| 摘要 |
A non-key operated lock for the door of an occupied room comprising a vertically elongated prop member pivotally mounted to a guide member at its upper end for oscillation about a horizontal axis for movement between a first inoperative downwardly and outwardly inclined position with the lower end of the prop member spaced above the lower marginal edge of the door and a second operative position with the lower end of the prop member swung toward the door and projecting at least slightly below the door lower marginal edge for engagement with a horizontal surface, such as a floor, over which the lower marginal edge moves when the door is moved toward the open position thereof. The prop member is yieldingly biased toward the inoperative position and an elongated tension member extends between the guide and prop member and includes opposite end portions slidably anchored to the guide and prop member for guided gravity biased movement downwardly therealong and a counter balance weight for assisting in the gravity biased movement. A first form of the invention is permanently mounted on the associated door and a second form of the invention is portable and may be quickly removably mounted on an associated door.
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