In Fig. Assuming that
the disturbances which are investigated 70
or utilized for some practical end are rays
identical with resembling those ordinary
light, the sensitive device may sele
nium cell properly prepared, highly
susceptible the influence the rays, the 75
action which should intensified the
use reflector (Shown the draw
ings.
In addition the circuit including the sensi
tive device cell another circuit pro- 85
vided,which likewise connected the ter
minals the condenser. This latter device may roerely
consist two stationary electrodes separated
5 feeble dielectric layer minute thick
ness, but sufficient greatly reduce prac
tically interrupt the current the circuit
under normal conditions, may comprise
terminals one more which are movable
io and actuated any suitable force and are
adapted brought into and out con
tact with each other any convenient man
ner. and similar diagrams modi
fied arrangements apparatus for the same
55 purpose.
From the foregoing the operation the ap
paratus, illustrated Fig.) well known that when cells of
this kind are exposed such rays greatly-
varying intensity they undergo correspond- 80
ing modificationsof their electrical resistance;
but the ways they have been heretofore
used they have been very limited utility. This condition readily secured 125
a proper selection and adjustment the vari
ous devices described, that the receiver
will remain unresponsive the feeble dis
charges the condenser which may take
place when the cell isacted uponbut slightly 130
or not all the rays disturbances; but
if now new rays are permitted fall upon
the cell the intensity those already
acting upon increased any cause then.
The general principle underlying inven
tion and the operation the various devices
used will clearly understood reference
to the accompanying drawings, which—
50 Figure 1is diagram illustrating typical
arrangement apparatus which may used
in carrying method into practice, and
Figs. such case two devices, may
be used, one each connection from the con- 105
denser the receiving-circuit, elseone sin
gle device this kind,but suitably-modi
fied construction, that will make and
break simultaneously and proper intervals
of time both the connections this circuit o
with the condenser and T'. The battery should be
preferably very constant electromotive
force and intensity carefully deter
mined secure the best results. will noted
that, shown Fig. condenser, the terminals
T and which connected charging-
circuit, including battery sensitive de
vice and resistance all connected se-
60 ries, illustrated. Normally—that is, when
it not influenced the rays all very 115
slightly—the cell being comparatively
high resistance, permits only relatively fee
ble current pass from the battery into the
condenser, and hence, the latter charged
at too slow rate accumulate during the 120
time interval between two succeeding opera
tions the device sufficient energy op
erate the receiver or, generally speaking, to
produce the required change the receiving-
circuit. any case will seen
that the disturbances, whatever nature
25 they may be, cause appreciable diminu
tion the electrical resistance the sensi
tive device the current from the battery will
pass more readily into the condenser, which
will charged more rapid rate, and con-
30 sequently each its discharges through the
receiver, periodically effected the special
device before referred which performs this
function, will stronger than normally—
that is, when the sensitive device not acted
35 upon the disturbances. the receiving-circuit
is permanent connection with the battery
and condenser-terminal and should 95
stated that sometimes desirable en
tirely insulate the receiving-circuit all
times, except the moments when the device
d operates discharge the condenser, thus
preventing any disturbing influence which 100
might otherwise caused this circuit by
the battery the condenser during the pe
riod when the receiver should not be.685,956
the receiver and during such intervals of
time may best suitable for the purpose
contemplated. The resist
ance which may frictional in-
65 ductive one, not absolutely necessary; but
it advantage use order facili
tate adjustment, and for this purpose may
be made variable any convenient and pref
erably continuous manner. The sensitive device maybe any the
many devices this kind which are known
15 affected the disturbances, impulses,
or effects propagated through the media, and
it maybe such character that normally—:
that is, when not acted upon—it entirely pre
vents the passage electricity from the gen-
20 erator the condenser, maybe such
that allows gradual leaking through of
the current and charging the condenser
at slow rate. This circuit,
which may called the receiving-circuit,”
includes the receiver and series with it
a device cl, before referred to, which performs 90
the duty periodically discharging the con
denser through the receiver. will at
once understood. Evidently then
if the receiver adjusted that does not
respond the comparatively feeble normal
discharges the condenser, they should
occur, but only those stronger ones Avhich
40 take place upon the diminution the re
sistance the sensitive device will op
erated only when this device acted upon
by the disturbances, thus making possible
to investigate and utilize the latter for any
45 desired purpose. acted
upon
