Abstract: A luminaire housing transfers mechanical loads and stresses imparted by an electrical power supply through a bracket to a support, thereby preventing damage to the luminaire housing. The luminaire housing has an aperture that is adapted to receive the electrical power supply. A first fastener hole in the luminaire housing is adapted to receive a first fastener to secure the luminaire housing to the support. A bracket has a first opening aligned with the luminaire housing aperture and a second opening aligned with the first fastener hole.

Abstract: A micro porous gas breather/filter assembly can be coupled to a housing of an electrical enclosure. The filter assembly has a two portion housing with the filter disposed between them. An adhesive on the filter attaches the filter to one or both portions of the housing. The filter allows gas to pass from the enclosure through the filter and to the atmosphere, but prohibits liquid from passing into the enclosure device. By filtering gases and liquids in this manner, the filter vents explosive and/or flammable gases from an electrical enclosure, while preventing liquid and other contaminants from entering the enclosure and damaging the electrical device or its wiring.

Abstract: A method and apparatus are provided to retrofit a gas discharge lamp ballast designed for use with a first lamp having a first power rating to be used with a second lamp having a second power rating. The ballast has a core, a coil and a serially-connected ballast capacitance device and is characterized by a first net impedance of the ballast reactance to allow operation of the first lamp in an operating range in which the first lamp is designed to operate. When the first lamp is replaced with a second lamp having a different lamp impedance than the first lamp, the capacitance of the ballast capacitance device is selected so as to change the first net impedance of the ballast to a second net impedance which allows the ballast to maintain proper operation of the second lamp in accordance with its specifications and rating.

Abstract: In a recessed lighting fixture intended to be laid onto horizontal flanges of inverted T-shaped rails of a grid-type ceiling, the rails having a stem with a bulb defining shoulders below the upper edge of the stem, the fixture having a housing with metal end plates, a hook is formed integrally with one of the end plates. The hook extends across and embraces the bulb. The hook is either formed with a nose projecting in a direction toward the end plate and beneath a shoulder defined by the bulb, or a tab, integral with the end plate, is provided that has a free upper edge projecting from the end plate toward and beneath a shoulder facing the end plate.

Abstract: Electrical socket device includes a threaded shell having inwardly projecting protuberances in the shell for cleaning the threaded base of the lamp when screwed into the socket. A resiliently mounted center contact arranged at the bottom of the socket has a central depression with a slot formed therein for cleaning the bottom contact of the lamp base.