Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8129952 | Battery systems and operational methods This disclosure includes battery systems and operational methods. According to one aspect, a battery system includes conversion circuitry, a plurality of main terminals configured to be coupled with a load, a charger and a plurality of rechargeable battery modules w... | 03/06/2012 |
| 8120327 | System and method for using stored electrical energy to quiet power sensitive measurement circuits The present invention is a system and method for temporarily storing electrical energy to power sensitive measurement circuits. In one embodiment, a switch-mode power converter is operable to charge an energy storage device. After the energy storage device is suffic... | 02/21/2012 |
| 8115454 | Battery with an integrated voltage converter having a bypass circuit Disclosed is a battery having an internally integrated voltage converter module. The battery includes at least one electrochemical cell having an internal bore, a voltage converter module electrically coupled to the at least one electrochemical cell and disposed wit... | 02/14/2012 |
| 8072187 | Battery-charging device for a stand-alone generator system having a MPPT function and method thereof A battery-charging device, having a maximum power point tracking (MPPT) function, for a stand-alone generator system includes a DC/DC power converter and a control circuit used to control the DC/DC power converter. The method applied in the device includes: performi... | 12/06/2011 |
| 8072186 | USB charger circuit A USB charger circuit includes at least a converter, a control circuitry, a first resistor, a second resistor, an error amplifier, a sense resistor and a diode. The converter has a transistor. The control circuitry is coupled to the transistor. The control circuitry... | 12/06/2011 |
| 7977921 | AC-to-DC voltage conversion and charging circuitry Voltage conversion and charging circuitry and method for converting an alternating current (AC) voltage to a direct current (DC) voltage for charging an energy storage element (e.g., battery or supercapacitor). An output capacitance, which is initially charged quick... | 07/12/2011 |
| 7977920 | Voltage-converter circuit and method for clocked supply of energy to an energy storage The present invention provides a voltage converter circuit for the clocked supplying of energy to an energy storage, based on an input voltage present at an input of the voltage converter circuit. The voltage converter circuit comprises an energy storage and a switc... | 07/12/2011 |
| 7915864 | Power converter with transient processing capability Transient processing mechanisms for power converters. Error generation circuitry in a power converter may generate an error signal based on the difference between a power converter output voltage and a reference voltage. Transient detection circuitry may detect whet... | 03/29/2011 |
| 7880441 | DC-DC converter for carrying out constant output power control and maintaining a secondary battery at a set drooping voltage In a DC-DC converter using, as an input source, a fuel cell, a solar cell, or the like, having a relatively large output impedance in a power-supply mode, an arbitrary load and secondary battery based on magnetic coupling in which voltage values are determined by a ... | 02/01/2011 |
| 7863865 | Systems and methods for pulse charging a battery Embodiments of the present invention include techniques for charging a battery. In one embodiment, the present invention includes a method comprising determining if a maximum current output of a power source is above a threshold, configuring a regulator coupled to t... | 01/04/2011 |
| 7855532 | Power supply circuit with control switches to voltage multiplier having same frequency as clock A power supply circuit includes a first power supply configured to output a first voltage; a second power supply provided separately from the first power supply to output a second voltage; and a boosting circuit configured to use the first voltage as an input voltag... | 12/21/2010 |
| 7852046 | Power source switchover apparatus and method An apparatus for switching from a first power supply to a second power supply. Such an apparatus may determine which of the first and second power supplies has a greater voltage, and may power a device from the power supply having the greater voltage or charge. A si... | 12/14/2010 |
| 7808211 | System and method for charging batteries A high frequency battery charger includes a converter, drive logic, and control logic. The converter transforms a DC voltage into a high frequency AC voltage. The drive logic controls a conversion of the high frequency AC voltage through a train of pulses. The contr... | 10/05/2010 |
| 7772806 | Power storage system A power storage system regulates DC power from a DC power supply into prescribed voltage and current using a DC-DC converter unit for storage in a storage unit. On the DC power supply side of the DC-DC converter, the system includes a primary side current detecting ... | 08/10/2010 |
| 7663345 | Circuit and method for controlling DC-DC converter A DC-DC converter for generating a stable output voltage and being applicable to a transient load fluctuation. The DC-DC converter detects an input current, and compares the input current with a rated current of an external power supply. The DC-DC converter controls... | 02/16/2010 |
| 7633266 | Charger circuit and transformer used therein The present invention discloses a transformer used in a charger circuit, in which the input side of the transformer is connected to an AC input and PWM control circuit of the charger circuit, the output side of the transformer is connected to a constant current and/... | 12/15/2009 |
| 7598711 | Power source switchover apparatus and method An apparatus for switching from a first power supply to a second power supply. The embodiment may detect the charge or voltage of both the first and second power supply, and power a device from the power supply having the greatest voltage or charge. A single boost c... | 10/06/2009 |
| 7439708 | Battery charger with control of two power supply circuits To reduce power consumption when charging a secondary battery is not performed, a first power supply circuit is disabled but a second power supply circuit is enabled when the secondary battery is unloaded from a battery charger. Both the first and second power suppl... | 10/21/2008 |
| 7411374 | Circuitry and control method for charging capacitive loads A capacitor charging circuit comprises, power transfer circuitry, power switching control circuitry and voltage measurement circuitry. The power transfer circuitry transfers power from a power source to a capacitor. The power switching control circuitry controls the... | 08/12/2008 |
| 7405526 | Control apparatus and control method for voltage conversion apparatus The SOC of a battery is calculated based on the voltage Vb and current Ib of a battery, and a battery electromotive voltage Vbo is calculated based on the SOC of the battery. Based on the battery electromotive voltage Vbo and the voltage Vc of a capacitor connected ... | 07/29/2008 |
| 7363522 | Apparatus and methods for information handling system with power supply device with variable output power An information handling system includes a power source configured to provide a plurality of power levels to a load. At least one of the plurality of power levels corresponds to a level obtained by de-rating a capacity of the power source from a nominal design specif... | 04/22/2008 |
| 7339354 | Rechargeable battery charging method and apparatus A method and an apparatus for charging a lithium-ion based rechargeable battery in a short time is provided. A terminal voltage of the rechargeable battery is compared with a predetermined first set voltage V1 while charging the rechargeable battery with a co... | 03/04/2008 |
| 7336978 | Mobile device having an overcurrent cutoff function A mobile device having an overcurrent cutoff function. In a mobile device having at least one function module, the mobile device includes a main power supply which supplies power to the mobile device, a power detection unit which detects whether power from the main ... | 02/26/2008 |
| 7335055 | Power supply control apparatus A control apparatus is provided for controlling a power supply. The apparatus includes a direct current (DC) transformer, a plug, a plurality of electrical outlets, a plurality of switches corresponding to the electrical outlets, a plurality of relays, a fuse, and a... | 02/26/2008 |
| 7312596 | Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy ... | 12/25/2007 |
| 7298113 | Battery pack A detecting switch which is turned on/off in accordance with whether or not primary batteries have been attached to a primary battery holder is provided. In a normal state where no primary battery is attached, terminals (a, c) of a charge change-over switch are conn... | 11/20/2007 |
| 7268520 | Sense amplifier for use with wake-up charging current A sense amplifier adapted to amplify a voltage signal representative of a charging current provided to a rechargeable battery. The sense amplifier may include a p-type input sense amplifier and an n-type input sense amplifier, The p-type input sense amplifier may be... | 09/11/2007 |
| 7263388 | Charging system for portable equipment A wall (103 in FIG. 1) is erected perpendicularly to a floor (101), and a charger body (105) in which a primary side coil (201) and a power feed portion (203) are included is mounted on the wall (103). An induction co... | 08/28/2007 |
| 7233079 | Renewable energy electric power generating system A renewable electric power system includes a high temperature superconducting wind turbine using high temperature superconducting yttrium-barium-copper oxide for the rotor and stator windings as well as a superconducting bearing. Power from the turbine is stored in ... | 06/19/2007 |
| 7221064 | Power circuit for battery A power circuit for a battery for, even when an idle-stop operation is continuously performed, preventing reduction of an electric power supplied to a motor at start-up to obtain a set engine rpm. The power circuit includes a series-connected power supply in which a... | 05/22/2007 |
| 7212419 | Adaptively configured and autoranging voltage transformation module arrays A method and apparatus for adaptively configuring an array of voltage transformation modules is disclosed. The aggregate voltage transformation ratio of the adaptive array is adjusted to digitally regulate the output voltage for a wide range of input voltages. An in... | 05/01/2007 |
| 7211986 | Inductive charging system An apparatus for inductive charging a battery. The apparatus includes a housing with a lower surface and a charging surface. A rechargeable device with a rechargeable battery may be placed on the charging surface. The apparatus further includes a controller for driv... | 05/01/2007 |
| 7199537 | Voltage converter control apparatus, and method By using a target voltage Vc* of a capacitor connected to the output side of a DC/DC converter and a voltage Vb of a battery connected to the input side of the DC/DC converter, a duty ratio D as a drive instruction of the DC/DC converter is calculated. By using the ... | 04/03/2007 |
| 7187531 | Transient suppressor and power converter employing the same The present invention is directed to a transient suppressor, a method of suppressing a peak voltage associated with a rectifier, and a power converter employing the same. In one embodiment, the transient suppressor includes a saturable reactor circuit interposed bet... | 03/06/2007 |
| 7180248 | Inductively coupled ballast circuit A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal... | 02/20/2007 |
| 7180254 | Method and apparatus for controlling an oscillating electric motor of a small electric appliance A method of controlling an oscillating electric motor of a small electric appliance, the method including supplying an electric current to a coil to produce a magnetic field emanating from a first motor component and setting a second motor component in an oscillator... | 02/20/2007 |
| 7170763 | Apparatus and method for constant delta current control in a capacitor charger In a capacitor charger, a transformer has a primary winding connected between an input voltage and a switch for generating a primary current flowing through the primary winding by switching the switch to thereby induce a secondary current flowing through a secondary... | 01/30/2007 |
| 7151358 | Multi-battery automatic charging circuit with individual regulator A multi-battery automatic charging circuit with individual regulator is further provided with one secondary or more than one output interface to convert an AC source via a rectifier into a DC charging source, thus to supply power to an external rechargeable device o... | 12/19/2006 |
| 7135836 | Modular and reconfigurable rapid battery charger The battery charger is modular and reconfigurable. It includes charging modular power stages that are configured to receive an alternating current (AC) input and provide a direct current (DC) output for charging a battery. These modular power stages include an inver... | 11/14/2006 |
| 7119519 | Control apparatus for on-vehicle generator that sends power from the battery to the field winding and from the field winding back to the battery A control apparatus for an on-vehicle generator is provided. The generator, driven to rotate by an on-vehicle engine, is provided with stator windings, rectifiers, a field winding, and a voltage control apparatus (i.e., the control apparatus for the on-vehicle gener... | 10/10/2006 |
