![]() The diamond stylus, which was also used in late Amberola reproducers, was ground to. Linkage to a cork-stiffened, rice paper diaphragm. Records were a half inch thick because they had to be absolutely flat in order to accomodate hill and dale recording.Įxtensive experimentation was performed to develop a reproducer what resulted was a quite heavy overhanding weight with diamond stylus, connected by a silk (or sometimes cotton) The new Diamond Disc records would be a laminate, a condensite core with an outer layer of lacquer. Which was similar to another resin that later became known as bakelite. There was a lot of research going on at this time into phenolic resins, and Aylsworth came up with a composition he called condensite, However, since Edison already had rights to hill-and-dale (as opposed to lateral) recording and used it on his cylinder machines, the obstacle of the Victor needle-in-the-grooveĮdison put his chemist Jonas Aylsworth to work. These patents were ruthlessly enforced by Victor's legal Primarily the needle-in-the-groove patent to advance the record, and the tapered tone arm patent to enhance the sound. Manifold: the discs were louder, more lifelike, less fragile, easier to store, and enjoyed a longer playing time of around three and a half minutes.Įdison, like every other business that had tried to enter the flat disc market, would have to contend with a number of patents owned by the Victor Talking Machine Company, In addition, the cylinder phonograph presented the capability of home recording, although the shaving knife for home recording had been dropped on mostĮdison models with the demise of the Model A machinery in 1904, as the phonograph came to be recognized as a medium for entertainment rather than for business.īy 1910, however, most of the technical problems of recording on the flat disc record had been solved, and the advantages of the flat disc record versus the cylinder were In fact, Edison's 1877 patent had offered visions of the phonograph both as aĬylinder and a disc machine, but the state of recording science in the 1880s and 1890s had favored the cylinder phonograph with its mechanical feed advancing the reproducer at aĬonstant rate of speed. It wasn't that the technical difficulties of a flat disc phonograph had ever been insurmountable. It was patently evident that the future lay with the flat disc record, and so Edison, while publicly pooh-poohing the disc talking machine, began conducting secret research into The A60 (later B60), a machine without a lid, dates to the inaugural Diamond Disc entries of 1912.īy that year, flat disc records were far outselling cylinders and Edison, by choice, was the last man standing in a moribund cylinder market. Left:This rack and wheel constituted the mechanical feed of the Diamond Disc phonograph. ![]()
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