The Falcon MA641 is named a Dormitory lock but its function is the same as the Schlage L9480.
Latch bolt by knob/lever inside and key outside.
Inside knob/lever free.
Outside knob/lever rigid. Dead bolt by key outside or T-turn inside.
Rotating inside knob/lever retracts both bolts.
Deadlocking latch. Inside knob/lever is always free for immediate egress.
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