| 摘要 |
An automatic door latch has a case with a bolt movable within the case between a fully extended position in which the bolt extends forwardly of the case, a fully retracted position in which the bolt is within the case, and a partially extended position in which the bolt is positioned to contact a door strike. There is a spring which urges the bolt toward the fully extended position. There is a bolt operator for moving the bolt, against the spring, from the fully extended position toward a retracted position. There is a release mechanism which holds the bolt in the partially extended position and which is effective to release the bolt for movement, under urging by the spring, to a fully extended position, from the partially extended position, upon inward movement of the bolt when it is in the partially extended position.
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