Abstract:
The present invention provides an optical device comprising: (a) a substrate; and (b) a plurality of units on the substrate. Each of the units comprises a plurality of tapered waveguides wherein: (i) each of the waveguides has a light input surface adjacent the substrate (a) and a light output surface distal from the light input surface and the light input surface area is greater than the light output surface area; (ii) each of the waveguides tapers from its light input surface to its light output surface at an angle; and (iii) at least one of the light input surface area or the light output surface area of at least one of the tapered waveguides is different than the corresponding surface area of the remaining tapered waveguides in the unit. Preferably, the optical device is a viewing film. The present viewing film has reduced or substantially eliminated intensity hot spots and interference patterns. The present viewing film may be used in display devices, such as for example projection display devices, off screen display devices, and direct view displays. Such displays are used in a wide range of applications including computer terminals, airplane cockpit displays, automotive instrument panels, televisions, and other devices which provide text, graphics, or video information.
Abstract:
A pretensioner usable with a seat belt to protect an occupant from injury comprising: a cable (40), movable in a belt tightening direction and in a belt loosening direction connected to the seat belt so that motion of the cable causes movement of the seat belt; a piston (112) for moving the cable and the belt a determinable amount in the tightening direction; a wedge housing (22) and wedges (30a, b) responsive to the motion of the cable in both the belt tightening direction for releasing the cable and responsive to motion of the cable in the loosening direction for locking upon the cable to prevent same from moving in the presence of a predetermined force applied to the belt.
Abstract:
The present invention provides an injection molded article comprising: (a) vinyl polymer; (b) an effective amount for stabilizing the vinyl polymer of tin stabilizer and metallic stearate; and (c) an effective amount for lubricating the vinyl polymer of polyethylene having a Brookfield viscosity at a temperature of 150 DEG C of between about 1,000 and about 100,000 centipoises and an acid number as determined by standardized titration of KOH of between about 1 and about 40. The present injection molded article has an improved splay rating and is useful as pipe fitting.
Abstract:
The present invention is directed to a process for treating an aqueous KF waste stream comprising at least one treatment step selected from the group consisting of inert gas stripping the aqueous KF waste stream, passing said waste stream through a carbon bed, concentrating said waste stream or a combination thereof to remove dissolved organic compounds. The present invention is also directed to subjecting the treated KF waste stream to electrodialytic splitting in a water splitting cell to form HF and either KOH or an acid depleted salt stream. The dilute HF can be concentrated to a concentrated and commercially viable product.
Abstract:
Optical fiber coatings may be prepared from compositions containing one or more vinyl ether polyester oligomers prepared by reacting an hydroxyl-terminated polyester or polyether, a polyol, and a hydroxy monovinyl ether, with one or more mono or multifunctional vinyl ether terminated monomers, which may be derived from esters or alcohols.
Abstract:
A load-absorbing retractor (24) comprising: a rotating spool or reel (24), seat belt webbing secured to the reel (24); first means (52), responsive to loads generated during an emergency situation, for deforming a portion of the reel (24) and in so doing dissipating a determinable amount of the energy.
Abstract:
A process for producing 1,1,1-trifluoroethane by reacting 1,1,1-trichloroethane with hydrogen fluoride in the presence of a fluorination catalyst under conditions sufficient to produce 1,1,1-trifluoroethane but in the absence of a solvent. The 1,1,1-trifluoroethane is useful as a refrigerant, in air conditioners, heat pumps, and as a propellant or blowing agent.
Abstract:
A gas discharge display having a base member, a spacer member, an electrode member and a window sealed to each other to form a gas tight structure. The base member, spacer member and electrode member are made from copper clad printed circuit boards and are fabricated using existing printed circuit board technology. The spacer member and electrode member have a matrix of holes aligned with each other along orthogonal rows and columns. Parallel lower electrodes are provided on the surface of the base member aligned with either the rows or columns. Cylindrical upper electrodes are provided in the holes of the electrode member and are connected to each other by parallel electrical connectors provided on the surface of the electrode member orthogonal to the parallel electrodes on the base member. The display is sealed with an ionizable gas contained within the holes of the spacer and electrode members.
Abstract:
This invention relates to vinyl ether-based coatings for which properties such as color stability, thermal stability, mechanical stability, hydrolytic stability, and resistance to embrittlement may be maintained and properties hydrogen generation and blocking are minimized. The coatings comprise a vinyl ether-containing composition polymerizable by actinic, gamma ray, or electron beam radiation comprising: (a) an oligomer or a mixture of oligomers which are monofunctional, multifunctional, or a mixture of both monofunctional and multifunctional and which have a reactive functionality chosen from the group consisting of epoxy, acrylate, vinyl ether, maleate, or mixtures thereof; (b) monomers which are monofunctional, multifunctional, or a mixture of both monofunctional and multifunctional monomers and which have a reactive functionality chosen from the group consisting of epoxy, acrylate, vinyl ether, maleate, or mixtures thereof, wherein at least one of (a) or (b) must contain a vinyl ether functionality; (c) a photoinitiator, optionally including a sensitizer, chosen from the group consisting of a cationic photoinitiator and a radical photoinitiator; and (d) a thermal oxidation stabilizer. The composition also comprises additives including hydrogen stabilizers; mixtures of hindered phenols, organic sulfides or disulfides, and transition metal salts of organic compounds. Adhesion to a substrate, particularly glass, is achieved by coupling agents including vinyl ether urethane siloxane compounds.
Abstract:
An improved method for forming planarization films which remain adhered to substrates upon exposure to heat comprising first applying a polymeric solution containing a low molecular weight novolac resin, a surfactant selected from the group consisting of a non-fluorinated hydrocarbon, a fluorinated hydrocarbon and combinations thereof, and an optional organic solvent to a substrate, followed by heating the substrate.