Excerpt: ...New Method of Tuning Reeds Figures 31, 32, and 33 will serve to make clear the chief cause for reeds going out of tune. Figure 31 may be taken to represent a reed block, eschallot, tongue and tuning wire at rest. In this case the tuning wire will be pressing firmly against the tongue at the point B, but said tuning wire will not be subjected to any abnormal strain. Turning to Figure 32, if we use the reed knife and slightly lift the tuning wire at the point C, friction against the tongue at the point B will ...
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Excerpt: ...New Method of Tuning Reeds Figures 31, 32, and 33 will serve to make clear the chief cause for reeds going out of tune. Figure 31 may be taken to represent a reed block, eschallot, tongue and tuning wire at rest. In this case the tuning wire will be pressing firmly against the tongue at the point B, but said tuning wire will not be subjected to any abnormal strain. Turning to Figure 32, if we use the reed knife and slightly lift the tuning wire at the point C, friction against the tongue at the point B will prevent said point B from moving upward. (In this connection it must be borne in mind that the co-efficient of friction in repose is much greater than the co-efficient of friction in motion.) In consequence of the drawing up of the tuning wire at point C, and the frictional resistance at point B holding the latter steady, the lower part of the tuning wire will assume the shape shown in Figure 32, and point A will in consequence move farther away from the tongue. Now, if the reeds be left in this state and the organ be used for any length of time, it will be found that point B of the tuning wire will have risen upward until the abnormal strain upon the tuning-wire spring has been satisfied. In consequence of this, this particular note will be sounding flatter in pitch than it ought to do. Conversely, if the portion of the tuning wire lettered C be slightly driven down, as in Figure 33, the retarding effect of the friction of repose at point B will cause the lower portion of the tuning wire to approach nearer the tongue than it should do. If now this reed be left in this state, after the pipe has been used for some time and the tongue has been vibrating, it will be found that point B on this tuning wire will have traveled nearer to the tip of the tongue, in order to relieve the abnormal strain upon the lower portion of the tuning wire. Point A will then have resumed its normal position. In Figures 32 and 33, the defective action of the lower...
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Seller's Description:
Good. Size: 0x0x0; Hardcover as pictured/1969 printing/light wear and spotting to cover/owner sticker and date inside cover/text clean of marks/safe and secure shipping/FREE DELIVERY CONFIRMATION AND TRACKING ON ALL DOMESTIC ORDERS/
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Seller's Description:
Being an Account of Modern Developments. NY: Charles Francis Press, 1913. Second Edition. 191p. Halftone portraits, halftones of organs, diagrams of works. 19x13.5cm, cloth. Soiled, bit loose, G.