Safety system for an electronic device having multiple power inputs
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United States of America Patent
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Apr 20, 1999
Grant Date -
N/A
app pub date -
Aug 21, 1997
filing date -
Aug 21, 1997
priority date (Note) -
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Abstract
A safety system for electronic devices having multiple power inputs includes dedicating a different power detector to each power input and includes disabling all of the power inputs upon detection that one input has been disabled. Each of the power inputs is typically a power cord that provides electrical energy to a discrete electrical circuit. Thus, the safety system permits the electronic device to use a different power supply for each electrical circuit, while ensuring that there is no erroneous assumption that disconnecting one of the power cords will de-energize the entire electronic device. In the preferred embodiment, the paths to the power supplies are disabled by opening relay switches, with the switches that are specific to a power cord being in a logical AND arrangement.
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