The Philips-Miller Method of Recording Sound
The first attempt at mechanographic recording and reproducing was made as early as 1891 but no successful solution of the problem was applied until the invention of J. A. Miller in 1931. The principle of this invention is described in the paper as inertia-free magnification. After the introduction of this principle, the inventor coöperated with the research laboratories of the N. V. Philips Company, of Eindhoven, Holland, in order to solve the problems involved in bringing the system to commercial use. — The method of obtaining a mechanical amplification of forty times is described and illustrated. The mathematical and theoretical advantages of this system over photographic methods are discussed together with the film or tape that has been specially prepared for this process of recording. — Some of the difficulties or precautions that are peculiar to this system and are new to the art of recording, relating to the cutting instrument, cutting material, and also the coating of the film, are described. One type of recording machine is described, with drawings of the most interesting mechanical parts.
- Print ISSN
- 0097-5834
- Published
- 1938-06
- Content type
- Original Research
- DOI
- 10.5594/J14669