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The Edison Diamond Disc Record is a type of phonograph record marketed by Thomas A. Edison, Inc. on their Edison Record label from 1912 to 1929. They were named Diamond Discs because the matching Edison Disc Phonograph was fitted with a permanent conical diamond stylus for playing them.
The thick Edison Discs recorded the sound vertically in the groove at a rate of 150 grooves-per-inch (GPI) rather than the typical laterally-cut groove of around 100 GPI, which gave 10-inch (250 mm) Edison discs a longer playing time (up to five minutes) than laterals and could only be played to their full advantage on Edison Diamond Disc ...
Inventor Thomas Edison, who always favored the cylinder for all its advantages, also cut his discs with vertically modulated grooves from their introduction in 1912 until a year or two before his company's demise in 1929 (Edison Disc Records). Edison pioneered fine groove discs that played for up to five minutes per 10-inch side; they were very ...
In 1912, Columbia Records, which had been selling both discs and cylinders, dropped the cylinder format, while Edison introduced his Diamond Disc format, played with a diamond stylus. Beginning in 1915, new Edison cylinder issues consisted of acoustic dubbings from Edison disc masters; they therefore had lower audio quality than the disc originals.
The early Blue Amberol releases offered excellent audio quality for their era — better, in fact, than later issues, because from January 1915 onward Thomas A. Edison, Inc., which had been concentrating its efforts on improving the quality of Diamond Disc phonograph records, began to release cylinders which were acoustically dubbed from ...
Made from a nitrocellulose compound developed at the Edison laboratory—though occasionally employing Bakelite in its stead and always employing an inner layer of plaster—these cylinder records were introduced for public sale in October 1912. The first release in the main, Popular series was number 1501, and the last, 5719, issued in October ...
Whether or not you actually watch your DVDs anymore, you likely have a bunch lying around -- and depending on what they are, they could fetch you some extra cash if you're interested in selling them.
The Edison "Amberol" cylinder record, vertical groove Mechanical analog; vertical groove, vertical stylus motion - made from hard black wax - 160rpm standard - 200 threads per inch 1912 Diamond Disc: The Edison vertical-groove "diamond disc" Mechanical analog; vertical groove, vertical stylus motion - made from Bakelite or china clay