Abstract: An apparatus for retrofitting a HID lighting system includes using existing components of previously installed HID lighting systems such as its ballasts while replacing some capacitors to adjust the power supplied to a retrofit LED luminaire. Unused ballast drivers are removed, and a self-contained ballast driver assembly is mounted into the electronic control enclosure of the previously installed lighting system. Some of the retrofit LED luminaires include an uplighting lens, an optic, or a diffuser for providing uplight. An aiming bracket and an aiming plate allow for the horizontal aiming angle of a light luminaire to be set.

Abstract: A tank-to-tank penstock electric generator system includes a water storage tank having a storage tank lower end with a water release port; a water receiving tank below the level of the water storage tank having a receiving tank upper end with a water receiving opening; a water wheel rotatably mounted on a water wheel mounting structure and having a water wheel rotational axis positioned substantially below the level of the water release port and extending above the level of the water receiving opening; and an electric generator having a generator rotor drivably connected to the water wheel through a drivable connection, so that rotation of the water wheel rotates the generator rotor; so that water flows out of the water storage tank through the water release port, over the water wheel and into the water receiving tank through the water receiving opening, thereby rotating the water wheel and the generator rotor and generating electricity.

Abstract: A pre-concentration device and a method are disclosed for concentrating gaseous vapors for analysis. Vapors sorbed and concentrated within the bed of the pre-concentration device are thermally desorbed, achieving at least partial separation of the vapor mixtures. The pre-concentration device is suitable, e.g., for pre-concentration and sample injection, and provides greater resolution of peaks for vapors within vapor mixtures, yielding detection levels that are 10-10,000 times better than direct sampling and analysis systems. Features are particularly useful for continuous unattended monitoring applications. The invention finds application in conjunction with, e.g., analytical instruments where low detection limits for gaseous vapors are desirable.

Abstract: A method of dispersing flux in molten metal includes providing a source of flux powder and a source of gas. An impeller is disposed on an end of a shaft inside the impeller chamber of a base made of heat resistant material. The base is submerged in the molten metal and includes a molten metal inlet opening into the impeller chamber and a molten metal discharge passageway extending from the impeller chamber to an exterior of the base. Molten metal is drawn through the inlet opening into the impeller chamber by rotation of the impeller in the impeller chamber. The molten metal is moved out of the impeller chamber through the discharge passageway by the rotation of the impeller. A discharge stream of molten metal travels through the discharge passageway into the molten metal exterior to the base. The gas flows from the gas source into a refractory flux conduit. The flux conduit extends from outside the molten metal into fluid communication with the discharge passageway.

Abstract: A pre-concentration device and a method are disclosed for concentrating gaseous vapors for analysis. Vapors sorbed and concentrated within the bed of the pre-concentration device are thermally desorbed, achieving at least partial separation of the vapor mixtures. The pre-concentration device is suitable, e.g., for pre-concentration and sample injection, and provides greater resolution of peaks for vapors within vapor mixtures, yielding detection levels that are 10-10,000 times better than direct sampling and analysis systems. Features are particularly useful for continuous unattended monitoring applications. The invention finds application in conjunction with, e.g., analytical instruments where low detection limits for gaseous vapors are desirable.

Abstract: An apparatus and method are disclosed for pre-concentrating gaseous vapors for analysis. The invention finds application in conjunction with, e.g., analytical instruments where low detection limits for gaseous vapors are desirable. Vapors sorbed and concentrated within the bed of the apparatus can be thermally desorbed achieving at least partial separation of vapor mixtures. The apparatus is suitable, e.g., for preconcentration and sample injection, and provides greater resolution of peaks for vapors within vapor mixtures, yielding detection levels that are 10-10,000 times better than for direct sampling and analysis systems. Features are particularly useful for continuous unattended monitoring applications.

Abstract: A method of dispersing flux in molten metal includes providing a source of flux powder and a source of gas. An impeller is disposed on an end of a shaft inside the impeller chamber of a base made of heat resistant material. The base is submerged in the molten metal and includes a molten metal inlet opening into the impeller chamber and a molten metal discharge passageway extending from the impeller chamber to an exterior of the base. Molten metal is drawn through the inlet opening into the impeller chamber by rotation of the impeller in the impeller chamber. The molten metal is moved out of the impeller chamber through the discharge passageway by the rotation of the impeller. A discharge stream of molten metal travels through the discharge passageway into the molten metal exterior to the base. The gas flows from the gas source into a refractory flux conduit. The flux conduit extends from outside the molten metal into fluid communication with the discharge passageway.

Abstract: Methods, apparatuses, and systems are presented for positioning a sensing head relative to a workpiece, involving a control unit operative to provide a plurality of control signals to iteratively control positioning of the sensing head relative to the workpiece, a plurality of air injectors disposed and fixedly connected on a periphery of the sensing head, each of the air injectors capable of being independently controlled to eject a gas between the sensing head and the workpiece to create an air bearing and affect positioning of the sensing head relative to the workpiece in response to at least one of the control signals, and a plurality of sensors providing a plurality of feedback signals to the control unit, the feedback signals containing information relating to positioning of an optical imaging sensing head relative to the workpiece.

Abstract: A mechanical system for handling large and thin glass plates of dimensions as much as 2 m by 2 m by 0.5 mm, such as used to manufacture LCD panels in LCD panel testers, provides for positioning of the repair and inspection equipment by using lightweight hollow chucklets in air-bearing and vacuum contact with the glass plate under test, balanced on a rail along the center of mass for translation without warping. The elimination of a heavy rigid platform results in significantly reduced hardware costs, flexibility in processing and improved positioning performance.

Abstract: A system is provided wherein a plurality of high accuracy air injectors are disposed along the edges of a sensor plate of a sensing head to form an air bearing and a plurality of high displacement air injectors are also disposed along the edges of the sensor plate to form an air bearing, each independently controlled, with the sensing head having high accuracy and low accuracy separation distance sensors coupled in a feedback loop through a mapper (a programmable CPU) which, without knowledge of the exact position of the sensors or air injectors, but being responsive to feedback information, iteratively adjusts relative separation of the sensor plate and a flat panel workpiece to the desired positional accuracy through digital to analog converters supplying control signals to analog amplifiers controlling orifices.

Abstract: A method and apparatus for preventing false nulls in an optical delay line by causing the input optical beam to be frequency modulated or variably time delayed so that the components of the optical signal in the output cannot be of equal magnitude and of opposite phase.

Abstract: A calibrate and run bias voltage control method for an optical delay system utilizing a plurality of voltage controlled switches which may experience bias drift wherein during calibration an output optical power error signal of the system is monitored while rapidly changing the bias voltages to the switches according to a desired algorithm and setting the bias voltages at a the level achieved when the output error signal falls below a predetermined tolerance level.

Abstract: Electromagnetic fluid control valves disclosed have a valve body with at least two ports through which a fluid is passed in flowing therethrough with at least one port being closable. Electromagnetic actuating means includes an elongated magnetic core with spaced, opposed first and second leg portions and an intermediate connecting leg portion. One of the first and second leg portions terminates in an end face. A coil wound on the core produces magnetic flux therein. An armature of minimum mass spans the end portions of the first and second leg portions of the core and provides a face opposite the end face of the core to define an open unobstructed air gap. A spring bias is employed to maintain the air gap at its maximum length when the valve is in the deenergized state.

Abstract: A cover assembly for a car comprising a flexible roll-up cover and a positioning arrangement for the cover. The positioning arrangement includes a roller on which the cover can be wound and rear and front sleeves that can be mounted on the car to extend horizontally from side to side above the car at its rear and front ends. Each sleeve slidably receives extension tubes that can be slid out laterally. The flexible cover has a central top segment which extends between the rear and front sleeves, front, back and side flap segments which hang down from the top segment, and an end segment connecting the top segment to the roller so that the entire cover can be wound on the roller. The side flap segments carry straps at their front and rear edges with VELCRO hook-and-loop fastener elements. When the side flap segments hand down the straps attach them to the front and back flap segments.

Abstract: A game apparatus having flexible and resilent, elongated, player's wands and a game board with side openings for the insertion of the wands. Between the side openings the game board has a labyrinthine maze of interconnected curved passageways connecting the side openings. The maze is formed by several series of circularly arranged vertical rollers and vertical posts in the paths between different series of the rollers. Each wand has a tapered leading end which determines the path it takes through the maze.

Abstract: A multiport optical cable or bus, composed of bundles of parallel fibers interconnected by an optical star structure, has a higher packing fraction and greater efficiency in the mixing and redistribution functions because the star's radiating arms have their individual cladding layers omitted or removed and because they are fused together to form the mixer section or a part of it. Where the numbers of input and output ports and arms are unequal, the unclad arms have their fused portions optically spliced or connected to form a composite mixer section. Several sections may be cascaded, using the same structural principles, to provide additional lower-level optical outputs for control or other purposes. The cladding function for the star structure is provided by separately encasing the radiating arms and mixer section or sections in a light-reflecting material. Preferably, this is a plastic potting compound having an optical index of refraction lower than those of the star arms or mixer portions.

Abstract: There is disclosed an optical transmission system which employs a plurality of receiver-transmitter pairs. One of the plurality of pairs is selected to propagate optical signals under control of switching means. The optical signal as propagated is monitored and if a fault is detected in the signal, another redundant receiver-transmitter pair is automatically switched in. This pair is also monitored to determine whether or not the optical signal is valid and if not, the sequence continues until a valid signal is being propagated.