Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1997-08-21
1999-04-20
Paladini, Albert W.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307326, 361 62, 361 63, 361 64, H02H 304
Patent
active
058959882
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.
REFERENCES:
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patent: 5412528 (1995-05-01), Mader et al.
patent: 5563455 (1996-10-01), Cheng
patent: 5565714 (1996-10-01), Cunningham
Beyda William J.
Kozdon Peter
Shaffer Shmuel
Paladini Albert W.
Siemens Business Communication Systems, Inc.
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