An Improved Grain Heating or Drying Machine.
Year: 1891

page_text: COMPLETE SPECIFICATION.
An Improved Grain Heating or Drying Machine.
I, DIEDRICH MOHR, Merchant, of Elmshorn, Schleswig Holstein, in the Empire
of Germany, 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 :-
This invention relates to machines for heating or drying grain and consists in an
improved machine having means for the more effective employment of the drying
air by the use of an exhaust and special arrangement of the pipes or ducts for the
drying air and for the steam intended for heating the machine.
The improved machine is represented in the accompanying drawing in which
Fig. 1 is a central vertical section of the machine on line m m Fig. 2. Fig. 2 is a
plan or horizontal section on line y y Fig. 1. Fig. 3 is a vertical cross section on
line
Fig. 2. Fig. 4 is a horizontal section on line 9g Fig. 3. Fig. 5 is an
elevation of the machine and Fig. 6 a horizontal section on line w w Fig. 3.
The machine consists of a cylinder made up of a number of superposed cylindrical
chambers a a¹ a² a³ etc. each with a double floor r r² p2 p³ etc. The vertical shaft B
passes through the centre of each chamber and carries above each double floor a
raking apparatus P P1 P2 P3 etc. consisting of plates ppl p² p³ etc. arranged at an
angle of the direction of their movement so that on alternate floors the grain is
moved from the circumference towards the centre, and on the other floors
from the centre towards the circumference by the action of said rakes. In
this manner the grain falls and passes from the top chamber successively through
the lower chambers until it reaches the lowest chamber passing alternately through
the openings and h at the circumference and at the centre of the respective floois
eventually leaving the machine at the outlet D in the lowest floor.
The air used for drying the grain enters through pipe g into a space L under the
lowest chamber, this space L is divided by a spiral partition o into a spiral passage
so that the air following this passage is warmed by the heat from the floor of the
lowest chamber thence from the rising pipe t, the warmed air passes into each
chamber and is drawn off through pipe C by a suitable exhaust the draught of
which causes the current of air to pass through the machine.
The steam for heating the machine passes from the steam pipe E through the
branch pipes e e e e etc. into the spaces within the double floors of each chamber
and leaves through the pipe E'. To cause the steam to circulate in each floor the
latter is provided as in Fig. 4 with a radial partition f extending from the centre to
between the inlet and outlet of the steam; a circular partition " also divides the
space into an inner and outer portion the ducts and project from the interior
of the partition to the steam inlet and outlet respectively. Also an outer circular
partition divides the outer space outside the partition and the openings or
ducts and place the space between the partitions and f² in communication
with the steam inlet and outlet respectively. The entering steam divides and passes
into the spaces divided by the partitions ff and 2 following these spaces and
issuing again into the outlet pipe.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A grain heating or drying machine consisting of a number of superposed
cylindrical chambers a a¹ a² a³ etc., having the steam heated floors r r¹ p² ³ etc., and
rotary rake systems p p² p² p³ etc., for moving the grain alternately from centre to
circumference and from circumference to centre in consecutive chambers.

page_text: 2. A. grain heating or drying machine consisting of superposed chambers with
steam heated floors and having an air heating space L under the lowest floor said
space being divided spirally by partition o for heating the air to be supplied to said
chambers.
3. A grain heating or drying machine consisting of superposed cylindrical 5
chambers with double floors 23 etc., with partitions fff dividing the space
within each double floor, ducts z 2¹³ ³ steam feed pipe E and steam exhaust pipe E¹
substantially as and for the purpose set forth.
Dated this 11th day of March 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., Agents to Applicant.