Abstract: For use in a permutation lock, a combination of a bottom number and nose element and knob and dial element are provided. The knob portion of the knob and dial element defines an axially extending female recess having a plurality of formations (for example, eight flats arrayed in an octagon, or forty teeth) such as flats which are symmetrically disposed around the circumferential surface on the recess. In like manner, the nose portion of the bottom tumbler and nose element is provided with an axially extending male nose having a like number of similarly shaped surface elements adapted to fit within and snugly engage the knob and dial recess in any one of a finite plurality of angularly spaced apart positions.

Abstract: A high security lock includes a lock housing, lock cylinder and a lock core. The lock housing defines a key receiving surface and a cavity for receiving the lock cylinder. A cover plate is attached to the lock housing and is located between the lock cylinder and the key receiving surface. The cover plate covers a portion of the lock core. A retaining shield is received in the cavity, which engages the cover plate and is attached within the cylinder.

Abstract: An apparatus for molding a glass mold for subsequent molding of glass optical elements or lenses is disclosed. The apparatus comprises a master having a snout and a master ring disposed around the snout. The master and master ring may be of unitary construction and are disposed within constraining means or sleeve in an operative association with a means for exerting a force to effect molding. The apparatus also comprises a means for heating the assembly.

Abstract: A method of molding precision glass optical elements or lenses is disclosed. Precision molded glass molds are first provided which define a glass mold cavity having a predetermined desired size, shape and volume corresponding to the glass optical element. To facilitate formation of the glass optical elements, shaped and polished preforms are formed.

Abstract: A method of forming precision glass molds suitable for molding glass optical elements or lenses is disclosed. The glass molds define first and second opposed optical molding surfaces. Each master is formed by defining a master cavity adapted to form a first glass mold. A quantity of glass mold material is disposed within such cavity and molded in conformation with said master. The molding surface of each such glass mold defines an optical surface to be subsequently formed on an optical element.

Abstract: An apparatus for molding glass optical elements by means of at least one molded glass mold is disclosed. The optical element, which may be a lens and which may be formed of glass, is molded within an apparatus that comprises a pair of molds of which at least one is a molded glass mold, a constraining means and a ring disposed intermediate the molds. The interior diameter of the ring and the molding surfaces of the molds comprise the optical element molding cavity.

Abstract: Disclosed are a method and apparatus for forming a continuous length of glass article. A coating of glass particles is deposited on a mandrel having a thermal coefficient of expansion much greater than that of the glass particles. The mandrel is allowed to cool, thereby causing it to shrink and separate from the coating. The coating is indexed a discrete longitudinal distance along the mandrel, thereby uncovering a region of the mandrel. Another coating of glass particles is deposited on the uncovered region of the mandrel and over a portion of the previously applied coating. The steps of separating or freeing the coating from the mandrel, longitudinally indexing the coating with respect to the mandrel and depositing another coating are repeated. Thus, each step of indexing longitudinally translates an incremental length of a porous body from the end of the mandrel.