Improvements in Culverts for Electric Mains.
Year: 1892

page_text: Date of Application, 4th Feb., 1892
Complete Specification Left, 4th Nov., 1892-Accepted, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Culverts for Electric Mains.
We, FRED THORNTON, Electrical Engineer, and LATIMER CLARK, MUIRHEAD
AND COMPANY LIMITED, Telegraph Engineers, of 23 Regency Street, in the
City of Westminster, do hereby declare the nature of this invention to be as
follows:-
Culverts for electric mains as at present constructed consist of a trough of iron
or other material provided with a cover and having within it at short intervals
bridge or supporting pieces with notches in their upper edges to receive uninsulated
mains.
According to this invention we make such culverts to receive not only the
uninsulated mains but also insulated cables. For this purpose we make on the
underside of the bridge pieces two or more semi-circular notches and in the bottom
of the trough we make two or more semicircular and corresponding grooves. When
the culvert is laid wires are placed in these grooves which serve to draw in the
cables, the bridge pieces forming guides to keep the wires and cables in the
grooves.
We also form a continuous drain along the underside of the culvert in the
following manner :-We bore holes at intervals in the bottom of the trough and
provide each hole with a ball or other non-return valve. Along the outside of the
bottom we fix a sheet of metal bent into the form of a trough its upper edges being
in contact with the main trough so forming a continuous tube on its underside into
which the holes lead. This tube passes beneath the manhole boxes and discharges
at suitable places into sumpts.
In place of this tube being formed of sheet metal it may be made in one with the
trough.
Dated this 2nd day of Fahmu 100
CARPMAEL & Co.,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Culverts for Electric Mains.
We, FRED THORNTON, Electrical Engineer, and LATIMER CLARK, MUIRHEAD
AND COMPANY LIMITED, Telegraph Engineers of 23 Regency Street, in the City
of Westminster, do hereby declare the nature of this invention and in what
mauner the same is to be performed to be particularly described in and by the
following statement :-
Culverts for electric mains as at present constructed consist of a trough of iron
or other material provided with a cover and having within it at short intervals
bridge or supporting pieces with notches in their upper edges to receive
uninsulated mains.
According to this invention we make such culverts to receive not only the
uninsulated mains but also insulated cables. For this purpose we make on the
underside of the bridge pieces two or more semicircular notches and in the bottom
of the trough we make two or more semicircular and corresponding grooves.
When the culvert is laid wires are placed in these grooves which serve to draw
in the cables, the bridge pieces forming guides to keep the wires and cables in the
grooves.
We also form a continuous drain along the underside of the culvert in the

page_text: following manner :-We bore holes at intervals in the bottom of the trough and
provide each hole with a ball or other non-return valve. Along the outside of the
bottom we fix a sheet of metal bent into the form of a trough its upper edges being
in contact with the main trough so forming a continuous tube on its underside into
which the holes lead. This tube passes beneath the manhole boxes and discharges
at suitable places into sumps.
In place of this tube being formed of sheet metal it may be made in one with
the trough.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a transverse section and Figure 2 a longitudinal section of a culvert
constructed according to this invention.
Figure 3 is an elevation of the bridge piece.
a is the trough having semicircular grooves a¹ in it. b is one of the bridge
pieces having notches 6' in it (to receive the uninsulated mains) and also semi-
circular notches 63 on its underside. c is a sheet of metal fixed along the under-
side of the trough a by screws c and d is one of the ball valves closing the holes
leading from the trough into the drain.
14.
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. In culverts for electric mains, bridge pieces having on their underside two
or more notches substantially as described.
2. In culverts for electric mains the combination of a bridge piece having two
or more notches on its underside with a trough having one or more corresponding
grooves at its bottom substantially as described.
3. In culverts for electric mains, the combination of a trough, holes in the
bottom of the trough, non-return valves in the holes and a drain beneath the
trough substantially as described.
4. Culverts for electric mains substantially as described and shown in the
drawings.
Dated this 4th day of November 1892.
CARPMAEL & Co.,
Agents for the Applicants.