File:NIE 1905 Telegraph - polarized relay - diagram.jpg
NIE_1905_Telegraph_-_polarized_relay_-_diagram.jpg (565 × 338 pixels, file size: 35 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:16, 17 August 2017 | 565 × 338 (35 KB) | Bob Burkhardt | {{Information |Description ={{en|1=Diagram to illustrate the operation of a polarized telegraph relay: ''n s'' is a hard steel permanent magnet, whose south end, ''s'', has a slit in which the soft iron armature ''a'' is pivoted. To this armature... |
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