Sundav.' Kovomlr 1. 1H25
THEfc'
rage row . . , , . .
Fl
lEndand. on hohalf of l.animilr's POLICE CARS USE
RADIO EQUIPMENT
Radio programs have been de- criterion of whether or not the ob-
tectsd Is ute deposit vaults, in sub- stacls will reflect the wave.
way tubes under rivers, ct under
the sea in submarines.
"There i no question about this."
says Dr. Fulton Cutting, "but iXlthem. They do not reflect, and
some one were to say it Is impos- j therefore the waves pass riKbt
slble he would be just about right. ! through them. In steel buildings
Wooden or brick houses are bad
electrical conductors and radio
waves cannot set up currents in
i-pponent of. fi world-fjmous Urltif a :
scientist.
! After the I'nlifd States went inu Adoptlm ot ra.lliwqulupi'd police
: the war. the secretary of the navr c.tr an ,( in the apprehension
! requested the commissioner of pal- of criminals has Jmi l"en annotinc-
;ents to suspend proceedings because ed by Jacob tiiaul. chief of police
the full time of both parties was re- nf Cleveland. Ohio The announce
quired upon war work of great 1m- mont follows Installaiton aud tests
portance to the government. After. 0f radio receiving equipment In the
the war teallmcny was resumed. ; pdtce chief's private car Installs
and the merit of the invention was nOB of similar equipment In the
eventually sustained by the patent seven other flying squadron depart
office, after an attack for which ment car will follow Immediately,
there are few precedents in vigor or) Th rM,Uad aeriment lias
eight 70-horse power csrs for squad-
quarters to fU-ug
outside Interri-reit
sqtuitn nllttpiit
a ir tuning In hy
Some lucky fellow la oli,g 0 gB, U0(
mat vuryiier 4. dcinopsiralor
saring 01 it , tou
4-
irlngi 'I
skill. Thereupon the contest be
came one to determine whether Dr.
Langmulr was the first inventor.
It can be done, but so badly that however, currents are aet up in the 1 1B(, mor :esllmony had to be taken
ft is hardly worth talking about. ! girders and reflection occurs. lnbr both parties to establish their
Metal and salt water block radio i between girders the waves penetrate I dltM ot inrention. The examiner
waves very effectively. However, somewhat. They bulge into the ! of ,.,.,, adjudged Br. Laug
they do not block them 100 per . building in the process ot bins re-, mur ,he , invmlor. on appeal
cent, and" if waves are powerful fleeted. This phenomenon may l ,h .-., chi, .k, d.i.
especially from a local station, the easily investigated by means of a 1 ,, wa, , ftror of l)r Unt. lu
signals can be received in places ' P rtable loon set. Near the window J malr tn fur,her appeal the ss- r
were tne task would seem hopeless. : oi a ouuaing ot neavy sieei con- rommiMion,.,. held in fsvor
proviaing a sensatire receiver is siracuou signals win sirong. um o( ,ne later ,Ppiu.,nt. Hut on still
usea.
.' Steel
ron work. Eartt ot the cars will
carry two receiving head sets and a
loud speaker In addition to batter- i
les and other radio mechanism. A j
sending elation of special wave !
length will broadcast orders from !
police headquarters to the flying
squads at the precincts or on the
"One of the chief sdvantsges of
the use of radio in the police cars."
If the set is carried Into the Interior ' iurther appeal to the court of ap- (l'clr'l the Cleveland police chief
Is (hsit It will enable us to pick up
tore. The rebounding of the waves , receivers and Indoor antennae." ex- Dr in-mulr waJ the prl
is a physical phenomenon Identical ! plains Dr. Cutting. Aparement ' Th ,,in,i. ,tnll,h
with th. nfii.. . H.i.. . .ii... i.,n.i, . i. , "' 4ne lPan. mougn
prosecuted, were not
ouiinaings sre generally nue signals win get weaser ana . ... ,h, n,..rtct r rumhi
poor places for receiving. The weaker until they practically disap-jne ,ss(8tlat commissioner was re- i our iuadrona anywhere at a mo
radio wares rebound from the steel pear. versed and the court, agreeing with mettt ' notice and concentrate them
framework and very little pene-1 "This shielding effect of steel ,he exalnlll,r 0 Interferences snd j 10 n"d'o emergency work at a glv
trates Into the interior of the strue-' buildings is very harmful to loop',,,. .,., . ,h,f e,.,.,i en point. It will enable ua to cut
or Invent- ai 8 lne elapaed time netween the
diligently ' commission of a rohhery or other
terminated frlnu" " he pursuit of the crltn-
until June of the present year. I , , !
i ne iiieveiunu p.ilice plan culls
Among practical Inventions made for a radio head aet for ue In the
ana patenteo oy nr. t-ansmuir me. front wlt. Another receiving head!
oesi anown is prooaoiy tne type u. .t , installed In the tonneau of
or gas-fllled Maida Incandeecant the car. A loud-ap-akrr Installed
electric light. I ull(ier tne f 0W of lh(, rMr putatri
" i toward the rear ran be used for
NATIVES KKWtKTKI) 8TAKVIM; ; broadcasting to all passenger, of
the car. Teala of police equipment
witn tne reflection of light from a house Installations are In some
mirror. It must be remembered ' cases difficult for this reason. Out
that radio waves and light waves j side antennae generally solve the
are one and t 3 same thing. They problem. When outside antennae
are both what physicist call elec- j are not feasible, however. It is 1m-tro-magnetlc
waves, only light ! portant to get at least a little ex
waves are about a billion times i posure to the radio wave on the
shorter than radio waves of the j outside of the building. A wire
length nsed in broadcasting. 'hung on the ontslde of the building
"Much has been written, both j is generally better than a wire run
mathematically and otherwise, on around the molding of the room,
metallic reflection of light waves. Still better is a wire hung out on
The theory applies to radir waves, the end of a fishing oole. This puts
Simply stated, it is this, when an ' the wire further away from the
electro-magnetic wave strikes a me-building and exposes it to stronger
waves.
tame survace It induces electric
currents in the surface and .hese
currents are such as to etart c new
electro-magnetic wave in the oppo
site direction. If the metal k a
good conductor there is very li-.tle
loes caused by this action, and the
reflected wave is practically as
strong as the original wave. The
electrical conductivity of obstacles
In the path of a radio wave is the waves.
"A phenomenon in connection
with the reflection of waves from
steel buildings is the rapidity with
which the waves fill in behind the
building after they have passed
over it. This filling in will always
occur unless the reflecting body is
several times larger than the wave
length ot the electro-magnetic
NOME Alaska. Oct 30 Vullve
.in- .h ri,,.vni.fc n. showed It possible to hear clearly
Siberia are starving. It w, re. :-' thenar traveled at a speed of
4 mliies an hour,
ported here Friday by Capt. Frank; The headquarter, broadcasting
Preston, who brought his trade suU.m. being equipped for sending
schooner Sea Wolf Into port from 1 hy special wavo length, will permit
that region. I police to communicate' from head-
PAPT GRANTED
ON RADIO TUBES
1916, but this action was revoked 1
petore ttrfrwwatvivaarirsued in or-1
der to permit another person, who
had In the meantime applied for a
patent on this invention, to contest
Dr. Langmuir's right to a patent in
what is called an interference pro-;
ceeding.
fin the rloMnrtlnn nt tfcA lni..rn.. 1
A basic patent for the mnri.ml.n v.- i - - .
- . " ""uswuii uiifuueai a L-
vacnum tube, used extensively in tempted to show that the invention i
raoto x-ray work and In repeaters I was not patentable. On account of!
nsed in long distance telephony, has ; the unusual importance of the in
Just been granted the General Elec-! vention the patent office departed1
"'rr' i!e Unlted Sut'ro " usual practice and permit-,
X br Dr' 1rT? t'U T in"itCd e'abome !' " ""en i
.taunt SL , . I IDgmlll M" on the -ue5tion of patentability, to-'
sr. iJlllTr,0t. th? Cenen" Elec- clud"! testimony, taken In
-- - louviaiurx, in 11Z.
but because of contests the patent
waa not granted until October 20.
The tube is characterised by Its ,
hard, constant vacuum, by its free
dom from visible discharge and oth
r gaseous effects and by its steadi
ness and reliability in operation.
It can be made in large sizes oper
ating with 50,000 volts and upward,
a well as In the smaller sizes such '
as are used in the ordinary home
radio receiving sets.
Prior to Dr. Langmuir's Invention
radio and X-ray tubes were of what '
Is known as the aoft variety that Is. t
they glowed and acted erratically
and unreliably except when used on '
exceedingly low voltages. Dr. Lang-'
xnulr'a Invention., by removing this
aevere voltage restriction, has mode
possible practical radio as we know
It today. i
The patent application has had
an eventful career. Following hi?
Invention of the new tube in 1912.
pent months In thoroughly
testing the Invention. He filed his
application In Ihe patent office In
"Washington in 1313. and made the
Invention known to the wcr'.d by
papers read before scientific sod-'
etles and hy deacrlntlons of the tube
in scientific and popular publica
tions. The new tubes were used for '
radio work by the French army
early In the war and were soon In
regular use In radio and X-ray work
in this country.
The patent application, however.
did not enjoy such Immediate suc
cess. The patent office examiner1
passed the application for Issue In
A smoky lamp once lit our path
The blamed tiling now would
bring us wrath
We hanker for electric light
And other things to cheer the
night
Van Fleet's Serviceman Says:
Thin Ih your electric store. We
Pri-nrh flic ampel of Doing; It
It Kli-rtrirally. We want your
hi inr life to In- more comfortable.
Our M-rvicr-backrtl guarantee
proirrts yon.
I UPON AS
VAX
H.EET'S
MOTOR SHOP
2 Main St.
Day phono 7.W. xi, ...
Before Buying a
RADIO
CALL AT THE
Wirtz Music House
Phone 125 122 So. Sixth St.
Prestodyne and RadioU 26 Radios
See the new Victrola, console model, selling reg
ularly at $200, which we are offering at the ex
tra special price of $98.00.
Sill
The De Forest
All the knowledge and
experience of the man
without whose inven
tions there would be no
radio, have been called
into play to make this the
master receiving set
Exclusive Agents
UHLIG'S ELECTRIC STORE
Phone 234 1Ase as m
- "I
RADIO I
Parts Sets
. i
Expert Repairing
Browning Drake Kits
Let us demonstrate a set using this
circuit It is a knockout for distance
and volume.
Willaid Radio "A" & "B" Batteries
FLOYD HENRIOT CO.
. ,. ' Authorized Delco Remy, Klaxon
and Bosch Service .'.
I outside parile.
! 1
I ISillR. ill? JwJ
r. i tlmt WajsasVfcflBjs.
s,
.4 -
sr t . w . . T
laaicneaumtRadK
...TE rcal Jys f Radio
ft, - tr-z;
H J Z,
1
Z9" S,m'' v fVxn
come to those who own
the best. And the exper
ienced tin knows that the
"best"in Radio now means
the Stewart-Warner. Every
unit in Stewart -Warnct
Radio is not only perfect
in itself, but also accu
ratcly matched for per
fect working unison with
every other unit.
The Matchd
aStewartWsr
mcnt mala
the
wanted
n t-makes w
: things
ntcd a Rail
Let us shbwpj
dertuIMatdBi'.
We will ttfet
technical
you, throui
complete radc:
EARL SHEPHERD CO.
Phone 2S2 507 MiT
7 v
TATEM
MAPlO
TT
A
II a
(Tfwr
ni'il'l
The University of
the Air
IN-THE twentieth century ItnowWg haiH
the common herit.a nf mankind. It is I"
It U yourt for the asking, yours without effort.
out restriction, without tuition ice. 1 I
Thirty-six colleges in various psrts of
are operating broadcasting stations to ctrry
tension courses. Forty-five rMca,,l'!I2
owned by states and cities are puttlni v&'i
national and international Interest on th sit- j
Hundreds of stations are sending out
lectures on travel, science, domestic srts.eecm
and countless other subjects of personal ")
Get your radio today. And take thishinti AtJ
Kent Receiving Sets and Radio Speak J
desirable feature to over-emphasize another"
On WWJ tonight I Th. Aiw.tw " fj
Aftliti ara on h allonlsM-an"l''Tijr
d.r mihi -.i o clock Kaitcrn
Wclhlnkao much of IhUsooS P"S'""Sl
Udi that It la bro.dc.al ' U
WR . . N.w Vofk W.AI . . CI.
WIAR . . Wovld.nc. WOR . .
WOC ..navrnnon What . . Sa"J
WPI . . , Philadelphia WW) . .
WCAB . . I'l...b.a" WCCO . . ""51
Hac M .tmlht orf ro will ((M "'jJS
proa-ram Soooii IA. air .1 a" hour dm "
KaJlo SpaaS.rlPri! .
Model in (without tube .1
Price.-
ModatnC.mpaet
Prl.,-
BALDWIN HARDWARE 0
sy main at.
USSISSSJSII I .