This HTML5 document contains 26 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

Prefix	IRI
dcterms	http://purl.org/dc/terms/
dbo	http://dbpedia.org/ontology/
foaf	http://xmlns.com/foaf/0.1/
n13	https://global.dbpedia.org/id/
dbt	http://dbpedia.org/resource/Template:
rdfs	http://www.w3.org/2000/01/rdf-schema#
freebase	http://rdf.freebase.com/ns/
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#
owl	http://www.w3.org/2002/07/owl#
wikipedia-en	http://en.wikipedia.org/wiki/
dbp	http://dbpedia.org/property/
dbc	http://dbpedia.org/resource/Category:
prov	http://www.w3.org/ns/prov#
xsdh	http://www.w3.org/2001/XMLSchema#
gold	http://purl.org/linguistics/gold/
wikidata	http://www.wikidata.org/entity/
dbr	http://dbpedia.org/resource/

Statements

Subject Item

dbr:Automatic_curb_sender

rdfs:label

Automatic curb sender

rdfs:comment

The automatic curb sender was a kind of telegraph key, invented by William Thomson, 1st Baron Kelvin for sending messages on a submarine communications cable, as the well-known Wheatstone transmitter sends them on a land line. For some time, it was the only instrument delicate enough to receive the signals transmitted through a long cable. This self-acting cable key was brought out in 1876, and tried on the lines of the Eastern Telegraph Company.

dcterms:subject

dbc:Telegraphy

dbo:wikiPageID

2293594

dbo:wikiPageRevisionID

989340819

dbo:wikiPageWikiLink

dbr:William_Thomson,_1st_Baron_Kelvin dbr:Electromagnetic_induction dbr:Paper dbr:Wheatstone_transmitter dbc:Telegraphy dbr:Eastern_Telegraph_Company dbr:Signal_(information_theory) dbr:Submarine_communications_cable dbr:Telegraph_key dbr:Current_(electricity)

owl:sameAs

n13:4UbqK freebase:m.071hzj wikidata:Q4826559

dbp:wikiPageUsesTemplate

dbt:Refs dbt:Comm-stub dbt:More_citations_needed

dbo:abstract

The automatic curb sender was a kind of telegraph key, invented by William Thomson, 1st Baron Kelvin for sending messages on a submarine communications cable, as the well-known Wheatstone transmitter sends them on a land line. In both instruments, the signals are sent by means of a perforated ribbon of paper but the cable sender was the more complicated, because the cable signals are formed by both positive and negative currents, and not merely by a single current, whether positive or negative. Moreover, to curb the prolongation of the signals due to electromagnetic induction, each signal was made by two opposite currents in succession: a positive followed by a negative, or a negative followed by a positive. The aftercurrent had the effect of "curbing" its precursor. For some time, it was the only instrument delicate enough to receive the signals transmitted through a long cable. This self-acting cable key was brought out in 1876, and tried on the lines of the Eastern Telegraph Company.

gold:hypernym

dbr:Kind

prov:wasDerivedFrom

wikipedia-en:Automatic_curb_sender?oldid=989340819&ns=0

dbo:wikiPageLength

1443

foaf:isPrimaryTopicOf

wikipedia-en:Automatic_curb_sender