Improvements in Means or Apparatus for Protecting Underground Electrical Conductors.
Year: 1892

page_text: Date of Application, 1st Feb., 1892
Complete Specification Left, 31st Oct., 1892-Accepted, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for Protecting Underground
Electrical Conductors.
We FREDERICK DAVIS of Palace Chambers, Westininster, in the County of
London, Engineer, and ROOKES EVELYN BELL CROMPTON of Mansion House
Buildings, in the City of London, Engineer do hereby declare the nature of this
invention to be as follows:-
Our invention consists in substituting for the pipes or groups or bundles of pipes
or other channels of iron or other material into which or through which electric
conductors are laid or drawn, cellular cases, preferably made of cast iron, divided
longitudinally into triangular, square or polygonal passages, preferably hexagonal,
arranged in such a manner that the whole cellular casing forms a casting of great
lightness and strength, capable of resisting severe lateral strains, and of such
construction as to ensure sound casting.
We form our casing of a series of lengths of the castings, each casting having
within it the longitudinal cells, openings or ways through which the conductors or
cables may be drawn.
The ends of these cellular casings may be cut square or at right angles to the
line of the cables, but in some cases in order to lessen the risk of the cables
catching against the joint when the cable is being drawn through the casing, we
arrange that the joints should be cut either at an angle to the axial line of the
casings or that the ends be shaped as a male and female V.
In order to maintain the casings in a line each joint is formed with a spigot or
socket cast with the casing or by means of a separate casting to form a jointing
Cover.
The joint may be made watertight by being caulked with gasket and lead cement
or otherwise as applied in jointing ordinary spigot and socket pipes.
In some cases we provide the ends of the cases with lugs or flanges and bolts by
which the adjoining ends can be brought into close contact, jointing material being
interposed between the abutting surfaces. In order to adapt our cellular cases to
carry cables round curves we provide a certain number of standard bends of various
radii,
Dated the 20th day of 1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Protecting Underground
Electrical Conductors.
We FREDERICK DAVIS of Palace Chambers, Westminster, in the County of
London, Engineer, and ROOKES EVELYN BELL CROMPTON of Mansion House
Buildings in the City of London, 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 :-
Our invention consists in substituting for the pipes or groups or bundles of
pipes or other channels of iron or other material into which or through which

page_text: electric conductors are laid or drawn, cellular cases, preferably made of cast iron,
divided longitudinally into triangular square or polygonal passages, preferably
hexagonal, arranged in such a manner that the whole cellular casing forms a casting
of great lightness and strength, capable of resisting severe lateral strains and of
such construction as to ensure sound castings.
We form our casing of a series of lengths of the castings, each casting having
within it the longitudinal cells, openings or ways through which the conductors or
cables may be drawn.
The casings are made preferably with spigots and sockets with space for calking
as with ordinary spigot socket pipes, special provision being made by a recurved lip or 1
distance piece at the spigot end to ensure perfect alignment of the thoroughfares or
ways through the casings, the ends of the divisional webs of the cells being rounded
or shaped as a male and female V to avoid damage to the cable when being drawn
through. The ends of the casings may be at right angles to the line of the cables,
but in some cases in order to reduce the risk of the cables catching against the
joints when being drawn through the casing we arrange that the joints be at an
angle to the axial line of the casings.
In some cases we provide a separate joint cover in place of the socket or cast on
the ends of the casings lugs or flanges whereby the adjoining ends of the casings
are bolted or cottered together, the abutting ends being tongued and grooved or
plain. The cells or thoroughfares in our casings may all be in the same casings of
uniform size and section or one or more of the group may be of larger or smaller
size than the rest and of different section.
In order to adapt our cellular casings to carry cables round curves we provide a
certain number of standard bends of various radii and we also provide junction
boxes with sockets to receive the spigot ends of the casings or with lugs or flanges
to correspond with those of the casings.
Although these cellular casings may be satisfactorily cast either horizontally or
in an inclined position yet we find that a vertical arrangement of the moulding
apparatus is very convenient for our purpose as it enables us to insert the cores:
which form the channels in a more ready manner, without the necessity or use for
chaplets supporting or centreing devices. In order to facilitate the process of
introduction and withdrawal of these cores we sometimes arrange that the cores
should be formed by loam or sand supported on central metallic rods in a manner
well known to those accustomed to the manufacture of pipe cores and that by means
of these central rods the said cores can be arranged and grouped and attached to
cross heads so that they can be readily lowered into place and the distances apart
accurately maintained.
In the accompanying drawing
Figure 1 shows in cross section a 3 channel casing.
Figure 2 shows a 3 channel casing with 2 subsidiary ways c c.
Figure 3 shows a 7 channel casing.
Figure 4 shows a 7 channel casing with 2 subsidiary ways, c, c.
Figure 5 shows an outside plan view of a 7 way casing, d being the socket and
e the spigot, and
Figure 6 shows a longitudinal section through one side of the metal.
In this last named figure the rounding out of the angles of the socket and spigot
ends of the channels is clearly shown at a a².
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. The arrangement, or combination of cellular casings, through which electric
conductors can be laid, or drawn, divided longitudinally into triangular, square, or
polygonal passages, preferably hexagonal, and fitted, in manner substantially as set
forth

page_text: 2. The construction of cellular casings through which electric conductors can be
laid or drawn, substantially as and for the purposes herein described.
Dated this 31st day of October 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicants.