Image:Thompson mirror galvanometer use.png
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[edit] Summary
| Description |
Drawing of a Thompson reflecting galvanometer from around 1880, showing use. 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. Tom Perera's Scientific instrument collection says this was a Model 502, made by Elliot Bros., London. It has interchangeable coils of from 150 to 5000 ohms resistance. The left drawing is from Schneider, the right from Thompson. Alterations: removed captions, rotated Schneider image so it was vertical, scaled Thompson image by 0.60, combined images. |
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| Source |
Downloaded from Norman H. Schneider (1913) Electrical Instruments and Testing, Spon & Chamberlain, New York, p.13 fig.8 and Thompson, Sylvanus P. (1881) Elementary Lessons in Electricity and Magnetism, MacMillan, London, p.169, fig.91 on Google Books |
| Date |
1913 and 1881 |
| Author |
Norman Hugh Schneider and Sylvanus P. Thompson |
| Permission (Reusing this image) |
Public domain - authors died more than 70 years ago |
[edit] Licensing
 |
This image (or other media file) is in the public domain because its copyright has expired. This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.
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File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:41, 12 December 2007 | 1,215×614 (65 KB) | Chetvorno | (== Summary == {{Information |Description=Drawing of a Thompson reflecting galvanometer from around 1900. 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) |
