Improvements in Evaporating Apparatus for Concentrating Liquids of a Pulpy Nature.
Year: 1891

page_text: Date of Application, 7th May, 1891
Complete Specification Left, 16th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Evaporating Apparatus for Concentrating Liquids
of a Pulpy Nature.
A communication from abroad by WIRTH & Co. of No. 42, Hermannstrasse,
Frankfort-on-the-Main, in the Empire of Germany, Patent Agents.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323, High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
In a trough-shaped or other suitably formed receptacle, which contains the
pulpy matter, a hollow axle rotates, which is provided, along its entire length
inside the receptacle, with hollow fan-shaped stirrers, and, in fact, two stirrers
always face one another, so that they may be secured by one screw bolt passing
through them. The steam employed for heating enters at one end of the
apparatus, traverses the hollow shaft and the hollow stirrers, and the water
condensed therefrom runs off through a pipe at the other end of the apparatus.
The stirrers with their sockets project almost to the middle of the axle, so that
the water of condensation running in the lower hollow part of the axle cannot
penetrate into the stirrers.
In order that the water of condensation formed in the heating stirrers shall not,
on the revolution of the axle, be able to drop into the stirrers lying opposite to
them, small movable plates are arranged between the sockets of the stirrers, which
project into the hollow part of the shaft, which plates slide on the screw spindle
which secures the two stirrers, and like valves rest on the openings of those stirrers
which, at the time, are the lower ones.
The revolution of the axle is effected by means of belt pulleys or wheels.
On each revolution of the axle, the stirrers discharge the water of condensation,
formed in their interior, into the hollow space of the axle, so that the heating
surfaces are kept as free as possible from the water of condensation and therefore
transmit the heat better. Further, the whole stirring apparatus produces an
excellent circulation of the pulpy matter which is to be concentrated, whereby a
thorough evaporation is guaranteed.
Through the peculiar fan-shape of the heating stirrers, the heating surfaces of
which lie in the plane of rotation, the caking of the pulpy matter on the heating
surfaces is avoided, because, in consequence of the repeated friction between the
matter and heating surfaces, absolutely no particles of the matter can remain
adhering to the stirrers.
The whole apparatus is somewhat inclined towards the end, so that the water of
condensation in the hollow shaft may run away more quickly.
Dated this 6th day of May 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Evaporating Apparatus for Concentrating Liquids
of a Pulpy Nature.
A communication from abroad by WIRTH & Co., of No. 42, Hermannstrasse,
Frankfort-on-the-Main, in the Empire of Germany, Patent Agents.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool & 6, Bank Street,
Manchester both in the County of Lancaster & 323 High Holborn in the
County of Middlesex, Civil Engineer, 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 :-
Referring to the accompanying sheet of drawings, and to the figures and letters
of reference marked thereon, similar letters indicating like parts in each of the
figures
Figure 1 is a longitudinal section of the apparatus.
Figure 2 is a sectional end elevation on line x-x of Figure 1.
Figure 3 is an enlarged view of the stirrers showing the method of attaching
same to the axle.
In a trough-shaped or other suitably formed receptacle A, which contains the
pulpy matter, a hollow axle B B rotates, which is provided, along its entire length
inside the receptacle, with hollow fan-shaped stirrers C, and, in fact, two stirrers
always face one another, so that they may be secured by one screw bolt D passing
through them. The steam employed for heating enters at one end B of the
apparatus, through the connecting pipe E traverses the hollow shaft and the hollow
stirrers, and the water condensed therefrom runs off through a pipe F at the other
end of the apparatus. The steam supply pipe can be connected to the revoluble
heating apparatus in any suitable and desired manner, for instance the steam supply
pipe could have a flange at its end which could be applied against the external
Hange of the pipe E and the two flanges be bolted together with interposed packing
ring. The stirrers C with their sockets project almost to the middle of the axle, as
seen clearly in Figure 3, so that the water of condensation running in the lower
hollow part of the axle cannot penetrate into the stirrers.
In order that the water of condensation formed in the heating stirrers C shall
not, on the revolution of the axle, be able to drop into the stirrers lying opposite to
them, small movable plates G are arranged between the sockets of the stirrers,
which project into the hollow part of the shaft, which plates slide on the screw
spindle which secures the two stirrers, and like valves rest on the openings of those
stirrers which, at the time, are the lower ones.
The revolution of the axle is effected by means of belt pulleys or wheels H.
On each revolution of the axle, the stirrers discharge the water of condensation,
formed in their interior, into the hollow space of the axle, so that the heating
surfaces are kept as free as possible from the water of condensation and therefore
transmit the heat better. Further, the whole stirring apparatus produces an
excellent circulation of the pulpy matter which is to be concentrated, whereby a
thorough evaporation is guaranteed.
Through the peculiar fan shape of the heating stirrers, the heating surfaces of
which lie in the plane of rotation, the caking of the pulpy matter on the heating
surfaces is avoided, because, in consequence of the repeated friction between the
matter and heating surfaces, absolutely no particles of the matter can remain
adhering to the stirrers.
The whole apparatus is somewhat inclined towards the end, so that the water of
condensation in the hollow shaft may run away more quickly.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is
:-
In an evaporating apparatus for concentrating liquids of a pulpy nature, the
employment of fan shaped hollow tube stirrers C arranged in pairs at right angles
and secured substantially as described and shown, the hollow necks of the stirrers,
which bear against suitable seatings on and penetrate into the axle of the
apparatus, having interposed between them sinall movable plates G in the manner
and for the purpose described, the whole substantially as herein before described
and shown.
בד
1L 1 of 1901
WM. P. THOMPSON & Co.,
Agents for the Applicant.