Year: 1895

page_text: Date of Application, 24th July, 1895-Accepted, 11th Apr., 1896

page_text: In order that the grain may move forwards in the inclined channel g' and on to
the sieves, it must be shaken backwards and forwards.
With this object the upper frame is suspended by flexible rods 9, 9, and the
to-and-fro movement is transmitted from the cranked shaft g³, supported in
bearings on the front columns, by means of the flexible connecting rods 9º.
The cranked shaft is separately shown in Fig. 4.
On the sieves 92, 93, the grains are separated from the chaff and dust.
For this purpose I arrange upon two longitudinal beams, situated behind the
sieves, the usual air fan as generally employed in the ordinary sifting machine,
which fan consists of vanes g³, fixed by arms g, upon the shaft g', and by the
rotation of which a blast or strong current of air is produced, this current being
conducted through the channel g10 between the sieves.
This said air current separates, from the grain falling through the upper sieve g³,
all light substances such as chaff, straw and the like.
In order that the air current may not carry away good material with it, I place
in its path, in front of the sieves, a binged board or flap 9", adapted to slide in the
openings in the side walls, in such a manner that the air current will be
compelled to pass and carry with it the lighter parts of dust over the flap 912, and
allow the beavier grains to drop.
Any grains which may have been blown over fall upon another board g¹³,
situated under the lower board 912, and mounted in a similar manner, and are
conducted back by the same.
From the sieves and the board 912 the grain drops upon a sloping sieve h³
'enclosed in a suitable casing or channel h¹.
For conducting the grain further, this channel 2 is connected firmly to the
upper channel g¹, and is shaken in conjunction with the latter.
In the channel h¹ the grains are sorted firstly into perfect grains, and secondly
into defective small broken grains, in short, waste.
As the grains which have fallen through the above mentioned board or flap g¹²
are likewise too light, and therefore defective, they are already conducted by the
board g below the sieve h².
The perfect grains remaining above the sieve 2 glide along the latter and are
conducted through the channel h³ leading sideways to the openings *, h³, Fig. 1,
and thence into sacks.
The waste which has passed below the sieve 2 falls into a channel i¹, which is
likewise suspended from the upper frame c by means of flexible rods 2, 2, and
moved by the cranked shaft g³.
In the channel is a sieve through which the waste falls, and is again freed
from the chaff and straw which it may still contain.
With this object I conduct an air current produced by the revolution blades or
vanes fixed by means of the arms upon the shaft A, through the channel k
below the sieve, whereby the chaff is removed through the opening ³.
Finally the waste which falls through the sieve, reaches the channel is, and is
thence led away into sacks.
The driving of the shafts takes place from one to the other by means of belt
pulleys, in the following order:
The power is transmitted from the motor through the intervention of the
belts to the belt pulley 12 of a shaft l', supported upon a pair of columns.
This belt pulley is provided with steps, and by means of the crossed belt m²,
actuates the belt pulley m² of the shaft g'.
At the other end of the shaft is another stepped belt pulley 1, which operates
by another intervening belt n', the belt pulley n of the cranked shaft go, whilst by
another pulley it sets in motion, through belts n³, the belt pulley n', at one end of
the shaft f¹.
At the other end of the shaft f¹, is keyed a belt
the belt o² operates the pulley o³ of the shaft e¹.
pulley o', which by means of

page_text: The lower air fan is driven from the upper air fan by a belt p³ passing round
the pulley p¹ of the shafts g', and round the pulley p² of the shaft .
Having now particularly described and ascertained the nature of my said inven--
tion, and in what manner the same is to be performed, declare that what I
claim is :-
An improved sifting apparatus for grain combined with an awn breaker,
characterized by the elevator el to eº, awn breaker f¹ to f10, an upper sieve g¹ to go,
an upper fan g' to g¹³, a sorting sieve h¹ to h³, a lower sieve to, and finally by a
lower fan k¹ to k, which parts are put together as described, mounted upon a
carriage frame a b c d, for cleaning and preparing the grain for commercial
purposes, and designed to replace hand sifters by a mechanical sifting apparatus.
Dated this 24th day of July 1895
S. S. BROMHEAD,
97 Newgate Street, London, Patent Agent.