Electric heating – Metal heating – Of cylinders
Patent
1982-12-06
1984-07-31
Envall, Jr., Roy N.
Electric heating
Metal heating
Of cylinders
H05B 672
Patent
active
044632398
ABSTRACT:
An excitation system for a microwave cooking appliance which employs a low profile rotating disk to enhance time-averaged uniformity of energy distribution within the resonant cooking cavity. A rectangular waveguide couples energy from the magnetron to the cooking cavity. A circular opening is formed in a common wall between the waveguide and the cooking cavity, which opening is essentially blocked by a rotatable metallic disk overlapping the opening on the cavity side of the wall. An elongated radiating slot is formed on the disk for coupling energy from the waveguide to the cooking cavity extending generally transverse to the radius of the disk. The axis of rotation of the disk is longitudinally spaced an odd integral multiple of quarter guide wavelengths from the short circuit termination of the waveguide, and the longitudinal axis of the radiating slot is radially spaced approximately one quarter guide wavelength from the axis of rotation of the disk, thereby orienting the slot alternately as a series slot at a maximum wall current point and a shunt slot at a maximum field point with each quarter revolution of the disk. During each complete rotation of the disk, the slot passes through four maximum energy coupling positions with less optimum coupling positions interspersed therebetween, thereby enhancing time-averaged energy distribution uniformity in the cavity by periodically varying the radiation intensity of the slot and its position in the cavity during each rotation of the disk.
REFERENCES:
patent: 2704802 (1955-03-01), Blass et al.
patent: 3436507 (1969-04-01), Puschner
patent: 3746823 (1973-07-01), Whiteley
patent: 3810248 (1974-05-01), Risman et al.
patent: 3872276 (1975-03-01), Corcoran et al.
patent: 4019009 (1977-04-01), Kusunoki et al.
patent: 4028521 (1977-06-01), Uyeda et al.
patent: 4284868 (1981-08-01), Simpson
patent: 4316069 (1982-02-01), Fitzmayer
patent: 4327266 (1982-04-01), Austin et al.
patent: 4335290 (1982-06-01), Teich
patent: 4343976 (1982-08-01), Nasretdin et al.
patent: 4424430 (1984-01-01), Almgren et al.
patent: 4430538 (1984-02-01), Suzuki et al.
patent: 4430539 (1984-02-01), Suzuki
Envall Jr. Roy N.
General Electric Company
Houser H. Neil
Leung Philip H.
Reams Radford M.
LandOfFree
Rotating slot antenna arrangement for microwave oven does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotating slot antenna arrangement for microwave oven, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotating slot antenna arrangement for microwave oven will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-187137