Abstract:
A mercury-free low-pressure lamp having a bulb is provided. The bulb includes an emissive material and one or more phosphors. The emissive material includes at least one of an alkali metal or an alkaline earth metal, wherein when the bulb is in a non-operational state, the emissive material condenses into a liquid or solid, and when the bulb is in an operational state the emissive material forms an emitter, the emitter in combination with one or more gases generate photons when excited by an electrical discharge. The one or more phosphors are configured to convert at least a portion of the photons to other visible wavelengths.
Abstract:
A compact germicidal lamp having a plurality of adjacent parallel glass cylinders capable of transmitting different wavelengths of ultraviolet radiation connected by a perpendicular glass tube. A first glass cylinder made of a doped quartz material and capable of transmitting ultraviolet radiation in the wavelength range of approximately 254 nanometers is positioned adjacent a second glass cylinder made of a quartz material capable of transmitting ultraviolet radiation in the wavelength range of approximately 185 nanometers. The first and second glass cylinders are connected by a perpendicular glass tube. The compact germicidal lamp, when used in a germicidal system, provides effective germicidal action in a small space. The germicidal lamp of the present invention is more easily manufactured than prior germicidal lamps and can be made having a high power.
Abstract:
A low-pressure gas discharge lamp equipped with a gas discharge vessel containing an inert gas filling as the buffer gas, and with electrodes and with means for generating and maintaining a low-pressure gas discharge, is described, wherein the lamp contains at least one tin halide.
Abstract:
A low-pressure mercury lamp has: an arc tube formed by an arc-tube body in helical configuration, and electrodes provided at respective ends of the arc-tube body; and bases supplying power to the electrodes. The arc-tube body is made of a glass tube winding around an axis A while moving into a direction of the axis A. Ends of the glass tube are positioned away from each other with the winding part therebetween in the direction of the axis A. An outer diameter of the winding part seen in the direction of the axis A is within a range of 16 mm to 38 mm.
Abstract:
A lamp includes an enclosure with partitions defining a channel having channel segments and/or providing multiple paths for an electrical arc to travel. The channel segments can be implemented by adding additional electrodes in the channel formed by the partitions, by forming a channel where the arc may travel in multiple directions, or by a combination of these methods. The channel segments and multiple directions of arc travel tend to reduce the voltage required to start the lamp.
Abstract:
A high reliability, low power lamp for use in illuminating traffic signal indicators, comprising a "serpentine grid structure" comprising a first and a second overlapping neon light source. The two neon light sources are placed in close proximity to one another, thus allowing each light source to be illuminated more rapidly due to the reduced length of each tube and the interaction of each tube with the other. The physical layout of the indicator is preferably designed to enhance the operation of the neon tube by causing heat generated by the power supply to raise the temperature of the air surrounding the neon tube.
Abstract:
A fluorescent lamp is disclosed containing a deposit of a dried metal hydride-containing paste. The dried metal hydride-containing paste has a decomposition temperature higher than the temperature present during normal lamp operation. At the end of the lamp life, an increase in lamp temperature decomposes the metal hydride-containing paste and releases hydrogen within the lamp. The presence of hydrogen causes the lamp to extinguish passively without significant end heating or glass cracking.
Abstract:
A fluorescent low pressure discharge lamp is provided with axially mounted cold-cathode electrodes consisting of a sintered shaped mixture of inorganic material including about 50-90% by weight of tungsten and the remainder BaO or a mixture of BaO, CaO and SrO and oxides of Y, Zr or Hf or the rare earths. The electrodes have a uniform density throughout with a porosity of less than 10%.
Abstract:
Multiple concentric, triangular cross-sectioned fluorescent lamp tubes, located substantially in the same plane with respect to each other, are utilized in appropriate assemblies for: 1) a direct screw-in replacement for reflective incandescent lamps and; 2) recessed ceiling fixtures that are typically hardwired. The inherent triangular geometries of the concentric, substantially same plane lamps create mutually benefiting reflecting surfaces to maximize the net light output. The triangular geometry enables light from two sides of the fluorescent tubing to be efficiently cast if desired (or muted by absorbent housing wall if desired). The remaining side, or base, of each triangular tube produces light that is redirected by opposing, intersecting, coaxial, conical reflectors arranged to direct the light through the unobstructed center of the concentric tubing arrangement. A transparent collimating structure adjacent to the triangular tub bases is used to enhance control of the light emanating from the base. The arrangement is incorporated in a single assembly with an Edison screw-in base and as lamp assemblies for use in hardwired fixtures.
Abstract:
A fluorescent light fixture assembly that provides unidirectional lighting having an intensity which is comparable to that provided by incandescent bulbs within parabolic reflective housings. The light fixture assembly comprises a fluorescent bulb, having an axis of extension, which is connected to an adaptor and a socket member. The fluorescent bulb is situated within a parabolic reflective housing having a longitudinal axis. The reflective housing is affixed to the adaptor so that the axis of extension of the fluorescent bulb is conspicuously angled with respect to the longitudinal axis of the reflective housing.