LOCKING ARRANGEMENT FOR DEADBOLT LATCH LOCKS, ESPECIALLY FOR HOTEL GUEST ROOM DOORS

摘要

An inside turn knob is equipped with an axially movable coupling member spring pressed to position coupling the knob to a deadbolt operating cam. A guest key inserted into an outside tumbler cylinder will press the coupling member to release position so that the key when rotating a latchbolt operating cam and the turn knob will not rotate the deadbolt cam. A manager's key is relatively short and will not depress the coupling member, and therefore can rotate the deadbolt cam along with the latchbolt cam.