Electric heating – Metal heating – Of cylinders
Patent
1976-02-26
1977-06-07
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
219 1055R, H05B 906
Patent
active
040285197
ABSTRACT:
A combined microwave-thermal range including an oven cavity and lower storage space, the bottom wall of the oven cavity having a generally central opening. A microwave module including a microwave power supply housing enclosing a magnetron and blower, and of generally rectangular shape, is arranged horizontally and extending crosswise seated in the back of the storage space. The module includes a waveguide of rectangular cross section having its rear end secured to the top of the housing and having its front end extending forwardly, cantilever-fashion, under the bottom wall of the cavity, with the outlet of the waveguide in alinement with the central opening. A hollow open-ended conductor extends through the opening with a rotated antenna element centered therein for coupling microwave energy from the waveguide to the cavity, the hollow conductor being readily disengageable and retractable from the waveguide from inside the cavity to permit removal of the module intact by drawing it forwardly through the storage space for replacement by a "new" module when servicing becomes necessary. Blower air from the magnetron passes through the waveguide and into the cavity; however, when the blower and magnetron are turned off, air passing through the power supply housing and waveguide flows upwardly by natural convection into the cavity, escaping through a vent located at the top of the cavity. A trough-shaped shield under the waveguide protects the waveguide and antenna drive elements from impact by articles introduced into the storage space and conducts cooling air.
REFERENCES:
patent: 2860026 (1958-11-01), Long
patent: 2961520 (1960-11-01), Long
patent: 3172987 (1965-03-01), Fitzmayer
patent: 3377562 (1968-04-01), Staats
patent: 3823295 (1974-07-01), Simon et al.
patent: 3962561 (1976-06-01), Maitenaz
De Weese Raymond Paul
Kumpfer Beverly D.
Grimley Arthur T.
Roper Corporation
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