Glazing
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United States of America Patent
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Sep 19, 2017
Issued Date -
N/A
app pub date -
May 29, 2014
filing date -
May 29, 2013
priority date (Note) -
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Abstract
A glazing having a device for detecting a crack in the glazing comprises a sensor, substantially circumscribing a ply of glazing material. A surface contact, bonded to the glazing, is configured with a portion of the sensor to form a capacitive coupling for transferring AC signals in a frequency range. Preferably the sensor is frangible and voltage may be applied by a second surface contact. Alternatively, the glazing further comprises an electrically resistive element, such as a coating for heating the glazing, and voltage may be applied to the sensor by a spur from a busbar such that damage to coating, busbar or sensor resulting in arcing is detectable at the surface contact. An electronics module attached to the surface contact generates an alarm.
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