Electrical transmission or interconnection systems – Switching systems – Switch actuation
Patent
1986-02-05
1987-07-07
Scott, J. R.
Electrical transmission or interconnection systems
Switching systems
Switch actuation
200 38R, 200 38FA, 200 38B, H01H 4300
Patent
active
046789308
ABSTRACT:
A programmer timer for an appliance, such as microwave cooking oven, having a magnetron power switch positioned by a control selectively moved to one of three power level settings by user rotation of the single rotary knob to a selected position on one of three separate cooking program interval range scales on the dial. Selection of a knob position on the first scale provides a 100% magnetron duty cycle, or full "ON", cooking mode for the desired cooking interval, selection of a knob position on the second scale provides a first predetermined fractional duty cycle for "MEDIUM" power level magnetron operation for the desired cooking interval; and, selection of a knob position on the third scale provides a second predetermined fractional duty cycle for "LOW" or "DEFROST" power level magnetron operation for the desired cooking program interval. A single timing motor drives a cam advance mechanism for effecting time-out of the selected program interval for the three power levels of operation.
REFERENCES:
patent: 3417211 (1968-12-01), Wiser
patent: 3566051 (1971-02-01), Hulterstrum et al.
patent: 3596015 (1971-07-01), Jullien-Davin
patent: 4177370 (1979-12-01), Otani
patent: 4206337 (1980-06-01), Marquis
patent: 4468600 (1984-08-01), Barthel et al.
patent: 4523062 (1985-06-01), Mahon
patent: 4551590 (1985-11-01), Mahon
patent: 4560846 (1985-12-01), Klopp et al.
patent: 4577179 (1986-03-01), Chambers et al.
Eaton Corporation
Johnston R. A.
Rowe D. A.
Scott J. R.
LandOfFree
Microwave oven timer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microwave oven timer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave oven timer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1664196