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In 1926, an attempt at reviving interest in Edison records was made by introducing a long-playing Diamond Disc which still rotated at 80 rpm but tripled the standard groove pitch to 450 threads per inch by using an ultra-fine groove, achieving a playing time of 24 minutes per 10-inch disc (12 on each side) and 40 minutes per 12-inch disc (these ...
Blue Amberols are more commonly seen today than earlier Edison 2-minute brown or black wax and 4-minute black wax Amberol records. The following incomplete list of Blue Amberol Records is ranked by issue number, title, writer(s), performer(s) and date. Dates are certainly not chronological for either recording or issue; the issue of certain ...
In October 1912 the Edison Diamond Disc Record was introduced. Edison Laboratories had been experimenting with disc records for some 3 years, as the general public seemed to prefer them to cylinders. 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 ...
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.
Blue Amberol Records was the trademark name for cylinder records manufactured by Thomas A. Edison, Inc. in the US from 1912 to 1929. They replaced the 4-minute black wax Amberol cylinders introduced in 1908, which had replaced the 2-minute wax cylinders that had been the standard format since the late 1880s.
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 ...
The weight of a diamond is one of these variables that determines a diamond’s worth and is what the general public is most familiar with. The unit of measurement, called the carat, equals 200 ...
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