File:Britannica Dynamometer 3.jpg
Britannica_Dynamometer_3.jpg (256 × 309 pixels, file size: 17 KB, MIME type: image/jpeg)
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Summary
| Description |
English: a band-brake invented by Professor James Thomson, suitable for testing motors exerting a constant torque. To maintain eμθ constant, compensation for variation of μ is made by inversely varying θ. A and B are fast and loose pulleys, and the brake band is placed partly over the one and partly over the other. Weights W and w are adjusted to the torque. The band turns with the fast pulley if μ increase, thereby slightly turning the loose pulley, otherwise at rest, until θ is adjusted to the new value of μ. This form of brake was also invented independently by J. A. M. L. Carpentier, and the principle was used in the Raffard brake. |
| Date | |
| Source | Encyclopædia Britannica, 1911 |
| Author | Encyclopædia Britannica, Volume 8, Slice 9., available freely at Project Gutenberg |
Licensing
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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This image comes from the Project Gutenberg archives. This is an image that has come from a book or document for which the American copyright has expired and this image is in the public domain in the United States and possibly other countries.
This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:29, 19 February 2011 | | 256 × 309 (17 KB) | Keith Edkins | =={{int:filedesc}}== {{Information |Description={{en|a band-brake invented by Professor James Thomson, suitable for testing motors exerting a constant torque. To maintain ''e''<sup>μθ</sup> constant, compensation for variation of μ is made by |
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