Abstract: A CaO containing silicate glass composition which can further contain small amounts of lead oxide and barium oxide is generally useful for hermetically sealing the electrical in-leads of various electrical devices. The present glass has a composition range in percentages by weight of:______________________________________ Constituents Weight Percent ______________________________________ SiO.sub.2 65-75 Na.sub.2 O 9-13 K.sub.2 O 3-6 Al.sub.2 O.sub.3 1-4 CaO 4-8 BaO 0-4 PbO 0-6 Li.sub.2 O 0-2 ______________________________________along with minor amounts of incidental impurities, residual fluxes and refining agents.

Abstract: A process aid for fluorosilicone compositions and polymers to prevent such polymers in the uncured state from sticking or partitioning on processing equipment comprising adding to the fluorosilicone polymer composition from 2 to 25% by weight of a non-halogenated process aid which is a diorganopolysiloxane polymer having a viscosity varying from 100,000 to 10,000,000 centipoise at 25.degree. C. The organo groups in such a polymer are selected from alkyl radicals, vinyl radicals, phenyl radicals and mixtures thereof wherein the vinyl concentration varies from 5 to 25% by weight. In the alternative that may be utlizied at the same concentration a non-halogenated process aid which is a polysiloxane composed of R.sub.2 SiO units and R SiO.sub.3/2 units wherein the polyme has a viscosity in the range of 5 and 10,000 centipose at 25.degree. C and its silanol content varying from .1 to 5% by weight and R is a monovalent hydrocarbon radical.

Abstract: There is provided by the present invention, a silicone fluid useful as a hydraulic fluid and more particularly useful as a brake fluid for vehicles.This silicone fluid comprises generally a linear diorganopolysiloxane having a viscosity at 25.degree. C. of 20 to 500 centistokes. Various materials and additives can be added to such a silicone fluid so as to improve its properties as a hydraulic fluid.

Abstract: The performance characteristics of (Ba,Sr)F, (Cl,Br) : Eu.sup.+2 phosphors may be improved by combining these phosphors with particular rare earth oxyhalide phosphors. In the preferred embodiments, the latter phosphors have relatively small and well-formed crystalline particles which become interspersed with the larger crystalline particles of the (Ba,Sr)F, (Cl,Br) : Eu.sup.+2 phosphor.

Abstract: A longitudinally elongated, planar line strap for circuit breakers mounts on its upper surface adjacent one end a pair of transversely aligned, spaced apart main contacts. An arcing contact is mounted on a lanced-up portion of the strap joined to the strap body at a location intermediate the main contacts. An elongated arc runner is cantilever mounted to the free end of the lanced-up strap portion for extension out into an arc chute. The current in the strap flows along paths effective to motivate an arc off the main contacts and out onto the arcing contact and thence the arc runner where it is captured by the arc chute.

Abstract: A process for producing a silicone resin composed solely of difunctional siloxy units comprising hydrolyzing a diorganodihalosilane in a heterogeneous hydrolysis mixture having therein water, acetone, a water-immiscible organic solvent and optionally, an alcohol; wherein said hydrolysis must take place within ten minutes, and separating the water layer from the water-immiscible solvent silicone resin layer.The silicone resin is further purified and bodied in subsequent process steps. There is also provided by the present invention a silicone resin mixture composed of the above difunctional silicone resin and a silicone resin composed of trifunctional siloxy units and difunctional siloxy units which silicone resin mixture has good thermal stability at temperatures up to 700.degree. F.

Abstract: An improved electrostatically deposited coating is obtained by controlling the particle size and resistivity of the silica powder.

Abstract: A polysiloxane surfactant useful in controlling the foaming of a polyurethane foam having the formula, ##STR1## where y is a whole number varying from 15 to 150 and z is a whole number varying from 3 to 16 where R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms, R.sup.2 is selected from alkylene and arylene radicals of from 11 to 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30 for the case n is equal to 2, x varies from 1 to 40 for the case n is equal to 3 and 4 where there may be ether units with n equal to 2,3, and 4 in the same molecule.

Abstract: An improved static solid switching device is disclosed for activation by radiant energy when a flash lamp located adjacent thereto is flashed. The multiple flash lamp array having a plurality of lamps fired individually and in sequence for use with said improved static solid switching devices is further disclosed. The switches are prepared from compositions which include the presence of a non-conductive particulate solid to provide improvement in switch manufacture as well as switch operation.

Abstract: A fluorescent lamp construction is described utilizing a particular combination of two different phosphor materials in order to produce an efficient composite emission. The particular phosphor combination can be utilized as a blended mixture in order to provide efficient white light with color rendition comparable to deluxe-type fluorescent lamps.

Abstract: A door interlock includes first and second, normally intercoupled plates mounted to a circuit breaker for sliding movement between respective first and second positions. The first plate includes an aperture through which a circuit breaker trip pushbutton normally extends, thereby sustaining the plates in their first positions where the second plate serves as a catch for the door of the breaker enclosure. Upon depression of the trip pushbutton, the breaker is tripped and the plates may be conjunctively slid to their second positions where the first plate sustains the depressed condition of the pushbutton to ensure that the breaker is open, while the second plate clears the enclosure door such that it can be opened. If desired, the intercoupling between the plates may be defeated, such that the second plate can be slid to its second position independently of the first plate, and the door may be opened while the circuit breaker is closed.

Abstract: An alarm driver is described providing an audio frequency signal for operating the alarm of a smoke detector. The driver comprises a four transistor bridge in which the transistor input bias is momentarily interrupted at an audio rate to permit the bridge current supplied to the alarm to stop and change direction. Cross coupling is provided to achieve bistability in operation of the bridge, while commutation is achieved by utilizing energy stored in the inductance of the alarm to turn one pair of transistors on and the other pair off at each switching transition. The driver is designed for maximum reliability and minimum current drain and it is suited for battery operation. It is preferably fabricated by an integrated circuit process, typically using bipolar transistors and sharing the substrate with the other circuitry of the smoke detector.

Abstract: Increased optical transmission is provided for a body of light transmissive polycrystalline alumina body treated at elevated temperatures with a molten flux composition. A tube of the flux polished material which can be used as the light transmissive envelope for high intensity discharge lamps especially sodium vapor lamps, improves light output from the lamp as the result of increased in-line transmission for the treated envelope member. A method of chemically polishing polycrystalline alumina material in this manner is also disclosed.

Abstract: A portable ground fault circuit interrupting (GFCI) device includes a housing equipped with two sets of back mounted contact blades or prongs for insertion in a conventional duplex wall receptacle. One set of contact blades conveys current from one socket of the wall receptacle to a known GFCI receptacle via a relay, both mounted within the housing. The other set of blades are dummy blades frictionally engaged in the other wall receptacle socket to reliably retain the portable GFCI device in place. The GFCI receptacle is accessible through a front opening in the housing for plug connection with circuits for which ground fault protection is afforded.

Abstract: The present invention relates to a solid state imaging system in which pattern noise is cancelled both electrically and visually. Pattern noise takes the form of a succession of variable amplitude pulses occurring as each light sensing element in a row of elements is read out. The pattern noise is duplicated from row to row. Since pattern noise is initially many times larger than the video signal, it must be reduced to a fraction of the video signal for satisfactory imager operation. In accordance with the invention, a first video signal is formed in which each row of sensors is first scanned with video and pattern noise present followed by a second scanning with video absent and pattern noise present.

Abstract: An improved mercury vapor lamp construction as described which includes an ultraviolet reflecting underlayer of alumina particles for the phosphor coating to enable reduction in the phosphor coating weight without accompanying reduction in the lamp lumen output. The alumina underlayer comprises spherical alumina particles that have been vapor-deposited in a certain particle size range to provide selective reflection of the ultraviolet radiation being emitted from the overlying phosphor coating. The alumina underlayer is deposited upon the interior surface of the lamp glass envelope and has been found generally useful in otherwise conventional high-pressure and low-pressure mercury vapor lamps.

Abstract: An improved wire anvil member for a percussion ignitable type flash lamp is described having projection means to deflect hot primer particles upon ignition but which has openings permitting some of the hot primer particles to pass through for improved ignition of the principal combustible material contained in the lamp envelope. The present wire anvil can also be die-cast as an integral member utilizing commercially available zinc alloy materials.

Abstract: A coating of zirconium is bonded to niobium by applying to the niobium a paint of Mo and Zr powder which is fired above 1520.degree. C but below the zirconium-niobium liquidus temperature of 1740.degree. C. Such coating is used in making an improved seal by juxtaposing the metal body to the ceramic body, applying a powdered alumina sealing glass or frit and firing to the melting temperature of the frit.

Abstract: An improved rectangular shaped pressed glass sealed beam lamp unit is provided which includes a molded projection disposed at a particular location on the lens and reflector members to provide more reliable hermetic sealing when joined together at their peripheries. Specifically, the molded projections are provided on the back sealing surfaces of each rim region to reduce unwanted deformation which otherwise occurs when these members are initially formed by pressing the glass in molds. Said molded projections disappear for the most part during the aforesaid heat sealing assembly although the glass material remains in the rim region after joinder.

Abstract: New sealant compositions for sealing end closures or inleads in ceramic envelopes are based on the system Dy.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -SiO.sub.2. These compositions will withstand metal halides used as arc materials up to temperatures exceeding 1200.degree. C, and make possible more efficient lamps of improved color rendition.