Digitally programmed microwave oven
US4177369A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Jan 26, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/21136
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digitally programmed microwave oven having a microwave generator energized by a high voltage power supply connected to an alternating current source through mechanically actuated oven door interlock switches, with the power supply regulating the current supplied to the microwave generator to compensate for peak voltage variations in the alternating current source by resonating the output of the power supply in the region of the frequency of the alternating current source in which the power supply is initially energized by a semiconductor switch actuated by a computer to accurately control the time of initial supply of power to said power supply at a point which minimizes the input current surge to said resonant circuit by actuating said semiconductor switch at a time substantially .pi./2 radians of said frequency after the zero voltage point of said alternating current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.