Improvements in Steam Pumps.
Year: 1890

page_text: Date of Application, 1st July, 1890
Complete Specification Left, 21st Mar., 1891-Accepted, 2nd May, 1891
PROVISIONAL DI ECIFICATION.
Improvements in Steam Pumps.
I, JOHN SMITH RAWORTH, of 112 Belvedere Road, Lambeth, in the County
of Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention has reference to certain improvements in combined steam engines
and pumps of the kind in which one piston rod is common to one pump barrel and
one steam cylinder.
My invention is applicable to ordinary steam pumps for lifting and forcing
liquids, for compressing air or gases, and more particularly to independent air
pumps or air and circulating pumps (for use with steam condensers), with which I
also combine feed pumps.
In carrying my invention into effect I use two pumps placed side by side, each
plunger or piston being driven by a steam piston fixed on the other end of the
piston rod.
The two pumps are connected by a crank shaft with the cranks set by preference
at right angles to each other. In the case of a horizontal pump, the crank shaft is
placed above the piston rods, and is driven from a cross head on each piston rod
through a link or links and a connecting rod and bell crank, the centre or gudgeon
of which is fixed below the piston rod.
In double acting pumps for liquids requiring gun-metal barrels, I fix the gun-
metal liner in a central diaphragm (as usual) and hold it in position by two or more
long bolts which pass through a flange or lugs on the gun-metal liner near the
centre of its length, through holes in the diaphragm, and then through the front or
back wall of the pump chamber, the tightening nuts being screwed up outside.
By this construction the liner can be readily withdrawn for examination or
repair and a new liner may be easily fixed when required.
In constructing air pumps, or air and circulating pumps, I follow the general
method of construction as described above and in the latter instance I use one
barrel for the air pump and the other for the circulating pump..
In some cases I combine one or more feed pumps with the air pump, or with the
air and circulating pump and driven by preference from an arm or lever on one or
both of the bell crank gudgeons, and I make the stroke of the feed pump adjust-
able by a hand screw by which the working length of the said arm or lever may
be varied to suit the requirements of the boilers.
The water from the air pump is delivered from the valve chamber into a hot well
placed below the air pump and about on the same level as the feed pump.
Dated this 1st day of July 1890.
W. LLOYD WISE,
Per F. J. Brougham.
COMPLETE SPECIFICATION.
Improvements in Steam Pumps.
I, JOHN SMITH RAWORTH, of 112 Belvedere Road, Lambeth, in the County
of Surrey, 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 statement:-
My invention has reference to certain improvements in combined steam engines
and pumps of the kind in which one piston rod is common to one pump barrel and
one steam cylinder.

page_text: My invention is applicable to ordinary steam pumps for lifting and forcing
liquids, for compressing air or gases, and more particularly to independent air
pumps, or air and circulating pumps (for use with steam condensers), with which I
also combine feed pumps.
In carrying my invention into effect I use two pumps placed side by side, each
plunger or piston being driven by a steam piston fixed on the other end of the
piston rod.
The two pumps are connected by a crank shaft with the cranks set by preference
at right angles to each other. In the case of a horizontal pump, the crank shaft is
placed above the piston rods, and is driven from a cross head on each piston rod
through a link or links and a connecting rod and bell crank, the centre or gudgeon
of which is fixed below the piston rods.
In double acting pumps for liquids requiring gun-metal barrels, I fix the gun-
metal liner in a central diaphragm (as usual) and hold it in position by two or
more long bolts which pass through a flange or lugs on the gun-metal liner near the
centre of its length, through holes in the diaphragm and then through the front or
back wall of the pump chamber, the tightening nuts being screwed up outside.
By this construction the liner can be readily withdrawn for examination or repair
and a new liner may be easily fixed when required.
In constructing air pumps, or air and circulating pumps, I follow the general
method of construction as described above and in the latter instance I use one
barrel for the air pump and the other for the circulating pump.
In some cases I combine one or more feed pumps with the air pump, or with the air
and circulating pump and driven by preference from an arm or lever on one or both
of the bell crank gudgeons, and I make the stroke of the feed pump adjustable by
a hand screw by which the working length of the said arm or lever may be varied
to suit the requirements of the boilers.
The water from the air pump is delivered from the valve chamber into a hot well
placed below the air pump and about on the same level as the feed pump.
Referring to the accompanying drawings,
Fig. 1 is a side elevation partly in section and,
Fig. 2 a plan, also partly in section, of a steam pump constructed according to
this invention.
a is the high pressure steam cylinder; and 6 the low pressure steam cylinder; or
both cylinders may be supplied with high pressure steam if desired. c and d are
the two pumps actuated by the pump rods cd respectively which are continuations
of the piston rods a¹ and b¹. a² and 62 are the bell crank levers actuated respec-
tively by the links a³, 63. e is a gun-metal or other metallic liner constituting the
pump barrel; it is held in place on a diaphragm e' by long bolts which pass
through the front wall of the pump chamber.
The arrangement of feed pumps in combination with air and circulating pump is
shewn at G¹, G². 93, 9 are the adjustable levers, driven by the gudgeons a³, 3
respectively for actuating the feed pumps. k is the hot-well in the bedplate under
the pumps.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. The general arrangement of steam pump, with or without the addition of feed
pump substantially as described and shewn in the drawings.
2. The combination of an air and circulating pump with a feed pump driven by
an adjustable lever actuated by rocking shaft or gudgeon.
Di df Man 1001
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.