Improvements in Pumps.
Year: 1895

page_text: Date of Application, 23rd May, 1895
Complete Specification Left, 22nd Feb., 1896-Accepted, 4th Apr., 1896
Improvements in Pumps.
We, JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOHN WALLACE
JAKEMAN of the Firm of Merryweather & Sons, Limited, Greenwich Road,
Greenwich, in the County of Kent, Engineers, do hereby declare the nature of
this invention to be as follows:-
Our invention relates to improvements in pumps, and bears special reference to
pumps used with steam fire engines. The object of the said improvements is to
facilitate access to the valves for examination or repair and the reduction of
clearance or air space.
One method of carrying out our invention is as follows:-A conical chamber is
bored in the pump casting at right angles to the barrel of the pump above or below
it, communicating with the barrel and with the suction and delivery passages.
A conical plug is fitted into the bored chamber and the plug is constructed to
contain the suction and delivery valves. A passage in the centre of one side of the
plug communicates with the pump barrel and the suction and delivery valves are
carried upon suitable faces on two other sides of the plug. The plug is retained in
position by a cover and nuts which are removed and the plug withdrawn for
examination of the valves.
In some cases we place the bored chambers parallel to the pump barrel and
the whole of the valves may be contained in one plug, or two or
be used.
Deted thie 2nd day of May 1895
mole may
J. C. MERRY WEATHER.
C. J. W. JAKEMAN.
We, JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOHN WALLACE
JAKEMAN of the Firm of Merryweather & Sons Limited, Greenwich Road,
Greenwich in the County of Kent, Engineers, 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 :-
Our invention relates to improvements in pumps and bears special reference to
pumps used with steam fire engines. The object of the said improvements is to
facilitate access to the valves for examination or repair, and the reduction of
clearance or air space.
One method of carrying out our invention is as follows:-A conical chamber is
bored in the pump casting at right angles to the barrel of the pump above or below
it, communicating with the barrel and with the suction and delivery passages.
A conical plug is fitted into the bored chamber and the plug is constructed to
contain the suction and delivery valves. A passage in the centre of one side of the
plug communicates with the pump barrel, and the suction and delivery valves are
carried on suitable faces on two other sides of the plug. The plug is retained in

page_text: position by a cover and nuts which are removed and the plug withdrawn for
examination of the valves.
In some cases we place the bored chamber parallel to the pump barrel and
the whole of the valves may be contained in one plug, or two or more may
be used.
The accompanying sheets of drawings represent one method of carrying out our
invention,―
On Sheet 1, Figure 1 is a section taken transversely through the valve chamber
and longitudinally through the pump barrel.
Figure 2 is an outside view of the pump shewing the suction inlet and the covers
on the ends of the valve chambers.
Sheet 2, Figure 3 shews a section taken longitudinally through the valve chamber
and transversely through the pump barrel; one half being taken through the centre
of the pump barrel and the other half through the centre of the valve box.
The same letters indicate the same parts on each view. In Figure 1, Plate 1,
A represents the pump barrel, B the suction chamber, and C. C₁ represent
removable valve chambers containing the suction valves D & D and the delivery
valves E & E¹ & E'. F & F' on Figure 2 are covers which are removed in order
to withdraw the conical valve chambers containing the valves.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is,―
The arrangement of valves in the valve box easily withdrawn from the body of
the pump in the manner and for the purpose described.
Dated this 21st day of February 1896.
J. C. MERRY WEATHER.
C. J. W. JAKEMAN.