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7619419 Wideband active-passive differential signal probe  
A wideband differential signal probe includes separate paths to convert a lower frequency component and a higher frequency component of a differential signal to a lower frequency single ended...
7557586 Electronic battery tester  
An electronic battery tester for testing a storage battery includes test circuitry configured to provide an output based upon a selected test criteria. Additionally, circuitry is provided to assist...
7532492 Host controlled voltage input system for an accessory device  
An accessory device voltage management system includes an accessory device selectively coupled to a host. The host provides a bulk power supply and a low power supply voltage to the accessory...
7049822 Combination battery, light bulb, and fuse tester  
A combination battery, light bulb, fuse tester having novel features. In particular, the tester includes a novel probe apparatus including an actuator, a pair of opposed probe arms, each of the...
6933727 Electronic battery tester cable  
A cable for use with an electronic battery tester includes first and second electrical connections configured to couple to terminals of a battery. A memory is configured to store digital data....
6881974 Probe card for testing microelectronic components  
Various aspects of the invention provide methods of manufacturing probe cards and test systems which may test microelectronic components using such probe cards. In one specific example, a probe...
6773938 Probe card, e.g., for testing microelectronic components, and methods for making same  
Various aspects of the invention provide methods of manufacturing probe cards and test systems which may test microelectronic components using such probe cards. In one specific example, a probe...
6419807 Sensor array for detecting electrical characteristics of fluids  
A sensor array for detecting the distribution of fluids having different electrical characteristics, comprising a multilayer structure including a first layer which defines an array of spaced apart...
6297025 Measurement of complete electrical waveforms of tissue or cells  
A method of observing a physical and chemical property of a tissue or cell by using an apparatus which comprises at least a cell culturing means, an environment conditioning means, an observing...
6191591 Battery cell grading holder  
A cell grading test fixture includes an array of cell sockets electrically interconnected in series so that current through the entire array of cells flows through each of the cells once inserted...
6103408 Electric battery  
In an electric battery, an electronic clock is integrated in the battery container in order to monitor battery functions. The frequency of the electronic clock is varied as a function of at least...
6008652 Battery tub tester  
A battery tub tester is disclosed that tests the individual batteries, battery accessories and connections as they are being assembled into a battery tub for an electric vehicle. The batteries and...
5966014 System for simultaneously testing a plurality of batteries for multiple operating specifications  
This disclosure sets out a multiple battery tester having a tray loaded with a set of batteries. The tray is placed in a receptacle and end located terminals move vertically to clamp a battery. The...
5903154 Battery test contact assembly  
A battery test contact clamp assembly is set forth. In one embodiment, upper and lower printed circuit boards are spaced apart on four corner located mounting rods of conductive metal. The four...
5862515 Battery tester  
A battery tester is formed at an AC constant-current generator for applying an AC current for measurement to a battery BT under test via a coupling capacitor, an internal resistance detecting...
5550474 Battery electrolyte-level and electrolyte-stratification sensing system  
The device uses a sensor probe in which a plurality of electrolyte level sensor coils and/or specific gravity stratification indicators are stacked vertically in the walls of a hollow electrically...
5537042 Method and system for unobtrusively measuring physical properties in electrochemical processes  
Disclosed is a method and system for unobtrusively measuring physical properties in electrochemical processes occurring in a predefined volume, such as the state of charge in an electrochemical...
5376887 Battery tester with apertures for plural types and sizes of cells  
A low profile battery tester uses tapered apertures to located batteries in a thin tablet shaped body for testing. In one embodiment for conventional dry cells, the taper is in openings through the...
5321626 Battery performance monitoring and forecasting system  
Systems of battery cells and batteries are monitored via sensing probes arranged in assemblies providing digital output signals which indicate sensed physical parameters. Digital data strings are...
5128616 DC voltage tester having parallel connected resistive elements in thermal contact with a thermochronic material  
A DC voltage tester having a plurality of resistive elements in thermal contact with a thermochromic material wherein the resistive elements are connected in a parallel configuration.
5093624 Battery monitoring  
Monitoring state of charge of an electric storage battery (18) is done by deliberately inducing eddy currents, specifically using an induction coil (70) in conductive metallic constituents of...
5059895 Battery voltmeter  
The present invention discloses a battery voltmeter comprising: A) a dielectric layer; B) a conductive layer above or below one of the surfaces of the dielectric layer; and C) a...
5003250 Voltage testing device for electric tooth-brush  
A voltage testing device for electric tooth-brushes comprises a device body, a light emitting member mounted to the device body, and a pair of electrical conductors mounted to the device body and...
4763064 Device for measuring the electronic characteristics of solid materials  
A device for measuring the electronic characteristics of solid electrolytes or solid-state electrochemical cells under varying conditions is provided. The device consists of two small flat plates...
4713603 Apparatus for the measurement of the fraction of gas in a two-component fluid flow comprising a liquid and a gas in mixture  
The apparatus has two plate electrodes surrounded by a third electrode. The third electrode is maintained at an electric potential equal to half of the electric potential between the two plate...
4689571 Specific gravity detecting device for lead-acid battery  
A specific gravity detecting apparatus for a lead-acid battery having two electrodes adapted to be immersed in an electrolyte to provide a potential difference therebetween which is indicative of...
4662975 Apparatus for determining the etch rate of nonconductive materials  
A probe that is used to determine the etch rate of a nonconductive material is comprised of a substrate of the material itself, plated on opposite sides with a conductive material. A first side of...
4607227 Open circuit voltage test device  
A portable hand-held open circuit voltage tester for a storage battery that contains a facility for permanently marking the positive terminal post of the tested battery when the open circuit...
4514695 Pocket battery tester  
This invention relates to battery testing devices in general, and more specifically to a compact battery testing device having multiple, extensible, and articulated contact points, which allow...
4451791 Method and apparatus for electrically testing elements of multi-cell batteries  
A method and apparatus for electrically testing individual elements of multi-cell batteries comprises sequentially locating batteries at a test location whereat they are engaged by test probes...
4439736 Battery testing system  
This invention discloses a portable battery tester having a single meter, and which is capable of receiving and yielding charge data for conventional portable batteries of a variety of popular...
4377786 Battery testing apparatus  
Battery testing apparatus is provided for rapidly and automatically testing newly-manufactured electric batteries. The apparatus includes a testing machine which has at least one station, and...
4360780 Dual voltage battery tester  
A battery tester adaptable for testing both 1.5 and 9 volt batteries is disclosed. The tester includes an indicator lamp carried by an arm extending over a base which receives the battery to be...
4334193 Cell tester for use with microprocessor  
A tester of electrochemical storage cells includes a pair of arms arranged for pivoting as jaws, each arm terminating in one member in each of two pairs of Kelvin contacts. A stationary member...
4321542 Method and apparatus for testing charged and dry storable lead storage batteries  
The grid frame surfaces of the plate block are bridged in electrolytically conductive manner. As a result of the forming process, these surfaces exhibit sufficient traces of active mass. A...
4247811 Battery sensor  
A battery sensor for measuring the state of charge, temperature and electrolyte level of a battery. The state of charge is determined by a concentration cell. The concentration cell comprises an...
4214204 High rate, battery testing apparatus and method  
A novel high rate battery testing apparatus and method are disclosed. The high rate terminal blocks are adjustably mounted to service batteries with various terminal posts spacings. After indexing...
4096433 Automatic inspection for the deposition of conductive liquids  
An inspection method and apparatus for the deposition of a liquid material o a part in a manufacturing process. The method utilizes electrical continuity techniques to determine actual application...
4087742 Hot water heater corrosion detector probe  
A method and apparatus for providing a continuous indication of the interior condition of a water heater tank are shown herein. Iron interior surface of water heater tank is normally protected from...
4028618 Circuit for monitoring the conductivity of a solution  
A circuit for monitoring the conductivity of a solution has a four probe conductivity cell which is supplied by a constant current source to provide a signal proportional to the conductivity. A...
3993945 Measuring cells for measuring electrical conductivity of liquids  
A measuring cell for measuring electrical conductivity of liquids having a bore which in operation is contacted by a liquid, the conductivity of which is to be measured and a plurality of...
3956720 Storage battery analyzer  
An instrument for measuring and testing wet cell storage battery charge levels including the total charge level and the charge level of individual cells. The instrument has an autopolarity feature...
3942104 Cell balance detector for electrolytic cell assemblies  
A system is provided for detecting an imbalance in operating voltage between two sodium hypochlorite cell assemblies electrically connected in series. Each cell has associated with it, in parallel,...
3936729 Conductivity measurement probe  
A conductivity measurement probe formed of an electrically nonconducting rigid body which carries a cylindrical flow passage defining a flux channel to polarization current. The body has inlet and...
3927367 Battery testing apparatus  
Apparatus for performing an in situ testing of the condition of a battery positioned within a sealed multi-walled package suited for retail distribution, which battery may form a component of a...
3823367 BATTERY PACKAGE WITH END OF LIFE CONDITION INDICATOR  
A battery pack for small portable and hand-operable devices, arranged to be detent-locked in operating position so long as the battery voltage exceeds minimum satisfactory operating value for the...
3818325 BATTERY TESTING DEVICE  
A battery testing device for testing the cells of a multiple-cell battery, the battery having a cover plate with access holes to provide access to the connecting straps between cells. A panel...
3774105 CONDUCTIVITY CELLS  
A conductivity measuring cell comprising two tubes arranged concentrically one within the other the outer tube being closed at one end, a first pair of electrodes for connection to a current source...
3753095 BATTERY TESTER HAVING A PLIABLE RESILIENT BODY MEMBER FOR ACCOMODATING THE BATTERY TO BE TESTED  
A detectable energy indicating means is disclosed having structure adapted to receive disc or button shaped energy sources such as, for example, those utilized for hearing aids. Encapsulated...
3736498 BATTERY TESTER  
A battery tester comprising an indicator lamp carried by an arm extending over a base which receives a battery to be tested. The arm is attached to a plunger, vertically slidable within a stem...
Matches 1 - 50 out of 66 1 2 >