File:Britannica Organ Roller Board.png
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| Description |
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. |
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| Date | ||||
| Source | Encyclopædia Britannica, 11th ed., Vol. 20, p. 261 | |||
| Author | Robert Holford Macdowall Bosanquet | |||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:48, 2 September 2009 | | 610 × 386 (8 KB) | Bob Burkhardt | {{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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