| 摘要 |
An unlocking device for a supplemental door lock of the ball hook and U-shaped catch type is disclosed. The unlocking device consists of a thin elongated resilient member. The resilient member is designed to engage the perpendicular corner formed by the standard door stop and associated door jamb. The resilient member has a resilient integral compression recoil arm that exerts force on the U-shaped catch as the door is closed. Upon closing the door, the resilient member causes the U-shaped catch to release the ball hook.
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