Abstract: A polarized media electronic air filter assembly has an electronics box mounted along one side by a slid-in fit into an open, receiving channel. Arcing between screens is reduced by using a relatively resistive material for at least one of the screens exposed to arcing.

Abstract: This invention relates to a portable, battery-operated ion generator featuring an electronic high voltage system which uses extremely low battery power. The ion generator can be made in the form of a pendant using a standard 9-volt alkaline battery, which can last for several months of continuous operation. The ion generator can also serve as a dust collector for air purification. In particular, the dust collecting electrode is removable for ease of cleaning.

Abstract: An electric polarizing air filter has a charged screen of high resistivity to suppress avalanche discharge and permit use of a higher polarizing voltage.

Abstract: This invention relates to a portable, battery-operated ion generator featuring an electronic high voltage system which uses extremely low battery power. The ion generator can be made in the form of a pendant using a standard 9-volt alkaline battery, which can last for several months of continuous operation. The ion generator can also serve as a dust collector for air purification. In particular, the dust collecting electrode is removable for ease of cleaning.

Abstract: An air cleaner is described wherein an ion wind is generated by an ionizing element and directed to pass over a dust collector surface. By proper design and adjustment of the ionizing element and collector, the unit can be operated without emitting charged particles, if any, in other than the direction of orientation of the dust collector surface and thus avoiding smudging of the surrounding walls. The collector may be cylindrical in form and may be separately detachable, rendering it readily available for cleaning.

Abstract: A pleated filter is provided with electrically conductive fibrous material that releases ions to improve trapping efficiency. The edges of folded filter media are rendered emitting as by attaching conductive strings to the edges of the folds. The ends of the fibers in the strings are left exposed and, by applying high voltage on these strings, ions may be produced which charge dust particles to improve the filter's efficiency. Alternately, the pleated medium itself provides ion-emitting fiber ends along folded edges that have been rendered conductive.

Abstract: An electrostatic precipitator type filter is combined with replaceable, polarizable trapping media. In one aspect of the invention, the media is fitted between polarizing plates. In another aspect, the media is coated in sections to form a conductive surface which serve as the equivalent to the charged plates of the precipitator. These electrodes may be alternately displaced to provide a ready means to effect electrical connections.

Abstract: A pleated filter is provided with electrically conductive fibrous material that releases ions to improve trapping efficiency. The edges of folded filter media are rendered emitting as by attaching conductive strings to the edges of the folds. The ends of the fibers in the strings are left exposed and, by applying high voltage on these strings, ions may be produced which charge dust particles to improve the filter's efficiency. Alternately, the pleated medium itself provides ion-emitting fiber ends along folded edges that have been rendered conductive.

Abstract: A fastener for coupling two members together is provided with a rotatable core carried by a first member and a protruding elbow for insertion through an elongated slot in the second member. By rotating the core, the elbow is caused to swing over the outer surface of the second member, adjacent the slot, coupling the two members together. The inner, member-engaging surface of the elbow is tapered to form a ramp-like surface that, with rotation, draws the two members together and frictionally fixes the elbow in its engaged position. The latch core when installed in a tubular first member may be provided with resiliently based, expanding locking members positioned adjacent to the core to secure the latch within the hollow core of the tubular first member.

Abstract: An air filter assembly includes an ion source positioned adjacent to the front face of an air filter to inject ions into the arriving air flow. The ions penetrate upstream sufficiently far to have ionized the air and charge particles before their arrival at the filter trapping medium. The ion source is preferably sufficiently thin as to allow the filter with the ion source mounted thereon to be inserted into a filter slot in a duct of an air handling unit.

Abstract: A patch for a ducting wall has two sealing portions, one of which may be bent to pass through a torn opening in the ducting wall. When jointed by a coupling means, the two sealing portions may pinch the ducting wall surrounding the torn opening and provide a barrier against the escape of air through the opening.

Abstract: A high efficiency electronic air filter is disclosed in which pads of dielectric fibres are sandwiched between electrically charged, ionizing elements and grounded screens. The ionizing elements charge the dust particles passing through the filter and at the same time polarize the fibrous pads. In this way, the charged particles are attracted and collected on the fibrous pads with improved efficiency.

Abstract: An ionizing type air cleaner having ionizing needle(s) and a collector element. The collector element is made of either many conducting elements with isolating resistors or a single high resistivity element in order to prevent electric shock when touched.

Abstract: A battery charging system is disclosed including an electronic polarity sensing, monitoring and alarm circuit and a special polarity reversing relay connected between two pairs of booster cables. When one of the pairs of cables is connected to a voltage source and the other pair of cables is connected to a battery to be charged, the circuit and relay automatically connect the source and battery with the correct polarity, even if the battery being charged has a very low voltage across it. The circuit also includes an automatic reset feature which resets the relay to a neutral or off position when either of the pairs of cables is disconnected from a voltage source or battery.

Abstract: This invention relates to an electronic air filter of the charged media type in which the filter media and screens form a disposable cartridge. The high voltage power supply, which is made long and slender, attaches to the side of the cartridge and it is powered by a low voltage power supply.

Abstract: This invention provides an improved electronic air filter comprising fibrous material such as glass fibers which are polarized by insulated screens. The screens are charged with high voltage provided by a power supply which is an integral part of the filter unit. This arrangement provides a filter with extremely low ozone emission.

Abstract: This invention features an automatic egg cooker in which one of the eggs to be cooked is continuously tested for consistency by being placed in an oscillatory system. The magnitude and duration of oscillations due to an initial displacement of the system are measured. An alarm is set to ring when the desired consistency of the egg is reached.

Abstract: This invention relates to a viscous damping arrangement for record player tone-arms in which the fluid container is part of the arm and is located at the arm's center of rotation. A stationary sphere is immersed in the fluid and the container rotates around it.