Year: 1887

page_text: Date of Application, 24th Aug., 1887
Complete Left, 23rd June, 1888
Complete Accepted, 27th July, 1888
I PHILIP ELIOT HODGKIN of 63 Queen Victoria Street in the City of London
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in pumps of that class in which the water or
other liquid is ejected by the direct action of steam thereon without the intervention of
a piston or similar contrivance.
Une part of the present Invention has especial reference to pumps of this class
constructed according to the type of a former Invention in respect of which Letters
patent were granted to Ernst Heinrich Greeven, dated the 27th April 1882 No. 1988,
and it consists in constructing the valve which works against the seat or mouth of the
steam inlet with a stud or projection which enters the centre of such seat or steam
orifice leaving a space around it for the passage of the steam. This stud or projection
has the effect, when the valve is away from the seat or steam orifice, of more perfectly
directing or distributing the steam along the inner part of the casing and otherwise
contributing to the efficient working of the apparatus.
Another part of the Invention which has reference to all pumps of the class mentioned
in the 1st clause of this my specification, consists in the use of a tube or nozzle (either
in one casting with the body of the pump or consisting of a separate piece) below the
steam valve at the mouth of the working chamber for the purpose of directing the
steam as it comes from the valve on to the surface of the water in the working
chamber.
Dated this 02nd day of Auenst 1887
THOS. J. HANDFORD,
50, Bedford Row, London, W.C.,
Agent.

page_text: I PHILIP ELIOT HODGKIN, of 63, Queen Victoria Street, in the City of London,
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 stateinent:—
My Invention relates to improvements in pumps of that class in which the water or
other liquid is ejected from a chamber by the direct pressure upon its surface of steam,
which is afterwards condensed forming a partial vacuum in the same chamber, into
which the water or other liquid from the suction pipe rises, to be again in turn ejected,
and so on, alternately, as long as the pump remains in action.
One part of my Invention has especial reference to pumps of this class constructed
according to the type of a former invention, in respect of which Letters patent were
granted to Ernst Heinrich Greeven, dated the 27th April 1882, No. 1988, and it
consists in constructing the valve, which works against the seat or mouth of the steam
inlet, with a stud or projection, which enters the centre of such mouth, leaving a space
around it for the passage of the steam. This stud or projection has the effect, when
the valve is away from the seat or mouth of the steam inlet, of more perfectly directing
or distributing the steam along the inner part of the casing and otherwise contributing
to the efficient working of the apparatus.
Another part of my Invention has reference to all pumps of the class in which the
water or other liquid is ejected from a chamber by the direct pressure upon its surface
of steam, which is afterwards condensed forming a partial vacuum in the same
chamber, into which the water or other liquid from the suction pipe rises. This part
of the Invention consists in the use of a converging tube or nozzle, or its equivalent
(either in one casting with the body of the pump or consisting of a separate piece but
in either case with a converging bore or conduit) below the steam valve at the mouth
of the working chamber, for the purpose of concentrating or directing the steam as
it comes from the valve, on to the surface of the water or other liquid in the working
chamber.
And in order that the said Invention may be perfectly understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to the
several figures on the accompanying sheets of drawings, the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 of my drawings represents a vertical section of the upper part of a pump
of the class herein before referred to, constructed according to the type of the said
former Invention in respect of which Letters Patent were granted to Ernst Heinrich
Greeven No. 1988 A.D. 1882 as aforesaid. Figures 2, 3 and 4 are similar views of
pumps of the class and type herein before referred to illustrating my improvements.
In the example indicated in Figure 1 of a known pump of the class and type
hereinbefore referred to, the steam inlet a of the pump has arranged beneath it a
valve C, consisting of a movable part c working against the seat or mouth at 6 of such

page_text: steam inlet, and of a fixed part c¹ guiding the motion of the movable part c, small
holes, being provided for the admission and escape of steam to and from the
underside of the said movable part c. By the variation of pressure above and below
the said movable part c the latter is caused to alternately move away from its seat at b
for the admission of steam to the chamber e, and to close against its seat at b
and shut off the supply of steam. The delivery or ejection of the liquid from the
chamber e and the suction of fresh liquid into such chamber, thus take place by the
alternate pressure and condensation of the steam in an automatic manner.
According to one part of my Invention, the movable part c of the valve C is
constructed with a stud or projection (Figure 2) which enters the centre of the
orifice or mouth of the steam inlet a, leaving a space around it for the passage of
the steam. By means of this stud or projection g, when the part c of the valve is in the
position shewn in Figure 4, that is to say, away from the seat or mouth of the steam
inlet a, the steam is more perfectly directed or distributed along the paris 1, 2, of the
casing of the valve box a' and the efficient working of the apparatus is more completely
ensured.
Another part of my Invention, which is illustrated by three several modifications in
Figures 2, 3 and 4 respectively of the drawings, although for convenience shewn
applied to a pump fitted with a valve of the type hereinbefore described, yet it is
applicable to all pumps of the class in which the water or other liquid is ejected from
a chamber by the direct pressure upon its surface of steam, which is afterwards
condensed forming a partial vacuum in the same chamber, into which the water or
other liquid from the suction pipe rises. This part of the Invention consists in the use
of a converging tube or nozzle, or its equivalent, h, either formed separate from the
body el of the pump as indicated in Figures 2 and 3 or cast or formed in one piece
with the same as shown in Figure 4, in which latter case its interior ', still made of a
converging shape, forms a prolongation of the hole e in the body e¹ of the pump. It
is situate below the steam valve (whether such valve be of the type shewn at C in my
drawings or of any other description) at the mouth of the working chamber e, and has
the effect of concentrating the steam as it comes from the valve and directing it on to
the surface of the liquid in the working chamber, instead of allowing it to follow the
sides 3-4 of the chamber (Figure 1) and thus act in a less advantageous manner upon
the liquid.
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. In pumps of the type described in patent-specification No. 1988 A.D. 1882,
constructing the steam valve with a stud or projection, which enters the mouth of the
steam inlet, leaving a space around it for the passage of the steam, substantially as and
for the purposes herein before described.
2. In pumps of that class in which the water or other liquid is ejected from a
chamber, by the direct pressure upon its surface of steam, which is afterwards
condensed forming a partial vacuum in the same chamber, into which the water or
other liquid from the suction pipe rises; the employment of a converging tube or
ozzle, or its equivalent as set forth, for the purpose of concentrating the steam as it
comes from the steam valve and directing it on to the surface of the liquid in the said
chamber, substantially as hereinbefore described.
Dated this 22nd day of Tune 1000
THOS. J. HANDFORD,
50, Bedford Row, London, W.C.,
Agent.