Improvements connected with Direct Acting Steam Pumping Engines.
Year: 1891

page_text: Date of Application; 24th Oct., 1891
Complete Specification Left, 25th July; 1892-Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements connected with Direct Acting Steam Pumping
Engines.
We, CHARLES THOMAS CROWDEN, of Vulcan Works, Northampton, Engineer,
and FREDERICK MARTEN HALE of 9 Moorfields, London, Secretary, do hereby
declare the nature of this invention to be as follows:-
This invention relates to direct acting steam pumping engines where a crank is
interposed between the steam and water cylinders for governing the stroke of the
engine and actuating the steam slide valves.
The steam piston has two rods, one led over, and one under the crank shaft.
The crank webs clearing the piston rods are connected to a crosshead having four
eyes, two of which are connected to the steam piston rods. Two stay rods are
fixed between the cylinder head and the pump head, passing over and under the
crank shaft (similar to the piston rods) two eyes of the crosshead work on these
stay rods which serve the double purpose of stay rods and guides with a return
connecting rod from the crosshead to the crank shaft. One pump piston rod is
led from the crosshead to the pump piston. The crank shaft is furnished with a
crank pin or eccentric for driving the slide valve which is (preferably) of the
rocking kind, known as the "Corliss," with an exhaust cavity.
The engine can be made single, double, treble, or quadruple, and can be easily
compounded by adding a high pressure cylinder at the back, and connecting it
with a piston rod and coupling the rocking slide valves with a coupling rod.
It is usual to make a brass pump to secure a brass seating for the valves, or
screw the brass seatings into a cast iron body. Instead of this arrangement, we
make a cast iron body pump with a nest of valves cast in a thin plate, which are
faced, pinned, and rivetted or otherwise secured over holes in the cast iron body,
thus saving a gun metal pump, or the possibility of the screwed seatings coming
out besides effecting a saving of the cost of manufacture.
Dated this 94th day of October 1891
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Charles Thomas Crowden and Frederick Marten Hale.
COMPLETE SPECIFICATION.
Improvements connected with Direct Acting Steam Pumping
Engines.
We, CHARLES THOMAS CROWDEN, of Vulcan Works, Northampton, Engineer,
and FREDERICK MARTEN HALE, of 9 Moorfields, London, Secretary, 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:-
This invention relates to direct acting steam pumping engines where a crank is
interposed between the steam and water cylinders for governing the stroke of the
engine and actuating the steam slide valves.
The invention will be understood by reference to the annexed drawings in
which
Figure 1 is a side elevation, Figure a plan, and Figure 3 a detached view of
the crosshead.
The steam piston has two rods one A led over and one B under the crank-
[Price 8d.]

page_text: shaft C. The crank webs D, D, clear the piston rods and are connected to a cross-
head E having four eyes, two of which are connected to the steam rods. Two
stay rods F, G, are fixed between the cylinder head H and the pump head I
passing over and under the crank shaft C (similar to the piston rods) two eyes of
the crosshead work on these stay rods F, G, which serve the double purpose of
stay rods and guides, with a return connecting rod J from the crosshead E to the
crank-shaft C. One pump piston rod K is led from the crosshead E to the pump
piston. The crankshaft is furnished with a crank pin or eccentric L for driving the
slide valve wbich is (preferably) of the rocking kind known as the "Corliss" with
an exhaust cavity.
The engine can be made single, or double as shown, or treble, or quadruple, and
can be easily compounded by adding a high pressure cylinder at the back, and
connecting it with a piston rod and coupling the rocking slide valves with a
coupling rod.
It is usual to make a brass pump to secure a brass seating for the valves, or
screw the brass seatings into a cast iron body. Instead of this arrangement, we
make a cast iron body pump to receive a nest of valve seatings cast in a thin
plate M as at Figures 4 and 5 fastened to it, which seatings are faced, the valves N
being pinned, and rivetted, or otherwise secured over holes P P in the cast iron
body, thus saving a gun metal pump, or the possibility of the screwed seatings:
coming out, besides effecting a saving in the cost of manufacture.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. Arranging a crosshead of a combined engine and pump with piston rods and
guide rods at opposite corners as described and shown.
2. Arranging the piston rods of a direct acting steam pumping engine diagonally
to each other and the guide rods at the other opposite corners, so that ou each side
from the crosshead, one of each rods appear respectively above and below the main
shaft as described and substantially as shown.
3. Fitting a nest of valves cast in a thin plate and securing same in a cast iron
pump body for the purpose specified.
4. Constructing a cast iron pump body with holes for reception of a nest of
valves to be secured thereto, as and for the purposes set forth.
The 25th day of July 1892.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Charles Thomas Crowden and Frederick Marten Hale.