File:Britannica Organ Roller Board.png

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Britannica_Organ_Roller_Board.png (610 × 386 pixels, file size: 8 KB, MIME type: image/png)

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English: Drawing of a "roller board" from a pipe organ. A roller board is general mode of shifting movements sideways. The roller is a slip of wood, or a bit of metal tube, which turns on two pins inserted into its ends. It has two arms projecting at right angles to its length. One of these receives

the pull at one point, the other gives it off at another. In case a

pull has to be transmitted to more than one quarter, a roller will sometimes have more than two arms.
Date
Source Encyclopædia Britannica, 11th ed., Vol. 20, p. 261
Author Robert Holford Macdowall Bosanquet
Permission
(Reusing this file)
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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current12:48, 2 September 2009Thumbnail for version as of 12:48, 2 September 2009610 × 386 (8 KB)Bob Burkhardt (talk | contribs){{Information |Description={{en|1=Drawing of a "roller board" from a pipe organ. A roller board is general mode of shifting movements sideways. The roller is a slip of wood, or a bit of metal tube, which turns on two pins inserted into its ends. It has

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