IMPROVEMENTS IN CONDENSERS FOR STEAM PUMPING ENGINES
Year: 1874

page_text: LETTERS PATENT to Henry Cherry, of Handsworth, in the County of
Stafford, Mechanical Engineer, for the Invention of "IMPROVEMENTS
IN CONDENSERS FOR STEAM PUMPING ENGINES."
PROVISIONAL SPECIFICATION left by the said Henry Cherry at the
Office of the Commissioners of Patents, with his Petition, on the
4th May 1874.
I, HENRY CHERRY, of Handsworth, in the County of Stafford,
Mechanical Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN CONDENSERS FOR STEAM PUMPING ENGINES," to be as
follows:-
I construct a vessel into the upper part of which the suction water of
the pump flows through a valve adjustable by hand, or opened and
closed by some part of the engine; or the said valve may be pressed to
its seat by a spring, the tension of which is adjustable. Into the upper
part of this vessel the exhaust steam also flows. The lower part of the

page_text: said vessel is furnished with a valve opening into a chamber, the lower
part of which.communicates with the suction inlet of the pump. The
effect of this arrangement is that the exhaust steam alternately forces
the water and air from the aforesaid vessel into the aforesaid chamber
(from whence they are drawn by the pump), and is condensed by the
water entering through the valve in the upper part of the said vessel..
I prefer to combine these improvements with the condenser described
in the Provisional Specification filed by me in the Great Seal Patent
Office on the 31st day of January 1874, No. 404, in which case I form a
communication between the upper chamber of the aforesaid condenser
and the upper part of the aforesaid vessel by means of a valve, as
herein-before described, and the lower part of the aforesaid condenser
forms the chamber herein-before described, into which the condensing
water, condensed steam, and air are forced from the aforesaid vessel by
the blast of the exhaust steam, the residuum of which is condensed by
the water entering through the valve in the upper part of the aforesaid
vessel.
The passage of the water into the aforesaid vessel may also be con-
trolled by the loaded valve described in the Provisional Specification
herein-before referred to.
In constructing the condenser according to the aforesaid Provisional
Specification I partition off a portion of the chamber, into which the
water passes through the loaded valve to form an air space, which has
the effect of steadying the vacuum.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said Henry Cherry in the Great Seal Patent Office
on the 29th October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
CHERRY, of Handsworth, in the County of Stafford, Mechanical Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her.
Letters Patent, bearing date the Fourth day of May, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
3

page_text: seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Henry Cherry, Her special license
that I, the said Henry Cherry, my executors, administrators, and
assigns, or such others as I, the said Henry Cherry, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
CONDENSERS FOR STEAM PUMPING ENGINES," upon the condition (amongst
others) that I, the said Henry Cherry, my executors or administrators,
by an instrument in writing, under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Henry Cherry, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
I construct a vessel into the upper part of which the suction water of
the pump flows through a valve adjustable by hand, or opened and
closed by some part of the engine; or the said valve may be pressed to
its seat by a spring, the tension of which is adjustable. Into the upper
part of this vessel the exhaust steam also flows. The lower part of the
said vessel is furnished with a valve opening into a chamber, the lower
part of which communicates with the suction inlet of the pump. The
effect of this arrangement is that the exhaust steam alternately forces
the water and air from the aforesaid vessel into the aforesaid chamber
(from whence they are drawn by the pump), and is condensed by the
water entering through the valve in the upper part of the said vessel.
I prefer to combine these improvements with the condenser described
and represented in the Specification of Letters Patent granted to me on
the 31st day of January 1874, No. 404, in which case I form a com-
munication between the upper chamber of the aforesaid condenser
and the upper part of the aforesaid vessel by means of a valve, as

page_text: herein-before described, and the lower part of the aforesaid condenser
forms the chamber herein-before described, into which the condensing
water, condensed steam, and air are forced from the aforesaid vessel by
the blast of the exhaust steam, the residuum of which is condensed by
the water entering through the valve in the upper part of the aforesaid i
vessel.
The passage of the water into the aforesaid vessel may also be con-
trolled by the loaded valve described in the Specification of the Patent
herein-before referred to.
In constructing the condenser according to the aforesaid Patent I:
partition off a portion of the chamber, into which the water passes
through the loaded valve to form an air space, which has the effect of
steadying the vacuum.
Having explained the nature of my Invention I will proceed to
describe with reference to the accompanying Drawings the manner in
which the same is to be performed.
Figure 1 represents in section a condenser of a steam pumping engine
constructed according to my Invention.
A is a vessel into the upper part of which the suction water of the
pump enters by the passage A², the said suction water passing through
the valve B adjusted by the hand wheel B²; or the said valve B may be
opened and closed by some part of the pumping engine or be pressed
to its seat by a spring, the tension of which may be adjusted. In the
upper part of the said vessel A the exhaust steam also enters by the
passage A³. The bottom of the said vessel A is in communication with
a chamber D, and the said chamber D is in communication by the
passage D with the suction inlet of the pump. Between the lower
part of the vessel A and the chamber D is a valve C adjusted by the
hand wheel C2 and pressed to its seat by the spring C³.
By the arrangement of parts described the exhaust steam entering
by the passage A³ alternately forces the water and air from the vessel A.
into the chamber D, from whence they are drawn through the passage D³
by the pump, the said exhaust steam entering at A³ being condensed by
the water entering the vessel A through the passage A².
Figure 2 represents in section and Figure 3 in plan the improvements
represented in Figure 1. combined with the condenser described in the

page_text: Specification of Letters Patent granted to me on the 31st day of
January 1874, No: 404. In the said Figures 2 and 3 A is the vessel,
into the upper part of which the exhaust steam enters at A³, and c, c, is
the chamber at the top of the condenser, into which the water from the
pump enters by the passage c³. D is the chamber below the vessel c,
into which chamber D the condensing water, condensed steam, and air
are forced; D² is a passage in the chamber D, through which the water
and air conveyed to the chamber D are drawn by the pump; C is the
valve between the bottom of the vessel A and chamber D. Between the
upper chamber c, c, of the condenser and the upper part of the vessel A
is a small passage b opened and closed by the valve B adjusted by the
hand wheel B2, and between the upper and lower chambers c; D is a
loaded valve a of the construction described in the Specification of the
Patent herein-before referred to, the said loaded valve a controlling the
passage of the water from the vessel c to the vessel D.
The action of this condenser is as follows:-The condensing water
enters the upper chamber cat c², and the greater part thereof passes
through the loaded valve a into the lower chamber D. A portion of the
condensing water entering the chamber c, c, passes through the valve B
into the upper part of the vessel A, by means of which said condensing
water the exhaust steam entering the said vessel A at A³ is condensed
and the condensing water, condensed steam, and air are carried through
the valve C into the lower chamber D and are drawn by the pump from
the said chamber D through the passage D².
Figure 4 represents in section a condenser constructed according to
the Patent herein-before referred to, but provided with an air space for
steadying the vacuum according to one of my present improvements.
In this condenser the lower part of it is divided by the partition 6° into
two chambers b, 62. Into the central chamber the water from the
upper chamber c passes through the loaded valve a, the outer chamber 6*
constituting an air space for steadying the vacuum. The exhaust steam
enters the lower part of the condenser by the valve e.
Having now described the nature of my Invention and the manner in
which the same is to be performed, I wish it to be understood that I
claim,―
First. The construction and combination of the parts of the condensers
of steam pumping engines, herein-before described and illustrated in
Figure 1 of the accompanying Drawings.

page_text: 是
Secondly. The construction and combination of the parts of the con-
densers of steam pumping engines, herein-before described and illustrated
in Figures 2 and 3 of the accompanying Drawings.
Thirdly. The addition to condensers of the kind patented by me on
the 31st January 1874, of an air space for steadying the vacuum, as
herein-before described and illustrated in Figure 4 of the accompanying.
Drawings.
In witness whereof, I, the said Henry Cherry, have hereunto set
my hand and seal, this Twenty-eighth day of October, in the year
of our Lord One thousand eight hundred and seventy-four.
Witness,
W. WILLIS, Jnr.,
Soho,
Birmingham.
HENRY CHERRY. (L.S.)