Electric heating – Metal heating – Of cylinders
Patent
1983-04-11
1986-05-20
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 85, 219 1057, 219 1079, 148145, 148154, 266129, H05B 640
Patent
active
045903468
ABSTRACT:
The invention relates to a method of heating a piping arrangement and a heating coil used in the heating process by heating pipes through a high frequency wave induction. A spacing between the pipe outer surface and the heating coil is varied in compliance with a change in configuration of the heating coil. According to the invention, even if the coil configuration is particularly changed, it is possible to heat the pipes uniformly to obtain a uniform temperature distribution.
REFERENCES:
patent: 2182819 (1939-12-01), Pisarev
patent: 2352332 (1944-06-01), Limpel
patent: 2692322 (1954-10-01), Bennett
patent: 2706234 (1955-04-01), Macy
patent: 3230337 (1966-01-01), Viart
patent: 3827275 (1974-08-01), Suttan et al.
patent: 4012616 (1977-03-01), Zelahy
patent: 4505763 (1985-03-01), Sugihara et al.
Ikegami Tsukasa
Sugihara Isao
Hitachi , Ltd.
Leung Philip H.
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