File:Britannica Dynamometer 1.jpg

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Britannica_Dynamometer_1.jpg (283 × 302 pixels, file size: 20 KB, MIME type: image/jpeg)

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English: The principle of the compensating brake devised by J. G. Appold (1800-1865) is shown. A flexible steel band, lined with wood blocks, is gripped on the motor fly-wheel or pulley by a screw A, which, together with W, is adjusted to hold the brake steady. Compensation is effected by the lever L inserted at B. This has a slotted end, engaged by a pin P fixed to the framing, and it will be seen that its action is to slacken the band if the load tends to rise and to tighten it in the contrary case. The external forces holding the brake from turning are W, distant R from the axis, and the reaction, W1 say, of the lever against the fixed pin P, distant R1 from the axis. The moment of W1 may be positive or negative. The torque T at any instant of steady running is therefore {WR ± W1R1}.
Date
Source Encyclopædia Britannica, 1911
Author Encyclopædia Britannica, Volume 8, Slice 9., available freely at Project Gutenberg

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Public domain 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.
Public domain 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.

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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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current11:21, 19 February 2011Thumbnail for version as of 11:21, 19 February 2011283 × 302 (20 KB)Keith Edkins (talk | contribs)=={{int:filedesc}}== {{Information |Description={{en|The principle of the compensating brake devised by J. G. Appold (1800-1865) is shown. A flexible steel band, lined with wood blocks, is gripped on the motor fly-wheel or pulley by a screw A, which, toge

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