Method of and Apparatus for Removing Dust from Chaff.
Year: 1898

page_text: PROVISIONAL SPECIFICATION,
Method of and Apparatus for Removing Dust from Chaff.
I, ARTHUR SAMUEL FRANCIS ROBINSON, of The Vale of White Horse Iron
Works, Wantage, in the County of Berks, Engineer, do hereby declare the nature
of this invention to be as follows::
-
This invention has reference to a method of and machinery or apparatus for
cleaning chaff by separating and carrying away therefrom by means of an air
current the dust which it contains and it has for object to provide apparatus for
this purpose which may be conveniently constructed integral with or attached
to chaff cutting or elevating apparatus of existing design.
According to one construction, the apparatus comprises an air exhausting
device such as a fan or blower, a fine sieve, and an endless band elevator these
parts being enclosed in suitable casings provided with shutes or spouts. The
arrangement is such that in operation the elevator throws the chaff against the
sieve, through which the dust that is mixed with the chaff is carried by a current
of air induced by the fan which is situated in or at the termination of a casing
above it. The elevator is arranged at an angle to the vertical, so that after pass-
ing along the sieve, the chaff is free to fall into any desired receptacle or to the
floor, and a casing is or may be fitted or arranged in connection with the sieve
for the purpose of preventing dispersion of the chaff and for guiding it to the
spot or receptacle where it is desired that it may accumulate. The sieve is or
may be arranged with a downward slope (as from the top of the elevator) so
that any small particles of chaff which may be carried through it may work
their way downwards and fall from the lower end, assisted in this by the vibra-
tion to which the apparatus is normally subjected when in use. In order that
the said particles may in falling rejoin the bulk of the chaff, a small space is or
may be allowed or provided between the lower end of the sieve and its casing.
The elevator may consist of an endless belt of textile material such as canvas
provided with transverse strips or paddles of wood upon its surface, and arranged
to work within a casing over and round upper and lower rollers or wheels
having fixed axes and one or both of which is or are adapted to be rotated
mechanically. The upper end of the elevator is or may be provided with two
outlets controlled by a tip door so that two bags may be attached to the outlets
and either of them be fed with cleaned chaff at will, by suitably adjusting the
position of the door, without interfering with the cleaning of the chaff.
The action of the paddles in delivering cut material against the sieve is such
that any particles of chaff which may tend to adhere to the sieve are carried
away by subsequent deliveries of chaff against the sieve.
The dust from the chaff is or may be led away from the elevator in any desired
direction by a casing or spout which is or may be provided with a sleeve or
receptacle of cotton or other fabric.
The air and dust suction device is or may be a centrifugal fan mounted with
its axis horizontally and in this case, in order to approximately equalize the

page_text: draught through the whole area of the sieve, inclined shutes, plates or boards
are or may be disposed between the sieve and the fan centre.
Dated this 28th day of November 1898.
and Apparatus for mo
Dust from Chan,
I, ARTHUR SAMUEL FRANCIS ROBINSON, of The Vale of White Horse Iron
Works, Wantage, in the County of Berks, 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:-
r
-
This invention has reference to a method of and machinery or apparatus for
cleaning chaff by separating and carrying away therefrom by means of an air
current the dust which it contains and it has for object to provide apparatus for
this purpose which may be conveniently constructed integral with or attached
to chaff cutting or elevating apparatus of existing design as I shall now describe
with reference to the accompanying drawings wherein Fig. 1 is a vertical
section on the line AA of Fig. 2, and Fig. 2 is a vertical section on the line BB
of Fig. 1 showing one construction of apparatus according to this invention.
In the construction shown, the apparatus comprises an air exhausting device
such as a fan or blower a, a fine sieve b, and an endless band elevator c, these
parts being enclosed in suitable casings d and e respectively, provided with
shutes or spouts. The arrangement is such that in operation the elevator c
throws the chaff against the sieve b through which the dust that is mixed with
the chaff is carried by a current of air induced by the fan a which is situated in
or at the termination of the casing & above the sieve. The elevator c is arranged
at an angle to the vertical, so that after passing along the sieve, the chaff is
free to fall into any desired receptacle or to the Hoor. In the example shown a
casing is fitted or arranged in connection with the sieve 6 for the purpose of
preventing dispersion of the chaff and for guiding it to the spot or receptacle
where it is desired that it may accumulate. The sieve may, as shown, be
arranged with a downward slope so that any small particles of chaff which may
be carried through it may work their way downwards and fall from the lower
end, assisted in this by the vibration to which the apparatus is normally sub-
jected when in use. In order that the said particles may in falling rejoin the
bulk of the chaff, a small space or channel h is or may be allowed or provided
between the lower end of the sieve and its casing.
The elevator c may consist of an endless belt of textile material, such as canvas,
provided with transverse strips or paddles c¹ of wood upon its surface, and
arranged to work within the casing d over and round upper and lower rollers
or wheels i, only the upper of which is shown, having fixed axes and one or both
of which is or are adapted to be rotated mechanically. The casing at the
upper end of the elevator may as shown be provided with two outlets g¹, g² con-
trolled by a tip door k so that two bags may be attached to the outlets and either
of them be fed with cleaned chaff at will, by suitably adjusting the position of
the door, without interfering with the cleaning of the chaff.
As will be readily seen the action of the paddles in delivering cut material
against the sieve 6 is such that any particles of chaff which may tend to adhere
to the sieve are carried away by subsequent deliveries of chaff against the sieve.

page_text: The dust from the chaff may be led away in any desired direction from the
casing d through a spout which is or may be provided with a sleeve or receptacle
of cotton or other fabric to collect the dust.
In order to approximately equalise the draught through the whole area of
the sieve b, inclined shutes, plates or boards m are or may be disposed as shown
between the sieve 6 and the fan centre through which the dust laden air is
drawn.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. Removing dust from chaff substantially in the manner and by the means
herein before described with reference to the drawings annexed.
2. Apparatus for removing dust from chaff constructed arranged and operat-
ing substantially as herein before described with reference to and shown in the
drawings annexed.
Dated this 28th day of August 1899.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.