Improvements in Mills for Coarse Grinding Corn.
Year: 1892

page_text: Date of Application, 10th June, 1892
Complete Specification Left. 15th Nov., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Mills for Coarse Grinding Corn.
I CARL CHRISTOPH LUDWIG LUCHT of Colberg, in the Kingdom of Prussia
and Empire of Germany, Manufacturer, do hereby declare the nature of this
invention to be as follows :-
My invention refers to a mill for coarse grinding corn, the construction of which
has for its purpose to lead the grains and parts of grains during their passage
through the mill in quite a determined manner, so that the material to be treated
runs quickly through the mill without becoming heated as is the case in other
similar constructions, but remains always in a cold condition.
The construction of the mill is shown in the accompanying drawings.
Figure 1 is a front view of the apparatus the front half of the casing being
removed.
Figure 2 shows the casing seen from inside.
Figure 3 is a section on line xx in Figure 1.
Figure 4 is a plan view of the grinding cone.
The grinding body consists of three cast iron main parts, the two casing
halves a a and the body b of conical shape and tapered from below upwards.
The inside of the casing is turned out and provided with dovetail grooves, into
which are inserted toothed steel blades g (in the machine shown in the drawings
there are four blades in each casing half). The two casing halves are connected
to each other by means of screws and may at any moment easily be taken to
pieces.
The casing is stationary and within it revolves on a vertical shaft the cone b, into
which are inserted in dovetail grooves as in the casing toothed steel blades f (there
are three blades shown in the drawings) in equal distances from each other.
The space between each two blades f, having a breadth equal nearly to 2 times
that of the blade and above which project the blades, is divided into three
chambers, i and k by three ribs c, d and e helicoidally running in determined
distances from each other from above downwards, the said ribs carrying the
material to be treated in the different chambers and leading the latter from one
chamber into the other. The material arriving upon the cone 6 falls down into the
first upper chambers h, the ribs c preventing the same from falling through the
grinding body. When the cone revolves the grains are carried with and conducted
in such a manner, that they are gradually reduced and discharged at the bottom
end of the mill.
The working of the apparatus is as follows:-
and
The grains introduced, for instance, into the chamber arrive gradually to the
blade, by which they are seized, then they are rubbed against the blades
fall into the chamber. Thence the parts of the grains are led against the
blade, by which they are pressed against the blades g and still more reduced,
they arrive then to the chamber of the third compartment, in which the same
process takes place for the third time.
The grains are entirely rubbed by the blade f' and the blades g and as soon as
they leave the blade f, they fall into a receiver arranged underneath the grinding
body and from which the ground corn is discharged into a sack or vessel.
Owing to the partition of the cone into several chambers as above described and
to the arrangement of the ribs c, d and e each grain comes during its passage
through the mill only once into the scope of each blade f which rubs it against
the blades g of the casing. The corn passes from the first chamber of the first
partition into the second chamber of the second partition and so on, it travels

page_text: therefore the shortest possible way, it remains nowhere unnecessarily lying in the
grinding body and is not at all uselessly carried round in the latter.
During the whole duration of its passage through the grinding body the material
to be treated is either continuously rubbed-as long as it is between the cone
and the blades of the casing, or it is continuously led downwards towards the
outlet of the mill.
The object of the invention is to maintain the corn by means of a rapid passage
through the machine always in a cold condition, to grind a large quantity of grains
without any interruption and a free and easy working of the mill is attained by
the above described construction.
The number of the blades of the casing may be a large one, but that of the
blades of the cone depends on the circumference of the grinding cone, and the
number of chambers and ribs in the partitions between the blades of the cone
depends upon the size of the mill and the desired fineness of the groats.
As the casing is constructed in such a manner, that at any moment it can
easily be taken to pieces, hard or generally, strange substances which accidentally
may have entered the mill, can rapidly be removed.
Dated this Tenth day of June 1892.
COMPLETE SPECIFICATION.
Improvements in Mills for Coarse Grinding Corn.
1
I CARL CHRISTOPH LUDWIG LUCHT of Colberg, in the Kingdom of Prussia
and Empire of Germany, Manufacturer, 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 :-
14
My invention refers to a mill for coarse grinding corn, the construction of which
has for its purpose to lead the grains and parts of grains during their passage
through the mill in quite a determined manner, so that the material to be treated
runs quickly through the mill without becoming heated as is the case in other similar
constructions, but remains always in a cold condition.
The construction of the mill is shown in the drawings left with the Provisional
Specification.
Figure 1 is a front view of the apparatus the front half of the casing being
removed.
Figure 2 shows the casing seen from inside.
Figure 3 is a section on line xx in Figure 1.
Figure 4 is a plan view of the grinding cone.
The grinding body consists of three cast iron main parts, the two casing halves a a
and the body of conical shape and tapered from below upwards. The inside of
the casing is turned out and provided with dovetail grooves, into which are
inserted toothed steel blades g (in the machine shown in the drawings there are
four blades in each casing half). The two casing halves are connected to each
other by means of screws and may at any moment easily be taken to pieces.
The casing is stationary, and within it revolves on a vertical shaft the cone b, into
which are inserted in dovetail grooves as in the casing toothed steel blades f
(there are three blades shown in the drawings,) .in. equal distances from each
other.
The space between each two blades f, having a breadth equal nearly to 2 times
that of the blade and above which project the blades, is divided into three
chambers, and by three ribs c, d and e helicoidally running in determined
distances from each other from above 'downwards, the said ribs carrying the
1

page_text: .
material to be treated in the different chainbers and leading the latter from one
chamber into the other. The material arriving upon the cone 6 falls down into
the first upper chambers h, the ribs o preventing. the same from falling through
the grinding body. When the cone revolves the grains are carried with and
conducted in such a manner that they are gradually reduced and discharged at
the bottom end of the mill.
The working of the apparatus is as follows:-
The grains introduced, for instance, into the chamber h' arrive gradually to
the blade f, by which they are seized, then they are rubbed against the blades g
and fall into the chamber. Thence the parts of the grains are led against the
blade by which they are pressed against the blades 9 and still more reduced,
they arrive then to the chamber of the third compartment, in which the same
process takes place for the third time.
The grains are entirely rubbed by the blade f³ and the blades g and as soon as
they leave the blade f³, they fall into a receiver arranged underneath the grinding
body and from which the ground corn is discharged into a sack or vessel.
Owing to the partition of the cone into several chambers as above described
and to the arrangement of the ribs c, d and each grain comes during its passage
through the mill only once into the scope of each blade which rubs it against the
blades g of the casing. The corn passes from the first chamber of the first partition
into the second chamber of the second partition and so on, it travels therefore the
shortest possible way, it remains nowhere unnecessarily lying in the grinding body
and is not at all uselessly carried round in the latter.
During the whole duration of its passage through the grinding body the material
to be treated is either continuously rubbed-as long as it is between the cone and
the blades of the casing,-or it is continuously led downwards towards the outlet of
the mill.
The object of the invention is to maintain the corn by means of a rapid passage
through the machine always in a cold condition, to grind a large quantity of grains
without any interruption and a free and easy working of the mill is attained by the
above described construction.
The number of the blades of the casing may be a large one, but that of the
blades of the cone depends on the circumference of the grinding cone, and the number
of chambers and ribs in the partitions between the blades of the cone depends upon
the size of the mill and the desired fineness of the groats.
As the casing is constructed in such a manner, that at any moment it can easily
be taken to pieces, hard or generally, strange substances which accidentally may
have entered the mill, can rapidly be removed.
Having now fully 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 :-
A mill for coarse grinding corn consisting of a cast iron conical casing a composed
of two parts and provided with toothed steel blades inserted into dovetail grooves,
in which casing revolves a cast iron cone b carrying also toothed steel blades f
which are inserted in such a manner that between each two blades there is always
produced the same free deepened space, which is divided by ribs c, d, e etc. conically
running from above downwards, into several chambers, so that in consequence of
the revolution of the cone the material to be treated passes from the first chamber
of the first partition into the second chamber of the second partition and so on
meeting each blade only once, substantially as set forth and shown in the drawings.
Dated this Fifteenth day of November 1892.