. Journal. an arranpement is placedfor cleaning the filter frames. The appara-tus is an automatic filter press for dealing withmixturts contaminp less than 90; of water. Itconsists of a cylinder with reciprocating pistonwhich exerts a pressure on the introduci-d material,regulated bv an adjustable cover on the pressuretube which forms an ext-cnsion of the the backward stroke of the piston thecylinder is charged with material from a hopper;in the forward stroke this material is pushed up intothe pr.^ssure tube where it is subjected to agraduallv increasing pressure ?with
. Journal. an arranpement is placedfor cleaning the filter frames. The appara-tus is an automatic filter press for dealing withmixturts contaminp less than 90; of water. Itconsists of a cylinder with reciprocating pistonwhich exerts a pressure on the introduci-d material,regulated bv an adjustable cover on the pressuretube which forms an ext-cnsion of the the backward stroke of the piston thecylinder is charged with material from a hopper;in the forward stroke this material is pushed up intothe pr.^ssure tube where it is subjected to agraduallv increasing pressure ?with every stroke ofthe piston, falling out at the end in a soUd formon to a conveyor.—J. F. B. UUlisalion of Etna lava in the chemical iSee VII. PATEaJTS. Separation of solid sidjstanccs from liquids ; Centri-fugal machines for the . B. A. Sturgeon, Uangollen, Wales. Eng. Pat. 7019, May 10, 1915. In apparatus of the type described in 24,038 of 1913 (this J., 1915, 263), liquid is. admitted by the hollow shaft, 4, and passes by theopenings, 3*, in the rotating member, 2, 3o, 3,to the outer casing, 6, and finally escapes by theoutlet, 8, which is nearer to the axis than in theformer patent, thus reducing the outflow velocityand consequently the power used. An additionaljoint between the fixed and rotating parts maybe formed by the rib, 31, and the flange, (>. Thepres-sure liquid admitted by the pipe, 9, to liftthe plate, 3, and allow the discharge of solid matteras in the former patent, may escape tangentiallyby a valve. 10, in a direction opposite to that ofrotetion.—W. F. F. Dri/ing. heating, cooling, or ventilating ; Apparatus for . T. G. Marlow, Strealliam, and The Pulsometcr Ensrineering Ltd., Pat. 12,988. , ;. The movement of the gas or air thro\jgh theapparatus described in Eng. Pat. lt).2!9 of 1911(this J., 1912, 909) is regulated, or the directionis reversed, by a rot-ary conti-oller driven by avariable speed
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
