Latchbolt operated by knob/lever
from either side unless outside is
made inoperative by key outside or by
turning inside thumbturn. When
o u t s i d e i s l o c k e d , l a t c h b o l t i s
retracted by key outside or by knob/
lever inside. Auxiliary latch deadlocks
latchbolt when door is closed. Inside
k n o b / l e v e r i s a l w a y s f r e e f o r
immediate egress.