Abstract: A faulted circuit indicator device for mounting on an overhead conductor cable for electrical power distribution systems to detect an abnormally high electric current therein includes a housing having an enclosure formed therein and current sensing circuitry for detecting the presence of the abnormally high electric current in the cable. An indication unit is responsive to the current sensing circuitry to produce a visual indication in the presence of the abnormally high electrical current. A clamping mechanism formed of a yoke and a pair of opposed pressure plates is disposed above the housing for securely mounting the cable therein to detect the abnormally high electric current. Compression springs are provided for resiliently urging the pair of opposed pressure plates upwardly for automatically trapping the cable in a fixed central position between the yoke and the pair of opposed pressure plates.

Abstract: Methods and systems to detect droop events on-chip, which may include a sensor circuit located adjacent to a voltage node to convert a corresponding voltage to a digital count or value indicative of the voltage. The sensor circuit may include an n-stage ring oscillator and an asynchronous counter. The sensor circuit may include circuitry to capture and convert a phase associated with a count to a binary fractional value to increase voltage resolution. Multiple counts associated with the node may be evaluated at the node to identify minimum and maximum counts and corresponding time stamps. More complex evaluation and control circuitry may be shared amongst a plurality of sensor circuits and may include circuitry to generate and compare counts to one or more variable thresholds, circuitry to average counts over time, and memory to store state values associated with the sensors.

Abstract: A polarity tester is engagable with an electronic communication port to test the polarity thereof. A connector is supported on a housing and features a plurality of electrical contacts for placement into electrical connection with a respective plurality of electrical contacts in the communication port when the connector is selectively engaged therewith. The plurality of electrical contacts include a power supply contact and a ground contact and a conductive path is defined within the housing to extend between the power supply and ground contacts. An indicator is connected within the conductive path to provide to a user of the polarity tester, when the connector is engaged with the communication port, an indication of whether electricity flows into the conductive path from the respective plurality of electrical contacts in the communication port through the power supply contact.

Abstract: The method for operating an electrical machine (32) having three phases (A, B, C) and a connection associated with each of the phases (A, B, C) for determining the rotor position (?), including the rotor polarity at a standstill, comprising, for at least two of the phases: a) applying a pulsed voltage (Up) between the two connections associated with the other two phases; b) measuring the voltage thus induced at the connection associated with the phase; c) analyzing the variation of the referenced induced voltage over time; and d) determining the rotor polarity on the basis of the referenced analyses. A measure of the deviation of the variation of the induced voltage over time compared to the variation of the pulsed voltage (Up) over time is advantageously determined in step c). Rotor position (?) is determined in a quick, accurate, cost-saving, and space-saving manner.

Abstract: A voltage indicator for mounting on a power cord (FIG. 3) for indicating the presence or absence of a single-phase AC voltage potential on a monitored power cord for a grounded AC power distribution system. The indicator comprises; a housing (16,18), an electronic display (10), a static suppression resistor (12), a first conductive element (14) in physical proximity to the monitored power cord, and a second conductive element (22) meant to be touched by a human being to provide a visual indication of the presence or absence of a voltage potential on the monitored power cord. A capacitive coupling (FIG. 1) takes place between the “hot” conductor of the power cord and the first conductive element (14) of the indicator. This causes a voltage drop across the display (10) and the resistor (12) in parallel with the display (10). The current flow from the display (10) and the resistor (12) merge together to return to ground through a human being touching a second conductive element (22).

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform at least one additional test including: determining whether the receptacle is wired properly; determining a location of a circuit interrupting device electrically coupled to the branch circuit by creating a second pulse on the branch circuit that can be sensed by a receiver located proximately to the respective circuit interrupting device and broadly tuned about a frequency of the second pulse; and testing a ground fault circuit interrupter electrically coupled to the branch circuit by creating a third pulse on the branch circuit that is effective to trip the ground fault circuit interrupter.

Abstract: An operation detection device for an overcurrent protection component that detects a transition event between a closed state and an open state of the protection component includes an event sensor positioned at a location selected to allow the event sensor to detect the transition event and a current sensor positioned at a location selected to detect a current passing through the overcurrent protection component and to generate a first output signal based on a level of the detected current. A switch circuit operatively coupled to the event sensor is configured to generate a second output signal indicating a change in state of the overcurrent protection component responsive to detection of the transition event by the event sensor.

Abstract: A clamp meter is provided for measuring consumption of current and power of an electrical appliance. The clamp meter includes a power inlet port and a power outlet port that are in controlled connection with each other. A current detection element is arranged between the power inlet port and the power outlet port. When the power inlet port is connected to a power source and the power outlet port is connected to an electrical appliance to be detected, with the electrical appliance turned on, the current detection element detects and converts the current flowing through the power outlet port into a digital signal, which is displayed on a display device mounted on the clamp meter, whereby, through the data and information displayed on the display device, a user may get aware of the power consumption of the electrical appliance and abnormality of power consumption thereof.

Abstract: The clamp meter contains a revolving member configured between the meter's body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively. The first base and the second base are revolvably joined together by an axle extended axially from the body member into the jaw member via the first and second bases' aligned axle holes. The first base has at least a roller ball elastically embedded in a concave and exposed towards the second base. The roller ball would roll into one of a number of notches of the second base as the base and jaw members are rotated relative to each other, thereby creating a number of preset configurations of the included angle between the body and jaw members.

Abstract: A three-phase faulted circuit indicator adjustable to accommodate a variety of three-phase power cables is disclosed. In one embodiment, faulted circuit indicator comprises a flexible holder that encircles the monitored conductor slightly more than one time. The flexible holder includes a plurality of magnetic sensors for monitoring the current within the internal conductors of the power cable, a logic circuit for determining the occurrence of a fault, and an output device for providing an indication of a fault. In a second embodiment, the faulted circuit indicator comprises a plurality of sensor compartments, each disposed about a central point, and each coupled to two other sensor compartments.

Abstract: The present invention is an attachment device and a method for fastening and removing an electrical cable monitoring instrument to an electrical cable. The attachment device comprises monitoring instrument sensor with opening for positioning electrical cable such that said electrical cable can be positioned to pass through the sensitive volume at least partially surrounded by said sensor, at least one elongated elastic member securely attached to said cable monitoring instrument such that, when elastically deformed to a shape characterized by high mechanical energy such that deformed elastic member allows said electrical cable access to and from the sensitive volume at least partially surrounded by said monitoring instruments sensor.

Abstract: An instrument for testing an electrical circuit includes a housing, a printed circuit board disposed within the housing, and at least one probe in electrical communication with the printed circuit board. The instrument further includes a plurality of panels disposed within the housing, wherein each one of the plurality of panels has an indicator. Each of the plurality of panels is capable of being activated into an on state in response to an electrical measurement. When at least one of the plurality of panels is activated the indicator on that panel substantially corresponds to a magnitude of the electrical measurement.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform at least one additional test including: determining whether the receptacle is wired properly; determining a location of a circuit interrupting device electrically coupled to the branch circuit by creating a second pulse on the branch circuit that can be sensed by a receiver located proximately to the respective circuit interrupting device and broadly tuned about a frequency of the second pulse; and testing a ground fault circuit interrupter electrically coupled to the branch circuit by creating a third pulse on the branch circuit that is effective to trip the ground fault circuit interrupter.

Abstract: An exemplary AC detecting apparatus for detecting operating states of an AC power supply includes a detecting circuit connected to an AC power supply, the detecting circuit comprising a photocoupler having a luminous element with the anode connected to a live line of the AC power supply and the cathode connected to a neutral line of the AC power supply, and an optical receiving block with the cathode grounded and the anode connected to a first power source via a resistor; and a processor comprising an interrupt terminal connected to the anode of the optical receiving block, and an output terminal, wherein the detecting circuit detects the AC power supply to send a trigger signal to the processor for triggering a detecting program preinstalled in the processor to real-time analyze the operating states of the AC power supply, and outputs a result of the program via the output terminal.

Abstract: A polarity tester is engagable with an electronic communication port to test the polarity thereof. A connector is supported on a housing and features a plurality of electrical contacts for placement into electrical connection with a respective plurality of electrical contacts in the communication port when the connector is selectively engaged therewith. The plurality of electrical contacts include a power supply contact and a ground contact and a conductive path is defined within the housing to extend between the power supply and ground contacts. An indicator is connected within the conductive path to provide to a user of the polarity tester, when the connector is engaged with the communication port, an indication of whether electricity flows into the conductive path from the respective plurality of electrical contacts in the communication port through the power supply contact.

Abstract: A mobile apparatus for monitoring an electric field in a patrolled area, comprising at least one detection device for measuring electric field signals, at least one camera device for collecting video images of said patrolled area, a processor for correlating video image data collected from the camera device with electric field signal data measured by the detection device, and a video based graphical user interface for analyzing and capturing a monitored event depicting an anomaly in the measured electric field signals.

Abstract: A high-voltage detecting circuit for saving power in a standby mode is provided. The high-voltage detecting circuit includes a high-voltage detecting module, a switch module and a control module. The high-voltage detecting module is composed of several resistors for detecting a high-voltage power supply. A control terminal of the control module is controlled by the power supply to switch off the switch module when the power supply stays at the standby mode, ensuring that the power loss of the high-voltage detecting module is eliminated.

Abstract: A device which may be utilized as a circuit testing device or a power source conductor device includes a handle with a single lead wire electrically connected to a light in series circuit with a probe. Further included is a push button switch on the side of the handle which may be manually moved to disengage the light from the circuit and simultaneously enable a series circuit directly to the probe to thereby provide a power source.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform an additional test of determining whether the receptacle is wired properly.

Abstract: A voltage detecting device and an analog-to-digital converter (ADC) using the same are provided. The voltage detecting device determines whether input voltage is higher than threshold voltage based on contact of a strip and a membrane. Therefore, high resolution and high speed operation is possible, but with consuming lower power, and an element capable of performing the function of resistor and comparator is provided. Furthermore, a more effective ADC may be provided using the above.

Abstract: The voltage presence indication device comprises a collector electrode (2) designed to have at least one capacitive connection (5) with an electrical ground (6) or a capacitive connection (3) with an electrical conductor (4) to be monitored, and display means (7) connected to said collector electrode (2) to indicate the presence of an electrical voltage in said electrical conductor to be monitored. The display means comprise at least one multilayer device (11). The multilayer device comprises a light-emitting layer (12) arranged between a first insulating layer (13) and a second insulating layer (14), a first conducting layer (15) arranged on the first insulating layer (13) and connected to said conducting electrode (2), and a second conducting layer (16) arranged on the second insulating layer (14). An electrical apparatus comprises such a device.

Abstract: The present invention provides a device for automatic detection of battery polarity, wherein a detector circuit is structured from detector terminals, detector units, positive voltage electrical connecting units and negative voltage electrical connecting units. Operational procedure involves first connecting battery electrical conducting units with the detector terminals of the detector circuit, when the detector terminals are connected to positive poles of the battery, then one set or more than one set of the detector units of the detector circuit detect positive voltage, which actuate an electrical connection with the positive voltage electrical connecting units, thus connecting positive poles of the detector device to the detector terminals and connecting to positive poles of the battery, at the same one set or more than one set of the detector units determine negative voltage and actuate a connection with the negative voltage electrical connecting units, thereby forming a complete circuit.

Abstract: A semiconductor leakage current detector of the present invention includes a first analog switch which causes a current to be measured to flow or to be cut off, a second analog switch which causes a reference current to flow or to be cut off, an integral capacitance element which is connected by the first analog switch and the second analog switch and is charged with the current to be measured or the reference current, a discharge unit which discharges the integral capacitor, and a comparison unit which compares the reference voltage with each of an integral voltage generated in the integral capacitor by a reference current after the discharge of the integral capacitor and an integral voltage generated in the integral capacitance element by the current to be measured after the discharge of the integral capacitor.

Abstract: When analysing saccharides by HPAEC, the eluate from the column is typically analysed using a amperometric detector. According to the invention, amperometric detection is coupled with ultraviolet detection, with both methods being applied to the eluate. Thus the invention provides a method for analysing the eluate from a liquid chromatography column, wherein the eluate is analysed by both (a) amperometric detection and (b) ultraviolet detection. The information content derivable from using both sorts of detection advantageously exceeds that derivable from either of the two detection methods alone.

Abstract: The subject of the invention is an indicator of presence of AC voltage in medium or high voltage conductors and/or conducting elements of transmission and distribution systems, whose basic AC voltage detecting and indicating element is a liquid crystal display (1). The indicator according to the invention is characterized in that its housing (8) has the shape of a frame closed by a transparent plate (9) on the front and by a conducting element (10) on the back. At least one row of circumferential ribs (11) is positioned around the frame window. The liquid crystal display (1) is placed hermetically between the transparent plate (9) of the frame window and the conducting element (10) and it has electrodes in the form of conducting segments.

Abstract: A circuit component tester includes a portable casing and a circuit provided within the casing. A plurality of leads are provided to electrically connect the circuit to a gate and two terminals of a circuit component under test. A test switch provided on the casing initiates application of test voltage to at least one of the two terminals of the circuit component under test. A gate switch provided on the casing initiates application of gate voltage to the gate of the circuit component under test. At least one of the test switch and the gate switch are operable to verify functionality of the circuit component under test.

Abstract: Provided is a system, a tool and a method for communicating with a faulted circuit indicator (FCI), the faulted circuit indicator including a detection circuit for monitoring an electrical conductor of a power system. The system includes a remote display mounted in a wall of an enclosure and visible from outside of the enclosure and a first light emitting diode associated with the remote display. The first light emitting diode generates an optical FCI status signal in response to an occurrence of a fault in the electrical conductor. The system also includes a first microcontroller operatively coupled to the remote display and the detection circuit, and a handheld user command tool adapted to optically couple with the remote display. The handheld user command tool is also adapted to generate an optical serial communication. The optical serial communication provides data and commands for operation of the faulted circuit indicator.

Abstract: A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from pulse-width modulated pulses, or lower frequency sinusoidal signals with higher frequency components, and at the same time an on-screen icon indicates to a user that the filtered mode has been selected. The user can switch back and forth between filtered and unfiltered modes. The filtered measurement mode is useful in measuring the outputs of modern adjustable-speed motor drives, uninterruptible power sources, and switch power supplies.

Abstract: A non-contact voltage detector having a self-test feature is provided. The non-contact voltage detector may include an antenna, a detection circuit and a self-test circuit. The self-test circuit may be configured to send a test signal through a portion of the antenna and to the detection circuit. Alternatively, the self-test circuit may be configured to send a test signal to the detection circuit without sending it through a portion of the antenna.

Abstract: A connector with AC/DC test LEDs is formed of a pair of different colored LEDs connected in parallel to each other in a test and alarm circuit which is connected to a power source. One LED is forward-biased, while the other reverse-biased. If the power source to which the connector is connected is AC, both LEDs are turned on. If that power source is DC and the circuit is connected with correct polarity, only the forward-biased LED is turned on. If that power source is DC and the polarity is reverse-connected, only the reverse-biased LED is turned on. With this scheme, hazardous accidents and electrical damage can be prevented.

Abstract: A fault indicator for indicating the occurrence of a fault in an electrical conductor has a housing, a high capacity battery, at least one light emitting diode (LED) visible from the exterior of the fault indicator upon the occurrence of a fault and which may be automatically reset to a non-fault indicating position a predetermined time after the occurrence of the fault, and electronic circuitry for sensing a fault, for actuating the LEDs to indicate a fault and for resetting the LEDs to a non-fault indicating condition a predetermined time after the fault has occurred. The electronic circuitry conserves energy by drawing insubstantial current from the high capacity battery during non-fault conditions. The electronic circuitry may also include in-rush restraint to avoid false tripping of the fault indicator during surges. An inrush restraint circuit has an output signal that is logically combined with a fault indicator signal to disable the fault indicator during inrush conditions.

Abstract: A status indicator indicates an operating state, including an electrical malfunction, of an electrical load that is located and controlled from locations remote from a monitoring location.

Abstract: An assembled capacitor polarity automatic inspecting method and system is proposed, which is designed for use to perform an automatic inspecting procedure to check whether an array of polarized capacitor are mounted correctly in polarity on a circuit board; and which is characterized by the use of computerized technology to automatically check whether each assembled capacitor on the circuit board is mounted correctly in polarity and automatically generate an inspection report in electronic form to show the result of inspection. This feature allows the QA/QC procedure on the circuit board not only to save labor and time but also to be much more accurate and efficient than the prior art.

Abstract: A three phase receptacle tester including a housing, an electrical connection and a coupling assembly. The housing includes an outer surface, an opening and an inner cavity, wherein the opening provides access to the inner cavity. The electrical connection assembly having a body, condition indicators and a coupling assembly. The body having an outward surface, an inward surface and a periphery. The periphery of the body matingly engaging the opening of the housing, so as to preclude access to the inner cavity. One prong extends from the outward surface of the body for each phase and one prong extends from the outward surface of the body corresponding to a ground/common. Each of the prongs spaced radially outward from a central axis. Each of the phase prongs electrically connected with the ground/common prong and the condition indicator positioned therebetween. The condition indicator identifies at least one of current flow between a respective phase prong and the ground/common prong.

Abstract: A voltage detector used to determine if an exposed or unexposed wire or terminal is “hot.” The voltage detector includes a low density EMF field detecting circuit and a high density EMF field detecting circuit each coupled to an indicator to inform the user that the “hot” wire or terminal is nearby. In the preferred embodiment, the voltage detector includes an LED flashlight that uses a voltage multiplying circuit that enables it to use a single AA or AAA battery. The voltage multiplying circuit raises the battery voltage from 1.5 volts to approximately 5 volts required to sufficiently energize the main LED. In the preferred embodiment, the LED's reflector acts as the sensor probe for detecting the presence of electric field densities.

Abstract: A probe apparatus disclosed for use in a separable connector includes an insulating body and spaced apart first and second electrical conductors in contact with the insulating body. The first and second electrical conductors have adjacent surfaces configured such that when an electrical potential is applied between the conductors, an electric field is formed between the conductors. The insulating body has an opening positioned between the conductors and adapted to receive a sensor such that a portion of the sensor is subjected to the electric field. A separable electrical connector system is described including the probe apparatus, as is a voltage sensing system including the probe apparatus and a voltage sensor positioned within the opening of the insulating body.

Abstract: The present invention relates to a circuit arrangement and a method for load diagnosis of a switch having a first and a second load connecting terminal. A first and a second current source arrangement are provided, which can in each case be connected to one of the load connecting terminals of the switch and which supply, depending on potential conditions at the said load connecting terminals, currents in a first and second current direction or oppositely to the said first and second current direction to the load connecting terminals. Furthermore, an evaluation circuit is provided, which evaluates the currents flowing to the first and second load connecting terminals and provides a load state signal depending on the said currents.

Abstract: A voltage sensor is described that consists of a plurality of identical series-connected sections, where each section is comprised of an arrangement of impedance elements. The sensor is optimized to provide an output ratio that is substantially immune to changes in voltage, temperature variations or aging. The voltage sensor can be scaled to various voltage levels by varying the number of series-connected sections.

Abstract: A system having a screen, in particular a flat screen, and having an external power supply unit that can be connected by a plug connector to the screen in order to supply the screen with a DC voltage. The system provides a signaling device at the power supply unit end and a comparator at the screen end for comparison of the operating parameters of the power supply unit with nominal operating parameters. A fault signaling device is provided for indicating unacceptable discrepancies between the signaled operating parameters and the stored operating parameters.

Abstract: A fault indicator for indicating the occurrence of a fault in an electrical conductor is automatically configured for an overhead application or for an underground application. The fault indicator has a housing, a battery, a display for indicating the occurrence of a fault, a current sensor for sensing the load current in a monitored conductor, and electromagnetic field sensor to sense the electromagnetic field about the conductor, and a microcontroller for determining whether a fault condition occurred, for determining the magnitude of the electromagnetic field, and for configuring the fault indicator in the overhead configuration if the electromagnetic field is above a predetermined magnitude or configuring the fault indicator for the underground mode if the field is below the predetermined magnitude.

Abstract: Embedded controller(s) in an information handling system have real-time status and activities represented by indicators, such as light emitting diodes (LEDs), associated with the embedded controller(s). These indicators may be monitored for example by operating (management software, e.g., Embedded Server Management (ESM) software. In addition, edge triggered latches and a timer detect and store flash patterns of these LED indicators so that the flash pattern information may be read by the operating management software as static signals.

Abstract: A 240 volt outlet tester is described. The 240 volt outlet tester includes a housing with three or four prongs extending outwardly from a base of the housing. The prongs are designed so that they can be inserted into either a three or four wire 240 volt outlet. Indicator lights are integrated into the housing. A test circuit is located within the housing. The test circuit is designed to detect whether the 240 volt outlet has been wired correctly. If the 240 volt outlet is correctly wired, all the indicator lights integrated into the housing illuminate. If the 240 volt outlet is improperly wired, one or more indicator lights do not illuminate.

Abstract: A method of controlling a relative movement of a cutting blade and a workpiece which are moved relative to each other by a movement device in an operation with a machine tool. The method includes a step of bringing the cutting blade and an object into contact with each other, by moving at least one of the cutting blade and the object toward each other by the movement device, and a step of controlling the relative movement on the basis of a relative position of the cutting blade and the object which is detected by the movement device upon the contact of the cutting blade and the object with each other.

Abstract: A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from pulse-width modulated pulses, or lower frequency sinusoidal signals with higher frequency components, and at the same time an on-screen icon indicates to a user that the filtered mode has been selected. The user can switch back and forth between filtered and unfiltered modes. The filtered measurement mode is useful in measuring the outputs of modern adjustable-speed motor drives, uninterruptible power sources, and switch power supplies.

Abstract: An electrical power probe is provided. In one aspect, an electrical power probe includes a power probe control unit adapted to connect to a direct current (DC) power source and receive an input source voltage from the DC power source. The power probe control unit comprises a power switch controlling the switching of the input source voltage to a cable. A power probe wand includes a conductive wand tip and a user controlled switch, with the wand tip being connected to the power switch by the cable. The power probe control unit sends a query message to the power probe wand. The power probe wand unit sends a response to the power probe control unit in response to the query message, with response indicating the position of the user controlled switch. The power probe control unit selectably switches the power switch based on the position of the user controlled switch.

Abstract: A fault indicator for indicating the occurrence of a fault in an electrical conductor is reset at a predetermined time after the fault is detected, such as about 4 hours. The fault indicator has a housing, a high capacity battery, a fault sensor, a display for indicating a fault condition, and a programmable controller with a sleep state that draws low quiescent current. As a result the battery is expected to last the lifetime of the fault indicator. The fault indicator may optionally include current inrush restraint and/or voltage inrush restraint to inhibit the controller from activating the display to the fault indicating condition during the inrush conditions. The electromagnetic field about the conductor causes an electrostatic sensor to develop a differential voltage signal between two electrodes of different areas for the voltage inrush restraint circuit. Auxiliary contacts are provided to remotely monitor the fault indicator.

Abstract: A fault indicator for indicating the occurrence of a fault in an electrical conductor has a plurality of trip settings, such as in the range of 50 A to 1200 A, that is automatically calibrated. The fault indicator includes a housing, a battery, an illuminated display, such as LEDs, a current sensor for sensing the load current in the conductor and a microcontroller that receives a current signal from the current sensor to determine the load current. In the calibration mode, a known load current is passed through the conductor, the microcontroller selects the trip level that is related to the load current, determines the load current from the current signal, and sequentially calibrates each of the plurality of trip levels for the respective known load currents. The calibration information is stored in memory. The illuminated display provides a distinctive pattern to indicate that each trip setting has been calibrated.

Abstract: This invention relates to a limited range low voltage testing, regulating, and indicating device comprising a detector and low voltage measurer of magnitude in a switch-regulated power supply circuit wherein indicator LEDs are operated directly from a power supply wherein continually increasing current draw provided by shunt switching operates to cause the first display LEDs to “fade” in an overlapping pattern of activation, in and out with slight voltage changes. Increased voltage causes a second LED to turn on. Further increased voltage causes the second LED to turn off and a third LED to turn on. Shunt and series connected voltage regulators selectively exert control over the LEDs.

Abstract: A handheld dual voltage circuit tester, method and electronic circuit that quickly allows a technician to determine whether an automotive electrical system runs on a 12-14 volt circuit or 36-42 volt circuit. The tester may be used for automobiles having a single voltage electrical system, or automobiles with distinct electrical systems operating on one of a 12-14 volts circuit or a 36-42 volt circuit. The tester includes a screwdriver-type elongated handle and probe tip. The tester also includes electronic circuitry disposed within its handle, heat shrink tubing, a conductive spring assembly, a strain relief, a retractable coil cord, a ground clip and insulation that encloses the ground clip. The tester also includes electronic circuitry that emits light of a first color when a 12-14 volt circuit is sensed, and light of a second color when a 36-42 volt circuit is sensed.

Abstract: The present invention is directed to an adjustable electrical outlet box assembly comprising an outlet box, an electrical outlet assembly, and an adaptor. The adaptor is located between the box and the outlet assembly and is positioned at least partially within the box. The adaptor includes opposing mounting flanges and opposing outlet assembly support tabs that are displaced from the mounting flanges. The adaptor may be adjusted to different heights, relative to the outlet box, to accommodate different thicknesses for different floor or wall covering materials. Due to the offset between the adaptor mounting flanges and the outlet support tabs, the outer surfaces of the outlet assembly will lie generally in the same plane as, or slightly recessed from the plane of the mounting flanges. The resulting outlet box installation can be used with a flush mounted cover plate which protects and secures the electrical outlet assembly.