Year: 1887

page_text: Date of Application, 3rd Sept., 1887
Complete Left, 4th June, 1888
Complete Accepted, 6th July, 1888
We JAMES TANGIE of Aviary Cottage near Redruth in the County of Cornwall
Engineer and RICHARD JOHN CONNOCK of Carn View near Redruth in the County
of Cornwall Merchant do hereby declare the nature of this Invention to be as
follows:-
Our Invention has for its main object to simplify and improve the condensing
apparatus of steam pumping engines.
In order to secure speed and freedom in the working of an engine it is desirable to
maintain as good a vacuum as possible in the condenser. We effect this according to
our Invention by employing a vessel which may be of a capacity say about equal
to one half the capacity of the steam cylinder but it may vary according to the steam
pressure employed. The lower end of this vessel is open and the upper end plate has
perforations in it in which are fixed the extremities of tubes hanging downwards in
and reaching nearly to the bottom of the said vessel. This vessel we place on the
suction pipe of the pump and we lead the oxhaust steam pipe into the side near the
top of the said vessel.
When the apparatus is in action the an in the vessel becomes expanded to an
extent corresponding to the resistance of the column of liquid in the suction pipe any
uncondeusible vapour entering with the steam escaping through the open tubes at the
bottom with the water as it flows up through them to supply the pump; the steam
being instantly condensed on the cold surfaces of the tubes a vacuum more or less
perfect according to the height and resistance of the suction column is constantly
maintained without valves or moving gear of
any kind.
In some cases, especially where the area of the steam cylinder largely exceeds that
of the pump it may be advantageous to increase the height of the suction column by
forming it into a syphon or to increase the resistance to the inflow by slightly
contracting the area of the pipe. Wo may modify the apparatus so as to dispense
with tubes in which case we employ a vessel as hereinbefore de cribed the top plate of
which is perforated with small holes preferably of such size and number that the sum

page_text: of the passages they afford is about equal to the passage through the suction pipe of
the pump. This vessel is placed on the suction pipe of the pump preferably in such
position that the liquid pumped shall enter at the top and flow down through the
perforations.
When in action the air in the condensing vessel becomes expanded as before
described to an extent corresponding to the resistance in the suction column,
which resistance where desirable may be modified in the manner hereinbefore
described.
Dated 11: 91
T
1007

page_text: COMPLETE SPECIFICATION.
Improvements in Condensers of Steam Pumping Engines.
We JAMES TANGYE of Aviary Cottage near Redruth in the County of Cornwall
Engineer and RICHARD JOHN CONNOCK of Carn View near Redruth in the County of
Cornwall Merchant 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 :-
Our Invention has for its object to simplify and improve the condensing apparatus
of Steam pumping Engines.
In order to secure speed and freedom in the working of steam pumping engines it
is desirable to obtain as good a vacuum as possible in the condenser. We effect this
according to our invention by employing a vessel which may be of a capacity of say
about equal to one half the capacity of the steam cylinder but it may vary according
to the steam pressure employed the said vessel being situated in the suction column or
in such position that the liquid being pumped passes through it, the steam to be
condensed being admitted into the said vessel.
The accompanying drawing represents apparatus made according to our invention.
Figure 1 being a vertical section and Figure a half plan with the top removed of an
apparatus with tubes and Figures 3 and 4 being similar views of an apparatus without
tubes.
A Figures 1 and 2 is the aforesaid vessel open at both ends to the main through
which the liquid being pumped passes.
At the upper part of the vessel A is supported a plate C having perforations in it,
in which are fixed the extremities of tubes B hanging downwards in and reaching
nearly to the bottom of the said vessel. The said vessel is placed in the suction pipe
of the pump at as high a point as possible and we lead the exhaust steam pipe into the
side near the top of the said vessel as at D. S is the end with which the suction
pipe communicates.
When the apparatus is in action the air in the vessel A becomes expanded to an
extent corresponding to the resistance of the column of liquid in the suction pipe any
uncondensible vapour entering with the steam escaping with the water of condensation
through the open tubes at the bottom with the vapour as it flows up through them to
the pump, the steam being instantly condensed on the cold surfaces of the tubes, a
vacuum more or less perfect according to the height and resistance of the suction
column is constantly maintained without valves or moving gear of any kind.
In some cases especially where the area of the steam cylinder largely exceeds that
of the pump it may be advantageous to increase the height of the suction column by
forming it into a syphon or to increase the resistance to the inflow by slightly
contracting the area of the pipe.
We may modify the apparatus so as to dispense with tubes in which case we
employ a vessel A as herein before described and shewn in Figures and 4 the top
plate (in which, is perforated with small holes P preferably of such size and number

page_text: that the sum of the passages they afford is about equal to the passage through the
suction pipe of the
pump.
This vessel A is placed on the suction pipe of the pump preferably in such a
position as at S that the liquid pumped shall enter at the top and flow down through
the perforations P. The exhaust steam is let in through the opening D immediately
under the perforated plate C.
When in action the air in the condensing vessel becomes expanded as before
described to an extent corresponding to the resistance in the suction column which
resistance where desirable may be modified in the manner hereinbefore described.
In most cases we prefer to have a foot valve at the bottom of the suction pipe.
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
First. A valveless condenser for steam pumping engines substantially as herein
before described.
Second. A condenser for steam pumping engines consisting of tubes B forming
liquid passages in a chamber A into which the exhaust steam is introduced sub-
stantially as herein before described and illustrated in Figures 1 and 2 of the
accompanying drawings.
Third. A condenser for steam pumping engines consisting of a chamber A with a
perforated plate C for the passage of the liquid and an inlet for exhaust steam
substantially as hereinbefore described and illustrated in Figures 3 and 4 of the
accompanying drawings.