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Cooke & Wheatstone's double needle telegraph, 1850

Cooke & Wheatstone's double needle telegraph, 1850
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Largest available format 7211 × 8725 px 10 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 7211 × 8725 px 611 × 739 mm 10.1 MB
Medium 847 × 1024 px 72 × 87 mm 483 KB

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IMAGE number
UIG3479986
Image title
Cooke & Wheatstone's double needle telegraph, 1850
Auto-translated text View Original Source
Date
1850 AD (C19th AD)
Image description

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.

Photo credit
Universal History Archive/UIG / Bridgeman Images
Image keywords
alphabet / message / communication / telegraph / operator / messages / telegraphy / letters / handles / telegraph / manipulating / double needle / combined movements / needle / cooke / conventional signals / galvanometer

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