IMPROVEMENTS IN THE CONSTRUCTION OF THRESHING MACHINING
Year: 1883

page_text: LETTERS PATENT to Edwin Foden of Sandbach in the County of Chester
for an Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF THRESHING
MACHINING"
:
PROVISIONAL SPECIFICATION left by the said Edwin Foden at the Office
.of the Commissioners of Patents on the 21st August 1883.
EDWIN FODEN of Sandbach in the County of Chester
THE CONSTRUCTION OF THRESHING MACHINES"
"IMPROVEMENTS IN
This invention relates first to that part of the threshing machine known as the
"shakers" which are employed for carrying forward the long straw and shaking
out the short straws and corn; and Secondly to the apparatus for sifting or
riddling the corn from the short straws.
+
The objects of the invention are first to obtain an improved shaking motion
with only one set of cranks, and Secondly to economize the cost of the machine
and to decrease the power required for driving the same by doing away with the
necessity for giving reciprocating motion to the whole weight of the tray riddle
box and material as usually practised
For "shakers" I only use one set of cranks placed (by preference) at or near the
lower end, the same being a four throw crank, the first and third throw being
vertical or opposite to the second and fourth.
At or near the other end of the shaker I attach an arm working on a fixed
centre and inclined at an angle leaning towards the crank, so that this end of the
"shakers" has a rising and falling as well as a to-and-fro motion imparted to it,
and an improved shaking motion is thus produced.
As regards the riddling apparatus I dispense with the tray and the movable
riddle box with its crank shaft, spring or other hangers and side springs, and in
place of the tray I have an endless travelling band or chain passing round two
rollers and fitted with: transverse ribs or scrapers, which as the band or chain
travels along carry the short straws with it and allow the corn to fall through the
holes or interstices of the riddle which is fixed just beneath. This riddle is (as
before mentioned) fixed and the sloping board from the drum is carried down to
meet it, so that nothing can fall down but what passes through the said riddle.
The short straws and corn fall down from the drum and the "shakers" onto the
sloping board and the travelling band or chain, and as the latter draws the same
forwards across the riddle the corn falls through and is winnowed in the usual
manner

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edwin Foden in the Patent Office on the 20th February 1884.
EDWIN FODEN of Sandbach in the County of Chester IMPROVEMENTS IN THE
CONSTRUCTION OF THRESHING MACHINES
The principal objects of my invention are to economize the cost of the machine
and to decrease the power required for driving the same and to increase the
durability thereof by doing away with the necessity for giving reciprocating
motion to the whole weight of the tray caving riddle and other parts and thẻ
material as usually practised.
I would here observe that in the Provisional Specification accompanying my
Petition for the Grant of Letters Patent I described also what I then believed to
be a new Improvement relating to the "shakers" but I wish it to be distinctly
understood that although I still propose to use this shaking arrangement I do not
wish to make any claim thereto as a new invention excepting when employed in
combination with my improved riddling apparatus.
The nature of my said invention and the manner of carrying the same into
practical effect will be readily understood on reference to the accompanying
drawings and the following explanation thereof.
Fig 1 on the annexed drawing is a longitudinal section and Fig: 2 a transverse
section of a threshing machine made according to my invention
"
a. a. is the outer casing of the machine supported upon the wheels b. b.—o. c. is
the driving shaft d. d. the drum or beater and 6. c. the " concave f.f. are the
"shakers" and g. g the crank shaft.
For actuating the shakers I use only one set of cranks placed (by preference).at
or near the lower end, the same being a four throw crank the first and third throw
being vertical or opposite to the second and fourth.
At or near the other end of the shaker f. f. I attach an arm h. h working on a
fixed centre and inclined at the upper end at an angle leaning towards the crank
so that this end of the "ahakers" has a rising and falling as well as a to and fro
motion imparted to it and a most effectual shaking motion is thus producod
As regards the riddling apparatus I employ a fixed "caving" riddle ¿¿
I dispense altogether with the tray and the movable "caving" riddle (with its
four throw crank shaft springs hangers and internal side springs) and in place of
the tray 1 employ an endless travelling band j. j. passing round two rollers k. k.
and fitted with fingers or scrapers . which as the band jj travels along carry all
the short straws corn & towards the back end and deliver it upon the fixed caving
riddle . and the band jj in its returning movement drags all the short straws &
over the riddle ii along the board m m and ejects the cavings from the machine
at the same time causing or allowing the corn to fall through the holes or interstices
of the caving riddle which is fixed just beneath it, but so fixed (in any
convenient manner) as to be capable of being changed according to the requirements
of the grain under treatment.
This riddle (as before mentioned) is fixed and the sloping boards n n from
the drum and the sides are carried down to meet it and the band j, j respectively,
so that nothing can fall down but what passes through the riddle.
The short straws and corn fall down from the drum d. daud shakers f. f. down
the sloping boards n. n. and upon tho travelling band and the latter in passing
round the back roller / deposits them onto the fixed riddle i. i. and as the fingers l. l.
then draw the same forwards across the riddle the corn falls through and is
afterwards winnowed in the usual manner

page_text: Having now described the nature and object of my said invention and in what
manner the same is to be performed I wish it to be understood that I claiin as my
invention the combination with a fixed "caving" riddle of an endless band passing
around rollers and provided with fingers or scrapers which drag the short straws &
over the said fixed riddle and cause the corn to fall through the holes or interstices
thereof all constructed and arranged substantially as hereinbefore described and
illustrated by the drawings annexed whether employed in connection with the
straw shaking apparatus referred to or with any other suitable straw shaking
mechanism
In witness whereof I the said Edwin Foden have hereunto set my hand and
seal this Sixteenth day of February in the year of our Lord one thousand eight
hundred and eighty four.
EDWIN FODEN (L.S.