The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1908-06-27
WIRELESS PHI ON {
IS IN PRACTICAL
OPERATION
CITY or CLEVELAND IN coMMu.
NiCATION WITH DETROIT
WHEN IS MILES AWAY-INvEN-
TOR EXPLAINS SYSTEM.

Thomas e. Clark. OF the Clark
Wireless telegraph Telephone com
pany, OF Detroit, has perfected instru'
ments which place the wireless tele-
phone in practical and commercial
use.
During the past week the Clark
wireless telephone has been placed
In operation In connection with the
Clark wireless station. and the new
steamer. City OF Clevland, Of the D,
& c. line on each trip In and out OF
Detroit, has been in communication
with the Detroit station to talking
distance OF 20 and rs miles,.
Mr.. Clark explains that the work
ing theory of the wireless telephone
is to provide means for radiating a
stream of electrical waves sufficient
ly continuous to transmit the higher
harmonics on which the quality OF
the voice depends and also to provide
means for the modifying OF this
stream of waves In accordance with
the sound waves 30 that the contin-
uously responsive receiver will give
Indications proportionate to the en-
ergy received and be capable Of re-
spending with sufficient rapidity TO
the speech harmonics.
The Clark wireless telephone Is OPP
Grated by frst talking into the trans
mitter and throwing over listening
key to listen to the response from
the other end, although Mr.. Clark Is
now working out a method so as TO
be able to talk and listen simultane-
ously.-
When an operator OF the wireless
telephone system throws In his
switch to telephone. he talks into an
ordinary transmitter and listens In an
ordinary telephone receiver the same
as an operator in a central telephone
exchange.
With the duplex method. Il will be
possible for conversation 10 pro-
coed as over an ordinary telephone
line. II will also be possible TO trans
NIT speech or relay II from local
wire circuit to a wireless telephone
circuit, and Mr.. Clark believes he is
correct In making the statement that
the transmission by wireless tele-
phone Is considerably more distinct
than by wire line and the fine inf1ec-
tions OF the voice are brought out
much better.
As to the immediate possibilities
OF establishing local wireless tele-
phone exchanges. Mr.. Clark believes
there is no immediate prospect that
wireless telephones will take the
place OF the present local wire tele-
phone exchanges, although he says
there Is no difficulty in regard to the
number OF tunes or number OF people
that can be connected by wireless
telephone 10 talk with one another.
The fact remains, however. that each
subscriber must have his own gen.
Grating station or storage battery
power to give energy TO the trans
mitter I'm talking.
Just at the present time. no simple
method is known which would be
practicable II placed in the hands OF
the individual subscriber No doubt
this will be developed as II would be
very convenient TO have each iridivid'
ual subscriber or party call up direct
ly any person he wished without hav-
ing to call through a central tele
phone exchange.
The great field OF usefulness OF the
wireless telephone Is OF course for
communicating faom one vessel "a
another. While the wireless tele
graph apparatus and instruments are
great advantage for boat communf
cation. the equipment requires an
expert telegraph operator who under
stands the Morse code, while with
wireless telephone the captain OF a
boat or any OF the Offices on board