Edison Disc Record

The Edison Disc also known as a Diamond Disc record, was a type of audio disc record marketed by Edison Records from 1912 to 1929. Edison had previously concentrated on producing phonograph cylinders but decided to get into the disc market due to the increasing market share of disc sound recordings, especially the discs of companies such as Victor Talking Machine Company (what would later be called "78 records"). Victor and most other disc record... more

The Edison Disc also known as a Diamond Disc record, was a type of audio disc record marketed by Edison Records from 1912 to 1929. Edison had previously concentrated on producing phonograph cylinders but decided to get into the disc market due to the increasing market share of disc sound recordings, especially the discs of companies such as Victor Talking Machine Company (what would later be called "78 records"). Victor and most other disc record companies used side to side or lateral motion of the stylus in the record groove, whereas in the Edison system the movement was up and down or vertical, as in a cylinder record. An Edison Disc Phonograph is distinguished by the diaphragm of the reproducer being located parallel to the disc surface. The Victor (or similar) diaphragm is located at a right angle to the surface of the disc. The grooves on an Edison Disc are smooth on the sides and have a variable depth. Standard lateral discs will have a more constant depth, but the sides of the... less