IMPROVEMENTS IN PORTABLE STEAM ENGINES FOR PUMPING AND OTHER, PURPOSES
Year: 1884

page_text: 1, JOHN GWYNNE, of the firm of John and Henry Gwynne of the Hammersmith
Iron Works Hammersmith, in the County of Middlesex, Engineer, do hereby
declare the nature of said invention for "IMPROVEMENTS IN PORTABLE STEAM
ENGINES FOR PUMPING AND OTHER, PURPOSES" to be as follows :-
This invention has reference chiefly to the arrangement of the steam-engine
proper and a centrifugal pump with regard to the boiler which is of the locomotive
tubular type mounted on four travelling wheels with or without springs as may be
required. The front axle is placed as usual under the smoke box but the bind
axle is placed at the rear end of the fire-box, so as to support the weight of the
machinery more equally and also that the aft wheels may nearly clear the sides of
the fire-box so as to afford ready access to the Fire-door opening which is placed in
one side of the fire-box and provided with a sliding door in lieu of the usual
hinged arrangement.
The engine is placed on a platform projecting from the fire-box end of the boiler
and supported by wrought iron brackets which may be rivetted to the sides of the
fire-box or may be formed by projecting the side plates of the fire-box forming
them into the bracket shape and fixing the platform to these brackets by rivetting
or otherwise.
This platform carries the engine and sometimes the pump, as arranged, inde-
pendently of the boiler so that no trouble is given by unequal expansion or
contraction.
The engine proper is of the inverted cylinder steeple type and conveniently may
be constructed with a hollow segmental back frame and wrought iron stanchion to
support the cylinder in front, the frame is fixed to the platform at the base; a
slipper guide is used, and the crank shaft is carried in suitable bearings fixed
either on the platform; base of engine; or in the brackets, as may be arranged.
In some cases the engine proper and a centrifugal pump are fixed on the same
base plate with the axis of their common shaft running parallel with the longi-
tudinal axis of the boiler, this arrangement allows the pump to be placed well aft,
so that full advantage can be taken of the swivel construction described in the
specification of a former patent granted to me the 23rd day of July 1878 N° 2922.
D071

page_text: In other cases where it is wished to drive a centrifugal pump by means of a belt
the engine proper is still placed on a like supported platform at the rear of the
boiler but with the crank axis at right angles with the longitudinal axis of the
boiler and having the fly-wheel or driving drum projecting on one side so as to
clear the side of the fire-box. The pump in this case is carried on a bracket at the
smoke box end of the boiler or fixed to the centre of fore carriage and has its
driving shaft disposed parallel to the crank axle of the engine and its driving drum
projecting on one side of the boiler so as to be in a line with the drum on the
crank shaft, and be driven by a leather belt therefrom.
The arrangement of the bearings is such as to allow of swivelling the pump to a
sufficient extent for all practical purposes. In this latter arrangement the engine
can be used for various other
purposes.

page_text: I, JOHN GWYNNE of the firm of John and Henry Gwynne of the Hammersmith
Iron Works, Hammersmith in the County of Middlesex, Engineer, do hereby declare
the nature of my said invention for "IMPROVEMENTS IN PORTABLE STEAM ENGINES
FOR PUMPING AND OTHER PURPOSES" and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention has reference chiefly to the arrangement of the steam engine
proper and a centrifugal pump with regard to the boiler which is of the locomotive
tubular type mounted on four travelling wheels with or without springs as may be
required.
The front axle is placed as usual under the smoke box but the hind axle is
placed at the rear end of the fire box so as to support the weight of the machinery
more equally and also that the aft wheels may nearly clear the sides of the fire box
so as to afford ready access to the fire door opening which is placed in one side of
the fire box and provided with a sliding door in lieu of the usual hinged
arrangement.
The engine is placed on a platform projecting from the fire box end of the boiler
and supported by wrought iron brackets which may be rivetted to the sides of the
fire box or may be formed by projecting the side plates of the fire box, forming
them into the bracket shape and fixing the platform to these brackets by rivetting
or otherwise.
This platform carries the engine and sometimes the pump as arranged independently
of the boiler so that no trouble is given by unequal expansion or contraction.
The engine proper is of the inverted cylinder steeple type and conveniently may
be constructed with a hollow segmental back frame and wrought iron stanchion to
support the cylinder in front; the frame is fixed to the platform at the base.
A slipper guide is used, and the crank shaft is carried in suitable bearings fixed
either to the platform; base of engine; or in the brackets; as may be arranged:
In some cases, the engine proper and a centrifugal pump are fixed on the same
base plate with the axis of their common shaft running parallel with the longi-
tudinal axis of the boiler and this arrangement allows the pump to be placed well
aft so that full advantage can be taken of the swivel construction described in the
specification of a former patent granted to me the 23rd day of July 1878 N° 2922.
In other cases where it is wished to drive a centrifugal pump by means of a belt
the engine proper is still placed on a like supported platform at the rear of the
boiler but with the crank axis at right angles with the longitudinal axis of the
boiler and having the flywheel or driving drum projecting on one side so as to clear
the side of the fire-box. The pump in this case is carried on a bracket at the
smoke box end of the boiler or fixed to the centre of the fore carriage and has its
driving shaft disposed parallel to the crank axle of the engine and its driving drum,
projecting on one side of the boiler so as to be in a line with the drum on the
crank shaft and to be driven by a leather belt therefrom.
The arrangement of the bearings is such as to allow of swivelling the pump to a
sufficient extent for all practical purposes.
In this latter arrangement the engine can be used for various other purposes.
In the accompanying 4 sheets of illustrative drawings Fig 1 shews in side
elevation, the general arrangement of a portable pumping engine according to my
invention and Fig 2 is a plan or top view of the same. Fig 3 is an elevation
shewing the fire box end of the engine with its centrifugal pump. A is the boiler ;

page_text: B the fire box, b the sliding fire-box door, C the platform, and D. D are brackets
that support the same. The whole of these parts are supported on four travelling
wheels E. The engine proper F, as will be seen is of the inverted cylinder steeple
type, and in the example illustrated it is constructed with a hollow segmental back
frame F and a wrought iron stanchion G to support the cylinder H in front. The
frame of the engine
fixed to the platform at the base. I is the crank shaft
carried in suitable bearings which can be fixed either on the platform or on the
base of the engine, or on the brackets as may be arranged. K is the centrifugal
pump, it is fixed on the same base piece as the engine proper the axis of their
common shaft I running parallel with the longitudinal axis of the boiler. This
arrangement allows the pump to be placed well aft as and for the purpose herein-
before mentioned. Fig 4 sheet 2 illustrates in side elevation tho modified arrange-
ment adopted in those cases where it is desired to drive the centrifugal pump by
means of a belt. In this case the engine proper is still placed on a platform
supported at the rear of the boiler by brackets D, but with the axis of the crank.
shaft at right angles to the longitudinal axis of the boiler. M is the fly wheel or
driving drum fixed to the crank shaft and projecting beyond the adjacent bracket
so as to be clear of it. K is the centrifugal pump carried on a bracket at the smoke
box end of the boiler or it may be fixed to the centre of the fore carriage as herein-
before mentioned. In the example illustrated the pump is at the side of the smoke
box but it may be arranged in front of the smoke box. K' is the driving shaft of
the pump arranged parallel to the crank shaft of the engine and carrying a drum N
which projects on one side of the boiler so-as-to-be-in-a-line with the drum Mon
the crank shaft of the engine from which it is driven by a leather belt O.
In the arrangement illustrated in Figs 5 and 6 the crank shaft of the engine is
also the shaft of the centrifugal pump K which in this case is situate at the side of
the platform.
In each arrangement P is the steam exhaust pipe.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be perforined, I declare that wliat
I claim is:-
1. A portable engine comprising a horizontal boiler, a vertical motor and a
centrifugal pump, the casing of which is capable of being swivelled, substantially
as described.
2. The general arrangement of a portable steam engine for pumping and other
purposes comprising a horizontal boiler and fire box with the fire door at the side
and a vertical motor arranged on a platform or support at the rear of the fire box
whether the axis of the engine shaft and pump be parallel with the longitudinal
axis of the boiler as in Figs 1 to 3 or at right angles thereto as in Figs 4, 5, & 6.
3. The combination with a boiler mounted on wheels of an engine arranged upon
a platform fixed in rear of the boiler and a centrifugal pump mounted at the front
or smoke box end of the boiler and driven from the engine by a band or belt as
described with reference to and illustrated in Fig 4 of the drawings.
Datel 1
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