Abstract: A four-operator sound synthesis integrated circuit comprises a first through a fourth sound synthesis operator, a first programmable multiplier connecting the output of the first operator to the input of the second operator, a second programmable multiplier connecting the output of the second operator to the input of the third operator, a third programmable multiplier connecting the output of the third operator to the input of the fourth operator, a fourth programmable multiplier connecting the output of the first operator a first input of a four-input adder, a fifth programmable multiplier connecting the output of the second operator a second input of the four-input adder, a sixth programmable multiplier connecting the output of the third operator a third input of the four-input adder, and a seventh programmable multiplier connecting the output of the fourth operator a fourth input of the four-input adder. The product of the combination is taken from the output of the four-input adder.

Abstract: A satellite network receiver connected to receive video and audio programs and commands from orbiting satellites through a steerable dish antenna. Commands are alternatively received by the satellite receiver via pager radio service or phone wire from a network controller that uplinked the satellite programming. All user controls are eliminated from the satellite receiver and the network controller uses its command capability to steer the users antenna and to analyze and initiate diagnostics performed on various parts of the satellite receiver.

Abstract: A tone generator clears all registers in a twenty-nine stage device so that the previous results are not used in the calculations for a next tone sample. A series approximation of a desired complex sound waveform is achieved by calculating the contributions of twenty-nine time steps back in time. Twenty-nine different address phases are respectively applied to twenty-nine stacked arithmetic units. Each arithmetic unit comprises a first adder that inputs the output of a previous arithmetic unit and the input of the previous arithmetic unit. A second adder inputs the result from the first adder and one of the twenty-nine address phases. The second adder then reads a waveform generator connected to a multiplier that is controlled by a common multiplication factor "B". The output of the twenty-ninth unit produces the desired tone without any of the stacked units feeding back any signals.

Abstract: An arc lamp comprises an electrode assembly with O-ring seals that seal in xenon gas within a glass tube envelope and shaped electrode that, together with a contoured tube geometry inside the glass tube envelope near the electrode, will aerodynamically redirect the supersonic forces of gas ignition to reduce the mechanical impact pulses that would otherwise ultimately work the electrode assembly out of the end of the glass the envelope.

Abstract: An antenna system comprises a stack of elements that include a GPS patch antenna on a groundplane with an associated low-noise amplifier (LNA), a first Faraday shield of flat ribbon cable covering a first ferrite rod magnetic field antenna, a second ferrite rod magnetic field antenna separated from and orthogonal to the first ferrite rod magnetic field antenna, a second Faraday shield of flat ribbon cable covering the second ferrite rod magnetic field antenna and having a LNA for each of the ferrite rod magnetic field antennas. A third Faraday shield is positioned between the first and second ferrite rod magnetic field antennas. All the Faraday shields are connected to ground such that there are no loops that may act as shorted turns to avoid desensitizing the ferrite rod magnetic field antennas.

Abstract: A GPS receiver downconverter combines on a single integrated circuit, a first super-heterodyne mixer, a voltage controlled oscillator, a phase locked loop, a pair of quadrature mixers and a pair of quantizers with in-phase and quadrature-phase sampler outputs operable at twenty-five MHz and 2.5 MHz. Emitter-coupled logic and special low-voltage bipolar semiconductor technology are combined for 3.3 volt operation at under one hundred milliwatts.

Abstract: A drop-in arc lamp assembly comprising an arc lamp with fitted cathode and anode heat sinks each including a thin-wall copper strip that is brazed in pleated folds between inner and outer cylindrical rings to create cooling fins. The drop-in lamp assembly also includes an insulative sleeve in which the arc lamp and heat sinks are disposed and a pair of connection bushings piercing the wall of the sleeve and providing an electrical connection to the arc lamp outside the sleeve. A flush-mount receptacle for the drop-in lamp assembly includes a housing with a fan axially positioned behind the arc lamp and heat sinks when they are in place in the sleeve and dropped-into the housing. A glass epoxy board attached to the housing supports and insulates electrical terminals that contact the bushings to power the arc lamp. The arc lamp includes a copper heat conduction flange that surrounds a front window reduced in diameter from the diameter of the arc lamp.

Abstract: A filter-purifier that removes particles as well as trace amounts of moisture, oxygen, and other chemical impurities from a gas stream. The filter-purifier includes a removable canister that contains a purifying medium and a pair of sealing poppet valves that automatically close when the canister is removed from an in-line block body. The block body includes gas line fittings with close gland-to-gland separations, since the canister is off to one side and not positioned directly in line between the glands.

Abstract: An improved navigation satellite receiver with a digital channel processor including a triple carrier mixer with an early carrier mixer, a punctual carrier mixer and a late carrier mixer all connected to receive I and Q sample outputs from an IF downconverter. A triple carrier numeric controlled oscillator (NCO) includes an early carrier NCO, a punctual carrier NCO and a late carrier NCO for synthesizing three independent local carrier frequency outputs that are separated in phase from one another. A triple code mixer connects to the triple carrier mixer and comprises an inphase early-carrier early-code mixer, an inphase punctual-carrier punctual-code mixer, an inphase late-carrier late-code mixer, a quadrature early-carrier early-code mixer, a quadrature punctual-carrier punctual-code mixer, and a quadrature late-carrier late-code mixer with corresponding outputs for each mixer.

Abstract: A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at the center of said media, a plurality of servo grooves on at least one of said sides of said media that have stitched patterns that will alternate on-and-off at twenty kilohertz in the presence of a constant, unmodulated light source. The diskette is magnetically formatted with reference and data tracks recorded in such a way that extremely accurate position determinations can be made by looking at the analog amplitude of the detected tracks and comparing them at different head positions.

Abstract: A ball transfer cube includes a prismatically shaped cubed housing, a bearing race, small ball bearings, a main ball bearing and a housing cap for insertion into a prismatically shaped grating used by shipping companies.

Abstract: A wet indexer for receiving a cassette of wafers from a previous processing station that have not been allowed to dry. The wet indexer then keeps the wafers submersed in processing solution before and during indexed transmission to later cleaning stations.

Abstract: An antenna system embodiment of the present invention comprises a curved dipole antenna stood off at its center by a printed circuit board assembly containing a pre-amplifier. The curved dipole antenna is implemented with a single-sided flexible circuit and is anchored at its four free ends to a sheet metal base for a groundplane. The printed circuit board assembly containing the predetermined amplifier is fixed perpendicular to the sheet metal base and has a tab that engages a slot in the center of the single-sided flexible circuit for electrical connection of a pair of orthogonal dipoles patterned on one side of the flexible circuit.

Abstract: A system embodiment of the present invention comprises a fixed and a roving pair of four-observable GPS receivers and a communication link between them for double differencing code and carrier measurements. Carrier phase integer ambiguities are resolved efficiently by searching the simultaneous narrow-lane intersections of both the L1 and L2 wave fronts propagated by the GPS satellites being tracked. External constraint information, such as elevation, is additionally used to speed up integer ambiguity resolution. Data between the reference station and the rover is communicated in compressed form at a regular interval, e.g., once a second at each epoch, and demi-measurements of carrier phase are obtained more frequently, e.g., ten times a second, and used to propagate solutions between epochs.

Abstract: A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at the center of said media, a plurality of servo grooves on at least one of said sides of said media that have stitched patterns that will alternate on-and-off at twenty kilohertz in the presence of a constant, unmodulated light source. The diskette is magnetically formatted with reference and data tracks recorded in such a way that extremely accurate position determinations can be made by looking at the analog amplitude of the detected tracks and comparing them at different head positions.

Abstract: A surveyor range pole, for example, equipped with a GPS receiver and antenna mounted at the top end, a battery mounted at the bottom end to better balance the pole, a tilt sensor and a direction sensor. The tilt sensor and direction sensor provide information about the vector that lies between the top and the bottom points of the range pole. The GPS receiver computes the position of the top end of the range pole from GPS satellite signals received by the GPS at the top end, and then computes the position of the bottom end of the range pole with the vector information. A variable length, telescoping range pole includes a linear transducer for automatically measuring the overall length of the range pole and contributing that length information to the vector calculation.

Abstract: A hollow-walled cylindrical stainless steel vacuum-insulated funnel with a flat bottom through which a float valve and screen check and filter the gravity flow of liquid nitrogen out through a drain pipe in the bottom. The bottom of the funnel has a small lip raised all around the small pipe outlet to prevent any water condensation inside the funnel from dripping into the EDX dewar. The pipe outlet pierces a dewar stopper and can be permanently left in place on top of a dewar. The hollow-walls of the funnel are packed with foil-backed film in laminations to reduce radiation heat transfer between the funnel's inside and outside walls. A vacuum is drawn inside the hollow walls to minimize heat conduction.