Abstract: In a barricade warning light, a first casing formed from two (2) mated halves provides a detachable enclosure, inaccessible (except by a special key) before detachment of a second casing holding batteries replaceable with the casings detached. A mounting rod assembly extends from the first casing for attachment to a barricade. An electronic module holds a photocell, an LED and circuitry energizing the LED when the photocell detects darkness. The first casing has a (a) first opening for coupling the key to a switch controlling the warning light operation, (b) second opening for key insertion to couple (decouple) the first casing to (from) the mounting rod assembly and (c) third opening for key insertion to couple (decouple) the casings. With the casings decoupled, (a) the electronic module may be assembled (disassembled) to (from) the first casing and (b) a base plate is attachable (separable) to (from) the bottom of the first casing.

Abstract: A concentrator solar cell array module having a metallic heat sink with a planar mounting surface. A semiconductor spacer is provided. The semiconductor spacer is provided with a layer of insulating material in the form of silicon oxide. The silicon oxide surface is secured to the mounting surface of the heat sink by a thermally conductive adhesive. A semiconductor solar cell is provided. Solder is utilized for securing the solar cell to the spacer. A glass cover is secured to the solar cell by an adhesive. The glass cover is provided with a textured surface to cause diffusion of the light impinging upon the solar cell.