Multi-layered electrical induction coil subjected to large force

Details Multi-layered electrical induction coil subjected to large force Multi-layered electrical induction coil subjected to large force

1978-03-13

1980-06-10

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1049R, 336177, H05B 518

Patent

active

042074517

ABSTRACT:
An induction coil for the treating of metal parts where the coil carries large currents and is subjected to large forces. The coil has two layers of metal, the layer nearest the metal part being made of high conductivity and the other layer being made of a metal having an electrical conductivity less than that of copper and having a Young's Modulus at least 20% greater than the Young's Modulus of the metal of the layer nearest the metal part. The layer of metal nearest the metal part has a thickness at least equal to the reference depth of the current in such metal and preferably, has a thickness from 1.5 to 10 times such reference depth. Preferably, also, the surfaces of the other layer, except possibly those relatively remote from the principal currents, are covered by the high conductivity metal having a thickness at least equal to such reference depth.

REFERENCES:
patent: Re29016 (1976-10-01), Peacock
patent: 1891481 (1932-12-01), Scofield
patent: 2572646 (1951-10-01), Menzel et al.
patent: 2596770 (1952-05-01), Groven
patent: 3088200 (1963-05-01), Birdsall et al.
patent: 3126937 (1964-03-01), Brower et al.
patent: 3258573 (1966-06-01), Morin et al.
patent: 3612806 (1971-10-01), Lewis
patent: 3755644 (1973-08-01), Lewis
patent: 3764944 (1973-10-01), Erven
patent: 3900695 (1975-08-01), Andersson et al.
Reference Depth, Tudbury, "Basics of Induction Heating", vol. 1, pp. 44-45, 1960.

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