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File:Single needle telegraph (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg

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Summary

Single-needle telegraph instrument. The markings on the dial are Morse code, but not in the conventional "dots" and "dashes" notation. This is the stroke notation used for Cooke and Wheatstone telegraph codes which is more appropriate for needle instruments.

Summary

Description Single needle telegraph (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg
Date
Source Scan from Kennedy, Rankin (1903 edition (five volumes) of pre-1903 four volume edition.) Electrical Installations, vol. V, London: Caxton
Author Andy Dingley (scanner)
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Date/TimeThumbnailDimensionsUserComment
current18:04, 18 March 2010Thumbnail for version as of 18:04, 18 March 2010798 × 923 (123 KB)Andy Dingley{{Scans from 'Rankin Kennedy, Electrical Installations', 1903 |volume=V |page= |figure= |title= |description= }} Category:Telegraphy

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