IMPROVEMENTS IN WINNOWING MACHINES to be as follows
Year: 1885

page_text: [Communicated from abroad by Messieurs Wirth and Company, of Frankfort-
on-the-Muin, Agents for Wilhelm Seck, of Bockenheim, near Frankfort-on-
the-Main, both in the Empire of Germany.]
I, GEORGE FREDERICK REDFERN, of the General Patent Office, 4, South Street,
Finsbury, in the county of Middlesex, Patent Agent do hereby declare the nature
of the said invention for "IMPROVEMENTS IN WINNOWING MACHINES
to be as
follows:-
"
There are a variety of winnowing machines constructed to carry an air blast
under a sieve which air blast by making its way through the sieve goes right
through the superincumbent layer of grits and thus keeps the light particles of
intermingled husks from dropping through the sieve, but all winnowing machines
constructed on this plan are open to the objection that the air blast is not equally
distributed over the entire area of the sieve it being more powerful on one side
than on the other so that at the parts where it is more powerful the grits are
blown upwards and mixed with the refuse, while where the blast is weaker
the bran particles are allowed to get on the sieve and drop through it with
the grits.
Now by this invention these defects are obviated and in carrying out the
invention I cause the air blast produced by the fan to be directed into two channels
arranged longitudinally in the machine and thence into pipes placed at right angles
to the said channels and underneath the sieve; these pipes are provided at their
upper surfaces with a row of small apertures placed at a sufficient distance apart
to enable the separate lines of current passing from these apertures to mingle
directly beneath the sieve whereby the entire extent of the under surface of the
sieve is subjected to a blast of uniform strength at every point. This arrangement
allows of the force of the blast being regulated in both channels to the required
degree to suit the different descriptions of grits and the like.

page_text: COMPLETE SPECIFICATION.
•Improvements in Winnowing Machines.
I GEORGE FREDERICK REDFERN, of the General Patent Office, 4 South Street,
. Finsbury in the county of Middlesex Patent Agent do hereby declare the nature
of this invention (a communication from abroad by Messieurs Wirth & Co of
Frankfort-on-the-Main, in the Empire of Germany, acting as Agents for Wilhelm
Seck of Bockenheim near Frankfort-on-the-Main aforesaid and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
There are a variety of winnowing machines constructed to carry an air blast
under a sieve which air blast by making its way through the sieve goes right
through the superincumbent layer of grits and thus keeps the light particles of
intermingled husks from dropping through the sieve, but all winnowing machines
constructed on this plan are open to the objection that the air blast is not equally
distributed over the entire area of the sieve it being more powerful on one side
than on the other so that at the parts where it is more powerful the grits are blown
upwards and mixed with the refuse, while where the blast is weaker the bran
particles are allowed to get on the sieve and drop through it with the grits.
Now by this invention these defects are obviated and in carrying out the
invention I cause the air blast produced by the fan to be directed into two
channels arranged longitudinally in the machine and thence into pipes placed at
right angles to the said channels and underneath the sieve; these pipes are pro-
vided at their upper surfaces with a row of small apertures placed at a sufficient
distance apart to enable the separate lines of current passing from these apertures
to mingle directly beneath the sieve whereby the entire extent of the under
surface of the sieve is subjected to a blast of uniform strength at every point.
In order to enable the invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figures 1 and 2
represent a longitudinal and a cross section respectively of a winnowing machine
constructed according to this invention.
a, represents the fan or blower for producing the air blast, which is directed
through the two longitudinal channels b and c, and thence into the pipes d, situated
under the sieve. The pipes d, are placed at right angles to the channels b and c,
and are round in cross section; they are provided at their upper surfaces with a
row of small apertures through which the air blast passes to the under surface
of the sieve.
This arrangement allows of the force of the blast being regulated in both
channels to the required degree to suit the different descriptions of grits and

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
A winnowing machine in which the blast produced by a fan or blower a passes
through two longitudinal channels b, and c, and thence into pipes d, placed at right
angles thereto, the said pipes being provided at their upper surfaces with a row
of small apertures placed at a sufficient distance apart to enable the separate lines
of current, passing out of these apertures, to mingle directly beneath the sieve
whereby the entire extent of the undersurface of the sieve is subjected to a
blast of uniform force at every point which force can be regulated to suit the
requirements of the different descriptions of grits and the like substantially as
herein before described and represented in the accompanying drawing.
Dated the oth L