| 摘要 |
<p>An electrical release door strike comprising a carrier frame; a trike bolt carried by the frame for movement when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to bolt movement; a solenoid carried by the frame to have either of two alternate positions relative to the frame; and structure operatively connected between the solenoid and bolt in either of the positions to cause the bolt to assume i) a fail safe condition when the solenoid is in one of the positions, ii) a fail secure condition when the solenoid is in the other of the positions.</p> |
