Abstract: In a real time, on-line pH measurement of an aqueous solution, a system provides continuous data on the physical condition of the pH sensor. The system includes a pH sensor having a membrane disposed in the process solution with a first external electrode attached to outer surface of the membrane and a second external electrode adjacent the sensor. The two electrodes in the solution are periodically driven by a short time duration dc signal producing a direct current between the two electrodes. The direction of the current through the solution is periodically reversed. This action results in electrolysis of the H.sub.2 O molecules of the solution between the two electrodes producing controlled changes in hydrogen ion concentration at the sensor. One current direction produces an increase in pH and the other direction produces a decrease in pH.

Abstract: A system includes a point-of-use container having a plurality of removable bins with each bin for a different recyclable material. A pickup container, transportable to a pickup location, has a plurality of bins corresponding to the point-of-use bins, each bin having a hinged lid with a catch for maintaining the lid normally closed. A truck body has a set of bins corresponding to the pickup container bins and an automated arm mechanism for picking up and inverting the pickup container over the truck body bins. A computer is programmed to control the arm mechanism to perform the required movements. A barcode on the pickup container is read and lid catch releases selectively operated when each bin is over a corresponding truck body bin to dump the contents of the container bins. The container is returned to its pickup location and released.

Abstract: An infrared scene projector has a cathode ray tube with a display screen coated with a luminescent phosphor material that produces radiation in the infrared spectrum when excited by the electron beam. The desired screen images are generated electronically, the screen is scanned by the cathode ray beam, and the intensity of the beam is modulated by the signal from the image generator.

Abstract: In a real time, on-line pH measurement of a process solution, a system provides a continuous data of the physical condition of the pH sensor. The system includes a pH sensor having a glass membrane disposed in the process solution and two electrodes in the solution adjacent the sensor. The two electrodes in the solution are periodically driven by a short time duration dc signal producing a dc current between the two electrodes. This action results in electrolysis ofo the H.sub.2 O molecules of the solution at the two electrodes and a resulting decrease in hydrogen ion concentration (a rise in pH value) in the region of the sensor. The sensor response to the increase in pH in the solution is a direct indicator of the complete sensor and system performance and is monitored and analyzed. Visual readouts and threshold alarm circuits are provided which indicate changes in the sensor response to the pH change indicative of a sensor or system degradation or fault.

Abstract: A patio door system uses a metal frame attached to a door jamb. A door panel to be installed in the frame includes a metal sill member and a metal jamb member. A pair of fixed door panel adapters is provided for insertion into the panel sill member when the panel is to be used as a fixed door panel. When the door panel is to be used as a sliding panel, a pair of wheel assemblies is installed in the panel sill member, thus permitting a single panel to be adapted as either a fixed panel or as a sliding panel.

Abstract: A compound containing a tall oil fatty acid, oleic diethanol amide, aluminum oxide abrasive material, and organo-treated bentonite provides a polish for metals, such as aluminum, having a uniform viscosity and the abrasive particles uniformly dispersed throughout the carrier. Water may be added to form a scratch removing compound. Mineral spirits may be substituted for the fatty acid in the scratch remover to form a prepolish compound.

Abstract: A lawn and flower bed divider system uses sections formed from PVC or the like including straight and curved sections. The sections are hollow and contain integral water and electrical wiring conduits. The ends include fittings to interconnect the sections to form a continuous divider. Sprinkler heads are disposed along the divider and connected internally along the divider. Lighting fixtures are installed along the divider and internally connected to wiring in the wiring conduits. The water conduits are connected to a water source and the wiring is connected to a low voltage power source.

Abstract: A protector for cable connectors has a double walled sleeve of flexible fabric material. Soft padding material is disposed within the double walls of the sleeve. Each open end of the sleeve includes strips of opposing hook and loop fastening material. In use, the sleeve is inserted over a connector and cable. When the connector is connected to its mating connector, the sleeve has its ends closed around the cable adjacent the connector. When the connector is disconnected, the sleeve is opened and moved to enclose the connector. The open end is closed and the other end closed around the cable.

Abstract: A cold cathode electron gun utilizes a metallic torus for electrostatic focusing of an electron beam. A nonconductive tube is disposed within and along the axis of the torus. A conductive aerodynamic body electrically connected to the torus forms an annular venturi in the tube and includes a face which serves as a high field emitting surface. High molecular weight gas is introduced into a proximal end of the tube at a stagnation pressure sufficient to produce supersonic flow thereby causing a vacuous gas region adjacent the emitting surface. The torus and emitting surface are driven to a very high negative potential by a Tesla transformer or the like, producing high field emission into the vacuous region. The electric field of the torus produces, from the emitted electrons, an electron beam which issues from the tube into the atmosphere.

Abstract: A security railing is formed from thick wall polyvinyl chloride pipe (PVC) having PVC tee, cross and elbow fittings providing flush joints. A PVC joint aligner and strengthener is inserted in and extends across each joint, The joints and aligners are chemically welded to form a unitary structure. Joint aligners may include a steel core.

Abstract: A method and apparatus for computerized numerical control of machine tools includes a computer program and a controller for establishing an arbitrary plane with respect to the principal planes for providing cutter radius compensation. The processor precalculates structured data portions of the program that affect motion of the cutter. The precalculated data is stored and, in coordination with other inputs, is utilized to control machine tool servo drives to provide a "determine position loop error" function.

Abstract: A lateral trailer tongue jack has a base plate for resting on a ground surface beneath a trailer tongue. The base includes a lateral channel iron track having a framework disposed over the track. A vertically oriented tubular socket has a wheel mounted at a lower end thereof which rides in the track. A lead screw disposed laterally across the framework is engaged with a threaded floating carriage within the socket. The socket accepts the lower end of a vertical tongue jack of the trailer. A crank attached to the lead screw is used to move the socket laterally along the track to align the trailer tongue hitch socket with the hitch ball of a towing vehicle.

Abstract: A system for real time, on-line dissolved oxygen (DO) measurement of a process solution provides continuous data of the physical condition of the DO sensor and of the entire system performance. A DO sensor is disposed in the solution with two external electrodes adjacent thereto. A time-varying low level signal is applied to one electrode producing a current through the sensor membrane and grounded electrode, which is detected by a cross-correlation circuit to monitor the membrane impedance. The other electrode is periodically driven by a short, low level dc pulse, producing electrolysis of the water between the two electrodes, and generating a small, repeatable amount of oxygen ions. The sensor response is analyzed providing a direct indication of the sensor and system performance.

Abstract: A method of registering a plurality of substrate boards in a laminated printed wiring panel to permit drilling for plated-through holes at centers of terminal areas, which have shifted from design locations during processing of the boards and panel, involves drilling of a small target pilot hole at a known location through a substrate board prior to etching of a printed wiring pattern thereon. A small disc of magnetically detectable material is inserted into the pilot target hole and a printed wiring pattern is then etched on the board. After etching of the drilled board, it is laminated with other printed wiring substrate boards to form a composite printed wiring panel. A magnetic detector using a transparent container with a small magnetic disc floated on the surface of a thin layer of water in the container is placed on a top surface of the board and moved to permit the magnetic disc to center over the embedded disc.

Abstract: An essentially neutral pH vehicle wheel cleaner for coated alloy vehicle wheels includes a builder, a surfactant, a buffer, a clarifier or mild abrasive, and a fragrance in water. The builder and surfactant interact to produce strong buffering to prevent a significant change in pH due to alkaline brake dust, road soil, and acidic road salts. A preferred embodiment utilizes tetrapotassium pyrophosphate as the builder, a sodium salt of sulfonated oleic acid as the buffer, and a ethylene oxide adduct of octylphenol as the surfactant. Various fragrances are disclosed.

Abstract: A jewelry pendant device includes a vertical square stem having an open loop at an upper end and a retainer at the lower end. A plurality of decorative beads is threaded on the stem to fill the space between the retainer and the open loop. Releasing the retainer permits interchange of the beads to customize the pendant for the wearer. The beads may be cubical and may have letters or symbols on the faces thereofo. The open loop may be attached to ear hooks or clips, bracelets, necklaces, pins or the like to permit the pendant to be worn.

Abstract: An improved dental bridge and method of construction thereof is disclosed. The bridge has no exposed metal. The abutment teeth are prepared and have opposing notches cut into the occlusal surfaces thereof. Impressions are made and a master and opposing model prepared therefrom. The model abutment teeth are prepared as dies and a refractory model then developed from the master model. A metal pontic rod is prepared, opaqued, and installed in the refractory model notches. After coating the abutment teeth and pontic rod with a porcelain mix and curing, all porcelain crowns are built over the abutment models and one or more all porcelain pontics are built over the pontic rod. After curing and glazing of the dental bridge, the refractory model is cut away from the bridge.

Abstract: A plastic skylight having a central dome and a pair of standing seam edges is suitable for installation in metal standing seam roofs and shingled roofs without a curb. The standing seam edges are joined to adjacent metal standing seams with the same covered by battens. The other edges of the skylight form flat flanges overlapping adjacent metal panels. When used on a shingled roof, step flashings and anchor clips are fastened to the plastic standing seams. The skylights may be clustered to form sunroofs.

Abstract: A sensor for sensing the quantity of refrigerant in a closed loop refrigeration system, with the sensor having attachment means on a lower portion thereof such that it may be installed in direct communication with the refrigerant line of the refrigeration system. The sensor has a hollow interior portion defined by generally cylindrical sidewalls, in which interior portion a float of conductive material is disposed, with the float being free to rise on the surface of liquid refrigerant entering the interior of the sensor from the refrigerant line. At least one electrode is disposed in the interior of said sensor, in a position such that it will be contacted by the float at the time a certain refrigerant level is reached in the interior of the sensor.