| 摘要 |
<p>962,010. Zone-melting. CENTRE NATIONALE DE LA RECHERCHE SCIENTIFIQUE. Oct. 10, 1961 [Oct. 14, 1960], No. 36345/61. Heading B1S. In the passage of a molten zone produced by induction heating through a rod held at each end, the width of the molten zone is maintained constant throughout its passage by means for controlling the degree of heating actuated by change in the sum of the temperatures at each end of the rod. In the case of the simultaneous passage of a plurality of molten zones, control of the outer zones only is necessary. The temperature of the ends of the rod and the molten zone may be measured by resistors, thermistors, photoelectric cells or thermocouples. The temperatures may be measured as voltages. The temperature of the molten zone may be measured by a thermocouple placed in an auxiliary solid directly subjected to the induction heating. The temperature of the molten zone may alternatively be produced as a voltage which varies directly as the heating power. As shown in Fig. 4, thermocouples 8, 9 and 10 produce a current in a potentiometer 4 and variation in the voltage effects corresponding variation in the strength of the heating means 3. Other electrical circuits are illustrated in Figs. 6-10 (not shown). Means for effecting variation in the heating means is illustrated in Figs. 11 and 12 (not shown).</p> |
