Title: Cover plate for induction heating apparatus

Abstract: An induction heating apparatus for induction-heating a heated element such as a cooking pot by an exciter which forms an alternating magnetic field excited by the standard line frequency. The apparatus comprises a cover plate made of a high resistant non-magnetic metal, preferably stainless steel, placed above said exciter to face said heated element. Preferred embodiments of the cover plate for absorbing thermal expansion include the formation of a rim between a central region (supporting surface) on which is placed said heated element and a peripheral region; formation of a circular projection or a groove projecting upwardly or downwardly at a peripheral part in said central region or formation of a curved surface in the inner region of the peripheral circular projection or groove of said central region.

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Inventors: Usami, Kazuo (Itami, JA)
Miyazaki, Masayuki (Osaka, JA)
Hizikata, Akemi (Kawanishi, JA)

Application Number: 488777
Filing Date: 1974-07-15
Publication_date: 1976-04-06
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JA)
Primary Class(es): 219/622 219/443.1, 219/621
Other Classes:
US Patent Ref:

2127426	Aug, 1938	Samuels	219/464.
2196484	Apr, 1940	Wentworth	219/464.
2422057	Jun, 1947	Weinhardt	219/459.
3275784	Sep, 1966	Merrett	219/10.
3530499	Sep, 1970	Schroeder	219/10.
3710062	Jan, 1973	Peters	219/10.
3715550	Feb, 1973	Harnden et al.	219/10.
3767896	Oct, 1973	Ryan	219/521.
3781503	Dec, 1973	Harnden et al.	219/10.
3836744	Sep, 1974	Taketo et al.	219/10.

Other Refs: 1,157,711446,410

Jul, 1969	UK
Apr, 1936	UK

Primary Examiner: Reynolds, Bruce A.
Assistant Examiner:
Attorney: Oblon, Fisher, Spivak, McClelland & Maier