DeForest

Více o knize

This documentary in print on the life and work of the eminent scientist-inventor, Dr. Lee DeForest (1873-1961) is the result of 25 years of extensive research, which reveals the facts of his vital accomplishments contrary to industrial history, previously written books, and recent film presentations which suppressed and demeaned his works. At last the public is told the true story of how in 1906 DeForest's invention of the electron tube amplifier changed the world, making possible long distant telephony, and amplified sound devices used today. Even DeForest's 1920 patent for sound-on-film recording is still in use in all modern sound films.