such
means air strata,which are easily accessible,
are rendered available for the production of
many desired effects distances however
great.
In several applications filed and pat
ents granted have disclosed other
methods accomplishing results this na
ture which may briefly described fol- 70
lows: I11 one system the potential point •
or region the earth varied imparting
to intermittent alternating electrifica
tions through one the terminals suit
able source electrical disturbances, which 75
to heighten the effect has its other terminal
connected insulated body, preferably
of large surface and elevation.
These various methods have their limitations, 60
one especially, which common all, being
that the receiving circuit instrument must
be maintained definite position with re
spect the transmitting apparatus, which
often imposes great disadvantages upon the 65
use the apparatus. One of
these ways consists producing snit-
35 able apparatus rays radiations—that is, dis
turbances—which are propagated straight
lines through space, directing them upon re
ceiving recording apparatus distance,
and thereby bringing the latter into action.
40 This method the oldest and best known
and has been brought particularly into promi
nence recent years through the investiga
tions Heinrich Hertz.My invention particularly useful con
nection with methods and apparatus for op
erating distant receiving devices means of
20 electrical disturbances produced proper
transmitters and conveyed such receiving
devices through the natural media; but it
obviously has wider range applicability
and may employed, for example, the in-
25 vestigation utilization terrestrial, solar,
or other disturbances produced natural
■ causes. This method, furthermore, allowed 95
advantage taken many those im
provements which are practicable the ordi
nary systems transmission involving the
use metallic conductor. 62,316, (N
om
odel,)
To all whom may concern:
Be known that Nikola Tesla, citizen
of the United States, residing New York
city, the county and State New York,
5 have invented hew and useful Improvement
in Methods Utilizing Effects Transmit
ted from Distance Receiving Device
Through the Natural Media, which the fol
lowing isa specification, reference being had
ro the accompanying drawings, which form a
part the same..
The subject present invention an
improvement the art utilizing effects
transmitted from distance receiving de-
15 vice through the natural media; and con
sists novel method hereinafter described.
Several ways methods transmitting
electrical disturbances through the natural
30 media and utilizing them operate distant
receivers are now known and have been ap
plied with more less success for accom
plishing variety useful results.
NIKOLA TESLA, NEW YORK, Y. Still another way, which
50 has also been known for manyyears, pass
in any suitable manner current through a
portion the ground, connecting two
points the same, preferably consider
able distance from each other, the two ter
minals generator and energize 55
part the current diffused through the earth
a distant circuit, which similarly arranged
and grounded two points widely,apart and
which made act upon sensitive receiver.
SPECIFICATION forming art etters Patent No.
ApplicationfiledAugust 1,1899, R
enew
edM
ay29, 1901.
. The
electrifications communicated the earth
spread all directions through the same, 80
reaching distant circuit, which generally
has its terminals arranged and connected
similarly those the transmitting source
and operates upon highly-sensitive receiver.
METHOD UTILIZING EFFECTS TRANSMITTED THROUGH NATURAL MEDIA. Serial N
o. 685,964, dated November 5,1901.
Another method based upon the fact that 85
the atmospheric air,which behaves ex
cellent insulator currents generated or
dinary apparatus, becomes conductor un
der the influence currents impulses of
enormously high electromotive force which 90
have devised means for generating. Another method
consists passing current through eir-
45 cuit, preferably one inclosing very large
area, inducing thereby similar circuit
situated distance another current and
affecting the same any convenient way
a receiving device.
Obviously whatever method employed too
it desirable that the disturbances produced
by the transmitting apparatus should as
powerful possible, and the use cer
tain forms high-frequency apparatus which
