The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . he soundboard contains the grooves which receive the windfrom the valves, and theslides by which thehandles of the stops con-trol -the transmission ofthe wind through thesoundboard to the pipesof the different stops. The grooves of thesoundboard are spacesleft between wooden barsglued on to the table ofthe soundboard. Thereis usually one groove forevery key. The groovesof the bass notes, whichhave to supply wind forlarge pipes, arc broaderthan those of the bass bars are also thicker tha
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . he soundboard contains the grooves which receive the windfrom the valves, and theslides by which thehandles of the stops con-trol -the transmission ofthe wind through thesoundboard to the pipesof the different stops. The grooves of thesoundboard are spacesleft between wooden barsglued on to the table ofthe soundboard. Thereis usually one groove forevery key. The groovesof the bass notes, whichhave to supply wind forlarge pipes, arc broaderthan those of the bass bars are also thicker than those of the treble, thatthey may the better support the gre?t weight which rests onthe bass portion of the soundboard. The table forms the top ofthe grooves. The grooves are generally closed below with Fig. 1.—A portion of the Table withthe open grooves seen from above. ORGAN 257 leather, except the opening left in each, which is closed by thekey-valve or pallet. The sliders are connected with the draw-stops or stop-handles,which are covered in with stout upper boards, on which the pipes. Fig. 2.—A section of a groove, withthe table, windchest and pallet. Fig. 3.—A section at rightangles to fig. 2. • • • V f • 1 1 1 * • * • • ? . • • * • . * • _ J . • . • • • . * 1 Fig. 4.—A portion of the tableas it appears from above, with theplaces for the sliders of the stops;the small circles show the holes forthe wind. stand. The stop-handles are pulled out, and holes are thenbored straight down through the upper boards, sliders and tableto admit the wind from the grooves to the pipes. When the slidersare shifted by pushing in the handles, the holes no longer corre-spond, and the pipes are silenced. Pipes are divided first into flue-pipes and reed-pipes. Flue-pipes are blown by a wind mouthpiece characteristic of the organ, while in reed-pipes the windacts on a metal tongue vibrat-ing on a reed, and the motionof the tongue determines thespeech of
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Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
