Electric heating – Metal heating – Of cylinders
Patent
1981-04-20
1982-10-19
Reynolds, B. A.
Electric heating
Metal heating
Of cylinders
219 1057, 219 1075, 148108, 148121, 148154, 29609, H05B 640, C21D 104
Patent
active
043552218
ABSTRACT:
A magnetic core is disclosed herein along with associated electrical coils which together with the core form part of an overall electrical inductive apparatus such as a transformer. The core itself is one which is initially formed from a continuous strip of amorphous metal wound about itself to form a closed loop of adjacent laminations. Thereafter but before the core is annealed causing it to lose its ductility and flexibility, one section thereof is provided with a joint which is flexed open to receive the electrical coils. Once the coils have been suitably assembled around the core, the latter is annealed by means of induction heating. More specifically, one of the coils is energized at a relatively high frequency for inducing a current through the core sufficient to heat the latter to satisfactory annealing temperatures for a prescribed period of time.
REFERENCES:
patent: 2002696 (1935-05-01), Kelsall
patent: 2688573 (1954-09-01), Lee et al.
patent: 4116728 (1978-09-01), Becker et al.
patent: 4236230 (1980-11-01), Thompson
patent: 4281234 (1981-07-01), Dohogne
Electric Power Research Institute Inc.
Leung Philip H.
Reynolds B. A.
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