Every evening, Wilmington daily commercial., 1919-01-20
BELL CO. Perfected
RADIO TELEPHONE
Apparatus Used by American and
Allied Aviators Revolution
ized Plane Control.

With the coming Of pcacr many oi
the wcll-gllaried secrets of the lnstru-
mentalitieS which have helped IN winning
the war are being learned Not least
among them is the wonderful radio telc-
I>houc set which IL is now sand cOntribut-
cd 20 such "A wonderful extent an the VIC
tory The importance OF the work oi the
Bell system m developing the alrplane
radio telephone set Is shown by the letter
which follows from tho Secretary oi War,
Newton - Baker. to 4 \ Vail, president
ui the American Ielcnhonc and Felc-
graph Company
"Thc chlci signal officer General
Squier. has called % my attention. the
splendid splrIt m cooperation and help
fnnCss winch has been cvtnccd during
the war 10y the wonderful engineering
organization of the American Telephone
and Telegraph Company The arplanc
radio telephone set which has proven So
satisfactory To the air service aud which
has brought about entirely now methods
a MILITARY uSr oi arplaucs. IS a particular
example ui the result oi tins co-uperatlon
Tho evolution and Development oi this
and other important apparatus WAS madr
possible oul, becaus, vnur engineering
staff frecl, turnlshcd the mghil technical
know ledge and skill necessary IN The IT,.
Vdopmcf design and manufacture a
thu ~,t~
PLEASE ,NprcSs - Noir engineers my
appreciation II the spcndld service
Rendered
lbe fundamental work IN connccttur,
Witf utrcI.>e ,,l,phui, naS dome q,
tho eng .crr~ d th, h,ll S -tcm PRIOR tu
IN, ,ntrN 3 tms country lrto The Wal. 1s
rcpcrf,yi ia thaf ,ouptut annual Ic-
pur'> Tor iht Ncar- Ipf1 auj I91o Iren
~, rutthpd> and tnp4rtfi~ fh,rr i,rrci
to r h',>ci .ll II ti,, ~ucsr~~tai Nar ar
pll,. lton, % wireless t,IcphoIN li,rc lre
n, leter facts substantially As gycu IN
the Bell y stem rugnccl>
\ considerable tUuc before til, I ntcl
Stafc> entered ~, war our nav, Ma
suplhcd ~ the nlnrerng Department
ul ts Rcli sv~trtn NTH V1r,l,-~ tsi,-
phUIe euthf Designed Tin COMMUNICATION
between "a rra arc ari I STATION "a land
or on ~btr lr1u 'lu- Inn, un until VI,
entered the u.r th Western lcCtru
COMPANY u, manufacturing branch ~
the B,l ~N-trm Is y rari Fl rs general
study, continued It's WurA oi prf,yflul
light compact ~,t~ vhirh would hc avaI.
abl, lur us, uu smai. N,S>,le ami pI aIi-
plau,>
4 ! result n thc vor, winch the Bcil
system engineers h4l lirrad, 3aur 'he
wcre ahlc IN test - tnglcv lrld about
n, hret at lulv lil- actually 'uacmau-
Ftratr tho WORKING ef thr UIr, I,S~ t,lc-
phone between ar a.H'ltn, ari th, ground
and fhs to-f ravs results 4l-o showing
thar i was practice t1 Vorb fhc system
between two or nof arplanet ON De
ccmhrr 1917 af tl, Wright Ilcld pay-
ton OHIO, IN official demonstration WaS
made between planes and planes "a the
ground bctorr tic Arraft Frpiucuor
BOARD and hcf,Fc officers II thc army and
navv.
Two planes ucr, sent m into tho arr.
each equipped with : Rcll cnCDnccr~ Vlr,-
less telephone system These systems Z
werc 80 arranged on tho planes. which I
wert two-Seatcrs, that both piiot and Oh !
scrvcr received the message and IA, /!
observer could communicate with tho
ground or with tho other arpanc. and 4
the pilot and observer could ialk a. cach
other ~ Wlrc telephone thls hring an lu-
portani point iS tho nous, Iu an sir'la,.c IS
such that pllofS and Observers cannot
directly communicate with each other Is,
spoken word ON tho ground thor WAS
one ~ tho wireless telephone outfits
7 hi> was equipped with loud speak ne
receiver 50 that all ~ fhr assembled
officials could hear huih Tho uricr- issued
10 the airpanc> and III, COMMUNICATIONS
from The alrplance