Keyhole illumination for a tumbler and cylinder lock comprising a miniature light source and a light transmitting pin in the pin holes.

A light valve and fluid suspension therefor which when activated decrease the transmission of radiation therethrough.

A link for use in a flexible support for a light fitting comprises a first section which has a part spherical outer surface and a second section which is connected to the first section and has a part spherical internal surface and a slot opening into said second section. Two similar links can be connected to make part of a flexible support by introducing the first section of a first link into the second section of a second link. The part spherical outer surface of the first section of the first ...

There is disclosed a light fixture having a ballast mounted on the housing thereof by means of a metal bracket having side walls which are connected to one another to form a corner and a base wall connected to each of the side walls intermediate their opposite ends. The side walls of the bracket are secured to adjacent metal side walls of the housing which are connected to one another at a corner thereof, and the ballast is releasably connected to the base wall of the bracket.

A teaching device having a base member with a metallic sheet thereon and a power source and indicator lamp assembly electrically connected to the metallic sheet. A clip is provided on the base member, also connected to the power source, and spaced from the metallic sheet. A question and answer folder is mounted on the base member with the clip in electrical connection with a metallic foil which is part of the question and answer folder. The question and answer folder has a control opening in reg...

A multi-sectioned, multi-purpose, illuminated marking device especially suitable as a water buoy in which the components can be readily assembled in end-to-end relationship to provide a buoyant device which can be readily seen for a considerable distance when located in the water or elsewhere. The assembled sections serve to house a lightbulb, batteries, switch system, and a reflector which, when the switch is turned on, causes the light to be magnified and transmitted through the translucent wa...

A luminescent photovoltaic array which employs a luminescent member carrying photovoltaic means on at least one of its sides, and conduit means in heat exchange contact with at least one side of said luminescent member, said conduit means being adapted to have a cooling fluid pass therethrough for cooling said luminescent member.

A light display for displaying varying patterns and colors of light randomly appearing on a translucent surface to which the light is directed from the back side from a light source through moving color means and past light ray distorting means comprising prisms, and means for causing the color and prism means to move to deliver a random pattern light display.

An improved light switch with light regulator is described. It includes a housing, a radiating aluminum plate, a panel frame, a micro-switch, a titling-board for the switch, a light regulator circuit board having mounted thereon a silicon controlled rectifier and an inductor. The housing is mounted on one side of the radiating aluminum plate and the panel frame and titling-board are located on the other side of the aluminum plate. The panel frame is provided with a sliding slit which accommodate...

A lampchanger for a light, such as a navigational light, having a rotatable turret for holding a plurality of lamps, fixed power contacts for engaging and lighting the lamp positioned in the operating position, and means for rotating the turret thereby placing a new lamp into operating position when a lamp burns out. The turret includes a body and a clamp yieldably urged against the body for releasably holding and locking the lamps between the clamp and the body. Lamps may slide into a tapered s...