The times dispatch. [volume] (Richmond, Va.) 1903-1914, 1912-08-25
ELECTRIC CURRENT
ACTS AS DETECTIVE
Gives Notice OF Burglary, or Even
Flirtations, in Room
BUZZ GIVES WARNING
When Any Person Comes Into
Apartment the Fact Is
Indicated
BUZZ GIVES WARNING
LONDON. AUG.

-@S->NC-Ns Aus -.
The ancient profession Of burging has
received Yet another shrewd blow SO
las flirting. perhaps.
one OF the latest discoveries OF cleo
'r!ca science Is device Whereby the
presence OF stranger in strongroom
o. any other kind OF room. however
many miles away. can be detected by
ise aid OF an ordinary telephone re-
oaiytr
4 have been Experimenting with the
hgh-ire4uency current which Nj. Tho.ne
ieAs Us Will make chickens grow and XII!
cheese n..;es in thirty seconds" said the
) nng electrician w.o has invented the
iew tH!e:-scarins apparatus 10 re-
ilrie- Yesterday
Wine invest eating the nature OF the
discharges useG 10. eieo;..iy!ng certain
iaiass found taat waen the cage N
WHICH placed ;Aom Was occupied by
some person o. cheese. or even few
'-eese mites, The measuring instrument
iHG!c4-ed the fact.
Change IL the Buzz
"a ies.ed the degree OF variation BY
PASSING the current FIRST through the
cage and iaen through sensitive crystal
- q delicate telephone receiver. There
was distinct change IL the bLzzing
ile cage was respectively occupied and
luuccupied.
u: is my belief that any room could be
60 lifted with collectors connected villa
. crystal OF ferro-s.l.con or carburundufn
just oUtS .Ge-tAey need only be single
Loops Of plain Wire each side OF the room.
'+olBh tne room !.se.i Would also have
- oe wound round with few turns OF
concealed copper w!re-tA4t the presence
Fl. : man or woman n that room would
he evident 20 q person miles away listen
us 81 q telephone receiver connected
N!th the crystal.
a h!gh-irequency current would. OF
course. have to be constantly passing
through the room. It would cost no more
iAan "a burning lamp there.
= rich banker, let Us say. listens At
f.s private telephone connected with
crystal ana strongroom. lie hears the
normal huzzng caused by the high
frequency current. and knows that MS
strong.oom, crammed with bonds and
bullion. IS a peace.
The Bankers Warning
Suddenly the buzzing alters; It be-
comes l!ttlo slower and lower. 4 man
has entered tie stronggoom and Is at
tracing some OF the current to himself
The huzzing becomes SIN slower and
lower. He is not alone, Another mis-
V.ednt has entered the room. Then the
banker has only 20 ring up the police
lie goes on listening, and hears the
Variations IN the buzziag which indicate
Tie departure OF arst one and then the
other v..lan Ii he has the necessary
appliances n;ted. he may have meanwhile
pressed = button and caused Z, photo
graph O.. The thieves 10 be taken auto
,aaucaly IN the strongroom.
such device need not be costly. and
there must he many people who would
oe glad 70 know sometimes whether
particular room was entlrely uaoccup!ed.
og occupied 10y one person only, or BY
Two or more TIE apparatus can be con-
stani!y operating without the persons in
tie room having any knowledge OF its
existence
II am hoping 10 achieve the same re-
suits by wireless methods. and in that
event 1t may u possible at last for hus-
bands and Wigs. to know when their
aosen; spoGses ere lonely and when they
are not"