Machine for Cutting Master Disc Records

The machine used in recording sounds on phonograph discs synchronously with associated pictures consists essentially of a turntable, bearing the “wax” and rotated by a synchronous motor of constant speed, and an electricity driven stylus cutting the word. In the design of this machine the primary aim is to ensure that the record is both faithful to the original sounds and synchronous with the pictures. Fidelity in the performance of the stylus would be vitiated by departures from uniformity in the speed of the turntable while sounds were being recorded or reproduced. Although a constant speed motor is used, its value would be destroyed if the machinery transmitting the drive motor to turntable were not equally free of velocity variations. Thus the problem of fidelity involves not only the motor and the stylus but all the moving parts of the machine.

Print ISSN

0096-6460

Published

1929-05

Content type

Original Research

DOI

10.5594/J10217