Improvements in the Manufacture of Bleaching Powder and like Compounds and in Apparatus therefor.
Year: 1892

page_text: Date of Application, 7th Nov., 1892
Complete Specification Left, 8th Aug., 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Bleaching Powder and like
Compounds and in Apparatus therefor.
We, WILLIAM JOHN FRASER and LESLIE MCGREGOR FRASER, of
98, Commercial Road, in the County of London, Engineers, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in the manufacture of bleaching powder
and like compounds and in apparatus therefor.
In carrying out our invention we employ a vertical chamber or tower' made of
suitable material fitted inside with an elevator (worked from the outside by a band
and pulley) for the purpose of raising and distributing the lime or other material
and absorbs more rapidly and
used in the process in such a manner that it takes chlorine or other gases with
efficiently and in larger quantities than hitherto
which it has to be thoroughly incorporated.
The elevator is advantageously of the "bucket" principle and raises the lime or
other material continuously from the bottom of the chamber to the top or
thereabouts and discharges it over fixed perforated inclined planes from which it
descends through the gas to the bottom of the chamber and again ascends by the
continuous operation of the elevator.
Our chamber or tower is fitted with an inclined bottom and " discharging" door
and also with a gas-tight feeding door.
In connection with the chamber or tower we employ a condenser or cooling
apparatus consisting of earthenware or other pipes fixed to the outside of the
chamber or enclosed in a water trough for the purpose of cooling the gases as they
become heated.
Dated the 7th day of November 1892
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Bleaching Powder and like
Compounds and in Apparatus therefor.
.
We, WILLIAM JOHN FRASER and LESLIE MCGREGOR FRASER, of
98, Commercial Road, in the County of London, Engineers, 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:-
This invention relates to improvements in the manufacture of bleaching powder
and like compounds and in apparatus therefor.
In carrying out our invention we employ a vertical chamber or tower made of
suitable material fitted inside with an elevator (worked from the outside by a band
and pulley) for the purpose of raising and distributing the line or other material
used in the process in such a manner that it takes up and absorbs more rapidly and
efficiently and in larger quantities than hitherto the chlorine or other gases with
which it has to be thoroughly incorporated.
The elevator is advantageously of the "bucket" principle and raises the lime or
other material continuously from the bottom of the chamber to the top or there-
abouts and discharges it over fixed perforated inclined planes from which it
descends through the gas to the bottom of the chamber and again ascends by the
continuous operation of the elevator.
Our chamber or tower is fitted with an inclined bottom and has a "discharging
door and is also provided with a gas-tight feeding door.
"

page_text: In connection with the chamber or tower we employ a condenser or cooling
apparatus consisting of earthenware or other pipes fixed to the outside of the
chamber, which condenser may be enclosed in a water trough for the purpose of
cooling the gases as they become heated.
In order to enable our invention to be fully understood we will describe the same
by reference to the accompanying drawings, in which―
Figure 1 is a vertical section; and,
Figure 2 a plan of our improved apparatus for the manufacture of bleaching
powder and like compounds.
a is the vertical tower and b the elevator fitted therein. The elevator shewn
in the drawings is on the "bucket" principle but it will be obvious that other kinds
of elevators may be employed. It is worked from the outside by a pulley driven
by a belt.
c, c represent two of the fixed perforated inclined planes or baffle plates over
and through which the lime is discharged from the elevator b; d represents the
inclined bottom of the tower and e a chamber in communication with the tower a
by the opening f.
9 represents a hinged chute for the discharge of the finished powder, such chute
being operated by a lever outside the apparatus. is the gas-tight feeding
hopper of the tower a; j, j man-hole doors; the inlet for the gas and k the outlet
for the same.
m, m represent the condenser or cooling apparatus fixed outside the
tower a which is advantageously enclosed in a water trough m¹. pl is a door for
emptying the tower a when required.
The operation is as follows:-The lime or other material is fed into the tower
through the hopper and the gas enters through the inlet . The elevator b being
set in motion the lime will be continuously raised from the bottom of the tower
and delivered onto the upper perforated baffle plate c, from and through which it
falls onto the plate or plates e¹ below, and this is repeated until the lime has taken
up and thoroughly absorbed a sufficient quantity of the chlorine or other gas in the
tower.
When the lime or other material has become thoroughly incorporated with the
gas it is discharged by means of the hinged chute y (which is moved into the
position shewn in Figure 1 of the drawings above the baffle plate c) into
the chamber e from which it can be withdrawn through the discharge door n.
The hinged chute g is moved up out of the way into the position indicated by the
dotted lines except when the powder is to be discharged.
The gas will be kept cool by passing through the condenser cutering through the
pipes o, o and passing back into the tower through the pipe p.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. In apparatus for the manufacture of bleaching powder and like compounds,
the combination with a vertical tower or chamber of an elevator placed within
the tower and arranged and operating substantially as, and for the purposes,
described.
2. The combination with an apparatus such as that claimed in Claim 1 of a
condenser or cooler as, and for the purpose described.
3. The combination of parts forming the improved apparatus for the manufacture
of bleaching powder and like compounds arranged and operating substantially in
the manner and for the purpose hereinbefore described and illustrated in Figures 1
and 2 of the accompanying drawings.
Dated the 8th day of August 1893
G. F. REDFERN &. Co.,
4, South Street, Finsbury, London, Agents for the Applicants.