Insulating Compound therefor.
Year: 1886

page_text: Insulating Compound therefor..
I HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 :-
This invention relates to electric conductors or cables and comprises means for
covering and separating insulated electrical wires, whereby induced currents are
passed off as hereinafter set forth.
In the accompanying drawing
Figure 1 represents a perspective view of a number of electrical wires insulated
in accordance with my invention.
Figures 2 and 3 represent views of detached portions of the insulating means
drawn to an enlarged scale.
Similar letters of reference indicate corresponding parts in the several figures.
A represents a cable formed of a group or number of wires for conducting
electrical currents, the said wires having coverings of cotton or other fibrous
inaterial.
B represents a tape which surrounds some of the central wires of the group, and
CC represent tapes which are disposed in the group so as to extend from the
tape B, or the centre of the cable, to the periphery thereof.
The tapes B, C, are made of threads D, formed of strands E of fibrous material,
with a thin strip of metal or wire F wrapped spirally thereon, leaving small spaces
of the strand between the wrappings uncovered. The threads D are woven
braided together forming the tapes B or C.
or
After the wires and tapes are properly put together, the group as formed is
wrapped with a tape G formed of strands H of fibrous material, and a few strips of
metal or wire J, interwoven or braided therewith, said tape G being in contact
with the edges of the tape C at the periphery of the bunch A.

page_text: The cable as now formed is inclosed in a lead pipe or casing K, and properly
saturated with an insulating compound.
The partly metal and fibrous tapes provide a large metallic surface, which is light
in weight and of flexible nature. The tapes B, C, in the group of wires carry off
the induced currents to the tape G, and thus to the lead pipe or casing, but the
tape G may be dispensed with, in which case, the tapes C will be in contact with
the pipe or casing K. Nevertheless the tape G will be found serviceable for
binding the group of wires and preventing separation thereof.
As an insulating compound, I use resin and resin oil, (the latter being preferably
that known as the first run). This compound forms a cheap, durable, flexible and
highly insulating material which is free from mineral and other acids.
I generally take equal parts of resin and resin oil, and place them in a suitable
tank or vessel to which heat is applied whereby the resin melts and unites with
the oil forming a plastic or semi fluid mass which may be used while hot or
kept for future use when it will require reheating. I may, however, vary the
proportions above given.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed as communicated to
me by my foreign Correspondents, I declare that what I claim is :-
First. In an electric conductor, a woven or braided tape, composed of threads of
fibrous material and metallic wire coiled thereon, substantially as, and for the
purpose, set forth.
Second. A group of insulated wires with flexible tapes formed of fibrous material
and metallic strips or wire interposed between said insulated wires and having
their edges exposed at the surface of the group substantially as described.
Third. A cable formed of a bunch of fibrous covered wires with tapes formed of
fibrous material ametallic strips or wire, and exterior casing, and an insulating
material, for the purpose set forth.
Fourth. In an electric conductor, a woven or braided tape composed of threads
of fibrous material and metallic wire coiled thereon, the coils having spaces between
the same, substantially as, and for the purpose, set forth.
Fifth. A cable. formed of wires having between portions of the same, tapes or
braids composed of threads of fibrous materials with metal strips wrapped spirally
on said threads, the edges of the said metal strips not being in contact, substantially
as described.
Sixth. A cable formed of wires E, the tape B surrounding the wires of the
central portion of the cable, and tape C extending from the tape B to the periphery
of the cable, substantially as described.
Seventh. In an electric conductor, a woven or braided tape formed of threads of
fibrous material having metallic wire coiled thereon, the said braid being placed
between the electric wires and having its edges exposed at the surface of the
group substantially as, and for the purpose, set forth.
Eighth. An insulating compound of resin and resin oil, substantially as described.
Dated this 27th day of April 1886
HASELTINE, LAKE & Co.,
Agents for the Applicant.