IMPROVEMENTS IN CHAFF SIFTERS
Year: 1885

page_text: I FREDERICK JEWELL of 11 Dennett's Grove, Dennett's Road, Queen's Road,
Peckham in the County of Surrey, Corn Chandler, do hereby.declare the nature
of said invention for IMPROVEMENTS IN CHAFF SIFTERS to be as follows:-
:-
The invention has for its object improvements in chaff sifters whereby the dust
is effectually separated from the chaff and delivered at one end of the machine and
the long stuff at the opposite end whilst the sifted chaff is delivered between the
two in addition to which a better and more equal motion is given to the sieves
and facility is afforded for adjustment of the incline of the upper sieve for separa-
ting the long stuff thereby enabling more or less of the latter to be removed as
may be required.
For this purpose I construct an exterior frame which is provided with suitable
flanged rollers to receive a vibrating frame in which the sieves and shoots or
boards are fixed.
The vibrating sieve frame is provided with suitable bearing pieces to run on the
rollers before mentioned and motion is communicated to such sieve frame by a
crank shaft and suitable connections by which means a to and fro motion in a
right line is communicated to the sieves."
The upper sieve which is used to separate the long stuff extends from end to
end of the vibrating frame at a suitable inclination which is capable of adjustment
in the following manner; the said sieve is fixed at one end whilst at the other end,
it is provided with arms or quadrants which work in suitable guides and are
capable of being fixed at the required height by means of bolts or keys.
The lower sieve through which the dust falls extends somewhere about half the.
length of the vibrating frame and at its inner end is fixed to the edge of the dust
conducting shoot or board which extends therefrom at a suitable incline back to,
or beyond the end of the vibrating frame whilst another conducting board or shoot
extending from the opposite end of the sieve frame in a direction towards the
centre conducts the sifted chaff falling thereon to the underside of the machine,
the lower sieve also delivering the chaff falling thereon to the same point.
Suitable guides are fixed in the outer frame to keep the sieve frame down to
the rollers.

page_text: I FREDERICK JEWELL of 11 Dennett's Grove Dennett's Road, Queen's Road,
Peckham in the County of Surrey, Corn Chandler 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 invention has for its object improvements in chaff sifters whereby the dust
is effectually separated from the chaff and delivered at one end of the machine and
the long stuff at the opposite end whilst the sifted chaff is delivered between the
two, in addition to which a better and more equal motion is given to the sieves
and facility is afforded for adjustment of the incline of the upper sieve for
separating the long stuff thereby enabling more or less of the latter to be removed
as may be required.
For this purpose I construct an exterior frame which is provided with suitable
flanged rollers to receive a vibrating frame in which the sieves and shoots or
boards are fixed.
The vibrating sieve frame is provided with suitable bearing pieces to run on the
rollers before mentioned and motion is communicated to such sieve frame by a
crank shaft and suitable connections by which means a to and fro motion in a
right line is communicated to the sieves."
The upper sieve which is used to separate the long stuff extends from end to end
of the vibrating frame at a suitable inclination which is capable of adjustment in
the following manner; the said sieve is fixed at one end whilst at the other end it
is provided with arms or quadrants which work in suitable guides and are capable
of being fixed at the required height by means of bolts or keys.
The lower sieve through which the dust falls extends somewhere about half the
length of the vibrating frame and at its inner end is fixed to the edge of the dust
conducting shoot or board which extends therefrom at a suitable incline nearly
back to, or it might be beyond the end of the vibrating frame whilst another
conducting board or shoot extending from the opposite end of the sieve frame in a
direction towards the centre conducts the sifted chaff falling thereon to the under-
side of the machine, the lower sieve also delivering the chaff falling thereon to the
same point.
Suitable guides are fixed in the outer frame to keep the sieve frame down to the
rollers.
And in order that the said invention may be more clearly understood and
readily carried into effect, I will proceed aided by the accompanying drawings
more fully to describe the same.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal vertical section of a chaff sifter constructed according
to my invention, Figure 2 is a plan with the cover removed, and Figure 3' is a
cross section thereof taken on the line 1, 1, of Figure 1.
a represents the exterior frame which is provided with bearings a¹ within which
are mounted short axles a³ carrying suitable flanged rollers a³ to receive a
vibrating frame b in which the sieves and shoots or boards are fixed.
The vibrating sieve frame b is provided with suitable metal bearing pieces b¹ to
run on the rollers a³ and motion is communicated to such sieve frame b by a
crank c through a connecting rod c² and cross bar 63 which is fixed to the frame b.
The crank shaft c'is fitted at one end with a fly wheel c³ and at the other end
with a drum or pully c which receives motion by a band c from an engine or
other source of power or for small machines a crank handle may be substituted for
the pulley and motion may be given thereto by hand.
Suitable guides a' are fixed in the outer frame a in order to keep the sieve
frame b down to the rollers a³.
By these means a to and fro motion in a right line is imparted to the sieves.
The upper sieve d which is used to separate the long stuff extends from end to
end of the vibrating frame b at a suitable inclination which is capable of adjust-
ment in the following manner.
The sieve d is supported upon a frame d¹ which is fixed by a hinge joint d² at one
end to the vibrating frame b; the frame d' at the other end is provided with arms
or quadrants d³ one at each side of the machine which work in suitable guides d'
and are capable of being fixed at the required height by means of set screws d³ or
bolts or keys.
In the drawings the frame d¹ and sieve d are shown in their lowest or most
inclined position.
The lower sieve e through which the dust falls extends somewhere about half
the length of the vibrating frame b and at its inner end e¹ is fixed to the edge f¹
of the dust conducting shoot or board f which board f extends therefrom at a
suitable inclination nearly back to or it might be beyond the end of the vibrating
frame b and conducts the dust into a well f' whence it passes into a short or
receiver f³.
Another conducting board or shoot g extending from the opposite end of the
sieve frame b in a direction towards the centre of the machine conducts the sifted
chaff falling thereon to a well g' and the lower sieve e also delivers the chaff
falling thereon to the same point whence it passes by a shoot g₁ to the underside
of the machine.. The shoot g is furnished with a sliding door or valve g³ to
regulate or cut off the flow of sifted chaff to the underside of the machine.
The machine is provided with a cover a³ carrying a hopper a through which
the material to be sifted may be fed thereto.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. A chaff sifter consisting of an outer frame a, inner vibrating frame b, upper
sieve d lower sieve e dust conducting shoot or board f and conducting board or
shoot g all arranged and operating in manner substantially as herein shown and
described and for the purpose stated.
2. A chaff sifter consisting of outer frame a provided with guides a¹ and
rollers a³ carrying an inner vibrating frame b containing an adjustable upper
sieve d lower sieve e and conducting boards or shoots f and g all arranged and
operating in manner substantially as herein shown and described and for the
purpose stated.

page_text: 3. A chaff sifter consisting of an outer frame a provided with guides a* and
rollers a carrying an inner vibrating frame b containing an adjustable upper
sieve d lower sieve e and conducting boards or shoots ƒ and g such vibrating frame
receiving motion from an engine or other source of power through shaft c, crank c¹
and connecting rod c² all arranged and operating in manner substantially as herein
shown and described and for the purpose stated..