. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . Girard. Fig. 4059 represents one of Girards turbines with an open water-chamber, the partial sluice-age of which consists of aseries of vertical sluices simi-lar to those of Fontaines tur-bine explained above ; butinstead of their being allraised at once, they are raisedone after another by meansof a kind of rack and pinioncommunicating with a go-vernor placed above thewheel. Fig. 4059, A B, kind of sluice worksperfectly, and may beadapted to the act
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . Girard. Fig. 4059 represents one of Girards turbines with an open water-chamber, the partial sluice-age of which consists of aseries of vertical sluices simi-lar to those of Fontaines tur-bine explained above ; butinstead of their being allraised at once, they are raisedone after another by meansof a kind of rack and pinioncommunicating with a go-vernor placed above thewheel. Fig. 4059, A B, kind of sluice worksperfectly, and may beadapted to the action of anautomatic regulator. The objection to whichwe called attention in thecase of Fourneyrons turbinewhen the level of the back-water is variable, exists alsoin those of Eulers Girard, however, removesthis objection by clearingthe wheel of water by meansof compressed air in themanner we have before de-scribed. Fig. 4059 shows thearrangement of the hydro-pneumatic apparatus of applied to a turbinewith an open water-cham-ber. Numerous experimentshave been made to test its Girard s works on the Some of these we give in the following Table, compiled from EXPEEIMENTS MADE WITH TheEE OF GiEARDS LoW-PKESSUEE TuEBlNES, WITH PARTIAL AND Independent Sluices, and Woeking out of the Watee. Description of the Wheel. Fall. Paper Mill at Egreville(Seine-et-Marne). ¡40 fixed curves ..40 moving cm-ves\(A= 0-30) ../T = 30 horse-power underminimum fall of 1 mètre Fersian India-rubber Factory(^Seine-et-Oise). 180 fixed curves .54 moving curvesi(A=3 0-20) ../ :} 2r 1-791-63 1-60 710660 Spinning Mill of Amilly (Loiret). 2r = 3-600 .. .80 fixed curves ..60 moving curves (A 2-535 1-80 0-36), Number of Sluices open. Percentage of usefuleffect to the gross work. Working out of the water. 10 (out of 40)0-25]16 „ 0-401 20 0-50 J 24 (out of 80)0-30j32 „ 0-40l 36 0-45] /14 (out of 80) 0182430 •17 0- •22 0- •30 0^ •375 0^ -45 0^ •60 0^ -60 0^70 to0-75
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