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7570183 |
System of multi-channel analog signal generation and controlled activation of multiple peripheral devices
The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the...
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6856924 |
Mixer-based timebase for sampling multiple input signal references asynchronous to each other
Sampling is performed. A strobe signal is generated from a first signal. Multiple sampled signals are sampled using the strobe signal. Each of the multiple sampled signals is synchronous with its...
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6828814 |
Circuit configuration and display element
A circuit configuration has an integrated semiconductor element, preferably, an intelligent power semiconductor, and a display element. A display element diagnoses and displays disturbances in the...
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6483316 |
Method of diagnosing partial discharge in gas-insulated apparatus and partial discharge diagnosing system for carrying out the same
The present invention provides a method of diagnosing a partial discharge in a gas-insulated apparatus and a partial discharge diagnosing system for carrying out the same to achieve highly accurate...
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6313635 |
High voltage sensor assembly
A high voltage sensor that is adapted to be connected to a terminal. The terminal is disposed in a housing having an outer surface and having a chute extending inwardly from the outer surface to a...
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6255808 |
Device for measuring partial discharge in gas-insulated high voltage facilities, the device having a HF sensor and UHF sensor
To perform a reliable and calibrated measurement of partial discharges, a first calibratable sensor and a second sensor are arranged in a metal enclosure. The first calibrated sensor picks up...
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5675246 |
Current flow indicator
An apparatus connectable between a current source and an electrical load for indicating current flow through the load above a threshold level. The indicator includes two negative temperature...
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5572116 |
Surge counter
A surge detecting element which is connected to surge invading lines and is composed of a gap type discharge tube and a nonlinear resistor both connected in series with each other and one or more...
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5430604 |
Hand-held electrostatic discharge generator
An electrostatic discharge generator device for generating/simulating controlled electrostatic discharges, in both positive and negative polarities is disclosed for testing electronic equipment....
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5412312 |
Frequency and instantaneous voltage level meter
A volt/frequency meter includes LED arrays which provide bar-graph style meter displays of the instantaneous voltage and the frequency of a variable electric analog signal. Each LED in the voltage...
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5166610 |
Dual range speed indicator with acceleration display
A solid state speed indicator for railroad locomotives is provided with a plurality of indications in addition to speed. These include an acceleration indicator and an overspeed indicator. In...
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5150051 |
Home gaussmeter with filter-integrator circuit for measuring elf radiation
A meter (10) for measuring extremely-low-frequency radiation includes a coil circuit (22) whose output is filtered by a sharp-cut-off high-pass filter (24) to pass standard house-current...
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5119426 |
Linear array level meter displaying multiple audio characteristics
A linear display device provides a floating bar type of display for instantaneous peak values and instantaneous average values of an audio signal. Pairs of respective peak and average comparators...
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5075620 |
Hot line indicator
A voltage detector/indicator unit includes a plurality of lights for indicating a voltage within one of a plurality of different voltage ranges by lighting the lights in a selected pattern.
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5065104 |
Fault sensing with an artificial reference potential provided by an isolated capacitance effect
A ground fault detector has a neon bulb connected between a rectangular copper plate connected to an antenna wire and a resistor connected to one arm of a double-pole double-throw relay with the...
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5055772 |
High voltage ignition system monitor for spark initiated internal combustion engines
A method and device for continuously monitoring the distributed high voltage pulses from an ignition coil of an electrical system of an internal combustion engine is disclosed. The device is a...
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5008613 |
Voltage tester for graduated optical display of a voltage and method for its manufacture
A voltage tester for the graduated display of a voltage applied to two test tips includes a circuit arrangement composed of a parallel connection of three series circuits whereby a PTC-resistor, an...
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5003249 |
Electrical power detection and indication device
An electrical power detection and indication device for quick and simple external attachment onto an insulated electric power cord, is linked to the conductors of the power cord by sharp probes...
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4946393 |
Separable connector access port and fittings
The invention is the provision of an access to the interior of a high voltage separable connector component by providing a projection of insulating elastomeric material integral with the insulating...
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4870343 |
High voltage detector
A high voltage detecting device has an input terminal for receiving electrical energy and includes a first circuit having a gas filled tube receiving electrical energy from the terminal. The gas...
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4827213 |
Apparatus for the contactless determination of variable intervals of distance by pulsatory spark discharges
An apparatus including at least two electrodes determining two intervals of distance of a body relative to movable objects and activated by a respective high voltage pulse generator, wherein the...
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4806854 |
Current draw and power consumption display circuit
A circuit layout for continuous display of power consumption of an electric device includes a light emitting diode actuated by voltage pulses, the frequency whereof corresponds to the current draw...
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4804909 |
Atto-amperemeter
An atto amperemeter includes a shop tip (1) correctable to a voltage source (18) providing a known potential (U') via a sample conductor measured, the tip (1) faces a particle detector such as an...
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4594546 |
Voltmeter for remotely sensing high voltages
A passive voltmeter that measures pulses of high voltage by periodically charging a condensor through a spark gap. The frequency at which the spark gap breaks down is a function of the voltage...
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4559496 |
LCD Hook-on digital ammeter
A low cost hook-on ammeter for consumer use includes a split core to be clipped around a conductor. Secondary turns on the core actuate a liquid crystal digital display to indicate alternating...
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4532472 |
LED level meter
A stereo sound level display device includes a single array of light emitting diodes aligned in a line. The left channel sound signal level is detected to display the left channel sound signal...
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4528501 |
Dual loudness meter and method
A dual loudness meter and method for simultaneously indicating the apparent loudness of composite audio program material representing peak material or of persistent material employing a first...
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4471300 |
LDC Hook-on digital ammeter
A low cost hook-on ammeter for consumer use includes a split core to be clipped around a conductor. Secondary turns on the core actuate a liquid crystal digital display to indicate alternating...
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4470007 |
Apparatus for testing the electrical breakdown resistance potential of insulating media and/or cooling media
The invention relates to an apparatus for testing the electrical breakdown resistance potential of insulating media and/or cooling media, especially of synthetic insulating oils for transformers,...
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4438396 |
Low cost volt/ampere meter with liquid crystal display
A low cost volt/ampere meter for consumer use employs a single liquid crystal bargraph display and a simple voltage divider network to display both line voltages and appliance currents encountered...
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4434402 |
Electrical equipment
An igniter test unit produces a square wave voltage that is applied across a parallel circuit comprising a first capacitor and a series arrangement of a second capacitor and diodes. An inductance...
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4388589 |
Color-emitting DC level indicator
A DC level indicator represents a sensed DC level by a color of emitted light. The indicator includes a plurality of lamps or LED's, each emitting a respective primary color, and a current-feeding...
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4386315 |
Electric field detector
Apparatus for detecting electric fields and providing an indication of their magnitude includes a glass bulb containing a gas such as neon. When the bulb is placed in a time varying electric field,...
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4301407 |
Hand held testing device for indicating an electric test voltage
There is disclosed a hand-held testing device for indicating different values of an electric test voltage. The testing device comprises at least one grip body adapted to be held in the hand and an...
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4301406 |
Microwave warning device
A device for warning a person carrying or wearing it of the presence of dangerous microwave radiation is fully powered by the radiations being detected. A very low-wattage gas-discharge lamp is...
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4296375 |
Level indicator for indication of maximum values
A level indicator comprising a plurality of comparators for comparing an analog signal with a respective value of graduated reference voltages generates one or more output signals in response to...
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4263550 |
Test point mounted circuit condition indicator
Indicating devices for mounting on a test point in an alternating current distribution system provide a visual indication of either voltage level or fault occurrence in the system. The indicating...
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4262255 |
Level indicating device
A level indicating device for indicating input signal level purely electrically which includes a plurality of voltage comparators having threshold values set in order in terms of level, and a...
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4251769 |
Indicator and limit value alarm device
The present electronic indicator or display device is equipped with adjustable upper and/or lower limit value markers to provide a respective alarm if such limit values are exceeded or not reached....
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4243985 |
Analogue voltage indicator with sequence of light emitting diodes
A circuit serves to illuminate appropriate light emitting diodes of a sequence to provide a bar graph type display of an analogue input voltage. The light emitting diodes are divided into sets with...
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4225817 |
Combined continuity and voltage test instrument
An electrical testing device comprising two circuit legs connected in parallel to a pair of test probes. The first circuit leg is primarily for indicating continuity and includes a battery in...
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4214200 |
Light-emissive electrical measurement apparatus with floating inputs
An electrical meter has light-emissive display elements and a meter circuit featuring electrically floating input terminals relative to device ground, and offers a potentially significant cost...
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4213125 |
Display system having voltage comparator circuit
In a display system having one comparator for comparing an input voltage signal with a reference voltage signal, the reference voltage signal is successively changed in accordance with a timing...
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4206404 |
Vacuum fluorescent indicator
A vacuum fluorescent display has a filament heated below incandescence and phosphor coated anodes. A foraminous charge-control electrostatic lens between the filament and the viewer both controls...
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4177422 |
Apparatus and process for generating an ionized gas or plasma by microwave energy
A method and apparatus for the generation of an ionized gas or plasma for measurement of ultra-high frequency electromagnetic radiation utilizing a casing containing an ionizable gas, an...
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4166245 |
Simultaneous display of multiple characteristics of complex waveforms
Related multiple characteristics of a single complex waveform are displayed as a variable length line of light with a floating spot which moves relative to the line. Logic circuitry, in response to...
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4163130 |
Vacuum interrupter with pressure monitoring means
A vacuum interrupter with pressure monitoring means wherein a pair of separable electrodes are arranged within a highly evacuated envelope and are connected to a high voltage circuit provided with...
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4152643 |
Voltage indicating test point cap
A test point cap provides a visual indication of the voltage level of an alternating current in the conductor of a connector on which the cap is installed. The test point cap includes a bridge-type...
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4144524 |
Magneto-optic bubble domain histograph incorporating gray scale weighting
A display system for providing a real-time, dynamic presentation of an analog signal waveform is disclosed. The system includes an A-D converter that, in turn, drives a serial string of binary...
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4124846 |
Method and apparatus for providing output indications in response to the presence of an electromagnetic energy receptor
A method and apparatus for providing output indications in response to the presence of an electromagnetic energy receptor within a predetermined distance of a glow discharge device the electrodes...
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