
train phone

trainfone chalati trains, preshakon aur tower operators parr chaalak dall key beach aavaaj sanchaar key liye pensylvania railroad kii pranali thee. iska upayog dakshini kansas shahar dwara bhee kiya jaataa thaa, aur kuchh hudd taka dulath, misabe aur lohe kii seema parr bhee. yeh radio kaa upayog naheen kartaa thaa, balki vidyut chumbakiya preran kaa upayog kartaa thaa. usa samay rail maargon key paas koee radio aavritti naheen thee, aur prr key vyast network ney pichhale tarikon (ack bhautik kagaj sandesh paarit karna, yaa adesh lene key liye train koo rokane kii aavashyakta) koo aparyaapt paaya. trainfone pranali kaa pahali baar 1936 mein pareekshan kiya gayaa thaa aur 1943 taka ise poorna kiya gayaa thaa.
upkaran.
tata transmitter.
pranali ney track yaa lineside telegraph taaron kaa upayog "tata" transmitter key roop mein kiya. trainfone sanket-saikadon kilohertz mein cumm aavritti dhaara-track yaa taaron key madhyam seey paarit kii gaee thee aur locomotive yaa kaar key praapt karane vaale antina mein ack sambandhit dhaara koo prerit kiya gayaa thaa. seema kewal ack sou phut yaa usase adhik thee, lekin yeh paryaapt thaa.
antina.
mobile train antena ney bhaap injanon key tender key oopar, deejal injanon key shareer key oopar, yaa kebin kaar kii poori lambai (caboose key liye prr shabd) chalaane vaali lambi, haath seey chalane vaali sanrachanaon kaa roop leey liya.
telephone handset.
engineer yaa anya chaalak dall key sadasya niyamit dikhane vaale telephone handset key madhyam seey baat karate they. ack dhyaan dene vaalaa loudspeaker bhee lagaaya gayaa thaa, lekin handset key saath sandeshon koo sunana aasaan thaa.
samasyaaen.
railfone pranali key saath sabse badee samasya yeh thee kii yeh vidyuteekrit kshetron mein kaam naheen curr sakata thaa, kyonki locomotive parr bijli kii aapoorti aur vidyut upkaran seey hastakshep hotaa thaa. choonki vidyuteekrit kshetra prr key sabse vyast kshetron mein seey they, isaliye yeh ack gambhir nuksan thaa.
pratisthaapan.
1960 key dashak mein radio key apane niyantran mein aaney key baad trainfone pranali koo chhod diyaa gayaa thaa.

