Improvements in Thrashing Machines.
Year: 1889

page_text: Date of Application, 31st May, 1889
Complete Specification Left, 28th Feb., 1890-Accepted, 3rd May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Thrashing Machines.
I, EDWIN FODEN of Sandbach in the County of Chester, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in thrashing machines.
I employ an exhaust fan to accomplish both the first and second dressing of the
grain and also to elevate the chaff and deliver it into bags. This I have before done,
working under patents already granted to me.
The arrangements which I now make are as follows:-
The grain and other material passing through the caving riddle is led by a return
board on to a chaff riddle or perforated surface as heretofore. This louvre board is
fixed in the same box with the caving riddle and therefore receives a shaking move-
ment which causes the grain to pass along the board to its edge and to pass over this
in a stream.
The lighter materials pass onward with the air into a passage in connection with
the eye of the fan, and in this passage there is a valve which serves to regulate the
current of air. The grain descends in a direction opposite to that in which the air
travels, and falls on to a grain riddle which stops the larger impurities and allows the
grain to pass through and to fall upon a seed riddle, which, whilst it stops the grain,
allows small seeds to pass through and out of the machine. From the grain riddle
the grain passes into an elevator; its further passage through the machine is described
later on in this specification. The lighter materials as already stated pass forward
with the air current to the eye of the fan they enter the fan case and this is perforated
around the greater part of its periphery. The perforations allow the dust to pass
through into an outer casing at the bottom of which there is a wide outlet by which
the dust falls to the ground. The chaff is not able to pass through the perforations
of the casing and is propelled upwards out of it by a passage which after ascending
for a distance curves downwards and terminates in mouths to which sacks for
receiving the chaff are applied. I provide two mouths at the fan outlet and a door or
valve by which one or other of these mouths can be placed in connection with the fan
whilst the other is closed. The grain which has received a first dressing, as already
described is raised by the elevator to the upper part of the machine and is there
Here the grain is
delivered into a worm barrel at the end of which works an awner.
submitted to the frictional treatment which it usually receives before the second
dressing. The grain escapes from the awner by a door so adjusted as to offer a
suitable amount of resistance and is then received upon the uppermost of a series of
louvre boards. These louvre boards have a jogging motion imparted to them by
convenient mechanism which causes the grain to pass in streams of uniform thickness
from board to board. Between these louvre boards another stream of air enters and
passes towards the fan. As the air issues from between the boards it taken an upward
course to the entrance of a chamber into which it carries the light corn.
The lip over which the air current passes is adjustable up and down to increase or
diminish at pleasure the distance which the light corn must be carried before it enters
the chamber. The good grain passes along the louvre boards descending from one to
another to a passage which leads it into a rotary screen serving to separate it into
different sizes. After passing the screen the grain is received into sacks. The air
when it enters the light corn chamber loses much of its velocity for the current is here
spread over a considerable area. All but the lightest materials fall down to the
bottom of the chamber and are received into a light corn pocket which is emptied from
time to time. The wind bearing the lightest materials with it still passes up to a
mouth by which it enters descending a passage and by this it is led to the eye of the

page_text: fan. The dust which the air current carries with it passes out by the perforations in
the periphery of the fan and any larger materials are discharged from the fan case
together with the chaff. In the course of the passage from the light corn chamber to
the fan a valve is provided and by means of this valve the current of air passing
between the louvre boards of the second dressing apparatus can be adjusted.
Dated this 31st day of May 1889
CARPMAEL & Co.,
Agents.
r
COMPLETE SPECIFICATION.
Improvements in Thrashing Machines.
I, EDWIN FODEN, of Sandbach, in the County of Chester, Engineer, do hereby
declare the nature of this invention and in what manner the same is to he
performed to be particularly described and ascertained in and by the following
statement:
This invention has for its object improvements in thrashing machines.
I employ an exhaust fan to accomplish both the first and second dressing of the
grain and also to elevate the chaff and deliver it into bags. This I have before done,
working under patents already granted to me.
The arrangements which I now make are as follows and are shown in the annexed
drawings.
Figure 1 being a longitudinal vertical section.
Figure 2 a transverse vertical section on the line 1. 1 Figure 1.
Figure 3 a horizontal section on the line 2. 2 Figure 1.
Figure 4 a vertical transverse section on the line 3. 3 Figure 1.
Figure 5 a horizontal section on the line 4. 4 Figure 1 and
Figure 6 a vertical section on the line 5. 5 Figure 5.
The grain and other material passing through the caving riddle a is led by a
return board b on to a chaff riddle or perforated surface e as heretofore. This chaff
riddle is fixed in the same box with the caving riddle and therefore receives a shaking
movement which causes the grain to pass along the board to its edge and to pass over
this in a stream.
The fan d draws air through the chaff riddle c. Tho lighter materials pass onward
with the air into a passage e in connection with the eye d¹ of the fan d and in this
passage there is a valve which serves to regulate the current of air. The grain
passes through the chaff riddle c onto the return board g and from the end of this
onto the grain riddle which stops the larger impurities and allows the grain to
pass through and to fall upon a seed riddle which, whilst it stops the grain, allows
small seeds to pass through and out of the machine. From the grain riddle the
grain passes by the spout k into an elevator 1; its further passage through the
machine is described later on in this specification. The lighter materials as already
stated pass forward with the air current to the eye d' of the fan d they enter the
fan case d and this is perforated around the greater part of its periphery. The
perforations allow the dust to pass through into an outer casing d at the bottom
of which there is a wide outlet dy by which the dust falls to the ground. The
chaff is not able to pass through the perforations of the casing and is propelled
upwards out of it by a passage m which after ascending for a distance curves
downwards and terminates in mouths n n to which sacks for receiving the chaff are
applied. provide two mouths at the fan outlet and a door or valve o pivotted at o
by which one or other of these mouths can be placed in connection with the fan
whilst the other is closed. The grain which has received a first dressing, as already
.described, is raised by the elevator to the upper part of the machine the lower part
only of the elevator is shown in Figure 1 the upper part being hidden by the
machine, and is there delivered into a worm barrel p at the end of which works an
awner g. Here the grain is submitted to the frictional treatment which it usually
receives before the second dressing. The grain escapes from the awner by a door r

page_text: so adjusted as to offer a suitable amount of resistance the axis of the door carrying
the weighted lever I (Figure 5) and is then received upon the uppermost of a series
of louvre boards & s s. These louvre boards have a jogging motion imparted to them
from the shoe by a lever t and rods t t which causes the grain to pass in streams
of uniform thickness from board to board. Between these louvre boards s another
stream of air enters and passes towards the fan. As the air issues from between the
boards it takes an upward course to the entrance of a chamber u into which it
carries the light, corn. The lip u over which the air current passes is adjustable up
and down to increase or diminish at pleasure the distance which the light corn must
be carried before it enters the chamber. The good grain passes along the louvre
boards s descending from one to another to a passage which leads it into a rotary
screen w serving to separate it into different sizes. After passing the screen the
grain is received into sacks. The air when it enters the light corn chamber u loses
All but
much of its velocity for the current is here spread over a considerable area.
the lightest materials fall down to the bottom of the chamber and are received into a
light corn pocket u" which is emptied from time to time. The wind bearing the
lightest materials with it still passes up to a mouth by which it enters descending a
passage and by this it is led to the eye d¹ of the fan d. The dust which the air
current carries with it passes out by the perforations in the periphery of the fan and
any larger materials are discharged from the fan case together with the chaff. In
the course of the passage from the light corn chamber to the fan a valve is provided
and by means of this valve the current of air passing between the louvre boards of
the second dressing apparatus can be adjusted.
Having now particularly 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 :-
The combination with an awner or like instrument of louvre boards and air currents
substantially as described.