Category:Needle telegraphs
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English: Needle telegraphs are telegraph instruments where movement of a handle at one station causes an immediate movement of needle(s) at the other station.
Type of electrical telegraph | |||||
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Media in category "Needle telegraphs"
The following 9 files are in this category, out of 9 total.
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Cooke and Wheatstone electric telegraph.jpg 2,420 × 3,052; 2.15 MB
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Cooke and Wheatstone telegraph cable.JPG 656 × 546; 103 KB
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Decorators Assistant - telegraph.png 1,000 × 693; 926 KB
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EB1911 Telegraph - Single Needle with sounding arrangement.jpg 330 × 326; 23 KB
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GWR Cooke and Wheatstone double needle telegraph instrument.jpg 1,366 × 1,366; 358 KB
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PSM V03 D418 Single needle instrument.jpg 1,623 × 1,334; 251 KB
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