OR IMPROVED COMPOSITIONS FOR INSULATING CONDUCTORS OF ELECTRICITY AND FOR OTHER LIKE PURPOSES
Year: 1882

page_text: LETTERS PATENT to Charles Walker Text of the frm of Robert WULLOL
Winfield and Company of Birmingham in the County of Warwick
Merchants and Manufacturers for an Invention of "NEW OR IMPROVED
Winfield and Company of Birmingham in the
County of Warwick
Merchants and Manufacturers for an Invention of "NEW OR IMPROVED
COMPOSITIONS FOR INSULATING CONDUCTORS OF ELECTRICITY AND FOR OTHER
LIKE PURPOSES "
10
30
TTAT
PROVISIONAL SPECIFICATION left by the said Charles Walker Torr at the
Office of the Commissioners of Patents on the 27th October 1882.
CHARLES WALKER TORR of the firm of Robert Walter Winfield and Company
of Birmingham in the County of Warwick Merchants and Manufacturers NEW
OR IMPROVED COMPOSITIONS FOR INSULATING CONDUCTORS OF ELECTRICITY AND
FOR OTHER LIKE PURPOSES
33
My invention consists of the new or improved compositions hereinafter described
which compositions are especially suited for insulating conductors of electricity
but are also applicable to other purposes such for example as the construction of
insulating stands or supports for bodies charged with statical electricity.
The essential constituents of the compositions constituting my invention are
pitch rosin and sand. These I mix in the proportions of about one part by weight
of pitch one part by weight of rosin and two parts by weight of sand. The mixture
of these materials is heated until the pitch and rosin are melted and the semi
liquid mass is stirred until the melted pitch and rosin are thoroughly incorporated
and the sand thoroughly mixed therewith. The composition may either be applied
directly that is without solidifying to the particular purpose for which it is required
or it may while in a melted state be cast in moulds so as to form on cooling blocks
which may be stored until wanted and remelted for the purpose of applying the
composition to the insulating of electrical conductors or cables or other purposes.
The composition described is an excellent insulator. It is hard and somewhat
brittle and where it is likely to be exposed to concussion, or where it is desired
that it should be flexible I give to it a slight flexibility by the addition of -a

page_text: small quantity of tallow which is added to the other materials during the process
of incorporation by heat. A composition containing one hundred parts by weight
of pitch, one hundred parts by weight of rosin, two hundred parts by weight of
sand and sixteen parts by weight of tallow possesses sufficient flexibility for most
purposes and is not liable to fracture.
I prefer to use sand of the kind commonly called Calais sand and I prefer to
use Russian tallow, but do not confine myself to any particular kind of sand or
سمالية
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
-by-the said Charles-Walker Torr in the Great-Seal Patent Office on the
18th April 1883.
CHARLES WALKER TORR of the firm of Robert Walter Winfield and Company
of Birmingham in the County of Warwick Merchants and Manufacturers. "NEW
OR IMPROVED. COMPOSITIONS_FOR_INSULATING-CONDUCTORS-OF-ELECTRICITY-AND-
FOR OTHER LIKE PURPOSES"
My invention consists of the new or improved compositions hereinafter described,
which compositions are especially suited for insulating conductors of electricity
but are also applicable to other purposes, such for example, as the construction of
insulating stands or supports for bodies charged with statical electricity.
The essential constituents of the compositions constituting my invention are
pitch, rosin and Calais sand. These I mix in the proportions of about one part by
weight of pitch, one part by weight of rosin and two parts by weight of sand. The
mixture of these materials is heated until the pitch and rosin are melted and the
semi-liquid mass is stirred until the melted pitch and rosin are thoroughly
incorporated and the sand thoroughly mixed therewith. The composition may
either be applied directly, that is without cooling and solidifying to the particular
purpose for which it is required; or it may while in a melted state be cast in
inoulds so as to form on cooling blocks, which may be stored until wanted and
remelted for the purpose of applying the composition to the insulating of electrical
conductors or cables or other purposes.
The composition described is an excellent insulator. It is hard and somewhat
brittle and where it is likely to be exposed to concussion or where it is desired it
should be flexible I give to it a slight flexibility by the addition of a small quantity
of tallow which is added to the other materials during the process of incorporation
by heat. A composition containing one hundred parts by weight of pitch; one
hundred parts by weight of rosin; two hundred parts by weight of sand and sixteen
parts by weight of Russian tallow possesses suflicient Hexibility for most purposes
and is not liable to fracture.
As the addition of tallow causes the composition to soften and melt at lower
temperatures than when the said composition contains no tallow, I reduce the

page_text: quantity of or altogether omit the tallow where the composition is likely to be
exposed to heat. By omitting the tallow and increasing the proportion of sand
the composition may be made much harder and not liable to soften at any
temperature to which insulating compositions are ordinarily exposed.
I do not limit myself to the use of ordinary pitch, rosin, Calais sand, and Russian
tallow as other analogous substances may be substituted for them. For example,
in place of pitch, bitumen may be employed and in place of the dark coloured and
impure resin commonly called rosin the lighter coloured and purer resin may be
employed aud in place of Russian tallow other kinds of tallow may be employed
and in place of Calais sand other kinds of sand may be employed.
Having now described the nature of my invention and the manner in which the
saine is to be performed I wish it to be understood that I claim as my invention
of "New or improved compositions for insulating conductors of electricity and for
other like purposes "-The compositions herein beforo described; that is to say,
compositions consisting of mixtures of pitch or bitumen, rosin and sand or
consisting of pitch or bitumen, rosin, sand and tallow.
In witness whereof I the said Charles Walker Torr have hereunto set 'my
hand and seal this Seventeenth day of April in the year of our Lord
one thousand eight hundred and eighty three.
Witness,
WILLIAM HENRY TAYLOR
Cambridge Street Works
Birmingham.
CHARLES WALKER TORR (L.S.)