C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
309/85
C21D 1/40 (2006.01) C21D 9/60 (2006.01) C21D 9/62 (2006.01) H01F 27/00 (2006.01) H05B 3/00 (2006.01) H05B 3/10 (2006.01) H05B 3/34 (2006.01)
Patent
CA 1310054
ABSTRACT An apparatus for continuous-direct-resistance heating of works such as long-length articles comprises roll electrodes disposed along a feeding path to contact the travelling work. An annular tranformer in which the work passing through is disposed between the roll electrodes; and conductive members with sufficiently less electrical resistance than that of the work is located between the roll electrodes disposed on the periphery of the transformer with the both ends thereof connected to the roll electrodes through a slider. A current is induced in the work with the conductive members as the retrace, which efficiently heats the work, having a higher resistance, without affecting other areas. If the apparatus comprises three roll electrodes, two transformers are used and conductive members are disposed on the periphery of each transformer and connected to the neighboring roll electrodes, and the power is fed to each transformer from two single-phase transformers in the Scott connection with a three- phase power supply.
562162
Fetherstonhaugh & Co.
Neturen Company Limited
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