Improvements in Flour Bolting Mills.
Year: 1892

page_text: Date of Application, 14th July, 1892-Accepted, 27th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in Flour Bolting Mills.
1, ERNST AUGUST WEINHOLD of 124 Rue du Canal, Louvain, in the Kingdom
of Belgium, 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 invention consists in adapting one or more fixed or rotating brushes to any
desired parts inside the sieve cylinder or sieve drum for the purpose of automatically
and continuously, brushing the silk so that the entire surface of the sieve is enabled
to do the work in a most efficient and even manner.
Flour bolting mills by means of rotary drums of silk gauze are used to separate
the meal into flour and offal of various degress of fineness. It is obvious that some
of the particles of the meal will adhere to the gauze and block up the meshes
whereby a quick sifting of the flour is rendered impossible and the invention herein-
after described is especially intended to overcome this difficulty.
In the accompanying drawing the Figures 1, 14, 2, 24, 3, 34, respectively represent
vertical and horizontal sections of three methods of adapting brushes to the bolting
sieve.
All the three arrangements are constructed on the same principle. On a shaft W
is keyed and supported, by means of cross stays or arms in the usual manner, the
sifting drum S.
At equal distances from the ends of the drum are two or more double levers H,
the bosses N of which are loose on the shaft W. In order to keep the levers at
equal distance they are connected together by a longitudinal stay or bar X.
Parallel with the shaft W and attached to the corresponding lever arms is a
brush B arranged in such a manner, that the tips just touch the sifting gauze of the
drum.
In order to retain the brushes in a nearly constant position, the shorter arms of
the levers H are provided with adjustable counterweights G which force the brushes
to remain in the upper part of the drum.
This arrangement has moreover a special advantage in so far as any obstacle on
the inner surface of the gauze is not forcibly removed but only gradually as the
brushes follow a little with the obstacle.
The arrangement of brushes inside the drum has a special advantage compared
with the ordinary outside acting brushes.
The inner brush can much more easily remove the adhering particles of flour
from the meshes than can the ordinary outside brush, as the particles referred to
do not as a rule pass to the outer surface of the sieve but rather hang on the inner
side thereof. It follows therefore naturally that by means of the inside brush an
almost absolutely clean surface of sifting gauze is ensured.
The rotrary brush in Figures 2 and 24 is still more efficient. In this case the
cylinder brush B is capable of turning in bearings at the ends of the longer arms of
the levers H. A pinion z at one end of the brush spindle gears with a toothed
wheel Z which is keyed to the shaft of the drum. By rotating the drum sieve and
with it the large toothed wheel, the brush will also be rotated but in an opposite
direction to the gauze sieve. By this latter arrangement great cleanliness of the
gauze surface is obtained. An additional advantage is obtained in the fact that as
the rotation of the brush is proportional to the rotation of the drum, the working
capacity of the apparatus rises directly in proportion with the higher speed imparted
to it.
The arrangement in Figures 3 and 3* is similar to that last described but instead
of adopting toothed wheels to rotate the brush a belt is employed which can either

page_text: be straight or crossed so as to turn the brushes either with or against the movement
of the drum sieve. The counterweights are in all three arrangements disposed in
the same manner but in the last two cases, only two levers can be used which are
arranged close to the ends of the drum.
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. In flour bolting mills the combination with the gauze sifting drums of internal
brushes, which either rotate round their own. axis or which are rigidly connected to
double levers which swing on the drum shaft Wand are provided with counter-
weights substantially as herein shown and described and for the purpose stated.
2. In conjunction with the internal sieve brushing apparatus claimed in Claim 1.
the arrangement of toothed wheels or belts for rotating the cylindrical brushes B,
substantially as herein shown and described.
Dated Til 14th 1900
ERNST AUGUST WEINHOLD,
By Harris & Mills,
23, Southampton Buildings, London, Agents.
ERNST AUGUST WEINHOLD,
By Harris & Mills,
23, Southampton Buildings, London, Agents.