Fire barrier for window opening in vertical wall, comprises metal plate held above opening and allowed to swing down if fire is detected

摘要

The fire barrier comprises a metal plate (6) pivotally connected to a substantially horizontal shaft (5) and held in a substantially horizontal position above the window opening (3). A device (9) sensitive to heat and/or smoke is designed to release the plate in the event of fire, so that the plate swings down to occupy a substantially vertical position covering the window opening.