BSTJ 20: 3. July 1941: Abstracts of Technical Articles by Bell Systems Authors.

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Abstracts of Technical Articles by Bell System Authors

Tontaiee Staulands for Wood Paes Bewme Approved American Stoné-
sid! Racsano C. octasrox. The sie American Tentative Standards
overing yestacins for wood pele, aeveral af which were mpprowed by
‘he Amccnn Standards Assesntion a2 tative hn INS] nace vest
1955, Lave now been seviened hy the ASA cemmmittes and spon! hy
the ASA ac Tull Amerkan Slarcans. 10 reviecing the stander, Cat
coruaittes found Wat ‘he general eioryles af te star eqaiemeats
hheve beor anivesallyrecoized a2 a saifactory basis for the seein of
poles. Covering as they do warliern while rola poles, western re cecar
Doles, cesta oles, seater pine oles, lgeple pine ples, and Douglas
Spots, the standards representa rstonal unidorm standerditstion syste
for thecitmajr pale inter of whe Uae Sate

"The standards establish practical nit at cane apie peomomically
Jn the pre of pols for general ue, but they are intended ko fo be
esi enum to cover the purchase of pales of high uly for spexta
parpane. At theseme de, isan dese that they eal hea nsec
tive dha any considercale quotty ef table ples produced unéer normal
‘reduction pratees would be shee subslantaed becsute ofthe pecs:

“The standard specications incude material requirements for shape snd
‘Seoihines of grain lift defects suchas knots, reeks, set cara ed
fecay, al lee the mince qunlity of neceptle ples Lethe slaw
fords, departures fram stightaeis sre het within practise for
tcinary use. Desay’ and the presence of wal rlting fomgi are gene
truly probit, Definite limitation en nate are sean fr led ples
ae seeptabecaly by speciel area ltrs placer noel porches

"The stander sinwasious wow forled with the specications in one
stundard for each type of ple, were haved om rroremended ibe etece
fontaine! in the American Sead Jor "imate Fiber Steses oe Wood
Poles (15-1940), ‘Tey mere approved as Ainerian Stolen fom thet
Snceptin, ad wai they ere ince with te apeenton nthe pete
‘Aercan Staudarde Uy were comileal ws separate stndescs These
‘anal imensons have all been prepared ceoeding to the some pte
ple for ll typerof poles, The eae at st fet fra the but in ltt
standards have been so fica with respect ta grarane resting momets,

adc Sombie 18,
‘hat for ay give lass aa length of pol ix species ace eral in
Sven, Tt elelating Dnse saedee from bl sass, diezzce from che
Frat ch ground line for sy given ple we saseed, by din ie
tshown inthe olan i Uh tables Meee "Ground Line Distance from
Butt The equaliy-inatiengea principle lds good, however, for any
caunable depth of se ruc.

“Approval of thes standards 2! thi ne followed a palcy aly
the Starlads Counc ofthe Amen Standards Association in 8p 183.
Bt tral vie Ci Stands Col dace to wih ayproral of stand
‘Sak Icing = entasive stuns al eequested the recone ion of such
Sunes wil the ide o eer diaearng them or of advancing them to
‘Rance Semen

Equiv Relais the Sob Shot of ho Tron Crd Sytem WC
Tien and E, §, Gamusae, ‘ene are zportan transformations fn he
ov in the ioncobalt gyater. Che of eso originates rom he Ae Leans=
Formation in eon. Cobol i the bigay apvtem alla aes he 8, tans
formation to» masini inthe raion of 45 weight per cnt enbale- Tur
Ive editions decree the tuiatature of censurmation which reply
ippnachce oom cenpeabare in the resin of 0 weit percent cobalt,
[aa extended two phase on es 76,5 t0 BES wll pe con coal was
Celablist! at 60 does Cent 110 degrees Fab

"An erdecisorder tunaton occurs nthe ap pase ithe min f St
speght pervot cobalt. ‘Theertel temperature af order sin he mihi
Foo of FA degrees Cent, {1299 degeees Fah} epencing por. Ua cam-
Dreton. The ore! arauyeneat has the csr rior sues

“Te lattice constants of ‘he alpia phase devine widely fom a Lixear
Fuetion of the edule content, Tho fest additions of cobalt ierese the
fellsize co marian ae apprenizately 20 per ont cabal. Furtber aie
tions faut in» contrat a be eal sire to She init of the alba phase.
Compositions inthe regi of 0 per cot halt exhibit a iene nce
sian on oering

Dacrmination of Miaraphone Performance’ Wt Hovemn sud FF.
Keenistowe, Methods of ihe-sining tae performance Cuaracivstics of
Iesephones by aerusticswasurcansts ave dezetived. Wok factors in
‘alvin the acruracy ofthe metands sre sewed. ‘The extratio be-
Tneen a microphone’ perkocnance ag determino! Vy. acoustic measure
rent and by Ustening ets reported, Applian of oth types of est
(ore stuio type of eendiidmetophone ie given a8 ab example

Frans ie’ Are ear, ht 94
Ansracrs oP recunicas aRrtcias sot

Room Noite Spdra ot Subailes' Telephone Locations Dawa.
Mori That room mole eae 4 distinc hace £9 concersaion By
spasking tie speech sounds the ae the Hetener xd thas ping che
fone are acctry of rerio sof cuuidershle concern Yo the lepine
finer. Room rnin not ani contests the juan ial he
‘Eesigu aa engineer ng of telesPoce systems capable af afording slfartone
secvie, ial cre ofthe facars bi ator ehe costs ofthe leas
Dla. “ae eects of noise a elepioaecinwenstionsepend of cOuz8,
pon the ehaactriatic othe ois which oceut atthe pleces where le

pases ate being uted. The arrangerents and practise sacesatsy for
edu corso nie: depen pon 9 Enamedze of thee asa
fica te rel miners mesancements of reo nis ve hues al
from sine vo time over & perind of many years by ell Setem ctincer
For the most pt such metauteies have iva ieterrinetion ofa
singlefigare to represeat she nose ease an then evo cond
Teste deseid by Mr. D. seacod in he uly 1040 ise of The Journ
Of the Anenstial Soity of America While such measurements ane ie
‘alu a previding sntorratoa om tke equstiy uf wrucnene of ier
csi eeu eephone eatin, thee va anand hy actor
revsurements of che dtebution of the nose enemy thesiget the fe
quency baad involves ia she receptiosof spac. ‘The prevent oper ce
‘Seibel mawirments ond some ohe oft of a aumber of soetsbe sng
‘tctorson toe spectrum oft toe. Tcesln that te spcteemn of om
oie ha chamcleritic shape

iim Scanner for Us Tieision Tronomsion Tess) Aas Gs Jes
sex. This paper describes the tiga snd curstacion of w seein ls
frauner penal den for we 9 sing foe in eon cicita
fukzble fer teevbon progeam eanamisin,

“The equipment employe elctonie saul atl the image distotor fs
seed at the lecrone Pickup sevice. ‘he lange sorte has igh
tlegeee of Har kate Teh inpwt av sige ouspus es Ce pete
Spal f vot acca! ly any xpickrssbacing signal Pusthunane
Gee dzectcurreat cuappnant a the tleisonsigoa is dvcty avalible st
fe output of the Lube The loser sensitivity of rhe eesctr tbe eat
Inporlant ia ncuesivera Migh'y ect optica poeecton system makes
I possible tu cverilesice Jo ih degen,

Iii scaanars fr eaerlainment paren eects to wes orinary
‘btsame motion ictus sad rl Fn scanners Uheretore inte © me

She tee nae a
Pa PLL SYSTEM TERHICAL JOURNAL

nicl or opel eanslting mucin fr translating the fame ra
etre fata 30frome inferlsee® nevis picture, 10 dhe pest euip-
Ine it was feund snore expeient zo simplify she remstrctoa by oie
the us of epeilly piste kn. Opdirary Mute fy “stcetched" by
Princng ceery offer Ire tne andthe remaining Lanes thee tes i
Fccoston herby producing aim cit tal af €0 fees iste! of the
figeal 2. Veal sanaing they sel hy dh eoatzags mation of
{his im at the rte of Irmes pe secon au horizontal ecarning hy
simple clectroie line sweep in che disso tube

Acnstic Design Pevtares af Sati Stage, Morin Roms, ad Kev
Rooms -D.Pelown. Asuivey wat madeo!lalio exprrene, ard mess
cronents were made of agen, review rooms, and ober is. hewe data
(new scat and deed v8 wale guide isthe determination of the
Tplinuim elatecteristice sn Uinwasene zommende! for maja studio
ore stage, monitor rus, dubbing soem review roams, end studio
Tt,

“Iormstion regarding Hlllycod preview hese i included in an
Appen,

A New Microphone Pacing Unifom Dively ovr x EeendedBre-
yeney Rayges RN, Maan and WR Hava. new mieropboxe
eseced which consis of s ming ol preiar kav combined with
st proved ribbon pressure gradient element in gvea cardi dietiooal

asactrste. The Ioey of operation ix reviewed, ad consideration is
‘Gn given to varintion in resviny eww Ly diction, eearation of
ts elements, and dipertes fm ter plave abd response chiactriic.
tis then sea bow these variations wre largely climinated by eqtiaation
inthe elevtrial leu 49 that the renllig cietiity Ss pracy in-
fhpandeat ef frequen Iinshovt the ange fom 10 00 ele. The
fee af a moving ell presse else takes high wTiciney poeible, while
the design of an usualy cuygeduibbonelerent provides a racket rel
tiga in oige the tn air carenta, Sever wel dcetone) paters in
lite to the ca attr are provide in te nor nropheney a
The they and merits of ee pltema are pment, Finally aor of he
results whieh wane obtain in eld tine of the pes miropoe ae ie
cose

he Magneto, Vey's Motuiar and Damping of 63 Pemally os
Deponieaton Magis ad Hee! Trent HJ. WILLIS, K. M.

owe ad ea cee a
Ret ne 18.8
ozsern and H.Crmsrisns, This apt disrils neasraats af he
changes in certin py proper af 8 Permalloy Cra es fr ie
ferent thermsl an reshanal ravens art cuniers hem in ration
to the domain theory. ‘The geese ware i hea. rena
fom 25. 10 to 22X10" The cunge in Young's mati with
‘nayliaton to abturadon waied fom 09 te 10S por este, Ube daenp-
ing of mechanien vibrations wens to mestred as dependent on Tages
tion and heat trestment, Vong mvion and the drs cnet
vere determined by measuring the salar! fequeacy of vibra sat the
‘Sth of the resaaceousve of allow rectangle agzaaes neal co
iteshes so ial the magnete cleat was complete without air gap or end
feca