Abstract: An emergency position indicating radio beacon, sized for mounting on a life vest or the like, that includes a water-activated switch that automatically activates the transmitter when the water-activated switch is mounted in water. The water-activated switching circuitry includes an insulated electrical paddle that separates the exposed electrical contacts a predetermined distance to insure that the device will not be inadvertently activated by moisture, but that it must be immersed in water for proper contact. The system also includes a memory circuit and power amplification.

Abstract: Disclosed is a multiprocessor system made up of several processing nodes linked by a time division multiplexed (TDM) bus to form a synchronous system. According to one embodiment, each processing node includes a digital signal processing (DSP) element, a dual port memory element and a memory control element in an integrated structure. Each memory element is segmented into four quarters. The first two are for read operations by the DSP element and write operations by the bus. However, the DSP element and the bus can only access any given segment during opposite phases of a frame clock signal. Additionally, each node is assigned an exclusive identification code whereby each node can post data to a memory element of another node.According to another embodiment, the various elements of each node are combined in various integrated structures.

Abstract: A method for fabricating a semiconductor laser diode includes the steps of forming a double hetero structured semiconductor layer on a substrate, forming a dielectric layer on the double hetero structured semiconductor layer, selectively etching the dielectric layer to expose a portion of the double hetero structured semiconductor layer, selectively removing the exposed semiconductor layer using the dielectric layer as a mask by liquid phase etching, and re growing a semiconductor layer on the etched portion by liquid phase epitaxy.

Abstract: A satellite receiver includes a signal acquisition unit that is operative to receive a validation signal from a station controller located at a paging station. The satellite receiver is operative to lock onto a satellite signal. When the satellite receiver locks onto a satellite signal, the satellite receiver demodulates the satellite signal into a digital data stream that is forwarded to the station controller for packaging and retransmission as a page. The station controller includes circuitry to determine if the digital data stream is correct and intended for the station controller. If the digital data stream is correct, the station controller generates a validation signal and forwards the validation signal to the signal acquisition unit of the satellite receiver. If the digital data stream is incorrect, the station controller will forward a negative validation signal to the signal acquisition unit.

Abstract: An improved suction noise muffler mounting apparatus for a hermetic compressor which is capable of more simply mounting a suction noise muffler to a cylinder head, for thus reducing the number of fabrication processes and increasing the productivity of a hermetic compressor, which includes a suction noise muffler head having a protrusion having a predetermined height and formed on the upper surface thereof and integrally engaged to an upper end of the suction noise muffler, and a fixing member provided for mounting the suction noise muffler to a portion of the cylinder head.

Abstract: A BGA (ball grid array) semiconductor package with a ring-type heat sink is disclosed. In the above package, the heat dissipating area is enlarged by extending the edge of a chip mounting die paddle formed of a copper or copper alloy layer to the outside of the package. The ring-type heat sink is attached to the extended portion of the die paddle such that the heat sink surrounds the encapsulant of the package. The above BGA package thus directly and effectively dissipates the chip's heat through the heat sink with high thermal conductivity. A plurality of plated through holes may be formed on the chip mounting portion of the PCB of the above package. The BGA package with both the ring-type heat sink and the PTHs, the heat dissipating effect of the package is further improved.

Abstract: A method and apparatus for trimming or replacing a message that has been received and stored in a solid-state memory of a wireless voice messaging unit includes playing back and marking a selected portion representing the important information in a stored message and then replacing the entire message with the selected portion, thereby increasing the available memory space for new messages. In addition, after listening to the received and stored message the user can create his own abstract of the message that is shorter than the original. The new shorter message then replaces the original message, thereby increasing the available memory space for subsequent messages.

Abstract: A heat exchanger is disclosed including a plurality of plate fins which are disposed in parallel at a predetermined interval and between which air flows; heat transfer tubes through which fluid runs; and a plurality of strips formed on the fins between nearby heat transfer tubes, the strips being divided into first strips formed on a center line connecting the centers of the nearby heat transfer tubes, and second strips opposingly disposed centering on the center line and formed along an ellipse having the center line in the direction of the line of apsides.

Abstract: An improved cooling air circulating structure for a refrigerator which is capable of enabling a smooth flowing of a cooled air by providing a vertically arranged duct unit in a refrigerating compartment thereof and integrally forming a cooled air returning path with the duct unit, which includes a shroud disposed between the evaporator chamber and the grill panel for distributing cooling air generated in the evaporating chamber into the freezing compartment and the refrigerating compartment, respectively, and a duct unit disposed in the refrigerating compartment, comprising an upper freshening section duct portion disposed at an upper rear portion of the refrigerating compartment for providing cooling air into a freshening section of the refrigerating compartment and for returning an air circulated in the upper freshening section portion to the evaporator chamber through an air flow path, and a lower refrigerating section duct portion of which an upper end is integrally connected with a bottom portion of the

Abstract: A shield (50) for use in wave soldering processes to selectively affix solder to an area of circuit board (20), having one or more electronic components (21) on the solder side of the board, is disclosed. Shield (50) includes a generally planar base member (51) of low thermal conductivity which forms the foundation of shield (50). Marginally disposed registration ridges (54) are formed on the upper surface (52). Registration ridges (54) serve to hold circuit board (20) against shield (50) in a fixed position. Ridges (54) are positioned to closely receive the peripheral edges of circuit board (20). One or more solder flow openings (56) are formed through base member (51) extending from upper side (52) to lower side (53). Solder flow openings (56) are positioned to align with the selected areas of circuit board (20) to which solder is to be affixed. One or more recesses (55) are provided in the upper surface (52) of base member (51) to receive and shield electronic components (21).

Abstract: Multi-biosensor in which only one enzyme is used for handy and simultaneous measurement of GPT and GOT activities, and a method for fabricating the multi-biosensor, are disclosed, the biosensor including an insulating substrate; a reference electrode formed on the insulating substrate; first and second working electrodes formed on one side of the insulating substrate having the reference electrode formed thereon; third and fourth working electrodes formed on the other side of the insulating substrate having the reference electrode formed thereon opposite to the first and second working electrodes centered on the reference electrode; first, second, third and fourth carbon paste layers formed on the first, second, third and fourth working electrodes respectively; first and second enzyme/polymer carbon paste layers formed on the first and second carbon paste layers respectively; first and second non-enzyme/polymer carbon paste layers formed on the third and fourth carbon paste layers respectively; an amino acid/

Abstract: A door for preventing leakage of electromagnetic wave of a microwave oven includes: a front panel forming a front surface of a door; a first contact surface expanded from the circumference of the front panel and recessed forward a cavity of the microwave oven so as to contact an entrance of the cavity; a door frame portion expanded from the circumference of the first contact surface and proceeding to the front surface of the door so as to form a frame of the door; a second contact surface expanded from the circumference of the door frame portion and recessed toward the cavity so as to contact a frame of the cavity entrance; a choke cavity formed between the door frame and the second contact surface; and a slit formed on the circumference of the door frame in a predetermined interval and expanded into the choke cavity in a predetermined length. Thus, leakage of the electromagnetic wave can be prevented due to the slit shape of a predetermined period.

Abstract: A dynamic focus circuit for a cathode ray tube having a curved screen that corrects clearness difference between the central part and the corners of a screen caused by relative distance difference from an electron gun to the screen. This circuit corrects picture deterioration due to the focal length difference, using dynamic voltages included in vertical and horizontal parabolic wave signals.

Abstract: A method of controlling the drying operation of a washing machine which comprising proceeding with an initial drying operation by applying a power voltage to a motor for a predetermined period of time according to the volume of laundry being treated; proceeding with an interim drying operation by applying a power voltage to the motor at a predetermined phase angle according to the volume of the laundry; and following with a main drying operation by applying a power voltage to the motor for a predetermined period of time.

Abstract: In an automatic cooking controlling apparatus and method for a cooker, the apparatus includes a turntable installed within a chamber of the cooker for placing a to-be-cooked object thereon, an infrared filter for filtering only the infrared wavelength bands reflected from the to-be-cooked object, an infrared adjusting lens means for adjusting the wavelength filtered by the infrared filter, a magnetron for heating the to-be-cooked object, a driving motor for rotating the turntable, a thermopile sensor for detecting an infrared signal generated from the to-be-cooked object, a signal processor for processing the signal detected from the infrared sensor, and a controller for controlling the oscillation mode of the magnetron.

Abstract: In a vertical sawtooth generator, an end time of a retrace portion of a vertical sawtooth signal is controlled by an output signal of a comparator. The comparator has a first input terminal that is responsive to a reference voltage and a second input terminal that is responsive to the sawtooth signal. The reference voltage is coupled to an input terminal of an amplifier of an integrator that generates the sawtooth signal. Any disturbance signal component in the reference voltage is super-imposed on the sawtooth signal. Because the same disturbance signal component is developed simultaneously in both input terminals of the comparator, a high degree of common mode rejection is provided with respect to the disturbance signal component.

Abstract: An insulating member has two (2) spring arms each normally biased to a first position and each pivotable to a second position. A pin in a housing at one end of the spring arms provides the spring arm pivot fulcrum. Resilient electrical conductors extend through apertures in the other ends of the spring arms. Looped portions in the conductors at positions beyond the apertures resiliently engage, respectively, probes and shield casings in a pair of electrical connectors when the spring arms are biased to the first positions. Additional looped portions in the conductors at positions between the apertures may be fixedly positioned relative to the housing by an insulating pin extending into the housing to the approximate center of such additional looped portions. The probes and shield casings are included in coaxial connectors disposed within the housing. The connectors include insulators between the probes and the shield casings. The connectors are coaxial with a pair of barrels disposed within the housing.

Abstract: An external memory control circuit for a sound field processing digital signal processor capable of obtaining continuous sound listening by shortening the time that sound is cut off upon a change of the sound field algorithm depending on the listening place (i.e., concert hall, meeting hall, church or the like). The external memory control circuit is constructed to utilize a mute function only for the time required to transfer the algorithm itself where a sound field processing circuit is realized using a DSP, thereby reducing the time that sound is cut off and thereby obtaining continuous sound listening even when the sound field algorithm is changed while listening.

Abstract: An improved monaural signal judgement circuit which is capable of judging whether or not an input signal is monaural when signals from a television, a video cassette tape recorder, an audio cassette tape recorder, a compact disc player, or the like are inputted to the monaural signal judgement circuit and of converting the process into a pseudo stereo function when the input signal is monaural, which includes a wave form shaping circuit for separately wave-form-shaping a left-side signal and a right-side signal inputted thereto; an operation circuit for computing a signal level difference of the wave-form-shaped right-side and left-side signals; a control signal setting circuit for setting a control signal in accordance with an output of the operation circuit; an input control circuit connected between an input side of the operation circuit and an output side of the control signal setting circuit for adjusting a signal level at an input side of the operation circuit in accordance with a control signal applied

Abstract: An MPEG video CODEC includes a variable length decoder to a video coder with respect to an MPEG-2 profile. The MPEG video CODEC further includes a controller which controls both a signal sequence and a signal input/output function when a function of the MPEG video CODEC is converted to a decoding-mode and a coding-mode. Accordingly, the MPEG video coder and MPEG video decoder can be embodied as a single system. The MPEG video CODEC comprises a coding/decoding mode generator for detecting whether a mode signal inputted from an input terminal is a coding-mode, or a decoding-mode, and generating a corresponding mode control signal; a coder/decoder selector for selectively converting a routine of a coded bit stream, according to a corresponding mode control signal from the coding/decoding mode generator; and a coder/decoder for selectively coding or decoding a bit stream selected by the coder/decoder selector, and then transmitting the bit stream to a storage element, or to a displayer.