Apparatus for preventing corrosion of contact
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United States of America Patent
Stats
-
Apr 22, 2008
Grant Date -
Oct 20, 2005
app pub date -
Mar 1, 2005
filing date -
Apr 5, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus for preventing a contact from being corroded includes a power source, a signal line connected to the contact, a resistance connected to the signal line, a switching section, a comparator, and an overheat detecting section. The switching section has a switch between the power source and the signal line. An impedance of the switch is smaller than that of the resistance when the switch is turned on. The comparator compares a potential of the signal line with a predetermined potential to determine as to whether or not the contact is corroded. The comparator outputs a driving signal when the comparator concludes that the contact is corroded. The overheat detecting section detects whether or not temperature of the apparatus exceeds a predetermined temperature. The overheat detecting section decreases current flowing through the switching section when the temperature of the apparatus exceeds the predetermined temperature.
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