Improvements in the Construction of Unsiltable Harbours and Breakwaters.
Year: 1894

page_text: Date of Application, 20th Oct., 1894
Complete Specification Left, 20th July, 1895-Accepted, 24th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Unsiltable Harbours and
Breakwaters.
WILLIAM SANCROFT RANDALL of 17 Wellington Road Old Charlton in the
County of Kent Civil Engineer and JAMES CHARLES GILMOUR of 21 Franconia
Road Clapham in County of Surrey Civil Engineer, do hereby declare the
nature of this invention to be as follows:-
--
We construct one or more screens or fences of close or open work or a combination
of both of any suitable material or materials to be erected in front of or between
the spaces formed by the piers cylinders or piles carrying the superstructure or
separate therefrom and comprising the arms or approach of the enclosed harbour
or breakwater to such a depth below and height above low water as will sufficiently
secure the enclosed harbour or breakwater as may be desired from the disturbing
iufluences of the waves and in order to admit of the free action and passage of the
tidal or other currents thereby preventing the enclosed harbour or breakwater from
being silted up and obviating the risk of the formation of banks within or around
the said harbour or breakwater & in the neighbouring channels or otherwise affecting
the existing banks channels or coasts.
Dated this Twentieth day of October 1894.
WILLIAM SANCROFT RANDALL.
JAMES CHARLES GILMOUR.
Improvements in the Construction of Unsiltable Harbours and
Breakwaters.
We WILLIAM SANCROFT RANDALL of 17 Wellington Road Old Charlton in
the County of Kent Civil Engineer and JAMES CHARLES GILMOUR of 35 Helix
Gardens Brixton in the County of Surrey Civil 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 :-
We construct one or more screens or fences of close or open work or a combination
of both of any suitable material or materials to be erected in front of or between
the spaces formed by the piers cylinders or piles P carrying the superstructure S
or separate therefrom and comprising the arms or approach of the enclosed harbour
or breakwater to such a depth below and height above low-water as will sufficiently
secure the enclosed harbour or breakwater as may be desired from the disturbing
influences of the waves and in order to admit of the free action and passage of the
tidal or other currents thereby preventing the enclosed harbour or breakwater from
being silted up and obviating the risk of the formation of banks within or around
the said harbour or breakwater and in the neighbouring channels or otherwise
affecting the existing banks channels or coasts.
We construct the screens or fences preferably of cast iron tubes a Figs. 1 and 2,
which are fixed to girders b and b¹ and carried to such a height above high water H

page_text: and depth below low-water Laswill: sufficiently secure the enclosed harbour or
breakwater from the disturbing influences of the waves.
The screens may be fixed vertically as a and a¹ Figs. 1 and 2, and d, d¹
Figs. 3 and 4 or they may berset in an oblique position as cand e Figs. 1 and 3
respectively or in a combination of both systems.
The members comprising the screens or fences may be 'laid vertically as a a¹
Figs. 1 and 2, or horizontally as d, d' and e Figs. 3 and 4. We do not confine
ourselves to the circular form in section for the members comprising the screens or
fences which may be. square, semicircular, oval or of any convenient.form.or.shape
and either sòlid or hollow and of any suitable material or materials.
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 :-
1. A single vertical screen a having its members placed vertically. Figs. 1 &.2.
2. A combination, the vertical screen a on the sea front with an oblique screen o
Figs. 1 and 2.
3. A double vertical screen, back and front composed of members laid vertically
a and aFigs. 1 and 2.
4. A vertical screen with members laid' horizontally d'Figs. 3 and 4.
5. A sloping screen with members laid vertically c Figs. 1 and 2.
6. A sloping screen with members laid' horizontally e Figs. 3 and 4.
7. A double vertical screen back and front composed of members laid
horizontally d and d Figs. 3 and 4.
8. A combination of either or any of the above arrangements the one with the
other.
Dated this 20th day of July 1895.
W. SANCROFT RANDALL.
JAS. C. GILMOUR.