File:Thomson mirror galvanometer.jpg
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Summary
| Description | Drawing of a Thomson reflecting galvanometer from around 1900. Tom Perera's Scientific instrument collection says it was Model 502, made by Elliot Bros., London. The vertical tube contains a fine silk fiber, which suspends a 1/2 in. mirror with small magnets on its back, seen in window, in the center of a coil of wire. A light beam reflected from the mirror lands on a scale and serves as a pointer. It has interchangeable coils of from 150 to 5000 ohms resistance. Alterations: removed caption, rotated image so it was vertical. |
| Date | |
| Source | Downloaded from Norman H. Schneider (1913) Electrical Instruments and Testing, Spon & Chamberlain, New York, p.13 fig.8 on Google Books |
| Author | Norman Hugh Schneider |
| Permission (Reusing this file) |
Public domain - published in USA before 1923 |
| Other versions |
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Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:56, 11 December 2007 | | 526 × 1,030 (34 KB) | Chetvorno | {{Information |Description=Drawing of a Thompson reflecting galvanometer |Source=Downloaded from [http://books.google.com/books?id=ZZ83AAAAMAAJ&pg=PA13&sig=v31U_QMaInWIfs6Q2g7aSCtkHrQ Norman H. Schneider (1913) ''Electrical Instruments and Testing'', Spon |
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