I
therefore maintain the sheath either entirely
40 isolated connected directly inductively
to the'ground, through path which will prac
tically prevent the passage currents over
it. The 60
function the sheath static screen for
preventing the dissipation the electric en
ergy, however, requires for its complete ef
fectiveness uninterrupted conducting par
tition screen around the conductor.
A
pplicationfiledJanuary2,1892, SerialNo. When 95
current excessively high potential, how
ever, used, when the frequency the
current very high, such connection isim
practicable account the loss which fol
lows. have also found that when continu
ous insulated sheath screen employed,
45 there greater liability loss energy by
inductive action, for unless the sheath or
screen considerably shorter than the cur
rent waves passing the conductor, electro
motive forces will set between different
50 points the sheath, which will result the
passage between such points induced cur
rents.United States Patent Office. sectional view por
tion the conductor enlarged scale.
SPECIFICATION forming part Letters Patent No.
B insulating coating. Fig. 454,622, but any
30 other system which alternating or, gener
ally speaking, varying currents excessively
high potential are employed.
C conducting sheathing screen, which
may externally insulated, desired. therefore, divide the sheath or
screen into short lengths, very much shorter
than the wave lengths the current used, so
that the grounding any one such lengths 55
or the approach thereto large body will re-
sultin inappreciable loss,orat most small
local draining ofthe energy,while the tendency
of currents flow between different points
in the sheath effectually overcome. means 70
of couductoror conductors thus protected,
I may transmit with slight loss and great
distances currents very high potential and
extremely high frequency.)
To all ivhom concern,;
Be known that Nikola Tesla, citizen
of the United States, residing New York,
in the county and State New York, have in-
5 vented certain new and useful Improvements
in Line Conductors for Systems Electrical
Distribution, which the following speci
fication, reference being had the drawings
accompanying and forming part the same,
to any system electrical transmission or
distribution which currents excessively
high potential are employed, and more par
ticularly, when the frequency high, there is
a dissipation energy from the conductor or
15 conductors the line, due the electrifica
tion the atmosphere other surrounding
medium, other causes. 85
This sheathing divided up, shown, into
short lengths sections, and the end one
section overlaps telescopes with the end of
the adjacent sections but insulated there
from the material 90
It well known that static screen, be
entirely effective such, should have a
ground connection, but has been usual in
such cases provide good electrical con
nection from the screen earth.
N Y.416,773.
I have found that these systems the use
of conducting sheath screen around the
35 line conductors and well grounded, even
brought into proximity external conduc
tors large bodies, attended actual
and generally serious loss energy. 514,167, dated February 6,1894.
The invention illustrated the accom- 75
panving drawings which—
Figure illustrates portions the conduc
tor with the earth connections above de
scribed.
ELECTRICAL CONDUCTOR. 80
A the central wire conductor that car
ries the current.
25 The object invention prevent
loss line conductors system electri
cal transmission and distribution, more par
ticularly such that described pat
ent June 23, 1891, No. at- 65
tain this respect the case sectional
screen, causing the ends the insulated
divisions sections the same overlap,
interposing suitable insulating material be
tween the overlapping portions.
Heretofore has been usual, order to
prevent loss dissipation interference by
20 induction line conductors, insulate the
same and inclose them continuous con
ducting sheathing cover which has been
connected with the ground good con
ducting path. (U
om
od
el. such cases, therefore, obtain the 100
