upon the sieve; or for these brushes may in some cases be substituted.
cc are supporting plates fixed to the ends of the sieve by bolts c¹ c'; these bolts pass
through elongated holes in the plates so that their positions can be adjusted as required.
There are holes in the plates cc and these receive the pivots 6' 61 of the slats or blades.
62 62 are metal pieces fixed to the slats or blades and carrying crank pins which are
received into holes d' d¹ in the transverse horizontal bar d. e e are guides fixed to the
side of the sieve through which the bar d is able to slide.
On the projecting ends of the bar d heads d2 d2 are provided and these when the
sieve is shaken in the usual way come against abutments provided for them to strike
against, and in consequence the bar d is moved suddenly first in one direction and
then in the other, with the result that the material on the sieve surface is agitated
as already explained.
The blades or brushes need not be perfectly straight or set perfectly parallel with
the length of the sieve but may be placed at different angles above it-they need not
also be continuous but may have gaps in them at intervals apart-the gaps or openings
in one blade or brush may be opposite each other or the sections of one blade or.
brush may be opposite to the gaps in the blades or brushes that are on either side of
it so that the sections of the one blade or brush will knock the material through the
gaps in the other blades or brushes. The sections of the blades or brushes may also
be twisted or inclined across the sieve and the sections of some of the blades may
be twisted or inclined in one direction and of the other blades in the opposite
direction.
In place also of the blades or brushes being rocked by the cross bar as above
described striking against fixed plates the bar might be connected with a lever or part
operated in this manner or it might be attached to cords which at each movement of
the sieve would in turn tighten up and give the same movement to the cross bar or the
cords might be coupled directly with the blades or brushes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner 'the same is to be performed, 1 declare that what I
claim is :-
:―
1. The combination with a sieve of slats, blades or brushes moveable upon pivots

page_text: and connected with a transverse bar or other connecting part which is jerked first
in one direction and then in the other by its movement being suddenly arrested as
the sieve oscillates substantially as described.
2. The combination of parts substantially as represented by the annexed drawings.
Dated this 28th day of October 1890.
C. H. STUBLEY.