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Britannica_Dynamometer_1.jpg(283 × 302 пкс, размер файла: 20 КБ, MIME-тип: 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}.
Дата
Источник Encyclopædia Britannica, 1911
Автор 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.
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текущий11:21, 19 февраля 2011Миниатюра для версии от 11:21, 19 февраля 2011283 × 302 (20 КБ)Keith Edkins=={{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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