| 摘要 |
A control device for a pair of flashing airport runway end identification lamps which automatically shuts down both lamps when either lamp ceases to flash, and thereby avoids the pilot confusion which could result from a single flashing lamp. This device monitors the surges of line current which flow due to flashing of the lamps and compares a signal, which varies according to the magnitude of the surges, with a threshold, and, if the comparison indicates that both lamps are not flashing, automatically disconnects the power to both lamps.
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