Improvements in Apparatus for Cleaning Sieves.
Year: 1896

page_text: Date of Application, 17th Feb., 1896
Complete Specification Left, 16th Nov., 1896-Accepted, 16th Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cleaning Sieves.
I, PEIRSON TURNER, of 82 Mark Lane, in the City of London, Milling
Engineer, do hereby declare the nature of this invention to be as follows:-
My improvements relate to the cleaning of flat horizontal oblong sieves which
are reciprocated to and fro with a circular movement usually of small radius as
compared with the width of the sieve.
To effect this I place below the silk or other sifting surface a straight narrow
brush with its bristles standing upwards and at their ends coming against the
silk.
The back of the brush is connected near its two ends to two horizontal rings
which are, supported below the two ends of the sieve and which usually are of
somewhat less diameter than the width of the sieve. Each ring is made to rest on
three or more small blocks which stand up from the sieve tray or bottom which is
below the sifting surface.
A projection rising up from each block keeps the rings in place but yet allows
them to turn freely.
When the sieve is shaken with its circular movement the rings acquire a slow
turning movement and in this way carry the brush to and fro across the underside
of the silk. To ensure that the brush shall always remain parallel with the sides
of the sieve the two rings may in addition be coupled together on their undersides
by a connecting rod the pins connecting the rod to the rings being on radial lines
which are at right angles to the radial lines on which are situated the pins which
connect the rings with the back of the brush..
Dated this 15th day of February 1906
Improvements in Apparatus for Cleaning Sieves.
1, PEIRSON TURNER, of 82 Mark Lane, in the City of London, Milling
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 :-
My improvements relate to the cleaning of flat horizontal oblong sieves which
are reciprocated to and fro with a circular movement usually of small radius as
compared with the width of the sieve.
To effect this I place below the silk or other sifting surface a straight narrow
brush with its bristles standing upwards and at their ends coming against the
silk,
The back of the brush is connected near its two ends to two horizontal rings

page_text: which are supported below the two ends of the sieve and which usually are of
somewhat less diameter than the width of the sieve. Each ring is made to rest on
three or more small blocks which stand up from the sieve tray or bottom which is
below the sifting surface.
A projection rising up from each block keeps the rings in place but yet allows
them to turn freely.
When the sieve is shaken with its circular movement the rings acquire a slow
turning movement and in this way carry the brush to and fro across the underside
of the silk. To ensure that the brush shall always remain parallel with the sides
of the sieve the two rings may in addition be coupled together on their undersides
by a connecting rod the pins connecting the rod to the rings being on radial lines
which are at right angles to the radial lines on which are situated the pins which
connect the rings with the back of the brush.
Figure 1 of the annexed drawings is a central longitudinal section of the
apparatus and Figure 2 a plan with the silk and bristles of the brushes removed.
In these figures a is the silk or other sifting surface and b the brush. In the
back of the brush are two slots c which receive pins d fixed on the rings e e.
These rings are supported on the blocks ff and are kept in position by the pins gg
which project up from the blocks and which are surrounded by india rubber
buffer rings g' g. h is a connecting rod connecting the two rings by the radial
bars e ei are auxiliary brushes connected with the main brush 6 which may
be employed when the sifting surface is considerably broader than the diameter of
the rings.
Preferably the brush is slotted at the ends to receive the pins d as is described
and shown by the drawing, in which case an additional connecting rod k extending
from pin to pin is provided.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The means substantially as described for cleaning sieves by brushes on the
underside so mounted as herein set forth that the motion of the sieve imparts to the
brushes a slow movement to and fro across the sieve.
2. The combination of parts consisting of the sieve surface a, brush b on the
underside thereof, the rings e supporting the brush and the connecting rod or rods
connecting the two rings and ensuring that they revolve at the same speed.
3. Apparatus for cleaning sieves substantially as described.
Dated this 10th day of November 1896.
PEIRSON TURNER.