Abstract: Soluble zirconium and hafnium organic acid complexes are made by forming an aqueous mixture of a basic carbonate of either zirconium or hafnium and the organic acid such a propionic acid. The molar ratio of the organic acid to metal in the carbonate is greater than about 1.5. The mixture is heated with stirring to form the complex which is then recovered as a dry, free-flowing powder.

Abstract: Disposable prophy angles for use in combination with a reusable metal adapter on a contra-angle dental hand piece. The disposable prophy angles are assembled from three mass-produced components formed from plastic or other inexpensive material. Each disposable prophy angle is formed from a main body part having a nose portion and a barrel portion, a nose cap portion which with the nose portion forms an enclosed nose portion housing and an integral rotary part disposed in the enclosed nose portion housing which has a driven power input gear, bearing formations and a protruding prophy cup receiving button. Each reusable metal adapter has a shaft with gears mounted on opposite ends. One end of the adapter is inserted in the barrel portion with the gear on the inserted end in driving engagement with driven power input gear. The gear on the opposite end of the adapter is connected to the power output of a contra-angle dental hand piece.

Abstract: An improved carbochlorination process for the production of volatile metal chlorides is disclosed. When chlorine gas contacts a metal oxide or a mixed metal oxide in a reaction zone in the presence of carbon at elevated temperatures, an undesirable carbochlorination residue forms containing carbon in the reaction zone. After the build-up of a carbochlorination residue in the reaction zone occurs, the volume of the carbochlorination residue in the reaction zone is reduced by periodically introducing just chlorine and metal oxide or mixed metal oxide reactants into the reaction zone without introducing any additional carbon. These components react with a portion of the carbon in the carbochlorination residue so as to reduce the amount of the residue.

Abstract: A miniaturized silicon based thermally controlled vacuum sensor uses thin film resistors on a membrane in a minute measuring chamber to accurately detect vacuum pressures in the range of 760 Torr to 1.times.10.sup.-5 Torr. The configurations of the measuring chamber and gas diffusion port of the sensor structure insure that heat transfer from the membrane is predominately conductive over the pressure detection range to provide linear output up to 0.1 Torr. A microprocessor is used to control and measure power required to maintain a predetermined temperature differential between a sensing resistive element on the membrane and an ambient temperature sensing element of the sensor base from analog voltage and current values. Pressure detection errors introduced by ambient temperature variations are minimized by measuring power dissipated into the gas. Analog and digital converters for both current and voltage signals use a .SIGMA.-.DELTA.

Abstract: A laminating press for wood products includes at least one pair of heated drums rotating on parallel axes and an endless belt running around the drums, and a device for pressing a stack of materials to be laminated against the belt between the drums, wherein the belt consists essentially of a zirconium or titanium alloy having a thermal diffusivity of at least 0.08 cm.sup.2 /sec and Young's modulus below 20 million psi. Unplated, the belt material provides a non-stick surface with respect to melamine, and because it is unplated, the belt can be resurfaced when worn. Alternatively, the above materials are used in constructing plates for a platen-type laminating press.

Abstract: A rugged, flexible unit for generating a corona discharge includes a conductive central wire, flexible dielectric material, and a flexible conductive layer surrounding said dielectric material. The dielectric material may be advantageously formed of PTFE. The flexible unit may be conveniently cut from a long length of prefabricated insulated wire. In operation, an alternating current is supplied to the central wire and the outer conductive layer is grounded, such that a corona discharge is efficiently generated within and around interstices formed by the outer layer. The corona discharge may be used to ozonate oxygen-rich gas.

Abstract: A flow-through type ozone generating system has a fluid conduit and a source of alternating current for generating a corona discharge. An insulated wire may be used as an electrode within the conduit. PTFE is advantageously used as a dielectric material.

Abstract: Shot pellet or small arms projectile comprises 40-60% by weight of tungsten and 60-40% by weight of iron formed by sintering tungsten containing powders having median particle sizes below 6 microns to form a material consisting primary of an intermetallic compound of tungsten and iron or of a metal matrix of iron surrounding tungsten containing particles.

Abstract: Multilayer rigid flex printed circuits are fabricated from a novel basestock composite comprising two copper conducting sheets, bonded to insulator layers comprised of fiberglass sheets impregnated with an adhesive such as epoxy, wherein the insulator layers are both affixed to Kapton layers wherein said Kapton layers are not coextensive with the borders of the insulator layers. The basestock composite can then be imaged and etched on the conductor layers to form conductor patterns, laminated or coated with a coverlay of dielectric material, and the basestock can be cut at a point internal to its borders and into the Kapton layers thereby separating two imaged and etched conductor layers.

Abstract: A filter apparatus includes a cylindrical reservoir with a pistol grip handle. A conical funnel is releasably mounted on the reservoir by quick release threads. A plurality of radially extending support ribs within the funnel support a porous filter disk secured between the reservoir and the funnel. A depending annular seal ring on the reservoir defines a sealing edge which engages the filter disk and seals it against a seal surface and seat on the interior surface of the funnel.

Abstract: A binary, ternary and/or quaternary substantially lead-free tin alloy composition that may be used as outer sheath material in various explosive-pyrotechnic linear products, such as ignition cord, mild detonating cord (MDC) and linear shaped charge (LSC).

Abstract: A portable water purification system has a prefiler, a pumping unit, a reverse osmosis unit, a microbial control unit and a post filter for removing nuclear, biological, chemical and other contaminants from a water source. The hand operated pumping unit has a feed water cylinder and a concentrate cylinder to control ratios between intake and concentrate volumes. The system further prolongs the life of components by reducing the level of contaminants in contact with parts of the system.

Abstract: A relay test assembly constructed of a majority of parts adapted to be injection molded and capable of withstanding large and rapid swings in temperature and humidity. These include a central approximately cylindrical body portion having a plurality of channels running therethrough generally-parallel to the axis of the body portion. The channels provide easy entry to leads of a relay. Each channel includes a spring contact which may be brought to bear against a lead positioned in the channel to provide positive electrical contact to the lead so that connection may be made to sources of potential or current. A second set of contacts surrounds the first set and may be brought to bear against a lead positioned in the channel to provide a second more positive electrical contact to the lead closer to the relay through which testing may be conducted. A sleeve positioned about the body portion is shaped to move the springs into contact with the relay leads and retract the springs.

Abstract: Zirconium or zirconium alloy components of a cylindrical shape are cleaned with an ice blasting process to produce a defect-free bondline in multi-layered tubing suitable for nuclear fuel cladding and the chemical processing industry. The ice blasting process improves the integrity of the metallurgical bond by removing foreign contamination that can initiate non-bonding defects.

Abstract: A methods and apparatus for exhausting flue products and removing condensate from a combustion of air/gas mixtures provide a condensate collecting pan for flue products. That pan is provided with an inlet for flue products and condensate, and with an outlet for flue products spaced from that inlet. That inlet is provided with a larger cross-section for flue product and condensate flow than the outlet. A space is provided in the pan for a flow of flue products from the inlet at a substantially even velocity across the larger cross-section of the inlet to the smaller cross-section outlet. Condensate collecting in that space is removed from the pan.