IMPROVEMENTS IN COM- POUNDS FOR ELECTRIC WIRE INSULATORS, PIPES, AND OTHER ARTICLES
Year: 1883

page_text: LETTERS PATENT to William Phillips Thompson of the Liverpool and London
Agency for Foreign Patent Solicitors 6 Lord Street Liverpool in the county
of Lancaster Civil Engineer for an Invention of "IMPROVEMENTS IN COM-
POUNDS FOR ELECTRIC WIRE INSULATORS, PIPES, AND OTHER ARTICLES" &
communication from John Francis Martin a person resident at Chicago in
the county of Cook and State of Illinois United States of America
PROVISIONAL SPECIFICATION left by the said William Phillips Thompson
at the Office of the Commissioners of Patents on the 7th August 1883.
WILLIAM PHILLIPS THOMPSON, of the Liverpool and London Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, in the County of Lancaster, Civil
Engineer. "IMPROVEMENTS IN COMPOUNDS FOR ELECTRIC WIRE INSULATORS,
PIPES, AND OTHER ARTICLES. A communication from John Francis Martin, a
person resident at Chicago, in the County of Cook, and state of Illinois, United
States of America.
"
This invention relates to a novel compound or composition of matter which will
be found to be of special and marked utility in the manufacture of pipes, tubes,
and other insulators for electric conductors, but which can be also used for various
other articles of manufacture.
The invention consists essentially in a compound consisting of a base composed
of asphaltum and marble dust, to which if preferred, other materials such for
example as shellac can be added, or which can be used without the addition of
such material or materials with highly advantageous results.
In preparing this base, the two articles are taken known to the trade as
asphaltum and marble dust, the former being commonly used in preparing
compounds and the latter in the manufacture of carbonic acid gas for mineral
Waters.
The asphaltum is liquidized by heat, and while hot, from 40 to 60 per cent of
the fine marble dust is poured into the asphaltum and stirred in with the same.
This hot liquid compound is then run into moulds of any desired form.

page_text: It will be found that the compound will rapidly set in cooling, and this action is
so rapid that it should not be allowed to cool until poured int, the moul∙ls.
The moulded article will present substantially the characteristics of a homo-
geneous substance, and will be hard, strong, and susceptible of a high polish.
Its insulating qualities render it useful in the highest degree for pipes or tubes
for electric wires.
Pipes thus made are admirably suited for underground lines, since they are
strong and durable, are not liable to corrode, and are impervious to moisture.
Tubular insulators for houses made of this compound, are also very desirable for
the interior of houses, since in addition to their insulating and durable qualities,
they can also be highly polished.
In some cases if preferred a small quantity of shellac can be added to tho
compound, this latter substance being also a good insulator and serving to render
the article if anything more tough.
The invention is not confined to pipes and tubes, since insulating knobs, boxes,
and the tubes could be made from the compound, and in fact a great variety of
articles produced therefrom, and as no claim is made for any particular variety, no
drawings are shewn, but some description given below of how it may be applied,
for instance, to a solid cylinder formed with a series of parallel longitudinal bores
which in line are coincident with the axis of the cylinder.
To a tube for carrying and insulating underground wires.
To-an insulating-knob-for-electric-wires:
The solid cylinder is especially adapted to be placed within a conduit for
underground wires which are carried through. the bores of the said cylinder.
This cylinder or insulating support can be easily moulded and will constitute an
efficient insulator for the wires.
The tube is also moulded from the compound in any desired length and tubes
thus made can be formed with couplings or be coupled together by separately
made couplings.
These devices serve to illustrate some of the important uses which can be made
of this compound, it being understood however, that numerous other articles can be
made from the same.
Articles inade of the composition herein described are exceedingly tough, hard,
and in fact the composition has some of the characteristics of metal without the
objectionable features of liability to oxydation.
Hence mouldings and tiles for houses, or blocks for paving, fence-posts, and a
great variety of articles can be made of the composition.

page_text: SPECIFICATION in pursuance of the conditions, of the Letters Patent and of
an Order of the Lord Chancellor filed by the said William Phillips. Thompson
in the Patent Office on the 13th February 1884.
WILLIAM PHILLIPS THOMPSON, of the Liverpool and London Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, in the County of Lancaster, Civil
Engineer "IMPROVEMENTS IN COMPOUNDS FOR ELECTRIC WIRE INSULATORS,
PIPES, AND OTHER ARTICLES A communication from John Francis Martin, a
person resident at Chicago, in the county of Cook and state of Illinois, United
States of America
"
This invention relates to a novel compound or composition of matter which will
be found to be of special and marked utility in the manufacture of pipes, tubes and
other insulators for electric conductors, but which can be also used for various other
articles of manufacture.
The invention consists essentially in a compound consisting of a base composed
of asphaltum and marble dust, to which if preferred other materials such for
example as shellac can be added, or which can be used without the addition of such
material or materials with highly advantageous results.
In preparing this base the two articles are taken known to the trade as
asphaltum and marble dust, the former being commonly used in preparing
compounds and the latter in the manufacture of carbonic acid gas for mineral
Waters.
The asphaltum is liquidized by heat, and while hot from 40 to 60 per cent of tho
fine marble dust is poured into the asphaltum and stirred in with the same.
This hot liquid compound is then run into moulds of any desired form.
It will be found that the compound will rapidly set in cooling, and this action is
so rapid that it should not be allowed to cool until poured into the moulds.
The moulded article will present substantially the characteristics of a homo-
geneous substance and will be lard, strong, and susceptible of a high polish.
Its insulating qualities render it useful in the highest degree for pipes or tubes
for electric wires.
Pipes thus made are admirably suited for underground lines, since they are
strong and durable, are not liable to corrode and are impervious to moisture.
Tubular insulators for houses made of this compound are also very desirable for
the interior of houses, since in addition to their insulating and durable qualities
they can also be highly polished.
In some cases if preferred a small quantity of shellac can be added to the
compound, this latter substance being also a good insulator and serving to render
the article if anything more tough.
The invention is not confined to pipes and tubes, since insulating knobs, boxes
and the tubes could be made from the compound, and in fact a great variety of
articles produced therefrom, and as no claim is made for any particular variety no
drawings are shown, but some description given below of how it may be applied,
for instance-to a solid cylinder formed with a series of parallel longitudinal bores
which in line coincident with the axis of the cylinder.
To a tube for carrying and insulating underground wires.
To an insulating knob for electric wires.
The solid cylinder is especially adapted to be placed within a conduit for
underground wires which are carried through the bores of the said cylinder.
This cylinder or insulating support can be easily moulded and will constitute an
efficient insulator for the wires.

page_text: The tube is also moulded from the compound in any desired length, and tubes
thus made can be formed with couplings or be coupled together by separately
made couplings.
These devices serve to illustrate some of the important uses which can be made
of this compound, it being understood however that numerous other articles can be
made from the same.
Articles made of the composition herein described are exceedingly tough, hard,
and in fact the composition has some of the characteristics of metal without the
objectionable features of liability to oxydation.
Hence mouldings and tiles for houses, or blocks for paving, fence posts, and a
great variety of articles can be made of the composition.
Having thus described the invention as communicated to me, what I-claim and
desire to protect under the Letters Patent is:-
A compound for the purposes herein described, consisting of a base composed of
asphaltum and marble dust, substantially as set forth.
In witness whereof I the said William Phillips Thompson have hereunto set my
hand and seal this ninth day of February in the year of our Lord one thousand
eight hundred and eighty four.
117M D
HANDSON
WMD THOMPSON (2.5.)