Appliance with a controllable protection device
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United States of America Patent
Stats
-
Dec 28, 2010
Grant Date -
Aug 28, 2008
app pub date -
Feb 26, 2008
filing date -
Feb 26, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An appliance with a hazardous device contains a first controller controlled by a first control element which, in turn, is controlled by a second controller by use of a first switching element. An electrically controllable protection device is provided and is controlled by a second control element, it is possible to deactivate the protection device. A storage capacitor is provided between the first and the second control element and supplies the second control element with energy for a control pulse and is charged by the first control element when the first controller is switched off and is discharged by the first switching element when the first controller is switched on. This circuit generates a safe control circuit. In the event of a possible hazardous state, either the first controller is no longer supplied with energy or the protection device cannot be deactivated, and so danger to a user is precluded.
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Family
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