Electric heating – Metal heating – Of cylinders
Patent
1976-05-10
1978-03-28
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
174 35MS, H05B 906
Patent
active
040816478
ABSTRACT:
An energy seal for a microwave oven including resilient and conformable primary and outboard seals encompassing a choke type secondary seal. The composite seal is particularly suited to "wide gap" configurations in that the resilient elements thereof are adapted to fill the gap, conforming to a wide range of gap and oven door fit tolerances. The primary seal is capacitive in nature and includes a woven metal mesh inner cylinder surrounded by a woven fiberglass dielectric cover, the arrangement tending to oppose compression thereby to fill the gap when compressed by closing of the oven door. The choke seal comprises a cavity of predetermined depth having an aperture into the gap; the effectiveness of the choke is increased by the outboard seal which presents a very small impedance to the transmission path formed in the gap following the secondary seal. The outboard seal may be a capacitive seal similar to the primary, or a metal to metal contact seal.
REFERENCES:
patent: 3260832 (1966-07-01), Johnson
patent: 3629537 (1971-12-01), Haagensen
patent: 3668357 (1972-06-01), Kobayashi
patent: 3736399 (1973-05-01), Jarvis
patent: 3812316 (1974-05-01), Milburn
patent: 3846608 (1974-11-01), Valles
patent: 4013861 (1977-03-01), Westfall
How Amana Keeps Oven Leakage to a Micro-Trickle, Appliance Manufacturer, 9-70, 6-12-74.
Grimley Arthur T.
Richter David J.
Roper Corporation
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