| 摘要 |
A security gate for closing a passage has a pair of panels movable translationally with respect to one another to alter the effective width of the gate. An actuating mechanism for forcing the opposite ends of the panels against the sides of the passage includes a handle mounted on one of the panels controlling a latching device operative for locking the handle in a fixed relationship with respect to the other of the panels. The latching device in accordance with one embodiment includes a rack and brake. When the latch is engaged, a cam also controlled by the handle engages the panel on which the handle is mounted to force the two panels translationally further apart so as to bear firmly against the sides of the passage to hold the gate in position.
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