A colour switching fault indicator

Details A colour switching fault indicator A colour switching fault indicator

G - Physics

01

R

G01R 31/02 (2006.01) G02F 1/1333 (2006.01) G02F 1/135 (2006.01) G02F 1/137 (2006.01) H01H 71/04 (2006.01) H01H 85/30 (2006.01) G02F 1/1334 (2006.01) H01H 85/32 (2006.01)

Patent

CA 2136024

2136024 9422159 PCTABS00033 A polymer stabilized cholesteric textures wafer (12) is sandwiched between two electrode plates (20, 24), one of which is transparent. Terminals (26, 28) are provided for connection in parallel with a circuit protection device of an AC circuit. If the circuit protection device opens circuits, AC is supplied to the electrodes (18, 22) across the polymer wafer (12). This drives the wafer (12) to a reflecting state wherein it is coloured. This reflecting state may be viewed by an observer through the transparent electrode.

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