Improvement in Cocoa Urns.
Year: 1889

page_text: Date of Application, 8th Nov., 1889-Accepted, 8th Feb., 1890
COMPLETE SPECIFICATION.
Improvement in Cocoa Urns.
THOMAS HENRY RUSSELL Hot Water Fitter, etc., 31, Newcastle Street Strand
London W.C. 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 purpose of this invention is to keep pure cocoa-prepared in quantities—
thoroughly and permanently mixed, while its temperature is maintained by the use of
an ordinary hot water urn. The body of pure cocoa liquor is known to readily settle
at the bottom of the urn, although the greatest skill and care has been exercised in its
solution or mixing.
Figure 1, gives a sectional view of an ordinary cocoa or tea urn to which this
improvement is attached.
A represents the inner, round space of an earthenware vessel (jar), intended to hold
the cocoa liquor.
B indicates the circular space between the exterior of the earthenware jar and the
inner side of the copper urn or exterior mantle containing hot water.
C shows the position for an ordinary urn cover.
D is the filling spout for the water jacket or space described in B.
E is the tap from which the cocoa is drawn, and the cylindric, hollow tube of which
extends to the interior of the earthenware jar.
F represents a screw plug to the tap, intended for cleansing the passage of the
liquor.
G is the gas burner for heating the urn or for maintaining the high temperature of
the water in space B.
a (part of the invention) is a fan, which may either consist of two, four or six
wings, and is actuated by a simple motion of tap E. It is produced of pure tin,
which latter does not affect the quality of the cocoa, but can with equal advantage be
substituted with earthenware.
b, is a simple square bar passing through the central hole along the whole length
of the fan. Its pointed end turns in bearings c, while its other end, which is square,
fits somewhat loosely into the extreme end of spindle & shewn in Fig. 2.
C is the bearing fixed in the urn, and is intended for the support and free motion
of the fan.
d, is a spindle passing through a stuffing box g, from the interior of the earthenware
jar. The square end of the fan spindle drops or fits into a square cavity provided in
the centre of the spindle head, as shewn in Fig. 2 and Fig. 2b, and is commonly
called "notch."
A toothed mitre wheel his fixed at the outer, extreme end of this spindle, and on
the outward end of the stuffing box it bears a screw nut e, fitting into the stuffing
box, and which is intended for screwing up the stuffing, and thus preventing all
penetration of moisture. A second, narrow screw nut fadjoins the former, and this
atter nut fis fixed to the spindle by means of a small screw, and thus ensures the
egular action of the mechanism, while at the same time it steadies both the spindle
nd the forner nut e.
i represents a spindle which is simply joined with the ordinary tap spindle, and the
andle is joined at a convenient position as nearly as possible the same height as by
he ordinary urn tap. At the upper extreme end this spindle bears the fellow mitre
heel to the upper toothed mitre wheel h.
7, represents the lower toothed mitre wheel intended for effecting the motion of the
in directly through spindle d in opening the tap.

page_text: k, shows a triangular plate, fixed to the exterior of the urn, and is intended for
steadying spindle i.
All the parts thus added, which are in direct contact with the cocoa liquor, can be
produced in pure tin (which least affects the liquid) if desired, or can be made of
tinned gun metal, copper, cast iron, or similar material.
The notches in the fan spindle bearings are purposely made to enable a speedy
removal of the fan for daily cleaning.
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. That my invention is the only means at present available to keep prepared cocoa
liquid well mixed, and fit for consumption during any length of time necessary.
2. That this invention is of the simpliest imaginable nature.
3. That overy additional part can be removed and replaced without the slightest
difficulty and loss of time.
4. That this improvement can be affixed to any existing urn with comparatively
slight expense and trouble.
Dated this 7th day of Novambo 1000