Abstract: A mold is provided having a porous metal insert through which a mold release agent can be pumped to provide a desired, precisely metered quantity or coating of the release agent at a desired location along the inner surface of a mold cavity, or at the inner surface of an injection port, between or at periodic intervals of successive moldings of parts. The need to manually apply mold release agent between successive moldings, for example to the injection port of an injection mold, is reduced, thereby reducing or substantially eliminating inconsistent applications of release agent that are characteristic of manually applied coatings. A method of molding using the disclosed porous metal insert also is provided.

Abstract: An arc tube for a ceramic metal halide lamp includes a hollow first body member (40) that is tapered along a majority of its length to aid in removing the molded component from a pin during assembly. An open end (46) of the first body member has a constant diameter (60) allowing it to be joined to a constant diameter portion (72) of the second body member or end cap (70). The mating constant diameter portions ensure that the hollow first body member can be monolithically joined with the end cap with a reduced level of seal voids.

Abstract: A discharge chamber for a lamp, the discharge chamber comprising a monolithic ceramic article having a main body defining an arc chamber and generally opposed leg members defining openings which may accommodate an electrode or electrode lead through. A method of making a ceramic discharge chamber comprising the steps of forming a mixture comprised of ceramic powder and a binder and injecting the mixture into a die and around a mold to form at least a main body of the discharge chamber.

Abstract: A discharge chamber for a lamp, the discharge chamber comprising a monolithic ceramic article having a main body defining an arc chamber and generally opposed leg members defining openings which may accommodate an electrode or electrode lead through. A method of making a ceramic discharge chamber comprising the steps of forming a mixture comprised of ceramic powder and a binder and injecting the mixture into a die and around a mold to form at least a main body of the discharge chamber.

Abstract: A mold is provided having a porous metal insert through which a mold release agent can be pumped to provide a desired, precisely metered quantity or coating of the release agent at a desired location along the inner surface of a mold cavity, or at the inner surface of an injection port, between or at periodic intervals of successive moldings of parts. The need to manually apply mold release agent between successive moldings, for example to the injection port of an injection mold, is reduced, thereby reducing or substantially eliminating inconsistent applications of release agent that are characteristic of manually applied coatings. A method of molding using the disclosed porous metal insert also is provided.

Abstract: An arc tube for a ceramic metal halide lamp includes a hollow first body member (40) that is tapered along a majority of its length to aid in removing the molded component from a pin during assembly. An open end (46) of the first body member has a constant diameter (60) allowing it to be joined to a constant diameter portion (72) of the second body member or end cap (70). The mating constant diameter portions ensure that the hollow first body member can be monolithically joined with the end cap with a reduced level of seal voids.

Abstract: A discharge chamber for a lamp, the discharge chamber comprising a monolithic ceramic article having a main body defining an arc chamber and generally opposed leg members defining openings which may accommodate an electrode or electrode lead through. A method of making a ceramic discharge chamber comprising the steps of forming a mixture comprised of ceramic powder and a binder and injecting said mixture into a die and around a mold to form at least a main body of said discharge chamber.

Abstract: An arc tube for a ceramic metal halide lamp includes a hollow first body member (40) that is tapered along a majority of its length to aid in removing the molded component from a pin during assembly. An open end (46) of the first body member has a constant diameter (60) allowing it to be joined to a constant diameter portion (72) of the second body member or end cap (70). The mating constant diameter portions ensure that the hollow first body member can be monolithically joined with the end cap with a reduced level of seal voids.

Abstract: A circular fluorescent lamp unit having a central screw-in hub containing lamp ballast means, and a plurality of support arms extending from the hub and having curved outer ends to support a circular lamp. The support arms are metal or plastic strips which enter through slots of the hub and are bent at substantially right angles within the hub so as to be held in place while having limited radial movement with respect to the hub to enable them to accommodate and support circular lamp bulbs of varying dimensions such as due to manufacturing tolerance variations.