Improvements in Pumping Apparatus, applicable for Dredging Purposes.
Year: 1894

page_text: Date of Application, 15th Dec., 1994
Complete Specification Left. 16th Sept., 1895-Accepted, 26th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Pumping Apparatus, applicable for Dredging
Purposes.
I, JOHN GWYNNE of Hammersmith Iron Works, Hammersmith in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
:
My invention has reference to pumping apparatus applicable for dredging
purposes though it may be otherwise applied.
It is usual to provide the mouth of the suction pipe with a grid or grating to
arrest matters that are too large to pass through the pump. Such grids or gratings
are liable to become more or less choked so that the pumps have to be stopped and
the obstruction removed. Now my invention is designed to obviate this disadvantage.
For this purpose in some convenient place between the mouth piece of the suction
pipe and the pump I provide a trap or arrester or traps or arresters with a receptacle..
or receptacles that can be inspected whilst the pumps are at work, that can be...
shut off from the suction pipe, and which is or are provided with a suitable door
or doors so that anything deposited therein can be readily removed whilst the pump
is at work. In cases where two traps or arresters with receptacles are employed,
the arrangement is such that when one trap or arrester and receptacle are in use
the same will be in communication with the pump and with the mouth of the
suction pipe, whereas the other trap or arrester and receptacle will be disconnected
from the mouth of the suction pipe. Such an arrangement may assume various
forms.
In one arrangement I provide a depositing receptacle that is provided with a
door and glazed sight hole and is in communication with the suction pipe by a
branch opening controlled by a valve or cover which may be conveniently operated
by means of a screw threaded spindle extending to the exterior of the suction
pipe. Within the suction pipe at a point adjacent to and on the pump side of the
communication with said receptacle is a grid or grating. The arrangement is such
that during the working of the pump matters arrested by the grid or grating will
be deposited within the receptacle which can be emptied from time to time without
stopping the pump by closing the valve or cover of the receptacle and opening the
discharging door, any matter which may be arrested while the valve or cover is
closed falling into the receptacle upon the said valve or cover being reopened.
According to another construction two chambers arranged side by side are
connected at one end to the portion of the suction pipe that leads to the mouth or
inlet end and at the other end to the pump, and are provided each with a grid.or
grating to arrest any matters that are too large to enter the pump. Communication
between these chambers and a portion of the suction pipe leading to the mouth or
inlet is controlled by a valve which in one position closes the entrance to the one.
Each chamber
chamber, the entrance to the other being then open, and vice versa.
is provided with a removable door or cover suitably glazed to admit of inspection.
As will be evident, with such an arrangement, when so much matter has accumulated...
in the receptacle as to interfere with the efficient working of the pump, by reversing..

page_text: the valve the other receptacle can be brought into use whilst the one first mentioned
is cleared.
Dated this 15th day of December 1894.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
Improvements in Pumping Apparatus, applicable for Dredging
Purposes.__
I, JOHN GWYNNE, of Hammersmith Iron Works, Hammersmith, in the County
of Middlesex, 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 pumping apparatus applicable for dredging
purposes, though it may be otherwise applied.
It is usual to provide the mouth of the suction pipe with a grid or grating to
arrest matters that are too large to pass through the pump. Such grids or gratings
are liable to become more or less choked so that the pumps have to be stopped
and the obstruction removed. Now my invention is designed to obviate this
disadvantage. For this purpose in some convenient place between the mouth piece
of the suction pipe and the pump I provide a trap or arrester or traps or arresters
-with a receptacle or receptacles that can be inspected whilst the pumps are at work,
that can be shut off from the suction pipe, and which is or are provided with a
suitable door or doors so that anything deposited therein can be readily removed
whilst the pump is at work. In cases where two traps or arresters with receptacles
are employed, the arrangement is such that when one trap or arrester and
receptacle are in use the same will be in communication with the pump and with the
mouth of the suction pipe, whereas the other trap or arrester and receptacle will
be disconnected from the mouth of the suction pipe.
Such an arrangement may
assume various forms.
One arrangement of apparatus according to my invention is illustrated in the
accompanying drawings,.
Figs. 1-and 2 being vertical sections at right angles to one another, and
Fig. 3 a plan.
1 is a trap or arrester having an inlet at 1 adapted to be connected to the inner
end of the suction pipe (not shown) and an outlet at 1b adapted to be connected to
the pump casing inlet (not shown). 2 is a depositing receptacle provided with a
door 3. 4, 4 are glazed sight holes. There is a cover or closure to the
receptacle 2; it consists of two metal plates 5 with interposed india rubber packing
ring 5 on a spindle 6 extending through a stuffing box 6" to the exterior of the
upper portion of the apparatus which constitutes practically a part of the suction
pipe, as shewn. 7 is a tube, or sleeve on the spindle. At the upper part of the
spindle is a screw thread on which is a nut 8 with handles 9. by turning which in
one direction the plates 5. will be moved towards one another compressing and
spreading out the packing ring 5* and closing the communication between the upper
chamber of the trap and the receptacle 2; by turning the nut the reverse way the
ring is allowed to contract then the spindle can be drawn up till the cover or
closure 5, 5ª is within the recess 1d where it can be retained by passing a bar 10
through the holes 6° made through the spindle and sleeve, thus opening the com-
munication between the upper chamber of the trap and receptacle 2. In like
manner. the cover or closure can be supported, in the position represented in the

page_text: drawings by passing the bars through the holes 6°. 11 is a grid or grating so
arranged that during the working of the pump matters arrested by the grid or
grating will be deposited within the receptacle 2 which can be emptied from time
to time without stopping the pump by closing the cover or closure 5, 5 of the
receptacle and opening the discharging door 3, any matter which may be arrested
while the cover or closure is closed falling into the receptacle upon its being
reopened. In some cases (for example if seaweed or similar matter be likely to be
drawn in) I find it advantageous to provide a rake for the purpose of clearing the
spaces between the bars of the grid or grating. Such a rake may consist as shewn
of a head 12 with prongs 13 and operating handle 14 passing through a stuffing
box 15. The part of the trap wall containing this stuffing box may advantageously
be made as a removable door as shewa to afford ready access to the grid or
grating.
According to another construction two chambers arranged side by side are
connected at one end to the portion of the suction pipe that leads to the mouth or
inlet end and at the other end to the pump, and are provided each with a grid or
grating such as described to arrest any matters that are too large to enter the
pump. Communication between these chambers and the portion of the suction
pipe leading to the mouth or inlet is controlled by a valve which, in one position,
closes the entrance to the one chamber, the entrance to the other being then open,
aud vice versa. Each chamber is provided with a removable door or cover suitably
glazed to admit of inspection. As will be evident, with such an arrangement,
when so much matter has accumulated in the one receptacle as to interfere with
the efficient working of the pump, by reversing the valve the other receptacle can
be brought into use whilst the one first mentioned is cleared.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. In pumping apparatus providing between the mouth piece of the suction pipe
and the pump a trap or arrester with a receptacle for matters arrested by the grid
or arresting device and means whereby such receptacle can be shut off from the
suction pipe without stopping the pump, substantially as described.
2. Apparatus substantially as shown in and described with reference to the
accompanying drawings for arresting and depositing matters that are too large to
pass through the pump.
3. In pumping apparatus providing between the mouth piece of the suction pipe
and the pump an apparatus for arresting matters that are too large to pass through
the pump constructed with two chambers arranged side by side, each provided
with a grid or grating to arrest matters that are too large to enter the pump and
with a valve whereby communication between said chambers and the portion of the
suction pipe leading to the mouth or inlet is controlled, the arrangement being
such that when the entrance to one chamber is open the entrance to the other will
be closed and that whilst one chamber is in use clearing of the other may be
taking place without interfering with the working of the pump, substantially as
described.
Dated this 16th day of September 1895.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.