US2393218A - Electric distribution system - Google Patents

Description

presenting a h one-fourth of the wave-length of the energy ap plied to the tower, the conductor 49 having internal conductors 50, conf nected to a suitable source of joltagjelsupply; is returned downward to ing bonded to the tower along such downward extension. 'A f The present invention has proven exceedingly ...Y i satisfactory in the installation of antennae for the device; thsliielu beeight ofw frequencyl modulation. and televisionfltranslnisf s sion-randreceptiomtexisti siontowers beingemployedrto supportithe adf ditional antennae-5;: lHaving thusidescribed ng. broadcast transmis.-

claimed ias. new :and-:desiredfitorbe secured-by LettersPatent 1. In an electrical distribution system,-; the, combination;witlral radiatinglantenna tower for signals lof; aifrequency. ,withilrthe broadcast band; of a-higll' .frequency .-antenna. tower. atanelevated point, and means yfor transA 1 mitting highk frequency vsignals to` said1high-frev quency...-antenna' from.l generating... equipment therefor, said means comprising.v a.J coaxial transmission line extending kupwardony and insulated from said. tower to a point approximately onefourth of the wave-length of the broadcast signal energy vapplied 4to the rtower,A said high frequency antenna being spaced from;said Alast named point,A the 1 outerl i conductorraofJ said transmission line I being grounded ladjacent theftowerfbaseland: 'electrically connected to said tower at-s'aid last named point andt over, the distancey between said lastf named pointand said higlrffrequencyf'antenna, and the, inner conductor of -said transmission line i being ,electrically connectedtosaid fhigh frequency s antenna Ato lenergize the latten* 1w 1 1- f ;2. In an. electrical :distribution:.systeiny'the combination with a radiating anten-natower-for transmitting signal energy, 4of a device mounted onzsaidtower -at ian elevated point, and 'means' for transmitting electrical energy between said` device 'and' a point adjacent the tower'base, said means comprising acoaxial transmission line extending upward on and insulated from saidtower to apoint approximately one-fourth of the wavelength of the signal energy appliedy tothe tower; saididevicefbeing spaced-fromfsaidv last named point, the outerconductor of saidtransmissionf line beinggrounded'aadja'cent the towerbasefand 1 electrically connected to said ltower-iat v'said last= named point andvover' the distance between said lastnamed point and'said device, andthe inner-- conductor ofxsaid transmission'line being elec tricallyfconnectedto said vdevice vfor theA trans' mission of energyii 1V i 3. Infan electrical distribution system, the-coln-i" bination with a. radiatingV antenna ft'owerfor sigl nals. of afrequency within the broadcast band; ofia; second antenna :mounted on said towera'tf an elevatedpointand insulated therefrom, means for transmitting signal en'ergyb'etweenf saldi `second vantenna'--'s`i.ndlaUL point l'adjacentl the tower base, said mounted ong-said.

n the.V outer Yc onductonoi said 'fibetwe 'f'Litoweribasefjsaidnneans comprising a coaxial i transmission line extending upward on and inductor are approximately the frequency of thesignal energy. applied: to.;

transmission line extending upward on and insulated from said tower to a point approximately one-fourth of the wave-length of the broadcast signal energy applied to the tower, the outer con ductor of said transmission line being grounded adjacent the tower base and electrically connected to said tower at said last named point, and the inner eeniglueteei Said .irailmision lire being elI i ally vVc'tinrfiected toj'said'scondiantenna for transml t'irg energy.

,4, In an electrical distribution system, the combination with a radiating antenna tower having a line, ccmprisingishielded-;Ji lleiehtnotilssithan One-fourth the wave-length pf the signal` energy applied-to the tower, of a Y tower at an elevated means Ior"'.transmitting electrical energy eri "said device an d a point adjacent the vsulatedfrom said tower-to a point spaced from the. .tslwerftase by. adistance approximately equal toene-@mth offtllesaid.

edadjficent the.Y tower base, and electricallycon-l nected to said tower and theinner ,conductor of. said` transmissionlinc being; electrically `zgonnected to said device lfor' whereby thetowerV base .1 ofthe-rsaidgouter -conlllgout. of:l phase; at- Y transmission got.. energy.: and: the :adiacent portion the tower.L4 w

75,1 In an electrical the L tower atanjelevatedipoint'rthe distance from said pointV t0 the; tower base; fourthpi. the wave-length energy applied to .the tower, andmeans for transinitting high; frequency.y signals to. said 'high fre-i1.

quency` antenna-.1 from generating .equipment` from said towentoapoint fourth of the wave-length of; energy applied to the tower, antennav being spaced from s the broadcast signalk aid `last 'named-point, ltransmission lineybeing grounded adjacent. thetower base land electrically connected to :said .tower `at said Alast named point, .and theninner conductor lot" said transmission line being electrcally connected t'o sal'dhigh frequencyfantenna to energize the lat-f ter( .A Eii'2--"- "ffl:.JZQCWH 6; Inan electrical.distributionsystem; the combination with aradiatingiantnnavtower f rsig nals=r of l aV [frequency within the', broadcast band..v cica high frequency :antennamountd -onisaidi towerat an elevated .fpoint;iandfmeans f'or trans mitting :high`- frequency' signals to'fsaidl Ihigh- 'frequency antenna -.from gen'erating" equipment therefor, said means comprising a coaxial trains-V mission lineuextending'npwarr onra'nd insulated 65:Y

from said tower tof a approximatelyfoiie# fourinofthe ware-ieri''gin'v ofthe broadcast sigf nal energy appliedftto tlietower/th outrfcon'fductor-Lcf said transmission' line being'- grounded electiiarijisiriblii. n' with a radiating' an'tehnatowerfor sig" wave.-length;z .the .outerv 1 conductor of` said4 transmission line vbeingfsrround-Y 1 at said last named-ripoint,

blnation-with a radiatngantenna tower .for sig-:i nals lof;v a frequency within;,the broadcast band, of lafhigh.. frequency yantenna mounted on said?.

being greater than .one-..2 of the broadcast-signal' f,-

said high frequency nals of a frequency within the broadcast band, of, a high frequency antenna mounted on said tower at an elevated point, and means for trans/ mitting high frequency signals to said high frequency antenna from generating equipment therefor, said means comprising a shielded conductor transmission line extending upward on and insulated from said tower to a point approximately one-fourth of the wave-length of the broadcast signal energy applied to the tower, the 10 shield of said transmission line being grounded adjacent the tower base and electrically connected to said tower at said last named point, and a conductor of said transmission line being] electrically connected to said high frequency an- 15 tenna to energize the latter.

8. In combination, a conductive antenna structure, insulated from the ground, used at a predetermined radio frequency, a conductive shielding conduit carrying an auxiliary service to the antenna structure, a low impedance bond between the upper end of said conduit and an adjacent point on the said conductive antenna structure, and a low impedance connection to earth at the lower end of said conduit, the distance between said low impedance bond and said low impedance connection to earth, measured along said conduit, being approximately any odd number of quarter wave-lengths for the said predetermined antenna frequency, said conduit being positioned with respect to said antenna structure so as to form an open wire transmission line therewith.

JOHN B. CARAWAY.

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