Year: 1899

page_text: I, FREDERIC ALFRED ANDERSON, of 65, Palace Gardens Terrace, in the County
of Middlesex, Analytical Chemist, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to automatically and continuously inake solutions of
definite strength.
For this purpose the solid to be dissolved is placed in a closed tank to which two
pipes are connected, one leading from a tank to which the solvent is supplied, and
the other being a delivery pipe leading to an overflow at a suitable height above the
tank.
A third pipe is also provided connecting the lower end of the delivery pipe to the
supply tank, opening into the latter above its bottom. The strength of the solution
obtained depends upon the difference of level between the overflow from the delivery
pipe and the overflow from the supply tank to this third pipe. This difference of
level may preferably be made adjustable to regulate or alter the strength of the solu-
tion by altering the height of the overflow from the supply tank or of that from the
delivery pipe or of both of them.
When the apparatus is at work the solvent introduced into the supply tank flows
down the supply pipe into the closed tank, displacing solution which rises up the
delivery pipe and runs out at the overflow.
If the solution at any time is too strong, the column of it in the delivery pipe
more than counterbalances the column of solvent in the supply pipe, and the
solvent consequently rises and overflows down the third pipe, and mixing with
the solution in the delivery pipe dilutes it until its gravity is diminished.
On the other hand if the solution is too weak there is no overflow of solvent from
the supply tank and consequently no dilution of the solution in the delivery pipe
until the solution in the latter is so far replaced by stronger solution from the tank
as to cause the level of the solvent to rise to the overflow.
Thus the strong solution from the tank and the overflow solvent automatically mix
at the bottom of the delivery pipe in such proportions that the outflowing solution is
of definite and invariable strength.
Dated this 25th day of May 1899.

page_text: Pro Apparatus for making solutions.
I, FREDERIC ALFRED ANDERSON, of 65, Palace Gardens Terrace, in the County of
Middlesex, Analytical Chemist, 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 automatically and continuously make solutions of
definite strength.
For this purpose the solid to be dissolved is placed in a tank to which two pipes
are connected, one leading from a tank to which the solvent is supplied, and the
other being a delivery pipe leading to an overflow at a suitable height above.
A third pipe is also provided connecting the lower end of the delivery pipe to the
supply tank, opening into the latter above its bottom. The strength of the solution
obtained depends upon the difference of level between the overflow from the delivery
pipe and the overflow from the supply tank to this third pipe. This difference of
level may preferably be made adjustable to regulate or alter the strength of the
solution by altering the height of the overflow from the supply tank or of that from
the delivery pipe or of both of them.
Figures 1 and 2 are side elevations (partly in section) of two forms of apparatus
made according to this invention. The scale may be assumed to be about that
shown but the dimensions may be greatly varied. The longer the pipes the greater
is the sensitiveness of the appliance.
C'
Part of
a is the supply tank into which solvent is gradually run. b is the pipe connecting
this tank to the tank c containing the solid to be dissolved. d is a pipe connecting
the tank to the outlet weir e in a tank f provided with an outlet pipe g.
the pipe d is preferably made flexible as shown so that the weir e can be raised or
lowered relatively to a. his a pipe connecting an overflow weir j from the tank a to
the pipe at a point a short distance above its lowest part. k and are cocks on
the pipes and d. m (Figure 1) is a manhole opening into the tank c, and n
(Figure 2) is an overflow pipe from it.
To charge this tank the cocks and are closed and in the case of Figure I the
manhole m is opened. The liquid displaced by the solid introduced flows out
by the manhole m (which is then reclosed) or pipe as the case may be after which
the cocks and I are opened.
When the apparatus is at work the solvent introduced into the supply tank a flows
down the supply pipe 6 into the tank c, displacing solution which rises up the delivery
pipe d and runs out at the overflow weir e.
If the solution at any time is too strong, the column of it in the delivery pipe d
more than counterbalances the column of solvent in the supply pipe b, and the solvent
consequently rises and overflows down the third pipe h and mixing with the solution
in the delivery pipe d dilutes it until its gravity is diminished.
On the other hand if the solution is too weak there is no overflow of solvent from
the supply tank a into the pipe h and consequently no dilution of the solution in the
delivery pipe d until the solution in the latter is so far replaced by stronger solution
from the tank c as to cause the level of the solvent to rise to the overflow j.
Thus the strong solution from the tank c and the overflow solvent automatically
mix at the bottom of the delivery pipe d in such proportions that the outflowing
solution is of definite and invariable strength.
Preferably the outlet tank fand weir e are of exactly the same size and form as
the inlet tank a and weir j so that any alteration in the rate of supply of the solvent
does not affect the working of the apparatus.

page_text: 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. An apparatus for making solutions having an overflow from the solvent supply
connected to the solution delivery so that if the column of solution in the delivery is
heavier than the column of solvent in the supply, solvent overflows into the delivery
and dilutes the solution in it until the columns again balance.
2. Apparatus for making solutions substantially as described and illustrated in the
drawings.
n
this 20th
1000