The plasma arc chamber is made in part of a one piece base fabricated from 95. The optical scanning probe is detachably connected to the observation device. The AE uses a decaying current pulse generator that generates a decaying current pulse at the beginning of each write-to-read mode transition. The reinforcing members are disposed laterally inward from the lateral outermost end of the flywheel in a space between the engine and each of the side members. Upon entry of corresponding retrieve data into the CPU and the CPU determining that there is a \u201cmatch\u201d between the insert data and retrieve data the electric lock is operated by the CPU to permit access to the secure space within the container and retrieval of the article or articles therein.