| 摘要 |
An electrical release door strike comprising a carrier frame; a strike bolt carried by the frame for pivoting when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to the pivoting; structure carried by the frame to release the strike bolt for such pivoting, including first, second and third arms; the first arm movable from a first position blocking bolt pivoting to a second position allowing bolt pivoting to in turn allow the door opening, the second arm movable from a primary position in which it holds the first arm in the first position to a secondary position in which it allows the first arm movement to the second position, and the third arm movable from an initial position in which it holds the second arm in the primary position to a subsequent position in which it allows movement of the second arm to the secondary position; and additional structures including an element carried by the bolt and movable relative thereto to signal the presence of a door part adjacent the bolt.
|
