Abstract: A control mechanism for tambour-type door closures helically wound about a winding sleeve for use in combination with cabinetry and including a worm/pinion gear combination releasably locked against free rotation, with controlled rotation of the worm facilitating adjustment of spring tension for controlled ongoing smooth operation of the tambour door closure between open and closed dispositions. The worm/pinion gear combination is coupled to a coiled spring which is helically wound about the tambour door winding spindle with one end of the coil spring being anchored to the rotatable winding spindle means, and with the other being coupled to and fixed for controlled rotational movement with the pinion component of the worm/pinion gear combination. Controlled rotatable motion of the worm is facilitated through the clutching action of the knurled end terminal of the worm gear shaft.

Abstract: A reversibly positionable shelving unit housed within a cabinet enclosure and consisting of a frame with opposed top, bottom, and intermediate supports, each with a laterally disposed support post engaging channel formed therein. An upright spine or support post is rigidly secured to and extends between the top and bottom supports, and is disposed adjacent one lateral edge surface of the supports medially between opposed front and rear edge plate surfaces, with the outer surfaces of the supports having track followers coupled thereto. Camming support means are coupled to each support, and adapted to releasably, frictionally and grippingly engage the edge of the spine to lock the shelves in cantilevered support with the spine. Matching upper and lower guide slots are formed in the enclosure for engaging the follower means, with a linear bearing secured to the lower panel and in engagement with the undersurface of the bottom-most support.