thermotelephone love



from The Century Dictionary.

  • noun A telephone receiver in which the changes of length, due to change of temperature, of a fine wire through which the currents are made to pass actuate the phonic, diaphragm.
  • noun A telephone transmitter in which a red-hot wire forming part of the primary circuit of an induction-coil has its resistance changed by the sound-vibrations, thus inducing currents in the secondary which are sent to line.


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