Abstract: A solder immersion chamber in a solder crater/leveler includes a solder manifold having upper and lower solder chambers, from which solder is directed onto the top and bottom surfaces of printed circuit boards conveyed therebetween. The solder immersion chamber has a pair of driven rollers at either end thereof for conveying the printed circuit boards through the solder immersion chamber, and for damming and holding the molten solder within the solder immersion chamber. A pair of oil weirs is provided adjacent either side of the upper solder chamber for continuously flowing oil to flood the top surface of the molten solder in the solder immersion chamber. A skimmer skims oil from the top surface of the molten solder, and returns the separated oil to the pair of oil weirs.

Abstract: A totalization meter system for a water treatment device, the device having an inlet aperture and an outlet aperture, and a channel for channeling water between the inlet and outlet apertures. A flow reactive device is positioned in the channel and is exposed to the flowing water, and a signal generating member is positioned on the flow reactive device. A switch is positioned proximately to the flow reactive device, and is sensitive to the proximity of the signal generating member. The switch is able to communicate electric signals indicative of the motion of the signal generating member. A resettable processor having a performance threshold programmed therein and an output device is included. The microcontroller is in electrical communication with the switch for receiving electrical signals from the switch. The switch is capable of sensing the characteristics of the flow reactive device and communicates electrical signals representative of the characteristics to the microcontroller.

Abstract: Precipitation hardening (PH) stainless steels heat treatable to yield strength levels in the range of 200 ksi with exceptionally high fracture toughness are achieved in alloys consisting essentially of 12.25-13.25% chromium, 7.5-8.5% nickel, 2.0-2.5% molybdenum, 0.8-1.35% aluminum, not over 0.05% carbon, not over 0.10% silicon, not over 0.10% manganese, not over 0.010% phosphorus and with especially critical amounts of not over 0.0020% (20 ppm) nitrogen, not over 0.0020% (20 ppm) sulfur, not over 0.0026% (26 ppm) nitrogen plus sulfur; not over 0.04% titanium, and remainder essentially Fe.

Abstract: Multilayer rigid/flex printed circuits are fabricated from a novel basestock composite (10) comprising two copper conducting sheets (12, 14), bonded to insulator layers (16, 18) comprised of fiberglass sheets impregnated with an adhesive such as epoxy, wherein the insulator layers (16, 18) are both affixed to a release layer (20) is not coextensive with the borders of the insulator layers, then can the basestock composite be imaged and etched on the conductor layers to form conductor patterns (22) and the basestock can be cut at a point (24) internal to its borders and into the release layer (20) thereby separating two imaged and etched conductor layers (22), along with removal of the release material from the insulating layer.

Abstract: A mixed oxide ceramic product is made directly from a metal alloy of titanium, zirconium and/or hafnium and niobium, tantalum or hafnium, where the normally combustible alloy of titanium and zirconium or hafnium is passivated by the addition of more than about 7 atomic percent of niobium and/or tantalum and or vanadium which alloy can then be heated in air at atmospheric pressure to a temperature of from about 800 degrees C. to about 1500 degrees C. to produce an adherent monolithic ceramic containing product.

Abstract: A flexible shower arm assembly that allows the user to repeatably adjust the position of the shower head in three dimensions by configuring the shape of the shower arm attached between the water source, such as a shower pipe, and the water dispenser, such as a shower head. The particular position of the shower head, and the direction of the shower spray, can be modified by re-configuring the shape of the shower arm. The flexible shower arm holds the desired position until modified by the user. The flexible shower arm is sealingly attached to the shower pipe by a pipe connector nut, and is sealingly and pivotally attached to the shower head by a connection structure. The flexible shower arm assembly includes an elongated flexible member defining a fluid transfer path, the flexible member having a first end and an opposite second end.

Abstract: Apparatus for providing an admixture of first and second fluids has a first body having opposite ends, a chamber between such opposite ends, an inlet for first fluid into that chamber, and an aperture for the admixture at an end of that chamber. That apparatus also includes a second body having an inlet aperture for second fluid spaced from the first body, an outlet aperture spaced inside the chamber from the aperture for the admixture, and a fluid flow channel decreasing in cross-sectional area from the inlet aperture spaced from the first body to the outlet aperture inside the chamber between opposite ends of the first body. Such first and second bodies jointly comprise a flange structure at the first body and between the inlet and outlet apertures of the second body. An admixture flow channel increases in cross-sectional area away from the aperture at the end of the chamber.

Abstract: The point-of-use water treatment system for treating water to be dispensed from a container includes a filter media positioned adjacent a water input opening of the container, through which water is filtered into the container. The filter media includes a water soluble disinfectant positioned thereon or therein, with the preferred disinfectant tetraglycine hydroperiodide, chloramine-T, or calcium hypochlorite. The disinfectant dissolves in the water as it passes through the filter, and reduces the biological activity of microbiological agents in the water. A point-of-use method of the present invention which reduces microbiological contamination in a predetermined volume of water to be dispensed from a container which utilizes a filter media containing a water soluble disinfectant impregnated thereon is also disclosed.

Abstract: A method and apparatus for inter-round mixing in iterated block substitution systems is disclosed. The method involves optimizing inter-round mixing so that each data bit affects each other data bit in the same way. This is accomplished by applying a quick trickle permutation or a quasi quick trickle permutation to the data bits undergoing block substitution allocated to n individual substitution boxes.

Abstract: A method and apparatus for inter-round mixing in iterated block substitution systems is disclosed. The method involves optimizing inter-round mixing so that each sub-block of data affects each other in the same way. This is accomplished by applying a quick trickle permutation or a quasi quick trickle permutation to blocks of data allocated to n individual substitution boxes.

Abstract: The modulus of stretch af a fibrous rope is reduced by impregnating a pluity of spaced-apart segments of the rope with an epoxy plastic thereby to reduce the modulus of stretch of the segment equal to zero after curing the plastic. The overall modulus of stretch of a re-manufactured rope taken as a whole is proportional to the ratio of the length of an impregnated segment relative to a unit length of the rope.

Abstract: Methods of making high specific gravity shotgun shot and small arms projectiles from melts containing primarily tungsten and iron, and particularly including specific melting temperature depressants and using specific quenching both compositions are described and specific conditions and materials and methods for making high specific gravity shot pellets and projectiles by powder metallurgical techniques are described.

Abstract: Controllable oxidation of certain titanium zirconium alloys is achieved by utilizing minor proportions of niobium, tantalum or vanadium or mixtures thereof and articles formed therefrom can be partially oxidized to form a deep, hard monolithic oxide containing surface layer and further or completely oxidized to form a cermet or ceramic body respectively, which can be heated further to improve the ceramic bodies properties.

Abstract: An electrochemical gas sensor having a temperature sensitive element such as a thermistor arranged within the gas sensor in a temperature insulative fashion for preventing any variations in the temperature of the applied gases to be sensed to be immediately conveyed to the temperature sensitive element thereby providing accurate temperature compensation signals to be combined with the generated sensor electrical output signals. The temperature sensitive element or thermistor is mounted in a heat sink to the expansion membrane of the gas sensor to be responsive only to changes in the temperature variations imparted by the sensor electrolyte and not by the variations in the temperature of the gas sensor body and associated elements thereby providing correct temperature compensation signals without error producing time delays.

Abstract: An avionics unit is configured to be mounted in an aircraft cockpit for recording and displaying aircraft information. Front panel space is conserved on the avionics unit. The avionics unit includes a housing having an interior. At least one connector is located within the housing. The connector is configured to receive at least one removable storage cartridge. The avionics unit also includes an active front panel assembly having at least one display and at least one control. The active front panel assembly is swingably mounted to the housing, permitting the active front panel assembly to be selectively opened, to expose the housing interior for removal of the storage cartridge, and selectively closed, to enclose the storage cartridge within the housing interior.

Abstract: A system for generating variable substitution boxes from arbitrary keys for use in a block cipher system utilizes an initial set of linearly independent numbers to generate substitution tables. The initial set of linearly independent numbers is modulated with the bits of an arbitrary key through operations that result in final sets of linearly independent numbers to form the substitution tables.

Abstract: A laminar flow element for use in flow metering devices has a laminar flow element plug with an upstream end and a downstream end and a linear extent between the upstream end and the downstream end, the laminar flow element plug configured to be positioned within a base cavity with the upstream end oriented toward the direction of flow, and sensor taps through walls of the base cavity positioned inboard of the laminar flow element plug so that entrance effect is eliminated, error due to flow cross-sectional area differential is eliminated, and orifice effect is minimized, to produce a laminar flow with linear pressure drop across the sensor taps as a function of flow rate. Coaxial laminar flow guides are fixed coaxially about at least a portion of the length of the laminar flow element plug to increase the number of flow passages to enable linear measurements of higher flow rates.

Abstract: A filter housing has a series of linearly spaced resonators positioned in the housing. The resonators each include a conductive rod upstanding from a bottom wall of the housing. At least one coaxial cable portion has a first connecting section extending along a housing upper wall or housing cover, the cable portion having integral end sections including an inner conductor of the coaxial cable portion, extending variously into proximity to the conductive rods of a selected first two of the series of resonators, the first two of the resonators having at least one other resonator of the series of resonators extending therebetween. The periphery of the resonators may be configured variously with half or full circular or half or full elliptical peripheries. The filter may be diplexer or in higher degrees of multiplexing.