Microwave oven shelf

Details Microwave oven shelf Microwave oven shelf

1983-03-07

1985-04-16

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055F, H05B 664

Patent

active

045117799

ABSTRACT:
A metal rod rack shelf for a microwave oven wherein extension support rods are substantially prevented from being excited with high electric currents. The rack is embodied with quarter wavelength choking structures in the regions where the extension support rods connect to the rack mainframe. Accordingly, the effective short circuits in those regions are transformed to open circuits at a distance of one-quarter wavelength along the support rods. As a result, the support rods do not rise to high temperatures or radiate intense microwave fields that could cause melting of or arcing to microwave transparent brackets which mount to walls of the oven cavity and engage the rods.

REFERENCES:
patent: 2912554 (1959-11-01), Snyder
patent: 3936627 (1976-02-01), Fitzmayer
patent: 3949184 (1976-04-01), Freedman
patent: 4455467 (1984-06-01), Dills

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