Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2006-04-04
2006-04-04
Hoang, Tu (Department: 3742)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S452110, C219S486000, C219S492000
Reexamination Certificate
active
07022949
ABSTRACT:
A multiple-zone power control system for controlling electric heating elements, including a power control unit having multiple control zones, a touch-sensitive function key, and a touch-sensitive on/off key for activating and deactivating one of the control zones. When all of the control zones are deactivated, the touch-sensitive key must be touched for at least a cold start duration in order to activate the designated control zone. Alternatively, the designated control zone is prevented from being activated if the touch-sensitive function key is touched while the touch-sensitive on/off key is being touched. The control system also includes two power controllers connected by a communication bus. When one of the power controllers initiates a lockout condition, the other power controller initiates a corresponding lockout condition. Multiple heating elements can be controlled together using a single set of control keys. A element size key toggles between different combinations of heating elements to control.
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Electrolux Home Products, Inc,.
Hoang Tu
Pearne & Gordon LLP
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