Abstract: The floor advertisement apparatus is used in a cavity formed in the floor of a building. A lower holding layer is located and secured in the bottom of the cavity. An upper holding layer with an opening extending therethrough has a transparent layer is secured to one side of the upper holding layer. The transparent layer and the upper holding layer are located in the cavity. An advertising layer is secured to the lower side of the transparent layer within the opening for viewing from above. Both of the holding layers may be magnetic material or one can be magnetic material and the other metal attracted by magnetic lines of force for removably holding the upper layer to the lower layer when the two layers are located next to each other such that the transparent layer with its advertising layer is removably held in the cavity. In another embodiment, a support layer is secured in the cavity.

Abstract: The floor advertisement apparatus is used in a cavity formed in the floor of a building. A lower holding layer is located and secured in the bottom of the cavity. An upper holding layer with an opening extending therethrough has a transparent layer secured to one side of the upper holding layer. The transparent layer and the upper holding layer are located in the cavity. An advertising layer is secured to the lower side of the transparent layer within the opening for viewing from above. Both of the holding layers may be magnetic material or one can be magnetic material and the other one of metal attracted by magnetic lines of force for removably holding the upper layer to the lower layer. In another embodiment, the transparent layer has a layer of adhesive material secured to its bottom side for removably securing the transparent layer in the cavity.

Abstract: A cavity is formed in the floor of a building for receiving the floor type advertising apparatus. A lower holding layer of magnetic material having an opening formed therethrough is located and secured in the lower portion of the cavity. An upper holding layer of magnetic material having an opening formed therethrough is attached to the lower side of a transparent layer and both the transparent layer and the upper holding layer are located in the cavity to allow the magnetic lines of force from the holding layers to removably secure the transparent layer and the upper holding layer to the lower holding layer in the cavity. A support layer is secured to the floor of the cavity within the opening of the lower holding layer for supporting an advertising layer.

Abstract: The floor advertising apparatus is used in a cavity formed in the floor of a building or the like. A thin lower layer is located and secured in the bottom of the cavity. A thin transparent layer is located in the cavity with its surrounding edge portion secured to the lower layer with adhesive. An advertising layer is located between the transparent layer and the lower layer below a viewing portion within the surrounding edge portion such that the advertising layer can be seen through the transparent layer when viewed from above. The advertising layer may be separate from the transparent layer or secured to its lower side. An opaque border is secured to the transparent layer in a position to cover the edge portion and adhesive such that the adhesive cannot be seen when the transparent layer is viewed from above. Double sided tape is used to secure the lower layer to the floor of the cavity.

Abstract: A cavity is formed in the floor of a building for receiving the floor type advertising apparatus. A magnetic layer is located and secured in the lower portion of the cavity. A metal layer having an opening formed therethrough is attached to the lower side of a transparent layer and both the transparent layer and the metal layer are located in the cavity to allow the magnetic lines of force from the magnetic layer to removably secure the transparent layer and the metal layer in the cavity. In one embodiment, the lower holding layer has an opening formed therethrough in which is located an advertising layer which can be seen from above through the opening and through the transparent layer. In another embodiment, the metal layer and the magnetic layer may be reversed in positions.

Abstract: An illuminated exit sign having a novel layered arrangement including a multiplicity of miniature incandescent light bulbs. The light bulbs are mounted on a lamp assembly board in such a manner as to spell out the word "EXIT." A plastic sheet having holes therein is laid over the lamp assembly board, each of the bulbs entering a hole in the sheet. A stencil-type mask on top of the sheet defines the work "EXIT." When power is supplied, the bulbs provide direct illumination to the observer, and also diffuse light throughout the plastic sheet, providing background illumination of the lettering, with improved field of vision.

Abstract: A fluorescent lighting installation incorporates a first switch device for applying and removing power from the installation and a plurality of second switch devices for providing plurality light levels. The respective second switch devices are located within respective ones of a plurality of selected fluorescent lighting fixtures and are interconnected with the respective power inputs, fluorescent lamps and ballasts of the respective selected fluorescent lighting fixtures. The respective second switch devices are operable to step through plural states to provide plural operating states for the fluorescent lamps in the selected fluorescent lighting fixtures. The second switch devices step from one state to the next in response to the application of power for an indefinite period of time by the first switch device.

Abstract: Improved lighting devices and systems made up of plurality of groups of miniature incandescent lamps, with lamps connected in series and groups connected in parallel, a lens for each lamp made of clear translucent material with double diffusion means, with lamps arranged in a predetermined array with respect to a reflecting surface which in most cases has the quality of specular reflection, and with a stated minimum light source density, as well as other aspects and features.

Abstract: An emergency lighting unit having physical dimensions and electrical and electronic components and circuitry such that it can be directly substituted for a conventional hot cathode type fluorescent lamp in a conventional fluorescent lamp fixture which incorporates a rapid start type ballast. The emergency lighting unit comprises a direct current power supply in the form of rechargeable batteries, a light source in the form of one or more groups of low voltage high intensity miniature lamps, and electronic circuitry and components utilizing power supplied by the rapid start ballast for charging the batteries, monitoring their condition and reacting accordingly, and detecting the state of the normal alternating current power source and reacting accordingly. In a preferred embodiment, the emergency lighting unit utilizes pulses to detect the emergency or "FAIL" state of the system power. The pulses are supplied by a unique pulser unit which is designed to be directly substituted for a standard wall switch.

Abstract: A lighted exit sign comprising a light transmitting plate having a viewing side and upper and lower edges onto which light can be projected for transmission into the plate for viewing from the viewing side. Upper and lower printed circuit boards are supported close to the upper and lower edges of the plate. A plurality of small incandescent light bulbs are secured to the upper and lower circuit boards for producing light when energized for projection onto the upper and lower edges for transmission into the plate for viewing from the viewing side. A white, light reflecting layer is formed on the side of the plate opposite the viewing side. The letters EXIT are formed on the viewing side in two layers. The first layer is white in color and is secured directly to the viewing side. The second layer is preferably red in color and is secured to the first layer. A transformer is employed for converting an A C voltage to a level below the rated voltage of the bulbs and to a level above the rated voltage of the bulbs.

Abstract: Improved edge lighted devices incorporate one or more light transmitting body assemblies of unique design, resulting in superior performance from both brightness and energy efficiency standpoints. Techniques for obtaining advantageous light transmitting body surface treatment are disclosed. Also disclosed are arrangements for reducing the amount of material utilized for the light transmitting body.