CCT109H5 Lecture Notes - At&T Corporation, Wireless Telegraphy, Lee De Forest
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CCT109H5 Full Course Notes
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Italian inventor marconi created a wireless telegraph that used radio waves to carry messages in morse code. Wireless telegraph company, setting up shore-based radio stations to receive and send telegraph signals to ocean going ships where telegraph wires can"t reach. The wireless telegraph played a pivotal role in the titanic disaster. It helped save the lives of many passengers and this incident got the attention of the public. The congress put radio licensing under the supervision of the department of commerce in the radio act of 1912. During www1, the us navy increased radio technology by giving marconi exclusive rights to his invention. After a settlement, he set up a new company called american telephone & telegraph (at &t). The vacuum tube was invented by lee de forest and was used for radio transmission and reception of sound, voice and music. O & o are stations owned and operated by networks.