Abstract: An improved balanced mixer is provided for use in radio communication devices. The improved balanced mixer comprises a known Gilbert type mixer, a transconductance amplifier, a signal splitter, and a dual feedback structure from the pre-amplifier output to the input ports, thereby providing better linearity, that is, better input third order intercept point (IIP3), and improved impedance matching, without increasing the circuit noise figure.

Abstract: A manually operable hair-cutting tool is disclosed wherein a plurality of paired cutting blades operate together simultaneously to achieve cutting or thinning of hair. The hair-cutting tool preferably comprises three pairs of elongated cutting blades, the pairs separate from each other but provided with an element of being connected together at a pivot point and thereby forming a combination of a central pair of cutting blades and two outer pairs of cutting blades, such that the cutting blades operate together through movement of actuating handles on the central pair of cutting blades around the pivot point. The outer pairs of cutting blades can optionally be removed for operation of the hair-cutting tool as a traditional pair of scissors and for ease of sharpening.

Abstract: A transfer printing process is provided which both uses conventional equipment, and which can be used to add second level printing to an existing document such as a passport. All of the information to be applied in a second level printing procedure to a base sheet is assembled as a complete image. The image is printed in reverse, as a stable mirror image, onto the coated surface of a release paper by a conventional laser printer. The release paper carrying the reversed image and the base sheet are then placed into a heated press, with the image adjacent the base sheet. By the use of heat and pressure the image is transferred from the release paper onto the base sheet. The release paper is then removed, leaving the second level printed image on the base sheet.

Abstract: A method of detecting outliers measured during progression of an activity of an entity from one point to another point, comprising measuring activity at a point in a first dimension, measuring the same activity at the same point in at least a second dimension referenced to the same time as measuring the activity in the first dimension, and rejecting outliers which have values outside a maximum expected difference between the activity measured in the first and second dimensions.

Abstract: Shaped bodies containing particulate iron materials, such as cast pellets, briquettes and the like, with sufficient strength to withstand temperatures of up to at least 1000° C. can be obtained by using a fully hydrated high-alumina cement as the binder. The strength of the pellets at elevated temperatures can be further enhanced by adding small amounts of bentonite, silica fume or other suitable supplementary cementing materials, and super plasticizer. The iron particulate materials, typically having a size range of from about 0.01 mm to 6 mm, include ore fines, sinter fines, BOF and EAF dusts, mill scale, and the like. Powdered carbonaceous material, such as ground coal or coke, may also be added to the pellets. The shaped bodies are suitable for use in blast furnaces, basic oxygen furnaces, and in DRI processes.

Abstract: A method of determining a connection between a data emitting device and a network device which may carry the data, wherein the network device is comprised of a store for a data source address of a last frame transmitted to the network device and an input traffic count comprising (a) periodically reading the data source address, (b) periodically reading the input traffic count, (c) determining whether the data source address has always stayed the same, (d) in the event the data source address has always stayed the same, determine whether the traffic count has exceeded a predetermined threshold, (e) in the event the result of step (d) is true, indicate that the data source address identifies with acceptable probability a data emitting device directly connected to the network device.

Abstract: The present invention provides a dichroic surface with a pointed resonator cross grid pattern that offers enhanced bandwidth and a sharper response between frequency bands. The dichroic surface is fabricated as a self-adhesive decal, conforming the dichroic surface to the surface of the reflector antenna.

Abstract: A kit for humanitarian demining operations and explosive ordnance disposal comprising a first sealed container holding a pre-measured amount of flammable nitroparaffin, and a second sealed container which can be opened and resealed, and which contains a product for sensitizing nitroparaffin to detonation using an initiation system. The second sealed container has a volume sufficient to contain both the pre-measured amount of flammable nitroparaffin and the product for sensitizing nitroparaffin to detonation. The kit may also contain an initiation system. Also disclosed is a method of using the kit to neutralize land-mines and unexploded ordnance.

Abstract: A drive mechanism for an antenna array mounted on a moving vehicle. The antenna array is mounted on a disc having two motors which, cooperatively, rotate the disc and rotate a number of antenna elements mounted on the disc. By rotating the antenna elements, the main lobe of the array may be scanned towards a satellite in the elevation plane. To track a moving source from a moving vehicle, one of the motors rotates the disc as a whole, thereby scanning the beam in the azimuth plane. Each antenna element is at an angle to the vertical so that, by rotating the disc to face the direction of the signal source, such as a satellite, a better signal can be obtained.

Abstract: The present invention relates to a metal oxide semiconductor (MOS) varactor that takes advantage of the beneficial characteristics of MOS varactors to provide a high maximum to minimum capacitance ratio. By coupling in parallel at least one pair of MOS varactors with similar but shifted capacitance voltage (C-V) curves, the resulting capacitance is generally linear while preserving the desirable large capacitance ratio. A pair of MOS varactors, one with a p+ type gate and one with a n+ doped gate connected in parallel approximates the desired result. However, by adding further varactor elements, with their threshold voltages shifted by either implanting specific properties in their bodies or by providing offset voltages, a more linear C-V curve is attained while preserving the desired capacitance ratio.

Abstract: A circuit for correcting baseline wander in a transmitter which includes a main signal current driver driving a first winding of a two-winding transformer which first winding is in parallel with a termination impedance matching load, in which a compensation current driver is coupled in parallel with the main signal current driver for adding its current to current of the main signal current driver. A correction signal control input is provided to the compensation driver. A sample-and-hold circuit is connected across the first winding, an error amplifier having a first pair of inputs is connected across the first winding and a second pair of inputs are connected to the output of the sample and hold circuit. These provide an error signal resulting from a difference of signals appearing at its respective pairs of inputs.

Abstract: A method and an apparatus relating to a PLL circuit for frequency synthesizer applications. By using a composite PFD large and small phase variations between a reference signal and the divider output are compensated for. The composite phase frequency detector (PFD) has both a digital phase frequency detector (digital PFD) and an analog phase detector (analog PD) with the digital PFD compensating for large phase differences and the analog PD compensating for smaller phase differences. The PLL automatically chooses between these two components in the composite PFD by controlling the pulse width of the divider output. This is accomplished by synchronizing the dead zone of the digital PFD with the active pulse width of the divider output and by similarly synchronizing the phase detector window of the analog PD to be within both the dead zone of the digital PFD and the active pulse width of the divider output.

Abstract: A sensor head with multiple sensors for ACFM based crack detection and sizing. An alternating current electromagnetic yoke is used to induce a uniform magnetic field on the surface of the test piece. A reference coil in the sensor head detects the background field strength of the magnetic field. Multiple sensors, the axis of each of which is in an angled relationship to the reference coil, detect variations in the magnetic field. The sensor coil axes can be chosen to detect and size both angled and straight cracks.

Abstract: A modular transportable collective protection system for the decontamination and containment of personnel in a toxic free area. A contamination containment area is provided through which personnel are decontaminated prior to entering the toxic free area. The migration of contaminants is prevented by causing a purge of clean filtered air from the toxic free area to the contamination control area and to the exterior environment. A blower and filter unit provides air to the toxic free area to maintain an over pressure therein, ensuring that all entry to the toxic free area is through a flow of clean air.

Abstract: A flexible mounting for use in the forming section of a twin forming fabric paper making machine consisting essentially of a base member supported by the paper making machine structure to which is attached a flexible C-shaped beam. The C-shaped beam has one edge attached to the base member, and a fabric contacting blade attachment means at the other edge. A pressurized loading tube is located within the C-shaped beam between the base member and the second edge of the C-shaped beam. When the pressurized loading tube is loaded, the C-shaped beam flexes thus allowing the blade to move initially into contact with a forming fabric. As the pressurized tube is further loaded, the contact face of the blade is moved into further engagement with the forming fabric. In a preferred construction, the wrap angle of the fabrics at or about the blade leading edge can be minimized. The mounting thus can diminish wear of the fabric as it passes over the blade.

Abstract: Audio signals are presented to a user by separating the audio signals into plural discrete frequency components extending from a low frequency to a high frequency, translating each of the frequency components into control signals, and applying the control signals to an array of light emitting devices for sensing by the user.

Abstract: An apparatus is provided for processing large hay bales of approximately 750 kg to produce smaller recompacted manageable units to facilitate shipping in containers. The apparatus provides means for cutting the bales into at least two slabs, preferably three slabs, and means for cutting those slabs into two approximately equal pieces. Means are provided for each piece to be recompressed, strapped and cut again to provide units having an approximate weight of 35 kg.

Abstract: A controller controls a switch bank which can shunt a voltage source in parallel with each fuel cell in a stack. By controlling the voltage of the voltage source, the current through the fuel cell is directly controlled. By increasing the anode potential of the fuel cell through control of the voltage source, poisons deposited on the electrocatalyst are removed, thereby rejuvenating the fuel cell. Each fuel cell in a stack can be treated in turn, causing a reduction of the effects of electrocatalyst poison on stack performance.

Abstract: An improved edge-triggered fully digital delay locked loop (DLL), which maintains reliable synchronization from startup and in spite of system clock jitter is described. An internal clock signal is synchronized with a reference clock signal by propagating the reference clock signal through a variable digital delay path. A wide phase detection region surrounds a selected rising edge of the internal clock signal. The DLL loop is open as long as the internal clock signal and a target edge of the reference clock signal are not simultaneously within the phase detection region. To achieve a DLL locked condition, the variable delay is increased from a minimum setting until the edge of the phase detection region is shifted in time just past the target edge of the reference clock. Once the DLL loop has been closed, a clock jitter filter is enabled to reject reference clock jitter effects on the DLL locked condition.

Abstract: A method and system for determining canopy coverage to a golf green to assist in increasing sunlight exposure of the green. The system allows users to enter data regarding the golf green, surrounding foliage, and other topographical and man-made features surrounding the green. The system can then plot the sun's path for a specific date and simulate shadows cast on the green by the surrounding foliage and features. Furthermore, the system allows the user to generate what-if data, allowing projected effects on canopy coverage to be viewed before any modifications to the canopy are carried out.