Abstract: A wireless circuit setup is used in a hazardous area where the circuit is intrinsically safe and does not require explosion proof containment. In this setup, an intrinsically safe master barrier (420) is used without the use of a resistor and one or more resistors (R1, R2, R3) are placed in at least one final barrier at the output end prior to the signal exiting the system. The use of resistors (R1, R2, R3) at the final barrier reduces the loss of power and speed. Optionally, in this setup, the antenna can be located remotely from the remaining components of the wireless transceiver. The antenna can also be connected the optional device using the same cable that shows the communication status information, such as transmit/receive status, signal strength, power, etc, in hazardous area.

Abstract: A circuit for detecting noise events in a system with time variable operating points is provided. A first voltage, which is averaged over time, is compared to a second voltage. A signal is generated to instruct circuits within a processor to initiate actions to keep a voltage from drooping further.

Abstract: A light-emitting diode lighting circuit is provided. The light-emitting diode lighting circuit includes: a plurality of light-emitting diodes connected in series, and a protective element connected in parallel to each of the plurality of light-emitting diodes, in which in the case where an open-circuit failure is caused in the light-emitting diode, dielectric breakdown occurs in the protective element connected in parallel to the light-emitting diode.

Abstract: A protection device applicable to an electronic device is disclosed. The electronic device includes an operating unit which outputs an on/off signal when a user turns on/off the electronic device is disclosed. The protection device includes a setting unit for setting a predetermined period, and a processing unit electrically connected to the operating unit and the setting unit. The processing unit outputs a trigger signal to turn on/off the electronic device when receiving an on/off signal provided by the operating unit during the predetermined period, and no longer outputs any trigger signal when receiving the on/off signal again during the predetermined period.

Abstract: An object of the invention is to provide a break detection method capable of lessening a delay of motor power line break detection. According to the invention, in a motor power line break detection method of an AC servo driver including a current detector and a torque controller, a torque current component 9 is extracted from a three-phase AC detected by current detector 4, 5, a comparison is made between a torque command 1 and the torque current component 9, and if the difference between the torque command and the torque current component exceeds a setup value 21, it is recognized that a motor power line is broken.

Abstract: A method and a device for shutting down a drive during a power outage are disclosed. The method and device include a matrix converter, several commutation capacitors on the power line side, a switch unit on the power line side and a resistor unit. During a power outage, the matrix converter is immediately disconnected from the power supply, and the resistor unit is connected to the input terminals of the matrix converter in such a way that the amplitude of a voltage applied to the resistor unit equals the amplitude of an actual capacitor voltage space vector, and the speed setpoint is set to zero. This enables a drive with a matrix converter to be shut down during a power outage by way of a pulsed resistor.

Abstract: The invention relates to a flame retardant, comprising (A) a triazine-phenolic resin, (B) a nitrogen-containing compound, and (C) at least one metal compound, wherein said triazine-phenolic resin has formula (I): wherein, m and n are independently an integer ranging from 1 to 10 and R is OH, NH2, COOH, SO3H, C(O)H, or CH3CONH. The invention further relates to flame-retardant resin composition containing the above flame retardant and its use.

Abstract: A motor drive circuit comprises a first power line; a second power line; an H-bridge circuit that includes a first source transistor and a first sink transistor connected serially, a second source transistor and a second sink transistor connected serially, a motor coil connected at a connection point between the first source transistor and the first sink transistor, and first to fourth regenerative diodes disposed respectively on the first and second source transistors and the first and second sink transistors, the H-bridge circuit being connected between the first power line and the ground, the first source transistor and the second sink transistor being switched complementarily to the second source transistor and the first sink transistor; and a voltage constraint circuit connected between the second power line and control electrodes of the first and second source transistors, the voltage constraint circuit constraining increase in the voltage of the control electrodes of the first and second source transis

Abstract: A protection device for an oscillating power circuit, namely for a demining coil, such device incorporating circuit breaking means positioned between an alternating current supply network and the power circuit, such device wherein it comprises at least one means to measure and analyze the current supplying the power circuit, means able to detect the appearance of a direct current and connected to triggering means ensuring the opening of the circuit breaking means when the alternating current ceases.

Abstract: Portable electronic devices are provided. A portable electronic device includes a case and a rotary member. The case includes an opening and a connection portion adjacent to the opening for attachment of a strap. The rotary member is pivotally connected to the case between a first position and a second position. The opening is blocked by the rotary member when in the first position. The rotary member separates from the opening when in the second position, such that the opening is exposed on a side of the case.

Abstract: There is provided a plasma discharged static eliminator comprises a power supply, electrodes and a plasma discharging electrode portion comprised of a dielectric covering the electrodes. The plasma generated by a dielectric-barrier discharge in which the dielectric functions as a barrier is used as a charged molecules source or an electrons source.

Abstract: A system for providing real-time modeling of protective device in an electrical system under management is disclosed. The system includes a data acquisition component, a virtual system modeling engine, and an analytics engine. The data acquisition component is communicatively connected to a sensor configured to provide real-time measurements of data output from protective devices within the system under management. The virtual system modeling engine is configured to update a virtual mode of the system based on the status of the protective devices and to generate predicted data for the system using the updated virtual model. The analytics engine is communicatively connected to the data acquisition system and the virtual system modeling engine and is configured to monitor and analyze a difference between the real-time data output and the predicted data output. The analytics engine is also configured to determine the bracing capabilities for the protective devices.

Abstract: The switching apparatus and method are provided for varying the impedance of a phase line of a segment of an electrical power line. The phase line includes n conductors electrically insulated from each other and short-circuited among each other at two ends of the segment. The apparatus comprises, for each of at least one of the n conductors, a passive component and a pair of electromechanical and electronic switches, the pair of switches being able to connect and disconnect in a selective manner the passive component in series with the corresponding conductor, the switches of each pair being controllable independently. The apparatus also comprises a detecting device for detecting the current operating conditions of the phase line, and a control device for controlling each pair of switches according to the current operating conditions.

Abstract: An input voltage contacted at the input of a contact can be through-connected to an output of the contact or switched off via a movable contactor. In order to determine the switching state of the contact, any drop in the contact voltage between the input and the output is detected. By the detected contact voltage, it can at least be determined whether the input voltage has been through-connected to the output or switched off.

Abstract: According to the breaking detection processing, it is determined that (A) iu of AC current (absolute value) supplied to a motor is less than 0.5 amperes or iv thereof is less 0.5 amperes or iw thereof is less than 0.5 amperes, (B) the angular velocity of the motor is 1 rad/s or more and (C) at least any one of the current instruction values id*, iq* is 5 amperes or more in a step and then, a period in which all these three conditions (A)–(C) are satisfied at the same time is determined in another step. Consequently, it is determined that any one of the power supply lines in the motor is broken and a breaking detection flag is set to ON so as to detect the breaking.

Abstract: A method is disclosed of generating a predetermined field of cavitation around a remote target in an underwater environment. The method includes the steps of identifying a remote target location, generating at least two acoustic beams, each at a high power output, from an underwater acoustic source, and controlling the generated acoustic beams to intersect with each other at the remote target location and thereby create a destructive cavitation field at the intersection of the beams. The acoustic source and target can be located in unconfined underwater space and at a distance of at least 100 m apart.

Abstract: A power supply assembly for a lighting system is directly mountable onto a standard electrical junction box. The power supply circuit provides an electronically power limited output through multi-conductor power connectors. The power supply assembly is used as part of a lighting system. The power supply output is used to connect to luminaires using a multi-conductor cable having multi-conductor power connectors which mate with the multi-conductor power connectors on the power supply and luminaire. The luminaires use a circuit to interface between the power supply output and the lamp.

Abstract: An electric motor circuit utilized, for instance, for adjusting a wing mirror of a vehicle is provided with a motor with a driving circuit. The driving circuit includes a relay switch element included in series with the motor and a protecting circuit for bringing the relay switch element into a non-conductive position at overload of the motor. The protective circuit is provided with an exciting coil and a deenergizing coil. The exciting coil serves for bringing the relay switch element into a conductive position. The exciting coil is included parallel to the motor in series with the relay switch element. The deenergizing coil is included in series with the motor for bringing the relay switch element in a non-conductive position when a current through the deenergizing coil and the motor exceeds a threshold value. Motor and motor protection are preferably included together in the housing of a mirror construction.

Abstract: A technique is provided for determining service intervals for devices, such as medical equipment. Data related to a device is collected and compared to data from a population of like devices. A service interval may be calculated based on the comparison. The data regarding the population of like devices may be raw quantitative or qualitative data or may be processed data, such as may be used to graph the reliability of the device as a function of some variable such as usage or age, i.e. a reliability curve. The data may representative of the device as a whole or one or more components of the device. Multiple service intervals may be generated for a single device by calculating a service interval for each data source, such as a component or subset of components, of the device. An optimal service interval may then be selected. In addition, the technique may be applied for selection of a service interval for more than one device.

Abstract: A method for installation of a programmable protective function in a protective device for an electrical power distribution network, with the protective device having means for processing measured values from measurement appliances for the power distribution network, and having means for initiating switching commands by primary appliances for the power distribution network, and the protective function determining the switching commands on the basis of the measured values, when it is carried out, has the following steps: transmission of a description of the protective function from a remote function server via a communication link to the protective device, loading of the description in the protective device, and implementation of the loaded description of the protective function.

Abstract: A configurable control system for operating an industrial system in a reliable, safety-enhanced manner, and method of implementing such a system in any of a variety of particular industrial systems of a given class, are disclosed. The method includes storing, onto a controller of a particular industrial system, a master program capable of being used to operate a generalized industrial system having a maximum number of safety subsystems of a given type, where the particular industrial system falls within a class defined by the generalized system.

Abstract: A low-cost, high-speed, bus-based communication system is provided that includes a master electronics card, a number of slave electronics cards, and a backplane that interconnects the master and the slave electronics cards via a serial bus, a parallel bus and some common signals for clocking and synchronization.

Abstract: A protection circuit (1) is coupled to a processor (2) and a memory device (3) which preferably form a physical unit, and prevents unauthorized access to the memory device (3) by combining internal and/or external signals (s2, s3, s4; s1) in a logic device (5) for detecting the unauthorized access. These signals are control signals of the processor-memory system and correspond to the status of the latter. In the event of an unauthorized memory access, the logic device (5) disables an externally accessible data interface (6) and/or inhibits the control signals (s5) necessary for access to the memory device (3).

Abstract: An apparatus for the improvement of AC waveform comprising means for applying a demand input waveform at an input of a circuit for power conditioning (including an inverter PWMVC or BBHCC) that is operable to provide an output waveform at an output; a feedback loop between the input and output, the feedback loop including means for sampling the output waveform (ADC1), means for subtracting a required waveform (RW) from the output waveform to produce an error waveform, means for processing the error waveform in a pre-defined manner to produce a processed error waveform (Clip1, Disc1, Att1), means for adding or subtracting the processed error waveform from Th. demand waveform to produce a revised demand waveform, and means for applying the revised demand waveform to the input of the power conditioning circuit at a subsequent time as an input demand waveform to produce a new AC output waveform at the output.

Abstract: A signal acquisition instrument, such as an oscilloscope, having an input stage that is referenced to a user's ground is disclosed. Information gathered by the input stage is stored in a storage element powered by a floating power supply that is referenced to the user's ground. After storage, the storage element is disconnected from the floating power and from the user's ground and switched to a power supply referenced to the remainder of the system. FET switching is beneficial, and information can be stored either in an analog format or in a digital format.

Abstract: An apparatus for defeating an interlock for an electrical cabinet permits a technician qualified to service the equipment within the cabinet to defeat the interlock and open the cabinet while current is flowing through the equipment therein, while permitting the interlock to continue to resist unauthorized access to the interior of the cabinet.

Abstract: A semiconductor integrated circuit device has a semiconductor integrated circuit chip, a package enclosing the chip, and a plurality of conductors connecting the bonding pads of the chip to the leads of the package. The chip has an internal circuit, a plurality of bonding pads having signal paths formed between themselves and the internal circuit, and a switching circuit provided in a predetermined signal path so as to perform a switching operation to allow the internal circuit to be connected selectively to one of different bonding pads. The switching circuit is fed with an external signal to perform its switching operation in such a way as to prevent the signals passing through mutually adjacent conductors from affecting each other.

Abstract: A power monitoring apparatus monitors the voltage fluctuation range of an AC power supply and the duration of voltage fluctuations within the voltage fluctuation range. The power monitoring apparatus looks up a power failure rank table for determining the power failure rank of the power supply on the basis of the voltage fluctuation range and the duration obtained as the monitoring result to determine the power failure rank of the power supply. The power monitoring apparatus sends a power failure signal indicating the power failure rank to a power supply destination of an AC power supply.

Abstract: In a power supply protection circuit, a FET and a diode are connected to a power line so as to protect an inner circuit from an excessive voltage caused by a device connected to an IEEE1394 bus. A switching circuit connected to the power line turns off the FET when the voltage of a port exceeds a reference voltage, which is lower than the withstand voltage of the inner circuit.

Abstract: In the process of drilling a concrete in a building, many times contact and damage can accidentally be made with existing electrical conduit and the wires inside, or plumbing pipes. This damage can be avoided with a device which can indicate a grounded metal, such as a conduit, plumbing pipes, supporting frames or metal beam, all of which may be grounded to the existing electrical system. A safety protection circuit is incorporated into a power tool and includes at least one LED indicator connected to a low voltage power supply and to the body of the power tool to be illuminated when contact with grounded metal occurs.

Abstract: When a control section (39) turns on a switch (31, 33, 35), a capacitor (37) is onnected to a secondary battery (B1) in parallel. Accordingly, voltage between both nds of each capacitor (37, 38) reaches voltage between both polarities of each secondary battery (B1, B2). Thereafter, when the control section (39) turns off the switch (31, 33, 35) and turns on a switch (32, 34, 36), each capacitor (37, 38) is connected to the secondary battery (B2, B3) in parallel. The capacitor (37, 38) is charged/discharged to balance voltage between both polarities of the secondary battery (B1 to B3).

Abstract: A protective arrangement in a device that protects the device and personnel or users of the device when undesirable conditions develop within the device. The protective arrangement de-couples a power source from the device, prevents access to the device that may harm a user or aggravate the undesirable condition, and actuate an alarm when the undesirable condition occurs.

Abstract: A basic module 2 has operation program storing part for prescribing the relation between the state of a safety input signal to be fetched from external input terminal sections 32, 33 and the state of a safety output signal to be transmitted to external output terminal sections 41, 42 for each type of predetermined safety switches, type-of-switch setting part for setting external input terminal sections 31, 32 and the type of safety switches to be connected to the external input terminal sections, and operation program executing part for selecting a safety operation program corresponding to the type of the switch set by the setting part among a plurality of types of safety operation programs stored in the operation program storing part and executing the selected program for the external input terminal sections 31, 32 set by the setting part.

Abstract: A GFCI device which has reverse wiring protection is provided where no power is present at the face terminals even when the device is reverse wired. The device has a pair of movable bridges connected to its terminals. The terminal bridge pair makes contact with the load and face terminals providing power to these terminals when the device is reset. The device also has a reset lockout feature that prevents it from being reset after having been tripped if the circuit interrupting portion of the device is non-operational.

Abstract: The ionizer of the present invention comprises a chamber which has an ionization part that ionizes a portion of an ion carrier gas that is supplied to the interior of this chamber, and a blowing part which feeds the ion carrier gas toward a charged body. The ionization part is constructed from an ionization source which is contained in the chamber, and a control device which is connected with this ionization source via a high-voltage cable. Either the generating part of a soft X-ray generating device, the generating part of a low-energy electron beam generating device or the generating part of an ultraviolet radiation generating device is used as the ionization source. The control device, the connecting part between the control device and the high-voltage cable and the connecting part between the ionization source and the high-voltage cable are formed with an explosion-proof structure.

Abstract: A method and apparatus for improving the co-planarity between conductive structures exposed in an interface connector for a portable electronic device. The interface connector includes an elongate housing having a front surface and a bottom surface. The front surface is configured to be at least partially exposed at a peripheral portion of the portable electronic device. The front surface defines port openings in the elongate housing and the bottom surface defines plate openings therein. The plate openings are configured to receive and retain conductive structures and are configured to be at least partially exposed at the bottom surface of the elongate housing and at least partially exposed at the port openings to provide electrical interconnection to the portable electronic device. With this arrangement, the conductive structures in the interface connector are substantially co-planar with each other to provide improved and more reliable electrical interconnection with the portable electronic device.

Abstract: An electronic device of an embodiment of the invention is disclosed that includes a housing and an electronic mechanism. The housing has one or more cavities for removably storing speakers, which are intended for non-use when stored in the cavities. The electronic mechanism is fixably situated within the housing.

Abstract: An opto-mechanical interface apparatus includes an optical hybrid, an electronic hybrid adapted to receive electronic components, an adapter fixture for fixing the electronic hybrid and the optical hybrid to one another to form a combined hybrid, a lower-capsule part, and an upper-capsule part adapted to mate with the lower-capsule part. Mating of the upper-capsule part and the lower-capsule part encloses at least part of the combined hybrid. The apparatus forms an opto-mechanical interface for making external optical connection(s).

Abstract: There is provided a method and a basepan assembly for a panel board. The basepan assembly comprises a basepan having a bottom portion and at least one sidewall. A first bus bar is mounted in the bottom portion of the basepan. A second bus bar is mounted to its side proximate the side wall of the basepan. The side wall can include fasteners to couple the second bus bar to the side wall.

Abstract: The operating voltage of an integrated circuit (e.g., a processor) is changed in response to one or more conditions (e.g., a laptop computer is connected to an AC power source). Both the operating frequency and the operating voltage of the integrated circuit are changed. The voltage regulator providing the operating voltage to the integrated circuit is caused to transition between voltage levels using one or more intermediate steps. The integrated circuit continues to operate in the normal manner both at the new voltage and throughout the voltage transition.

Abstract: An LED display assembly, comprising a grid of electrical conductors; light emitting diodes in association with the grid and in electrical communication with the conductors that provide power for LED operation, the grid operable to receive heat from the diodes during diode operation, and the array configured for passing coolant fluid for transfer of heat to the fluid. LED packages adjustable relative to a mounting grid, are also provided.

Abstract: A land grid array socket comprises an insulative housing having a plurality of contacts. The insulative housing has a top surface for receiving a land grid array package. A cover member is pivotally mounted on a first end of the insulative housing. The cover member is pivotal between an open position and a closed position where the cover member presses the land grid array package toward the top surface of the insulative housing so that the land grid array package electrically connects to the contacts. A lever is pivotally mounted on a second end of the insulative housing. The lever has a locking portion for locking the cover member in the closed position. A metallic reinforcing plate is positioned on a bottom surface of the housing. The metallic reinforcing plate extends between the first end and the second end of the insulative housing.

Abstract: Methods and apparatus for detecting obstructions in the path of a movable barrier are disclosed. Embodiments are included which advantageously combine edge sensing contact detectors and non-contact detectors such as photo eye detectors. Relay logic is also described for controlling the response of a movable barrier operator to input signals including input signals from contact type and non-contact obstruction detectors.

Abstract: A frequency regulator protection circuit for controlling acceleration of electric vehicle comprises a power unit, a display unit, a protection unit, a control unit, a sensor unit, a data processor unit, a trigger unit, a regulator unit, and an output unit. The control unit receives a rotation speed signal from a motor. The sensor unit detects whether there is a current overload and delivers a corresponding overload signal to the data processor unit that consequently outputs a frequency change signal to the trigger unit which, in turn, delivers a first regulation signal to the regulator unit. The output unit further delivers a second regulation signal to the regulator unit, corresponding to different situations of insufficiency of pedal control, brake control, over-speed control, or motor overload. The regulator unit consequently effectuates an adequate cutoff of power supply.

Abstract: A mounting structure is provided to mount, on the same circuit board, two types of electrical parts in each of which an operating member is rotatably supported by a housing including sliders and a conductive pattern, such as a contact pattern, and which are similar in arrangement of terminals to extend terminal-insertion holes of the circuit board. Each of the electrical parts has a positioning protrusion protruding from its bottom face, and the position of the positioning protrusion differs according to the type of the electrical part. In a mounting region of the circuit board for each electrical part, a positioning hole is provided in which only the positioning protrusion of the corresponding electrical part can be inserted. Preferably, the positioning protrusion protrudes from a bottom face of a bottom plate member attached at the bottom of the housing.

Abstract: An information process of various kinds of haptic information such as a temperature, pressure, and the like, which is approximate to human haptic sense, is easily achieved in a wide variety of applications in different fields such as detection of various three-dimensional patterns, the surface states of paper and the like, an input device to an information apparatus, and the like without damaging a device. To this end, a single haptic information element simultaneously handles a plurality of kinds of information, i.e., a temperature and pressure, using a ferroelectric or pyroelectric which responds to both the temperature and pressure. Furthermore, not only these pieces of information are detected, but also some or all pieces of detected information are expressed under the control using an external power supply by forming the ferroelectric or pyroelectric on a hollow space structure, i.e., a cantilever or simple beam.

Abstract: A power switching device has a power switching transistor connected in series in a load circuit with an inductive load portion and a commutation circuit. The commutation circuit is connected in parallel with the gate-drain or base-collector path of the power transistor and has a first Zener diode, which determines the commutation clamping voltage for switching on the power switching transistor during commutation, and an oppositely biased normal diode that is connected in series with the first Zener diode. The commutation circuit further has control elements in order to reduce, during a short time, the commutation clamping voltage at the beginning of each commutation cycle or after an adjustable delay from the beginning of each commutation cycle.

Abstract: A drive circuit includes a gate voltage detector that detects a gate-emitter voltage Vge that appears between the gate and emitter of a power semiconductor device throughout a detection time period during which a sampler allows the process of detecting the gate-emitter voltage Vge, and that recognizes the occurrence of an abnormality in the power semiconductor device when the gate-emitter voltage Vge exceeds a reference value. Therefore, the drive circuit can protect the power semiconductor device with higher reliability by promptly detecting the occurrence of a short circuit even when the power semiconductor device is resistant to high voltages.

Abstract: An apparatus to indicate a state where a communication device connected to a communication wire and a power line is protected from a surge current. A toroidal coil picks up a rapid increase of current caused by a rapid increase of voltage that occurs in the communication wire and/or the power line. The toroidal coil is connected to the current detecting unit. The current detecting unit converts the current from the toroidal coil into a voltage and supplies it to a switching circuit. The switching circuit turns on an indicator light circuit to light up an LED of the indicator light circuit.

Abstract: Disclosed is an antenna radiation heater (2) to heat material using molecular resonance. A plurality of surface antenna elements (3), each having a carrier surface material (11) and a radiation coating (10) applied thereon are connected by two spaced apart electrical conductors (14, 15) in parallel, with electrical contacts as antenna limiters and with which high-frequency electromagnetic radiation can be emitted. The antenna (2) includes a harmonic generator, coupled to electrical conductors (14, 15) of element (3) for excitation of the coating (10) for emitting an oscillation spectrum within the range of natural molecular frequencies of the material being heated. The radiation coating (10) is unilaterally applied to the carrier material (11) and forms an element front facing the material being heated.