| 摘要 |
Covers a fire extinguisher for use on aircraft. The fire extinguisher includes a container equipped with mechanism for signalling the pilot in the cockpit in the event that the fire extinguishing fluid has been discharged through the safety relief valve of the container. The fire extinguisher is equipped with a thermally responsive material, which is positioned on or adjacent to the surface of the container and is electrically conductive. The material melts when its temperature reaches a predetermined value. The material is wired to the cockpit of the aircraft and the circuitry includes an indicating device, such as a lamp, to indicate instantly to the pilot that the fire extinguisher has been discharged and that, therefore, the fire extinguisher is not suitable for extinguishing a fire.
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