Conductive polymer circuit protection devices having improved electrodes
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United States of America Patent
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Aug 4, 1987
Grant Date -
N/A
app pub date -
Mar 14, 1985
filing date -
Mar 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Circuit protection devices which contain PTC conductive polymer elements and which are used in situations in which the device is mounted onto, or itself comprises, a rigid wall which is spaced apart from the PTC element and through which the electrodes pass. The behavior of the device can be adversely affected if the electrodes, which are prevented from moving by the rigid wall, prevent the PTC element from expanding to the extent necessary to provide the desired PTC effect. The invention includes the use of specially designed electrodes which lessen the danger that the PTC element, when it is tripped, is prevented from expanding to the extent necessary for effective operation.
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