Statements (20)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:inventor
|
| gptkbp:category |
optical communication device
|
| gptkbp:distanceOfFirstTransmission |
about 213 meters
|
| gptkbp:firstDemonstrated |
gptkb:Washington,_D.C.
June 3, 1880 |
| https://www.w3.org/2000/01/rdf-schema#label |
photophone
|
| gptkbp:introducedIn |
1880
|
| gptkbp:inventedBy |
gptkb:Alexander_Graham_Bell
gptkb:Charles_Sumner_Tainter |
| gptkbp:operates |
converting sound into modulated light
|
| gptkbp:patent |
US235496A
|
| gptkbp:predecessor |
fiber-optic communication
|
| gptkbp:purpose |
wireless transmission of sound
|
| gptkbp:recipient |
selenium cell
|
| gptkbp:recognizedBy |
IEEE Section
|
| gptkbp:transmitterMaterial |
thin mirror
|
| gptkbp:uses |
modulated light beam
|
| gptkbp:bfsParent |
gptkb:AG_Bell
gptkb:Volta_Laboratory_and_Bureau |
| gptkbp:bfsLayer |
7
|