BEFORE THE SPEAKING TELEPHONE

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BEFORE THE SPEAKING TELEPHONE Brian Winston
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Key arguments of WinstonSuggests that we can
see telegraph, telephone and radio as evolving
through a series of phases1.Ideation /
Existing Science2.Prototype3.Invention4.Diffusi
on5.Spin-offs
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Ideation Wheatstone 1831 Du Moncel 1853
Boursel 1854. Science telegraphy, speech
synthesisers, phonautograph 1855 manometic
capsule, Page effect 1837 variable resistance
1856, Helmholtz Prototypes Reisss telephone
1861 Gray Harmonic telegraph, 1875, liquid
transmitter 1877
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Electromagnetic Wave Theory
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Phonautograph
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Variable Resistance