An Improved Arrangement of Machinery for Dredging by Suction or Pumping.
Year: 1887

page_text: Date of Application, 12th Jan., 1887
Complete Left, 3rd Oct., 1887.
Complete Accepted, 4th Nov., 1887
PROVISIONAL
DIBUITICATION.
An Improved Arrangement of Machinery for Dredging by Suction
or Pumping.
We, JOHN WILSON, Civil Engineer, of Fern Bank, Woodford, in the County of
Essex, and JOHN ALFRED RADLEY, Civil Engineer, of Pelham House, Old Nelson
Street, Lowestoft, in the County of Suffolk, do hereby declare the nature of this
invention to be as follows:—
This invention has for its object an improved arrangement of machinery for
dredging by suction or pumping.
For the purpose of dredging sand, shingle, mud or other suitable material and
delivering the same into the hopper well of a self-propelling hopper barge we utilise
the ordinary engines of the barge to drive two centrifugal or like pumps.
The axes of the pumps are at right angles to the engine crank shaft.
A
The power is transmitted from the engine to the pump shafts by geared bevel
wheels and pinions of suitable velocity ratio or friction wheels may be used.
friction coupling is placed on each pump shaft to avoid breakage if the pump vanes
become set fast.
The suction and delivery pipes are parallel to the keel of the vessel.
The suction nozzles are attached by flexible pipes and ball and socket joints and are
suspended at the stern of the vessel by cranes and tackle capable of being adjusted
in a horizontal as well as a vertical direction so that when working on a shoal or
against a bank sufficient depth and width of water for the floatation of the vessel can
be made without any transverse movement of the vessel itself. The cranes are so
constructed that the running parts of the tackles which support the nozzles lead fair
to the drums of a steam winch provided for raising and lowering the nozzles.
The delivery trunks pass to the hopper well and on each side are provided with
openings which have sliding shutters fitted to them so that any of the openings may
be closed and the trim of the vessel adjusted accordingly.
When the engines are driving the propellers the bevel pinions are slid back on the
pump shafts out of gear-and when dredging is commenced the propellor shaft
coupling is disconnected and the bevel pinions are put in gear.
Dated this 12th day of January 1887.
Tזגונתתיה
C
MAEL & Co.,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
An Improved Arrangement of Machinery for Dredging by Suction
or Pumping.
We, JOHN WILSON, Civil Engineer, of Fern Bank, Woodford, in the County of
Essex, and JOHN ALFRED RADLEY, Civil Engineer, of Pelham House, Old Nelson
Street, Lowestoft, in the County of Suffolk, 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:-
This invention has for its object an improved arrangement of machinery for
dredging by suction or pumping.
For the purpose of dredging sand, shingle, mud or other suitable material and
delivering the same into the hopper well of a self propelling hopper barge we utilise
the ordinary engines of the barge to drive two centrifugal or like pumps.
The axes of the pumps are at right angles to the engine crank shaft.
A
The power is transmitted from the engine to the pump shafts by geared bevel
wheels and pinions of suitable velocity ratio or friction wheels may be used.
friction coupling is placed on each pump shaft to avoid breakage if the pump vanes
become set fast.
The suction and delivery pipes are parallel to the keel of the vessel.
The suction nozzles are attached by flexible pipes and ball and socket joints and are
suspended at the stern of the vessel by cranes and tackle capable of being adjusted in
a horizontal as well as a vertical direction so that when working on a shoal or against
a bank sufficient depth and width of water for the floatation of the vessel can be
made without any transverse movement of the vessel itself. The cranes are so
constructed that the running parts of the tackles which support the nozzles lead fair
to the drums of a steam winch provided for raising and lowering the nozzles.
The delivery trunks pass to the hopper well and on each side are provided with
openings which have sliding shutters fitted to them so that any of the openings may
be closed and the trim of the vessel adjusted accordingly.
When the engines are driving the propellers the bevel pinions are slid back on the
pump shafts out of gear-and when dredging is commenced the propellor shaft.
coupling is disconnected and the bevel pinions are put in gear.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.

page_text: together with suction and delivery pipes and the gear for working and suspending the
nozzle of the suction pipe.
Figure 3 is a part plan below deck shewing the arrangement of the pump driving
gear.
Figure 4 is a part transverse section looking aft shewing the pumps and driving
gear in elevation.
In all the figures the boiler and engines are omitted for the purpose of inore
clearly shewing the pumping machinery.
In Figure 1 the cranes A A are adjusted and held at the required horizontal angle
by stay chains B B B B, the ends of the cranes are upheld by wire rope stays CC
which are led to the top of a wrought iron mast D then passed through sheaves
thereon and made fast to belaying hooks at foot-this mast D has in turn a wrought
iron stay rod E led as shewn to the top of the boiler casing and rivetted thereto.
The cranes A A carry two sets of double sheaves as shewn at F F and G G. The
ropes HH which adjust the vertical position of the suction nozzle (shewn at N in
Figure 2) are rove from the top of the nozzle through either of the sheaves as may
best suit the length of the suction pipe in use, past the fair lead pulleys at the top of
the crane posts and thence to the drums I 1 of a steam winch by means of which
either or both of the nozzles may be raised or lowered. K K are the upper parts
of the delivery pipes above deck and L L are the delivery trunks in continuation
thereof. These trunks extend the whole length of the hopper well M, having openings
at the bottom and sides which are closed by slides so that the distribution of the
dredged material may be regulated at will to adjust the trim of the vessel.
In Figure 2 the general arrangement of one pump may be seen.
nozzle, the flexible pipe, P the ball and socket joint which combined with the
flexible pipe allows the nozzle to be adjusted horizontally and vertically. Qis a
special casting attached to the plating of the barge. R is a cast iron suction pipe.
S is a stop valve which is closed when the pump is being repaired or examined. Tis
the centrifugal pump. K is the delivery pipe. L is the delivery trunk having
openings marked U fitted with slides as before described. The suction and delivery
pipes (excepting the flexible ends of the former) are as seen in plan both straight
and parallel to the keel so that no. impediment is offered to the flow through the pipes
and the resistance of the outboard ends of the suction pipes to the passage of the
vessel through the water is reduced to a minimum. H is the working rope led to the
sheaves G then to the fair lead pulley V and thence to the drum I of the steam
winch. is the wire rope stay. D is the mast and E is the stay rod referred to in
Figure 1.
N is the suction
In Figure 3 A is the main shaft of the engines extended beyond the bed plate B
supported by a hearing at end C and carrying two bevel wheels D D back to back as
shewn. When the pumps are to be worked the bevel pinions E E are put into gear
by sliding along the shafts F F and are fastened by a simple collar and set screw.
The shafts F Fare in two parts and supported by bearings GG, H H and I I. The
two parts of the shafts F F are connected by friction couplings K K which are so
adjusted as to slip if any obstruction clogs the arms or vanes of the pump fans.
This arrangement thus avoids breakage of the fans or of the teeth of the bevel
gearing and when friction bevel wheels and pinions are used there is no danger of
grinding a flat place on the pinion if the fan is suddenly stopped by an obstruction in
the
pump. L is a flanged coupling connected by bolts which are taken out when the
engines are required to drive the pumps.
Figure 4 is an end elevation of the pumps and gear looking aft.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. The combination consisting of the barge; its engines and propellor; the pumps
with their axes at right angles to the crank shaft and driven thereby and the suction
and delivery pipes substantially as described.
2. The combination consisting of the barge; its engines and propellor; the suction

page_text: and delivery pipes; and the pumps with their axes carrying bevelled pinions in gear
with bevelled wheels back to back on the crank shaft substantially as described.
.
3. The combination consisting of the barge; the engines, and the pumps with their
pipes straight and parallel to the keel substantially as described.
4. The combination consisting of the barge; the engines and the pumps with their
pipes and suction nozzles suspended from cranes at the rear of the vessel and
adjustable so that a passage for the vessel may be cleared substantially as described.
5. The improved arrangement of machinery for dredging by suction or pumping
substantially as described."
JOHN WILSON.
J. A. RADLEY.