IMPROVEMENTS IN PORCELAIN AND OTHER TETARET "
Year: 1882

page_text: LETTERS PATENT to William Edward Langdon of Derby in the County of
Derby and John Crisp Fuller and George Fuller both of Bow in the County
of Middlesex for an Invention of "IMPROVEMENTS IN PORCELAIN AND OTHER
TETARET "
PROVISIONAL SPECIFICATION left by the said William Edward Langdon,
John Crisp Fuller, and George Fuller at the Office of the Commissioners of
Patents on the 19th September 1882.
WILLIAM EDWARD LANGDON of Derby in the County of Derby and JOHN
CRISP FULLER and GEORGE FULLER both of Bow in the County of Middlesex
"IMPROVEMENTS IN PORCELAIN AND OTHER INSULATORS,"
Heretofore it has been usual to construct insulators especially those known as
"N° 8," "N° 11" and "Z" insulators with vertical sides, the outside surface being
smooth with the exception of the slot to carry the wire.
Now according to this invention we serrate the surface with concentric rings
thus obtaining higher insulating properties; we also for the same purpose provide
increased space between the bolt of the insulator and the point at which the wire
is attached, viz: on the crown instead of on the side of the insulator as hitherto,
The serrations perform a double duty, firstly, in still further increasing the surface
distance between the line wire and the bolt, and secondly, the edges of the
serrations readily evaporate any moisture which may gather upon them, thereby
presenting a corresponding number of lines of comparatively absolute insulation,
quite independent of the moisture which may still cling to the surface of
the ware.
These improvements are applicable to all insulators but especially to those known
as N° 8. N° 11. and Z.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Edward Langdon, John Crisp Fuller, and George Fuller
in the Great Seal Patent Office on the 19th March 1883.
WILLIAM EDWARD LANGDON of Derby in the County of Derby and JOHN
CRISP FULLER and GEORGE FULLER both of Bow in the County of Middlesex
IMPROVEMENTS IN PORCELAIN AND OTHER INSULATORS "
Heretofore it has been usual to construct insulators especially those known as
"N° 8" " N° 11" and "Z" with vertical sides, the outside surface being smooth
with the exception of the slot to carry the wire.
Now according to this invention we serrate the surface of such insulators with
concentric rings and as shown in the accompanying drawings. Figure 1 showing
in side elevation, Figure 2 in longitudinal vertical section, and Figure 3 in plan, an
insulator constructed according to our Invention; a, a are the concentric rings, by
this means we obtain higher insulating properties; we also for the same purpose
provide increased space between the bolt b of the insulator and the point at which
the wire is attached viz: on the crown c instead of on the side of the insulator as
hitherto. The serrations perform a double duty, firstly in still further increasing
the surface distance between the line wire and the bolt, and secondly, the edges of
the serrations readily evaporate any moisture which may gather upon them, thereby
presenting a corresponding number of lines of comparatively absolute insulation,
quite independent of the moisture which may still cling to the surface of
the wire.
These improvements are applicable to all insulators, but especially to those known
as "N° 8" "N° 11." and "Z"
Having now described the nature of our said Invention and in what manner the
same is to be performed we declare that we claim :
In the insulators named the concentric rings a whereby the surface distance
between the line wire and the bolt is increased and evaporation more readily
effected all substantially as set forth.
In witness whereof I the said George Fuller for myself and on behalf of the
said William Edward Langdon and John Crisp Fuller have hereunto set
my hand and seal this Seventeenth day of March in the year of our Lord
one thousand eight hundred and eightythree:
ARODOT
נTTET TO TAT