Berliner Gramophone formulations remained the standard disc record material until the first vinyl records – initially made only for radio use and other special applications – were introduced in the 1930s. Beginning in 1896, Berliner's gramophones were made by Philadelphia-based machinist Eldridge Johnson, who added a spring motor to drive the previously hand-rotated turntable. Berliner also opened an office in New York City, staffed by Frank Seaman and O. D. LaDow and organized as the National Gramophone Company. Master recordings were made onto zinc plates, which were then electroplated and a negative-image "mother" made from them to stamp discs. A major reversal
Don Bradman in popular culture Don Bradman in popular culture The appearances of former Australian cricketer Don Bradman in popular culture are many and varied. As a player, he first came to prominence during the 1928/29 season. His record-breaking performances on the 1930 tour of England made him a national hero in Australia. Bradman was a private person who did not enjoy the adulation associated with his fame. In cricket, a batsman who enjoys an exceptional run of form over an extended period is sometimes called Bradmanesque. Bradman's name has become a generic term for outstanding excellence, both within cricket and in the wider world.