Improvements in Pumps for Hydraulic Tests, applicable also for other purposes.
Year: 1896

page_text: being date of first Foreign Application (in (30th June, 1896
France),
Date of Application (in United Kingdom), 18th Dec., 1896
Complete Specification Left, 18th Dec., 1896--Accepted, 20th Feb., 1897
Date of Application (in United Kingdom), 18th Dec., 1896
Complete Specification Left, 18th Dec., 1896--Accepted, 20th Feb., 1897
COMPLETE SPECIFICATION.
COMPLETE SPECIFICATION.
Improvements in Pumps for Hydraulic Tests, applicable also for
other purposes.
We, LA SOCIÉTÉ ZIEGLER FRERES of 3 and 5 Rue du Petit Jardin Dunkirk
in the Republic of France, Engine Builders, 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 :-
The pump which forms the object of the present application is capable of
general application, but it is more particularly designed with a view to the tests
of resistance to which certain vessels, pipes or the like, which are intended to
resist pressure, are subjected. During such tests by hydraulic pressure made
with apparatus giving an intermittent flow, a series of successive shocks are
produced, very prejudicial to the joints, connections, and rivettings of the vessels
subjected to the tests.
Our invention has for its object to remedy this inconvenience by employing a
pump having a constant delivery and a regularly progressive action.
This pump is shown in the accompanying drawing, in which,
Figure shows a front elevation; and,
Figure 2 a transverse vertical section passing through the axis of one of
the pumps.
The invention consists in forming a pump with three vertical cylinders A, B, C,
resting on a crossbar or base plate D which receives all the strains. This base
plate carries, in addition, columns F G which support the bearings of a crank
shaft H, and it is holted to the sides of a tank E of sheet or cast metal in which
the water for feeding the pump is poured.
The three plungers, mounted in the chambers A, B, C of the pump, receive their
movement from the crank shaft H, the three cranks of which are arranged at an
angle of 120° to each other. Further, the discharge pipes of the cylinders open
into a common passage L. The result of this arrangement is that the action of
the apparatus is continuous, and the water issues by the pipe M regularly and
without shocks.
The pump is portable and does not require any fixing. It might be mounted on
wheels. It is operated by hand by means of two handles.
In order to render the suction valves I always accessible, their guides are placed
externally, which allows of the chambers of the pump being emptied of water in
winter, and also of any foreign matters which might obstruct them being cleared
away from their seats. In the same way, the delivery valves J may be easily
inspected by removing the screw plugs K arranged opposite them. The chambers

page_text: of the pump being placed under the level of the water contained in the tank E
feed themselves. A pressure gauge N indicates the pressure obtained at any
moment.
This three chambered pump is, as may be seen, very simple in construction,
manipulation and maintenance. By its constant supply and progressive action free
from shocks it is perfectly suited for the hydraulic tests to. which certain apparatus
such as boilers, reservoirs, pipes and the like intended to support a certain pressure
are subjected, as required by official regulations. It is evident that it may also be
employed for all the purposes of ordinary pumps.
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―
A pump having three chambers and a constant delivery as hereinbefore described
and combined, more particularly with a view to its application to hydraulic tests
in order to obtain during such tests a progressive increase of pressure without
:shocks.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.