Abstract: A decorative glass for lamps comprises a fastening device formed as a single body and able to allow direct association with a lamp holder. The fastening device preferably comprises a thread formed on the inner side of a surface portion of the glass.

Abstract: A reflective shade for an electric table lamp includes a conventional frustrum shape but with removeable translucent plastic disks spanning the top opening for reflecting the light back down toward the table top and for transmitting colored light for creating an ambiance in the environment. The disks attached to the shade are supported on a cylindrical chimney and the lower disk may fit within the chimney to center the shade on the lamp.

Abstract: A frusto-conical lantern reflector comprised of two semicircular, flat sheets made of a resilient material, each with at least one surface that reflects light. Each generally semicircular sheet has a semicircular cut-out that forms an opening in the top of the assembled reflector. Fasteners are located on either side of the cut-away semicircular portion; the fasteners on one sheet are disposed to releasably mate with the fasteners on the other sheet so that when the sheets are deflected and the fasteners on the one sheet are aligned with the fasteners on the second sheet, the two sheets together form a frusto-conical reflector.

Abstract: A sparger for use in microcarrier fermentation systems is provided which includes a narrow, vertically extending outer chamber defined by a solid wall and a wall formed by a screen, wherein air or other gas is forced under pressure through a tube to the bottom of the chamber and from there to a distribution member for the release of the gas upwardly into the chamber. The top of the chamber is provided with exit openings which communicate to a point above the surface of the medium. In an alternate embodiment, gas is released at the bottom of an inner chamber defined by a wall formed with a plurality of screened windows.

Abstract: The double-ended lamp has a base at each end, one of which is connected to cable. To prevent scattering of the high-pressure lamp bulb in case of explosion for example due to improper handling before installation, it is enclosed within a transparent protective tube, secured at its ends by caps slipped over the respective bases. To hold the caps and hence the tube in place, and prevent rolling of the bulb enclosed by the tube in the tubular end caps, the connecting cable is passed out of one end base from the side and it is of such length that it can be stretched adjacent the tube enclosure of the lamp to the other base, to be there fastened by a cable connector to the base pin terminal by a wing nut, or the like.