Abstract: A photovoltaic array includes a plurality of elongated rails and rectangular photovoltaic modules. Each rail can have an extruded resin construction and can include a lower base and an upper cap that cooperate to define a pair of grooves that open in opposite directions from each other. The elongated rails can be mounted on a support surface and extend in a spaced and parallel relationship with each other. During mounting, edges of the photovoltaic modules can be received by the grooves. In this way, the photovoltaic modules can be mounted above the support surface in a spaced relationship from the support surface.

Abstract: A photovoltaic array includes a plurality of elongated rails and rectangular photovoltaic modules. Each rail can have an extruded resin construction and can include a lower base and an upper cap that cooperate to define a pair of grooves that open in opposite directions from each other. The elongated rails can be mounted on a support surface and extend in a spaced and parallel relationship with each other. During mounting, edges of the photovoltaic modules can be received by the grooves. In this way, the photovoltaic modules can be mounted above the support surface in a spaced relationship from the support surface.

Abstract: A laser safety enclosure structure has an outer enclosure made of a formable material with a limited ability to withstand exposure to a laser beam and an inner enclosure composed of a laser beam blocking material capable of indefinitely withstanding exposure to a laser beam of a given wavelength and power level so as to prevent such a laser beam incident on the blocking material from escaping the inner enclosure.

Abstract: A vibrating screen apparatus for effecting screening of materials includes a frame with first and second vibrating screen deck units mounted one above the other in it. To provide maximum flexibility of operation, the vibrating deck units are pivoted at the material feed end on the frame. Hydraulic cylinders are attached between the free ends of the first and second vibrating screen deck units and the frame for independently varying the angle or slope of each of the deck units, relative to the frame, for adjusting the dwell time of material passing over the deck units. A flexible corrugated rubber curtain extends between the upper deck unit and the lower deck unit to ensure that material which passes through the upper deck unit is guided onto the surface of the lower deck unit. In addition, each of the vibrating screen deck units has an independent vibrator mechanism on it; so that the vibration rate and magnitude may be independently adjusted for each of the deck units in the system.