Abstract: The present invention relates to a flush latch locking mechanism for a door. In our experience, the locking member of prior art flush latches intended for use on doors 27 mm thick only travel a maximum distance of 7 mm. Therefore, there is very little tolerance for variation in the space between the door and door jamb if the door is to be held securely in a closed position. The present invention relates to a flush latch, locking mechanism including an operating lever and a retractable locking member that travels between a rearward retracted position and a forward advanced position. The locking member includes a cam surface having a raised portion which is engaged by the lever in operation so that the locking member can travel up to 13 mm when fitted to a 27 mm thick door.

Abstract: A multi-compartment mailbox has a master door which a mailman can open, using a first master key, to enable large packages to be delivered, and the master door has a plurality of sub-doors each enabling access to a specific one of the compartments and openable by use of a key different from the master key and different from the keys used to open the other sub-doors. Each sub-door has a mail delivery flap and all the flaps of all the sub-doors can be collectively locked and unlocked to prevent delivery of junk mail. A second master key controls the condition, locked or unlocked, of the flaps and persons, such as building management or town council officials, may also have copies of the second master key, but not the first.