| 摘要 |
A key ring 160 is attached by a lanyard to part of an air craft. Upon the air crew ejecting a leash retains the pull pin 120 within the air craft to remove the pin from the housing 140. This activates a personal locator beacon. Removal of the pin 120 allows a plunger switch extending upwardly from the locator beacon to be released to activate the beacon. A shoulder is provided internally in the housing which prevents the pin from being inserted into the housing from the wrong direction. Alternatively, the same object may be achieved by means of closing off one end of the slot into which the pin fits, or other means on the housing, on the pin or on the beacon. |
