Cooke & Wheatstone's double needle telegraph. The letters of the alphabet and a variety of conventional signals; were indicated by single and combined movements of the galvanometer needles. The operator worked the instrument by manipulating the two handles at the bottom and an alarm bell was housed in the upper casing and was used to signal the beginning of a message.
SuperStock offers millions of photos, videos, and stock assets to creatives around the world. This image of Cooke & Wheatstone's double needle telegraph. The letters of the alphabet and a variety of conventional signals; were indicated by single and combined movements of the galvanometer needles. The operator worked the instrument by manipulating the two handles at the bottom and an alarm bell was housed in the upper casing and was used to signal the beginning of a message. by World History Archive/Image Asset Management is available for licensing today.
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Image Number: 1746-28993224Rights ManagedCredit Line:World History Archive/Image Asset Management/SuperStockCollection:Image Asset Management Contributor:World History Archive Model Release:NoProperty Release:NoResolution:6811×9238
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