Abstract: A light source for use in an infra-red data association data link device including a vertical cavity surface emitting laser for emitting a beam of light along a path, and a diverger positioned in the path for diverging the emitted beam of light.

Abstract: A high sensitive water entry alarm system which prevents outside noise from falsely triggering the alarm system. A transmitter generates ultrasonic timed acoustic bursts at a fixed frequency when it is submerged in water. A receiver located in the body of water senses for acoustic signals similar in characteristic to the transmitter signal. A comparing circuit coupled to the receiver compares the acoustic signals received by the receiver to a reference signal having the same fixed frequency as the transmitter signal. The comparing circuit also measures the duration of the acoustic signals received by the receiver. The comparing circuit will generate a alarm signal which will sound off an audible alarm only when the acoustic signal received by the receiver has the same fixed frequency and is transmitted in controlled burst at the same timed intervals as the transmitter signal.

Abstract: An initial frame synchronization method for finding out the initial frame synchronization offset at a receiver using the orthogonal frequency division multiplexing signals by which any data is given and received in a frame unit, and by the estimation method of the phase difference variation and the maximum likelihood in the frequency domain.

Abstract: A method of determining an object's position and associated apparatus provides positional information in a form that may be conveniently communicated to a computer to calculate the object's position. In a preferred embodiment, representatively incorporated in a computer keyboard, a method of determining an object's position includes forming an optical grid of reflected beacons and detecting an obstruction of the reflected beacons. The preferred embodiment apparatus utilizes a single light source and a single light sensor to detect an object's position in two dimensions.

Abstract: It is disclosed that a pager comprises: a receiving portion (1, 2) for receiving a radio wave paging signal and supplying a paging signal; an outputting portion (3, 6, 5) for outputting information when the paging signal is directed thereto; a power supplying portion (8, 9) for supplying a supply power; a detection portion (4) for detecting a voltage condition of the supply power; an operation portion (7) for generating a command signal in response to an operation; and an alarming portion (5, 6) for alarming when the operation portion generates the command signal after the detection of the low voltage condition. The pager may further comprise a timer (31) responsive to the detection portion. The alarming portion alarms in response to the timer if the operation portion does not generate the command signal within the predetermined time interval. The alarming portion generates an alarm sound or displays character data when the alarming portion alarms.

Abstract: The level of moisture in a buried splice case (14) is provided by a transmitter (26) that is energized from a power circuit (24) via a moisture detector (22) when the moisture detector detects a prescribed level of moisture in the splice case. Once erergized, the transmitter (26) transmits a coded word indicative of the prescribed moisture level for receipt by a receiver (30) located above ground. In this way, a technician, using the receiver (30) can directly determine the moisture level in the buried splice case without the necessity to excavate the case or to contact a member of the On-site Work Force at a communications facility.

Abstract: A portable traffic control comprising two display units, each responsive to a transmitter's radio signals, each display unit comprising a "stop" and a "go" lamp, the light from all lamps viewable by a person positioned between the display units. The system is optionally equipped with an audio warning means for detecting vehicles that ignore a display unit stop light, the display units each preferably employing a simplified circuit with a servo motor mechanism.

Abstract: The present invention is related to a shock endurable alarm lamp which is comprised of a light emitting structure and a shock proof structure. The light emitting structure is constructed from a plurality of lampshades and lamp base structures. A shock proof structure is installed on the bottom of the light emitting structure. The shock proof structure has two layers of spring structures installed on the upper and lower sides of a fixing base, and then a bolt is inserted downwards into the two layer structures for aligning the springs. Finally, a bushing covers the outside of the structure. Therefore, a shock proof structure is formed. Next, the whole structure is installed on a machine which needs an alarm lamp. The shock proof structure formed by the two sets of springs will cause oscillations induced from the machine to be absorbed, thereby sustaining the structure and stability of the alarm lamp.

Abstract: A scalable bandwidth switch is formed from a smart data crossbar and a plurality of simple data crossbars in parallel. A data block that is inputted into the switch contains a header portion and a payload portion. The data block is multiplexed so that the entire header portion is inputted to a port in the smart data crossbar. The smart data crossbar determines the destination of the data block from the header portion, and transmits this information on a control line. The payload portion is inputted to the port in the smart data crossbar, and ports in the plurality of simple crossbars depending on the bandwidth desired. The control line is coupled to the simple data crossbars and configures the simple data crossbars using the port destination information generated by the smart data crossbar.

Abstract: A flexible resilient ribbon having first and second conductive surfaces is wrapped over the top edge of a pocket wall forming a bowed-out first conductive surface adjacent to the top edge of the wall which biases the first conductive surface into contact with the second conductive surface when a card is absent from the pocket, an alarm circuit IC terminal is connected by a network which includes a fixed resistor to power supply negative and the first and second conductive surfaces each of carbon, in series removable contact, connected to power supply positive.

Abstract: The alarm circuit uses speed detection so that at a fan slowdown speed below a critical low level, a buzzer alarm starts sounding at a low warning volume and then as the fan slows down further the volume increases; that is, the buzzer volume or the buzzing frequency is inversely proportional to the fan speed. The circuit advantageously can be used for a wide range of fans. A pulse detector of a first stage comparator of this circuit detects the pulses or speed of the fan. More particularly, a power supply isolation resistor with an AC coupling capacitor block the DC voltage levels at the fan so that only the AC or pulse component of the fan is picked up. The isolation resistor prevents the power source from attenuating the pulses. The second stage comparator of the circuit sets the fan speed at which the alarm is to start buzzing and powers the buzzer accordingly. Particularly, the pulses are amplified by the first stage comparator and they periodically discharge a charging capacitor.

Abstract: The present invention is a method and apparatus for controlling power supply to aircraft electronic systems based on ambient environmental conditions. The apparatus comprises a monitor for detecting an environmental condition, a power supply for providing power, a circuit which receives power from the power supply, and a switch coupled to the monitor. Upon detection of the environmental condition, the switch connects the power supply to the circuit, otherwise the switch disconnects the circuit from the power supply.

Abstract: A circuit breaker with trip indicator assembly for indicating the trip status of the circuit breaker. The trip indicator assembly includes a spring powered shaft movable between a cocked position and a trip position in which the spring powered shaft protrudes through the housing of the circuit breaker to indicate the trip status. The shaft is operatively connected to a trip actuating mechanism of the circuit breaker so as to actuate the shaft in response to the trip actuating mechanism actuating an operating mechanism of the circuit breaker. A lost motion coupling is provided to assure that the trip indicator assembly is not actuated until after actuation of the operating mechanism. A bell alarm switch assembly for signalling the trip status of the circuit breaker may be operatively connected to the trip indicator assembly.

Abstract: An operator designates an image of equipment or a device using a pointing device and touch coordinate detector which detects touch coordinates of the designated equipment or device on a graphic screen. A specifier compares the display coordinates on the image of each equipment or device sent from a display coordinate detector to the touch coordinates on the graphic screen output from the touch coordinate detector and outputs data specifying the equipment or device touched by the operator to a camera switching section. The camera switching section switches from a plant equipment and device monitor camera to an operating board monitor camera. The image of the operating board is displayed in a window in a predetermined area on the graphic screen. A CRT display controller causes an operating window to be displayed for the specified equipment or device displayed in a window on the CRT display unit.

Abstract: A chip detector assembly includes a body member with a cylindrical passage for receipt of a chip detector. The chip detector includes a triangular flange which cooperates with a congruent triangular window in the housing to permit the chip detector to engage and lock to the housing in any one of three equally spaced, distinct positions.

Abstract: The boom length measurement includes a transmitting unit mounted on the fly section of a multi-section telescopic boom, and a receiving unit mounted on the base section of the multi-section telescopic boom. The transmitting unit transmits a first and second signal having first and second transmission speeds, respectively. The second transmission speed is less than the first transmission speed. Based on a difference in transit times of the first and second signals received by the receiving unit, a length determiner determines the length of the multi-section telescopic boom. A display displays the determined length.

Abstract: In an overhead power line switch, critical switch adjustment dimensions, switch position, switch status and other switch parameters are sensed by a plurality of particularly placed sensors, allowing determination as to whether the switch has operated correctly at critical points of the switch. The sensors also provide critical maintenance indication as to the operational status of the switch. In a preferred arrangement, the sensors are positioned to sense at least one of whether the contact blade is in a toggled closed position or a switch-open position, whether the contact blade is aligned with the clip assembly, the contact blade depth in the clip assembly, etc. The monitoring system is preferably provided with a remote terminal unit delivering sensor data to a remote operating facility.

Abstract: An improved remote control vehicle security system performing an override re-arm function enables a disarmed security system in which siren alarming, parking light flashing and other sensor trigger system and etc. are stopped to function for a preset period of time, such as 30 seconds, if no further input to cancel the override re-arm is given within the preset period of time, the system will resume an armed state automatically.

Abstract: An apparatus (10) for sensing weight of an occupant on a vehicle seat (36) in an occupant restraint system (10) includes variable inductance sensor (50) mounted in the seat (36) so that inductance of the sensor (50) is functionally related to the occupant's weight on the seat (36). A capacitor (98) is connected in parallel across the variable inductance sensor (50). The capacitor (98) and the variable inductance sensor (50) form a tank circuit (100). An oscillator (40) is operatively coupled to the tank circuit (100) for driving the tank circuit (100) into oscillation. A phase detector (94) monitors a phase shift between an output of said oscillator and oscillation of tank circuit. Weight on the seat is functionally related to the monitored phase shift.

Abstract: A function display controlling method and apparatus for a composite apparatus of a compact disc graphics (CDG) player and of a video cassette recorder (VCR) for displaying on a single fluorescent display panel. The control functions are divided into three groups of the CDG player exclusive function, an exclusive function of the VCR and a function common to both the CDG player and the VCR. The functions selected or currently being executed in the composite apparatus of the CDG player and the VCR are recognized by a controller, and because the CDG player exclusive function, the exclusive function of VCR and the function common to both the CDG player and the VCR, which are stored in a function control input section, are read out in accordance with the operation size, the current operation state is displayed on a fluorescent display panel. Therefore, the fluorescent display panels in the composite apparatus of the CDG player and the VCR are simplified, and the operative functions are clearly displayed.