The method, herein described, meas
uring the amount electrical energy ex
pended given time electric circuit
of alternating currents, which consists in
45 maintaining such currents high tension
discharge through rarefied gas between two
conductors, and computing from the amount
of the particles thrown off from said conduc
tors one the same the action the
discharge the energy expended. 50
2. meter for electric currents, consisting
in the combination with exhausted re
ceiver, two conductors contained therein
and connected with wires sealed into the
walls said receiver, the said meter having 70
two line circuit terminals, one connected
with each conductor, therein, set forth. But is
an easy matter determine .
.
40 What claim invention is—
1.
To simplify the calculation, the carbon
S conductors may made rectangular cross-
section, see Fig.by simple cal
culation the amount energy expended in
15 any case, provided the dimensions the con
ductors are known. The combination with working circuit
of alternating currents, translating devices
substantially described connected there
with, primary coil series with the trans
lating device and high tension secondary 60
therefor, meter composed exhausted
receiver having two conductors sealed there
in, one terminal each conductor being con
nected terminal the secondary, set
forth.
20 inductive resistances used place of
the lamps will understood that the
conditions for ascertaining the energy ex
pended must varied accordingly and in
well understood ways, which require spe-
25 cial description herein.
35 The above described plan regard the
most convenient for ascertaining the amount
of the particles thrown off from the conduc
tors, but other means for this purpose may be
resorted to. meter for electric currents, consisting
in the combination with exhausted re
ceiver two rectangular carbon conductors 75
mounted therein and coated with insulat
ing material three sides, and for the
purposes set forth. For example, only one the
30 two conductors need inside the tube, it
being only necessary that they placed in
such relations that the high tension discharge
shall take place between them through the
rarefied gas. The combination with circuit alter
nating currents, meter composed two
conductors connected respectively with the
circuit and separated rarefied gas sub
stantially set forth.514,973
constant which permits the calculation of
the energy consumed from the variation in
the resistance one conductor. meter for electric currents, consisting
in the combination with exhausted re- 80
ceiver, two carbon conductors presenting
surfaces between which discharge adapt
ed take place, and metallic conductors
sealed the walls the receiver and sup
porting said carbons, the metallic conductors 85
inside the receiver being coated with in
sulating material, set forth.
5. The former plan pref
erable, however, the energy may be
directly read off using properly gradu
ated ohm meter. which enlarged cross-
section one the carbons, coated with
an insulating substance expose
only one side from which the material is
io thrown off. 65
4. such case the variation re
sistance may simply multiplied the
constant determine the energy.
Witnesses:
J ames Catlow,
P arker age.
NIKOLA TESLA.
6.
I not limit myself the specific con
struction the instrument herein shown, for
the same may varied many well under
stood ways. 55
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