Abstract: An indicator gauge is disclosed, which comprises a meter panel. The meter panel includes a transparent base plate, a transparent colored layer applied to a rear surface of the transparent base plate and a fluorescent transparent substance layer applied to a front surface of the transparent base plate. A visual alarm indicator includes an opaque mark mounted to a given portion of the meter panel, a lamp housing having an open end which is connected to a rear surface of the meter panel in such a manner as to face toward the given portion and an electric lamp installed in the lamp housing. An ultraviolet lamp is arranged in front of the meter panel and generates ultraviolet rays upon electric energization thereof.

Abstract: A digital measuring device having a relatively rigid slide and a flexible, substantially transparent band with opaque indicia placed thereon, the band being capable of being pulled centrally through an opening in the slide. The slide houses a plurality of optic fibers with one end of each fiber terminating at a light-receiving panel and the other end of each fiber terminating at a digital read-out panel. The ends of the fibers at the digital read-out panel are arranged to form, e.g., a generic "88" configuration, from which the digits 0-99 may be formed. In operation, the band is pulled through the opening in the slide and light passes through the transparent areas of the band and into the light receiving panel. The light continues through the optic fibers and lights up a particular digital configuration at the digital read-out panel. The slide and band may be useful e.g., as a belt-like device for measuring one's waist, or as a carpenter's tape measure.

Abstract: Two tri-color light emitting diodes (LEDs) are mounted in spaced apart relationship and are supplied via a switch with appropriate potentials to illuminate one LED in one color (red) and the other in another color (green) and vice versa to indicate to a boatman on which side of a buoy he should pass to remain in a channel marked by red and black buoys.

Abstract: A compass having a magnetic element pivotally mounted in a housing, the housing including a light source and one end of an array of fiber optic bundles and the element carrying a reflector and/or an aperture to selectively permit light from the source to reach a selected one or more of the fiber optic bundle ends within the housing in dependence upon the orientation of the element relative to the housing about the pivot axis of the pivotal mounting.

Abstract: An information displaying apparatus includes, bundles of optical fibers with their ends coplanar and disposed in line. A movable masking member imposes information on the light input to the fiber array. At the output end, information markings are selectively illuminated or otherwise luminously designated to display various kinds of information. Displaying means may be disposed within a view finder or on the outer casing of a camera. An artificial light source operates to provide light through the masking member and may be switched on manually or automatically when needed for information display.