Switching circuit controlling multiple heating elements

Details Switching circuit controlling multiple heating elements Switching circuit controlling multiple heating elements

2011-01-11

2011-01-11

Van, Quang T (Department: 3742)

Electric heating

Capacitive dielectric heating

Specific heating application

C219S626000, C363S049000

Reexamination Certificate

active

07868275

ABSTRACT:
A switching circuit including a plurality of heating elements (12), each connected as part of a tuned circuit (36), the tuned circuits being respectively tuned to different frequencies and connected in parallel between two common conductors (34), the circuit further including a device (20, 38, 40) for applying an oscillating signal voltage between the two common conductors, at one or more frequencies each corresponding to a tuned frequency of one of the tuned circuits.

REFERENCES:
patent: 4370703 (1983-01-01), Risberg
patent: 5594215 (1997-01-01), Jeng
patent: 6958898 (2005-10-01), Ries et al.
patent: 1363937 (2002-08-01), None
patent: 442283 (1934-07-01), None
patent: 577169 (1942-05-01), None
patent: WO 2005/050585 (2005-06-01), None
Office Action in Chinese Patent Application No. 200610143291.5 dated May 10, 2010.

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