| 摘要 |
<p>938,775. Automatic temperature control systems. KOKUSAI DENKI KABUSHIKI KAISHA. April 21, 1961 [April 21, 1960], No. 14578/61. Class 38 (4). A system for automatically controlling the temperature of a material 2 in a heating bath 1 comprises a number of pairs of electrodes 3, 3a ; 4, 4a; 5, 5a of differing lengths immersed in the material 2, the electrode pairs being supplied from separate windings A, B, C of a transformer T, thermo-couples 6, 7, 8 responsive to the temperature of the material 2 in the zones associated with the different pairs of electrodes being provided to interrupt the supply to the electrode pairs by way of circuit breakers 12, 13, 14 and auxiliary relays 9, 10, 11 when the temperature of the material in the different zones reaches a desired value. Thus the material is heated to a common temperature throughout its mass. The material may be powdered carbon made fluid by the passage of air therethrough.</p> |
