Electric heating – Microwave heating – With control system
Patent
1996-07-25
1998-03-17
Leung, Philip H.
Electric heating
Microwave heating
With control system
219715, 219720, H05B 102
Patent
active
057289972
ABSTRACT:
An apparatus for controlling power of a microwave oven is disclosed in which the control thereof is easy and stable, and long-term durability is improved. The apparatus includes a control knob having a knob shaft to be inserted through a hole on a control panel, a coupler fixedly secured to the control knob shaft through the hole to be rotatably installed on the control panel together with the control knob, an annular projection integrally formed on one side of the coupler having several V-grooves formed along the peripheral surface of the annular projection, a resilient member, for instance, a wire or leaf spring, having a protrusion at a mid-position thereof, and a pair of pins for mounting the resilient member on the control panel. While controlling the power of the oven, the protrusion of the wire or leaf spring slides on the peripheral surface of the annular projection with resilient contact thereon, or remains resiliently fitted to any one of the V-grooves of the annular projection.
REFERENCES:
patent: 5349164 (1994-09-01), Ohta
patent: 5455403 (1995-10-01), Kim et al.
patent: 5548104 (1996-08-01), Ko
patent: 5558796 (1996-09-01), Cho
patent: 5607611 (1997-03-01), Lee
Kang Heung-Dae
Kim Sang-Jin
Daewoo Electronics Co. Ltd.
Leung Philip H.
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