The Telephone, the Microphone & the Phonograph
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About this book
Th. Du Moncel is credited with The Telephone, the Microphone & the Phonograph. A section headed “ORDINARY ARRANGEMENT OF THE BELL TELEPHONE” says the arrangement most generally adopted consists of a kind of circular wooden box fitted to the extremity of a handle. A section on Edison’s Chemical Telephone says the effects Mr. Edison produced with his electro-motograph prompted, about the beginning of the year 1877, his idea of applying its principle to the telephone.
The text says that to understand the principle of this telephone it must give some account of Mr. Edison’s electro-motograph, discovered in 1872. M. Zetzche is said to speak highly of an alarum devised by Professor A. de Weinhold. The text describes an organ of sound that consists of a steel bell from 13 to 14 centimètres in diameter, toned to give about 420 double vibrations in a second.
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Book facts
- Author
- Th. Du Moncel
- Pages
- 199
- Language
- English
- Genre
- Engineering
- Formats
- PDF, EPUB, Read online