Abstract: A method and chipset for tracking a global navigation satellite system (GNSS) within the constraints of an indoor facility. The method includes receiving assistance information on the GNSS on a mobile communication system; and sorting orbiting satellites within the GNSS by elevation angles. Additionally, lower elevation satellites are correlated within the GNSS prior to correlating higher elevation satellites.

Abstract: A method and chipset for tracking a global navigation satellite system (GNSS) within the constraints of an indoor facility. The method includes receiving assistance information on the GNSS on a mobile communication system; and sorting orbiting satellites within the GNSS by elevation angles. Additionally, lower elevation satellites are correlated within the GNSS prior to correlating higher elevation satellites.

Abstract: A particulate material is ground more efficiently using a mixture of at least two different sizes of yttrium-stabilized zirconia balls. The method facilitates preparation of photocatalysts with high activity.

Abstract: A substantially pure phase LaTaO4 photocatalyst is prepared by grinding precursors with mixture of at least two different sizes of high-density yttrium-stabilized zirconia balls to a very fine particle size and calcining the ground precursors. The LaTaO4 photocatalyst prepared by this method is useful in photolysis of water.

Abstract: Disclosed is a wireless communication device capable of being positioned in a wearable position adjacent a user's head. The wireless communication device may include a housing and an arcuate earmount coupled to the housing. The earmount may be configured so that it includes an overhanging portion and a hinge portion, the hinge portion electrically and mechanically coupling the earmount to the housing. A proximity sensor can be positioned on the overhanging portion and configured to detect proximity of a user's skin behind the user's ear. The sensor location for earmounted devices can provide that the sensor may be trapped between the user's ear auricle and the user's head as the earmount sits down on the top portion of the ear, which may result in accurate sensing activation. The device may be further configured to, for example, change a state based on whether the proximity sensor detects proximity.

Abstract: A wireless communication device for minimizing electromagnetic interference with hearing aid devices. The wireless communication device comprises a lower housing (112, 312, 412, 512, 612) and an upper housing (114, 314, 414, 514, 514) adjacent to the lower housing. The lower housing (112, 312, 412, 512, 612) supports a wireless transceiver (108, 202) capable of producing an electromagnetic field, and the upper housing includes an ear piece (104, 504, 604). For one embodiment the upper housing (114, 314, 514, 614) and all components supported by the upper housing consist of non-electromagnetic conductive material. For other embodiments, all electromagnetic conductive components of the upper housing (414, 514, 614) are restricted to an area adjacent to an ear piece (104, 504, 604) of the upper housing.

Abstract: A retractable antenna assembly provides a substantially matched antenna impedance to a matching circuit (712) of a radiotelephone (200) whether the retractable antenna assembly is in the extended position or the retracted position. In one embodiment parts (304, 312) of a capacitor (714) are integrally formed on an upper portion of the retractable antenna assembly (206) such that when in the retracted position the capacitor (714) contributes to the overall antenna impedance. In another embodiment a capacitor (1302) is integrally formed on the lower portion of the retractable antenna assembly (900).

Abstract: A resistor network bias circuit (24) and method is suitable for use in monolithic circuits. The method involves selecting resistors set a quiescent current for a two-stage power amplifier. The bias circuit (24) offsets the gate voltage for a first transistor (14) and a second N-channel depletion mode MESFET transistor (22) to maintain substantially constant drain current for the power amplifier over a range of threshold voltages. Selectable metal links (33-83) serially connected to resistors (30-80) provide parallel resistor combinations (36-86) for setting the quiescent currents of transistors (14 and 22).

Abstract: A wireless communication device (20) provides a matching state between a radio circuit (28) and an antenna assembly (26) in both its retracted and extended positions, and does so with an elegant design that increases reliability and manufacturability by reducing the number and complexity of components and moving mechanical parts. A matching circuit (30), which is reconfigured according to a switch (32) that is responsive to the antenna's position, provides the matching states.

Abstract: A wireless communication device (20) provides a matching state between a radio circuit (28) and an antenna assembly (26) in both its retracted and extended positions, and does so with an elegant design that increases reliability and manufacturability by reducing the number and complexity of components and moving mechanical parts. A matching circuit (30), which is reconfigured according to a switch (32) that is responsive to the antenna's position, provides the matching states. Furthermore, the switch (32) can be integrally formed as part of a feed terminal (36), the feed terminal (36) and a ground terminal (38) can hold the antenna in position, and the ground terminal (38) can hold a guiding tube (52).

Abstract: In order to dissolve powdered detergent prior to its being introduced into a clothes washer, the detergent is placed in a conical container which is slid into a body to a position beneath a water inlet nozzle. The container carries a filter which is pushed upwardly so that its upper edge bears against a top wall of the body.

Abstract: A clothes washing machine includes a water drain having a motor-actuated valve. The motor drives first and second rotatable members in a common first direction until the second rotatable member reaches a drain-opening position for actuating a drain-opening mechanism to open the drain valve. Simultaneously, an electric switch is operated to temporarily de-energize the motor in order to keep the valve open for a predetermined period. After the motor restarts (i.e., once the draining has been completed) the first and second motors are again rotated in the common first direction until a cam on the second rotatable member engages a fixed cam. The cam on the second rotatable member rides on the fixed cam to disengage the second movable member for rotation relative to the first rotatable member in a second direction to reclose the drain valve.

Abstract: A single-block ceramic filter (102) is coupled to two antennas (142 and 144) for providing both antenna duplexing and antenna-switched diversity in a duplex radio transceiver (100). One antenna (142) is coupled by the filter (102) to a transmitter (132), and both antennas (142 and 144) are switchably coupled by the filter (102) to a receiver (130) by diversity control circuitry (101) in response to a diversity control signal (137). A microcomputer (134) in the transceiver (100) is coupled to the receiver (130) for monitoring the received signal strength (135). When the received signal strength (135) drops in level indicating that the signal being received on one of the antennas (142 or 144) has become degraded due to fading or other interference, the microcomputer (134) changes the binary state of the diversity control signal (137) for switching the receiver (130) to the other one of the antennas (142 or 144 ).

Abstract: A dielectric block filter assembly which is surface-mounted upon a circuit board. The circuit board includes an opening formed to extend therethrough, and parallel-extending projecting members, formed of a portion of the printed circuit board, which extend into the opening formed to extend through the circuit board. The dielectric block filter includes a bottom mounting surface having notches corresponding to the projecting members. Each notch includes a seating surface for seating against corresponding ones of the projecting members in mated engagement therewith.

Abstract: A filter assembly (100) includes a ceramic block filter (102) and shielding bracket (132) which surface mounts to a printed circuit board (152) for interconnecting to radio frequency devices, such as a radio transceiver. The bracket (132) is soldered to the filter (102) and includes two openings (136 and 137) for exposing input/output electrodes (106 and 107) of the filter. The printed circuit board (152) includes an opening (162) shaped to accept the filter (102) and bracket (132) when inserted therein. Transmission lines (156 and 157) are disposed on tabs (158 and 159) and are reflow soldered to the corresponding electrodes (106 and 107) of the filter. The bracket (132) includes two tabs (134) which are reflow soldered to grounded portions of the circuitry on the top side of the printed circuit board (152).