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Coherer

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<p>'''''This article is a stub. You can help the GHN by expanding it.''''' </p>
 
<p>'''''This article is a stub. You can help the GHN by expanding it.''''' </p>
  
<p>Paris, France. On 24 November 1890, Édouard Branly [[Branly Invents Coherer|invented the Coherer]], a device important in the early development of [[Wireless Telegraphy|wireless telegraphy]]. The device, a glass tube with terminals containing metal filings, acts as an insulator unless acted upon by an electric spark, when it becomes a conductor. Tapping the device separates the filings and it again becomes an insulator. </p>
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<p>Paris, France. On 24 November 1890, Édouard Branly invented the Coherer, a device important in the early development of [[Wireless Telegraphy|wireless telegraphy]]. The device, a glass tube with terminals containing metal filings, acts as an insulator unless acted upon by an electric spark, when it becomes a conductor. Tapping the device separates the filings and it again becomes an insulator. </p>
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<p>[[Image:Tapping coherer.jpg|thumb|center|Branly's Coherer]]</p>
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<p>[[Category:Communications]] [[Category:Telegraphy]]</p>
 
<p>[[Category:Communications]] [[Category:Telegraphy]]</p>

Revision as of 15:48, 19 July 2010

This article is a stub. You can help the GHN by expanding it.

Paris, France. On 24 November 1890, Édouard Branly invented the Coherer, a device important in the early development of wireless telegraphy. The device, a glass tube with terminals containing metal filings, acts as an insulator unless acted upon by an electric spark, when it becomes a conductor. Tapping the device separates the filings and it again becomes an insulator.

Branly's Coherer
Branly's Coherer