IMPROVEMENTS IN THE MANUFACTURE AND PREPARATION OF MATERIALS ΤΟ BE EMPLOYED FOR PURPOSES " INSULATING PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS, PATENT to Josiah Latimer Clark of 6 Westminster Chambers,
Westminster in the County of Middlesex Civil Engineer, and a Director of
Latimer Clark Muirhead and Company Limited of 23 Regency Street
Westminster for an Invention of "IMPROVEMENTS IN THE MANUFACTURE
AND PREPARATION OF MATERIALS ΤΟ BE EMPLOYED FOR
PURPOSES
"
INSULATING
PROVISIONAL SPECIFICATION left by the said Josiah Latimer Clark at the
Office of the Commissioners of Patents on the 22nd December 1883.
JOSIAH LATIMER CLARK of 6 Westminster Chambers, Westminster, in the
County of Middlesex, Civil Engineer and a Director of Latimer Clark Muirhead
and Company Limited of 23 Regency Street Westminster "IMPROVEMENTS IN
THE MANUFACTURE AND PREPARATION OF MATERIALS TO BE EMPLOYED FOR
INSULATING PURPOSES
"
This invention relates to the manufacture and preparation of materials to be
used in coating insulated wires for Electrical purposes. For these purposes I
employ the material known as oxidised oil, which is prepared by mixing Linseed,
Castor, or other oils with a mixture of Bisulphide of Carbon and Chloride of
Sulphur which mixture produces a spongy elastic compound known by the above
name I mix the oxidised Oil with Asphalt, pitch or other similar resinous
substances and thus form a compound which is useful for insulating telegraphic
wires for Electrical purposes-This compound is further useful for mixing with
other well known insulating materials such as india rubber, gutta percha, "black
wax" (which is a waste material produced in the manufacture of certain kinds of
candles) Ozokerit or "earthwax" paraffin wax, resin, pitch and other similar well
known insulating materials.
In preparing the oxydised oil I sometimes mix or dissolve coal naptha, benzene
paraffin paraffin oil, asphalt or pitch with the chloride of Sulphur and Bisulphide
of Carbon, so as to moderate the chemical action and produce a material better
fitted for mixing with the Asphalt and other materials

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Josiah Latimer Clark in the Patent Office on the 21st June 1884.
JOSIAH LATIMER CLARK of 6 Westminster Chambers Westminster in the
County of Middlesex Civil Engineer and a Director of Latimer Clark Muirhead
and Company Limited of 23 Regency Street Westminster "IMPROVEMENTS IN
THE MANUFACTURE AND PREPARATION OF MATERIALS TO BE EMPLOYED FOR
INSULATING PURPOSES
"
This Invention relates to the manufacture preparation and treatment of
materials to be used for coating and insulating wires to be employed for Electrical
purposes
In carrying my Invention into effect I employ the material or materials usually
known in commerce as "oxidized oil " and I prefer that kind which has been prepared
by mixing linseed oil castor oil or other vegetable oils with a mixture of bi-sulphide
of carbon and chloride of Sulphur this combination producing a spongy elastic
compound well suited for the purpose of my Invention I sometimes prefer to mix
with the oxidized oil prepared as above described an equal proportion of another
description of oil which is also commercially known as oxidized oil but which is
prepared by oxidizing the oil by the action of the atmosphere without the use of
the before mentioned chemicals I then combine or mix the oxidized oil with Asphalt
Pitch or Bitumen and with a small quantity of hydrocarbon oil or hydrocarbon
Spirit such as paraffin oil paraffin spirit Kerosine Benzine or Naptha to assist the
mixture of the ingredients. The compound thus produced may be employed for
covering or insulating telegraph wires in the usual way. I sometimes however
prefer to mix the above compound with India Rubber or Gutta Percha adding also
when preferred a proportion of black wax (which is a waste material obtained in
the purification of crude paraffin) ozokerite or earth wax paraffin wax resin pitch
and the like to cheapen the mixture and the said mixture may be further cheapened
by adding earthy or mineral powders such as Kaolin or French Chalk.
In preparing the oxidized oil by the chemical process I sometimes prefer to mix
a portion of paraffin oil or other hydrocarbon oil or spirit with the vegetable oil
before subjecting it to the action of the chemicals.
After the before mentioned materials have been thoroughly mixed and
incorporated the compound may be then put upon the wire to be covered and this
may be effected by the ordinary wire covering machine such as is used for covering
wires with gutta percha. and if during this process the materials be kept at a high
temperature they will become partially vulcanized especially if the nozzle of the
machine in which the covering dies are placed be specially superheated The wire
so covered may then be passed along the water trough to be cooled in the same
manner as now practised in covering wire with gutta percha.
The proportions of about one part by weight of oxidised oil to about from one
and to one and a half parts by weight of Asphalt or one or more of the herein-
before named materials will give good results but I do not confine myself to such
proportions
Having now described and particularly ascertained the nature of the said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and

page_text: original and therefore claim as the Invention secured to me by the herein before in
part recited Letters Patent is.
The manufacture and production of an insulating material or covering in the
manner hereinbefore described.
In witness whereof I the said Josiah Latimer Clark have to this my Specification
set my band and seal this eighteenth day of June One thousand eight hundred
and eighty four.
J. LATIMER CLARK. (L.S.)