Entrance/office lock with automatic unlocking: Key cylinder outside; thumbturn inside; latchbolt and deadlocking auxiliary latch. Latchbolt retracted by lever from either side. Outside lever is made inoperative by key outside or by turning inside thumbturn. Key outside unlocks outside lever and retracts latchbolt. Rotating inside thumbturn unlocks outside lever; turning inside lever retracts latchbolt and unlocks outside lever; closing door also unlocks preventing lock-out. Inside lever always free for immediate egress.
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