Reis telephone

make-and-break transmittertelephone
The Reis telephone was an invention named after Philipp Reis of a telephonelike device he constructed.wikipedia
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Johann Philipp Reis

Philipp ReisJohann-Philipp-Reis AwardJohann Reis
The Reis telephone was an invention named after Philipp Reis of a telephonelike device he constructed.
In 1861, he constructed the first make-and-break telephone, today called the Reis telephone.

Telephone

phonetelephonesLocal Telephone Service
The Reis telephone was an invention named after Philipp Reis of a telephonelike device he constructed.
Johann Philipp Reis used the term in reference to his invention, commonly known as the Reis telephone, in c. 1860.

Invention of the telephone

inventor of the telephoneinvented the telephonepatent for the telephone
The Reis telephone was developed from 1857 on.

Timeline of the telephone

chronicles the developmentexistence of a transatlantic telephoneon-or-off transmission methods

Thomas Edison

Thomas Alva EdisonEdisonThomas A. Edison
In 1862, Reis demonstrated his telephone to Wilhelm von Legat, Inspector of the Royal Prussian Telegraph Corps who produced an account of it (Legat, 1862), a translation of which was obtained by Thomas Edison in 1875 and which was used in Edison's successful development of the carbon microphone.

Carbon microphone

carbon transmittercarbon button microphonesbutton microphone
In 1862, Reis demonstrated his telephone to Wilhelm von Legat, Inspector of the Royal Prussian Telegraph Corps who produced an account of it (Legat, 1862), a translation of which was obtained by Thomas Edison in 1875 and which was used in Edison's successful development of the carbon microphone.

Parchment

parchmentspergamentanimal skins
The Reis microphone was based on a horizontal parchment diaphragm as a sound transducer.

Magnetostriction

magnetostrictivemagnetostrictive actuatorsmagnetostrictive alloy
Reis's speaker worked by magnetostriction.

Resonator

resonant cavitycavity resonatorresonators
The image, below, shows an advanced version where the iron bar is clamped to a cigar-box-shaped resonator.

Fidelity

lo-fiNo-Fi fidelity
It produces weak sound but has good fidelity.

Electric current

currentelectrical currentcurrents
It requires very high current and is a current-sensitive device rather than a voltage-sensitive device.

Voltage

potential differenceVvoltages
It requires very high current and is a current-sensitive device rather than a voltage-sensitive device.

David Edward Hughes

David E. HughesHughesHughes telegraph
In 1865, however, British scientist David E. Hughes used the Reis telephone with "good results".

List of German inventors and discoverers

German inventors and discoverersfamous inventors and engineersfamous inventors, discoverers and engineers

Microphone

microphonescondenser microphonedynamic microphone
In 1861, German inventor Johann Philipp Reis built an early sound transmitter (the "Reis telephone") that used a metallic strip attached to a vibrating membrane that would produce intermittent current.

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