Abstract: A data storage system comprising: a media picker displacement path having a first end and a second end; a first media picker assembly mounted in the picker displacement path; a second media picker assembly mounted in the picker displacement path; a plurality of data storage media access locations located along the picker displacement path; the first media picker assembly being displaceable along the path from the first end to a point of interfering contact with the second media picker assembly; the second media picker assembly being displaceable along the path from the second end to a point of interfering contact with the first media picker assembly; the storage system having a normal running operating mode wherein the first media picker assembly is stationarily positioned at the first end of the displacement path and the second picker assembly is selectively positionable along the remainder of the path; the storage system having a fall back running operating mode wherein the second media picker assembly is s

Abstract: A group of identical bezel plates having bilateral symmetry interchangeable, in a compound bezel assembly, with at least one other group of identical bezel plates having bilateral symmetry to produce multiple, bilaterally symmetrical, compound bezel configurations with different appearances using a minimal number of component plates; and method and apparatus for providing a venting bezel assembly with a plenum chamber formed between component plates.

Abstract: Access to a cement metering wheel for purposes of cleaning, without spilling cement from a storage tank disposed above the metering wheel, is provided by pivoting the wheel assembly downward and away from the bottom of the tank. A gate slot in the bottom of the tank is adapted to receive one or more blocking plates, prior to pivoting the wheel assembly, so as to block the gravity-feed outflow opening from the tank. Selectively removable slot covers are provided to prevent cement spillage from the open side of the slot during normal cement metering operation.