Indicating device and method for operating such a device
US6797297B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Feb 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/746
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical cooking appliance has at least one cooktop with cooking zones becoming hot in a switched-on state, an optical residual heat indicator indicating hot cooking zones when line voltage is applied to the cooking appliance, a counter system switching off the residual heat indicator with a time delay after the switching-off of the cooking appliance connected to line voltage occurs, and a line voltage detector for detecting a presence of the line voltage at the cooking appliance. Information is stored in a memory of the counter system as long as a counter reading is greater than zero, and, after a line voltage interruption, the residual heat indicator remains activated for a certain period of time, in dependence on the inquired memory content, if the information in the memory indicates a counter value greater than zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.