| 摘要 |
A lock assembly is provided which has particular utility in hotels and motels, or other places where a change of occupancy frequently occurs. The lock to be described has approximately the same shape and size as the usual prior art door locks, so that it may readily be mounted in existing doors to replace existing locks. The lock includes a removable logic element which serves to change the lock for each change of occupancy. In addition, logic elements are provided, which are independent from the first-mentioned logic element, and which permit the lock to be operated by other keys, such as a maid's key or a master key, each of which is independent from the others, and each of which operates independently of the others. A latching mechanism is provided, which may be manually operated from inside the door by the occupant of the room, to restrict operation of the lock to one key only, for example, the master key, when privacy is desired. In the embodiment to be described, the lock includes a plurality of tumblers which are mounted on separate coaxial carriers which are turned relative to one another as the keys operate the lock.
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