Elisha Gray's harmonic telegraph
GPTKB entity
Statements (16)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telegraph
|
| gptkbp:exhibitedAt |
gptkb:Western_Union
|
| https://www.w3.org/2000/01/rdf-schema#label |
Elisha Gray's harmonic telegraph
|
| gptkbp:influenced |
development of the telephone
|
| gptkbp:introducedIn |
1874
|
| gptkbp:inventedBy |
gptkb:Elisha_Gray
|
| gptkbp:locationOfInvention |
gptkb:United_States
|
| gptkbp:patent |
1875
|
| gptkbp:principle |
uses different musical tones for each message
|
| gptkbp:purpose |
transmit multiple messages simultaneously over a single wire
|
| gptkbp:relatedTo |
gptkb:Alexander_Graham_Bell's_telephone
multiplex telegraphy |
| gptkbp:technology |
electromagnetic relays
vibrating reeds |
| gptkbp:bfsParent |
gptkb:Alexander_Graham_Bell's_telephone
|
| gptkbp:bfsLayer |
6
|