IMPROVEMENTS IN THE CONSTRUCTION OF CORES FOR CABLES FOR SENDING ELECTRIC CURRENTS FOR TELEPHONE, TELEGRAPH OTHER PURPOSES AND IN APPARATUS CONNECTED THEREWITH
Year: 1882

page_text: LETTERS PATENT to William Thomas Henley, of Plaistow, in the County of
Essex, for an Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF CORES
FOR CABLES FOR SENDING ELECTRIC CURRENTS FOR TELEPHONE, TELEGRAPH
PROVISIONAL SPECIFICATION left by the said William Thomas Henley at
the Office of the Commissioners of Patents on the 26th January 1882.
WILLIAM THOMAS HENLEY of Plaistow in the County of Essex.
E
'IMPROVEMENTS
IN THE CONSTRUCTION OF CORES FOR CABLES FOR SENDING ELECTRIC CURRENTS
FOR TELEPHONE, TELEGRAPH AND OTHER PURPOSES AND IN APPARATUS CONNECTED
THEREWITH."
My improvements refer firstly to the construction of a core with multiple
conductors which may be used at will for a number of circuits, or for a few, or as
ono only so that in an Atlantic cable for example for one part of the day or
night it might be used as several telephone circuits and the rest of the day or
night as an ordinary telegraph cable of one circuit, this is done by a switch which
when turned in one direction connects all the conductors in one circuit and in the
other direction connected in separate circuits from two upwards; there must be a
switch at each end of the line and at a given signal the switches must be set.
The accompanying Drawing shows the construction of the core as I propose to
make it for submarine cables; the conductors are first insulated separately and
then all enclosed in another coat of insulation and then served with yarn and
protected with wires in any well known way but in the improvement here shown
the core is surrounded with strong Manilla or Russian hemp or other strong
fibrous material laid up into closely spun yarns which are laid round the core in
long spirals and then served with galvanized steel wires of a small size so as to
combine lightness with strength, the cable is then covered with tapo or yarn and
compound in the ordinary way. Core made in this way with the use of the.

page_text: switches will be found very useful for "leads" for conveying electric currents for
electric light or power purposes where it is sometimes required to transmit currents
of intensity and sometimes of quantity.
My Invention includes the method of working multiple cables as described
whether the separate cores are all enclosed in one insulated covering or not but 5
for long cables I prefer the method of enclosing all in one exterior coat of
insulation as the inductive capacity is thereby lessened and the speed of working
increased owing to the greater distance of the conductors from the water, which
being a conductor is the cause of the induction between that and the conductors
carrying the current which is a troublesome element in either telegraphing or 1
telephoning.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Thomas Henley in the Great Seal Patent Office on the
26th July 1882.
WILLIAM THOMAS HENLEY of Plaistow in the County of Essex. "IMPROVEMENTS
IN THE CONSTRUCTION OF CORES FOR CABLES FOR SENDING ELECTRIC CURRENTS
FOR TELEPHONE TELEGRAPH AND OTHER PURPOSES AND IN APPARATUS CONNECTED
THEREWITH."
My improvements refer firstly to the construction of a core with multiple
conductors which may be used at will for a number of circuits, or for a few, or as
one only so that in an Atlantic cable for example for one part of the day or night it
might be used as several telephone circuits and the rest of the day or night as an
ordinary telegraph cable of one circuit, the ends of the separate conductors being
joined together at each end of the line; this is done by a switch which when
turned in one direction connects all the conductors in one circuit and in the other
direction connected in separate circuits from two upwards, there must be a switch
at each end of the line and at a given signal the switches must be set.
The accompanying Drawing shows the construction of the core as I proposo to
make it for submarine cables, the conductors are first insulated separately and
then all enclosed in another coat of insulation and then served with yarn and
protected with wires in any well known way but in the improvement here shown
the core is surrounded with strong Manilla or Russian hemp or other strong
fibrous material laid up into closely spun yarns which are laid round the core in
long spirals and then served with galvanized steel wires of a small size so as to
combine lightness with strength, the cable is then covered with tape or yarn and
compound in the ordinary way.
Core made in this way with the use of the switches will be found very useful
for "leads" for conveying electric currents for electric light or power purposes
where it is sometimes required to transmit currents of intensity and sometimes of
quantity.
For long cables I prefer the method of enclosing all the separate cores in one
exterior cont of insulation as the inductive capacity is thereby lessened and the
speed of working increased owing to the greater distance of the conductors from
the water, which being a conductor is the cause of the induction between that and
the conductors carrying the current which is a troublesome element in either
telegraphing or telephoning.
Having now described the nature of my said Invention and in what manner the
same is to be performed I declare that I claim,-
First. The construction and employment of cores for cables with multiple
conductors substantially as set forth.
Second. The method of working multiple cables as described whether the
separate cores are all enclosed in one insulated covering or not substantially as
and for the purposes set forth.
In witness whereof I, the said William Thomas Henley have hereunto set my
hand and seal this Twenty-fourth day of July in the year of our Lord
One thousand eight hundred and eighty two.