Abstract: A locking apparatus for a moveable component of an aircraft seat. The locking apparatus includes a housing for being slidably received in a track, a first pair of opposed cams pivotally mounted in the housing, and a release member. The cams are moved between a lock position where the cams prevent the housing from sliding within the track and a release position. The release member is selectively moveable between a first position where the cams are maintained in the lock position and a second position where the cams are maintained in the release position.

Abstract: A compact electronic projector has a display assembly, such as a liquid crystal display panel and associated Fresnel lenses, which is mounted inside the projector body so as to rotate between a storage position in which the display assembly is generally parallel with the projection axis of the device, and a deployed position in which the display assembly is disposed at an oblique angle (such as 90.degree.) with respect to the projection axis. The assembly can thus be rotated to occupy the voids needed for expansion and contraction of the optical beams when the projector is in use, which voids have no useful function when the projector is not in use, and are thus available for component storage. This feature enables saving of a substantial volume of space, making the closed unit compact and easily transported.