Improvements in or relating to Purifiers for Cereals and the like.
Year: 1899

page_text: Date of Application, 8th Dec., 1899
1900
Complete Specification Left, 24th Aug., 1900-Accepted, 1st Dec.,
PROVISIONAL SPECIFICATION,
Improvements in or relating to Purifiers for Cereals and the like.
We, ARTHUR CRABTREE, of The Causeway, Maldon, in the County of Essex, and
SAMUEL PORTER GARRATE, of 10, Market Hill, Maldon, in the County of Essex,
Millers, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to separate wheat and other cereals or similar
materials from impurities, such as dust, and also from rough or heavy substances.
For this purpose we construct an apparatus comprising broadly three compart-
ments, viz.:
(a) A middle compartment in which a fan is arranged and with the upper end
of which compartment communicates a spout or leg through the lower end of
which the cereal or other material is discharged, while such leg or spout forms
the air inlet to the fan chamber.
(b) An upper compartment into which the fan discharges and from which a
passage leads to the point where the material to be treated is fed into the machine,
and
(e) A lower compartment containing a vibrating sieve on to which the material
to be treated passes from the feed opening or inlet, and below which is a space
containing a travelling brush or gatherer which conveys the impurities passing
through the sieve to a worm or other conveyor.
The fan is of any suitable construction and actuated by any suitable means, and
the air drawn by same through the leg or spout, through the bottom end of which
the material is delivered, carries with it any impurities still left in such material
after it is discharged from the sieve, and entering the top of the middle chamber
it passes down to the bottom thereof, a vertical partition being arranged therein
so as to form a passage communicating at its lower end with such middle compart-
ment, and below which passage a channel is formed provided with a conveyor lead-
ing to a discharge spout. The air entering the middle chamber expands and the
end
impurities it contains fall down and are carried by the conveyor to the discharge
spout. The air admission leg is provided with a valve at or near its upper
to regulate the admission of air through same to the middle or fan chamber.
The air passes from the middle expansion chamber, preferably through a second
smaller expansion chamber, to the fan inlet.
The fan discharges into the top or upper compartment or chamber, in which
an opening provided with a valve is arranged to relieve such chamber from any
excess pressure, and the air so discharged passes outside and down to or near the
5 lower end of the middle compartment, where the inlet for feeding the material
to be purified into the machine is situated.
The feed is delivered through a shoot below the bottom of the middle compart-
ment on to a sieve of any suitable construction and material and vibrated by any
suitable means (such as eccentrics and connecting rods), and arranged at the
upper part of the lower compartment, and in its passage from the feed spout to
0 the sieve such feed is exposed to the action of the air current so that the light

page_text: impurities are separated from the material to be purified and carried off by such
current to the air outlet, which is situated just below the feed inlet.
A space is left between the head of the sieve and the inside of the case so as
to permit any heavier portions of the impurities, which are influenced by the
air current but not carried off through the air outlet, to fall into the lower com-
partment.
By the vibration of the sieve the heaviest impurities which still remain mixed
with the material are caused to pass through the meshes of the sieve and collect
on the bottom of the lower compartment whence they are carried by a travelling
brush conveyor to a channel containing a screw or other conveyor and discharged
through a suitable spout.
Any material heavier and larger than that to be treated (such as stones &c.)
will pass over the tail end of the sieve into a suitable channel, and be discharged
through a spout.
The material itself travels down to the tail end of the sieve, where it is dis-
charged through an outlet provided with a valve for regulating such discharge
and communicating with the lower end of the air inlet or spout connected with
the upper end of the middle or fan compartment, in entering which it is (as above
stated) submitted to the action of the entering air which carries off any impurities
still remaining in the material, while the purified material is delivered through
the lower end of such spout.
Dated this 8th day of December 1899.
ALLISON BROS.,
Agents for the Applicants.
COMT LINIE SPECIFICATION.
Improvements in or relating to Puriflers for Cereals and the like.
We, ARTHUR CRABTREE, of The Causeway, Maldon, in the County of Essex, and
SAMUEL PORTER GARRATT, of 10, Market Hill, Maldon, in the County of Essex,
Millers, 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 object of this invention is to separate wheat and other cereals or similar
materials from impurities, such as dust, and also from rough or heavy substances.
For this purpose we construct an apparatus comprising broadly three com-
partments, viz.:
(a) A middle compartment in which a fan is arranged and with the upper end
of which compartment communicates a spout or leg through the lower end of
which the cereal or other material is discharged, while such leg or spout forms the
air inlet to the fan chamber.
(b) An upper compartment into which the fan discharges and from which a
passage leads to the point where the material to be treated is fed into the machine,
and
(c) A lower compartment containing a vibrating sieve onto which the material
to be treated passes from the feed opening or inlet, and below which is a space
containing a travelling brush or gatherer which conveys the impurities passing
through the sieve to a worm or other conveyor.
An apparatus constructed in accordance with this invention is illustrated in the
accompanying drawing, in which :-
:-
Fig. 1 is a longitudinal section through the machine, and
Fig. 2 a transverse section on the line -y, Fig. 1,

page_text: The fan 1 is of any suitable construction and actuated by any suitable means,
and the air drawn by same through the leg or spout 2, through the bottom end of
which the material is delivered, carries with it any impurities still left in such
material after it is discharged from the sieve 3, and entering the top of the middle
chamber 4 it passes down to the bottom thereof, a vertical partition 5 being
arranged therein so as to form a passage 6 communicating at its lower end with
such middle compartment, and below which passage a channel 7 is formed provided
with a conveyor 8 leading to a discharge spout. The air entering the middle
chamber 4 expands and the impurities it contains fall down and are carried by
the conveyor 8 to the discharge spout. The air admission leg 2 is provided with
a valve 9 at or near its upper end to regulate the admission of air through same to
the middle or fan chamber 4.
The air passes from the middle expansion chamber 4, preferably through a
second smaller expansion chamber 10, to the fan inlet 11.
The fan 1 discharges into the top or upper compartment or chamber 12, in
which an opening 13 provided with a valve (not shown) is arranged to relieve
such chamber from any excess pressure, and the air so discharged passes through
a conduit 14 outside and down to or near the lower end of the middle compart-
ment, 4, where the inlet for feeding the material to be purified into the machine
is situated.
The feed is delivered through a shoot 15 below the bottom of the middle compart-
ment 4 on to a sieve 3 of any suitable construction and material, which is sup-
ported by rods 27 and is vibrated by any suitable means (such as eccentrics 17
and connecting rods 18), and is arranged at the upper part of the lower compart-
ment 19. In its passage from the feed spout 15 to the sieve 3 such feed is exposed
to the action of the air current passing from the end of conduit 14. so that the
light impurities are separated from the material to be purified and carried off
by such current to the air outlet 20, which is situated just below the feed inlet.
A space 21 is left between the head of the sieve and the inside of the case so
as to permit any heavier portions of the impurities, which are influenced by the
air current but not carried off through the air outlet 20, to fall into the lower
compartment 19.
The shoot 15 is preferably provided with a valve 28 to prevent the current of
air from conduit 14 entering same, and a valve 29 may also be used to prevent
such air entering the frame or box 30 carrying the sieve 3.
An adjustable valve 31 is also preferably provided to prevent any pure grain
mixing with the impurities separated from the feed by the air current from
conduit 14, such valve 31 being of such height that it will intercept the pure grain
before the air current is able to deflect its course sufficiently for it to pass through
space 21 into the lower compartment 19.
By the vibration of the sieve 3 the heaviest impurities which still remain mixed
with the material are caused to pass through the meshes of the sieve and collect
on the bottom of the lower compartment 19, whence they are carried by a travel-
ling brush conveyor 22 to a channel 23 containing a screw or other conveyor 24
and discharged through a suitable spout.
Any material heavier and larger than that to be treated (such as stones etc.) will
pass out at the tail end of the sieve 3 through an opening A into a suitable
channel, and be discharged through a spout, while the wheat and smaller matter
will pass through the tail end of the sieve, which is of larger mesh than the upper
O part, and fall on to a plate B down which it travels to the outlet C.
If desired the passage of the material over the sieve 3 may be facilitated by the
employment of a tapping attachment 26, acting on the lower side of such sieve
and operated by any suitable means.
The outlet C through which the material is discharged is provided with a
5 valve 25 for regulating such discharge and communicating with the lower end of
the air inlet or spout 2 connected with the upper end of the middle or fan com-
partment 4, in entering which it is (as above stated) submitted to the action of the

page_text: entering air which carries off any impurities still remaining in the material, while
the purified material is delivered through the lower end of such spout.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:-
-
1. The improved apparatus for purifying cereals and the like consisting in a
fan working in a middle expansion chamber and drawing air into same near the
top through a leg also forming the discharge outlet for the purified material, such
fan discharging the air current into an upper chamber from whence it passes down
to the top of a third under chamber at a point where the material to be treated is
caused to enter through a suitable shoot and to fall upon a vibrating sieve
arranged at the top of such under chamber and terminating over an opening com-
municating with the lower end of the air inlet leg, substantially as specified.
2. The combination with the arrangement set forth in the preceding claim of a
second smaller expansion chamber communicating with the main middle expansion
chamber and also with the fan inlet, substantially as specified.
3. The combination with the arrangement set forth in Claim 1 of a conveyor
for discharging the material separated from the entering air in the expansion
chamber, substantially as specified.
4. The combination with the arrangement set forth in Claim 1 of a brush.con-
veyor arranged in the bottom chamber for carrying the impurities separated from
the material to be treated to a channel in which works a screw or other conveyor
so as to discharge such impurities outside the machine, substantially as specified.
5. The combination with the arrangement set forth in Claim 1 of suitable
valves for regulating the air current and also the feed and discharge, substantially
as specified.
6. The improved purifier for cereals and the like constructed and operating
substantially as described.
Dated this 24th day of August 1900.
ALLISON BROS.,
Agents for the Applicants.