Glazing
First Claim
1. A glazing comprising:
- a ply of glazing material having a surface;
a sensor for sensing a voltage modulated by damage to the ply of glazing material, said sensor at least partially circumscribing the ply of glazing material; and
a surface contact bonded to the surface configured with a portion of the sensor to form a capacitive coupling for transferring AC signals, said surface contact being tuned to receive the AC signals in a frequency range for sensing electrical discontinuity in electrical devices on the glazing.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
15 Claims
-
1. A glazing comprising:
-
a ply of glazing material having a surface; a sensor for sensing a voltage modulated by damage to the ply of glazing material, said sensor at least partially circumscribing the ply of glazing material; and a surface contact bonded to the surface configured with a portion of the sensor to form a capacitive coupling for transferring AC signals, said surface contact being tuned to receive the AC signals in a frequency range for sensing electrical discontinuity in electrical devices on the glazing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A crack detector comprising:
-
a glazing comprising a ply of glazing material having a surface, a sensor for sensing a voltage modulated by damage to the ply of glazing material, said sensor at least partially circumscribing the ply of glazing material, and a surface contact bonded to the surface configured with a portion of the sensor to form a capacitive coupling for transferring AC signals, said surface contact being tuned to receive the AC signals in a frequency range for sensing electrical discontinuity in electrical devices on the glazing; and an electronics module, wherein the voltage modulated by damage to the ply of glazing material is detected at the surface contact by the electronics module and compared with at least one reference value.
-
Specification