Electrically operated control device and system for a microwave oven
US4755646A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Jul 9, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/6452
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically operated control device and system for a microwave oven are provided, the device comprising a microprocessor for operating the power unit of the oven at various selected power levels thereof, a first selector unit electrically interconnnected to the microprocessor for selecting a desired power level that the microprocessor is to operate the power unit, and a second selector unit electrically interconnected to the microprocessor for selecting a desired time period that the microprocessor is to operate the power unit at the desired power level thereof, the first and second selector unit each comprising a rotary switch unit that is electrically interconnected to the microprocessor in such a manner that the respective rotary switch unit always selects the same set sequence of said selection settings for the microprocessor as said respective rotary switch unit is rotated in one direction from a beginning position thereof that selects a first selection of the sequence to an ending position thereof that selects a last selection of the sequence, the beginning position of each rotary switch unit always being the position where that respective rotary switch unit was last set …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.