Abstract: An all glass sealed beam headlamp unit is disclosed having polygon shaped lens and reflector members which is capable of being alternately sealed together with an adhesive as well as being fusion sealed by reason of the sealing rim construction being employed. Specifically, the cooperating and opposing sealing rim surfaces of both members include planar sealing surfaces located at the outer periphery which extend longitudinally without interruption around all sides of said members along with rib elements projecting forwardly from the planar sealing surface at all corners of the lens member with said rib elements being located at the inner periphery of said lens member for physical abutment with inner edge of the planar sealing surface located on the reflector member at the corner locations.

Abstract: To control the operation of a piezoelectric relay, control circuitry is disclosed for direct ohmic connection to a utility AC source to draw the minimal power required to actuate the relay's bimorph member pursuant to selectively switching power current through either one of two separate loads. The control circuitry, which is largely implimented in a single integrated circuit chip, utilizes isolating resistance and the capacitances of a voltage doubler circuit and the piezoceramic plate elements for transient suppression and circuit protection.

Abstract: An improved sealing construction is provided for an all glass lamp unit utilizing lens and reflector members which enhances the mechanical strength and hermetic seal when these lamp components are fusion sealed together. Specifically, the sealing rim surfaces of said lamp components are each provided with cooperating and opposing rib elements to permit direct physical abutment therebetween and thereby avoid forming void spaces in the sealing rim region when the fusion seal is made.

Abstract: A skin tanning lamp construction of a fluorescent type utilizing a combination of two different phosphors to provide efficient artificial skin tanning along with improved color rendition. The particular phosphor combination can be utilized as a blended mixture having a sufficient level of a phosphor constituent to impart some visible radiation in the red color region to the composite lamp emission.

Abstract: An automated inspection system is described utilizing a plurality of laser beams which contact the bottom edge of the object being inspected to detect various flaws or defects which may exist in said bottom surface. Said laser beam patterns are further compared with the laser beam patterns obtained from another object of the same type and known to be without defects in order to determine both defect depth and type defect. Objects being inspected are moved passed a detection station utilizing a flat horizontal surface containing a pair of slots aligned generally perpendicular with respect to each other and with the laser beams projecting in opposite directions along the length of each slot and further aligned at a slight angle from said horizontal surface in order to contact the bottom edge of said moving object, and with photodetection means being positioned to intercept each of the projected laser beams after contact with the moving object.

Abstract: A class of non-stoichiometric class of cerium and terbium co-activated magnesium aluminate phosphors is disclosed which are particularly useful in low pressure type fluorescent lamps. Said phosphor materials can be further combined with other phosphors to produce white color illumination in said type lamps. A general method for preparation of said phosphor materials is disclosed wherein the emission characteristics can be regulated to advantage.

Abstract: Increased optical transmission is provided for a body of optically transparent polycrystalline alumina by coating at least one major surface of said alumina body with a solid glaze coating and subsequently melting said coating at elevated temperatures to dissolve the surface alumina grains in physical content therewith to provide a smoother surface when the coating residue has been removed. More particularly, a solid glaze coating is first deposited on said major surface of the alumina body and the coated alumina body thereafter heated to sufficiently elevated temperatures for the glaze liquification whereupon surface alumina grains in physical contact therewith are dissolved in a manner which reduces the high spots on the individual surface alumina grains without materially introducing low spots at the grain boundaries and wherein the individual alumina surface grains have been preferentially etched in certain of the crystalline axis directions.

Abstract: A class of non-stoichiometric class of cerium and terbium co-activated magnesium aluminate phosphors is disclosed which are particularly useful in low pressure type fluorescent lamps. Said phosphor materials can be further combined with other phosphors to produce white color illumination in said type lamps. A general method for preparation of said phosphor materials is disclosed wherein the emission characteristics can be regulated to advantage.

Abstract: Zero crossing synchronous AC switching circuits are provided which employ piezoelectric ceramic bender-type switching devices for use in supplying loads of a resistive, inductive or capacitive nature. The circuits include zero crossing sensing sub-circuits for sensing the passage through zero value of a supply source of alternating current voltage and/or current and for deriving zero crossing timing signals representative of the occurrance of the zero crossings. The zero crossing timing signals are employed to control operation of a bender energizing potential control sub-circuit for selectively controlling application or removal of a bender energizing potential across the piezoelectric bender member of the bender-type switching devices.

Abstract: A fluorescent lamp utilizing a dual phosphor layer coating is disclosed producing efficient white color illumination at a lower cost than conventional phosphor coatings of the same type. The base layer in the phosphor coating comprises a conventional calcium haloapatite phosphor whereas the top phosphor layer comprises a tri-phosphor blend including a lanthanum cerium orthophosphate phosphor activated with terbium ion as the green color component along with a modified europium-activated yttrium oxide phosphor as the red color component.

Abstract: A pin grid array package is disclosed for an integrated circuit chip having a preformed main body member of a first synthetic organic polymer with a central cavity in which the integrated circuit chip is mounted, a metallized layer of a second synthetic organic polymer being bonded to said preformed main body member for electrical interconnection to the chip, and with terminal pins protruding from said preformed main body member as a means to further electrically interconnect the chip to exterior electrical terminals. A method to form said main body member is also disclosed using a thermoplastic polymer wherein the terminal pins along with a recessed base element provided in said body member for improved thermal conductivity are included when said main body member is first molded. A further method whereby the integrated circuit chip is assembled in said plastic carrier package is also disclosed.

Abstract: X-ray image converters using rare earth oxyhalide phosphors activated with terbium and/or thulium ion are described exhibiting improved brightness. Novel reflector means are provided in said x-ray image converter devices which reflect UV radiation incident thereupon back through the phosphor layer to associated readout or recording means sensitive to this wavelength radiation. A multi layer x-ray screen construction utilizing said improved reflector means is also described providing improved image sharpness while further reducing the crossover problem because more reflected UV radiation is being transmitted to an associated photographic film.

Abstract: The method and apparatus is disclosed to reduce the size of weld flash located at the junction of two workpieces each having a cylindrical contour and which have been butt-welded together. This method and apparatus employ roller members which positively feed the butt-welded workpieces through a slot opening smaller in width than the original diameter of the weld flash. In the preferred embodiment, a roller is spaced apart from the stationary block member to establish the slot opening while the workpieces are rotated while being fed through the opening in order to exert sufficient mechanical force with the sides of the slot opening to reduce the diameter of the weld flash by compaction during passage therethrough.

Abstract: A piezoelectric transformer signal coupler utilizes a drive circuit including an oscillator constructed to excite the primary of a piezoelectric transformer at its characteristic anti-resonant frequency. Positive feedback signals modulated by the time domain response characteristic of the particular piezoelectric transformer force the oscillator to lock onto its characteristic anti-resonant frequency despite variations thereof due to temperature drift and secondary loading. The resulting drive circuit is implementable as a miniature, low mass integrated circuit mountable on the transformer's piezoceramic wafer to create a signal coupler of a single integrated structure.

Abstract: Rare earth oxyhalide phosphors activated with thulium ion and further incorporating lutetium ion are described exhibiting improved optical resolution for the light image produced therefrom in X-ray image converter devices by reason of the particle size and shape of the phosphor crystals. A multilayer X-ray screen construction utilizing said phosphor material is also described exhibiting improved image sharpness attributable to said phosphor improvement. A preparation method is disclosed wherein the selected oxyhalide is recrystallized in a particular manner to produce phosphor crystals having a more polyhedral shape.

Abstract: A method and apparatus is disclosed to produce a blown glass article on a ribbon machine having a self supporting closed end. Said ribbon formed glass envelope has a cylindrical neck portion terminating at one end in a bulb portion of larger cross sectional dimensions and which includes the self supporting base end. The sides of said glass envelope can be curved or flat and with said self supporting base also being of a curved or planar contour. A novel mold construction permitting said glass envelope to be blown on a ribbon machine comprises a pair of cooperative halves forming the sides of the blown glass envelope in a central cavity in which further includes a separate base part located at the lower end of said cavity to shape the self supporting base, said base part of the mold being provided with reciprocal motion in a vertical direction.

Abstract: A method for producing the type lamp glass envelope used in a reflector lamp is disclosed which employs a ribbon machine. Said ribbon formed lamp glass envelope includes a cylindrical neck portion terminating at one end in a curved reflector portion closed by an integral flattened face portion of lesser curvature with light distributing elements being formed on the exterior surface of said face portion. In its preferred embodiments, the reflector portion of said lamp glass envelope is of the PAR type which can further include truncation of the parabolic shape with opposing substantially flattened parallel surfaces as well as face portions for said lamp glass envelope which can be circular or rectangular in shape.

Abstract: Rare earth oxyhalide phosphors activated with thulium ion and further incorporating yttrium ion are described exhibiting improved optical resolution for the light image produced therefrom in x-ray image converter devices by reason of the particle size and shape of the phosphor crystals. A multilayer x-ray screen construction utilizing said phosphor material is also described exhibiting improved image sharpness attributable to said phosphor improvement. A preparation method is disclosed wherein the selected oxyhalide is recrystallized in a particular manner to produce phosphor crystals having a more polyhedral shape.

Abstract: An improved furnace construction is provided permitting ceramic materials of various types to be processed at significantly elevated temperatures or being transported to the furnace enclosure. More particularly, novel transport means are provided for said ceramic materials to avoid problems with thermal shock and chemical attack here and for encountered during such processing of the ceramic materials. The novel transport means includes a furnace tray construction for the ceramic materials exhibiting greater abrasion resistance at the elevated furnace operating temperatures and which preferably cooperates with a hearth member in said furnace construction having comparable abrasion resistance.

Abstract: A method and apparatus for producing the type lamp glass envelope used in a reflector lamp is disclosed which employs a ribbon machine. Said ribbon formed lamp glass envelope includes a cylindrical neck portion terminating at one end in a curved reflector portion closed by an integral flattened face portion of lesser curvature with light distributing elements being formed on the exterior surface of said face portion. In its preferred embodiments, the reflector portion of said lamp glass envelope is of the PAR type which can further include truncation of the parabolic shape with opposing substantially flattened parallel surfaces as well as face portions for said lamp glass envelope which can be circular or rectangular in shape.