' The spiral form coil secures this no
advantage, while the turns near the-primary A
are subjected strong inductive action and
develop high initial electromotive force. spirally-wound secondary coil with- 7°
in the primary having the end nearer the
latter connected the ground and the other
end elevated terminal The physical
constants coil determining its period of
vibration, are chosen and adjusted that the 75
secondary system the closest pos
sible resonance with the oscillations impressed
upon the primary is, moreover,
of the greatest importance order still
further enhance the rise pressure and 80
increase the electrical movement the sec
ondary system that its resistance small
as practicable and its self-induction large
as possible under the conditions imposed. For
25. apparatus situated in
a remote locality for recording the effects of
55 thesě waves.diagrammatically
represented This source usually a
condenser charged high potential and dis
charged rapid succession through the pri-
65 mary, type transformer invented
by and not well known; but when de
sired produce stationary waves great
lengths alternating dynamo suitable con
struction may used energize the primary
A.
These adjustments and relations being care
fully completed and other constructive fea- 115
tures indicated rigorously observed, the elec
trical movement produced the secondary
system the inductive action the primary
A will enormously magnified, the increase
being directly proportionate the inductance 120
and frequency and inversely the resistance
of the secondary system.
I shall typically illustrate the manner ap-
45 plying discovery describing one the
specific uses the same—namely, the trans
mission intelligible signals messages be
tween distant points—and with this object ref
erence now madeto the accompanying draw-
50 ings, which—
Figure represents diagrammatically the
generator which produces stationary waves in
the . Such immense movements elec- 130
. This relation be
ing observed, the terminal will made to
coincide with the points maximum pres- 100
sure the secondary excited circuit, and
the greatest flow electricity will take place
in the same. ,
In Fig.787,412
trical forces nature and which seemed at
first unrealizable any human agencies; but
b.y gradual and continuous improvements of
a generator electrical oscillations, which I
5 have described Patents Nos. With the knowledge the phe
nomena discovered and the means at
command for accomplishing, these results I
am enabled not only carry out many opera
tions the use known instruments, but
20 also offer solution for many important
problems involving the operation control
of remote' devices which for want this
knowledge and the absence these means
have heretofore been entirely impossible.earth, and Fig.
Instead being directly grounded, indi
cated, the coil may joined series or
othérwise the primary which case the
latter will connected the plate E'; but 90
be that none part all the primary
or exciting turns are included the coil C
the total length the conductor from the
ground-plate the elevated terminal E
should equal one-quarter the wave 95
length the electrical disturbance the sys
tem else equal that length mul
tiplied odd number. 645,576
and 649,621, finally succeeded reaching
electrical movements rates delivery of
electrical energy not only approximating,
but, shown many comparative tests and
io measurements, actually surpassing those of
lightning discharges, and means this
apparatus have found possible repro
duce whenever desired phenomena the earth
the same similar those due such
15 discharges.
The ground should made with great care, 85
with the object reducing its resistance. example, the use such generator of
stationary waves and receiving apparatus
properly placed and adjusted any other lo
cality, however remote, practicable to
transmit intelligible signals control or
30 actuate will any one orali such appa
ratus for many other important and valuable
purposes, for indicating wherever desired
the correct time observatory for as
certaining the relative position body or
35 distance the same with reference given
point for determining the course mov
ing object, such vessel sea, the distance
traversed the same itsspeed, for pro
ducing many other useful effects distance
40 dependent the intensity, wave length, di
rection velocity movement, other fea
ture property disturbances this char
acter. have jxmnd it
practicable produce this manner elec
trical movement thousands times greater
than the initial—that is, the one impressed 125
upon the secondary the primary A—and I
have thus reached activities rates flow of
electrical energy the system meas
ured many tens thousands horse
power. order magnify the elec
trical movement the secondary much as
possible, essential that its inductive con- 105
nection with the primary should not be
very intimate, ordinary transformers,
but loose, permit free oscillation—
that say, their mutual induction should be
small. designates primary coil form
ing part transformer and consisting gen
erally few turns stout cable inap
preciable ,resistance, the ends which are
60 connected the terminals source pow
erful electrical oscillations,
