improvements. in Means for Preventing Accumulation of Sand or Detritus at or in Harbours or Harbour Entrances, Canals, or other Places.
Year: 1896

page_text: Date of Application, 1st Aug., 1896
Complete Specification Left, 27th Jan., 1897-Accepted, 27th Mar., 1897
PROVISIONAL SPECIFICATION.
improvements. in Means for Preventing Accumulation of Sand or
Detritus at or in Harbours or Harbour Entrances, Canals, or
other Places.
I, JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of London,
Gentleman, do hereby declare the nature of this invention (which has been com-
municated to me from abroad by Patrick O'Meara of Pietermaritzberg in the Colony
of Natal Civil Engineer) to be as follows:-
The object of this invention is to provide efficient means for preventing accumu-
lation of sand or detritus at or in barbours, harbour entrances canals or other
places. This I effect by means of stationary dredging forcing or pumping apparatus
which is so placed as to intercept encroaching sand or detritus before it arrives at
the harbour harbour entrance, canal or other place to be protected therefrom the
said sand or detritus being pumped or forced through a pipe or conduit, which is
either overhead or submerged and is led to the place at which the sand or detritus
is to be discharged or deposited, either on land or out at sea. If the said tube or
conduit be overhead it may be arranged as a swing aqueduct to allow of the
passage of vessels, it being if desired worked by hydraulic power from the shore.
The pumps or equivalent apparatus may be worked by steam, electrical or other
suitable motors.
The dredging and pumping or forcing apparatus will excavate a trench or trap
into which the sand or detritus will be impelled by the currents and breakers and
it will then be forced therefrom through the said tube or conduit to the place
whereat it is to be discharged or deposited.
Dated 1st day of August 1896
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION:
Improvements in Means for Preventing Accumulation of Sand or
Detritus at or in Harbours or Harbour Entrances, Canals, or
other Places.
I, JAMES YATE JOHNSON of 47 Lincoln's Inn Fields, in the County of
London, Gentleman, de hereby declare the nature of this invention (which has
been communicated to me from abroad by Patrick O'Meara of Pietermaritzburg,
in the Colony of Natal, Civil Engineer) and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of this invention is to provide efficient means for preventing
accumulation of sand or detritus at, or in, harbours, harbour entrances, canals or

page_text: other places. This I effect by means of stationary forcing or pumping apparatus
which is so placed as to intercept encroaching sand or detritus before it arrives at
the harbour, harbour entrance, canal or other place to be protected therefrom, the
said sand or detritus being pumped or forced through a pipe or conduit which is
either overhead or submerged and is led to the place at which the sand or detritus
is to be discharged or deposited either on land or out at sea. If the said tube or
conduit be overhead it may be arranged as a swing aqueduct to allow of the passage
of vessels, it being if desired worked by hydraulic power from the shore or centre
pier. The pumps or equivalent apparatus may be worked by steam, electrical or
other suitable motors.
The pumping or forcing apparatus will excavate a trench or trap into which the
sand or detritus will be impelled by the currents and breakers and it will then be
forced therefrom through the said tube or conduit to the place whereat it is to be
discharged or deposited.
The accompanying diagrams will illustrate a manner in which this invention may.
be performed. Figure 1 is a plan and Figure 2 an enlarged sectional elevation.
a indicates a foreshore and a harbour (with a breakwater on one side and a
pier on the other side) the entrance to which harbour is to be protected although
it is to be understood that it may be any other place which can be similarly
protected a is the harbour bar, c indicates a pumping apparatus, a branch d² from
the suction pipe d of which descends therefrom to a depth sufficient to receive the
sand or detritus when the pumping apparatus is in operation and this suction pipe
and branch radiate horizontally around a pivot head in front of the pump.
The
said sand or detritus is drawn in and forced through the pump outlet and along a
conduite which is led to the place X at which the sand or detritus is to be
deposited, indicates a part of the said conduit which is formed as a swing
aqueduct which is worked on the centre pier by hydraulic apparatus indicated at g
to allow of the passage of vessels, & indicates the engine which works the pumping
apparatus.
In place of the conduit e being overhead it may be submerged if desired as
indicated by the dotted lines in Figure 2.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Means for preventing accumulation of sand or detritus at or in harbours or
harbour entrances, canals or other places.the said means consisting of stationary
forcing, or pumping apparatus connected with a suction pipe or suction pipes so
situated as to intercept and remove sand or detritus and force it through a pipe or
conduit to a place at which it is discharged or deposited, substantially as hereinbefore
described.
Dated this 27th day of January 1807
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W:C., Agents.