Abstract: An underwater light (12) for above ground pools (10) includes a housing (28) sealed to the outer surface of the pool wall (24). An opening in the pool wall and liner (16) communicates with an opening in the front wall (28) of the housing, and a light transmitting cover assembly (70) is sealed to the pool liner (16) to cover this opening. The rear wall (34) of the housing is removable to provide access to a light unit mounting assembly including a base bracket (38) secured around a light (58) and biases the cushioning gasket into engagement with a pad mount (56). This facilitates removal and replacement as well as adjustment of the light (58) without interrupting pool operation.

Abstract: A heavy duty electrical power supply cabinet having a plug-in twist lock receptacle construction bodily supported against radial movement terminally at both of its ends for heavy duty use, and at a point intermediate its ends is rigidly supported against rotation and axial loosening by mating chordal flats that are spaced from the front wall of the cabinet in a rigidly mounted channel member as secured by a lock washer.

Abstract: An inert gas is supplied in a conduit system at a pressure high enough to provide a desired shielding gas volume at each and all arc welding sites spread over a substantial work area and each welder is responsible for the performance of a lightweight, readily portable, security protected, fixed pressure output regulator of high accuracy preferably having a pressure gauge and two independent visible output flow meters and flow valves easily adjusted separately to provide proper shielding at the front and back of a weld simultaneously, but independently, under the personal control of each welder at each welding site with excellent mobility regardless of floor elevation, for an acceptable and individualized responsibility for each certified weld performed.