| 摘要 |
648,909. Gas burners. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.-GOBAIN, CHAUNY, & CIREY. Dec. 31, 1947, No. 35345. Convention date, May 31, 1946. [Class 75(i)] [Also in Group XXIII] A heating device for converting glass into fibres comprises a stationary mixing chamber 18 extended into a narrow annular passage 19 through which a combustible mixture is fed into a hollow lenticular centrifuge 1 forming a combustion chamber, the burnt gases being evacuated through outlets 24; the molten glass 22 flows down through the central passage 21 into the centrifuge and as it escapes by orifices 2 is subjected to a hot blast of combustion products directed across its path of projection by a continuous slot or series of holes 7 forming the expansion orifice of an annular combustion chamber 6 fed with a combustible mixture and whose hollow walls are air cooled. Another form of heating device is also described wherein a lenticular centrifuge similar to that shown at 1 is enclosed within a correspondingly shaped stationary outer casing spaced therefrom sufficiently to allow an axially fed combustible mixture to pass outwardly towards a peripheral expansion orifice through which the combustion products resulting from ignition within the interspaces are evacuated, carrying with them and attenuating the glass filaments issuing from the orifices 2 : if fuel gas is fed in by one inlet (e.g. above the centrifuge) and air &c. by the other inlet (below the centrifuge), mixing and combustion then take place at the rim of the centrifuge.
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