Improvements in or relating to Threshing Machines.
Year: 1894

page_text: Date of Application, 12th Apr., 1894
Complete Specification Left, 3rd Nov., 1894-Accepted, 8th Dec., 1894
Improvements in or relating to Threshing Machines.
A communication by HEINRICH LANZ, of Mannheim, in the Empire of Germany.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil Engineer do hereby declare the nature of this invention
to be as follows:-
The improvements in threshing machines, which form the object of the present
application, relate to an easy and complete purifying of the material threshed, both
by facilitating the separation of the grain from straw, chaff, or the like, as well as
by the subsequent re-purifying of the collected grain from small and light
admixtures. For this object the invention consists, firstly, in the peculiar arrange-
ment of the sieve and strawshaker, or of the trays leading to them from the
threshing drum, and secondly, in the use of the threshing drum for producing a
current of air which removes the remaining impurities from the collected grain.
Hitherto the grain, which had passed through the openings of the threshing casing
or concave, and was only mixed with chaff, was always again treated along with
the separated straw by shaking and sieving in order to separate the grain from the
straw and chaff.
This invention consists, firstly, in treating the grain (which has passed through
the openings in the threshing casing and is only mixed with chaff, and is therefore
easier to separate) separately from the grain which is still retained in the threshed
straw. The former amounts to about 75% of the whole corn threshed out, so that
a considerable relief to the shaking apparatus is obtained.
The separation of the two kinds of material delivered from the drum is produced
by openings being arranged in the threshing casing which encloses the drum, which
openings allow the corn and chaff to drop through and to be directly conveyed by
a shute to the chaff-sieve, whilst the drum casing at the end of the actual threshing
casing is closed so that the straw emerging from between the threshing casing and
the drum cannot reach this shute. This straw is treated in the usual manner and
the grain separated therefrom is then added to that obtained at first. The mass of
corn obtained in this manner is subjected to a fresh purifying, a draught of air
caused by the rotation of the threshing drum being utilised for this purification.
The rapid rotation of the drum causes, in consequence of its centrifugal force,
an outflow of air from its entire circumference, which air is discharged at the ends
of the drum. In this manner the wheat before it leaves the machine is again freed
from chaff, seeds, shells, dust and the like, and these latter substances are directly
conveyed to the other waste products or tailings.
These improvements are shown on the accompanying drawings.
Figures 1 and 2 are sections of details of the machine which is arranged in the
improved manner for the subsequent purifying.
Figure 3 is a section of the machine which shows the arrangements of the
sieves.
Behind the threshing casing A, a partition or guide-board E is placed. This
latter however does not, as formerly, open above the collecting tray B, but on to a
new special collecting tray C, which is beneath B and forms with this latter a
shute or channel D through which the grain falling from the openings or meshes
of the threshing casing A can directly reach the chaff sieve K.

page_text: The collecting tray B is shortened in order to form an inlet opening in the
channel D, and is connected by means of a new partition or guide board F with
the casing of the threshing machine. This part of the material threshed therefore
no longer passes as was formerly the case over the sieve S. On this sieve in fact
there comes only the corn which falls through the straw shaker H, after this corn
has passed over the bottom board G and has been conveyed by means of the guide
board F on to the collecting tray B. The corn falling through the sieve S unites
again with the corn from the casing A.
The short straw is delivered into the channel T which has a fall either to the
right or to the left, or is removed from the machine in other suitable manner.
In order to complete the subsequent purifying, the threshing machine is provided
with a purifying or separating box N, which neither contains sieves, nor is
subjected to a shaking movement.
A channel C¹ connects the purifying (or separating) box N with the interior of
the drum by means of an opening O in the right or left of the threshing machine
frame and lying within the circle described by the threshing surfaces b.
The current of air produced by the rotating drum takes its course from the
bottom upwards commencing from the sorting cylinder or sack filler S* S' which
may respectively be open whilst the wheat raised by the elevator E' sliding over
the dividing partitions W of the box N, passes through the current of air in an
opposite direction and so must give up to the latter its lighter admixtures or
impurities. The drum then operates suitably the removal of the threshed straw.
In order to regulate the strength of the current of air corresponding to the weight
of the wheat or other grain which is at the moment to be purified, a throttle
valve D is arranged in the channel C¹. A valve F is also arranged at the bottom
of the purifying or separating box N in case the wheat is to be delivered directly
into sacks, so that during the changing of the sacks and the alterations of the
valve F connected therewith, the one sack inlet is opened and the other closed, so
that an interruption of the current of air is avoided.
Dated this 11th day of Anril 1894
WM. P. THOMPSON & Co.,.
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Threshing Machines.
A communication by HEINRICH LANZ, of Mannheim, in the Empire of Germany.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil 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 :-
The improvements in threshing machines, which form the object of the present
application, relate to an easy and complete purifying of the material threshed,
both by facilitating the separation of the grain from straw, chaft, or the like, as
well as by the subsequent re-purifying of the collected grain from small and
light admixtures. For this object the invention consists, firstly, in the peculiar
arrangement of the sieve and strawshaker, or of the trays leading to them from the
threshing drum, and secondly, in the use of the threshing drum for producing a
current of air which removes the remaining impurities from the collected grain.
Hitherto the grain, which had passed through the openings of the threshing casing
or concave, and was only mixed with chaff, was always again treated along with

page_text: the separated straw by shaking and sieving in order to separate the grain from the
straw and chaff.
This invention consists, firstly, in treating the grain (which has passed through
the openings in the threshing casing and is only mixed with chaff, and is therefore
easier to separate) separately from the grain which is still retained in the threshed
straw. The former amounts to about 75% of the whole corn threshed out, so that
a considerable relief to the shaking apparatus is obtained.
The separation of the two kinds of material delivered from the drum is produced
by openings being arranged in the threshing casing which encloses the drum,
which openings allow the corn and chaff to drop through and to be directly
conveyed by a shute to the chaff-sieve, whilst the drum casing at the end of the
actual threshing casing is closed so that the straw emerging from between the
threshing casing and the drum cannot reach this shute. This straw is treated in
the usual manner and the grain separated therefrom is then added to that obtained
at first. The mass of corn obtained in this manner is subjected to a fresh purifying,
a draught of air caused by the rotation of the threshing drum being utilised for
this purification.
The rapid rotation of the drum causes, in consequence of its centrifugal force,
an outflow of air from its entire circumference, which air is discharged at the ends
of the drum. In this manner the wheat before it leaves the machine is again freed
from chaff, seeds, shells, dust and the like, and these latter substances are directly
conveyed to the other waste products or tailings.
These improvements are shown on the drawings accompanying the Provisional
Specification.
Figures 1 and 2 are sections of details of the machine which is arranged in the
improved manner for the subsequent purifying.
Figure 3 is a section of the machine which shows the arrangements of. the
sieves.
Behind the threshing casing A, a partition or guide-board E is placed. This.
latter however does not, as formerly, open above the collecting tray B, but on to
a new special collecting tray C, which is beneath B and forms with this latter a
shute or channel D through which the grain falling from the openings or meshes
of the threshing casing A can directly reach the chaff sieve K.
The collecting tray B is shortened in order to form an inlet opening in the
channel D, and is connected by means of a guide board F with the casing of
the threshing machine. This part of the material threshed therefore no longer
passes as was formerly the case over the sieve S. On this sieve in fact there
comes only the corn which falls through the straw shaker H, after this corn
has passed over the bottom board G and has been conveyed by means of the
guide board Fou to the collecting tray B. The corn falling through the sieve S
unites again with the corn from the casing A.
The short straw is delivered into the channel T which has a fall either to the
right or to the left, or is removed from the machine in other suitable manner.
In order to complete the subsequent purifying, the threshing machine is provided
with a purifying or separating box N, which neither contains sieves, nor is
subjected to a shaking movement.
A channel ("connects the purifying (or separating) box N with the interior of
the drum by means of an opening O in the right or left of the threshing machine
frame and lying within the circle described by the threshing surfaces b.
The current of air produced by the rotating drum takes its course from the
bottom upwards, commencing from the sorting cylinder or sack filler S' S₁ which
may respectively be open whilst the wheat raised by the elevator E' sliding over
the dividing partitions W of the box N, passes through the current of air in an
opposite direction and so must give up to the latter its lighter admixtures or
impurities. The drum then operates suitably the removal of the threshed straw.
In order to regulate the strength of the current of air corresponding to the weight
of the wheat or other grain which is at the moment to be purified; a throttle

page_text: valve D' is arranged in the channel C. A valve F¹ is also arranged at the bottom
of the purifying or separating box N, in case the wheat is to be delivered directly
into sacks, so that during the changing of the sacks, and the alterations of the
valve F' connected therewith, the one sack inlet is opened and the other closed, so
that an interruption of the current of air is avoided.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. An improved threshing machine characterised by the conveyance directly to
the chaff sieve of the 'threshed material which has passed through openings in
the threshing casing or concave, whilst the material coming from the straw shaker
and which is mixed with short straw is carried back over a bottom board and
reaches the chaff sieve after passing over an elongated sieve.
2. A special form of construction of the threshing machine described in
Claim 1, wherein the action herein before described is attained by the chamber or
casing surrounding the threshing casing being provided with a shute leading
directly to the chaff sieve under the collecting board, and being shut off from the
longitudinal sieve by means of a second guide board or partition, substantially as
described and illustrated.
3. A threshing machine characterised by the dust, shells, seeds and the like
being carried off from the already threshed wheat or the like by means of the
threshing drum which acts as a fan, substantially as described and illustrated.
4. In a threshing machine, the special form of winnowing or suction device
wherein a shute leading from the purifying device opens sideways into the interior
of the iron threshing drum, substantially as described and illustrated.
5. In a threshing machine, the special form of purifying device, wherein the
grain falls over inclined intersecting partitions whilst a current of air passes
through it obliquely or in an opposite direction, substantially as described and
illustrated.
Dated this 2nd day of November 1894.
WM. P. THOMPSON & Co.,
Agents.