Improvements in Apparatus for Mixing Liquids with Liquids and. Solids.
Year: 1892

page_text: Date of Application, 18th Mar., 1892-Accepted, 14th May, 1892
COMPLETE SPECIFICATION.
Improvements in Apparatus for Mixing Liquids with Liquids and.
Solids.
We, SAMUEL HENRY JOHNSON and CHRISTOPHER CLARKE HUTCHINSON
of the Engineering Works, Stratford, in the County of Essex, Mechanical
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 has for its object the more advantageous utilization of the induced
current produced by centrifugal force when a disc is rotated in a liquid which
wets it, for the purpose of agitating, mixing or circulating the contents of
vessels consisting of one or more liquids or partly of liquid and partly of solid
matters.
In carrying out this our invention, which is particularly applicable in cases.
where from various causes, such as differences in the specific gravities of the
substances under treatment, difficulty in mixing is experienced, or where more-
intimate and perfect mixture is required with the least consumption of power, we
use a combination of a rotating disc with one or more fixed pipes or channels.
arranged so as to concentrate the current and direct it where the greatest
mechanical effect is needed, and in such combinations we sometimes modify the
rotating disc by removing the centre portion so that the current of liquid conducted
through the fixed directing tube may pass through the centre of the annular
rotating disc to maintain the current induced on the opposite side of the disc,.
that on the other side being supplied by the liquid travelling along outside the
conducting tube.
In order that this our invention may be more particularly described and ascer-
tained we shall now take three typical cases and explain them by references to the
drawings.
Fig. 1 is a diagram showing the rotating disc D, the shaft S, and the vessel V,
the upper conducting pipe P and the lower one P¹, the horizontal hatching
representing the liquid, and the arrows the direction of the induced currents.
The current induced by this arrangement draws the materials from the top and
bottom layers in the vessel V, and mixes them at the periphery of the
rotating disc.
Fig. 2 is a diagram showing the fixed conducting pipe P placed above the
rotating disc D, and the special construction of the latter whereby the flow of the
liquid is conducted from above through and delivered underneath the rotating disc,
the direction of current and materials operated upon being indicated as before.
This arrangement is adapted to mix a floating solid or liquid with a liquid of
greater specific gravity beneath, or a solid or liquid added at the top of the vessel
to a semi-fluid or viscous magma.
Fig. 3 is a diagram showing the fixed pipe P below the rotating disc D, and is.
adapted to keep a heavy or granular solid or heavy liquid in suspension in liquid
of less specific gravity.
Fig. 4 is a section on A B showing a suitable section and mode of attachment.
of the arms a a connecting the annular rotating discs with the driving boss on
shaft S, constructed with a view to reduce the resistance of the arms to the
passage of the liquid through the revolving disc.
It is obvious that modifications as to shape of the containing vessel, direction of
the rotating shaft, or of the leading pipes for conveying the induced current, or of
the shape of the arms or blades, may be made.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
€
:
In a mixing vessel the combinations of a rotating disc with fixed conducting pipe
or pipes for directing the induced currents as and for the purpose substantially as 5
described and shown.
7401 IIQTY TO LO TETTEL SIGANT
SAML. H. JOHNSON.
C. C. HUTCHINSON..
SAML. H. JOHNSON.
C. C. HUTCHINSON.